Parts · Transistors

MMBF5457

8 circuits use this part. Listed as: JFET, N-channel, SOT-23; JFET, N-channel, TO-92.

Substitutes N-channel JFET

Matched on material, polarity and the limits below from the transistor parameter database. Pinouts and packages are not in that data: check the datasheet before you drop one in, and expect gain to change the sound.

This part

Part	Vgs max	Id max	Vds	Pd
MMBF5457	6 V	5 mA	25 V	0.35 W

Used on other boards here

Part	Vgs max	Id max	Vds	Pd	Boards
PN4393		5 mA	40 V	0.36 W	1
J202	4 V	4.5 mA	40 V	0.625 W	2
2N5458	3.5 V	9 mA	25 V	0.625 W	21
2SK246		14 mA	50 V	0.3 W	2
2N5952	3 V	8 mA	30 V	0.36 W	14
2N5484	25 V	5 mA	25 V	0.35 W	7
2N5459	4.5 V	16 mA	25 V	0.625 W	2
2SK170		20 mA	40 V	0.2 W	2

Closest by the numbers

Part	Vgs max	Id max	Vds	Pd
BFR31		5 mA	25 V	0.225 W
2SK2091		5 mA	30 V	0.15 W
BF861A		6.5 mA	25 V	0.25 W
PN4302	4 V	5 mA	30 V	0.625 W
2N5452	4.5 V	5 mA	50 V	0.5 W
2N5453	4.5 V	5 mA	50 V	0.5 W
2N5454	4.5 V	5 mA	50 V	0.5 W
2N5670		8 mA	25 V	0.31 W

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Artemis Mk. I Preamp Drive MMBF5457	Catalinbread SFT V1	Overdrive	Aion FX	125B	3	$12.50	59
Asteria Mk. I Preamp Drive MMBF5457	Catalinbread Formula No. 5 (V1)	Overdrive	Aion FX	125B	4	$12.50	44
Asteria Mk. II Preamp Drive MMBF5457	Catalinbread Formula No. 5 (V2)	Overdrive	Aion FX	125B	3	$12.50	47
Gaia Mk. I Preamp Drive MMBF5457	Catalinbread CB30	Overdrive	Aion FX	125B	3	$12.50	76
Triton Mk. II Preamp Drive MMBF5457	Dirty Little Secret Mk. II	Overdrive	Aion FX	125B	4	$12.50	58
Mesmerizer 2N5457 · 2N5485 · MMBF5457 · MMBF5485	Catalinbread Pareidolia	Vibrato / Chorus	PedalPCB	125B	3	$12.00	67
CVE Drive L78L06 · MMBF5457 · RC4558	Dirty	Overdrive	Sheepylove	—	6	€10.00	55
Epic Boost 2SC1815 · MMBF5457	EP boost	Boost	Sheepylove	—	2	€5.00	26