optoisolators

TLP172

Full part number: TLP172GM

Every spec below is cited to the manufacturer datasheet. Compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the TLP172 does

The TLP172GM is a photorelay designed for battery management systems, factory automation, and security applications. It combines an infrared LED with a photo-MOSFET in a 4-pin SO6 package. Key specifications include 3750 Vrms isolation voltage, 350 V OFF-state output terminal voltage, and 110 mA maximum ON-state current. The device operates across a temperature range of -40 to 110 degrees Celsius. It serves as a reliable mechanical relay replacement, offering compact space savings for smart meters and measuring instruments while maintaining UL and VDE safety approvals.

Next step
Start building with TLP172 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.
01 — Key specifications

Datasheet parameters

Datasheet parameters for TLP172
ParameterMinTypMaxConditionsSource
output current — — 110 mA Detector Toshiba datasheet, p. 3 — 2018-06-20
operating temperature -40 °C — 110 °C Common Toshiba datasheet, p. 3 — 2018-06-20
forward current — — 30 mA LED Toshiba datasheet, p. 3 — 2018-06-20
input capacitance — 30 pF — V = 0 V, f = 1 MHz; 4 2018-06-20 Toshiba datasheet, p. 5 — 4 2018-06-20
isolation voltage — 10 kV — AC, 1 s in oil; isolation(note 1); 4 2018-06-20 Toshiba datasheet, p. 5 — 4 2018-06-20
02 — Alternatives

Closest matches to TLP172

LTV-217 3.0× higher power dissipation, 1.3× lower operating temperature, similar forward current
LTV-217-G 3.0× higher power dissipation, 1.3× lower operating temperature, similar forward current
TCUT1350X01 1.2× higher operating temperature, similar reverse leakage current
LTR-323DB 5.0× higher reverse voltage, 3.0× higher power dissipation, 1.6× lower operating temperature
03 — FAQ

Frequently asked questions

What is the forward current for the LED?

The forward current for the LED is 30 mA.

What is the input capacitance of the TLP172GM?

The input capacitance is 30 pF at V = 0 V and f = 1 MHz.

What is the isolation voltage of the TLP172GM?

The isolation voltage is 10 kV, measured under AC conditions for 1 second in oil.

What is the maximum operating temperature for the TLP172GM?

The maximum operating temperature is 110 °C under common conditions.

What is the output current of the TLP172GM when used as a Detector?

The output current is 110 mA.

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