Equivalent & Substitute Parts for BUJD103AD,118

Part Overview

The BUJD103AD,118 is an NPN bipolar junction transistor (BJT) manufactured by WeEn Semiconductors. It is specified for a collector-emitter voltage up to 400 V, a collector current up to 4 A, power dissipation up to 80 W, and is packaged in a surface-mount DPAK (TO-252-3, 2 Leads + Tab, SC-63). The part is active and available in tape & reel packaging.

Identifying suitable alternative models is necessary to support supply chain resilience, mitigate stock shortages, and maintain compatibility in automated high-volume assembly processes, given DPAK surface-mount requirements.

Key Parameters

Parameter	BUJD103AD,118
Category	Transistors, Bipolar (BJT)
Transistor Type	NPN
Current - Collector (Ic) (Max)	4 A
Voltage - Collector Emitter Breakdown (Max)	400 V
Vce Saturation (Max) @ Ib, Ic	1V @ 1A, 4A
Current - Collector Cutoff (Max)	100µA
DC Current Gain (hFE) (Min) @ Ic, Vce	11 @ 2A, 5V
Power - Max	80 W
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Supplier Device Package	DPAK
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the BUJD103AD,118 is evaluated strictly by the following parameters:

Transistor category: Bipolar (BJT)
Transistor type: NPN
Maximum collector-emitter voltage (Vce): 400 V
Maximum collector current (Ic): equal to or exceeding 1 A
Similar saturation voltage and DC current gain
Power dissipation specified
Surface-mount configuration (TO-252-3, DPAK or equivalent)
RoHS compliance
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Operating temperature: up to 150°C (TJ)

Only parts fully matching the above parameters are included as substitutes.

Parameter Comparison

Parameter	BUJD103AD,118	FJD3305H1TM	FJD5555TM	MJD50G
Manufacturer	WeEn Semiconductors	onsemi	onsemi	onsemi
Transistor Type	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	4 A	4 A	5 A	1 A
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	400 V	400 V
Vce Saturation (Max) @ Ib, Ic	1V @ 1A, 4A	1V @ 1A, 4A	1.5V @ 1A, 3.5A	1V @ 200mA, 1A
Current - Collector Cutoff (Max)	100µA	1µA (ICBO)	-	200µA
DC Current Gain (hFE) (Min) @ Ic, Vce	11 @ 2A, 5V	8 @ 2A, 5V	20 @ 800mA, 3V	30 @ 300mA, 10V
Power - Max	80 W	1.1 W	1.34 W	1.56 W
Operating Temperature	150°C (TJ)	150°C (TJ)	150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63
Supplier Device Package	DPAK	TO-252AA	TO-252AA	DPAK
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts are RoHS-compliant and maintain a Moisture Sensitivity Level (MSL) of 1 (Unlimited). Product status and inventory levels are provided for selection based on availability and compliance requirements only.

Frequently Asked Questions (FAQ)

Q1: Which key parameters determine if a substitute NPN BJT is compatible with BUJD103AD,118?
A1: Parameters include transistor type, maximum collector-emitter voltage, maximum collector current, saturation voltage, DC current gain, power rating, mounting type, package, RoHS status, and Moisture Sensitivity Level.

Q2: Are there differences in DPAK package designations?
A2: Yes. Designations such as TO-252-3, DPAK, SC-63, and TO-252AA reference surface-mount packages with closely similar lead and tab configurations. Parts in this list explicitly match these criteria.

Q3: Do these substitute BJTs ensure the same operational temperature range?
A3: All substitute transistors listed specify a maximum junction temperature of 150°C (TJ), matching the original.

Q4: Is pinout identical for these DPAK alternatives?
A4: All listed parts utilize the DPAK (TO-252-3) format, which is standardized for pinout in the BJT category according to the supplied information.

Q5: What compliance information is provided?
A5: All parts have RoHS status listed and MSL of 1 (Unlimited), meeting requirements for environmental compliance and handling in manufacturing environments.

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