optoisolators

TLP185

Full part number: TLP185GB

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This Toshiba datasheet covers the TLP185GB, a GaAs infrared LED and photo transistor optocoupler in an SO6 package. It is designed for high-density surface mounting in office equipment, PLCs, and AC adapters. Key parameters include 80 V minimum collector-emitter voltage, 3750 Vrms isolation voltage, and a current transfer ratio of at least 50% (rank GB: 100%). The device operates from -55 to 110 degrees Celsius and holds UL, cUL, VDE, and CQC safety approvals.

02 — Key specifications

Datasheet parameters

Parameter	Min	Typ	Max	Conditions
output current	—	50 mA	—
rds on	—	1.01 kOhm	—	VS = 500 V, R.H. ≤ 60%
forward voltage	—	1.25 V	—
operating temperature	-55 °C	—	110 °C
power dissipation	—	200 mW	—
forward current	—	50 mA	—
reverse leakage current	—	—	5 µA	VR = 5 V
breakdown voltage ds	80 V	—	—	IC = 0.5 mA
input capacitance	—	30 pF	—	V = 0 V, f = 1 MHz
isolation voltage	—	10 kV	—	AC, 1 s in oil
rise time	—	2 µs	—	VCC = 10 V, IC = 2 mA, RL = 100 Ω
fall time	—	3 µs	—	VCC = 10 V, IC = 2 mA, RL = 100 Ω
dark current	—	10 nA	80 nA	VCE = 48 V

03 — Alternatives

Closest matches to TLP185

4N35 2.9× lower power dissipation, 2.0× lower dark current, 2.0× lower isolation voltage

PC817 15.0× higher dark current, 3.0× higher rise time, 2.0× lower isolation voltage

LTV-354T 10.0× higher dark current, 2.7× lower isolation voltage, 2.3× lower breakdown voltage ds

MOC3010M 2.4× lower isolation voltage, 2.0× higher output current, 2.0× lower power dissipation

MOC3063S 2.0× lower isolation voltage, 1.2× higher power dissipation, 1.1× higher operating temperature

TCUT1350X01 10.0× lower dark current, 5.3× lower power dissipation, 5.3× higher fall time

TLP7820 2.8× lower power dissipation, 2.0× lower isolation voltage, 1.8× lower fall time

TLP172GM 2.0× higher reverse leakage current, similar input capacitance, similar isolation voltage

04 — FAQ

Frequently asked questions

What is the breakdown voltage ds when IC = 0.5 mA?

The breakdown voltage ds is 80 V when IC = 0.5 mA.

What is the dark current of the TLP185GB when VCE = 48 V?

The dark current is 10 nA at VCE = 48 V.

What is the fall time of the TLP185GB?

The fall time is 3 µs at VCC = 10 V, IC = 2 mA, and RL = 100 Ω.

What is the maximum forward current for the TLP185GB?

The maximum forward current is 50 mA.

What is the forward voltage of the TLP185GB?

The forward voltage is 1.25 V.

What is the input capacitance of the TLP185GB?

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

What is the isolation voltage of the TLP185GB?

The isolation voltage is 10 kV AC, 1 s in oil.

What is the maximum operating temperature for the TLP185GB?

The maximum operating temperature is 110 °C.

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