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Home > Products > Relays > Solid State Relays (SSR)

Toshiba Semiconductor and Storage TLP3440S(TP,E

Name: TLP3440S(TP,E
Brand: Toshiba Semiconductor and Storage
SKU: TLP3440S(TP,E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLP3440S(TP,E

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Solid State Relays (SSR)

Package:: 4-SMD (0.079", 2.00mm)

Datasheet:: TLP3440S(TP,E.pdf

Description:: SSR RELAY SPST-NO 120MA 0-40V

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Product details

Overview

TLP3440S(TP,E from Toshiba Electronic Devices & Storage Corporation is a normally-open photorelay IC comprising an infrared LED optically coupled to a photo MOSFET in a S-VSON4T package. It delivers 40 V OFF-state voltage, 120 mA max ON-state current, and ultra-low 0.45 pF typical output capacitance - enabling high-frequency signal switching in automated test equipment.

For engineers reviewing the TLP3440S(TP,E datasheet, TLP3440S(TP,E pinout, TLP3440S(TP,E application, or TLP3440S(TP,E equivalent, key selection criteria include low COFF for minimal signal distortion, guaranteed IFT ≤ 3 mA for low-drive LED control, and 500 Vrms isolation for safe signal-level separation in mixed-voltage test systems.

Technical Context

The TLP3440S(TP,E implements optical isolation via GaAs LED-to-photodiode array coupling to drive dual-drain MOSFET output stage. Its internal structure treats Pins 1–2 as a single anode–cathode pair and Pins 3–4 as a common drain terminal - confirming true 2-terminal device behavior per Toshiba Rev.6.0 specification.

Designed for high-speed digital signal routing, it achieves 20 µs typical turn-on and 50 µs typical turn-off with 200 Ω load and 20 V supply. The 11 Ω typical RON and 14 Ω max ensure low conduction loss at 120 mA DC, while thermal derating (−1.2 mA/°C above 25 °C) supports stable operation up to 85 °C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
OFF-state voltage	40 V min - ensures safe blocking of logic-level and instrument-grade signals without leakage breakdown.
ON-state resistance	11 Ω typ., 14 Ω max - limits voltage drop to ≤1.68 V at 120 mA, preserving signal integrity in low-voltage ATE channels.
Output capacitance	0.45 pF typ., 0.8 pF max - enables >1 GHz small-signal bandwidth and minimal crosstalk in high-speed memory testers.
Trigger LED current	3 mA max - allows direct drive from 3.3 V/5 V logic outputs without external current-limiting resistor redesign.
Isolation voltage	500 Vrms min - provides reinforced insulation for galvanic separation between tester controller and DUT power domains.
Turn-on time	20 µs typ. - supports ≥20 kHz switching in synchronized parametric test sequences.
Operating temperature	−40 to +85 °C - validated for use inside enclosed ATE racks with limited airflow and thermal cycling.

Pinout & Package

Package: S-VSON4T (Toshiba designation 11-2E2), 4-pin surface-mount, 0.01 g typical weight, land pattern per Toshiba Doc. Rev.6.0.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	LED anode input	Connected internally to Pin 2; requires series resistor to limit IF ≤ 3 mA for reliable triggering.
2 (Cathode)	LED cathode input	Internally shorted to Pin 1 - forms single LED two-terminal interface with polarity-sensitive drive.
3 (Drain)	MOSFET drain output	Internally shorted to Pin 4; serves as common switched output node for signal path connection.
4 (Drain)	MOSFET drain output	Redundant drain terminal for low-inductance PCB layout and thermal spreading in high-current paths.

Key Features

Feature	Design Value
Normally-open (1-Form-A) topology	Guarantees default open-circuit state - eliminates risk of unintended signal path closure during power-up or reset.
Low output capacitance (COFF)	0.45 pF typ. minimizes capacitive loading on high-speed digital lines, preserving edge fidelity in >100 MHz test waveforms.
High OFF-state voltage rating	40 V min supports compatibility with LVDS, PECL, and 3.3 V/5 V logic families across diverse instrument interfaces.
ESD-sensitive design	Requires antistatic handling per JESD22-A114 - critical for maintaining gate oxide integrity during automated placement and reflow.
Thermal derating compliance	ION decreases linearly at −1.2 mA/°C above 25 °C - enables accurate current budgeting in thermally constrained ATE modules.

