MPN

Eaton ZB Overload Relay 1NO + 1NC, 0.6 → 1 A F.L.C, 1 A Contact Rating, 6 W, 500 Vac

RS Stock No.:: 493-0343
Mfr. Part No.:: 278435 ZB12-1
Brand:: Eaton

Eaton ZB Overload Relay 1NO + 1NC, 0.6 → 1 A F.L.C, 1 A Contact Rating, 6 W, 500 Vac

Subtotal (1 unit)*

£51.09

(exc. VAT)

£61.31

(inc. VAT)

FREE delivery for orders over £50.00

Temporarily out of stock

1 unit(s) shipping from 28 October 2025

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 +	£51.09

*price indicative

Alternative

This product is not currently available. Here is our alternative recommendation.

Eaton ZB Overload Relay 1NO + 1NC, 1 → 1.6 A F.L.C, 1.6 A Contact Rating, 6 W, 500 Vac

RS Stock No.: 493-0359

Each

£51.09

(exc. VAT)

£61.31

(inc. VAT)

RS Stock No.:: 493-0343
Mfr. Part No.:: 278435 ZB12-1
Brand:: Eaton

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Eaton
	FLC Motor Rating	0.6 → 1 A
	Contact Current Rating	1 A
	Series	ZB
	Mounting Style	Direct Contactor
	Power Rating	6 W
	Normal State Configuration	1NO + 1NC
	Reset Method	Automatic, Manual
	Terminal Type	Screw
	Number Of Auxiliary Contacts	2
	Width	45mm
	Length	88mm
	Depth	88mm
	Minimum Operating Temperature	-25°C
	Maximum Operating Temperature	+55°C
	Operating Temperature Range	-25 → +55 °C
	Control Voltage	500 Vac
	Contact Voltage Rating	690 V ac

	Select all
	Brand Eaton
	FLC Motor Rating 0.6 → 1 A
	Contact Current Rating 1 A
	Series ZB
	Mounting Style Direct Contactor
	Power Rating 6 W
	Normal State Configuration 1NO + 1NC
	Reset Method Automatic, Manual
	Terminal Type Screw
	Number Of Auxiliary Contacts 2
	Width 45mm
	Length 88mm
	Depth 88mm
	Minimum Operating Temperature -25°C
	Maximum Operating Temperature +55°C
	Operating Temperature Range -25 → +55 °C
	Control Voltage 500 Vac
	Contact Voltage Rating 690 V ac

Eaton Series ZB Overload Relay, 0.6 to 1A FLC Motor Rating, 1A Contact Current Rating - 278435 ZB12-1

This overload relay is designed for efficient motor protection. The unit features a compact form factor with dimensions of 88mm in length and depth, and 45mm in width. With a rated operational current range of 0.6 to 1 A, it is suitable for various automation and electrical applications, ensuring protective measures against overload conditions.

Features & Benefits

• Offers both automatic and manual reset methods for user convenience
• Configured with 1 normally open and 1 normally closed contact for versatile operation
• Designed to operate within a temperature range of -25 to +55 °C for varying environments
• Direct mounting style simplifies installation in control panels
• IP20 rated, providing protection against solid objects greater than 12mm

Applications

• Used with industrial machines to prevent motor burnout
• Ideal for HVAC systems requiring reliable motor protection
• Suitable for conveyor systems needing overload safety
• Used in electrical panels for protecting branch circuits
• Utilised in automation systems for enhanced operational safety

What is the significance of the trip-free release feature?

The trip-free release feature ensures that the relay does not automatically reset when overloaded, allowing continuous operation while safeguarding equipment against damage. This maintains circuit integrity and operational safety during fault conditions.

How does the overload relay help with phase-failure sensitivity?

This overload relay has built-in phase-failure sensitivity, ensuring that if one phase fails, the relay will detect it and disconnect the power supply to prevent equipment damage. This feature contributes to more reliable system performance.

What are the terminal capacity specifications for this relay?

The relay accommodates various terminal capacities, including flexible terminals with ferrules ranging from 0.75 to 2.5 mm² for control circuit cables. It also supports solid conductor terminals of 1 to 6 mm² for main cables, allowing flexible installation options.

Note

Eaton formerly known as Moeller

Be the first to know about our latest products and services

Join our mailing list today:

The personal information you provide to us when signing up to the mailing list will be processed in line with our privacy policy.