PTCSS12T081DTX - Vishay / BC Components

www.vishay.com For technical questions, contact: nlr@vishay.com Document Number: 29012

60 Revision: 08-Jun-09

2381 671 911../PTCSL..T....BE

Vishay BCcomponents

PTC Thermistors, Mini Radial Leaded

for Over-Temperature Protection

FEATURES

•Well-defined protection temperature levels

•Fast reaction time (< 15 s in still air)

•Accurate resistance for ease of circuit design

•Excellent long term behavior (< 1 °C or 5 % after

1000 h at Tn + 15 °C)

•Wide range of protection temperatures (70 °C to

150 °C)

•No need to reset supply after overtemperature switch

•Small size and rugged

•Coated leaded and naked devices available

•Compliant to RoHS directive 2002/95/EC and in

accordance to WEEE 2002/96/EC

APPLICATIONS

Over-temperature protection and control in:

•Industrial electronics

•Power supplies

•Electronic data processing

•Motor protection

DESCRIPTION

These directly heated thermistors have a positive

temperature coefficient and are primarily intended for

sensing.

QUICK REFERENCE DATA

PARAMETER VALUE UNIT

Maximum resistance at 25 °C 100 Ω

Minimum resistance at (Tn+ 15) °C 4000 Ω

Maximum voltage 30 V

Temperature range - 20 to (Tn+ 15) °C

Weight:

91102 to 91114 ≈ 0.08 g

91152 to 91164 ≈ 0.11 g

Climatic category 25/125/56

NOMINAL WORKING TEMPERATURES AND ORDERING INFORMATION

NOMINAL WORKING TEMPERATURE CATALOG NUMBER 2381 671 .....

(°C)

RESISTANCE from

- 20 °C to Tn- 20 °C

(Ω)

RESISTANCE

at Tn- 5 °C

(Ω)

RESISTANCE

at Tn+ 5 °C

(kΩ)

LEADED DEVICE

COLOR CODE

NORMAL

LEADS LONG LEADS

70 30 to 250 50 to 570 0.570 to 50 91102 91152 Black

80 30 to 250 50 to 550 1.33 to 50 91103 91153 Brown

90 30 to 250 50 to 550 1.33 to 50 91104 91154 Red

100 30 to 250 50 to 550 1.33 to 50 91105 91155 Orange

110 30 to 250 50 to 550 1.33 to 50 91106 91156 Yellow

120 30 to 250 50 to 550 1.33 to 50 91107 91157 Green

130 30 to 250 50 to 550 1.33 to 50 91109 91159 Blue

140 30 to 250 50 to 550 1.33 to 50 91112 91162 Violet

150 30 to 250 50 to 550 1.33 to 50 91114 91164 Grey

Document Number: 29012 For technical questions, contact: nlr@vishay.com www.vishay.com

Revision: 08-Jun-09 61

2381 671 911../PTCSL..T....BE

PTC Thermistors, Mini Radial Leaded

for Over-Temperature Protection Vishay BCcomponents

COMPONENT OUTLINES DIMENSIONS in millimeters

ELECTRICAL CHARACTERISTICS

PARAMETER VALUES

Maximum resistance at 25 °C 100 Ω

Maximum resistance at (Tn- 5) °C See Nominal Working Temperatures and Ordering Information table

Minimum resistance at (Tn+ 15) °C 4000 Ω

Minimum resistance at (Tn+5)°C See Nominal Working Temperatures and Ordering Information table

Maximum voltage 30 V (AC or DC)

CATALOG NUMBERS AND PACKAGING

12NC SAP 12NC SAP SPQ

2381 671 91102 PTCSL20T071DBE 2381 671 91152 PTCSL40T071DBE 500

2381 671 91103 PTCSL20T081DBE 2381 671 91153 PTCSL40T081DBE 500

2381 671 91104 PTCSL20T091DBE 2381 671 91154 PTCSL40T091DBE 500

2381 671 91105 PTCSL20T101DBE 2381 671 91155 PTCSL40T101DBE 500

2381 671 91106 PTCSL20T111DBE 2381 671 91156 PTCSL40T111DBE 500

2381 671 91107 PTCSL20T121DBE 2381 671 91157 PTCSL40T121DBE 500

2381 671 91109 PTCSL20T131DBE 2381 671 91159 PTCSL40T131DBE 500

2381 671 91112 PTCSL20T141DBE 2381 671 91162 PTCSL40T141DBE 500

2381 671 91114 PTCSL20T151DBE 2381 671 91164 PTCSL40T151DBE 500

Ø 0.4

3.0 max.

