BD244B-S Equivalent & Substitute Parts Engineering Reference

Part Overview

The BD244B-S is a PNP bipolar junction transistor (BJT) manufactured by Bourns Inc., categorized under Transistors, Bipolar (BJT). It features a maximum collector current of 6 A and a maximum collector-emitter breakdown voltage of 80 V, housed in a TO-220 through-hole package. The BD244B-S is currently obsolete, necessitating consideration of alternative models for ongoing manufacturing, maintenance, and procurement where identical electrical and mechanical parameters are required.

Key Parameters

Parameter	BD244B-S Value	Parameter Description
Transistor Type	PNP	BJT polarity
Current - Collector (Ic) (Max)	6 A	Maximum continuous collector current
Voltage - Collector Emitter Breakdown (Max)	80 V	Maximum allowable Vce
Vce Saturation (Max) @ Ib, Ic	1.5V @ 1A, 6A	Saturation voltage at specified Ib/Ic
Current - Collector Cutoff (Max)	700µA	Maximum cutoff current
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V	Minimum hFE at specified Ic and Vce
Power - Max	2 W	Maximum power dissipation
Operating Temperature	-65°C ~ 150°C (TJ)	Junction temperature range
Mounting Type	Through Hole	Mechanical mounting method
Package / Case	TO-220-3	Industry standard package outline
Supplier Device Package	TO-220	Package as supplied by manufacturer
RoHS Status	ROHS3 Compliant	Environmental compliance
Product Status	Obsolete	Lifecycle status

Substitute Part Grouping Explanation

Substitute parts are selected strictly according to matching key parameters relevant for the Transistors, Bipolar (BJT) category. These are:

Transistor Type (PNP)
Current - Collector (Ic) (Max)
Voltage - Collector Emitter Breakdown (Max)
Power - Max
DC Current Gain (hFE) (Min)
Vce Saturation (Max) @ Ib, Ic
Operating Temperature
Package / Case (TO-220-3)
Mounting Type (Through Hole)
RoHS Status

Only those alternate models conforming to all provided electrical, thermal, mechanical, and compliance constraints are included as substitutes.

Parameter Comparison

Part Number	Transistor Type	Ic (Max)	V_CE (Breakdown Max)	V_CE Saturation (Max) @ Ib, Ic	Current - Collector Cutoff (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	Product Status
BD244B-S	PNP	6 A	80 V	1.5V @ 1A, 6A	700µA	15 @ 3A, 4V	2 W	-65°C ~ 150°C	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Obsolete
2N6491G	PNP	15 A	80 V	3.5V @ 5A, 15A	1mA	20 @ 5A, 4V	1.8 W	-65°C ~ 150°C	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
D45H11	PNP	10 A	80 V	1V @ 400mA, 8A	10µA	40 @ 4A, 1V	50 W	150°C	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
TIP42G	PNP	6 A	40 V	1.5V @ 600mA, 6A	700µA	15 @ 3A, 4V	2 W	-65°C ~ 150°C	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Last Time Buy

Engineering Selection Recommendations

All substitute models provided are ROHS3 compliant and available in TO-220-3 through-hole packages, matching key mechanical and environmental compliance requirements. The BD244B-S is obsolete, while substitute models such as 2N6491G and D45H11 have active product status, suitable for ongoing component sourcing. TIP42G is listed as Last Time Buy. Selection between substitutes should reference manufacturer availability and lifecycle status in addition to mechanical and compliance matching.

Frequently Asked Questions (FAQ)

Q: What are the main criteria when selecting a substitute for the BD244B-S?
A: Substitute selection is based strictly on matching transistor type (PNP), collector current rating, collector-emitter breakdown voltage, saturation voltage, DC current gain, package type (TO-220-3), mounting method (through hole), operating temperature, and ROHS compliance.

Q: Is TO-220-3 package compatibility mandatory when substituting BD244B-S?
A: Yes, only substitute parts with the TO-220-3 package and through-hole mounting type, as specified in the parameters, are considered mechanically compatible.

Q: Can the TIP42G be substituted directly for BD244B-S?
A: TIP42G matches most electrical and mechanical parameters but has a lower collector-emitter breakdown voltage (40 V vs 80 V) and is currently Last Time Buy status.

Q: Do all substitutes conform to ROHS environmental standards?
A: Yes, all listed substitute transistors (2N6491G, D45H11, TIP42G) are ROHS3 compliant as specified.

Q: Does product status affect substitute selection?
A: Product status is considered; parts with "Active" status such as 2N6491G and D45H11 are preferred for long-term sourcing, while "Last Time Buy" and "Obsolete" status indicate restricted future availability.

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