The DCNHR250QFA is a 900V DC normally open contactor relay with a resin housing for corrosion resistance in harsh automotive environments, designed for 250A continuous current and capable of switching up to 500A using 400MCM cable. It features a PWM coil operating at 9-36V DC to reduce holding power, polarized main contacts, and a mechanically linked normally open auxiliary contact rated for 2A at 24V DC. The relay has an IP67 rating for main contacts and IP54 for the PWM circuit, operates from -40°C to +85°C, and is RoHS compliant. It meets UL E47258 recognition and CE EN 60947-4-1, 2018 standards. Mounting is bottom-entry with bolted terminals requiring 8-12N·m torque for main terminals and 1.8-3.5N·m for coil terminals.
The DCNHR Series 450V High-Voltage DC Contactor Relay is normally open with a low-power coil in a corrosion-resistant housing for use in harsh vehicle environments. The contactor's permanent magnet helps to achieve a high-voltage DC cutoff.This DCNHR Series contactor relay (DCNHR250QFA) is for 250A contact switching. It includes an auxiliary contact and features polarized main contacts. Designed for 250 A contact switching Polarized main contacts Includes an auxiliary contact
| Littelfuse, Inc. | |
|---|---|
| Product Category | High Voltage Relays |
| Product Number | DCNHR250QFA |
| Product Name | 900V DC Max Normally Open SPST Contactor Relays with Resin Housing |
| DC Coil Voltage | 9 volts |
