MIL-PRF-39019 circuit breakers provide precise and reliable power protection for aerospace and defense systems. This guide explains selection criteria, trip curves, and how to ensure long-term reliability in mission-critical applications.
A compact sensor project required multiple pressure-tight electrical feedthroughs under strict space, leakage and soldering constraints.
By combining standard single-pin glass feedthroughs with a carefully engineered assembly approach, a low-risk and scalable solution was achieved without custom multi-pin development.
Selecting a circuit breaker is not about rated current or cross-reference tables.
In industrial and military systems, reliable protection depends on trip curves, inrush behavior, and system-level dynamics. This article presents a practical engineering framework for using cross-reference correctly, avoiding common replacement mistakes, and selecting hydraulic-magnetic circuit breakers based on real operating conditions – not assumptions.
Circuit breaker selection in industrial and military power systems is a system-level decision, not a catalog exercise. Factors such as inrush current, trip characteristics, environmental conditions, and variant-level configuration play a critical role in preventing nuisance tripping and ensuring reliable operation in harsh environments.
Why does a circuit breaker work perfectly in the lab but fail in the field?
The answer is not a defect — it is physics.
Most false trips are caused by inrush current, DC ripple, temperature and vibration.
AIRPAX hydraulic-magnetic circuit breakers are designed to ignore short electrical transients and respond only to real overloads, making them the preferred choice for military, medical, and mission-critical power systems.
The Auxiliary Switch is the feedback link between your breaker and control system — indicating ON, OFF, or TRIPPED status in real time.
Built into Airpax™ magnetic circuit breakers and distributed in Israel by Amironic Ltd., it provides accurate isolation between power and control circuits, enabling remote monitoring, fault detection, and safety interlocks in industrial, military, and medical systems.
A Trip Coil (Shunt Trip Module) transforms a standard thermal-magnetic circuit breaker into a smart, remotely controlled protection device.
By applying a short control-voltage pulse, the coil activates the breaker’s trip mechanism — enabling remote shutdown, E-STOP functionality, or automated system protection.
The result is a compact, intelligent solution that combines relay control, overload protection, and remote disconnection in a single unit.
Represented in Israel by Amironic Ltd, official distributor of Sensata / Airpax.
MIL-PRF-39019 and MIL-PRF-55629 set the standard for military-grade hydraulic-magnetic circuit breakers. 39019 is built for extreme environments—shock, vibration, salt, and heat—while 55629 offers a cost-effective option for general military use. Amironic, representing Sensata Airpax, delivers both solutions with expert local support.
We are pleased to announce the release of the LineGard™ PGFM Series to our global distribution network. The LineGard™ PGFM product family provides ELCI (equipment leakage) ground fault sensing and operates in tandem with the Airpax™ LEL series, UL 489 listed circuit breaker, with shunt trip and auxiliary switch.
Amironic, representing Sensata Airpax in Israel, is proud to introduce the ICLR/ICLRH/ICLMR/ICLMHR series, a game-changer in power management, offering unparalleled remote control and performance capabilities. Here’s why you should consider integrating it into your system.
