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Vishay Semiconductor Opto Division LH1500AAB
- Part No.:
- LH1500AAB
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Solid State Relays (SSR)
- Package:
- 6-SMD (0.300", 7.62mm)
- Datasheet:
-
LH1500AAB.pdf
- Description:
- SSR RELAY SPST-NO 150MA 0-350V
- Quantity:
- Payment:
- Shipping:
Inventory:3,313
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Product details
Overview
LH1500AAB from Vishay Semiconductors is a solid-state relay (SSR) with 1 Form A (SPST-NO) configuration, GaAlAs LED input and dual-MOSFET output, delivering 5300 VRMS isolation, 22 Ω typical on-resistance (AC/DC), and 350 V load voltage - used in telecom line switching and ground fault detection circuits.
For engineers reviewing the LH1500AAB datasheet, LH1500AAB pinout, LH1500AAB application, or LH1500AAB equivalent, this SSR provides bounce-free switching, low-power actuation (0.3 mA typical turn-on IF), and safety-certified insulation for industrial control and instrumentation signal path isolation.
Technical Context
The LH1500AAB integrates an optically coupled GaAlAs LED driver with back-to-back MOSFETs to realize a normally open AC/DC solid-state switch. Its internal architecture enables clean zero-crossing–independent switching with no contact wear or EMI from arcing.
It meets UL 1577, cUL, VDE 0884-5, and FIMKO safety standards, supporting 890 Vpeak repetitive peak isolation voltage (VIORM) and ≥10¹² Ω isolation resistance at 500 V. The device operates across –40 °C to +85 °C ambient with 0.13 ms typical turn-on time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5300 VRMS (1 min test); enables safe separation between control and high-voltage load domains per UL/cUL/VDE standards |
| On-Resistance (AC/DC) | 22 Ω typical (IF = 5 mA, IL = 50 mA); ensures <1.1 W conduction loss at 140 mA load current |
| Load Voltage Rating | 350 V (DC or peak AC); supports telecom ring voltage, alarm circuits, and industrial AC mains sensing |
| Continuous Load Current | 140 mA (AC/DC config); sufficient for driving solenoids, indicator lamps, and low-power relays |
| Turn-On Time | 0.13 ms typical (IF = 5 mA, IL = 50 mA); enables fast response in protection and monitoring logic |
| Input Forward Current (Turn-On) | 0.3 mA typical (IL = 100 mA, t = 10 ms); allows direct drive from low-power MCU GPIO without buffer |
| Off-State Leakage | <1 nA at ±100 V; guarantees high-impedance blocking in standby, critical for precision instrumentation inputs |
Pinout & Package
SMD-6 surface-mount package (7.25 mm × 6.65 mm × 2.54 mm height), RoHS-compliant, moisture sensitivity level 1, lead-free reflow compatible per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | LED Anode Input | Connects to MCU/driver high-side; requires series resistor to limit IF ≤ 50 mA |
| 2 (Cathode) | LED Cathode Input | Ground reference for LED; polarity-sensitive - reverse connection blocks activation |
| 3 (NC) | No Connect | Internally unconnected; must remain floating - no PCB trace or via allowed |
| 4 (Load+) | Switch Output Terminal (+) | High-side load connection point in DC-only configuration; tied to VL in AC/DC mode |
| 5 (Load−) | Switch Output Terminal (−) | Low-side load return in DC-only; common node with S1/S2 in AC/DC configuration |
| 6 (NC) | No Connect | Internally unconnected; electrically isolated - no routing or thermal pad connection |
Key Features
| Feature | Design Value |
|---|---|
| Bounce-free switching | Zero mechanical contact wear or transient noise - eliminates debounce circuitry in PLC I/O modules |
| 5300 VRMS isolation | Enables safe interface between 3.3 V microcontrollers and 350 V telecom lines without external barrier design |
| 0.3 mA typical turn-on IF | Reduces driver power budget by >90% vs. legacy optorelays; extends battery life in portable test equipment |
| 22 Ω RON (AC/DC) | Minimizes self-heating at 140 mA load - supports continuous operation without heatsink in sealed enclosures |
| VDE 0884-5 certification | Validates reinforced insulation for functional safety in industrial control systems up to 300 V working voltage |
Applications
| Telecom Line Switching | Ground Fault Detection |
|---|---|
|
Use Scenario: Isolating and switching POTS line signals in DSLAMs and VoIP gateways under ±170 V ring voltage. IC Role / Device Role / Timing Role: Solid-state relay providing galvanic isolation and SPST-NO switching of analog voice paths. Use Value: Eliminates contact oxidation and click noise; maintains signal integrity over 10⁶ cycles without degradation. |
Use Scenario: Monitoring leakage current in medical or lab equipment chassis to trigger shutdown on >5 mA fault. IC Role / Device Role / Timing Role: High-impedance isolation switch enabling safe sampling of grounded chassis potential. Use Value: Sub-1 nA off-state leakage prevents false triggers; 5300 VRMS withstand blocks surge coupling during fault events. |
| Security Panel Zone Control | Industrial Sensor Signal Conditioning |
|
Use Scenario: Enabling/disabling 12–24 V DC zones in fire alarm panels based on zone supervision logic. IC Role / Device Role / Timing Role: Low-power, high-reliability load switch replacing electromechanical relays in life-safety circuits. Use Value: 0.13 ms turn-on ensures rapid zone enablement; 140 mA rating supports multiple end-of-line resistors in parallel. |
