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Vishay Semiconductor Opto Division LH1525AABTR
- Part No.:
- LH1525AABTR
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Solid State Relays (SSR)
- Package:
- 6-SMD (0.300", 7.62mm)
- Datasheet:
-
LH1525AABTR.pdf
- Description:
- SSR RELAY SPST-NO 250MA 0-400V
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
LH1525AABTR from Vishay Semiconductors is a surface-mount, 1-Form-A solid-state relay (SSR) with GaAlAs LED input and MOSFET output, rated for 400 V load voltage and 250 mA DC-only continuous load current, featuring 5300 VRMS isolation and clean bounce-free switching - ideal for battery-powered telecom and industrial control interfaces.
For engineers reviewing the LH1525AABTR datasheet, LH1525AABTR pinout, LH1525AABTR application, or LH1525AABTR equivalent, this device offers verified low-drive operation (as low as 0.9 mA turn-on), sub-1 ms switching speed, and SMD-6 packaging compatible with automated assembly - critical for space-constrained, safety-isolated, low-power switching designs.
Technical Context
The LH1525AABTR integrates an infrared GaAlAs LED optically coupled to dual-MOSFET output stage, enabling galvanic isolation without mechanical contacts. Its AC/DC configuration supports up to 125 mA load current, while the DC-only mode delivers lower on-resistance (5–8.25 Ω) and higher current capacity (250 mA).
Switching timing is tightly controlled: typical turn-on time is 0.15 ms at 5 mA LED drive, and turn-off time is 0.05 ms under same conditions. Isolation performance meets UL, cUL, VDE, and FIMKO safety standards with 5300 VRMS withstand voltage and ≥7 mm creepage/clearance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Load Voltage Rating | 400 V - supports direct switching of 240 VAC mains or 350 VDC industrial bus lines without external snubbers |
| DC Continuous Load Current | 250 mA - enables driving solenoids, small relays, or logic-level loads in portable equipment |
| Input Turn-On Current | ≤0.9 mA - allows direct interface with ultra-low-power microcontrollers or coin-cell-supplied circuits |
| Isolation Withstand Voltage | 5300 VRMS - satisfies reinforced insulation requirements for IEC 61000-4-5 surge immunity and functional safety systems |
| On-Resistance (DC mode) | 5–8.25 Ω - limits power dissipation to <150 mW at 250 mA, reducing thermal design burden |
| Turn-On / Turn-Off Time | 0.15 ms / 0.05 ms - supports PWM-based dimming or high-speed sequencing in programmable logic controllers |
| Package | SMD-6 - RoHS-compliant, lead-free surface-mount package with 2.54 mm pitch, optimized for reflow soldering per J-STD-020 |
Pinout & Package
SMD-6 package with gull-wing leads; 7.62 mm row spacing, 9.80 mm × 6.65 mm body size, 0.25 mm max lead coplanarity. Pin 1 marked by notch and silkscreen dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | LED Anode Input | Connects to MCU GPIO or driver IC output; requires series resistor to limit IF ≤50 mA |
| 2 (Cathode) | LED Cathode Input | Ground reference for LED circuit; polarity-sensitive - reverse connection blocks activation |
| 3 (Source) | MOSFET Source Terminal | Common return path for load current; tied to system ground in low-side switch configuration |
| 4 (Drain) | MOSFET Drain Terminal | High-side load connection point; handles full 400 V load voltage swing |
| 5 (NC) | No Connect | Internally unconnected; must remain floating - no PCB trace or component attachment |
| 6 (NC) | No Connect | Internally unconnected; must remain floating - ensures isolation integrity and avoids parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Low operating current | 0.9 mA LED drive enables direct interfacing with 1.8 V/3.3 V MCUs without level-shifting or amplification |
| Clean bounce-free switching | No contact arcing or mechanical wear ensures >10⁹ operations lifetime and EMI-free signal transitions |
| 5300 VRMS isolation | Meets reinforced insulation requirements for medical, industrial, and telecom equipment per UL 1577 and EN 60747-5-5 |
| Surface mountable SMD-6 | Enables fully automated PCB assembly and eliminates through-hole drilling; footprint matches JEDEC MS-012AC |
| DC-only configuration mode | Optimized MOSFET channel design achieves 5 Ω on-resistance and 250 mA current - superior to AC/DC mode for battery systems |
Applications
| Telecom Line Switching | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Remote line seizure and loop closure in VoIP gateways and PBX interface cards. IC Role / Device Role / Timing Role: Solid-state relay providing isolated, low-power control of POTS line signaling paths. Use Value: Eliminates coil inrush current and contact wear, extending field life beyond 10 years in unattended deployments. |
Use Scenario: Power-path enable/disable in handheld multimeters and portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Low-quiescent-current load switch isolating measurement circuits from main battery rail. Use Value: 0.9 mA turn-on threshold preserves battery runtime; 250 mA DC rating supports active analog front-end biasing. |
| Programmable Logic Controller I/O | Industrial Sensor Interface Modules |
Use Scenario: Digital output module driving 24 VDC solenoid valves and indicator lamps in factory automation racks. IC Role / Device Role / Timing Role: Isolated, fast-switching SSR replacing electromechanical relays in DIN-rail-mounted PLC backplanes. Use Value: 0.15 ms turn-on time enables precise timing-critical actuation; 5300 VRMS isolation protects controller core from field-side transients. |
Use Scenario: Signal path isolation between 4–20 mA sensor transmitters and analog input conditioning stages. IC Role / Device Role / Timing Role: Safety-rated switch enabling calibration loop disconnect and fault isolation during maintenance. Use Value: 5000 GΩ off-resistance prevents leakage-induced offset errors; NC pins ensure no unintended coupling into sensitive analog nodes. |
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 600 V load rating but 150 mA DC current; DIP-6 package only; slower 0.5 ms turn-on | Better suited for 480 VAC industrial motor controls where voltage margin outweighs speed needs | Select VO3120 when 400 V rating is insufficient and board space permits through-hole mounting |
| IXYS CPC1976Y | Same SMD-6 package; 400 V/150 mA rating; 1.2 mA min. turn-on current; 10 pF output capacitance vs. 6–39 pF in LH1525AABTR | Lower drive sensitivity and higher CO limit use in high-frequency switching or RF-adjacent layouts | Choose CPC1976Y only if legacy compatibility with existing footprint is required and 250 mA load current is not needed |
Compared with VO3120 and CPC1976Y, the LH1525AABTR uniquely balances ultra-low drive (0.9 mA), high DC current (250 mA), and SMD-6 manufacturability - making it optimal for next-generation portable and modular industrial electronics where power efficiency, density, and reliability are co-prioritized.
