MP850-50.0-1% - Caddock - Product.Network

Sales and Corporate Ofﬁce

1717 Chicago Avenue

Riverside, California 92507-2364

Phone: (951) 788-1700

Fax: (951) 369-1151

Applications Engineering

17271 North Umpqua Hwy.

Roseburg, Oregon 97470-9422

Phone: (541) 496-0700

Fax: (541) 496-0408

e-mail: caddock@caddock.com • web: www.caddock.com

For Caddock Distributors listed by country see caddock.com/contact/dist.html

CAD KDOC

• 20 Watts at +25°C Case Temperature derated to zero at +175°C.

• Metal Heat Sink Mounting Tab.

• MP820 Resistance Range of 10.0 ohm to 10.0 K.

• MP821 Resistance Range of 0.020 ohm to 9.99 ohm.

• Resistor element is electrically isolated from the mounting surface.

• Non-Inductive design for high speed switching, snubbers,

and rf applications.

MP825

TO-126 Style Power Package

The MP825 and MP850 Kool-Pak® Power Film Resistors are constructed with Caddock's

Micronox® resistance ﬁlm ﬁred onto a ﬂat ceramic substrate. The ceramic substrate is

bonded to a copper heat sink which becomes the metal mounting surface. This

assembly is molded with the copper heat sink ﬂush with the back surface of the part. The

terminal attachment and resistance element geometry are conﬁgured to provide

outstanding non-inductive performance.

MP825 and MP850 Power Film Resistors

Include an Integral Metal Mounting Surface

for Highly Efﬁcient Thermal Transfer

Certain products shown in this catalog are covered by one or more patents, there are also patents pending.

MP800 Series Kool-Pak® Power Film Resistors

TO-220 Style and TO-126 Style - Non-Inductive Designs

• 50 Watts at +25°C Case Temperature derated to zero at +150°C.

• Copper Heat Sink Integral in the Molded Package.

• Resistance Range of 0.20 ohm to 10.0 K.

• Resistor element is electrically isolated from the mounting surface.

• Non-inductive Design.

MP820 and MP821 TO-220 Style Power Package

with Metal Mounting Tab

Use your thermal design experience with power semiconductors in TO-220 and

TO-126 style power packages to help you get the most out of this unique family of

power resistors. The thermal design issues are the same where power handling

capability is based on the case temperature which is maintained in your design.

MP850 - 50.0 - 1%

Model Number:

Resistor Value:

Tolerance

The MP820 and MP821 Kool-Tab® Power Film Resistors are constructed with Caddock's

Micronox® resistance ﬁlm ﬁred onto a ﬂat ceramic substrate which is thermally bonded to

the copper heat sink tab. The resistor body is then molded with a high temperature

molding compound to ﬁnish the metal tab TO-220 package. The lead wire attachment

and resistance element geometry are conﬁgured to provide outstanding non-inductive

performance.

For custom resistance values and tolerances contact applications engineering

MP825 Standard Resistance Values:

0.020 Ω 5%

0.025 Ω 5%

0.030 Ω 5%

0.033 Ω 5%

0.040 Ω 5%

0.050 Ω

0.075 Ω

0.10 Ω

0.15 Ω

0.20 Ω

0.25 Ω

Tolerance MP825: ±1% standard (except as noted), (0.5%, 2%,

5%,10%, and 20% are available for most resistance values).

0.30 Ω

0.33 Ω

0.40 Ω

0.50 Ω

0.75 Ω

1.00 Ω

1.50 Ω

2.00 Ω

2.50 Ω

3.00 Ω

3.30 Ω

4.00 Ω

5.00 Ω

7.50 Ω

8.00 Ω

10.0 Ω

12.0 Ω

15.0 Ω

20.0 Ω

25.0 Ω

27.0 Ω

30.0 Ω

33.0 Ω

40.0 Ω

47.0 Ω

50.0 Ω

56.0 Ω

75.0 Ω

100 Ω

120 Ω

150 Ω

200 Ω

250 Ω

300 Ω

330 Ω

400 Ω

470 Ω

500 Ω

560 Ω

750 Ω

1.00 K

1.50 K

2.00 K

2.50 K

3.00 K

3.30 K

4.00 K

5.00 K

7.50 K

10.0 K

MP850 Standard Resistance Values:

0.20 Ω

0.25 Ω

0.30 Ω

0.33 Ω

0.40 Ω

0.50 Ω

0.75 Ω

1.00 Ω

1.50 Ω

2.00 Ω

2.50 Ω

3.00 Ω

3.30 Ω

4.00 Ω

5.00 Ω

7.50 Ω

8.00 Ω

10.0 Ω

12.0 Ω

15.0 Ω

20.0 Ω

25.0 Ω

27.0 Ω

30.0 Ω

33.0 Ω

40.0 Ω

47.0 Ω

50.0 Ω

56.0 Ω

75.0 Ω

100 Ω

120 Ω

150 Ω

200 Ω

250 Ω

300 Ω

330 Ω

400 Ω

470 Ω

500 Ω

560 Ω

750 Ω

1.00 K

1.50 K

2.00 K

Tolerance MP850: ±1% standard, (0.5%, 2%, 5%,10%, and 20%

are available for most resistance values).

