CG8729AFT - CYPRESS SEMICONDUCTOR

VR25, VR37, VR68

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High Ohmic / High Voltage Metal Glaze Leaded Resistors

DESIGN SUPPORT TOOLS

A metal glazed film is deposited on a high grade ceramic

body. After a helical groove has been cut in the resistive

layer, tinned electrolytic copper wires are welded to the

end-caps. The resistors are coated with a light blue lacquer

which provides electrical, mechanical, and climatic

protection.

FEATURES

• UL Approved (UL1676, file no: E171160)

• Meet the safety requirements of:

- IEC 60065

- DIN EN 60065

- VDE 0860

- CQC (China)

• AEC-Q200 qualified (VR25, VR37)

• High pulse loading capability (maximum 10 kV)

• Radial version available for VR25

• Material categorization: for definitions of compliance

please see www.vishay.com/doc?99912

APPLICATIONS

• Where high resistance, high stability, and high reliability at

high voltage are required

• High humidity environment

• White goods

• Power supplies

• Automotive electronics

Note

(1) Ohmic values (other than resistance range) are available on request

click logo to get started

Available

Models

TECHNICAL SPECIFICATIONS

DESCRIPTION VR25 VR37 VR68

Imperial size 0207 0309 0718

Resistance range (1) 100 k to 22 M100 k to 33 M100 k to 68 M

Resistance tolerance ± 10 %; ± 5 %; ± 1 %

Temperature coefficient  ± 200 ppm/K

Rated dissipation, P70 0.25 W 0.5 W 1.0 W

Operating voltage, Umax. AC/DC 1600 V 3500 V 10 000 V

Operating temperature range -55 °C to +155 °C

Peak permissible film temperature 155 °C

Thermal resistance (Rth) 140 K/W 120 K/W 70 K/W

Insulation voltage:

1 min.; Uins 700 V

Maximum noise (white noise) 5 µV/V 2.5 µV/V 2.5 µV/V

Max. resistance change at

rated dissipation for resistance range,

|R/R| max., after 1000 h

1.5 % 1.5 % 1.5 %

SAFETY REQUIREMENTS AND QUALIFICATIONS

DESCRIPTION VR25, VR37 VR37 VR68

Safety requirements / qualifications AEC-Q200

UL1676 qualification (file no: E171160)

for ohmic range 510 k to 11 M;

DIN EN 60065 (VDE 0860): 2015; clause 14.2 a);

EN 60065: 2014

IEC 60065: clause 14.2 a)

CQC

VR25, VR37, VR68

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Note

(1) See table “Temperature Coefficient and Resistance Range” for selecting correct ohmic value - tolerance combination

TEMPERATURE COEFFICIENT AND RESISTANCE RANGE

TYPE TCR TOLERANCE RESISTANCE E-SERIES

VR25

 ± 200 ppm/K

± 1 % 100 k to 15 ME24; E96

± 5 % 100 k to 22 ME24; E96

± 10 % 15 M to 22 ME24

VR37 ± 1 % 100 k to 33 ME24; E96

± 5 % 100 k to 33 ME24

VR68 ± 1 % 100 k to 68 ME24; E96

± 5 % 100 k to 68 ME24

PART NUMBER AND PRODUCT DESCRIPTION

PART NUMBER: VR25000001003FA100

TYPE / SIZE VARIANT TCR RESISTANCE TOLERANCE (1) PACKAGING SPECIAL

VR25000 = VR25

VR37000 = VR37

VR68000 = VR68

0 = neutral 0 = standard 3 digit value

1 digit multiplier

MULTIPLIER

0 = *100

1 = *101

2 = *102

3 = *103

4 = *104

5 = *105

6 = *106

F = ± 1 %

J = ± 5 %

K = ± 10 %

00 = standard

PRODUCT DESCRIPTION: VR25 1 % A1 100K

VR25 1 % A1 100K

TYPE / SIZE TOLERANCE PACKAGING RESISTANCE

VR25

VR37

VR68

± 1 %

± 5 %

± 10 %

100K = 100 k

15M = 15 M

PACKAGING

TYPE CODE QUANTITY PACKAGING STYLE WIDTH PITCH DIMENSIONS

VR25

A1 1000 Taped according to IEC 60286-1 fan-folded in a box 53 mm 5 mm 75 mm x 31 mm x 260 mm

