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Time Mark A257BM 3-Phase Monitor Relay

The 3-phase monitor relay is engineered for precise detection of phase loss, reversal, and low voltage in industrial power systems. With a coil voltage of 480 VAC, it features a solid-state sensing circuit and a relay capable of handling up to 10 amps. Mounted easily in an 8-pin socket, it ensures reliable protection in three-phase motor control and power distribution applications. The device includes manual and automatic reset options, green and red indicators for normal and trip states, and meets UL Recognized and CSA standards for safety and performance. Ideal for ensuring system reliability and preventing damage due to power irregularities.

Authorized Distributors
Part No:A257BM
Stock:3
Inv Date:06-11-2026
Price: Unit price: $170.45
Buy/RFQ:

Time Mark A257BM 3-Phase Monitor Relay Specifications:

  • Coil Voltage: 480 VAC
  • Contact Configuration: Single pole double throw (SPDT, 1 Form C)
  • Contact Current: Up to 10 amps
  • Mounting: Plug-in 8-pin octal socket, UL Recognized, CSA Certified
  • Operation: Automatic or manual reset options
  • Indicators: Green (NORM), Red (TRIP)
  • Enclosure Material: ABS plastic
  • Dimensions: Approx. 1.75 inches (tolerance +0.06 inches)
  • Power Consumption: 0.75W to 4.7W depending on model
  • Environmental: Humidity tolerance 97%, suitable for industrial environments
  • Standards: UL Recognized, CSA Certified
  • Response Time: 50 milliseconds
  • Transient Protection: 2500 VAC for 10 milliseconds

Buy the Time Mark Series 3-Phase Monitor Relay: A257BM

Ensure your industrial power systems operate reliably and safely with the Time Mark Series 3-Phase Monitor Relay. Featuring a 480 VAC coil, SPDT contacts with up to 10 amps capacity, and both manual and automatic reset options, this device provides critical protection against phase loss, voltage irregularities, and reversal. Easy to install using a UL-recognized 8-pin socket, it meets safety standards and offers indicators for system status. Perfect for protecting motors and power distribution networks, buy online today for peace of mind and system integrity.

Buy Time Mark A257BM 3-phase monitor relay now and experience unmatched reliability and performance in industrial power protection.

Frequently Asked Questions

Where can I buy Time Mark A257BM?

You can click on the BUY or RFQ button to purchase A257BM from an authorized Time Mark distributor.

How do I troubleshoot issues or seek technical support for part A257BM?

You can download the A257BM datasheet or visit the Time Mark website for support.

Who is the manufacturer of A257BM?

Time Mark

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