2.54

20.0 ± 2

3.5 max.

7.0 max.

0.5 min.

Component outline for 91102 to 91114

Ø 0.4

3.0 max.

2.54

40.0 min.

3.5 max.

7.0 ma x.

0.5 mi n.

Component outline for 91152 to 91164

www.vishay.com For technical questions, contact: nlr@vishay.com Document Number: 29012

62 Revision: 08-Jun-09

2381 671 911../PTCSL..T....BE

Vishay BCcomponents PTC Thermistors, Mini Radial Leaded

for Over-Temperature Protection

TYPICAL RESISTANCE/TEMPERATURE

CHARACTERISTIC FOR 2381 671 91105/91106

and 91107

TYPICAL RESISTANCE/TEMPERATURE

CHARACTERISTIC FOR 2381 671 91102/91103

and 91104

TYPICAL RESISTANCE/TEMPERATURE

CHARACTERISTIC FOR 2381 671 91109

TYPICAL RESISTANCE/TEMPERATURE

CHARACTERISTIC FOR 2381 671 91112 and 91114

102

103

104

0 50 100 150 200 250

105

Tn = 120 °C

1.5 V (DC) max.

Tn = 110 °C

Tn = 100 °C

Resistance (Ω)

Temperature (°C)

102

103

104

0 50 100 150 200 250

106

105

= 90 °C

1.5 V (DC) max.

= 70 °C

= 80 °C

Resistance (Ω)

Temperature (°C)

102

103

104

0 50 100 150 200 250

106

105

1.5 V (DC) max.

Tn = 130 °C

Resistance (Ω)

Temperature (°C)

102

103

104

0 50 100 150 200 250

106

105

Tn = 140 °C

1.5 V (DC) max.

Tn = 150 °C

Resistance (Ω)

Temperature (°C)

Document Number: 29012 For technical questions, contact: nlr@vishay.com www.vishay.com

Revision: 08-Jun-09 63

2381 671 911../PTCSL..T....BE

PTC Thermistors, Mini Radial Leaded

for Over-Temperature Protection Vishay BCcomponents

APPLICATION SPECIFIC DATA

Negative Temperature Coefficient (NTC) thermistors are well known for temperature sensing. What is not well known, however,

is that Positive Temperature Coefficient (PTC) thermistors can be used for thermal protection. Although their operating principles

are similar, the applications are very different; whereas NTC thermistors sense and measure temperature over a defined range,

PTC thermistors switch at one particular temperature.

Just like thermostats they protect such equipment and components as motors, transformers, power transistors and thyristors

against overtemperature. A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more

accurately specified. It is also smaller and easier to design-in to electronic circuitry.

So how does it work? The PTC thermistor is mounted in thermal contact with the equipment to be protected, and connected into

the bridge arm of a comparator circuit, such as shown in Fig. 1. At normal temperature, the PTC thermistor resistance (Rp) is

lower than Rs (see Fig. 2), so the comparator's output voltage VO will be low. If an equipment overtemperature occurs, the PTC

thermistor will quickly heat up to its trigger or nominal reference temperature Tn, whereupon its resistance will increase to a value

much higher than Rs, causing VO to switch to a high level sufficient to activate an alarm, relay or power shutdown circuit.

APPLICATION EXAMPLES

As soon as one or more of the windings becomes too hot, the

motor is switched off.

+ θ

Trigger

temperature

T (°C)

Rp > Rs

(R1 = R2)

Rp < Rs

(R1 = R2)

PTC

thermistor

R2 + θ

Fig. 2 Typical switch characteristic

Fig. 1 Typical comparator circuit

Fig. 3 Temperature protection of electric motors

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Revision: 02-Oct-12 1Document Number: 91000

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definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council

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