Circuit Breakers

Relays, Contactors & Circuit Breakers

INDUSTRIAL /// QUICK REFERENCE GUIDE INDUSTRIAL RELAYS

Potter & Brumfield W33

Thermal overload/trip free Operation

Optional indicator lamp

Optional auxiliary switch

Combines on/off switching and circuit

protection in a single unit

UL 1077, CSA

Potter & Brumfield W51

Thermal overload/trip free operation

Rocker actuated with switch

overload sensing

Optional indicator lamp

Combines power switching and circuit

protection in a single unit

Compact design

PCB termination options

UL1077, cUL, VDE, CCC

Potter & Brumfield W54

Thermal overload/trip free operation

Push to reset

Visual trip indication

Multiple termination options

UL 1077, UL 1500, cUL, VDE, CCC,

CSA. (>30A not UL1500 or CSA)

(>20A not VDE)

Typical applications

Generators, General Aviation,

Medical, Marine

Power Supplies, Lighting,

Surge Protection

Audio, pool and spa, appliances,

Industrial controls

Generators, General Aviation,

Medical, Marine

Power Supplies, Lighting,

Surge Protection

Audio, pool and spa, appliances,

Industrial controls

Generators, general aviation,

medical, marine

Power supplies, lighting, surge

protection

Audio, pool and spa, appliances,

Industrial controls

Operational Data

Type

Number of Poles

Circuit function

Ambient temperature (max.)

Terminal type

Mounting

Manual operation Actuator

Dimension L*W*H

Thermal

1-2

Series trip both poles; series trip 1

pole/switch only 1 pole; switch

only 2 poles

-20 to +65 °C

Standard quick connect 250in x

.032in and solder option

Snap-in

Rocker

43.8 x 24.9 x 48.0mm

Thermal

1

Series trip

0°C to + 60 °C for 10-20A models

0°C to + 50 °C for 5-8A models

Standard quick connect

250inx.032in/solder option/PCB

Snap-in, PCB

Rocker

21.8 x 15.2 x 32.0mm

Thermal

1

Series trip

0 to 60 °C

Standard quick connect

250inx.032in and #8-32 screw

3/8"-24, M11-1.0, M12-1.0

threaded bushing

Push-to-reset

31.0 x 14.6 x 35.0mm (W54)

22.6 x 14.6 x 29.2mm (W57)

Electrical Data

Dielectric strength

Insulation Resistance

Max Operating Voltages

Rated current

Interrupt capacity

Calibration

Resetable OverloadCapacity

Reset Time

2000Vrms

50VDC

250VAC

2A to 20A

1000A at 50VDC, 250VAC/60Hz

and 125/250VAC 400Hz; 1500A at

25/250VAC/60Hz

Will continuously carry 100% of

rating. May trip between 101% and

134%, but must trip at 135% of

rating within one hour at +25°C

150% for 5-8A models

Ten times rated current

1500VAC

100M Ω

50VDC

125/250VAC (model dependent)

5A to 20A

1,000 amps in accordance with UL

standard 1077

Will continuously carry 100% of

rating. May trip between 101% and

134%, but must trip at 135% of rating

within one hour at +25°C. 150% for

5-8A models

Ten times rated current. Switch

Endurance Cycling: Typically 6,000

operations at 100% of rating

60 Seconds

1500VAC

100MΩ

50VDC

250VAC

5A to 40A

1,000 amps in accordance with

UL standard 1077

Will continuously carry 100% of

rating. May trip between 101% and

134%, but must trip at 135% of

rating within one hour at +25°C

Ten times rated current.

60 Seconds

Accessories

Protective boot, knurl nut, hex

nut, lockwasher, nameplate

Link to datasheet

Potter & Brumfield W33

Potter & Brumfield W51

Potter & Brumfield W54

Key Features

PCB mount not applicable.

Visit

TE.com for more information

PCB mount not applicable.

Visit

TE.com for more information

PCB mount not applicable.

Visit

TE.com for more information

1) Recommended minimum load indication for contact material: AU and gold plated: 1mA at 6VDC; AgNi0.15 and AgNi90/10:

10mA at 12VDC: AgCdO and AgSnO

2: 100mA at 12VDC. Please contact technical support for detailed technical data.