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Commercial Breakers:
    Circuit Breaker
1–35 Amp
2EP Series
    Circuit Breaker
2–40 Amp
C Series
    Circuit Breaker
12.5–60 Amp
7851, 7854
    Circuit Breakers
35–150 Amp
F Series
    Circuit Breakers
35–150 Amp
    Circuit Breaker
35–150 Amp
S Series
    Circuit Breaker
Precision Breakers:
    Circuit Breaker
2–35 Amp
PS series
    Circuit Breaker
2–40 Amp
Small Frame P
    Circuit Breakers
    Circuit Breaker
35–150 Amp
Large Frame P
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Site Updated February 16, 2018

* * * Sensata > Products > Klixon Brand > Circuit Breakers > Thermal >

Klixon® 9115 Series Thermal Circuit Breakers
15 to 30 Amp, Precision, Ignition Protected, Waterproof

Overview Data Sheet (PDF) Request Pricing or Info

13 - 30 amps
Precision thermal circuit breaker
Suitable for harsh conditions
Ignition protected
Waterproof: meets the requirements of MIL-E-13856
Meets requirements of commercial item description A-A-55571 for all federal agencies
Reliable performance: utilizes the accepted snap–acting Klixon disc
Maximum cable efficiency: calibration and thermal disc allow maximum usage of wiring capacity

Using a bimetal, snap acting disc as the sensing and actuating element, the Klixon small frame P series thermal circuit breaker provides trouble-free over-current protection for harsh environments. Similar in construction to the C series device, the P is used in applications such as military vehicles and equipment where more precise ultimate trip characteristics are required.

Available in two configurations:
9115-5: Automatic reset, sealed construction, molded-in electrical terminals, rubber connectors (shells)
9115-6: Manual reset, sealed construction, molded-in electrical terminals, rubber connectors (shells)


At 25°C (77°F) hold 115% and trip 138%
High Potential Test
1000 volts rms — 60Hz for 1 minute
Vibration Resistance
1055 cps 1.52 (.060") excursion for 3 hours
Shock Resistance
100G, 30 times per MIL-STD-202
Corrosion Resistance
100 hours per MIL-STD-202
Fungi Resistance
Per specification MIL-F-13927
Per specification MIL-STD-1184
Per specification MIL-STD-810
Approximate Weight
6.3 grams (2.25oz)


Completely waterproof electrical systems of ordinance vehicles
Mobile military ground equipment, including trucks, tractors, graders, earth movers, fuel units and amphibious, as well as commercial, vehicles

General Envelope Dimensions
Nominal dimensions provided for reference only.

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Klixon 9115

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Trip Curve
Approximate Time — Current Characteristics at 77°F (25°C)

Trip Curve Diagram

Derating Curve
Approximate Effect of Ambient Temperature on Ultimate Trip

Diagram: Approximate effect of ambient temperature on ultimate trip
Performance characteristics are based on room temperature (77°F). Consult derating curve at left for ambient temperatures significantly higher or lower than standard room temperature.

Example: At 77°F the device is calibrated to hold at 110% of rated current (1) and trip at 138% of rated current (2). At 140°F, the same device will hold at approximately 92% of rated current (3), and trip at approximately 120% of rated current (4).
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