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AIRPAX / SENSATA M3901903239 Magnetic Circuit Breaker

The AIRPAX / SENSATA M39019/03-239 is a magnetic circuit breaker designed for low-power applications requiring reliable circuit protection. It's a sealed, trip-free two-pole device with voltage and frequency ratings of 50V DC and 240V AC at 60Hz and 400Hz. The circuit breaker's performance characteristics, including current rating, time delay, and resistance/impedance, vary based on the dash number, as detailed in Table I. It is commonly used in military and industrial applications where robust circuit protection is essential. The part number includes a dash number that determines specific electrical characteristics.

Authorized Distributors
Source:DigiKey
Part No:M39019/03-239
Stock:0
Inv Date:06-09-2026
Price: Unit price: $1530.24
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Part No:M39019/03-239
Stock:0
Inv Date:06-09-2026
Price: Unit price: $1530.23
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Part No:M39019/03-239
Stock:0
Inv Date:06-09-2026
Price: Unit price: $2167.78
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Part No:M39019/03-239
Stock:11
Inv Date:06-09-2026
Price: Unit price: $995.77
Buy/RFQ:
Part No:M39019/03-239
Stock:11
Inv Date:06-09-2026
Price: Unit price: $995.77
Buy/RFQ:

AIRPAX / SENSATA M3901903239 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: May appear on 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
  • threaded_inserts_height: Exceed height of bushing by .005 to .015 (0.13 mm to 0.38 mm)

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Frequently Asked Questions

Where can I buy AIRPAX / SENSATA M3901903239?

You can click on the BUY or RFQ button to purchase M3901903239 from an authorized AIRPAX / SENSATA distributor.

How do I troubleshoot issues or seek technical support for part M3901903239?

You can download the M3901903239 datasheet or visit the AIRPAX / SENSATA website for support.

Who is the manufacturer of M3901903239?

AIRPAX / SENSATA

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