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Honeywell 1DM21 Safety Interlock Switch

The 1DM21 is a safety interlock switch featuring single pole double throw circuitry. It offers quick-connect terminals and a snap-in housing for easy setup. Suitable for appliance door lights, door interlocks, and stop/start controls, it includes a push-pull actuator for manual operation. Designed for durability, this switch withstands up to 1 million cycles with a 95% survival rate, making it highly reliable in industrial safety systems. Its rugged construction and versatile mounting options ensure long-lasting performance in demanding environments.

Authorized Distributors
Source:Newark
Part No:1DM21
Stock:24
Inv Date:06-01-2026
Price: Unit price: $17.06
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Source:DigiKey
Part No:1DM21
Stock:179
Inv Date:06-01-2026
Price: Unit price: $23.47
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Part No:1DM21
Stock:2
Inv Date:06-02-2026
Price: Unit price: $32.52
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Part No:1DM21
Stock:73
Inv Date:06-01-2026
Price: Unit price: $22.94
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Part No:1DM21
Stock:91
Inv Date:06-01-2026
Price: Unit price: $14.88
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Part No:1DM21
Stock:16
Inv Date:06-01-2026
Price: Unit price: $46.09
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Part No:1DM21
Stock:446
Inv Date:06-02-2026
Price: N/A
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Honeywell 1DM21 Safety Interlock Switch Specifications:

  • Circuitry: SPDT (Single Pole Double Throw)
  • Operation Modes: Momentary, alternate actions
  • Actuator Type: Push-pull button with plungers
  • Mounting: Snap-in panel mount housing
  • Electrical Ratings: 10A, 16A at 125/250/277 Vac
  • Mechanical Life: Up to 1,000,000 operations
  • Durability: 95% survival rate
  • Environmental Range: Suitable for industrial environments
  • Construction: Rugged, lightweight snap-in design
  • Application: Appliance door lights, interlocks, stop/start switches

Buy the Honeywell Series DM: Safety Interlock Switch 1DM21

Purchase the Honeywell 1DM21 safety interlock switch online today for reliable performance in industrial safety systems. Featuring quick-connect terminals and a rugged snap-in design, this switch ensures easy installation and long-term durability. It is suitable for appliance door lights, door interlocks, and stop/start controls, offering up to 1 million cycles. Its high durability, multiple operation modes, and certifications guarantee compliance with safety standards. Buy now to enhance safety and operational reliability in your equipment, backed by Honeywell's trusted quality.

Get Honeywell 1DM21 today—built for precision, safety, and long-lasting durability in industrial applications.

Frequently Asked Questions

Where can I buy Honeywell 1DM21?

You can click on the BUY or RFQ button to purchase 1DM21 from an authorized Honeywell distributor.

How do I troubleshoot issues or seek technical support for part 1DM21?

You can download the 1DM21 datasheet or visit the Honeywell website for support.

Who is the manufacturer of 1DM21?

Honeywell

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