Sensata | Products: Klixon Small Frame P Series Thermal Circuit Breakers (PDA, PDM) by Sensata Technologies

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Site Updated 3 Dec. 2008

Sensata > Products > Controls > Circuit Breakers > Thermal >

Klixon^® Small Frame P Series: PDA and PDM

2 to 40 Amp Precision, Sealed, Ignition Protected Thermal Breakers

•	Ignition protected
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 Series is used in applications such as military vehicles and equipment where more precise ultimate trip characteristics are required. The P series is available in two configurations:
•	PDA: Sealed construction, automatic reset
•	PDM: Sealed construction, manual reset
Applications
•	Military vehicles and other equipment where precise ultimate trip characteristics are required
General Envelope Dimensions Nominal dimensions provided for reference only.

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

Dotted Lines: Small Frame P series PDA, PDM (10 amps and below)
Solid Lines: Small Frame P series PDA, PDM (above 10 amps)

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 100% of rated current (1) and trip at 135% of rated current (2). At 140°F, the same device will hold at approximately 78% of rated current (3), and trip at approximately 115% of rated current (4).

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