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Littelfuse 591404S02A Reed Switch

This reed sensor features a single-pole, single-throw normally closed contact configuration, with a carry current of 1.5 Amps. It can switch a maximum voltage of 175 VDC and activates at a distance of approximately 0.413 inches (10.5 mm). The device terminates with leads for easy connection, making it ideal for position, limit sensing, and automation applications. Its hermetically sealed design ensures reliable long-term operation even in contaminated environments, suitable for security systems, linear actuators, and door switches. Compact and easy to install, this sensor provides dependable performance in diverse industrial settings.

Authorized Distributors
Source:Newark
Part No:59140-4-S-02-A
Stock:1516
Inv Date:05-28-2026
Price: Unit price: $5.85
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Source:DigiKey
Part No:59140-4-S-02-A
Stock:0
Inv Date:05-28-2026
Price: Unit price: $5.8
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Part No:59140-4-S-02-A
Stock:825
Inv Date:05-29-2026
Price: Unit price: $6.17
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Part No:59140-4-S-02-A
Stock:0
Inv Date:05-28-2026
Price: Unit price: $4.96
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Part No:59140-4-S-02-A
Stock:0
Inv Date:05-28-2026
Price: Unit price: $3.77
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Littelfuse 591404S02A Reed Switch Specifications:

  • Contact Type: Normally Closed
  • Contact Rating Power: 10 Watts max
  • Maximum Voltage Switching: 175 VDC
  • Breakdown Voltage: 200 V minimum
  • Maximum Current Switching: 0.25 A
  • Carry Current: 1.5 A
  • Contact Resistance, Initial: 0.2 Ohms max
  • Insulation Resistance: 10^8 Ohms min
  • Operating Temperature Range: -40°C to +105°C
  • Storage Temperature Range: -65°C to +105°C
  • Operate Time: 1.0 ms max
  • Release Time: 1.0 ms max
  • Capacitance Contact: 0.2 pF typical
  • Shock Resistance: 100% sine wave, 11 ms
  • Vibration Resistance: 30 G max, 50-2000 Hz
  • Activation Distance: approximately 10.5 mm (0.413 in)
  • Lead Termination: Leads exits from either side, compatible with various cable lengths
  • Sealed construction for contamination resistance
  • Application: Position sensing, limit switches, security systems, door sensors

Buy the Hamlin 591404S02A – Reliable Reed Switch for Industrial Applications

Purchase the Hamlin reed switch online today—designed for high reliability in industrial position sensing, limit detection, security systems, and automation. Its hermetically sealed construction ensures long-term dependable performance in contaminated environments. Easy to install with leads exiting from either side, this switch supports various cable lengths and sensitivity options. Its compact size makes it suitable for tight spaces, providing consistent activation at around 0.413 inches (10.5 mm). Order now to experience durable, contact-based switching technology perfect for demanding industrial applications.

Get Hamlin 591404S02A today—built for precision and long-lasting durability, ensuring reliable operation in automation and security systems.

Frequently Asked Questions

Where can I buy Littelfuse 591404S02A?

You can click on the BUY or RFQ button to purchase 591404S02A from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part 591404S02A?

You can download the 591404S02A datasheet or visit the Littelfuse website for support.

Who is the manufacturer of 591404S02A?

Littelfuse

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