optoisolators

MOC308

Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the MOC308 family does

The MOC308x series are six-pin DIP zero-cross optoisolators designed as triac driver outputs. This family spans standard, wide lead spacing, surface mounting, and tape and reel packages across commercial, industrial, and military temperature grades. Key parameters include 5,000V rms isolation voltage, 800V minimum repetitive peak off-state voltage, and a critical rate of rise of 1,000V per microsecond. These components are typically used in AC motor drives, starters, contactors, lighting controls, solenoid and valve controls, solid state relays, static power switches, and temperature control systems.

Next step
Start building with MOC308 → 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.
Ordering code:
01 — Key specifications

MOC3081 datasheet parameters

ParameterMinTypMaxConditionsSource
output current (abs max) — — 100 mA Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward voltage — 1.2 V 1.4 V IF = 20mA; 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta = 25℃ Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
operating temperature (abs max) -40 °C — 110 °C 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
power dissipation (abs max) — — 150 mW collector; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
reverse voltage (abs max) — — 6 V 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward current (abs max) — — 50 mA 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
drain current (abs max) — — 100 mA (rms); 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
isolation voltage (abs max) — — 5 kV isolation; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
dark current — 500 nA — Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
output count — 1 — Lite-On datasheet, p. 2
channel count — 1 — Lite-On datasheet, p. 2
02 — FAQ

MOC3081 frequently asked questions

What is the channel count of the MOC3081?

The channel count is 1.

What is the maximum dark current?

The dark current is 500 nA.

What is the maximum RMS drain current of the MOC3081 at Ta = 25°C?

The maximum RMS drain current is 100 mA.

What is the forward current of the MOC3081 at Ta = 25°C?

The forward current is 50 mA.

What is the forward voltage of the MOC3081 at IF = 20mA and Ta = 25℃?

The forward voltage is 1.2 V.

What is the isolation voltage of the MOC3081?

The isolation voltage is 5 kV at Ta = 25°C.

What is the operating temperature of the MOC3081 at Ta = 25°C?

The operating temperature is 110 °C.

What is the output count of the MOC3081?

The output count is 1.

What is the output current of the MOC3081?

The output current is 100 mA.

What is the maximum power dissipation at the collector when Ta = 25°C?

The power dissipation is 150 mW.

What is the reverse voltage of the MOC3081 at Ta = 25°C?

The reverse voltage is 6 V.

01 — Key specifications

MOC3081M datasheet parameters

ParameterMinTypMaxConditionsSource
output current (abs max) — — 100 mA Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward voltage — 1.2 V 1.4 V IF = 20mA; 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta = 25℃ Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
operating temperature (abs max) -40 °C — 110 °C 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
power dissipation (abs max) — — 150 mW collector; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
reverse voltage (abs max) — — 6 V 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward current (abs max) — — 50 mA 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
drain current (abs max) — — 100 mA (rms); 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
isolation voltage (abs max) — — 5 kV isolation; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
dark current — 500 nA — Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
output count — 1 — Lite-On datasheet, p. 2
channel count — 1 — Lite-On datasheet, p. 2
02 — FAQ

MOC3081M frequently asked questions

What is the channel count of the MOC3081M?

The channel count is 1.

What is the maximum dark current for the MOC3081M?

The dark current is 500 nA.

What is the absolute maximum drain current rating for the MOC3081M at Ta = 25°C?

The absolute maximum drain current is 100 mA (rms) at Ta = 25°C.

What is the absolute maximum forward current rating for the MOC3081M at Ta = 25°C?

The absolute maximum forward current is 50 mA at Ta = 25°C.

What is the forward voltage of the MOC3081M at IF = 20mA and Ta = 25℃?

The forward voltage is 1.2 V.

What is the isolation voltage of the MOC3081M at Ta = 25°C?

The isolation voltage is 5 kV.

What is the operating temperature specified in section 4.1 Absolute Maximum Ratings at Ta = 25°C?

The operating temperature is 110 °C.

What is the output count of the MOC3081M?

The output count is 1.

What is the output current of the MOC3081M?

The output current is 100 mA.

What is the power dissipation at the collector under the condition of 4.1 Absolute Maximum Ratings at Ta = 25°C?

The power dissipation at the collector is 150 mW.

What is the reverse voltage at Ta = 25°C?

The reverse voltage is 6 V.

01 — Key specifications

MOC3081S datasheet parameters

ParameterMinTypMaxConditionsSource
output current (abs max) — — 100 mA Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward voltage — 1.2 V 1.4 V IF = 20mA; 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta = 25℃ Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
operating temperature (abs max) -40 °C — 110 °C 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
power dissipation (abs max) — — 150 mW collector; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
reverse voltage (abs max) — — 6 V 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward current (abs max) — — 50 mA 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
drain current (abs max) — — 100 mA (rms); 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
isolation voltage (abs max) — — 5 kV isolation; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
dark current — 500 nA — Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
output count — 1 — Lite-On datasheet, p. 2
channel count — 1 — Lite-On datasheet, p. 2
02 — FAQ

MOC3081S frequently asked questions

What is the channel count of the MOC3081S?

The channel count is 1.

What is the maximum dark current?

The dark current is 500 nA.

What is the absolute maximum RMS drain current for the MOC3081S at Ta = 25°C?

The absolute maximum RMS drain current is 100 mA at Ta = 25°C.

What is the forward current rating?

The forward current is 50 mA at 4.1 Absolute Maximum Ratings at Ta = 25°C.

What is the forward voltage of the MOC3081S at IF = 20mA and Ta = 25℃?

The forward voltage is 1.2 V.

