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Toshiba Semiconductor and Storage TLP3431(TP,F
- Part No.:
- TLP3431(TP,F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Solid State Relays (SSR)
- Package:
- 4-SMD (0.096", 2.45mm)
- Datasheet:
-
TLP3431(TP,F.pdf
- Description:
- SSR RELAY SPST-NO 450MA 0-20V
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
TLP3431(TP,F from Toshiba Electronic Devices & Storage Corporation is a surface-mount, normally-open photorelay with 1.2 Ω max ON-state resistance, 450 mA max load current, and 500 Vrms isolation voltage. It integrates an infrared LED optically coupled to a photo-MOSFET in a VSON 4-pin package and is designed for high-frequency switching in automatic test equipment and precision measuring instruments.
For engineers reviewing the TLP3431(TP,F datasheet, TLP3431(TP,F pinout, TLP3431(TP,F application, or TLP3431(TP,F equivalent, key selection criteria include low on-resistance for minimal signal distortion, fast 100 µs typical turn-on time, and compact VSON packaging for dense PCB layouts in ATE and memory tester systems.
Technical Context
The TLP3431(TP,F implements optical isolation using an integrated GaAs infrared LED driving a monolithic photo-MOSFET die. Its dual-drain output configuration (pins 3 and 4 shorted) supports high-current, low-voltage switching with minimal parasitic capacitance (5 pF typ.) and negligible charge injection.
This photorelay operates as a two-terminal device: pins 1 and 2 form the input LED anode/cathode pair, while pins 3 and 4 serve as parallel-connected output drains. It requires ≤3 mA trigger current and sustains up to 20 V OFF-state voltage without leakage exceeding 12 nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON-state resistance | 0.8 Ω typ., 1.2 Ω max - enables low insertion loss and minimal I²R heating at 450 mA loads |
| Isolation voltage | 500 Vrms min - provides reinforced safety barrier between control and load circuits |
| Trigger LED current | ≤3 mA max - reduces drive circuit power and simplifies microcontroller GPIO interfacing |
| Output capacitance | 5 pF typ. - preserves signal integrity in >10 MHz switching applications like memory testers |
| Turn-on time | 100 µs typ., 400 µs max - supports sub-millisecond test sequencing in ATE systems |
| OFF-state voltage | 20 V min - accommodates logic-level and low-voltage analog signal routing |
| Input forward voltage | 1.27 V typ. at 10 mA - ensures efficient LED drive with standard 3.3 V or 5 V supply rails |
Pinout & Package
Housed in a VSON (Very Small Outline No-lead) 4-pin package (Toshiba designation: 11-2D1A), the TLP3431(TP,F uses a 2.0 × 1.25 mm footprint with exposed thermal pad and 0.5 mm pitch. The package is RoHS-compliant and moisture-sensitive level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | LED anode input - connect to current-limited source (e.g., MCU GPIO + series resistor) |
| 2 | Cathode | LED cathode return - tie to ground or active-low driver for optical triggering |
| 3 | Drain | Photo-MOSFET drain terminal - paralleled internally with Pin 4 for higher current handling |
| 4 | Drain | Photo-MOSFET drain terminal - electrically identical to Pin 3 per datasheet Note 1 |
Key Features
| Feature | Design Value |
|---|---|
| Normally-open (1-Form-A) topology | Zero static current flow when de-energized - eliminates standby power loss and prevents unintended signal coupling |
| Low ON-state resistance | 0.8 Ω typical - maintains <100 mV drop at 125 mA, critical for precision voltage/current measurement paths |
| Ultra-low output capacitance | 5 pF typical - minimizes timing skew and crosstalk in high-speed digital ATE channel switching |
| High isolation voltage | 500 Vrms - meets reinforced insulation requirements for Class I medical and industrial test instrumentation |
| Compact VSON package | 2.0 × 1.25 mm footprint - enables dense channel count on PCBs where space is constrained by probe card interfaces |
Applications
| ATE Channel Switching | Logic IC Tester Signal Routing |
|---|---|
|
Use Scenario: Selecting individual DUT channels in automated test handlers with 100+ parallel test sites. IC Role / Device Role / Timing Role: Solid-state relay isolating and routing TTL/CMOS signals between tester controller and DUT pins. Use Value: 100 µs typical turn-on time enables sub-millisecond channel reconfiguration, increasing test throughput by >15% versus electromechanical relays. |
Use Scenario: Multiplexing stimulus and response signals across multiple logic ICs under test in high-speed functional testers. IC Role / Device Role / Timing Role: Bidirectional analog switch providing galvanic isolation between tester drivers and DUT I/Os. Use Value: 5 pF output capacitance preserves signal edge rates up to 100 MHz, preventing false pass/fail due to timing margin erosion. |
| Memory Tester Load Board | Precision Multimeter Input Protection |
|
Use Scenario: Isolating and conditioning address/data bus lines during DDR4/LPDDR5 memory parametric testing. IC Role / Device Role / Timing Role: Low-RON photorelay used in load board signal path switching and fault injection circuits. Use Value: 0.8 Ω typical RON limits voltage error to <1 mV at 1 mA sense current, ensuring accurate VREF calibration. |
Use Scenario: Protecting sensitive analog front-end inputs of benchtop multimeters from overvoltage transients during probing. IC Role / Device Role / Timing Role: Normally-open protection switch that disconnects input stage upon fault detection via external comparator. Use Value: 20 V OFF-state rating blocks common-mode surges up to ±15 V without breakdown, preserving ADC linearity and offset stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar photorelay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PVG612A | Higher 3.5 Ω max RON, 10 pF COFF, SO-4 package (3.5 × 4.6 mm) | Lower bandwidth suitability; suited for <5 MHz switching in industrial PLC I/O modules | Choose for cost-sensitive industrial control where size and speed are secondary to long-term reliability |
| APV1121S | 1.0 Ω max RON, 6 pF COFF, same VSON-4 package but 3.5 mA IFT max | Near-identical performance envelope; slightly higher trigger current requirement | Choose when sourcing diversity is required and 0.5 mA higher LED drive margin is acceptable |
Compared with PVG612A and APV1121S, the TLP3431(TP,F delivers the lowest RON and smallest footprint among the three, making it optimal for high-density, high-speed ATE load boards where thermal rise and layout area are critical constraints.
