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Vishay Semiconductor Opto Division LH1529GPTR
- Part No.:
- LH1529GPTR
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Solid State Relays (SSR)
- Package:
- 8-SOP (0.180", 4.57mm Width)
- Datasheet:
-
LH1529GPTR.pdf
- Description:
- SSR RELAY SPST-NO 120MA 0-350V
- Quantity:
- Payment:
- Shipping:
Inventory:3,225
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Product details
Overview
LH1529GPTR from Vishay Semiconductors is a telecom-grade optically coupled solid-state relay (SSR) with integrated bidirectional optocoupler, designed for on/off hook control and ring detection in PCMCIA and notebook telecom interfaces. It delivers 3000 VRMS input-output isolation, 20 Ω typical on-resistance, 350 V load voltage rating, and 100 % minimum CTR at 6 mA - enabling robust line-powered switching and current sensing in analog telephone line circuits.
For engineers reviewing the LH1529GPTR datasheet, LH1529GPTR pinout, LH1529GPTR application, or LH1529GPTR equivalent, key selection criteria include SSR load capability (120 mA/350 V), optocoupler CTR performance (≥100 %), isolation compliance (UL1577, VDE pending), and SMD-8 flat pak packaging for space-constrained telecom modules.
Technical Context
The LH1529GPTR integrates two functionally independent opto-isolated channels on a monolithic die: a high-voltage SSR switch with current-limit protection and a bidirectional GaAs LED phototransistor channel. Its SSR uses high-voltage silicon technology to sustain ±350 V load transients while limiting surge current to 170–250 mA.
The optocoupler channel employs anti-parallel infrared LEDs enabling bidirectional loop current sensing without polarity dependence, with guaranteed CTR ≥100 % at IF = 6 mA and VCE = 0.5 V - exceeding the 33 % minimum of the LH1529FPTR variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 3000 VRMS - meets UL1577 double protection requirements for telecom safety-critical signal isolation |
| SSR On-Resistance | 20 Ω typical - minimizes I²R loss and voltage drop during 120 mA hook-switch operation |
| Load Voltage Rating | ±350 V - supports full-range analog telephone line signaling including ringing (≈90 V RMS) and off-hook DC (−48 V) |
| CTR (Optocoupler) | ≥100 % at IF = 6 mA - ensures reliable ring detection and loop supervision under low-drive conditions |
| Turn-on/Off Time | 1.3 ms / 0.1 ms - enables clean bounce-free dial pulse generation and fast ring event response |
| Ambient Temp Range | −40 °C to +85 °C - qualified for industrial and portable telecom equipment operating environments |
| Package | SMD-8 flat pak, 0.080" thick - surface-mount compatible with automated assembly and PCMCIA board height constraints |
Pinout & Package
SMD-8 plastic flat pak package, 9.5 mm × 6.96 mm footprint, 0.41 mm lead thickness, gull-wing leads with 2.54 mm pitch and 3°–7° coplanarity tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | SSR Input Anode/Cathode | Drive SSR turn-on via forward-biased LED; bidirectional SSR operation requires external polarity control |
| 3, 4 | Optocoupler Input Anode/Cathode | Anti-parallel GaAs LEDs enable bidirectional current sensing without external bridge rectification |
| 5, 6 | SSR Output Load Terminals | Switches ±350 V AC/DC loads; internal current limit protects against lightning-induced surges |
| 7, 8 | Optocoupler Output Collector/Emitter | Phototransistor output provides isolated current-sense signal; CTR ≥100 % ensures margin at low IF |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic SSR + Optocoupler | Single-die integration eliminates inter-channel timing skew and improves long-term reliability vs. discrete solutions |
| Current-Limit Protection | 170–250 mA trip threshold prevents latch-up or thermal failure during line surges (e.g., lightning transients) |
| Bidirectional Sensing | Anti-parallel LED configuration enables true AC loop current monitoring without external polarity management |
| Clean Switching | 0.1 ms turn-off time and no mechanical bounce ensure accurate dial pulse timing and noise-free hook detection |
| RoHS/WEEE Compliant | Fully compliant per Directive 2011/65/EU - suitable for global telecom equipment certification and recycling programs |
Applications
| PCMCIA Telecom Card | On/Off Hook Control |
|---|---|
|
Use Scenario: Embedded modem card in laptop requiring isolated line interface for PSTN connection. IC Role / Device Role / Timing Role: LH1529GPTR acts as dual-function isolator: SSR switches line connection state; optocoupler senses loop closure and ring signal. Use Value: Enables compact, low-power, ESD-robust design meeting FCC Part 68 requirements with single-component isolation. |
Use Scenario: Controlling telephone line state in VoIP gateway analog interface boards. IC Role / Device Role / Timing Role: LH1529GPTR SSR performs clean, bounce-free hookswitch actuation; optocoupler monitors DC loop current for off-hook detection. Use Value: Eliminates need for separate SSR and optocoupler ICs, reducing BOM count and PCB area by >40 %. |
| Dial Pulse Generation | Ringing Current Detection |
|
Use Scenario: Legacy telephony systems generating rotary-dial pulses using microcontroller-driven switching. IC Role / Device Role / Timing Role: LH1529GPTR SSR provides precise, millisecond-scale make/break control of line current with <2.5 ms turn-on/turn-off. Use Value: Guarantees pulse timing compliance with ITU-T Q.11 (10 ± 1 pulses/sec, 60 ± 5 % break ratio). |
Use Scenario: Detecting incoming ring signals (20 Hz, 90 V RMS) in residential gateways and IP phones. IC Role / Device Role / Timing Role: LH1529GPTR optocoupler channel senses bidirectional ring current; CTR ≥100 % ensures detection at low drive levels. Use Value: Supports reliable ring detection across temperature (−40 °C to +85 °C) without gain compensation circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar telecom switching and sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VO615A-3X006 | Single-channel optocoupler only; no integrated SSR; CTR ≥100 % but lacks 350 V load switching | Requires external high-voltage switch (e.g., MOSFET) for hook control - increases component count and layout complexity | Select when only ring/loop sensing is needed and SSR functionality is implemented elsewhere |
| Vishay VO3120 | Dual-channel SSR-only device; no optocoupler; 400 V load rating but no current sensing capability | Cannot perform ring detection or loop current monitoring - necessitates adding a second optocoupler IC | Select when higher load voltage (400 V) is required and sensing is handled by separate circuitry |
Compared with VO615A-3X006 and VO3120, the LH1529GPTR uniquely combines SSR switching and bidirectional sensing in one RoHS-compliant SMD-8 package - reducing system-level isolation component count by two while maintaining full telecom functional coverage.
