Square D Digest 179

Molded Case Circuit Breakers

Selection Information

Class 500, 600, 800

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PowerPacT™ Q-Frame, Q4, LA, LH, L-Frame Molded Case Circuit Breakers

PowerPacT 250 A Q-Frame

PowerPacT 600 A L-Frame

400ALA/LH

Circuit Breaker Type Number of Poles Current Range (A) Interrupting Ratings UL/CSA/NOM AC Rating

QB 2, 3

QD 2, 3

QG 2, 3

LA

LH

LG 3, 4

LJ

LL

LR

2, 3

2, 3

3, 4

3, 4

3, 4

70–250 [42]

70–250 [42]

70–250 [42]

125–400

125–400

70–600

70–600

70–600

70–600

240Vac

10 — — — — — — — — — — —

25 — — — — — — — — — — —

65 — — — — — — — — — — —

42 30 30 22 22 10 — — — — — — —

65 35 35 25 25 50 20 — — — — — —

65 35 35 18 18 — 20 65 18 18 14 — — —

100

125 100 100

200 200 200 100 100

480Y/277 Vac

65 65 25 25 — — 65 65 25 — — —

480Vac

(kARMS) (50/60Hz)

600Y/347 Vac

50 50 — 50

600Vac

250Vdc [43]

— —

UL/CSA/NOM DC Ratings

500Vdc [44][43]

220/240 Vac 380/415 Vac 440/480 Vac 500/525 Vac

10/5 10/5

10/5 10/5

10/5 10/5

100

125 100 100

150 125 125

IEC AC Rating (kARMS) (50/60Hz) Icu/lcs [45]

20/5 [46]

20/5 [46]

50 — — —

75 20 — —

690Vac 250Vdc 500Vdc

IEC DC Ratings

Special Ratings CCC

—

—

—

—

—

X X X X X X X X X X X X X X X X X X

X X X X X X X X X X X X X X X X X X

X X X X X X X X X X X X X X X X X X

X X X X X X X X X X X X X X X X X X

HACR (2P, 3P)

X

X

X

X

X

FCC

— — —

— — —

— — —

— — —

— — —

CE

UKCA

Connections/Terminations UnitMount

X X

X X

X X

X X X

X X X

I-Line™

Rear Connection

— — — — — — — — —

— — — — — — — — —

— — — — — — — — —

Drawout

—

—

Optional Lugs

X

X

Accessories and Modifications Shunt Trip

X X X X X X

X X X X X X

Undervoltage Trip Auxiliary Switches Alarm Switch Motor Operator Handle Operators

Mechanical Interlocks (3P) Handle Padlock Attachment Cylinder Lock (3P [48] ) Optional GF Protection [49]

X [47]

X [47]

X X

X X

X X

X X

X X

— —

— —

— —

—

—

—

—

—

—

X

X

X

X

Trip System Type

Thermal-magnetic

X

X

X

X X

X X X

—

—

—

—

Instantaneous-only (MCP)

—

— — —

— — —

X X X

X

X X X

X X X

Molded Case Switch (Automatic)

X

— —

—

Electronic

—

—

X

Product Dimensions Dimensions (3P Unit Mount) in. (mm)

Height Width Depth

6.47 (164) 4.5 (114) 3.93 (100)

11 (279) 6 (152)

13.38 (340) 5.51 (140) 4.33 (110)

5.84 (148)

Enclosures (page 7-84–page 7-86) General Purpose (NEMA 1)

X X

X X

X X

X X X X

X X X X

— —

— —

— —

— —

Raintight (NEMA 3R) Dust-tight (NEMA 12)

X [50]

X [50]

X [50]

X [50]

— — —

— — —

— — —

Watertight (NEMA 4, 4X, 5) Explosion Proof (NEMA 7, 9)

— —

— —

— —

— —

—

—

page / Supplemental Section9

Pages (Unit Mount) / (I-Line)

page 7-38 / Supplemental Section 9

page 7-40 / Supplemental Section 9

NOTE: All circuit breakers on this chart are certified to UL and CSA standards unless otherwise noted.

[42] I-Line Q-frame circuit breakers are available 70–225 A only. 250 A Q-frame unit-mount circuit breakers are limited to Cu conductors only. [43] Not available with electronic trip units [44] Ungrounded UPS systems only. See page 7-47. Special DC J-Frame only. [45] Dual UL and IEC ratings and CE markings on circuit breakers. For additional IEC ratings, see the Supplemental Digest, Section 10. [46] For additional IEC ratings, see the Supplemental Digest Section 10. [47] Requires circuit breaker with WB suffix . [48] Factory-installed option only. [49] Requires factory-installed “G” shunt trip and 3P module. [50] Enclosure rating 1, 3R, 5 and 12.,

CIRCUIT BREAKERS

7 MINIATURE AND MOLDED CASE

7-7

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