Availability
TLP3431(TP,F is available at Aetrix Electronics and suitable for automatic test equipment, high-speed memory testers, and precision measuring instruments requiring stable component supply, consistent MSL3 handling, and traceable RoHS-compliant sourcing.
Supply support for TLP3431(TP,F 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor components, with core expertise in power devices, logic ICs, and optoelectronics for industrial, automotive, and computing applications.
The TLP3431(TP,F belongs to Toshiba's photorelay product line, engineered specifically for high-speed, low-distortion signal switching in automated test and measurement systems where galvanic isolation and minimal on-resistance are mandatory.
FAQ
What is the maximum continuous load current rating for the TLP3431(TP,F?
The TLP3431(TP,F supports a maximum continuous ON-state current of 450 mA at Ta = 25°C, derating linearly to 0 mA at 110°C per the absolute maximum ratings table. This rating assumes proper PCB copper area for thermal dissipation and operation within recommended conditions (VDD ≤ 16 V, IF ≤ 3 mA). Exceeding this current risks thermal runaway and permanent degradation of the photo-MOSFET channel.
Does the TLP3431(TP,F require external current-limiting resistors on the LED side?
Yes, the TLP3431(TP,F requires an external series resistor to limit LED forward current to ≤3 mA maximum for reliable triggering. For example, with a 3.3 V supply and 1.27 V typical VF, a 680 Ω resistor sets IF ≈ 3.0 mA. Omitting this resistor risks LED overcurrent failure and inconsistent turn-on behavior across temperature and unit variance.
Can the TLP3431(TP,F be used in bidirectional analog signal switching applications?
Yes, the TLP3431(TP,F supports bidirectional analog signal routing because its photo-MOSFET output has symmetrical on-resistance and capacitance characteristics. It maintains <1.2 Ω RON and <5 pF COSS regardless of signal polarity, enabling use in AC-coupled test signal paths, such as RF stimulus/response multiplexing in vector network analyzers.
What is the meaning of "(TP,F" in the full part number TLP3431(TP,F?
The suffix "(TP,F" in TLP3431(TP,F denotes tape-and-reel packaging (TP) and RoHS-compliant finish (F). TP indicates the device is supplied in embossed carrier tape per EIA-481 standard, with 3000 units per reel. F confirms compliance with EU Directive 2011/65/EU on hazardous substances, verified through Toshiba's material declarations and process controls.
How does the TLP3431(TP,F achieve 500 Vrms isolation without a creepage-intensive package?
The TLP3431(TP,F achieves 500 Vrms isolation through internal mold compound composition and precise die-to-die spacing within the VSON-4 package-not external creepage. Toshiba's proprietary encapsulation and internal air gap design meet IEC 60747-5-5 requirements for reinforced insulation, validated by 60-second AC hi-pot testing at 500 Vrms with <1 mA leakage, independent of PCB layout or external barriers.
TLP3431(TP,F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TLP3431
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.27VDC
- Voltage - Load:
- 0 V ~ 20 V
- Load Current:
- 450 mA
- On-State Resistance (Max):
- 1.2 Ohms
- Termination Style:
- SMD (SMT) Tab
- Operating Temperature:
- -40°C ~ 110°C
- Supplier Device Package:
- 4-VSON (1.45x2.45)
- Approval Agency:
- -
- Grade:
- -
- Qualification:
- -
TLP3431(TP,F FAQ
1.How can I place an order for TLP3431(TP,F through Aetrix?
Please submit a Request for Quotation (RFQ) for TLP3431(TP,F 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 TLP3431(TP,F reliable?
The price and inventory of TLP3431(TP,F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLP3431(TP,F is usually 5 days.
3.What payment methods are accepted for TLP3431(TP,F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLP3431(TP,F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLP3431(TP,F?
TLP3431(TP,F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLP3431(TP,F 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 TLP3431(TP,F?
For technical support, including TLP3431(TP,F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLP3431(TP,F requirements.
6.How does Aetrix verify that TLP3431(TP,F is sourced from the original manufacturer or authorized distributors?
All TLP3431(TP,F 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 TLP3431(TP,F meets industry standards.
7.What is the process for return or replacement of TLP3431(TP,F?
All TLP3431(TP,F units undergo pre-shipment inspection (PSI). If there is an issue with TLP3431(TP,F, 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 TLP3431(TP,F part is unused and in its original packaging.
Return procedure for TLP3431(TP,F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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