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Vishay Semiconductor Opto Division LH1520AACTR
- Part No.:
- LH1520AACTR
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Solid State Relays (SSR)
- Package:
- 8-SMD (0.300", 7.62mm)
- Datasheet:
-
LH1520AACTR.pdf
- Description:
- SSR RELAY SPST-NO 110MA 0-350V
- Quantity:
- Payment:
- Shipping:
Inventory:322
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Product details
Overview
LH1520AACTR from Vishay Semiconductors is a dual-channel, 1 Form A solid-state relay (SSR) with GaAlAs LED input and MOSFET output stages, providing 5300 VRMS isolation, 350 V load voltage rating, and 140 mA per-channel DC load current at 25 °C - used for telecom on/off-hook control and industrial signal switching.
For engineers reviewing the LH1520AACTR datasheet, LH1520AACTR pinout, LH1520AACTR application, or LH1520AACTR equivalent, this device delivers bounce-free SPST switching, low 22 Ω typical on-resistance, and safety-certified insulation for telecom and instrumentation designs requiring reliable galvanic separation.
Technical Context
The LH1520AACTR integrates two independent optically isolated MOSFET switches, each driven by a GaAlAs infrared LED. Its dual-channel architecture enables simultaneous or independent control of two AC/DC loads up to 350 V and 140 mA (single channel) or 100 mA (dual channel).
It meets UL 1577, DIN EN 60747-5-5 (VDE 0884-5), CQC GB4943.1, and BSI safety standards, with 5300 VRMS isolation voltage, 8000 Vpeak transient withstand, and ≥10¹² Ω isolation resistance at 25 °C - confirming suitability for reinforced insulation in Class I equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5300 VRMS - certified for reinforced insulation per UL 1577 and VDE 0884-5, enabling safe operation in mains-connected telecom interfaces. |
| Load Voltage Rating | 350 V - supports direct switching of POTS line voltages including ring signals and ground-start circuits without external snubbers. |
| On-Resistance (RON) | 22 Ω typical - ensures <11 mW conduction loss at 100 mA load, minimizing self-heating in compact PCB layouts. |
| Turn-On/Off Time | 0.13 ms / 0.05 ms typical - enables precise timing control for dial pulse generation and fast telecom signaling sequences. |
| Input Forward Current (IFon) | 0.25 mA typical - allows direct drive from low-power microcontrollers or logic gates without external current amplification. |
| Off-State Leakage | <1 nA at ±100 V, 6 nA at ±350 V - guarantees high impedance blocking for sensitive analog measurement paths in instrumentation. |
| Output Capacitance (CO) | 39 pF at 1 V, 6 pF at 50 V - low capacitive coupling preserves signal integrity in high-frequency telecom switching applications. |
Pinout & Package
SMD-8 surface-mount package (JEDEC MS-012AC variant), 9.80 mm × 6.65 mm footprint, 1.00 mm nominal height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | LED Anode / Cathode (Channel 1) | Optically coupled input 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 | Load Terminal (S1, S1′) | Source-drain path for Channel 1 MOSFET output; bidirectional for AC/DC loads up to 350 V. |
| 7, 8 | Load Terminal (S2, S2′) | Source-drain path for Channel 2 MOSFET output; fully isolated from Channel 1 outputs and inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SPST switches | Enables concurrent control of two telecom line functions (e.g., hook switch + ring delay) without shared failure modes. |
| Clean bounce-free switching | Eliminates mechanical contact arcing and wear, ensuring >10⁹ operations lifetime in automated test equipment. |
| Low 0.25 mA turn-on threshold | Reduces MCU GPIO current burden and simplifies interface design in battery-powered remote terminals. |
| 5300 VRMS isolation | Meets reinforced insulation requirements for connection to public switched telephone network (PSTN) interfaces. |
| 140 mA per-channel load current | Supports full-current operation of legacy electromechanical relays in telecom line card replacements. |
Applications
| Telecom Line Interface | Industrial Signal Isolation |
|---|---|
|
Use Scenario: Replacing mechanical relays in PSTN line cards for on-hook/off-hook detection and dial pulse generation. IC Role / Device Role / Timing Role: Dual-channel solid-state relay providing galvanically isolated SPST switching for tip/ring line control. Use Value: Eliminates contact bounce and wear while maintaining compatibility with legacy 350 V ring voltage and 140 mA loop current. |
Use Scenario: Isolating PLC digital I/O channels from field-side 24 V DC sensors and actuators. IC Role / Device Role / Timing Role: Optically isolated MOSFET switch enabling safe, fast, and repeatable control of industrial loads. Use Value: Provides 5300 VRMS isolation and 22 Ω RON to minimize power loss and ensure long-term reliability in harsh EMI environments. |
| Test Equipment Switching | Medical Instrumentation |
|
Use Scenario: Multiplexing signal paths in automated test systems requiring nanosecond-level timing precision and zero contact wear. IC Role / Device Role / Timing Role: Dual-channel bounce-free switch enabling sub-millisecond channel selection with no settling delay. Use Value: Delivers 0.13 ms turn-on time and <1 nA off-state leakage to preserve signal fidelity during high-impedance measurements. |
Use Scenario: Isolating patient-connected sensor inputs from internal digital processing in diagnostic devices. IC Role / Device Role / Timing Role: Safety-rated optocoupler-based relay providing reinforced insulation between patient and system grounds. Use Value: Meets IEC 60601 creepage/clearance requirements (≥7 mm) and VDE 0884-5 transient withstand (8000 Vpeak). |
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 LH1520AAC | Identical electrical specs and pinout; differs only in packaging - supplied in SMD-8 tape-and-reel (1000 units/reel) vs. LH1520AACTR's SMD-8 tube format. | Same functional use in telecom and industrial boards; preferred for high-volume SMT assembly lines requiring automated pick-and-place feed. | Select LH1520AAC when using automated SMT placement; LH1520AACTR suits low-volume prototyping or manual rework due to tube packaging. |
| Toshiba TLP3547 | Single-channel SSR with 400 V load rating, 120 mA current, 5000 VRMS isolation, and 0.2 ms turn-on time - not pin-compatible. | Requires two devices and additional PCB area to match dual-channel functionality; lacks integrated dual-channel timing synchronization. | Choose TLP3547 only if single-channel flexibility or higher 400 V rating is prioritized over space efficiency and dual-channel coordination. |
Compared with LH1520AAC, LH1520AACTR offers identical performance in a tube-packaged form ideal for engineering validation; versus TLP3547, it delivers true dual-channel integration with tighter timing correlation and lower board area cost per switch function.