2.50 K

3.00 K

3.30 K

4.00 K

5.00 K

7.50 K

10.0 K

• 25 Watts at +25°C Case Temperature derated to zero at +150°C.

• Copper Heat Sink Integral in the Molded Package.

• Resistance Range of 0.020 ohm to 10.0 K.

• Resistor element is electrically isolated from the mounting surface.

• Non-inductive Design.

Construction of MP825 and MP850:

Ordering Information:

Construction of MP820 and MP821:

MP850

TO-220 Style Power Package

MP821 Standard Resistance Values:

0.020 Ω

0.025 Ω

0.030 Ω

0.033 Ω

0.040 Ω

Tolerance MP821: ±1% Standard (0.5%, 2%, 5%, 10%, and 20%

are available for most resistance values).

0.050 Ω

0.075 Ω

0.10 Ω

0.15 Ω

0.20 Ω

0.25 Ω

0.30 Ω

0.33 Ω

0.40 Ω

0.50 Ω

0.75 Ω

1.00 Ω

1.50 Ω

2.00 Ω

2.50 Ω

3.00 Ω

3.30 Ω

4.00 Ω

5.00 Ω

7.50 Ω

8.00 Ω

MP820 Standard Resistance Values:

10.0 Ω

12.0 Ω

15.0 Ω

20.0 Ω

25.0 Ω

27.0 Ω

Tolerance MP820: ±1% Standard (0.5%, 2%, 5%, 10%, and 20%

are available for most resistance values).

30.0 Ω

33.0 Ω

40.0 Ω

47.0 Ω

50.0 Ω

56.0 Ω

75.0 Ω

100 Ω

120 Ω

150 Ω

200 Ω

250 Ω

300 Ω

330 Ω

400 Ω

470 Ω

500 Ω

560 Ω

750 Ω

1.00 K

1.50 K

2.00 K

2.50 K

3.00 K

3.30 K

4.00 K

5.00 K

7.50 K

10.0 K

Packaging: MP800 Series Resistors are packaged in plastic shipping tubes,

50 pieces per tube when the order quantity permits.

Page 1 of 2

28_IL103.1004

Sales and Corporate Ofﬁce

1717 Chicago Avenue

Riverside, California 92507-2364

Phone: (951) 788-1700

Fax: (951) 369-1151

Applications Engineering

17271 North Umpqua Hwy.

Roseburg, Oregon 97470-9422

Phone: (541) 496-0700

Fax: (541) 496-0408

e-mail: caddock@caddock.com • web: www.caddock.com

For Caddock Distributors listed by country see caddock.com/contact/dist.html

CAD KDOC

DIMENSIONS IN INCHES AND (MILLIMETERS)

.640 ±.010

(16.26 ±.26)

.030 ±.004

(.76 ± .10)

.025 ± .004

(.64 ±.10)

.200 ±.010

(5.08 ±.26)

.500 ±.050

(12.70 ±1.27)

.130 ±.030

(3.30 ±.76)

.125 ±.010

(3.18 ±.26)

.410 ±.010

(10.41 ±.26)

MP850

10.0

.125 ±.010

(3.18 ±.26)

.125 ±.004

(3.18 ±.10) DIA.

.053 ± .007

(1.35 ± .18)

.070 ±.010

(1.78 ±.26)

Figure 2

TO-126 Style

MP825

Figure 1

Metal Tab

TO-220 Style

MP820 and MP821

MP820

50.0

.540 ±.040

(13.72 ±1.02)

.117 ±.003

(2.97 ±.08)

.240 ±.010

(6.10 ±.26)

.400 ±.010

(10.16 ±.26)

.200 ±.010

(5.08 ±.26)

.032 ± .004 DIA.

(.81 ± .10)

.175 ±.015

(4.45 ±.38)

.052 ±.003

(1.32 ±.08)

.580 ±.010

(14.73 ±.26)

.097 ±.010

(2.46 ±.26)

.142 ±.003

(3.61 ±.08) DIA.

Figure 3

TO-220 Style

MP850

All power and associated overload ratings are derated

based upon case temperature using the derating curve.

The case temperature is measured at the center of the

metal mounting surface, with the part properly mounted

and under electrical load. Without a heat sink, when in

free air at +25°C, the MP820, MP821, and MP850 are

rated for 2.25 watts, the MP825 is rated for 1.25 watts.

The thermal design should satisfy the following equation:

Case Temperature (Tc) + [Thermal Resistance (RθJC) x power applied (Watts)] ≤ TMAX considering the full

operating temperature range of the application.

