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Vishay Semiconductor Opto Division LH1505AB
- Part No.:
- LH1505AB
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Solid State Relays (SSR)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LH1505AB.pdf
- Description:
- SSR RELAY SPST-NO 120MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:2,179
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Product details
Overview
LH1505AB from Vishay Semiconductors is a dual 1 Form A solid-state relay (SSR) with two independent normally open MOSFET output switches, GaAlAs LED input control, 5300 VRMS isolation, 250 V load voltage rating, and 120 mA max dual-channel continuous load current. It replaces electromechanical relays in telecom switching, security systems, and industrial controls where bounce-free, low-power switching is required.
For engineers reviewing the LH1505AB datasheet, LH1505AB pinout, LH1505AB application, or LH1505AB equivalent, this device is selected for high-isolation AC/DC load switching with clean turn-on/turn-off timing, low on-resistance (12 Ω typ.), and safety-certified insulation per UL 1577 and VDE 0884-5.
Technical Context
The LH1505AB integrates two optically isolated MOSFET switches driven by a single GaAlAs LED per channel. Each channel operates independently with separate anode/cathode inputs and source/drain outputs, enabling SPST or DPST configurations without internal coupling.
Its isolation barrier meets reinforced insulation requirements per DIN EN 60747-5-5 (VDE 0884-5), supporting 5300 VRMS withstand voltage and 8000 Vpeak transient isolation. Output safety power is rated at 480 mW for dual-channel operation at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5300 VRMS - enables safe separation between control logic (3.3/5 V) and 250 V AC/DC loads in industrial I/O modules |
| Load Voltage Rating | 250 V - supports direct switching of mains-powered sensors, solenoids, and telecom line interfaces |
| Max Dual-Channel Load Current | 120 mA - sufficient for driving low-power AC actuators, indicator lamps, and signal path routing in ATE |
| Typical On-Resistance | 12 Ω - limits conduction loss to <150 mW per channel at 100 mA, reducing thermal stress in sealed enclosures |
| Turn-On / Turn-Off Time | 0.20 / 0.03 ms typ. - ensures precise timing control in automated test sequencing and data acquisition gating |
| Input Forward Current (Turn-On) | 0.4–2 mA - compatible with microcontroller GPIOs without external drivers, reducing BOM count |
| Off-State Leakage | <1 nA at ±100 V - prevents false triggering in high-impedance analog monitoring circuits |
Pinout & Package
DIP-8 package with 0.3″ (7.62 mm) lead pitch, through-hole mounting, and creepage/clearance ≥7 mm for reinforced insulation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Anode / Cathode (Channel 1 LED) | Optical input pair for first SSR channel; requires series resistor to limit IF ≤50 mA |
| 3, 4 | Source / Drain (Channel 1 MOSFET) | Normally open load switch terminals; bidirectional blocking up to ±250 V |
| 5, 6 | Anode / Cathode (Channel 2 LED) | Independent optical input for second SSR channel; electrically isolated from Pin 1–2 |
| 7, 8 | Source / Drain (Channel 2 MOSFET) | Second isolated load path; no internal connection to Pins 3–4, enabling true dual SPST operation |
Key Features
| Feature | Design Value |
|---|---|
| Clean bounce-free switching | Zero mechanical contact wear or arcing - eliminates maintenance in security alarm panels and telecom line cards |
| 5300 VRMS isolation | Meets UL 1577 and VDE 0884-5 reinforced insulation - allows direct interface between 24 V PLC logic and 230 VAC field devices |
| Low 12 Ω typical RON | Minimizes self-heating during sustained 100 mA load operation - supports >10⁶ cycles without derating at 60 °C ambient |
| 0.03 ms typ. turn-off time | Enables fast signal blanking in precision instrumentation sampling windows and RF test fixture control |
| Material compliance (GB4943.1, GB8898) | Qualified for use in Class I and Class II consumer and industrial end-equipment requiring fire and electric shock protection |
Applications
| Telecom Line Switching | Security System Zone Control |
|---|---|
|
Use Scenario: Routing POTS line signals between central office and subscriber ports in DSLAM line cards. IC Role / Device Role / Timing Role: Dual SPST solid-state relay providing galvanic isolation and hot-swap-safe line disconnection. Use Value: Eliminates contact oxidation and chatter-induced noise in voice-grade analog paths while maintaining 250 V RMS surge tolerance. |
Use Scenario: Isolating zone inputs in commercial intrusion detection panels handling multiple door/window sensors. IC Role / Device Role / Timing Role: Two independent normally open switches enabling discrete zone enable/disable under microcontroller command. Use Value: Prevents ground loop interference between zones and supports fail-safe open-circuit reporting without relay coil current draw. |
| Industrial PLC I/O Module | Automatic Test Equipment (ATE) |
|
Use Scenario: Driving 24 VDC solenoid valves and indicator LEDs in modular I/O backplanes. IC Role / Device Role / Timing Role: Dual-channel load switch with integrated optical isolation replacing discrete opto-MOS + driver combinations. Use Value: Reduces PCB area by 40% vs. discrete solutions while guaranteeing 5300 VRMS channel-to-channel and channel-to-ground isolation. |
Use Scenario: Signal path selection and DUT power sequencing in semiconductor functional testers. IC Role / Device Role / Timing Role: Precision timing-controlled load switch for applying test voltages only during valid measurement windows. Use Value: 0.03 ms turn-off time ensures nanosecond-level timing accuracy in multi-site parallel testing architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar solid-state relay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLP3554(TP,E | Single-channel, 60 V load rating, 2.5 A load current, SOIC-8 package | Higher current, lower voltage - suited for DC motor control but not 230 VAC line switching | Select when higher load current is needed and isolation voltage ≤3750 VRMS suffices |
| PS7141-AL-AX | Dual-channel, 400 V load rating, 120 mA load current, DIP-8 package, 3750 VRMS isolation | Same pinout and footprint, but lower isolation voltage and higher RON (25 Ω typ.) | Acceptable for non-safety-critical 230 VAC switching where UL/VDE certification is not mandated |
Compared with TLP3554(TP,E and PS7141-AL-AX, the LH1505AB uniquely delivers dual-channel 250 V capability with 5300 VRMS isolation in DIP-8 - making it the only option qualified for reinforced insulation in mains-connected industrial control and telecom infrastructure.
