Allen Bradley Guardmaster 440K Safety Interlock Switch, 2NC/1NO, Tongue Actuator Included, Metal
- RS Stock No.:
- 226-3174
- Mfr. Part No.:
- 440K-B04026
- Brand:
- Allen Bradley Guardmaster
Subtotal (1 unit)*
£160.47
(exc. VAT)
£192.56
(inc. VAT)
FREE delivery for orders over £50.00
Temporarily out of stock
- 26 unit(s) shipping from 24 October 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 1 + | £160.47 |
*price indicative
- RS Stock No.:
- 226-3174
- Mfr. Part No.:
- 440K-B04026
- 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 | |
| Lock Style | Tongue | |
| Normal State Configuration | 2NC/1NO | |
| Lock Type | Interlock | |
| Actuator Included | Yes | |
| Safety Contacts | 2NC | |
| Maximum AC Voltage | 600V | |
| Maximum DC Voltage | 600V | |
| Connection Type | M20 | |
| Housing Material | Metal | |
| Range | Centurion | |
| IP Rating | IP66 | |
| Number of Head Directions | 1 | |
| Series | 440K | |
| Auxiliary Contacts | 1NO | |
| Minimum Operating Temperature | -25°C | |
| Length | 64mm | |
| Depth | 98mm | |
| Maximum Current | 6A | |
| Maximum Operating Temperature | +80°C | |
| Width | 40.5mm | |
Select all | ||
|---|---|---|
Brand Allen Bradley Guardmaster | ||
Lock Style Tongue | ||
Normal State Configuration 2NC/1NO | ||
Lock Type Interlock | ||
Actuator Included Yes | ||
Safety Contacts 2NC | ||
Maximum AC Voltage 600V | ||
Maximum DC Voltage 600V | ||
Connection Type M20 | ||
Housing Material Metal | ||
Range Centurion | ||
IP Rating IP66 | ||
Number of Head Directions 1 | ||
Series 440K | ||
Auxiliary Contacts 1NO | ||
Minimum Operating Temperature -25°C | ||
Length 64mm | ||
Depth 98mm | ||
Maximum Current 6A | ||
Maximum Operating Temperature +80°C | ||
Width 40.5mm | ||
RoHS Status: Exempt
- COO (Country of Origin):
- PL
Centurion Timed Delay Bolt
Designed to provide a time delay after machine switch off prior to the guard being able to be opened
When the thumb wheel is manually rotated the interlock shaft is withdrawn, isolating the positive break safety contacts, removing the power to machinery
Only when completely withdrawn can equipment be accessed, typically taking 15-20 seconds
2N/C 1 N/O contacts, make-before-break
IP66 ingress protection
Simple operation & installation
Conforms to EN 1088, EN 292, EN 60947-5-1, EN 60204-1
When the thumb wheel is manually rotated the interlock shaft is withdrawn, isolating the positive break safety contacts, removing the power to machinery
Only when completely withdrawn can equipment be accessed, typically taking 15-20 seconds
2N/C 1 N/O contacts, make-before-break
IP66 ingress protection
Simple operation & installation
Conforms to EN 1088, EN 292, EN 60947-5-1, EN 60204-1
Allen Bradley Guardmaster Centurion 440K-B04026 Safety-Rated Interlock Switch
This 440K-B04026 guard locking switch is positive mode and thumbwheel operated, and is ideally suited for use with simple machines which have short, constant run-down times due to the 20 second delay before the guard door can be opened. It is important that the unit is installed and operated correctly to ensure that the retractable shaft is not extended when the guard is open.
This durable safety switch has Break Before Make Action (opens the first set of contacts before closing new contacts). Actuator type is Left Hand. It features M20 Conduit Entry and has an operating temperature of -25°C to +80°C. Thermal current rating is 10A and it has a rated insulation voltage of 500V.
Features and Benefits
• 2NC Safety Contacts, 1NO Auxiliary
• Easy to operate and simplified installation for your convenience
• Perfect for use in heavy duty applications due to robust die-cast metal alloy housing material
• Locks the guard firmly closed until the operator manually rotates the thumbwheel, retracting the shaft from the guard door
• 15-20 second time delay before the guard can be released
• Isolates power to machine when the guard door is open, minimising risk of injury to personnel
• Easy to operate and simplified installation for your convenience
• Perfect for use in heavy duty applications due to robust die-cast metal alloy housing material
• Locks the guard firmly closed until the operator manually rotates the thumbwheel, retracting the shaft from the guard door
• 15-20 second time delay before the guard can be released
• Isolates power to machine when the guard door is open, minimising risk of injury to personnel
Certifications
BG certified
SUVA certified
EN954-1
ISO13849-1
IEC/EN60204-1
NFPA79
EN1088
ISO14119
IEC/ EN60947-5-1
ANSI B11.19
AS4024.1
IP66 rated
CE certified
cULus approved
SUVA certified
EN954-1
ISO13849-1
IEC/EN60204-1
NFPA79
EN1088
ISO14119
IEC/ EN60947-5-1
ANSI B11.19
AS4024.1
IP66 rated
CE certified
cULus approved
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.
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