A5 5000 53 mm 5 mm 76 mm x 105 mm x 265 mm

N4 4000 Taped according to IEC 60286-2 fan-folded in a box - 12.7 mm 48 mm x 253 mm x 330 mm

R5 5000 Taped according to IEC 60286-1 on a reel 53 mm 5 mm 93 mm x 300 mm x 298 mm

VR37 A1 1000 Taped according to IEC 60286-1 fan-folded in a box 53 mm 5 mm 72 mm x 60 mm x 258 mm

R5 5000 Taped according to IEC 60286-1 on a reel 53 mm 5 mm 90 mm x 375 mm x 375 mm

VR68 AC 500 Taped according to IEC 60286-1 fan-folded in a box 66 mm 10 mm 82 mm x 111 mm x 256 mm

RD 750 Taped according to IEC 60286-1 on a reel 66 mm 10 mm 105 mm x 315 mm x 305 mm

V R 5 0 0 0 0 0 1 0 0 3 F A 1 0 02

VR25, VR37, VR68

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DESCRIPTION

Production is strictly controlled and follows an extensive

set of instructions established for reproducibility. A

homogeneous film of metal alloy is deposited on a high

grade ceramic body and conditioned to achieve the desired

temperature coefficient. Plated steel termination caps are

firmly pressed on the metalized rods. Mostly, a special laser

is used to achieve the target value by smoothly cutting a

helical groove in the resistive layer without damaging the

ceramics. Connecting wires of electrolytic copper plated

with 100 % pure tin are welded to the termination caps.

The resistor elements are covered by a light blue

protective coating designed for electrical, mechanical, and

climatic protection. Four or five color code rings designate

the resistance value and tolerance in accordance with

IEC 60062.

Yellow and gray are used instead of gold and silver because

metal particles in the lacquer could affect high-voltage

properties.

The result of the determined production is verified by an

extensive testing procedure performed on 100 % of the

individual resistors. Only accepted products are stuck

directly on the adhesive tapes in accordance with

IEC 60286-1 or for the radial versions in accordance to

IEC 60286-2.

MATERIALS

Vishay acknowledges the following systems for the

regulation of hazardous substances:

• IEC 62474, Material Declaration for Products of and for the

Electrotechnical Industry, with the list of declarable

substances given therein (1)

• The Global Automotive Declarable Substance List

(GADSL) (2)

• The REACH regulation (1907/2006/EC) and the related list

of substances with very high concern (SVHC) (3) for its

supply chain

The products do not contain any of the banned substances

as per IEC 62474, GADSL, or the SVHC list, see

www.vishay.com/how/leadfree.

Hence the products fully comply with the following

directives:

• 2000/53/EC End-of-Life Vehicle Directive (ELV) and

Annex II (ELV II)

• 2011/65/EU Restriction of the Use of Hazardous

Substances Directive (RoHS) with amendment

2015/863/EU

• 2012/19/EU Waste Electrical and Electronic Equipment

Directive (WEEE)

Vishay pursues the elimination of conflict minerals from its

supply chain, see the Conflict Minerals Policy at

www.vishay.com/doc?49037.

ASSEMBLY

The resistors are suitable for processing on automatic

insertion equipment and cutting and bending machines.

Excellent solderability is proven, even after extended

storage. They are suitable for automatic soldering using

wave or dipping.

