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IDEC LB6MK21ST5B Flush Mount Miniature Switch

The IDEC LB6MK-21ST5B is a flush mount miniature switch and pilot light offering a stylish and compact solution for industrial applications. Its low-profile design (only 2mm projecting from the panel) and depth of 27.9mm make it ideal for smaller machines and panels. The switch provides IP65 protection against water and dust ingress, ensuring reliable operation in harsh environments. Removable contact blocks allow for flexible single board mounting, and a variety of key selector options and LED illumination enhance functionality and user interface. Suitable for applications requiring robust and space-saving switching solutions.

Authorized Distributors
Source:DigiKey
Part No:LB6MK-21ST5B
Stock:0
Inv Date:06-10-2026
Price: Unit price: $67.14
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Part No:LB6MK-21ST5B
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Inv Date:06-11-2026
Price: Unit price: $60.28
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Part No:LB6MK-21ST5B
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Inv Date:06-11-2026
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Part No:LB6MK-21ST5B
Stock:0
Inv Date:06-10-2026
Price: Unit price: $68.58
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Part No:LB6MK-21ST5B
Stock:19
Inv Date:06-10-2026
Price: Unit price: $62.63
Buy/RFQ:
Part No:LB6MK-21ST5B
Stock:19
Inv Date:06-10-2026
Price: Unit price: $62.63
Buy/RFQ:

IDEC LB6MK21ST5B Flush Mount Miniature Switch Specifications:

  • Operating Temperature: –25 to +60°C (no freezing)
  • Storage Temperature: –30 to +80°C (no freezing)
  • Operating Humidity: 45 to 85% RH (no condensation)
  • Contact Resistance: 50 mW maximum (initial value)
  • Insulation Resistance: 100 MW minimum (500V DC megger)
  • Dielectric Strength: Switch: Between live part and ground: 2,000V AC, 1 min.
  • Vibration Resistance: Operating extremes/Damage limits: 5 to 55 Hz, amplitude 0.5mm
  • Shock Resistance: Operating extremes: 100 m/s², Damage limits: 1,000 m/s²
  • Mechanical Life: Momentary: 2,000,000 operations
  • Electrical Life: Momentary: 50,000 / 100,000 operations
  • Degree of Protection: IP65 (IEC 60529)
  • Terminal Style: Solder/tab terminal #110, PC board terminal
  • Bezel Weight (approx.): 11g (lever switch), 13g (pilot light, pushbutton)

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Frequently Asked Questions

Where can I buy IDEC LB6MK21ST5B?

You can click on the BUY or RFQ button to purchase LB6MK21ST5B from an authorized IDEC distributor.

How do I troubleshoot issues or seek technical support for part LB6MK21ST5B?

You can download the LB6MK21ST5B datasheet or visit the IDEC website for support.

Who is the manufacturer of LB6MK21ST5B?

IDEC

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