Parts · Diodes

1N4448

Si Signal Diode DO-35 TH.5 circuits use this part.

Datasheet · from vishay.com

Substitutes same kind

Diodes of the same kind; for clipping, the forward drop is what you hear. 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	Vf	If max	Vr	trr	Cj	Package	Boards
1N4448	0.72 V @ 5 mA	0.15 A	100 V	4 ns	4 pF	DO-35	5

A 1N4148 with a tighter forward voltage spec (0.62-0.72 V at 5 mA).

Alternatives

Part	Vf	If max	Vr	trr	Cj	Package	Boards	Differs
1N914BWS	0.72 V @ 5 mA	0.15 A	75 V	4 ns	4 pF	SOD-323	2	SOD-323. Surface-mount 1N914B in the small SOD-323 package.
1N457A	1 V @ 20 mA	0.2 A	70 V		8 pF	DO-35	1	Low-leakage 70 V glass diode (25 nA at 60 V).
1N4148W	0.715 V @ 1 mA	0.3 A	100 V	4 ns	2 pF	SOD-123	5	SOD-123. Surface-mount 1N4148 in SOD-123.
1S1588	1.3 V @ 100 mA	0.12 A	35 V	4 ns	3 pF	DO-35	56	A 1N4148-class switching diode; Vf is only a 1.3 V maximum at 100 mA.
1N458A	1 V @ 100 mA	0.5 A	150 V			DO-35	2	Low-leakage 150 V glass diode (25 nA at 125 V).
OA200	0.53 V @ 0.1 mA	0.05 A	50 V				3	An early silicon-alloy diode with a 0.53 V drop at 0.1 mA, close to a 1N4148.
MA856	1 V @ 100 mA	0.1 A	35 V		2 pF	DO-34	18	DO-34. A band-switching diode (MA2C856), discontinued; Vf is only a 1 V maximum at 100 mA.
BA282	1 V @ 100 mA	0.1 A	35 V		1.5 pF	DO-35	8	A VHF band-switching diode; Vf is only a 1 V maximum at 100 mA.
1N456	1 V @ 100 mA	0.5 A	30 V			DO-35	8	Low-leakage 30 V glass diode (25 nA at 25 V) that clips much like a 1N4148.
BA482	1.2 V @ 100 mA	0.1 A	35 V		0.8 pF	DO-34	10	DO-34. A VHF band-switching diode; Vf is only a 1.2 V maximum at 100 mA.

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Mesa Boogie Flux Drive Vero21×22 Unverified 2N3904 · 4558 · JRC4558 Mesa Boogie Flux Drive	Mesa Boogie Flux Drive	Overdrive	Dirtbox Layouts	—	4	—	34
Mesa Boogie Throttle Box Vero32×24 Unverified 4558 · TL074 Mesa Boogie Throttle Box	Mesa Boogie Throttle Box	Distortion	Dirtbox Layouts	—	4	—	48
Elektor Distortion TL072 · TL081	—	Distortion	Experimentalists Anonymous	—	—	—	73
Rectifier Box 4558 · JRC4558 · TL074 Mesa Boogie Throttle Box · 1590BB	Mesa Boogie Throttle Box	Distortion	PCB Guitar Mania	1590BB	4	€10.90 out	81
Gauss Drive 2SC1815 · 4558 · JRC4558 Mesa Boogie Flux Drive · 125B	Mesa Boogie Flux Drive	Fuzz	PedalPCB	125B	4	$12.00	56