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NCS37021 - Self-Test Ground Fault Circuit Interrupter

General Description

Pin # Name Pin Description 1 CTG Ground Neutral current transformer stimulus 2 SCM Test input for SCR functionality 3 CTB Differential current transformer bias voltage 4 CTS Differential current input 5 CTO Differential current to voltage output 6 IDF Differential low pass filte

Key Features

  • Meets UL943 Self.
  • test GFCI Requirements.
  • 4.0.
  • 12 V Operation (120.
  • 480 V AC Mains with the Appropriate Series Impedance).
  • Wide Operating Temperature Range from 40°C to 95°C.
  • Low Quiescent Current.
  • Optimized Solenoid Deployment (Coil is not Energized Near the AC Mains Zero Crossings).
  • Power Supply Monitor that Verifies Full Diode Bridge Operation.
  • Tiered GF Trip Times that Increase Immunity to Noise.

📥 Download Datasheet

Datasheet Details

Part number NCS37021
Manufacturer onsemi
File Size 169.45 KB
Description Self-Test Ground Fault Circuit Interrupter
Datasheet download datasheet NCS37021 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Self-Test Ground Fault Circuit Interrupter (GFCI) NCS37021 The NCS37021 is a UL943 compliant signal processor for GFCI applications with self−test. The device integrates a flexible power supply (including a 12 V shunt, two 3.3 V internal series regulators and a 1.8 V internal regulator), differential fault, and grounded−neutral detection circuits. Self−test is monitored at start up and then every minute. Features • Meets UL943 Self−test GFCI Requirements • 4.