BD239D-S Equivalent & Substitute Parts Reference

Part Overview

The BD239D-S (Bourns Inc.) is a bipolar (BJT) NPN transistor featuring a 120 V collector-emitter breakdown voltage and a maximum collector current of 2 A in a TO-220 through-hole package. This component is classified as obsolete, necessitating identification of electrically and mechanically compatible substitute parts. Suitable alternatives must match or exceed the main transistor’s performance while adhering to the same package and mounting style specifications.

Key Parameters

Parameter	Value
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	120 V
Current - Collector (Ic) (Max)	2 A
Vce Saturation (Max) @ Ib, Ic	700mV @ 200mA, 1A
Current - Collector Cutoff (Max)	200µA
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 1A, 4V
Power - Max	2 W
Mounting Type	Through Hole
Package / Case	TO-220-3
Supplier Device Package	TO-220
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for BD239D-S are selected strictly based on matching the following key parameters:

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

Only parts meeting these explicit requirements and certification statuses are included in substitution consideration.

Parameter Comparison

Manufacturer Part Number	Voltage - Collector Emitter Breakdown (Max)	Current - Collector (Ic) (Max)	Vce Saturation (Max) @ Ib, Ic	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Transistor Type	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	Product Status
BD239D-S (Main)	120 V	2 A	700mV @ 200mA, 1A	15 @ 1A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Obsolete
BD239C	100 V	2 A	700mV @ 200mA, 1A	15 @ 1A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
BD241C	100 V	3 A	1.2V @ 600mA, 3A	10 @ 3A, 4V	40 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
BD243CG	100 V	6 A	1.5V @ 1A, 6A	15 @ 3A, 4V	65 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
BD911	100 V	15 A	3V @ 2.5A, 10A	40 @ 500mA, 4V	90 W	NPN	Through Hole	TO-220-3	TO-220	RoHS non-compliant	Active
MJE15028G	120 V	8 A	500mV @ 100mA, 1A	20 @ 4A, 2V	50 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
TIP29C	100 V	1 A	700mV @ 125mA, 1A	15 @ 1A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
TIP29CG	100 V	1 A	700mV @ 125mA, 1A	15 @ 1A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
TIP31C	100 V	3 A	1.2V @ 375mA, 3A	10 @ 3A, 4V	40 W	NPN	Through Hole	TO-220-3	TO-220	Vendor Undefined	Active
TIP31CG	100 V	3 A	1.2V @ 375mA, 3A	10 @ 3A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active
TIP41C	100 V	6 A	1.5V @ 600mA, 6A	15 @ 3A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220-3	ROHS3 Compliant	Active
TIP41CG	100 V	6 A	1.5V @ 600mA, 6A	15 @ 3A, 4V	2 W	NPN	Through Hole	TO-220-3	TO-220	ROHS3 Compliant	Active

Engineering Selection Recommendations

For replacement of the BD239D-S, selection should prioritize substitute parts with ROHS3 Compliant status and active product listing. Non-compliant or obsolete alternatives may not meet requirements for regulatory or sustainability standards. Only those alternatives with certified compliance and matching or greater electrical and mechanical parameters should be considered.

Frequently Asked Questions (FAQ)

Q: What are the primary compatibility considerations for substituting BD239D-S?
A: Compatible substitutes must match the transistor type (NPN), package (TO-220-3), mounting type (Through Hole), collector voltage and current ratings, minimum DC current gain, and compliance status.

Q: Can substitute parts have higher current or power ratings?
A: Substitute parts can possess equal or higher ratings for collector current and power dissipation, provided all other key physical and electrical parameters are maintained.

Q: Is RoHS compliance mandatory when selecting substitutes?
A: For designs subject to environmental compliance standards, RoHS3 Compliant status is mandatory. Non-compliant substitutes must only be used in applications where such certification is not required.

Q: Are there package differences between supplier device package and actual mounting case?
A: Substitute parts must use the same through-hole TO-220-3 case and supplier device package type to ensure mechanical compatibility for board mounting and thermal management.

Q: Should obsolete status affect selection?
A: Preference must be given to active status components with verified inventory to avoid future sourcing risks. Obsolete substitutes should only be used if active alternatives are unavailable and inventory is confirmed.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message