Parts · Diodes

1N4738A

Si Zener 8.2 V 1 W DO-41 TH.2 circuits use this part.

Datasheet · from vishay.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
1N4738	8.2 V	1.3 W	DO-41	3

1.3 W zener in DO-41, ±5 % tolerance.

Alternatives

Part	Vz	Power	Package	Boards	Differs
1N5237A	8.2 V	0.5 W	DO-35	2	DO-35 body; 0.5 W. 500 mW zener in DO-35; B suffix is ±5 %, C is ±2 %.
RD8.2EB	8.2 V	0.5 W	DO-35	1	DO-35 body; 0.5 W. 500 mW zener; the B1-B4 suffix only picks a narrower slice of the voltage spread.

Faceplate	Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
	Amnesia 1458 · 2N7000 · BC560B · PT2399 Smallsound/Bigsound No Memory · 1590BBS	Smallsound/Bigsound No Memory	Vibrato / Chorus	Dead End FX	1590BBS	6	$15.00 out	86
	Smallsound / Bigsound No Memory Delay Vero28×28 Verified 1458 · 2N7000 · 7805 · BC560B Smallsound/Bigsound No Memory	Smallsound/Bigsound No Memory	Delay	Dirtbox Layouts	—	10	—	54