The VOD3120AD-V is a single-channel optocoupler gate driver from Vishay, built with optical coupling technology to provide reinforced isolation between a low-voltage controller side and a high-voltage power stage. It delivers a 2.5 A peak output current, enough to directly drive medium-power IGBTs and SiC MOSFETs without an external buffer stage. The 5300 Vrms isolation rating qualifies it for motor drives, industrial inverters, UPS systems, and switch-mode power supplies where galvanic isolation is a safety requirement. The 35 kV/µs common-mode transient immunity (CMTI) keeps the gate signal clean in noisy inverter environments where fast switching edges couple across the isolation barrier.
The 5300 Vrms isolation voltage is the figure that determines creepage and clearance distances on the PCB — this part meets reinforced isolation requirements for mains-connected equipment. The 2.5 A peak output is the current available to charge and discharge the gate capacitance of the power switch; for a typical IGBT module with 100 nC gate charge, this translates to roughly 40 ns rise and fall times at the gate. The 35 kV/µs CMTI is the slew rate the part can reject on the common-mode voltage between input and output — essential when the power stage switches at 10–20 kV/µs and you need the gate driver to ignore that edge rather than glitch the output. Propagation delay is 500 ns max, which is typical for an optocoupler-based driver and must be budgeted in dead-time calculations for half-bridge topologies. The 70 ns max pulse-width distortion means the on and off delays are well matched, so the output duty cycle stays close to the input duty cycle.
Package and temperature range
The VOD3120AD-V comes in an 8-DIP through-hole package, which is the standard 0.300-inch wide DIP footprint with 7.62 mm row spacing. Through-hole mounting suits designs where manual rework or high-vibration environments make surface-mount less desirable. The supply voltage range of 15 V to 30 V matches the typical gate drive rails for IGBTs and SiC MOSFETs; the 1.37 V forward voltage and 20 mA max forward current define the LED drive on the input side.
Lifecycle and sourcing
It is approved by CQC, cUL, UL, and VDE, which covers the major safety agency certifications for industrial power equipment sold in North America, Europe, and China.