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Vishay LH1540AT High-Voltage Solid-State Relay

The LH1540 is a robust, high-voltage solid-state relay suitable for telecom, industrial, and control applications. It features an SPST normally open switch with LED control, integrated MOSFET switches, and current limiting circuitry meeting surge and lightning requirements. Its high isolation voltage of 5300 V, load voltage up to 350 V, and load current of 120 mA make it ideal for ground fault detection and general switching tasks. The relay offers low power consumption, bounce-free switching, and RoHS compliance, with variants available in SMD and through-hole packages for versatile deployment.

Authorized Distributors
Source:Newark
Part No:LH1540AT
Stock:2681
Inv Date:06-09-2026
Price: Unit price: $2.07
Buy/RFQ:
Source:DigiKey
Part No:LH1540AT
Stock:4060
Inv Date:06-09-2026
Price: Unit price: $2.42
Buy/RFQ:
Part No:LH1540AT
Stock:3261
Inv Date:06-10-2026
Price: Unit price: $2.35
Buy/RFQ:
Part No:LH1540AT
Stock:108
Inv Date:06-09-2026
Price: Unit price: $0.92
Buy/RFQ:
Part No:LH1540AT
Stock:0
Inv Date:06-09-2026
Price: Unit price: $1.19
Buy/RFQ:
Source:Arrow EU
Part No:LH1540AT
Stock:2000
Inv Date:06-10-2026
Price: N/A
Buy/RFQ:

Vishay LH1540AT High-Voltage Solid-State Relay Specifications:

  • Isolation test voltage 5300 Vams
  • Load voltage 350 V
  • Load current 120 mA
  • On-resistance 20.9 Ω typical, 25 Ω maximum
  • Input forward current 50 mA
  • Switching time 12 ms (on), 5 ms (off)
  • Peak load current 175 210 250 mA
  • Ambient temperature range -40 to +85 °C
  • Storage temperature range -40 to +150 °C
  • Pin soldering temperature max 260 °C for 10 seconds
  • Output power dissipation 550 mW
  • Insulation resistance > 10^9 Ω at 25 °C
  • Overall dimensions in millimeters: 7.62 x 4.3 x 2.54
  • Compliance RoHS, UL1577, CSA, BSI, FIMKO
  • High surge capability and high-voltage dielectric isolation
  • Particularly suitable for ground fault detection and telecom switching applications

Buy the Buy Vishay LH1540AAB Part Number LH1540AT Online

Discover the Vishay LH1540 relay, perfect for telecom, industrial, and ground fault protection. Its high isolation voltage, load capacity of 350 V, and 120 mA current make it ideal for demanding switching applications. The relay features low power consumption, bounce-free operation, and compliance with RoHS standards. Available in surface-mount and through-hole packages, it ensures versatility and durability for your control and instrumentation needs. Buy online today to enhance your reliability and system performance with Vishay quality.

Get Vishay LH1540AAB today—built for high-voltage switching and reliable telecom, industrial, and control applications.

Frequently Asked Questions

Where can I buy Vishay LH1540AT?

You can click on the BUY or RFQ button to purchase LH1540AT from an authorized Vishay distributor.

How do I troubleshoot issues or seek technical support for part LH1540AT?

You can download the LH1540AT datasheet or visit the Vishay website for support.

Who is the manufacturer of LH1540AT?

Vishay

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