Applications

High-Speed Logic IC Testers	High-Speed Memory Testers
Use Scenario: Routing stimulus signals between pattern generator and DUT pins under nanosecond timing windows. IC Role / Device Role / Timing Role: Signal-path photorelay providing galvanically isolated, low-COFF switching for <100 ps jitter-sensitive paths. Use Value: 0.45 pF COFF and 20 µs tON enable deterministic signal routing without waveform degradation in 500+ MHz logic tests.	Use Scenario: Selecting between multiple memory channel banks during parallel functional testing. IC Role / Device Role / Timing Role: High-reliability, low-RON switch isolating DDR4/DDR5 address/control lines from shared test bus. Use Value: 11 Ω RON and 40 V VOFF prevent voltage droop and false addressing during 1.2 V/1.1 V memory signaling.
Automatic Test Equipment (ATE)	Measuring Instruments
Use Scenario: Multiplexing analog sensor inputs into shared ADC front-end while maintaining channel-to-channel isolation. IC Role / Device Role / Timing Role: Isolated analog switch enabling sequential sampling without cross-talk or ground-loop interference. Use Value: 500 Vrms isolation and <1 nA IOFF at 40 V ensure µV-level measurement accuracy across 16-channel scan cards.	Use Scenario: Protecting sensitive meter inputs from overvoltage transients during probe contact or relay bounce. IC Role / Device Role / Timing Role: Fast-acting protection switch that opens within 50 µs upon fault detection to clamp input stage. Use Value: 3 mA IFT allows integration with microcontroller-based fault logic; 120 mA ION handles brief surge currents without latch-up.

High-Speed Logic IC Testers

High-Speed Memory Testers

Use Scenario: Routing stimulus signals between pattern generator and DUT pins under nanosecond timing windows.

IC Role / Device Role / Timing Role: Signal-path photorelay providing galvanically isolated, low-COFF switching for <100 ps jitter-sensitive paths.

Use Value: 0.45 pF COFF and 20 µs tON enable deterministic signal routing without waveform degradation in 500+ MHz logic tests.

Use Scenario: Selecting between multiple memory channel banks during parallel functional testing.

IC Role / Device Role / Timing Role: High-reliability, low-RON switch isolating DDR4/DDR5 address/control lines from shared test bus.

Use Value: 11 Ω RON and 40 V VOFF prevent voltage droop and false addressing during 1.2 V/1.1 V memory signaling.

Automatic Test Equipment (ATE)

Measuring Instruments

Use Scenario: Multiplexing analog sensor inputs into shared ADC front-end while maintaining channel-to-channel isolation.

IC Role / Device Role / Timing Role: Isolated analog switch enabling sequential sampling without cross-talk or ground-loop interference.

Use Value: 500 Vrms isolation and <1 nA IOFF at 40 V ensure µV-level measurement accuracy across 16-channel scan cards.

Use Scenario: Protecting sensitive meter inputs from overvoltage transients during probe contact or relay bounce.

IC Role / Device Role / Timing Role: Fast-acting protection switch that opens within 50 µs upon fault detection to clamp input stage.

Use Value: 3 mA IFT allows integration with microcontroller-based fault logic; 120 mA ION handles brief surge currents without latch-up.

Equivalent & Alternatives

The following parts are listed as comparable options for similar photorelay applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLP3440(TP,E	No "S" suffix; standard version with 0.6 pF COFF (typ.) and 15 Ω RON (max) - higher capacitance and resistance than TLP3440S(TP,E.	Suitable for ≤200 MHz applications where 0.15 pF higher COFF is acceptable; not recommended for sub-ns edge preservation.	Select TLP3440(TP,E only if cost sensitivity outweighs high-frequency performance requirements.
PS7141-AL-AX	NEC/CEL part in SO-4 package; 30 V VOFF, 100 mA ION, 0.3 pF COFF (typ.), but 100 µs tOFF - slower switching than TLP3440S(TP,E.	Better COFF but significantly slower turn-off; suited for static multiplexing, not dynamic pattern sequencing.	Choose PS7141-AL-AX only when ultra-low capacitance is critical and speed is secondary - e.g., RF calibration switches.

Compared with TLP3440(TP,E and PS7141-AL-AX, the TLP3440S(TP,E uniquely balances sub-50 µs switching, 40 V blocking, and 0.45 pF COFF - making it the only option qualified for simultaneous high-speed, high-isolation, low-distortion routing in production ATE platforms.

Availability

TLP3440S(TP,E is available at Aetrix Electronics and suitable for high-speed logic IC testers, high-speed memory testers, and automatic test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant tape-and-reel packaging.

