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AIRPAX / SENSATA M3901904251 Magnetic Circuit Breaker

The AIRPAX / SENSATA M39019/04-251 is a critical component in electrical systems requiring robust overcurrent protection. Designed to meet stringent military specifications, this circuit breaker provides reliable performance in demanding environments. Its sealed construction ensures protection against contaminants, while the trip-free mechanism enhances safety. The auxiliary contacts allow for remote monitoring and control, making it suitable for a wide range of applications including aerospace, defense, and industrial automation. The device is characterized by its compact size and ability to interrupt circuits up to a specified current rating, contributing to system safety and reliability.

Authorized Distributors
Source:Newark
Part No:M39019/04-251
Stock:1
Inv Date:06-09-2026
Price: Unit price: $1684.9
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Source:DigiKey
Part No:M39019/04-251
Stock:0
Inv Date:06-09-2026
Price: Unit price: $1635.83
Buy/RFQ:
Part No:M39019/04-251
Stock:0
Inv Date:06-10-2026
Price: Unit price: $1635.83
Buy/RFQ:
Part No:M39019/04-251
Stock:0
Inv Date:06-09-2026
Price: Unit price: $1668.55
Buy/RFQ:
Part No:M39019/04-251
Stock:7
Inv Date:06-09-2026
Price: Unit price: $1060.5
Buy/RFQ:
Part No:M39019/04-251
Stock:7
Inv Date:06-09-2026
Price: Unit price: $1060.5
Buy/RFQ:

AIRPAX / SENSATA M3901904251 Magnetic 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 100 grams
  • hex_mounting_nut: .375-32 UNEF-2B thread, .093 ±.005 (2.36 mm ±0.13 mm) thick or equivalent MS250820, -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
  • sealscrew: .138-32 UNC-2A x .312 (7.92 mm) long, stainless steel number 18-8 (type 347) MS35265-25 or equivalent with appropriate O-rings
  • panel_screws_usage: Enhances circuit breaker shock and vibration characteristics
  • threaded_inserts_height: Exceed height of bushing by .005 to .015 (0.13 mm to 0.38 mm)
  • auxiliary_contact_terminals: Located on the back side of the circuit breaker, accommodating two number 20 AWG wires

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Frequently Asked Questions

Where can I buy AIRPAX / SENSATA M3901904251?

You can click on the BUY or RFQ button to purchase M3901904251 from an authorized AIRPAX / SENSATA distributor.

How do I troubleshoot issues or seek technical support for part M3901904251?

You can download the M3901904251 datasheet or visit the AIRPAX / SENSATA website for support.

Who is the manufacturer of M3901904251?

AIRPAX / SENSATA

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