The resistors are completely lead (Pb)-free, the pure tin

plating provides compatibility with lead (Pb)-free and

lead-containing soldering processes. The immunity of the

plating against tin whisker growth, in compliance with

IEC 60068-2-82, has been proven under extensive testing.

The encapsulant is resistant to cleaning solvent specified in

IEC 60115-1. The suitability of conformal coatings, if

applied, shall be qualified by appropriate means to ensure

the long-term stability of the whole system.

APPROVALS

These resistors meet the safety requirements of:

• UL1676 (510 k to 11 M); file no: E171160

• IEC 60065, clause 14.2 a)

• DIN EN 60065, clause 14.2 a)

• VDE 0860, clause 14.2 a)

• CQC, China

RELATED PRODUCTS

For a correlated range of Metal Film Resistors see the

datasheet:

“High Ohmic / High Voltage Metal Film Leaded Resistors”,

www.vishay.com/doc?30260

For product that offers high power dissipation and metal

oxide film technology see the datasheet:

“High Power Metal Oxide Leaded Resistors”, 

www.vishay.com/doc?20128

Notes

(1) The IEC 62474 list of declarable substances is maintained in a dedicated database, which is available at http://std.iec.ch/iec62474

(2) The Global Automotive Declarable Substance List (GADSL) is maintained by the American Chemistry Council, and available at

www.gadsl.org

(3) The SVHC list is maintained by the European Chemical Agency (ECHA) and available at http://echa.europa.eu/candidate-list-table

VR25, VR37, VR68

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FUNCTIONAL PERFORMANCE

Derating

Hot-Spot Temperature Rise (T) as a Function of Dissipated Power

VR25 VR37

VR68

-55

Ambient Temperature in °C

Power in %

050

70 100 125 155

100

0 0.10 0.250.20P (W)

ΔT

(K)

0.150.05

0 0.2 0.50.4 P (W)

ΔT

(K)

0.30.1

0 0.4 1.00.8 P (W)

ΔT

(K)

0.60.2

VR25, VR37, VR68

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Maximum allowed peak pulse voltage in accordance with IEC 60065, 14.2 a);

50 discharges from a 1nF capacitor charged to Ûmax.; 12 discharges/min (drift R/R  2 %)

VR25

VR37

VR68

10-2 10-1 102

Rn (MΩ)

Ûmax.

(kV)

10-2 10-1 102

Rn (MΩ)

Ûmax.

(kV) 10

10-2 10-1 102

Rn (MΩ)

Ûmax.

(kV)

VR25, VR37, VR68

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Temperature Rise (T) at the Lead End (Soldering Point) as a Function of Dissipated Power at Various Lead Lengths

after Mounting

VR25

VR37

VR68

0 0.10 0.2250.20

P (W)

ΔT

(K)

0.1750.075

5 mm

10 mm

15 mm

0.150.1250.050.025 0.25

0 0.2 0.50.4

0.30.1

15 mm

10 mm

5 mm

P (W)

ΔT

(K)

P (W)

ΔT

(K)

0 0.4 1.00.8

0.60.2

15 mm

10 mm

VR25, VR37, VR68

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TESTS PROCEDURES AND REQUIREMENTS

All tests are carried out in accordance with the following

specifications:

• IEC 60115-1, generic specification (includes tests)

The test and requirements table contains only the most

important tests. For the full test schedule refer to the

documents listed above.

The tests are carried out with reference to IEC 60115-1, in

accordance with IEC 60068-2-xx test method and under

standard atmospheric conditions in accordance with

IEC 60068-1, 5.3.

A climatic category 55 / 155 / 56 is applied, defined by the

lower category temperature (LCT = -55 °C), the upper

category temperature (UCT = 155 °C), and the duration

of exposure in the damp heat, steady state test (56 days).

Unless otherwise specified the following values apply:

• Temperature: 15 °C to 35 °C

• Relative humidity: 45 % to 75 %

• Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).

