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

RS stock no.:: 427-1127
Mfr. Part No.:: 440K-C21061
Manufacturer:: Allen Bradley Guardmaster

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

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Subtotal (1 unit)*

R 1 022,60

(exc. VAT)

R 1 175,99

(inc. VAT)

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In Stock

151 unit(s) ready to ship from another location
Plus 87 unit(s) shipping from 18 May 2026

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Units	Per unit
1 - 5	R 1,022.60
6 - 11	R 997.04
12 +	R 967.13

*price indicative

RS stock no.:: 427-1127
Mfr. Part No.:: 440K-C21061
Manufacturer:: Allen Bradley Guardmaster

Specification

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Allen Bradley Guardmaster
	Lock Style	Keyed
	Product Type	Safety Interlock Switch
	Lock Type	Interlock
	Actuator Included	Yes
	Safety Contacts	1 NO
	Housing Material	Fibreglass Reinforced Polybutylene Terephthalate
	Series	440K
	IP Rating	IP67
	Minimum Operating Temperature	-20°C
	Hazardous Area Certification	No
	Maximum Operating Temperature	80°C
	Standards/Approvals	EN 1088, EN 954-1, CE, ISO 14119, ANSI B11.19, NFPA 79, AS 4024.1, IEC/EN 60947-5-1, ISO 13849-1, IEC/EN 60204-1, TUV
	Width	31mm
	Depth	30.4mm
	Length	90.5mm
	Number of Head Directions	8

	Select all
	Brand Allen Bradley Guardmaster
	Lock Style Keyed
	Product Type Safety Interlock Switch
	Lock Type Interlock
	Actuator Included Yes
	Safety Contacts 1 NO
	Housing Material Fibreglass Reinforced Polybutylene Terephthalate
	Series 440K
	IP Rating IP67
	Minimum Operating Temperature -20°C
	Hazardous Area Certification No
	Maximum Operating Temperature 80°C
	Standards/Approvals EN 1088, EN 954-1, CE, ISO 14119, ANSI B11.19, NFPA 79, AS 4024.1, IEC/EN 60947-5-1, ISO 13849-1, IEC/EN 60204-1, TUV
	Width 31mm
	Depth 30.4mm
	Length 90.5mm
	Number of Head Directions 8

Exempt

Allen Bradley Guardmaster 440K-C21061 Cadet 3 Safety-Rated Interlock Switch

Safeguard personnel and keep your machine processes running smoothly with the 440K Cadet 3 Safety Interlock Switch by Allen Bradley Guardmaster.

This interlock switch has unique compact housing with fixing centres, offering ease-of-mounting. It can be operated by inserting a specially profile stainless-steel key which is permanently fixed to the guard door. The 440K safety switches provide cost-effective, secure electrical interlocking of the safety guard to the machine’s control circuit. This interlock device is highly suitable for use with hinged, sliding, and lift-off machine guards and is designed to be fitted at the leading edge of the door.

The 440K-C21061 has Break Before Make action (opens the first set of contacts before closing new contacts) and features 2NC Safety Contacts and 1NO Auxiliary. It is comprised of durable UL approved glass filled PBT. The actuator type is 90° and is made of stainless-steel. This switch has M16 conduit entry, a thermal current of 10A, and a rated insulation voltage of 500V. The operating temperature is –20 to +80 °C (-4…+176 °F). This versatile switch has dual entry slots and the head can be rotated to enable up to 8 actuator entry points. A blanking plug is also supplied for the unused key entry.

Features and Benefits:

• Simplified mounting due to industry standard fixing centers to DIN 50047

• Forced guided contacts

• Compact, space-saving housing is 90.5 x 31 x 30.4 mm (3.56 x 1.22 x 1.19 in.)

• 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

• Environmentally sealed to IP67 – no ingress of dust and can withstand temporary immersion in water

• Dual entry and rotational head, eight possible actuator entry points, easy to install

Certifications:

EN954-1

ISO13849-1

IEC/EN60204-1

NFPA79

EN1088

ISO14119

IEC/ EN60947-5-1

ANSI B11.19

AS4024.1

CE certified

TUV certified

CCC certified

UL approved

Note:

This device can be used with GuardLink, a new safety linking technology from Allen Bradley Guardmaster. GuardLink simplifies and reduces the connection time of the safety system, whilst providing real-time diagnostic information over Ethernet IP. This makes it simple to identify the location of the device that has tripped the system, thus reducing downtime, and improving the machines overall efficiency. For more details, please go to the GuardLink brochure.

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 applications, 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 safety standards. Allen Bradley Guardmaster switches are built to global standards to provide exceptional quality and reliability.