MM351R050DIN

Inrush Current Limiters (ICL) Overview

The MM351R050DIN is a negative temperature coefficient (NTC) thermistor surge current limiter from the Vishay Ametherm MM35-DIN series. Designed for industrial power control applications, it features a 1 Ohm nominal resistance with a ±25% tolerance and a continuous current rating of 50 A at 680 VAC. The component utilizes dual DIN blade terminals for secure mounting within DIN rail blocks. It has a physical length of 35 mm and is constructed to suppress high inrush current surges in both single-phase and three-phase power systems.

Inrush Current Limiters (ICL) Feature Summary

• Dual DIN blade terminal configuration enables direct mounting into standard DIN rail blocks using only a screwdriver.
• Negative temperature coefficient characteristics provide effective suppression of high inrush current surges during power-up.
• Robust construction supports continuous operation in demanding industrial environments.

Inrush Current Limiters (ICL) Applications

• Industrial power supply units requiring surge protection
• Single-phase and three-phase power control boxes
• Equipment mounted on standard DIN rails

Inrush Current Limiters (ICL) Procurement Notes

Verify that the specific order matches the MM351R050DIN part number to ensure the inclusion of dual DIN blade terminals rather than radial leads. Confirm that the application voltage does not exceed the rated 680 VAC and that the steady-state current remains within the 50 A limit. Check datasheet specifications for thermal derating requirements under varying ambient conditions.

Inrush Current Limiters (ICL) Selection Notes

Select this component when DIN rail mounting convenience is required alongside high current handling capabilities. The 1 Ohm resistance value is suitable for limiting initial charging currents in capacitive loads. Ensure the enclosure allows for adequate heat dissipation, as NTC limiters operate by heating up during normal conduction. Compare against other MM35 variants if different resistance or current ratings are needed.

Inrush Current Limiters (ICL) Part Context

This device belongs to the MM35-DIN series of inrush current limiters manufactured by Vishay / Ametherm. The series is specifically engineered for integration into power distribution systems where space efficiency and reliable connection via DIN rail blocks are prioritized over traditional PCB or wire-wrapped mounting methods.

Inrush Current Limiters (ICL) Replacement Considerations

For equivalent functionality with DIN blade terminals, consider the MM350R280DIN for higher current capacity or the MM351R550 for alternative resistance values, though the latter uses flat leads. Verify that any substitute maintains the 680 VAC rating and compatible mechanical dimensions for the existing DIN block.