Mounting Note: Mount on a smooth, clean and ﬂat heat sink surface with a thermal interface material, such

as thermal grease. The entire exposed metal backface portion must be in thermal contact with the heat sink.

When screw mounting, use a compression washer which provides a mounting force of 150 to 300 pounds

(665 to 1330 N). This will provide sufﬁcient pressure on the package over time and through large temperature

variations to maintain the maximum power dissipation capability. Mounting torque to avoid package damage

is 8 in-lbs (0.90 N-m). If a spring clip is used, a clip force of 8 to 30 pounds (35 to 130 N) is recommended to

be applied to the center of the package. The clip should be round or smooth in the contact area to avoid

concentrating the load on a small point of the plastic body of the package. Another mounting option is to use

a pressure bar method which can achieve a greater mounting force with a greater contact area.

For additional applications information regarding mounting and pulse handling see the Caddock

Applications Notes at caddock.com or contact Applications Engineering.

* Derating Using Case Temperature (TC):

Derating Curve

MP821

MP820

Model

No.

Comments

Integral Metal Mounting Surface

in Molded Package

MP850

Integral Metal Mounting Surface

in Molded Package

MP825

Metal Mounting Tab

TO-220 Style

Package

TO-220 Style

TO-126 Style

0.020 Ω

9.99 Ω

10.0 Ω

10.0 K

Min.

Max.

Resistance

0.20 Ω

10.0 K

0.020 Ω

10.0 K

20 Watts

Power

Rating

50 Watts

25 Watts

Max.

Voltage

Power

Limited

300

Thermal Resistance

Film (J) to Case (C)

7.50°C/Watt

5.00°C/Watt

2.50°C/Watt

7.50°C/Watt

175°C

Figure 1

Dimensions

Figure 3

Figure 2

Max. Temp.

MAX

175°C

150°C

.030 ±.004

(.76 ± .10)

.023 ± .004

(.58 ±.10)

.200 ±.010

(5.08 ±.26)

.450 ±.050

(11.43 ±1.27)

.115 ±.010

(2.92 ±.26)

MP825

0.10 Ω

.110 ±.010

(2.79 ±.26)

.053 ± .007

(1.35 ± .18)

.058 ±.007

(1.47 ±.18)

.320 ±.010

(8.12 ±.26)

.094 ±.004

(2.39 ±.10) DIA.

.440 ±.010

(11.18 ±.26)

.080 ±.020

(2.03 ±.51)

Speciﬁcations:

Temperature Coefﬁcient:

TC referenced to +25°C, ΔR taken at TMAX

5.00 ohms and above, -20 to +50 ppm/°C

0.50 ohm to 4.99 ohms, -20 to +80 ppm/°C

0.050 ohm to 0.49 ohm, 0 to +200 ppm/°C

0.020 ohm to 0.049 ohm, 0 to +300 ppm/°C

Operating Temperature: -55°C to TMAX

Inductance: 10nH typical in series when mea-

sured at a point 0.2 inches from the resistor body.

DWV: The dielectric strength rating of 1500 VrmsAC

is based upon connections made between

terminals shorted and either the metal surface the

part is mounted to or a metal clip in contact with the

top surface of the part.

Insulation Resistance: 10,000 Megohms, min.

The resistor element is electrically isolated from

the mounting surface.

Load Stability: 2,000 hours at rated power.

ΔR ±(1.0 percent + 0.001 ohm) max. Power rating

dependent upon case temperature. See derating

curve.

Momentary Overload:

MP820, MP821, MP850: 2 times rated power with

applied voltage not to exceed 1.5 times maximum

continuous operating voltage for 5 seconds.

ΔR ±(0.3 percent + 0.001 ohm) max.

MP825: 1.5 times rated power with applied

voltage not to exceed 1.5 times maximum

continuous operating voltage for 5 seconds.

ΔR ±(0.3 percent + 0.001 ohm) max.

Moisture Resistance: Mil-Std-202, Method 106.

ΔR ±(0.5 percent + 0.001 ohm) max.

Thermal Shock: Mil-Std-202, Method 107, Cond. F.

ΔR ±(0.3 percent + 0.001 ohm) max.

Shock: 100G, Mil-Std-202, Method 213, Cond. I.

ΔR ±(0.2 percent + 0.001 ohm) max.

Vibration, High Frequency: Mil-Std-202, Method

204, Cond. D. ΔR ±(0.2 percent + 0.001 ohm)

max.

Terminal Strength: Mil-Std-202, Method 211,

Cond. A (Pull Test) 5 lbs. ΔR ±(0.2 percent

+ 0.001 ohm) max.

Terminal Material: Solderable

Measurement Note: For these speciﬁcations,

resistance measurement shall be made at a point

0.2 inch (5.08 mm) from the resistor body.

100 175

100

POWER RATING, %

150

A - MP825 / MP850 Max. Temperature, TMax = 150°C

B - MP820 / MP821 Max. Temperature, TMax = 175°C

CASE TEMPERATURE, °C

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28_IL103.1004