For performing some of the tests, the components are

mounted on a test board in accordance with IEC 60115-1,

4.31.

In test procedures and requirements table, only the tests

and requirements are listed with reference to the relevant

clauses of IEC 60115-1 and IEC 60068-2-xx test methods.

A short description of the test procedure is also given.

TESTS PROCEDURES AND REQUIREMENTS

IEC 60115-1

CLAUSE

IEC 60068-2

TEST METHOD TEST PROCEDURE

REQUIREMENTS

PERMISSIBLE CHANGE

(Rmax.)

4.6.1.1 Insulation resistance Umax. DC = 500 V during 1 min; V-block method Rins min.: 10 000 M

4.7 Voltage proof URMS = Uins; 60 s No breakdown or flashover

4.8 Temperature coefficient At (20 / -55 / 20) °C and (20 / 155 / 20) °C  ± 200 ppm/K

4.12 Noise IEC 60195

VR25: max. 5 V/V

VR37: max. 2.5 V/V

VR68: max. 2.5 V/V

4.13 Short time overload

Room temperature; 2.5 x ;

(voltage not more than 2 x limiting voltage);

10 cycles; 5 s ON and 45 s OFF

R max.: ± 2 % R

4.16

21 (Ua1)

21 (Ub)

21 (Uc)

Robustness of

terminations Tensile, bending, and torsion No damage

R max.: ± 0.5 % R

4.17 20 (Ta) Solderability

+235 °C; 2 s; solder bath method; SnPb40

+245 °C; 3 s; solder bath method; SnAg3Cu0.5

(before aging)

Good tinning ( 95 % covered);

no damage

+235 °C; 2 s; solder bath method; SnPb40

+245 °C; 3 s; solder bath method; SnAg3Cu0.5

(after aging)

Good tinning ( 95 % covered);

no damage

4.18 20 (Tb) Resistance to

soldering heat

Unmounted components

(260 ± 5) °C; (10 ± 1) s R max.: ± 0.5 % R

4.19 14 (Na) Rapid change

of temperature

30 min at -55 °C and 30 min at +155 °C;

5 cycles R max.: ± 0.5 % R

4.20 29 (Eb) Bump 3 x 1500 bumps in 3 directions; 40 gNo damage

R max.: ± 0.5 % R

4.22 6 (Fc) Vibration

10 sweep cycles per direction;

10 Hz to 2000 Hz;

1.5 mm or 200 m/s2

No damage

R max.: ± 0.5 % R

4.23 Climatic sequence:

Rins min.: 1 G

R max.: ± 1.5 % R

4.23.2 2 (Bb) Dry heat 16 h; 155 °C

4.23.3 30 (Db) Damp heat

cyclic

24 h; 25 °C to 55 °C;

90 % to 100 % RH

4.23.4 1 (Ab) Cold 2 h; -55 °C

4.23.5 13 (M) Low air pressure 2 h; 8.5 kPa;

15 °C to 35 °C

4.23.6 30 (Db) Damp heat

remaining cyclic

5 days; 55 °C;

95 % to 100 % RH; 5 cycles

4.23.7 DC load Apply rated power for 1 min

P70 x R

VR25, VR37, VR68

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DIMENSIONS

VR25 WITH RADIAL TAPING

Lead Spacing (F = 4.8 mm), Size 0207



4.24 78 (Cab) Damp heat

(steady state)

56 days; 40 °C;

90 % to 95 % RH; loaded with 0.01 P70

(steps: 0 V to 100 V)

R max.: ± 1.5 % R

4.25.1 Endurance (at 70 °C) 1000 h; loaded with P70 or Umax.;

1.5 h ON and 0.5 h OFF R max.: ± 1.5 % R

4.26 Active flammability

“cheese-cloth test”

Steps of:

