Allen Bradley Guardmaster 440K Safety Rated Interlock Switch, Keyed Actuator Included, Fibreglass Reinforced

RS Stock No.:: 483-3567
Mfr. Part No.:: 440K-E33040
Brand:: Allen Bradley Guardmaster

Allen Bradley Guardmaster 440K Safety Rated Interlock Switch, Keyed Actuator Included, Fibreglass Reinforced

Subtotal (1 unit)*

£34.39

(exc. VAT)

£41.27

(inc. VAT)

FREE delivery for orders over £60.00

In Stock

108 unit(s) ready to ship
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Plus 100 unit(s) shipping from 15 May 2026

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Units	Per unit
1 +	£34.39

*price indicative

RS Stock No.:: 483-3567
Mfr. Part No.:: 440K-E33040
Brand:: Allen Bradley Guardmaster

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Allen Bradley Guardmaster
	Product Type	Safety Rated Interlock Switch
	Lock Style	Keyed
	Lock Type	Interlock
	Actuator Included	Yes
	Safety Contacts	1 NO
	Housing Material	Fibreglass Reinforced Polybutylene Terephthalate
	Series	440K
	Contact AC Voltage	18V ac
	Minimum Operating Temperature	-20°C
	IP Rating	IP67
	Switch Contact Current	3mA
	Hazardous Area Certification	No
	Maximum Operating Temperature	80°C
	Depth	29mm
	Number of Head Directions	8
	Length	75mm
	Width	25mm
	Standards/Approvals	CE, EN
	Conduit Entry	M16

	Select all
	Brand Allen Bradley Guardmaster
	Product Type Safety Rated Interlock Switch
	Lock Style Keyed
	Lock Type Interlock
	Actuator Included Yes
	Safety Contacts 1 NO
	Housing Material Fibreglass Reinforced Polybutylene Terephthalate
	Series 440K
	Contact AC Voltage 18V ac
	Minimum Operating Temperature -20°C
	IP Rating IP67
	Switch Contact Current 3mA
	Hazardous Area Certification No
	Maximum Operating Temperature 80°C
	Depth 29mm
	Number of Head Directions 8
	Length 75mm
	Width 25mm
	Standards/Approvals CE, EN
	Conduit Entry M16

RoHS Status: Exempt

Allen Bradley Guardmaster 440K-E33040 Elf Miniature Safety-Rated Interlock Switch

For a safer and more efficient work environment give your machine guard, gate, or door an upgrade with the 440K Elf Miniature Safety-Rated Tongue Interlock Switch by Allen Bradley Guardmaster.

This space-saving, cost-effective safety switch is specifically designed for use with smaller machinery such as printers, copiers, and domestic machinery due to its unique miniature housing. It is the smallest in the industry at only 75mm x 25mm x 29mm and is designed to be fitted at the leading edge of hinge, sliding, and lift-off guards.

The 440K door interlocks provide reliable and secure electrical interlocking of the guard door to the machine’s control circuit. It can be operated by the insertion of a specially profiled key which is permanently fixed to the safety barrier. This switch has a conveniently rotatable head with dual entry slots, and can offer up to 8 different key entry points for optimal flexibility.

The 440K-E33040 has Break Before Make Action and 1NC/1NO Contacts. It has M16 conduit entry (or quick disconnect). It provides excellent durability as it is made of UL approved glass-filled PBT the actuator is stainless-steel. Actuator type is 90°. It has an operating temperature range of -20 to +80 °C (-4…+176 °F). This tongue interlock switch is environmentally sealed to IP67, ensuring that it is both water-tight and dust-tight.

Features and Benefits:

• Miniature size - the smallest interlock switch available

• Perfectly suited for use with small, lightweight guards, particularly useful for light duty sliding and small radii hinged machine guards (60mm or 2.36in) due to semi-flexible key

• Easy to install and rotatable head with dual entry allows up to 8 options for actuator entry position

• Forced guided contacts

• Environmentally sealed to IP67 – no ingress of dust and water-tight

Certifications:

EN954-1

ISO13849-1

IEC/EN60204-1

NFPA79, EN1088

ISO14119

IEC/ EN60947-5-1

ANSI B11.19

AS4024.1

IP67 rated

UL approved

CE certified

What is a Safety Interlock Switch?

A safety interlock switch is a device which keeps guard doors and gates securely locked to prevent access to areas where dangerous machinery may be in operation, minimalising the risk of injury to personnel and damage to machinery. They can also be used to monitor the status of the machine guard, and to ensure that machinery cannot start up or run while the guard door is open. They are often utilised in industrial settings, such as safeguarding factory production lines. They can vary in lock type, maximum current and voltage, and housing material. Safety-rated interlock switches are specifically designed to meet high machine safety standards. Allen Bradley Guardmaster switches are built to global standards to provide exceptional quality and reliability.