Availability
LH1525AABTR is available at Aetrix Electronics and suitable for telecom line switching, battery-powered test equipment, and programmable controller I/O requiring stable component supply, long-lifecycle assurance, and full traceability.
Supply support for LH1525AABTR 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 leadership in reliability-tested, safety-certified solutions.
The LH1525AABTR belongs to Vishay's LH-series solid-state relays, engineered specifically for replacing electromechanical relays in space-constrained, low-power, and safety-isolated applications across telecom, industrial, and instrumentation markets.
FAQ
What is the minimum LED forward current required to activate the LH1525AABTR?
The LH1525AABTR activates with as little as 0.9 mA LED forward current under standard test conditions (IL = 100 mA, t = 10 ms). This ultra-low threshold enables direct drive from low-power microcontrollers and extends battery life in portable systems. The LH1525AABTR maintains reliable turn-on down to 0.001 mA in off-state leakage tests, confirming robust optical coupling efficiency.
Can the LH1525AABTR switch AC loads, and what are its limitations?
Yes, the LH1525AABTR supports AC/DC configurations with a 400 V peak load voltage rating and 125 mA continuous AC/DC current. However, its AC-mode on-resistance is higher (22–36 Ω) than DC mode (5–8.25 Ω), resulting in greater conduction loss. For pure AC switching above 60 Hz, ensure load voltage remains within derated limits per Fig. 5 and avoid zero-crossing-sensitive applications due to lack of built-in zero-voltage switching.
What safety certifications does the LH1525AABTR hold, and how do they impact system design?
The LH1525AABTR is certified to UL 1577 (5300 VRMS), cUL, VDE EN 60747-5-5, and FIMKO standards, with ≥7 mm creepage and clearance and 0.4 mm minimum insulation thickness. These ratings allow its use in reinforced insulation barriers without additional protective components - simplifying compliance for Class I/II medical devices, industrial PLCs, and telecom infrastructure meeting IEC 61000-4-5 Level 4 surge immunity.
How does the LH1525AABTR handle thermal management in continuous operation?
The LH1525AABTR dissipates up to 550 mW continuously in SSR output mode, with safe operating area defined by ambient temperature and load current. At 25 °C, it supports full 250 mA DC current; at 85 °C, maximum DC load drops to ~140 mA per Fig. 5. PCB layout must provide ≥1 cm² copper pour under pins 3–4 and avoid enclosing the device in sealed enclosures without airflow.
Are pins 5 and 6 on the LH1525AABTR internally connected or usable as auxiliary terminals?
Pins 5 and 6 on the LH1525AABTR are explicitly designated as "No Connect" (NC) in the datasheet and internal construction - they are unconnected to any internal circuitry. These pins must remain electrically floating on the PCB; routing traces, adding bypass capacitors, or grounding them compromises isolation integrity and may induce leakage or failure. The LH1525AABTR relies on strict NC handling to maintain its 5300 VRMS isolation rating.
LH1525AABTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- LH1525
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.16VDC
- Voltage - Load:
- 0 V ~ 400 V
- Load Current:
- 250 mA
- On-State Resistance (Max):
- 36 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-SMD
- Approval Agency:
- cUL, FIMKO, UL, VDE
- Grade:
- -
- Qualification:
- -
LH1525AABTR FAQ
1.How can I place an order for LH1525AABTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LH1525AABTR 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 LH1525AABTR reliable?
The price and inventory of LH1525AABTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LH1525AABTR is usually 5 days.
3.What payment methods are accepted for LH1525AABTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LH1525AABTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LH1525AABTR?
LH1525AABTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LH1525AABTR 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 LH1525AABTR?
For technical support, including LH1525AABTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LH1525AABTR requirements.
6.How does Aetrix verify that LH1525AABTR is sourced from the original manufacturer or authorized distributors?
All LH1525AABTR 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 LH1525AABTR meets industry standards.
7.What is the process for return or replacement of LH1525AABTR?
All LH1525AABTR units undergo pre-shipment inspection (PSI). If there is an issue with LH1525AABTR, 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 LH1525AABTR part is unused and in its original packaging.
Return procedure for LH1525AABTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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