Supplementary Circuit Breaker

UL 1077 DIN Rail Supplementary Protectors
D Curve (10–20X In Current Rating)
Designed for Inductive Loads

Obsolete Eaton Part Number - WMZS2D00

0.5 Amperes

FAZ-D0.5/2 UL 1077 DIN Rail Supplementary Protectors - B Curve (3–5X In Current Rating) — Designed for Resistive or Slightly Inductive Loads

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FAZ-D0.5/2 Specifications PDF
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NOTE: In North America, these switches are UL recognized and CSA Certified as supplementary protection devices. Per the intent of NEC (National Electrical Code), Article 240, and CEC (Canadian Electrical Code), Part 1 C22.1, supplementary breakers cannot be used as a substitute for the branch circuit protective device. They can be used to provide overcurrent protection within an appliance or other electrical equipment where branch circuit overcurrent protection is already provided, or is not required.

NOTE: Option for single packaging on single-pole B, C and D curves only; add suffix SP when ordering.

FAZ UL 1077 DIN Rail Supplementary
Protectors Product Selection

Product Selection
FAZ D curve (10–20X In current rating)

  • - Designed for inductive loads
  • - Response time of instantaneous trip: 10–20X In current rating
  • - UL recognized and CSA Certified as supplementary protectors
  • - For international and domestic use (conform to IEC 60947-2)
  • - UL file number 177451

Suitable for applications where high levels of inrush current are expected. Instantaneous trip is 10–20X rating of device (In). The high magnetic trip point prevents nuisance tripping in high inductive applications such as motors, transformers and power supplies.

FAX B Curve Illustration

Product Overview
Optimum product quality, tested reliability and safety stand for best protection of personnel, installations and plant. Eaton’s FAZ-NA DIN rail mountable circuit breaker is designed for use in branch service applications.

Application Description

  • - Supplementary protection
  • - Control circuits
  • - Lighting
  • - Business equipment
  • - Appliances

Powerful offering for machine and system builders
The FAZ is available with B, C, D, K, S, and Z characteristics in accordance with UL 1077, CSA C22.2 No.235 and IEC 60947-2. These devices are CE marked.


UL 489 Certifications:


  • - Complete range of UL 1077 recognized DIN rail mounted miniature circuit breakers up to 63A current rating
  • - Standard ratings of 10 kAIC up to 277/480 Vac
  • - Current limiting design provides fast short-circuit interruption that reduces the let-through energy, which can damage the circuit
  • - Suitable for supplementary protection
  • - Thermal-magnetic overcurrent protection
  • - Six levels of short-circuit protection, categorized by B, C, D, K, S, and Z curves
  • - Trip-free design—breaker can not be defeated by holding the handle in the ON position
  • - Captive screws cannot be lost
  • - Fulfill UL 1077, CSA C22.2 No.235 and also IEC 60947-2 Standard
  • - Field-installable shunt trip and auxiliary switch subsequent mounting
  • - Module width of only 17.7 mm (per pole)
  • - Contact position indicator (red/green)
  • - Easy installation on DIN rail
  • - Possibility for sealing the toggle in ON or OFF position

FAZ-UL 1077 DIN Rail Supplementary Protectors

UL 489 Dimensions

FAZ-NA UL 489 Part Number Selection Guide

UL489 Part Number Selection Guide

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