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IW3 — Candidate to replace following?

Rectifier — B4

Equivalents — Same Tube, Different Names

✓ IW4✓ DW15

Top 10 Picks

V41drop-in

4V✓ Close

MU12drop-in

4V⚠ Close, low Pa

Your Tube

Base: B4

Heater: 4V / 1A

Type: rectifier

Pinout (B4)

a1hha2

Candidates to replace (2)

Fit:

Status:1 shown

4V Heater(1 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	V41	✓ Close	—	0.5	drop-in

Generated 2026-04-09Status legend →User Guide →

target +0 selectedpick 1+ to compareselect 1+ candidate to compare