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AIRPAX / SENSATA M3901901250S Low-Power Trip-Free Circuit Breaker

The AIRPAX / SENSATA M39019/01-250S is a magnetic, low-power, sealed, trip-free, one-pole circuit breaker meeting MIL-PRF-39019 specifications. It's designed for use in a wide range of military and industrial applications requiring reliable circuit protection. The device incorporates a trip-free mechanism, ensuring automatic interruption of the circuit under fault conditions. Dimensions are detailed in Figure 1, and various dash numbers (e.g., 200, 300, 211) correspond to specific current ratings, time delays, and resistance/impedance characteristics as outlined in Table I. Marking can appear on any surface except the mounting surface. This circuit breaker provides a robust and dependable solution for protecting sensitive electronic equipment.

Authorized Distributors
Part No:M39019/01-250S
Stock:0
Inv Date:06-10-2026
Price: Unit price: $961.06
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Part No:M39019/01-250S
Stock:0
Inv Date:06-09-2026
Price: Unit price: $984.84
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Part No:M39019/01-250S
Stock:1
Inv Date:06-09-2026
Price: Unit price: $907.68
Buy/RFQ:
Part No:M39019/01-250S
Stock:1
Inv Date:06-09-2026
Price: Unit price: $907.68
Buy/RFQ:

AIRPAX / SENSATA M3901901250S Low-Power Trip-Free Circuit Breaker Specifications:

  • voltage_and_frequency_rating: 50 V dc, maximum and 240 V ac, maximum at 60 Hz and 400 Hz
  • high_inrush: 800 percent at 60 Hz and dc, 1,400 percent at 400 Hz
  • current_rating: See table I
  • time_delay: See table I
  • resistance_or_impedance: See table I
  • weight: Approximately 50 grams
  • hex_mounting_nut_thread: .375-32 UNEF-2B thread, .093 ±.005 (2.36 mm ±0.13 mm) thick or equivalent MS25082-20, -B20
  • internal_tooth_lockwasher: .507/.493 O.D., .392/.382 I.D., .025 ±.005 (0.64 mm ±0.13mm) thick, stainless steel or equivalent MS35333-134
  • effective_bushing_thread_length: .280 (7.11 mm) minimum
  • marking_location: Any surface except the mounting surface
  • lock_ring_requirement: Not required if on-off plate has locking tab
  • numerical_marking: Optional on circuit diagram
  • terminal_screw: MS35265-26 or equivalent

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Frequently Asked Questions

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How do I troubleshoot issues or seek technical support for part M3901901250S?

You can download the M3901901250S datasheet or visit the AIRPAX / SENSATA website for support.

Who is the manufacturer of M3901901250S?

AIRPAX / SENSATA

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