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NKK Switches S309 Standard Toggle Switch

The S309 is a non-illuminated, medium- to high-capacity, standard-sized panel-mount SPDT toggle switch. It features ON-OFF-(ON) switching functionality with solder lug terminals. The switch has a PBT flatted lever, a chrome-plated brass toggle and bushing, and a melamine phenol case with a zinc-plated steel cover. It is designed for industrial applications, offering a minimum mechanical life of 50,000 operations and an electrical life of at least 25,000 operations. The operating temperature range is from -10°C to 70°C.

Authorized Distributors
Source:DigiKey
Part No:S309
Stock:32
Inv Date:06-17-2026
Price: Unit price: $13.18
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Part No:S309
Stock:0
Inv Date:06-18-2026
Price: Unit price: $12.86
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Part No:S309
Stock:0
Inv Date:06-17-2026
Price: Unit price: $14.95
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Part No:S309
Stock:1
Inv Date:06-17-2026
Price: Unit price: $12.58
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Part No:S309
Stock:0
Inv Date:06-17-2026
Price: Unit price: $9.57
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NKK Switches S309 Standard Toggle Switch Specifications:

  • Contact Resistance: 10 milliohms maximum
  • Insulation Resistance: 1,000 megohms minimum @ 500V DC
  • Dielectric Strength: 2,000V AC minimum for 1 minute
  • Mechanical Life: 50,000 operations minimum
  • Electrical Life: 25,000 operations minimum
  • Operating Temperature Range: -10°C to +70°C
  • Mounting Torque: 2.94Nm (26 lbsin) for double nut
  • Maximum Panel Thickness: as per switch dimension drawings
  • Soldering Time & Temperature: Manual soldering, see Profile A in supplement section
  • Toggle Material: Brass with chrome plating
  • Bushing Material: Brass with chrome plating
  • Case Material: Melamine phenol
  • Case Cover Material: Steel with chromate over zinc plating
  • Movable Contactor: Copper with silver plating
  • Movable Contacts: Silver alloy capped on copper with silver plating
  • Stationary Contacts: Same as movable contacts
  • Terminals: Brass with tin plating

Buy the NKK S309 – Reliable Industrial Toggle Switch for Power Control

Order the NKK S309 toggle switch online today and experience reliable power switching for industrial applications. With a robust design featuring chrome-plated brass and a melamine phenol case, this switch provides superb durability. It supports up to 50,000 mechanical operations and 25,000 electrical cycles, with an operating temperature range from -10°C to 70°C. Perfect for automation, control panels, and machinery, it's easy to install and offers a long service life, making it an essential component for industrial needs.

Get NKK S309 today—built for precision and long-lasting durability in industrial environments.

Frequently Asked Questions

Where can I buy NKK Switches S309?

You can click on the BUY or RFQ button to purchase S309 from an authorized NKK Switches distributor.

How do I troubleshoot issues or seek technical support for part S309?

You can download the S309 datasheet or visit the NKK Switches website for support.

Who is the manufacturer of S309?

NKK Switches

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