EXT 500 SERIES
Circut Breakers
Introduction
Sensata Technologies’ EXT 500 Series of circuit breakers are designed for wiring harness protection in 12 Volt automotive applications. The device
protects circuits which occasionally experience momentary overloads and applications where selfresetting devices are preferred. The EXT 500 issensitive to both over-current and over-temperature fault conditions. The unique arrangement of two opposing bimetallic elements results in a device
that is insensitive to momentary overloads.
Sensata Technologies is an ISO and TS registered company providing world class quality products.

Features• SAE Type 1 (cycling)• Multiple bimetallic resistivities available• Metal Encased• Multiple terminal configurations available• Ambient compensatedBenefits• Can be mounted in the fuse block or elsewhere in the wiring harness• Protected from abuse and contamination of the contact surface• Meets longer life cycle requirements

SPECIFICATIONSNormal Operating Voltage

12 Volts DC

Typical Voltage Drop at
Operating Temperature

200 mV Max

Typical Ambient Temperature Range-40ºC to 85ºC

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Curves
These curves are to be used only as a guide in selecting a protector for a particular application. Factors such as distance from the heat source andthe method of mounting should be considered in selecting a protector. Final trip times are dependent upon terminal configuration and mounting in theapplication.

1000
800
600
400

Typical
EXT 500
Trip Time Curveat 25ºC

Trip Time in Seconds

200
100
80
60
40
20
10864
20Rated200% Rated
Current
Current
135% Rated
Current

Test Current

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DIMENSIONS
Dimensions in mm [Inch]EXT 507 Series

EXT 509 Series

EXT 515 Series

17.8(.70)
7.3 (.29)
4.45 (.175)
5.4 (.21)
25.1 (.99)
9.9(.39)11.0(.43)

18.7 (.74)
6.6 (.26)
3.8 (.15)
2.8 (.11)

5.2 (.20)
4.0 (.16)

19.0 (.75)

7.8 (.31)

25.1 (.99)

2.25 (.88)

Page 3

Revised 01/25/18

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CONTACT US
Americas+1 (508) 236-2551
electrical-protection-sales@sensata.com
Europe, Middle East & Africa+31743578156
info-sse@list.sensata.comAsia Pacificsales.isasia@list.sensata.com
China +86 (21) 2306 1500
Japan +81 (45) 277 7117
Korea +82 (31) 601 2004
India +91 (80) 67920890
Rest of Asia+886 (2) 27602006 ext 2808

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