Is there a pin-compatible replacement for FTR07D330K?

While candidates like FTR10D390K have the same 2-pin radial lead format, they are not drop-in replacements. Differences in clamping voltage and physical size require engineering review.

What risks should I check before replacing FTR07D330K?

The main risk is a higher clamping voltage, which could expose your circuit to damaging voltage spikes. Also, check the physical dimensions, as alternatives may be larger (e.g., 10mm vs 7mm diameter).

FTR07D330K Alternatives, Datasheet & Cross Reference | FTR Qiaoguang

FTR07D330K is a 7mm, 33V radial disk varistor for overvoltage protection. Key alternatives exist but require careful review of clamping voltage and physical size before substitution.

AI replacement insight

Electrical riskmedium

Higher clamping voltage on alternatives may not adequately protect downstream components.

Package risklow

Alternatives have a larger 10mm diameter which requires checking physical board space.

Can it be replaced directly?

No direct drop-in replacement was found. FTR10D390K is the closest functional alternative but requires engineering review.

Best replacement path

FTR10D390K offers upgraded energy handling but requires verifying circuit tolerance for its higher clamping voltage.

Main risk

Increased clamping voltage, which reduces the level of overvoltage protection provided to the circuit.

Recommended alternatives

Functional alternative with higher energy rating but slightly increased clamping voltage. Review required.

View details

Alternative comparison matrix

Feature / factor	FTR07D330K	FTR10D390K	FTR10D470K	Compatibility / risk
Voltage	65V	77V	93V	77V / 93V — Higher clamping voltage reduces protection level.; FTR10D470K: Significantly higher clamping voltage reduces protection.
Current	250A / 1.7J	500A / 4.6J	500A / 5.5J	500A / 4.6J / 500A / 5.5J — Higher surge current and energy handling.; FTR10D470K: Higher surge current and energy handling.
Package	7mm	10mm	10mm	10mm — Larger element diameter, check physical clearance.; FTR10D470K: Larger element diameter, check physical clearance.

Application & sourcing insights

Questions & answers

FTR10D390K is a strong functional alternative with higher energy ratings, but has a slightly higher clamping voltage (77V vs 65V) and larger 10mm diameter that must be reviewed.