5 / 10 / 16 / 25 / 40 x P70 duration 5 min

VR25: no flaming of

gauze cylinder

VR68: no flaming of

gauze cylinder

4.35 Passive flammability

“needle-flame test” Application of test flame for 20 s

No ignition of product;

no ignition of under-layer;

burning time less than 30 s

DIMENSIONS - Leaded resistor types, mass, and relevant physical dimensions

TYPE Ø Dmax. (mm) L1 max. (mm) L2 max. (mm) Ø d (mm) MASS (mg)

VR25 2.5 6.5 7.5 0.58 ± 0.05 212

VR37 4.0 9.0 10.0 0.70 ± 0.03 457

VR68 6.8 18.0 19.0 0.78 ± 0.05 1690

TESTS PROCEDURES AND REQUIREMENTS

IEC 60115-1

CLAUSE

IEC 60068-2

TEST METHOD TEST PROCEDURE

REQUIREMENTS

PERMISSIBLE CHANGE

(Rmax.)

α = 30° to 40°

DIMENSIONS in millimeters

Pitch of components P 12.7 ± 1.0

Lead spacing F 4.8 + 0.7 / - 0.0

Width of carrier tape W 18.0 ± 0.5

Body to hole center H 19.5 ± 1.0

Height for cutting (max.) L 11

Height for bending H016.5 ± 0.5

Component height (max.) H129

VR25, VR37, VR68

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HISTORICAL 12NC INFORMATION

• The resistors have a 12-digit numeric code starting with

- 2322 241 refers to VR25

- 2322 242 refers to VR37

- 2322 244 refers to VR68

• The subsequent first digit for 1 % tolerance products (E24

and E96 series) or 2 digits for 5 % (E24 series) and 10 %

(E12 series) indicate the resistor type and packing

• The remaining digits indicate the resistance value:

- The first 3 digits for 1 % or 2 digits for 5 % and 10 %

tolerance products indicate the resistance value

- The last digit indicates the resistance decade



Last Digit of 12NC Indicating Resistance Decade

Historical 12NC Example

• The 12NC for a VR25, resistor value 7.5 M, 5 %

tolerance, supplied on a bandoleer of 1000 units in

ammopack, is: 2322 241 13755.

• The 12NC for a VR37, resistor value 7.5 M, 5 %

tolerance, supplied on a bandoleer of 1000 units in

ammopack, is: 2322 242 13755.

• The 12NC for a VR68, resistor value 7.5 M, 5 %

tolerance, supplied on a bandoleer of 500 units in

ammopack, is: 2322 244 13755.

RESISTANCE DECADE LAST DIGIT

100 k to 976 k4

1 M to 9.76 M5

 10 M6

12NC CODING FOR VR25, VR37, VR68 - Resistor type and packaging

TYPE TOLERANCE

(%)

VR25 CODING STARTS WITH 2322 241 .....

VR37 CODING STARTS WITH 2322 242 .....

VR68 CODING STARTS WITH 2322 244 .....

BANDOLIER IN AMMOPACK BANDOLIER ON REEL

RADIAL TAPED STRAIGHT LEADS

4000 UNITS 52 mm 52 mm 66.7 mm 52 mm 66.7 mm

1000 UNITS 5000 UNITS 500 UNITS 5000 UNITS 750 UNITS

VR25

± 1 0.... 8.... 7.... - 6.... -

± 5 36... 13... 53... - 23... -

± 10 38... 12... 52... - 22... -

VR37 ± 1 - 8.... - - 6.... -

± 5 - 13... - - 23... -

VR68 ± 1 - - - 8.... - 6....

± 5 - - - 13... - 23...

Legal Disclaimer Notice

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Disclaimer



ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE

RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,

“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other

disclosure relating to any product.

Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or

the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all

liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,

consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular

purpose, non-infringement and merchantability.

Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of

typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding

statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a

particular product with the properties described in the product specification is suitable for use in a particular application.

Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over

time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s

technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,

including but not limited to the warranty expressed therein.

Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining

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Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for

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