What is the VOD3120AG and what does it drive?
The VOD3120AG is a Vishay single-channel optoisolated gate driver designed to drive IGBTs and MOSFETs in power-conversion stages. Its 2.5A peak output current is enough to charge and discharge the gate capacitance of medium-power IGBT modules and discrete MOSFETs without an external buffer stage — one less part on the BOM. The optical coupling provides 5300Vrms isolation between the controller side and the power stage, which is the typical requirement for motor drives, UPS systems, and industrial inverters that need reinforced insulation per IEC 60747-5-5.
Key ratings that matter for your BOM
Common-mode transient immunity is rated at 35kV/µs minimum — this means the output stays quiet when the power-stage midpoint switches at tens of kilovolts per microsecond, a common failure point in half-bridge and H-bridge designs. Without that margin, the driver can false-fire and short the bus. Propagation delay is 500ns max with a pulse-width distortion of 70ns max. For switching frequencies up to about 50 kHz, that skew is manageable; above that, the timing budget gets tight and you may need a faster driver. The 35ns rise/fall times are typical at the rated load — fast enough to reduce switching losses in the power device without creating excessive ringing if the gate-loop inductance is controlled. Supply voltage range is 15V to 30V, covering the standard gate-drive rails for IGBTs (15V on, -5V to -10V off) and most MOSFET gate thresholds. The forward LED requires 1.37V typical at up to 20 mA, compatible with 3.3V and 5V logic outputs through a series resistor.
Active lifecycle and sourcing posture
It is ROHS3 compliant and holds approvals from CQC, cUL, UL, and VDE, which simplifies compliance for equipment destined for multiple regional markets. Packaged in tubes in the 8-DIP through-hole format — the same 0.400-inch wide body as standard DIP-8 optocouplers, so the footprint is a drop-in for many existing layouts. Through-hole means you can hand-solder it on a bench or swap it in the field without a hot-air station. Submit an RFQ for the exact volume and delivery window you need.