We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Honeywell GKNA21 Key-Actuated Safety-Interlock Switch - Key-Actuated Safety-Interlock Switches
HoneywellKey-Actuated Safety-Interlock Switches

Honeywell GKNA21 Key-Actuated Safety-Interlock Switch

The HONEYWELL GKN Series Safety Interlock Switch (MPN GKNA21) is a key-actuated safety-interlock switch with a 1NO/2NC contact configuration. It features a spring-type actuating key with the key hole located on the…

SKU 3G-OTH-30371

Also listed as: GKNA 21 · GKNA-21

Brand
Honeywell
Item
GKNA21 Key-Actuated Safety-Interlock Switch
Category
Key-Actuated Safety-Interlock Switches
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Honeywell
Manufacturer Part Number
GKNA21
Series
GKN
Key Hole Location
Top
Actuating Key Type
Spring
Terminal Connection Type
1/2 in NPT Conduit

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Honeywell Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HONEYWELL GKN Series Safety Interlock Switch (MPN GKNA21) is a key-actuated safety-interlock switch with a 1NO/2NC contact configuration. It features a spring-type actuating key with the key hole located on the top and a 1/2 in NPT conduit terminal connection.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the HONEYWELL GKNA21 safety interlock switch used for?

The HONEYWELL GKNA21 is a key-actuated safety-interlock switch used to guard hazardous machinery in industrial environments. It ensures machine power is isolated when the guard is opened, protecting operators. Common applications include packaging lines, conveyor systems, and robotic cells where reliable safety switching is required.

What are the specifications of the HONEYWELL GKNA21?

The HONEYWELL GKNA21 is part of the GKN Series with a 1NO/2NC contact configuration. It uses a spring-type actuating key with the key hole located on the top. Terminal connection is via 1/2 in NPT conduit. The manufacturer part number is GKNA21, and the brand is HONEYWELL.

Where to buy the HONEYWELL GKNA21 worldwide?

You can source the HONEYWELL GKNA21 safety interlock switch through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide competitive pricing and reliable sourcing for this Honeywell component.

How to install the HONEYWELL GKNA21 safety interlock switch?

Mount the switch securely on the machine guard frame and align the spring-actuating key with the top key hole. Connect wiring through the 1/2 in NPT conduit using appropriate cable glands. Follow Honeywell's installation manual for correct contact wiring (1NO/2NC). Always verify proper guard-door alignment and test the interlock function before operation.

Used in

Common applications for Honeywell
Commercial kitchen and inflight-catering steam boilers — RM7890 / RM7895 flame relays with UV detection
Food-processing ramp-and-dwell ovens — DBC2000E / DBC2100E controllers
Hotel and hospital boiler plants — VR8205 combination gas controls
Petrochemical tank-farm heating — V4xxx gas-valve bodies with ML7420 actuators
Retrofit swap-outs from legacy Fireye / Satronic — Honeywell replacement kits

Honeywell Products

3G Electric supplies Honeywell key-actuated safety-interlock switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
HONEYWELL Safety Interlock Switch: GKE Series, 1NO/1NC (MPN GKEA03L)
Honeywell
HONEYWELL Safety Interlock Switch: GKE Series, 1NO/1NC (MPN GKEA03L)
HONEYWELL Safety Interlock Switch: GKM Series, 1NO/1NC (MPN GKMB33)
Honeywell
HONEYWELL Safety Interlock Switch: GKM Series, 1NO/1NC (MPN GKMB33)
HONEYWELL Safety Interlock Switch: GKM Series, 1NO/1NC (MPN GKMB23)
Honeywell
HONEYWELL Safety Interlock Switch: GKM Series, 1NO/1NC (MPN GKMB23)
The Honeywell GKZ42 is a 90° right angle actuating key from the GKN series. It is designed for use with safety-interlock switches to provide mechanical actuation for machine guarding and access control in industrial environments
Honeywell
The Honeywell GKZ42 is a 90° right angle actuating key from the GKN series. It is designed for use with safety-interlock switches to provide mechanical actuation for machine guarding and access control in industrial environments
The Honeywell GSAA01B is a GSS Series safety-interlock switch with a lever- and roller-actuated plunger mechanism. It features a 1NO/1NC contact configuration and a 1/2 in NPT conduit terminal connection. This switch is used to monitor the position of movable machine guards in industrial environments, providing interlocking to prevent machine operation when guards are open
Honeywell
The Honeywell GSAA01B is a GSS Series safety-interlock switch with a lever- and roller-actuated plunger mechanism. It features a 1NO/1NC contact configuration and a 1/2 in NPT conduit terminal connection. This switch is used to monitor the position of movable machine guards in industrial environments, providing interlocking to prevent machine operation when guards are open

More from Honeywell

View all Honeywell parts
Key-actuated safety-interlock switch with a 90° actuating key type and front key hole location. Features a 10-pin terminal connection. Used in industrial machinery for interlocking guards, doors, and covers to prevent access to hazardous areas until power is removed
Honeywell
Key-actuated safety-interlock switch with a 90° actuating key type and front key hole location. Features a 10-pin terminal connection. Used in industrial machinery for interlocking guards, doors, and covers to prevent access to hazardous areas until power is removed
HONEYWELL Safety Interlock Switch: GKN Series, 3NC (MPN GKNA30)
Honeywell
HONEYWELL Safety Interlock Switch: GKN Series, 3NC (MPN GKNA30)
HONEYWELL Safety Interlock Switch: GK Series, 1NO/1NC, 90° Right Angle (MPN GKBA3L7)
Honeywell
HONEYWELL Safety Interlock Switch: GK Series, 1NO/1NC, 90° Right Angle (MPN GKBA3L7)
HONEYWELL Safety Interlock Switch: GK Series, 4NC, 90° Right Angle (MPN GKBA10L7)
Honeywell
HONEYWELL Safety Interlock Switch: GK Series, 4NC, 90° Right Angle (MPN GKBA10L7)
HONEYWELL Safety Interlock Switch: GKE Series, 2NC (MPN GKEA06L)
Honeywell
HONEYWELL Safety Interlock Switch: GKE Series, 2NC (MPN GKEA06L)
HONEYWELL Safety Interlock Switch: GKE Series, 1NO/1NC (MPN GKEA01L)
Honeywell
HONEYWELL Safety Interlock Switch: GKE Series, 1NO/1NC (MPN GKEA01L)
HONEYWELL Safety Interlock Switch: GK Series, 1NO/3NC (MPN GKBA16L6)
Honeywell
HONEYWELL Safety Interlock Switch: GK Series, 1NO/3NC (MPN GKBA16L6)
HONEYWELL Safety Interlock Switch: GK Series, 1NO/1NC, 90° Right Angle (MPN GKBA1L7)
Honeywell
HONEYWELL Safety Interlock Switch: GK Series, 1NO/1NC, 90° Right Angle (MPN GKBA1L7)