Use Scenario: Isolating 4–20 mA current loop transmitters from PLC analog inputs in hazardous area barriers. IC Role / Device Role / Timing Role: Safety-rated SSR acting as programmable isolation switch in intrinsically safe signal conditioning modules. Use Value: VIORM = 890 Vpeak and CTI = 175 meet IEC 60079-11 creepage requirements; 7 mm clearance satisfies Zone 1 spacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar solid-state relay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VO3120 | Higher 6000 VRMS isolation; 35 Ω RON (typ); DIP-6 only; no SMD variant | Better suited for higher-altitude or Class I Division 2 environments requiring enhanced dielectric strength | Select VO3120 when >5300 VRMS is mandated and board space permits DIP-6 footprint |
| IXYS CPC1976Y | Lower 1500 VRMS isolation; 16 Ω RON (typ); 120 mA load current; SMD-6 package | Targeted at cost-sensitive consumer-grade controls where full telecom-grade isolation is not required | Choose CPC1976Y for non-safety-critical 24 V DC loads where PCB real estate and BOM cost are primary constraints |
Compared with VO3120 and CPC1976Y, the LH1500AAB uniquely balances telecom-grade isolation (5300 VRMS), SMD-6 compactness, and 140 mA AC/DC load capability - making it optimal for space-constrained, safety-certified telecom and industrial edge nodes.
Availability
LH1500AAB is available at Aetrix Electronics and suitable for telecom infrastructure, ground fault monitoring systems, security panel zone control, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for LH1500AAB 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 LH1500AAB belongs to Vishay's LH1500 family of optically isolated solid-state relays, engineered specifically for high-isolation, low-power switching in telecom, industrial safety, and instrumentation applications.
FAQ
What is the maximum continuous load current rating for the LH1500AAB?
The LH1500AAB supports 140 mA continuous load current in AC/DC configuration and 250 mA in DC-only configuration. These ratings are validated per IEC 60747-5-5 and apply across –40 °C to +85 °C ambient temperature. Derating is required above 60 °C per Figure 5 in the LH1500AAB datasheet.
Does the LH1500AAB require an external current-limiting resistor on the LED input?
Yes, the LH1500AAB requires an external series resistor on the LED anode (Pin 1) to limit forward current to ≤50 mA. For typical 3.3 V MCU GPIO drive, a 100 Ω resistor sets IF ≈ 3.3 mA - well within the 0.3 mA turn-on threshold and below absolute maximum ratings.
Can the LH1500AAB switch AC loads directly without external zero-crossing circuitry?
Yes, the LH1500AAB is rated for AC/DC load operation up to 350 V peak. Its dual-MOSFET output inherently supports bidirectional conduction without external components, though it does not provide zero-crossing turn-on - making it suitable for non-dimming, non-phase-control AC switching.
What safety certifications does the LH1500AAB hold?
The LH1500AAB is certified to UL 1577 (5300 VRMS), cUL, DIN EN 60747-5-5 (VDE 0884-5), and FIMKO. It achieves VIORM = 890 Vpeak, creepage/clearance ≥7 mm, and CTI = 175 - qualifying it for reinforced insulation in functional safety applications up to 300 V working voltage.
How does the LH1500AAB differ from the LH1500AABTR variant?
The LH1500AAB and LH1500AABTR share identical electrical specifications, package dimensions, and pinout. The sole difference is packaging: LH1500AAB ships in tube format (50 units/tube), while LH1500AABTR is supplied in tape-and-reel (1000 units/reel) for automated SMT assembly - no performance or reliability distinction exists between them.
LH1500AAB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- LH1500
- Packaging:
- Tube
- Product Status:
- Active
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.25VDC
- Voltage - Load:
- 0 V ~ 350 V
- Load Current:
- 150 mA
- On-State Resistance (Max):
- 20 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-SMD
- Approval Agency:
- cUR, DIN, FIMKO, UL
- Grade:
- -
- Qualification:
- -
LH1500AAB FAQ
1.How can I place an order for LH1500AAB through Aetrix?
Please submit a Request for Quotation (RFQ) for LH1500AAB 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 LH1500AAB reliable?
The price and inventory of LH1500AAB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LH1500AAB is usually 5 days.
3.What payment methods are accepted for LH1500AAB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LH1500AAB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LH1500AAB?
LH1500AAB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LH1500AAB 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 LH1500AAB?
For technical support, including LH1500AAB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LH1500AAB requirements.
6.How does Aetrix verify that LH1500AAB is sourced from the original manufacturer or authorized distributors?
All LH1500AAB 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 LH1500AAB meets industry standards.
7.What is the process for return or replacement of LH1500AAB?
All LH1500AAB units undergo pre-shipment inspection (PSI). If there is an issue with LH1500AAB, 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 LH1500AAB part is unused and in its original packaging.
Return procedure for LH1500AAB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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