What is the isolation voltage of the MOC3081S?

The isolation voltage is 5 kV at Ta = 25°C.

What is the operating temperature specified in section 4.1 Absolute Maximum Ratings at Ta = 25°C?

The operating temperature is 110 °C.

What is the output count of the MOC3081S?

The output count is 1.

What is the output current of the MOC3081S?

The output current is 100 mA.

What is the maximum power dissipation of the MOC3081S at Ta = 25°C?

The maximum power dissipation is 150 mW at Ta = 25°C.

What is the reverse voltage at Ta = 25°C?

The reverse voltage is 6 V at Ta = 25°C.

01 — Key specifications

MOC3081S-TA1 datasheet parameters

ParameterMinTypMaxConditionsSource
output current (abs max) — — 100 mA Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward voltage — 1.2 V 1.4 V IF = 20mA; 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta = 25℃ Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
operating temperature (abs max) -40 °C — 110 °C 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
power dissipation (abs max) — — 150 mW collector; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
reverse voltage (abs max) — — 6 V 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward current (abs max) — — 50 mA 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
drain current (abs max) — — 100 mA (rms); 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
isolation voltage (abs max) — — 5 kV isolation; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
dark current — 500 nA — Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
output count — 1 — Lite-On datasheet, p. 2
channel count — 1 — Lite-On datasheet, p. 2
02 — FAQ

MOC3081S-TA1 frequently asked questions

What is the channel count of the MOC3081S-TA1?

The channel count is 1.

What is the maximum dark current?

The dark current is 500 nA.

What is the maximum drain current at Ta = 25°C?

The maximum drain current is 100 mA (rms) at Ta = 25°C.

What is the forward current of the MOC3081S-TA1 at Ta = 25°C?

The forward current is 50 mA.

What is the forward voltage of the MOC3081S-TA1 at Ta = 25℃ when IF = 20mA?

The forward voltage is 1.2 V.

What is the isolation voltage of the MOC3081S-TA1?

The isolation voltage is 5 kV at Ta = 25°C.

What is the operating temperature specified in section 4.1 Absolute Maximum Ratings at Ta = 25°C?

The operating temperature is 110 °C.

What is the output count of the MOC3081S-TA1?

The output count is 1.

What is the output current of the MOC3081S-TA1?

The output current is 100 mA.

What is the maximum power dissipation at the collector when Ta = 25°C?

The power dissipation is 150 mW.

What is the reverse voltage at Ta = 25°C?

The reverse voltage is 6 V at Ta = 25°C.

01 — Key specifications

MOC3082 datasheet parameters

ParameterMinTypMaxConditionsSource
output current (abs max) — — 100 mA Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward voltage — 1.2 V 1.4 V IF = 20mA; 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta = 25℃ Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
operating temperature (abs max) -40 °C — 110 °C 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
power dissipation (abs max) — — 150 mW collector; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
reverse voltage (abs max) — — 6 V 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
forward current (abs max) — — 50 mA 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
drain current (abs max) — — 100 mA (rms); 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
isolation voltage (abs max) — — 5 kV isolation; 4.1 Absolute Maximum Ratings at Ta = 25°C Lite-On datasheet, p. 5 — 4.1 Absolute Maximum Ratings at Ta=25°C
dark current — 500 nA — Lite-On datasheet, p. 6 — 4.2 ELECTRICAL OPTICAL CHARACTERISTICS at Ta=25℃
output count — 1 — Lite-On datasheet, p. 2
channel count — 1 — Lite-On datasheet, p. 2
02 — FAQ

MOC3082 frequently asked questions

What is the channel count of the MOC3082?

The channel count is 1.

What is the dark current of the MOC3082?

The dark current is 500 nA.

What is the absolute maximum RMS drain current for the MOC3082 at Ta = 25°C?

The absolute maximum RMS drain current is 100 mA at Ta = 25°C.

What is the absolute maximum forward current rating for the MOC3082 at Ta = 25°C?

The absolute maximum forward current is 50 mA at Ta = 25°C.

What is the forward voltage of the MOC3082 at IF = 20mA and Ta = 25℃?

The forward voltage is 1.2 V.

What is the isolation voltage of the MOC3082 at Ta = 25°C?

The isolation voltage is 5 kV.

What is the operating temperature?

The operating temperature is 110 °C at 4.1 Absolute Maximum Ratings at Ta = 25°C.

What is the output count of the MOC3082?

The output count is 1.

What is the output current of the MOC3082?

The output current is 100 mA.

What is the maximum power dissipation at the collector?

The power dissipation at the collector is 150 mW at Ta = 25°C.

What is the reverse voltage at 4.1 Absolute Maximum Ratings at Ta = 25°C?

The reverse voltage is 6 V at 4.1 Absolute Maximum Ratings at Ta = 25°C.

03 — Alternatives

Closest matches to MOC308

HT-3021 similar dark current, similar forward current, similar forward voltage
PC817 3.3× lower dark current, 2.0× lower output current, 1.3× higher power dissipation
TLP785 2.0× lower output current, 1.7× lower power dissipation, 1.3× lower operating temperature
MOC3010M 2.2× higher power dissipation, 2.0× lower reverse voltage, 1.6× lower operating temperature
TLP185 20.0× higher forward current, 2.0× lower output current, 1.3× lower isolation voltage
TLP185GB 20.0× higher forward current, 2.0× lower output current, 1.3× lower isolation voltage
LTV-354T 5.0× lower dark current, 2.0× lower output current, 1.3× lower isolation voltage
LTV-217 20.0× higher forward current, 6.2× lower output current, 5.0× lower dark current
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