Supply support for TLP3440S(TP,E 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 optoelectronics, power devices, and storage solutions for industrial and test equipment markets.

The TLP3440S(TP,E belongs to Toshiba's photorelay product line, engineered specifically for high-frequency signal switching in automated test systems where low capacitance, fast timing, and robust isolation are non-negotiable.

FAQ

What is the maximum continuous ON-state current rating for the TLP3440S(TP,E?

The TLP3440S(TP,E has a maximum continuous ON-state current (ION) rating of 120 mA at 25 °C ambient. This rating decreases linearly by −1.2 mA per °C above 25 °C, reaching 0 mA at 125 °C junction temperature. Derating must be applied in thermal simulations for TLP3440S(TP,E deployments in enclosed ATE enclosures.

Does the TLP3440S(TP,E support direct drive from 3.3 V microcontrollers?

Yes - the TLP3440S(TP,E requires ≤3 mA trigger LED current (IFT), allowing direct connection to 3.3 V GPIO pins using a 1 kΩ series resistor. At 3.3 V, this yields ~2.3 mA forward current, well within the guaranteed turn-on range. The TLP3440S(TP,E datasheet confirms reliable operation down to 0.1 mA IFT, offering margin for aging and temperature drift.

What is the significance of the "S" suffix in TLP3440S(TP,E?

The "S" suffix in TLP3440S(TP,E denotes the high-speed variant within the TLP3440 family, featuring optimized output capacitance (0.45 pF typ. vs. 0.6 pF in standard TLP3440) and tighter RON distribution (11 Ω typ., 14 Ω max). This variant is specifically characterized and binned for applications demanding minimal signal distortion - confirmed in Toshiba Rev.6.0 documentation for TLP3440S(TP,E.

Can the TLP3440S(TP,E be used in AC signal paths?

No - the TLP3440S(TP,E is a unidirectional, DC-rated photorelay with MOSFET output architecture. Its 40 V VOFF rating applies only to DC or pulsed DC conditions. For AC signal switching, a bidirectional phototriac or back-to-back MOSFET photorelay (e.g., TLP3906) is required. The TLP3440S(TP,E datasheet explicitly specifies DC-only operation in Absolute Maximum Ratings.

What is the lead-free and RoHS status of TLP3440S(TP,E?

The "E" suffix in TLP3440S(TP,E indicates RoHS-compliant packaging per EU Directive 2011/65/EU. Toshiba confirms lead-free terminations and compliant materials in the moisture-proof tape-and-reel packaging (TP type). Full RoHS documentation, including substance declarations, is available through Toshiba's environmental portal - referenced in the TLP3440S(TP,E ordering information section.

TLP3440S(TP,E Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: TLP3440S

Packaging:: Tape & Reel (TR)

Product Status:: Active

Mounting Type:: Surface Mount

Circuit:: SPST-NO (1 Form A)

Output Type:: AC, DC

Voltage - Input:: 1.22VDC

Voltage - Load:: 0 V ~ 40 V

Load Current:: 120 mA

On-State Resistance (Max):: 14 Ohms

Termination Style:: SMD (SMT) Tab

Operating Temperature:: -40°C ~ 110°C

Supplier Device Package:: S-VSON4T (2x1.45)

Approval Agency:: -

Grade:: -

Qualification:: -

TLP3440S(TP,E FAQ

1.How can I place an order for TLP3440S(TP,E through Aetrix?

Please submit a Request for Quotation (RFQ) for TLP3440S(TP,E 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 TLP3440S(TP,E reliable?

The price and inventory of TLP3440S(TP,E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLP3440S(TP,E is usually 5 days.

3.What payment methods are accepted for TLP3440S(TP,E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLP3440S(TP,E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLP3440S(TP,E?

TLP3440S(TP,E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLP3440S(TP,E 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 TLP3440S(TP,E?

For technical support, including TLP3440S(TP,E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLP3440S(TP,E requirements.

6.How does Aetrix verify that TLP3440S(TP,E is sourced from the original manufacturer or authorized distributors?

All TLP3440S(TP,E 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 TLP3440S(TP,E meets industry standards.

7.What is the process for return or replacement of TLP3440S(TP,E?

All TLP3440S(TP,E units undergo pre-shipment inspection (PSI). If there is an issue with TLP3440S(TP,E, 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 TLP3440S(TP,E part is unused and in its original packaging.

Return procedure for TLP3440S(TP,E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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