Availability
LH1520AACTR is available at Aetrix Electronics and suitable for telecom line interface, industrial signal isolation, test equipment switching, and medical instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for LH1520AACTR 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 LH1520AACTR belongs to Vishay's LH1520 dual SSR product line, engineered specifically for replacing electromechanical relays in telecom infrastructure, industrial controls, and safety-critical instrumentation where bounce-free, long-life switching is mandatory.
FAQ
What is the maximum ambient temperature for continuous operation of the LH1520AACTR?
The LH1520AACTR supports continuous operation from –40 °C to +85 °C ambient temperature. At +85 °C, its per-channel load current derates to 100 mA (dual-channel mode) or 140 mA (single-channel mode), and its output safety power drops to 600 mW - all values confirmed in the Vishay datasheet Rev. 1.9.
Does the LH1520AACTR support AC load switching?
Yes, the LH1520AACTR supports bidirectional AC load switching up to 350 V peak due to its MOSFET output stage. Its 350 V rating applies to both DC and peak AC voltage, and its clean bounce-free operation eliminates zero-crossing timing constraints - making it suitable for PSTN ring signal control and AC solenoid driving.
What safety certifications does the LH1520AACTR hold?
The LH1520AACTR is certified to UL 1577 (5300 VRMS), cUL, DIN EN 60747-5-5 (VDE 0884-5), CQC GB4943.1, CQC GB8898, BSI, and FIMKO. It achieves reinforced insulation with 7 mm creepage/clearance and 0.4 mm minimum insulation thickness - verified across 100% production testing per VIORM x 1.875 = 1669 Vpeak.
Can the LH1520AACTR replace an electromechanical relay directly on an existing PCB?
Yes, the LH1520AACTR in SMD-8 package matches the footprint and pinout of standard DIP-8 mechanical relays adapted for surface mount - but note that LH1520AACTR uses pins 1–4 for inputs and 5–8 for outputs, requiring verification against legacy layout. Its low 0.25 mA turn-on current and 22 Ω RON simplify drop-in replacement without driver circuit changes.
What is the off-state leakage current specification for the LH1520AACTR at full 350 V load?
At ±350 V load voltage and 25 °C ambient, the LH1520AACTR specifies off-state leakage current (IO) of 6 nA typical and 1000 nA maximum - measured with zero input current. This ultra-low leakage ensures minimal signal corruption in high-impedance analog paths and accurate open-circuit detection in telecom fault monitoring.
LH1520AACTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- LH1520
- Packaging:
- Tape & Reel (TR)
- 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 ~ 350 V
- Load Current:
- 110 mA
- On-State Resistance (Max):
- 20 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SMD
- Approval Agency:
- BSI, CQC, cUL, DIN, FIMKO, UL
- Grade:
- -
- Qualification:
- -
LH1520AACTR FAQ
1.How can I place an order for LH1520AACTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LH1520AACTR 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 LH1520AACTR reliable?
The price and inventory of LH1520AACTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LH1520AACTR is usually 5 days.
3.What payment methods are accepted for LH1520AACTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LH1520AACTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LH1520AACTR?
LH1520AACTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LH1520AACTR 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 LH1520AACTR?
For technical support, including LH1520AACTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LH1520AACTR requirements.
6.How does Aetrix verify that LH1520AACTR is sourced from the original manufacturer or authorized distributors?
All LH1520AACTR 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 LH1520AACTR meets industry standards.
7.What is the process for return or replacement of LH1520AACTR?
All LH1520AACTR units undergo pre-shipment inspection (PSI). If there is an issue with LH1520AACTR, 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 LH1520AACTR part is unused and in its original packaging.
Return procedure for LH1520AACTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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