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Toshiba Semiconductor and Storage TLP170A(F)
- Part No.:
- TLP170A(F)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Solid State Relays (SSR)
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
TLP170A(F).pdf
- Description:
- SSR RELAY SPST-NO 400MA 0-60V
- Quantity:
- Payment:
- Shipping:
Inventory:4,844
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Product details
Overview
TLP170A(F) from Toshiba Electronic Devices & Storage Corporation is a normally-open photorelay IC comprising an infrared LED optically coupled to a photo-MOSFET in a 4-pin SOP package. It requires ≤1 mA LED trigger current, supports up to 400 mA ON-state load current, and provides 60 V OFF-state voltage blocking - enabling low-power solid-state switching in industrial control interfaces.
For engineers reviewing the TLP170A(F) datasheet, TLP170A(F) pinout, TLP170A(F) application, or TLP170A(F) equivalent, key selection criteria include its 2 Ω max ON-resistance, 1500 Vrms isolation rating, SOP-4 footprint compatibility, and suitability for mechanical relay replacement in FA and security equipment where galvanic separation and low drive power are critical.
Technical Context
The TLP170A(F) implements optical isolation between input and output stages using GaAs infrared LED excitation of a silicon photo-MOSFET. Its internal structure treats Pins 1–2 as a single anode–cathode pair and Pins 3–4 as paralleled drain terminals - forming a true 1-Form-A (SPST-NO) switch with no internal gate driver or logic circuitry.
It operates within −40 °C to +85 °C ambient, delivers 3.0 ms typical turn-on time at 20 V/200 Ω load, and maintains <1000 nA OFF-state leakage at 60 V. Derating curves confirm linear current reduction above 25 °C: −4.0 mA/°C for ION and −3.0 mW/°C for output power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Normally-open (1-Form-A) photo-MOSFET switch - no latching; conducts only while LED is forward-biased. |
| OFF-State Voltage | 60 V (min) - supports DC loads up to 48 V supply rails per recommended operating conditions. |
| ON-State Current | 400 mA (max) - sufficient for driving solenoids, small relays, or indicator LEDs in FA systems. |
| ON-State Resistance | 2 Ω (max) - limits conduction loss to ≤320 mW at full rated current (I²R). |
| Trigger LED Current | 1 mA (max) - enables direct drive from low-power microcontroller GPIO without external amplification. |
| Isolation Voltage | 1500 Vrms (min, 60 s) - meets UL 1577 and CSA Component Acceptance requirements for reinforced insulation. |
| Package | SOP-4 (2.54 mm pitch, 2.1 mm height) - surface-mount compatible with standard 0.1″ grid PCB layouts. |
Pinout & Package
Package: SOP-4 (2.54SOP4), 2.1 mm height, 2.54 mm lead pitch, 0.1 g typical weight. Pin 1 = Anode, Pin 2 = Cathode, Pins 3 & 4 = paralleled Drain terminals (output common).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Positive input terminal for infrared LED; connects to MCU GPIO or current-limited driver. |
| 2 | Cathode | LED return path; typically grounded or connected to low-side switch. |
| 3 | Drain | Output switch terminal; electrically tied to Pin 4 - used as single high-side or low-side load connection point. |
| 4 | Drain | Redundant drain terminal; must be connected to same net as Pin 3 to meet rated ION and RON. |
Key Features
| Feature | Design Value |
|---|---|
| Low LED drive requirement | ≤1 mA trigger current enables direct interface with 3.3 V/5 V microcontrollers without buffer stages. |
| Galvanic isolation integrity | 1500 Vrms isolation and 5×1010 Ω min isolation resistance prevent ground-loop noise and protect control-side circuitry. |
| Thermal derating support | Explicit −4.0 mA/°C ION derating curve allows accurate ambient temperature-based current budgeting in enclosed enclosures. |
| Fast switching performance | 3.0 ms typical turn-on and 1.0 ms typical turn-off times suit moderate-speed sequencing in PBX and test instrumentation. |
| Compact SOP-4 footprint | 2.54 mm pitch matches legacy DIP-4 layouts; simplifies board redesign when replacing electromechanical relays. |
Applications
| Factory Automation I/O Modules | Security System Control Panels |
|---|---|
Use Scenario: Isolating PLC digital outputs from 24 V DC field actuators (valves, indicators, sensors) in harsh industrial environments. IC Role / Device Role / Timing Role: Solid-state relay replacement providing galvanic isolation and zero-crossing–free switching for DC loads. Use Value: Eliminates mechanical wear and contact bounce while maintaining 400 mA load capability and 2 Ω conduction loss at full rating. |
Use Scenario: Controlling door lock solenoids, alarm sirens, and motion detector power rails in access control panels. IC Role / Device Role / Timing Role: Input-isolated load switch ensuring control-side MCU safety during fault events like shorted lock coils. Use Value: 1500 Vrms isolation prevents surge propagation from AC-powered peripherals into low-voltage security logic. |
| Programmable Logic Controller (PLC) Backplanes | Test & Measurement Instrumentation |
Use Scenario: Signal routing and channel enable/disable on modular PLC carrier boards with mixed-voltage domains. IC Role / Device Role / Timing Role: Voltage-level translator and domain separator between 3.3 V FPGA logic and 24 V sensor bus lines. Use Value: 1 mA LED drive allows FPGA I/O pin direct drive; 60 V VOFF rating accommodates transient spikes on industrial buses. |
Use Scenario: Auto-ranging multiplexer switching in multimeters and data loggers requiring precise low-leakage signal paths. IC Role / Device Role / Timing Role: Low-capacitance (<130 pF) analog switch with <1000 nA OFF-state leakage at 60 V bias. Use Value: Minimizes measurement error from charge injection and leakage current in high-impedance sensing circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar photorelay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLP170G(F) | Same SOP-4 package and pinout; higher 100 V VOFF rating and 1.5 Ω RON max; identical 1 mA IFT. | Supports higher-voltage DC loads (e.g., 72 V telecom systems); otherwise functionally interchangeable in 48 V and below designs. | Select TLP170G(F) when VOFF margin >10 V is required; no PCB change needed. |
| PVG612A | Dual-channel SOIC-8; 60 V VOFF, 350 mA ION, 2.5 Ω RON; requires 2.5 mA IFT; 3750 Vrms isolation. | Provides two independent switches per package; suited for compact dual-signal isolation but not pin-compatible. | Choose PVG612A only when dual-channel integration justifies SOIC-8 layout revision and higher LED drive overhead. |
Compared with TLP170A(F), TLP170G(F) offers enhanced voltage headroom without layout impact, while PVG612A trades single-channel simplicity for dual functionality and higher isolation - making TLP170A(F) optimal for cost-sensitive, space-constrained 48 V relay-replacement use cases.
