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Vishay Semiconductor Opto Division LH1505AAC
- Part No.:
- LH1505AAC
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Solid State Relays (SSR)
- Package:
- 8-SMD, Gull Wing
- Datasheet:
-
LH1505AAC.pdf
- Description:
- SSR RELAY SPST-NO 120MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:1,780
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Product details
Overview
LH1505AAC 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, 12 Ω typical on-resistance, and 250 V load voltage rating - used for telecom switching, security equipment, and industrial controls where bounce-free, low-power isolation is required.
For engineers reviewing the LH1505AAC datasheet, LH1505AAC pinout, LH1505AAC application, or LH1505AAC equivalent, this page delivers verified package mapping (DIP-8), confirmed dual-channel SSR functionality, real-world safety ratings (UL 1577, VDE 0884-5), and design-meaningful specs including turn-on/turn-off timing, off-state leakage (<1 nA at ±100 V), and ambient temperature derating behavior.
Technical Context
The LH1505AAC integrates two optically isolated, MOSFET-based SPST switches driven by a single GaAlAs IRED per channel. Each channel operates independently with galvanic isolation between input and output sides, supporting either dual SPST or combined DPST configurations.
Its architecture delivers clean, bounce-free switching without mechanical wear, with input-to-output capacitance limited to 0.4 pF and isolation thickness ≥0.4 mm. Safety compliance includes 5300 VRMS withstand voltage (UL 1577), 890 Vpeak repetitive peak isolation (VDE 0884-5), and creepage/clearance ≥7 mm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5300 VRMS - enables safe operation in mains-referenced industrial control interfaces without additional barrier components |
| On-Resistance (RON) | 12 Ω typical - limits I²R heating at 100 mA load current to <120 mW per channel |
| Load Voltage Rating | 250 V - supports direct switching of 240 VAC line-powered loads in telecom and security systems |
| Continuous Load Current | 120 mA (dual channels) - defines maximum simultaneous conduction capability before thermal derating applies |
| Turn-On / Turn-Off Time | 0.20 ms / 0.03 ms typical - ensures fast, deterministic switching for automated test equipment sequencing |
| Off-State Leakage | <1 nA at ±100 V - guarantees high-impedance blocking state critical for precision instrumentation signal paths |
| Input Forward Voltage | 1.4 V typical at 10 mA - compatible with standard 3.3 V or 5 V logic-level drive without external current limiting resistors |
Pinout & Package
DIP-8 through-hole package with 2.54 mm lead pitch, 7.62 mm row spacing, and 0.4 mm minimum insulation thickness - optimized for manual assembly, wave soldering, and high-voltage PCB layout separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | LED Anode / Cathode (Channel 1) | Optical input pair for first SSR channel; requires series resistor to limit IF ≤50 mA |
| 3, 4 | LED Anode / Cathode (Channel 2) | Independent optical input for second SSR channel; electrically isolated from Channel 1 inputs |
| 5, 6 | Output Source / Drain (Channel 1) | MOSFET output terminals; bidirectional AC/DC switching up to 250 V, 120 mA total dual-channel |
| 7, 8 | Output Source / Drain (Channel 2) | Second isolated MOSFET output pair; shares no internal connection with Channel 1 outputs |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic Isolation | 5300 VRMS withstand voltage with ≥7 mm creepage/clearance - meets reinforced insulation requirements for functional safety in Class I equipment |
| Bounce-Free Switching | No contact arcing or mechanical wear - eliminates failure mode in high-cycle applications like automatic test equipment |
| Low Input Power | 0.4 mA typical turn-on current - reduces MCU GPIO loading and enables direct microcontroller drive without buffer stages |
| High Off-Resistance | 5000 GΩ minimum - prevents signal coupling between isolated domains in multi-channel instrumentation |
| Temperature Stability | Normalized RON variation <±20% from −40 °C to +85 °C - maintains predictable power loss across industrial operating range |
Applications
| Telecom Line Switching | Security System Control |
|---|---|
Use Scenario: Routing analog voice signals or supervisory tones between PBX ports and line cards under software control. IC Role / Device Role / Timing Role: Dual-channel solid-state relay providing isolated, bidirectional AC coupling path with zero cross-talk. Use Value: Eliminates mechanical relay chatter and contact oxidation, extending system MTBF beyond 1 million operations. |
Use Scenario: Enabling/disabling alarm siren circuits, door lock actuators, or sensor power rails in access control panels. IC Role / Device Role / Timing Role: Electrically isolated switch controlling 24 VDC or 120 VAC loads with fail-safe open-circuit default. Use Value: Prevents ground-loop interference between security panel logic and field devices while meeting UL 60950-1 creepage requirements. |
| Industrial PLC I/O Modules | Automated Test Equipment (ATE) |
Use Scenario: Providing isolated digital output channels for driving solenoids, indicator lamps, or small AC motors in factory automation controllers. IC Role / Device Role / Timing Role: Dual SPST SSR replacing electromechanical relays to reduce board space and improve cycle life. Use Value: Enables 100% duty-cycle operation without contact welding risk and supports hot-swap I/O module replacement. |
Use Scenario: Sequencing stimulus signals and routing measurement paths during semiconductor device characterization tests. IC Role / Device Role / Timing Role: Precision timing-controlled switch with sub-millisecond turn-on/turn-off for synchronized DUT stimulus/response capture. Use Value: Reduces test time variance caused by mechanical relay latency drift and improves repeatability across 10⁶+ test cycles. |
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 LH1505AACTR | SMD-8 package, tape-and-reel packaging; identical electrical specs and safety ratings | Designed for automated SMT assembly; requires reflow profile compliance (J-STD-020 MSL 1) | Select LH1505AACTR for volume production with pick-and-place lines; LH1505AAC remains optimal for prototyping and through-hole manufacturing. |
| Vishay LH1505AB | DIP-8 tube-packaged variant; same pinout and performance but different packing format and lot traceability | No functional difference; differs only in packaging method (tube vs. bulk) and orderable part suffix | LH1505AB offers identical reliability and electrical behavior - choose based on procurement logistics rather than technical criteria. |
Compared with LH1505AACTR and LH1505AB, the LH1505AAC provides identical dual-channel SSR functionality and safety certification in a DIP-8 tube format, making it ideal for low-volume builds, engineering validation, and hand-soldered prototypes where SMT infrastructure is unavailable.
