Cutler Hammer, Div of Eaton Corp WMZ Selection Guide

UL 489 DIN Rail Miniature Circuit Breakers

WMZ Circuit Breakers

PRODUCT OVERVIEW

Tripping Characteristics

Eaton WMZ branch circuit breakers are available with “C” and
“D” tripping characteristics.

C-curve devices are suitable for application where medium levels
of inrush current are expected. Applications include small trans­formers, lighting, pilot devices, control circuits and coils. C-curve
devices provide a medium magnetic trip point.

D-curve devices are suitable for applications where high levels
of inrush current are expected. The high magnetic trip point
prevents nuisance tripping in high inductive applications such as
motors, transformers and power supplies.

Eaton WMZ devices are current limiting, which means they
interrupt fault currents within one half cycle of the fault. Current
limiting devices offer superior protection by reducing peak
let-through current and energy.

tripping characteristic
acc. to UL 489

a

conventional non-tripping
current

= 1.0 IN (T=40°)

I

nt

b

conventional tripping current

= 1.35 IN: t < 1 h (T=25°)

I

t

c

2.0 IN: t = 12 – 120 s (T=25°)

instantaneous tripping
acc. to IEC 60898-1

d

type C: 5 IN: t > 0.1 s
10 I

e

type D: 10 IN: t > 0.1 s
20 I

: t < 0.1 s

N

: t < 0.1 s

N

Device Printing on Front and Side

Installation options

These branch circuit breakers are available in two terminal
configurations: standard box terminals that accept multiple
conductors and ring-tongue terminals, ideally suited to demanding
requirements of the semi-conductor industry. All breakers mount
on standard 35 mm DIN rail. Bus connectors and feeder terminal
facilitate mounting and wiring of multiple miniature circuit breaker
arrays in control panel assemblies. These circuit breakers can also
be reverse feed.

Conductor
Type

Breaker Status
Indicator

Calibration
Temperature
UL/CSA

Rated Current

Product Overview

Catalog Numbering System

Breaker Family

WMZ = WMZ UL

Circuit Breaker

a

Limited curve and ampere offerings.

b

125 Vdc for 1-Pole, 250 Vdc for 2-pole in series.

c

Not offered for Type WMZD.

T = 10 kAIC
H = 14 kAIC
D = 10 kAIC/DC

Breaker Type

a

ab

Number of Poles

1 = 1-Pole
2 = 2-Pole
3 = 3-Pole

c

Rated Voltage
UL/CSA

WMZ T 1 C 16 T

Protective Curve

C = C Curve (5–10X In)
D = D Curve (10–20X In)

c

Ampere Rating

X0 = 0.5 Amps
01 = 1 Amps
X1 = 1.5 Amps
02 = 2 Amps
03 = 3 Amps
04 = 4 Amps
05 = 5 Amps
06 = 6 Amps
07 = 7 Amps
08 = 8 Amps

10 = 10 Amps
13 = 13 Amps
15 = 15 Amps
16 = 16 Amps
20 = 20 Amps
25 = 25 Amps
30 = 30 Amps
32 = 32 Amps
40 = 40 Amps

Catalog Number

Terminal

T = Ring Terminals
[blank] = Standard

Box Terminals

eaton corporation UL 489 DIN Rail Miniature Circuit Breakers

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