Availability
LH1529GPTR is available at Aetrix Electronics and suitable for PCMCIA modem cards, VoIP analog interface boards, and legacy telephony equipment requiring stable component supply, long-lifecycle support, and certified isolation performance.
Supply support for LH1529GPTR 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, precision, and high-voltage performance.
The LH1529GPTR belongs to Vishay's telecom switch product line, engineered specifically for analog telephone line interface applications requiring simultaneous isolation, switching, and current sensing in compact SMD formats.
FAQ
What is the isolation voltage rating of the LH1529GPTR and which safety standards does it meet?
The LH1529GPTR provides 3000 VRMS input-to-output isolation, certified to UL1577 (file E52744, double protection) and compliant with DIN EN 60747-5-2 (VDE 0884) pending approval. This rating ensures safe operation in telecom line interfaces where user-accessible circuits must withstand transient overvoltages up to 3 kV RMS without breakdown or leakage exceeding 100 μA.
Does the LH1529GPTR support bidirectional current sensing, and how is this implemented?
Yes, the LH1529GPTR supports true bidirectional current sensing via two anti-parallel GaAs infrared LEDs in its optocoupler channel. This configuration allows loop current detection regardless of polarity - essential for detecting both ring signals (AC) and off-hook DC loop closure without external rectification, and confirmed in the datasheet electrical characteristics table for CTR testing.
What is the guaranteed CTR for the LH1529GPTR, and how does it differ from the LH1529FPTR variant?
The LH1529GPTR guarantees a minimum DC current transfer ratio (CTR) of 100 % at IF = 6 mA and VCE = 0.5 V, as specified in the Electrical Characteristics table. This is double the 33 % minimum CTR of the LH1529FPTR variant - making the LH1529GPTR more suitable for low-drive or high-temperature ring detection where margin is critical.
Can the LH1529GPTR handle telephone line ringing voltage, and what is its maximum load voltage specification?
Yes, the LH1529GPTR SSR is rated for ±350 V DC or peak AC load voltage, comfortably exceeding standard telephone ringing voltage (typically 86–90 V RMS, ≈250 V peak). Its breakdown voltage remains stable across temperature, and the internal current-limit circuit protects against surge events associated with ringing transients.
What package type and mounting format does the LH1529GPTR use, and is it compatible with reflow soldering?
The LH1529GPTR uses an SMD-8 plastic flat pak package with gull-wing leads, 2.54 mm pitch, and 0.080" thickness. It is fully compatible with standard lead-free reflow soldering profiles (per Vishay document 83828, note 1), with maximum soldering temperature of 260 °C for 10 seconds - supporting automated assembly in telecom module production.
LH1529GPTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- LH1529
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.2VDC
- Voltage - Load:
- 0 V ~ 350 V
- Load Current:
- 120 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, FIMKO, UL
- Grade:
- -
- Qualification:
- -
LH1529GPTR FAQ
1.How can I place an order for LH1529GPTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LH1529GPTR 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 LH1529GPTR reliable?
The price and inventory of LH1529GPTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LH1529GPTR is usually 5 days.
3.What payment methods are accepted for LH1529GPTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LH1529GPTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LH1529GPTR?
LH1529GPTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LH1529GPTR 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 LH1529GPTR?
For technical support, including LH1529GPTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LH1529GPTR requirements.
6.How does Aetrix verify that LH1529GPTR is sourced from the original manufacturer or authorized distributors?
All LH1529GPTR 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 LH1529GPTR meets industry standards.
7.What is the process for return or replacement of LH1529GPTR?
All LH1529GPTR units undergo pre-shipment inspection (PSI). If there is an issue with LH1529GPTR, 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 LH1529GPTR part is unused and in its original packaging.
Return procedure for LH1529GPTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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