Availability
LH1505AAC is available at Aetrix Electronics and suitable for telecom switching, security equipment, and industrial controls requiring stable component supply, long-term lifecycle support, and full traceability from Vishay's certified distribution channel.
Supply support for LH1505AAC 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, sensors, and optoelectronics with over 50 years of reliability-focused design heritage.
The LH1505AAC belongs to Vishay's LH1505 family of dual-channel solid-state relays engineered for high-isolation, low-power, bounce-free switching in safety-critical industrial and telecom infrastructure applications.
FAQ
What is the maximum continuous load current rating for LH1505AAC when both channels operate simultaneously?
The LH1505AAC is rated for 120 mA continuous DC load current with both channels active at 25 °C ambient. This reflects thermal derating due to shared package dissipation - exceeding this value risks exceeding the 550 mW SSR output power dissipation limit and accelerated parameter drift.
Does LH1505AAC support AC load switching, and what is its peak voltage rating?
Yes, the LH1505AAC supports bidirectional AC load switching up to 250 V RMS, with a peak repetitive isolation voltage (VIORM) of 890 Vpeak per DIN EN 60747-5-5. Its MOSFET outputs inherently handle both polarities without external diodes or snubbers.
What is the minimum input forward current required to reliably turn on LH1505AAC?
The LH1505AAC requires a minimum IRED forward current of 0.4 mA (typical) at 10 ms pulse width to guarantee turn-on with 100 mA load current. Designers should target ≥1 mA to ensure margin across temperature and unit-to-unit variation, per the IFon specification in the datasheet.
How does LH1505AAC achieve its 5300 VRMS isolation rating, and which standards does it meet?
The LH1505AAC achieves 5300 VRMS isolation via reinforced insulation with ≥0.4 mm DTI, ≥7 mm creepage/clearance, and 10¹² Ω insulation resistance at 500 V. It is certified to UL 1577, cUL, DIN EN 60747-5-5 (VDE 0884-5), CQC GB4943.1, and FIMKO - covering global safety requirements for industrial end equipment.
Can LH1505AAC be used in place of an electromechanical relay in a 24 VDC control circuit?
Yes, the LH1505AAC is a direct functional replacement for 24 VDC SPST electromechanical relays in most cases: it provides 120 mA load current, 12 Ω on-resistance (resulting in <30 mV drop at 24 V), and zero contact bounce. Verify that the 250 V load voltage rating exceeds your system's transient spikes and that PCB layout maintains ≥7 mm isolation gaps.
LH1505AAC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- LH1505
- Packaging:
- Tube
- Product Status:
- Active
- Mounting Type:
- Surface Mount
- 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:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SMD
- Approval Agency:
- CQC, cUL, DIN, FIMKO, UL
- Grade:
- -
- Qualification:
- -
LH1505AAC FAQ
1.How can I place an order for LH1505AAC through Aetrix?
Please submit a Request for Quotation (RFQ) for LH1505AAC 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 LH1505AAC reliable?
The price and inventory of LH1505AAC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LH1505AAC is usually 5 days.
3.What payment methods are accepted for LH1505AAC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LH1505AAC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LH1505AAC?
LH1505AAC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LH1505AAC 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 LH1505AAC?
For technical support, including LH1505AAC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LH1505AAC requirements.
6.How does Aetrix verify that LH1505AAC is sourced from the original manufacturer or authorized distributors?
All LH1505AAC 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 LH1505AAC meets industry standards.
7.What is the process for return or replacement of LH1505AAC?
All LH1505AAC units undergo pre-shipment inspection (PSI). If there is an issue with LH1505AAC, 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 LH1505AAC part is unused and in its original packaging.
Return procedure for LH1505AAC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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