Feature(s)

BVCEO > 300V
IC Max. 3.5A High Continuous Collector Current
ICM Max. 5A Peak Pulse Current
Very Low Saturation Voltage VCE(sat) < 155mV @ 1A
RCE(sat) = 87mΩ for a Low Equivalent On-Resistance
hFE Specified Up to 3A for a High Gain Hold-Up
Complementary PNP Type: FZT957Q
Lead-Free Finish; RoHS Compliant
Halogen and Antimony Free. “Green” Device
The FZT857Q is suitable for automotive applications
requiring specific change control; this part is AEC-Q101
qualified, PPAP capable, and manufactured in IATF16949
certified facilities.
https://www.diodes.com/quality/product-definitions/

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Automotive
Category	High Voltage Transistor
Polarity	NPN
VCEO, VCES (V)	300
IC (A)	3.5
ICM (A)	5
PD (W)	3
hFE (Min)	100
hFE (@ IC) (A)	0.01
h_FE(Min 2)	15
hFE (@ IC2) (A)	2
VCE(sat) Max (mV)	100
V_CE(SAT) (@ IC/IB) (A/mA)	0.5/100
VCE(sat) (Max.2) (mV)	230
VCE(sat) (@ IC/IB2) (A/mA)	2/200
fT (MHz)	80

Technical Documents

SPICE Model

FZT857Q.spice.txt

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

Purchase & Availability

Something went wrong with your request. Please try again later. If this problem continues, please contact Diodes support for assistance.

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2738	2025-07-11	2025-10-10	Qualification of New Deflashing and Tin Plating Line

FZT857Q