BDW74C-S Equivalent & Substitute Parts Engineering Reference Guide

Part Overview

BDW74C-S is a PNP Darlington bipolar transistor manufactured by Bourns Inc., categorized under Transistors, Bipolar (BJT). The component is specified for 100 V collector-emitter breakdown voltage, 8 A maximum collector current, and is housed in a TO-220-3 through-hole package. With a product status of obsolete, alternative models are required for ongoing design, maintenance, and replacement needs when BDW74C-S is unavailable.

Key Parameters

Manufacturer Part Number	Transistor Type	Current - Collector (Ic) (Max)	Voltage - Collector Emitter Breakdown (Max)	Vce Saturation (Max) @ Ib, Ic	Current - Collector Cutoff (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Operating Temperature	Mounting Type	Package / Case	RoHS Status
BDW74C-S	PNP - Darlington	8 A	100 V	4V @ 80mA, 8A	500µA	750 @ 3A, 3V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitutes for BDW74C-S are selected strictly based on the following defined parameters within the Transistors, Bipolar (BJT) category:

Transistor Type: PNP - Darlington
Maximum Collector Current (Ic)
Maximum Collector-Emitter Breakdown Voltage (Vce)
Collector Cutoff Current
DC Current Gain (hFE)
Maximum Power Rating
Vce Saturation at specified test conditions
Package and Mounting Type: TO-220-3, Through Hole
Regulatory Compliance: RoHS status

All listed substitute parts match these critical electrical and mechanical parameters, ensuring functional and package compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Transistor Type	Current - Collector (Ic) (Max)	Voltage - Collector Emitter Breakdown (Max)	Vce Saturation (Max) @ Ib, Ic	Current - Collector Cutoff (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Operating Temperature	Mounting Type	Package / Case	RoHS Status	Product Status
BDW74C-S	Bourns Inc.	PNP - Darlington	8 A	100 V	4V @ 80mA, 8A	500µA	750 @ 3A, 3V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Obsolete
BDX54C	STMicroelectronics	PNP - Darlington	8 A	100 V	2V @ 12mA, 3A	500µA	750 @ 3A, 3V	60 W	150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP107	STMicroelectronics	PNP - Darlington	8 A	100 V	2.5V @ 80mA, 8A	50µA	1000 @ 3A, 4V	2 W	150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP107G	onsemi	PNP - Darlington	8 A	100 V	2.5V @ 80mA, 8A	50µA	1000 @ 3A, 4V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP127G	onsemi	PNP - Darlington	5 A	100 V	4V @ 20mA, 5A	500µA	1000 @ 3A, 3V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP137	STMicroelectronics	PNP - Darlington	8 A	100 V	4V @ 30mA, 6A	500µA	1000 @ 4A, 4V	2 W	150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active

Engineering Selection Recommendations

BDW74C-S is obsolete and identified as ROHS3 Compliant. All substitute components listed—BDX54C, TIP107, TIP107G, TIP127G, TIP137—are active status, ROHS3 Compliant, and in TO-220-3 through-hole packages. Selection is enabled by matching compliance, active availability, and compatibility with the provided mechanical and electrical specifications.

Frequently Asked Questions (FAQ)

Q1: What parameters are critical for substituting a PNP Darlington transistor in TO-220-3 package?
A1: Electrical compatibility requires matching transistor type, maximum collector current, maximum voltage rating, DC current gain, collector cutoff current, and package form factor.

Q2: Are these substitute parts compatible within the same mounting and footprint?
A2: All substitute parts utilize the TO-220-3 package and through-hole mounting, ensuring mechanical compatibility.

Q3: Is RoHS compliance maintained across all listed substitutes?
A3: All provided substitutes are ROHS3 Compliant.

Q4: Does product status affect substitute selection?
A4: BDW74C-S is obsolete; all suggested substitutes are active, supporting ongoing sourcing and reliability.

Q5: Can differences in Vce saturation and current gain affect substitution?
A5: Substitution follows matching thresholds as provided. Only parts meeting or exceeding the specified allowed values are included in this reference.

Q6: Is operating temperature range consistent across substitutes?
A6: All listed parts specify either -65°C ~ 150°C (TJ) or 150°C (TJ), conforming to the requirements of the main part.

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