Square D Digest 179

Miniature Circuit Breakers

Selection Information

Class 500, 600

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QO-GFI, QO-EPD, QOU, QOM Miniature Circuit Breakers QO Circuit Breakers QOU Circuit Breakers

QOM1 and QOM2 Main Circuit Breakers

QO-EPD QO-EPE QOB-EPD QOB-EPE

QO VHGFI QOB VHGFI

Plug-on

QO-GFI

—

—

—

Circuit Breaker Type

QOB-GFI

QOM1-VH QOM2-VH

Bolt-on

—

QOU

UnitMount

— — — — — — —

—

—

Number of Poles Current Range (A) Interrupting Ratings

1

2

3

1

1

2

3

1

2

3

2

2

15–30 15–60 15–50 15–30 15–30 15–60 15–50 10–100 10–125 10–100

50–125

100–225

120Vac

10

10

— 22

10

10

— 10 — 10

10 10

10 10

22 22 — — — — — — — — — — —

22 22 — — — — — — — — — — —

120/240 Vac 208Y/120 240Vac [10]

— 10

— — — 10

UL/CSA Rating (kARMS) (50/60Hz)

— — 10

— — — —

— — — — — — 10

— — 10

277Vac

—————————— —————————— —————————— — — — — — — — 5 [11] 5 [11] 5 [11] —————————— —————————— —————————— —————————— —————————— ——————————

480Y/277 Vac

48Vdc 60Vdc 65Vdc 125Vdc 250Vdc 500Vdc 240Vac 415Vac

DCRatings

IEC 60947-2 (50/60Hz) Icu Special Ratings CCC

X [12]

X [12]

— — — — — — — X [12]

—

—

Fed. Specs W-C-375B/GEN

X

—

— X

—

X

X

X

X

X

HACR [13]

Other Standard

NOM

—

NOM

—

—

Accessories and Modifications Shunt Trip

X [14]

X [14]

X [14]

— — — — — — — X [14]

— — — — —

Undervoltage Trip Auxiliary Switches

——————————

— — — —

X [14] X [14]

X [14] X [14]

X [14] X [14]

X X

X X

X X

X X

X X

X X

X X

Alarm Switch

Handle Operators

——————————

Handle Padlock Attachment

X

X

X

X

X

X

X

X

X

X

X

X

Trip System Type Thermal-magnetic Molded Case Switch

X

X

X

X

X

X

X

X

X

X X

X

X

— — — — — — — — X

—

—

Dimensions (1P Unit Mount)

5.60 (142) [15] 5.07 (129) [15]

Height

4.12 (103)

4.05 (103)

5.09 (129) [15]

Dimensions (1P Unit Mount) in. (mm)

0.75 (19) 2.92 (74) page7-11

0.75 (19) 2.92 (74) page7-18

5.00 (127) [15] 3.47 (88) [15]

Width Depth

3.60 (91) [15]

Pages

See Section 1

NOTE: All circuit breakers on this chart are UL Listed and CSA Certified unless otherwise noted.

CIRCUIT BREAKERS

[10] For information regarding 3Ø corner grounded systems see the Supplemental Digest, Section 3. [11] QOU is UL Listed for 60 Vdc per pole 80–100 A, 1P; 80–125 A, 2P; and 70–100 A, 3P. [12] 15–70 A 1P and 2P, 15–60 A 3P [13] HACR on QOU 1P and 3P 15–100 A, 2P 15–125 A; [14] Factory-installed option only. [15] QOM1 and QOM2 dimensions are for 2-pole unit.

7 MINIATURE AND MOLDED CASE

7-3

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