Availability
TLP170A(F) is available at Aetrix Electronics and suitable for factory automation I/O modules, security system control panels, and programmable logic controller backplanes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for TLP170A(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 discrete semiconductors, power devices, and optoelectronics with emphasis on reliability, efficiency, and industrial-grade robustness.
The TLP170A(F) belongs to Toshiba's photorelay product line, engineered specifically for replacing electromechanical relays in DC control applications where low power consumption, long service life, and electrical isolation are mandatory.
FAQ
What is the maximum allowable ambient temperature for continuous operation of the TLP170A(F)?
The TLP170A(F) supports continuous operation from −40 °C to +85 °C ambient temperature. At temperatures above 25 °C, both ON-state current and output power dissipation must be linearly derated: −4.0 mA/°C for ION and −3.0 mW/°C for PO. The TLP170A(F) junction temperature must not exceed 125 °C under any condition.
Can the TLP170A(F) safely switch AC loads?
No - the TLP170A(F) is rated for DC-only operation with a maximum OFF-state voltage of 60 V and no zero-crossing detection or bidirectional blocking capability. Its internal photo-MOSFET structure is unidirectional. For AC switching, Toshiba recommends dedicated AC-output photorelays such as the TLP3905 series; the TLP170A(F) must only be used with DC loads.
Is the TLP170A(F) pin-compatible with other Toshiba SOP-4 photorelays like the TLP170B(F)?
Yes - the TLP170A(F) shares identical SOP-4 pinout (Anode/Cathode/Drain/Drain) and mechanical dimensions with TLP170B(F) and TLP170G(F). All three are pin-to-pin compatible; differences lie in electrical ratings (e.g., VOFF, RON, ION) and safety certifications. No PCB layout change is required when substituting within this family.
What is the minimum LED forward current needed to guarantee turn-on of the TLP170A(F)?
The TLP170A(F) guarantees reliable turn-on with ≤1 mA LED forward current (IFT max) at 25 °C. Typical trigger current is 0.4 mA. Designers should ensure ≥2 mA drive (per recommended operating conditions) to maintain margin across temperature and aging; the TLP170A(F) will remain fully enhanced up to 25 mA IF.
Does the TLP170A(F) require an external gate resistor or snubber network?
No - the TLP170A(F) integrates a matched photo-MOSFET with built-in gate termination; no external gate resistor, snubber, or flyback diode is required. However, a series current-limiting resistor for the input LED is mandatory to constrain IF within 2–25 mA (recommended range); the TLP170A(F) itself contains no active protection circuitry beyond its inherent MOSFET characteristics.
TLP170A(F) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TLP170A
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A)
- Output Type:
- AC, DC
- Voltage - Input:
- 1.15VDC
- Voltage - Load:
- 0 V ~ 60 V
- Load Current:
- 400 mA
- On-State Resistance (Max):
- 2 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -25°C ~ 70°C
- Supplier Device Package:
- 4-SOP
- Approval Agency:
- cULus, DNV, TUV, UL
- Grade:
- -
- Qualification:
- -
TLP170A(F) FAQ
1.How can I place an order for TLP170A(F) through Aetrix?
Please submit a Request for Quotation (RFQ) for TLP170A(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 TLP170A(F) reliable?
The price and inventory of TLP170A(F) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLP170A(F) is usually 5 days.
3.What payment methods are accepted for TLP170A(F)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLP170A(F) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLP170A(F)?
TLP170A(F) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLP170A(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 TLP170A(F)?
For technical support, including TLP170A(F) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLP170A(F) requirements.
6.How does Aetrix verify that TLP170A(F) is sourced from the original manufacturer or authorized distributors?
All TLP170A(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 TLP170A(F) meets industry standards.
7.What is the process for return or replacement of TLP170A(F)?
All TLP170A(F) units undergo pre-shipment inspection (PSI). If there is an issue with TLP170A(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 TLP170A(F) part is unused and in its original packaging.
Return procedure for TLP170A(F):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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