BD544C-S Equivalent & Substitute Parts Reference

Part Overview

The BD544C-S is a PNP bipolar junction transistor (BJT) manufactured by Bourns Inc. in the Transistors, Bipolar (BJT) category. It offers a collector-emitter voltage of 100 V, collector current rating of 8 A, and is packaged in a TO-220 through-hole format. The BD544C-S is listed as obsolete, requiring consideration of equivalent or substitute models for ongoing and new designs. Identification of alternatives is necessary to maintain continuity in assembly, repair, and manufacturing processes where the original part is no longer available.

Key Parameters

Parameter	Value
Transistor Type	PNP
Collector-Emitter Breakdown Voltage (Max)	100 V
Collector Current (Ic) Max	8 A
Vce Saturation (Max) @ Ib, Ic	1V @ 1.6A, 8A
Collector Cutoff Current (Max)	700 µA
DC Current Gain (hFE) Min @ Ic, Vce	15 @ 5A, 4V
Power (Max)	2 W
Mounting Type	Through Hole
Package / Case	TO-220-3
Operating Temperature	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the BD544C-S are selected strictly based on matching or exceeding the following key parameters: transistor type (PNP), collector-emitter breakdown voltage (minimum 100 V), collector current rating (sufficient for application), power dissipation, mounting type (through-hole), and package type (TO-220-3 or equivalent). Additional criteria include compliance status and operating temperature range. All substitute parts are grouped due to equivalence in these conveyed parameters.

Parameter Comparison

Manufacturer Part Number	Transistor Type	Collector-Emitter Breakdown Voltage (Max)	Collector Current (Ic) Max	Vce Saturation (Max) @ Ib, Ic	Collector Cutoff Current (Max)	DC Current Gain (hFE) Min @ Ic, Vce	Power (Max)	Mounting Type	Package / Case	Operating Temperature	RoHS Status	Product Status
BD544C-S	PNP	100 V	8 A	1V @ 1.6A, 8A	700 µA	15 @ 5A, 4V	2 W	Through Hole	TO-220-3	-65°C ~ 150°C	ROHS3 Compliant	Obsolete
BD244CG	PNP	100 V	6 A	1.5V @ 1A, 6A	700 µA	15 @ 3A, 4V	65 W	Through Hole	TO-220-3	-65°C ~ 150°C	ROHS3 Compliant	Active
BD912	PNP	100 V	15 A	3V @ 2.5A, 10A	1mA	40 @ 500mA, 4V	90 W	Through Hole	TO-220-3	-65°C ~ 150°C	RoHS non-compliant	Active
MJE15029G	PNP	120 V	8 A	500mV @ 100mA, 1A	100 µA	20 @ 4A, 2V	50 W	Through Hole	TO-220-3	-65°C ~ 150°C	ROHS3 Compliant	Active
TIP30CG	PNP	100 V	1 A	700mV @ 125mA, 1A	300 µA	15 @ 1A, 4V	2 W	Through Hole	TO-220-3	-65°C ~ 150°C	ROHS3 Compliant	Active
TIP32C	PNP	100 V	3 A	1.2V @ 375mA, 3A	300 µA	10 @ 3A, 4V	2 W	Through Hole	TO-220-3	150°C	ROHS3 Compliant	Active
TIP32CG	PNP	100 V	3 A	1.2V @ 375mA, 3A	300 µA	10 @ 3A, 4V	2 W	Through Hole	TO-220-3	-65°C ~ 150°C	ROHS3 Compliant	Active
TIP42C-BP	PNP	100 V	6 A	1.5V @ 600mA, 6A	700 µA	15 @ 3A, 4V	2 W	Through Hole	TO-220-3	150°C	ROHS3 Compliant	Active
TIP42CG	PNP	100 V	6 A	1.5V @ 600mA, 6A	700 µA	15 @ 3A, 4V	2 W	Through Hole	TO-220-3	-65°C ~ 150°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

The BD544C-S is obsolete, necessitating selection of replacement parts with matching parameters. For continued use in regulated environments, RoHS compliance is commonly required; alternatives with "ROHS3 Compliant" status address this criterion. Product status should be verified as "Active" when ongoing supply is needed; all substitutes except BD912 (RoHS non-compliant) fulfill both RoHS and active status requirements. Select the substitute that best matches the intended use and compliance requirements according to the above table.

Frequently Asked Questions (FAQ)

Q: What are the main electrical parameters required when selecting a substitute for BD544C-S?
A: Transistor type (PNP), collector-emitter breakdown voltage (minimum 100 V), collector current rating, DC current gain, and power dissipation.

Q: Is package compatibility important for direct substitution?
A: Yes. The mounting type should be through-hole, and the package must be TO-220-3 or equivalent to ensure mechanical fit.

Q: Should RoHS status be considered for replacement selection?
A: RoHS compliance should be confirmed when mandated by manufacturing or regulatory standards.

Q: What operating temperature range is needed for substitutes?
A: All substitutes meet the stated -65°C to 150°C junction temperature range specified for BD544C-S.

Q: Are all substitute parts currently available?
A: All listed substitutes are in active product status and are in stock, except for the main part which is obsolete.

Q: Can parts with higher current or voltage ratings be used as substitutes?
A: Yes, substitutes with higher ratings for voltage or current may be used if other parameters and package are compatible based on the provided table.

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