Availability
LH1505AB is available at Aetrix Electronics and suitable for telecom line switching, security system zone control, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for LH1505AB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, optoelectronics, and passive devices with emphasis on reliability and safety certification.
The LH1505AB belongs to Vishay's LH-series optically coupled solid-state relays, engineered for high-isolation, low-power replacement of electromechanical relays in safety-critical industrial and telecom equipment.
FAQ
What is the maximum ambient temperature for continuous operation of the LH1505AB?
The LH1505AB supports continuous operation from –40 °C to +85 °C ambient. At +85 °C, its dual-channel continuous load current is derated to 120 mA, and output safety power drops to 480 mW - values confirmed in the Absolute Maximum Ratings table and Fig. 2 of the Vishay datasheet (Doc. #83809, Rev. 1.8).
Does the LH1505AB support AC load switching?
Yes, the LH1505AB supports both AC and DC loads up to 250 V peak. Its MOSFET output structure provides bidirectional blocking, and its 5300 VRMS isolation rating covers standard 230 VAC mains applications - verified under UL 1577 and DIN EN 60747-5-5 safety approvals listed in the datasheet.
What is the minimum input forward current required to turn on the LH1505AB?
The LH1505AB turns on with as little as 0.4 mA typical forward current (IFon) at 25 °C, per the Electrical Characteristics table. This low drive requirement allows direct interfacing with low-power microcontrollers and logic gates without additional buffer circuitry.
How does the LH1505AB achieve bounce-free switching?
The LH1505AB achieves bounce-free switching through its solid-state MOSFET output architecture - eliminating mechanical contacts entirely. Unlike electromechanical relays, it has no contact chatter, arcing, or wear-out mechanism, delivering deterministic turn-on/turn-off timing (0.20 ms / 0.03 ms typ.) across its full temperature range.
Is the LH1505AB RoHS compliant and halogen-free?
Yes, the LH1505AB is RoHS-compliant and halogen-free per Vishay's material declaration (Doc. #99912). It meets JEDEC J-STD-020 moisture sensitivity level 1 and carries no lead-free exemptions - confirmed in the "Material categorization" section and Handling & Storage Conditions of the datasheet.
LH1505AB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- LH1505
- Packaging:
- Tube
- Product Status:
- Active
- Mounting Type:
- Through Hole
- Circuit:
- SPST-NO (1 Form A) x 2
- Output Type:
- AC, DC
- Voltage - Input:
- 1.26VDC
- Voltage - Load:
- 0 V ~ 250 V
- Load Current:
- 120 mA
- On-State Resistance (Max):
- 15 Ohms
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DIP
- Approval Agency:
- CQC, cUL, DIN, FIMKO, UL
- Grade:
- -
- Qualification:
- -
LH1505AB FAQ
1.How can I place an order for LH1505AB through Aetrix?
Please submit a Request for Quotation (RFQ) for LH1505AB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LH1505AB reliable?
The price and inventory of LH1505AB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LH1505AB is usually 5 days.
3.What payment methods are accepted for LH1505AB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LH1505AB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LH1505AB?
LH1505AB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LH1505AB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LH1505AB?
For technical support, including LH1505AB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LH1505AB requirements.
6.How does Aetrix verify that LH1505AB is sourced from the original manufacturer or authorized distributors?
All LH1505AB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LH1505AB meets industry standards.
7.What is the process for return or replacement of LH1505AB?
All LH1505AB units undergo pre-shipment inspection (PSI). If there is an issue with LH1505AB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LH1505AB part is unused and in its original packaging.
Return procedure for LH1505AB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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