Parts · Diodes

1N5231

Si Zener 5.1 V 500 mW DO-35 TH.2 circuits use this part. Listed as: Zener diode 1/2W, 5.1V; Zener diode, 5.1V.

Datasheet · from onsemi.com

Substitutes same voltage

Zeners of the same voltage. The figures are read off each part's datasheet (this one's from page 2), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.

This part

Part	Vz	Power	Package	Boards
1N5231B	5.1 V	0.5 W	DO-35	7

500 mW glass zener, ±5 % in the B grade.

Alternatives

Part	Vz	Power	Package	Boards	Differs
RD5.1EB2	5.1 V	0.5 W	DO-35	17	500 mW zener; the B1-B4 suffix only picks a narrower slice of the voltage spread.
1N4733	5.1 V	1.3 W	DO-41	10	DO-41 body. 1.3 W zener in DO-41, ±5 % tolerance.

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Chauffeur Overdrive 2N4401 · 2N4403 · 4558 · 7660S Shnobel Tone Daily Driver Overdrive · 1590BB	Shnobel Tone Daily Driver Overdrive	Fuzz	PedalPCB	1590BB	4	$12.00	89
	Courier Overdrive 2N4401 · 2N4403 · 4558 · 7660S Shnobel Tone Mid Driver Overdrive · 1590BB	Shnobel Tone Mid Driver Overdrive	Fuzz	PedalPCB	1590BB	4	$12.00	89