Square D Digest 179

NEMA and Definite Purpose Contactors and Starters

Selection Information

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Selection Information

Class

8539&8739

8903L & 8903S

8903

8910, 8911, 8965

8940

8941

Combination Devices

Definite Purpose non reversing contactors available as compact 1 or 2poleto40Aand2to4 pole to 90 A. Reversing and Starter Configurations also available.

Multipole electrically held and mechanically held contactors available in 30 A configurations to 12 poles and 800 A configurations to 3 poles.

NEMA Style AC Duplex Motor Controllers available as a combination starter orwithout disconnecting means.

Type S lighting contactors electrically held and mechanically held available with disconnect switches or PowerPact™ circuit breakers

Well-Guard Control™ Pumping Plant Panels available with disconnect switches or PowerPact™ circuit breakers.

16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS

Combination Magnetic Starters with PowerPact™ Circuit Breaker

Type of Product

8910: page 16-90 8911: page 16-93 8965: page 16-100

8539: page 16-52 8739: page 16-69

page16-94 page16-95

page16-75

page16-78

page16-96

Page

8539: 0–7 8739: 0–6

NEMASizes

N/A

N/A

N/A

1–7

1–4

Load Voltage

600 Vac Max.

600 Vac Max.

600 Vac Max.

600 Vac Max.

600 Vac Max.

600 Vac Max.

300 A (Disconnect) 600 A (Circuit Breaker)

20–40 A (Compact)

8539: 18–810 A 8739: 18–540 A 8539: 0.5–600 8739: 0.5–400

8903L to 30 A 8903S to 800 A

Current Ratings (Continuous)

27–810A

27–135A

20–90A

Horsepower Ratings (Maximum)

N/A

N/A

0.5–50

0.5–600

0.5–100

Melting Alloy Bimetallic (Size0–1) Solid State

N/A

N/A

Melting Alloy (8911)

Melting Alloy Bimetallic Solid State

Melting Alloy Bimetallic Solid State

Overload Relay

1, 3R, 4, 4X, 12/3R and Open

1, 4, 4X, 12/3R and Open

Enclosure Types

1, 4, 4X, 12/3R

1, 4, 4X, 12/3R

1

3R

UL File E152395 NKJH7 UL File E78427 NRNT UL File E16151 NRNT

UL E3190 NLDX2 CSA LR25490 Class 3211 04

UL/cUL 152395 NKJH UL File E152395 NKJH7

Approvals

CSALR584 Class 3211 04

CSA LR60905 Class 3231 01

cUL File E16151 NRNT

16-3

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