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Littelfuse MDSM4R1218 Reed Switch

This reed switch features a single-pole, single-throw normally open contact configuration. It has a carry current of 1.2 Amps, a maximum switching voltage of 200 VDC, and an operating time of 0.6 milliseconds. The sensitivity range is between 12 to 18 AT. Designed for various sensing applications, it offers hermetically sealed contacts, low contact resistance, and zero power operation during contact closure. Compact and reliable, this switch is ideal for position, level sensing, security, telecoms, and office equipment, ensuring durable performance in diverse environments.

Authorized Distributors
Source:Newark
Part No:MDSM-4R-12-18
Stock:1391
Inv Date:05-28-2026
Price: Unit price: $0.395
Buy/RFQ:
Source:DigiKey
Part No:MDSM-4R-12-18
Stock:60843
Inv Date:05-28-2026
Price: Unit price: $0.77614
Buy/RFQ:
Part No:MDSM-4R-12-18
Stock:16711
Inv Date:05-29-2026
Price: Unit price: $1.57
Buy/RFQ:
Part No:MDSM-4R-12-18
Stock:2644
Inv Date:05-28-2026
Price: Unit price: $0.44
Buy/RFQ:
Part No:MDSM-4R-12-18
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.825
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Source:Arrow EU
Part No:MDSM-4R-12-18
Stock:5362
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:
Part No:MDSM-4R-12-18
Stock:7
Inv Date:05-29-2026
Price: N/A
Buy/RFQ:

Littelfuse MDSM4R1218 Reed Switch Specifications:

  • Contact Form: Normally Open
  • Contact Rating: Max 200Vdc, 1.2A carry current, 10W max power
  • Insulation Resistance: 10^8 Ohms
  • Contact Resistance: Max 0.10 Ohms
  • Temperature Range: -40°C to +125°C
  • Dimensions: 0.600” x 0.090” (15.24mm x 2.28mm)
  • Operating Time: Max 0.6 ms
  • Sensitivity Range: 12-18 AT
  • Hermetically sealed contacts
  • Voltage Switching: Max 200V DC
  • Material: Glass envelope
  • Packaging: Bulk or tape and reel for automated assembly

Buy the Buy Hamlin Reed Switch Part Number MDSM4R1218 Online

Purchase your Hamlin Series MDSM4R1218 reed switch online today for dependable sensing and switching applications. This compact, hermetically sealed switch provides a maximum of 200VDC switching voltage, 1.2A current capacity, and fast operation within 0.6 milliseconds. Its sensitive range is 12 to 18 AT, making it ideal for position, level sensing, security, telecoms, and office equipment. Easy to integrate into your designs, offering durability, low contact resistance, and zero power consumption during contact closure, ensuring long-term reliable performance in various environments.

Order your Hamlin Series MDSM4R1218 reed switch today and ensure reliable position sensing and security performance in your projects.

Frequently Asked Questions

Where can I buy Littelfuse MDSM4R1218?

You can click on the BUY or RFQ button to purchase MDSM4R1218 from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part MDSM4R1218?

You can download the MDSM4R1218 datasheet or visit the Littelfuse website for support.

Who is the manufacturer of MDSM4R1218?

Littelfuse

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