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C&K COMPONENTS E121SD1A3GE Sealed Momentary Pushbutton

The C&K E121SD1A3GE is a sealed snap-acting momentary pushbutton switch suitable for applications requiring a robust and reliable switching solution. It incorporates a long-life contact design to ensure durability and consistent performance. Available in RoHS compliant models, this switch caters to environmentally conscious designs. The inclusion of a disposable splashproof boot provides added protection against moisture and contaminants, making it ideal for harsh environments. Typical applications include instrumentation, telecommunications equipment, and computers.

Authorized Distributors
Source:Newark
Part No:E121SD1A3GE
Stock:23
Inv Date:06-15-2026
Price: Unit price: $14.76
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Source:DigiKey
Part No:E121SD1A3GE
Stock:15
Inv Date:06-15-2026
Price: Unit price: $17.48
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Part No:E121SD1A3GE
Stock:0
Inv Date:06-16-2026
Price: Unit price: $12.71
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Part No:E121SD1A3GE
Stock:0
Inv Date:06-15-2026
Price: Unit price: $16.11
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Part No:E121SD1A3GE
Stock:23
Inv Date:06-15-2026
Price: Unit price: $13.541
Buy/RFQ:
Part No:E121SD1A3GE
Stock:23
Inv Date:06-15-2026
Price: Unit price: $13.541
Buy/RFQ:
Part No:E121SD1A3GE
Stock:0
Inv Date:06-15-2026
Price: Unit price: $10.78
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C&K COMPONENTS E121SD1A3GE Sealed Momentary Pushbutton Specifications:

  • Contact Rating: 0.4 VA max. @ 20 V AC or DC (B contact material), 1 AMP @120 V AC or 28 V DC (G contact material)
  • Case & Bushing: Glass filled nylon 6/6, flame retardant (UL 94V-0)
  • Plunger: Glass filled nylon or glass filled polyester (PBT) (UL 94V-0)
  • Switch Support: Brass or steel, matte-tin
  • Switch Support Retainer: Stainless steel
  • Electrical Life: 60,000 make-and-break cycles
  • N.O. & N.C. Contacts (EX25): Copper alloy, with gold plate over nickel plate
  • N.O. & N.C. Contacts (EX21): Coin silver, with gold plate over nickel plate
  • Contact Resistance: Below 50 mΩ typ. initial @ 2–4 V DC, 100 mA
  • Insulation Resistance: 10[9] Ω min.
  • Dielectric Strength: 1000 Vrms min. @ sea level
  • Common Contacts & Terminals: Copper alloy, with gold plate over nickel plate
  • Operating Temperature: –30ºC to 75ºC
  • Cap Installation Force: 10 lbs. max. permissible
  • Terminal Seal: Epoxy
  • Solderability: Per MIL-STD-202F method 208D or EIA RS-186E method 9
  • Disposable Boot: Vinyl splashproof boot
  • RoHS Compliant Models: Available

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