Molded Case Circuit Breakers

Class 500, 600, 800

Q4 and L-Frame Molded Case Circuit Breakers

 

400 A L-Frame

 

Circuit Breaker Type

Q4

LA

LH

Number of Poles

2, 3

2, 3

2, 3

Current Range

250–400

125–400

125–400

Interrupting Ratings

UL/CSA/NOM

Rating

(kA RMS)

(50/60 Hz)

240 Vac

25

42

65

480Y/277 Vac

30

35

480 Vac

30

35

600Y/347 Vac

22

25

600 Vac

22

25

DC Ratings

250 Vdc [1]

10

50

500 Vdc [2][1]

20

IEC Rating

(kA RMS)

Icu/lcs [3]

240 Vac

415 Vac

20/5

20/5

IEC 50/60 Hz

For additional IEC ratings, see the Supplemental Digest Section 10.

Special Ratings

 

CCC

 

Fed. Specs W-C-375B/GEN

X

X

X

 

HACR (2P, 3P)

X

X

Connections/Terminations

 

Unit Mount

X

X

X

 

I-Line™

X

X

X

 

Rear Connection

X

X

X

 

Drawout

 

Optional Lugs

X

X

X

Accessories and Modifications

 

Shunt Trip

X

X

X

 

Undervoltage Trip

X

X

X

 

Auxiliary Switches

X

X

X

 

Alarm Switch

X

X

X

 

Motor Operator

X

X

X

 

Handle Operators

X

X

X

 

Mechanical Interlocks (3P)

X [4]

X [4]

 

Handle Padlock Attachment

X

X

X

 

Cylinder Lock (3P) [1]

X

X

X

 

Optional GF Protection [5]

Trip System Type

 

Thermal-magnetic

X

X

X

 

Instantaneous-only (MCP)

X

X

 

Molded Case Switch (Automatic)

X

 

Electronic

Enclosures (Miniature and Molded Case Circuit Breaker DimensionsCircuit Breaker Enclosures)

 

General Purpose (NEMA 1)

X

X

X

 

Raintight (NEMA 3R)

X

X

X

 

Dust-tight (NEMA 12)

X

X

X

 

Watertight (NEMA 4, 4X, 5)

X

X

X

 

Explosion Proof (NEMA 7, 9)

Dimensions
(3P Unit Mount)

in. (mm)

Height

11 (279)

Width

6 (152)

Depth

5.84 (148)

Pages (Unit Mount)/(I-Line)

Supplemental Digest Section 3 / Digest Section 9

note

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

Footnotes

  1. Factory-installed option only.
  2. Ungrounded UPS systems only. See 500 Vdc Circuit Breakers.
  3. Dual UL and IEC ratings and CE markings on circuit breakers. For additional IEC ratings, see the Supplemental Digest, Section 10.
  4. Requires circuit breaker with WB suffix .
  5. Requires factory-installed “G” Shunt trip and 3P module.

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