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Littelfuse MDSR42238 Hermetic Reed Switch

The MDSR-4-22-38 is an SPST reed switch with axial contacts, offering a reliable normally open switching function suitable for industrial environments. It features high insulation resistance of 10^10 Ohms and can switch up to 200Vdc at 10 Watts, making it ideal for signal switching, security, and telephony applications. Its durable hermetically sealed contacts are unaffected by environmental factors, providing low contact resistance and lifetime stability. The switch operates from -40°C to +125°C, with quick operate and release times of less than 0.6 ms and 0.2 ms respectively. Compact in size, it complies with UL recognition standards, ensuring safety and quality.

Authorized Distributors
Source:Newark
Part No:MDSR-4 22-38
Stock:795
Inv Date:05-28-2026
Price: Unit price: $1.35
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Source:DigiKey
Part No:MDSR-4-22-38
Stock:1000
Inv Date:05-28-2026
Price: Unit price: $1.44
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Part No:MDSR-4-22-38
Stock:1680
Inv Date:05-29-2026
Price: Unit price: $1.37
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Part No:MDSR-4-22-38
Stock:0
Inv Date:05-28-2026
Price: Unit price: $1.09
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Part No:MDSR-4-22-38
Stock:0
Inv Date:05-28-2026
Price: Unit price: $0.92
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Part No:MDSR-4-22-38
Stock:2
Inv Date:05-29-2026
Price: N/A
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Littelfuse MDSR42238 Hermetic Reed Switch Specifications:

  • Contact Rating: 10 Watts at 200Vdc
  • Insulation Resistance: 10^10 Ohms
  • Maximum Operating Voltage: 200Vdc
  • Operating Temperature Range: -40°C to +125°C
  • Operate Time: less than 0.6 ms
  • Release Time: less than 0.2 ms
  • Hermetically sealed contacts for environmental stability
  • Dimensions: 20.19 mm length, 12.70 mm width, 1.80 mm height
  • UL Recognized, File E47258
  • Surface mount and axial contact options available
  • Resistant to environmental influences and vibration

Buy the Buy Hamlin MDSR-4-22-38 Part Number MDSR42238 Online

Purchase the Hamlin MDSR-4-22-38 hermetic reed switch online today to benefit from its high reliability, hermetically sealed contacts, and fast operation. Ideal for signal switching, security, and telephony applications, this compact switch is designed to withstand harsh environments with operating temperatures from -40°C to +125°C. Its high insulation resistance of 10^10 Ohms ensures minimal leakage, while UL recognition guarantees safety and quality standards. Efficient and durable, it is perfect for industrial automation, security systems, and high-precision electronic applications. Get yours now for dependable, long-lasting performance.

Order your Hamlin Series MDSR-4-22-38 hermetic reed switch today and ensure reliable magnetic switching performance for your industrial projects.

Frequently Asked Questions

Where can I buy Littelfuse MDSR42238?

You can click on the BUY or RFQ button to purchase MDSR42238 from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part MDSR42238?

You can download the MDSR42238 datasheet or visit the Littelfuse website for support.

Who is the manufacturer of MDSR42238?

Littelfuse

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