BD242C-S Equivalent & Substitute Parts Reference

Part Overview

The BD242C-S by Bourns Inc. is a PNP bipolar junction transistor from the "Transistors, Bipolar (BJT)" category, designed for through-hole mounting in TO-220 packages. Its key functional specifications include a collector-emitter breakdown voltage of 100 V, collector current rating of 3 A, and a maximum power dissipation of 2 W. The BD242C-S is currently classified as "Obsolete." It is often necessary to identify alternative part numbers for continued design, manufacturing, and repair applications where this product is specified and unavailable due to its status.

Key Parameters

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	Supplier Device Package	RoHS Status
BD242C-S	Bourns Inc.	PNP	3 A	100 V	1.2V @ 600mA, 3A	300µA	10 @ 3A, 4V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute and equivalent parts for BD242C-S are identified strictly using the following parameters: transistor type (PNP), collector current (Ic), collector-emitter breakdown voltage (Vce), saturation voltage (Vce Sat.), cutoff current, DC current gain (hFE), power dissipation, mounting type, and package outline. Only parts that match or exceed these parameters and share the same package style and compliance status are included. All substitute relationships are defined by direct equivalence or by close matching in these defined characteristics.

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	Supplier Device Package	RoHS Status
BD242C-S	Bourns Inc.	PNP	3 A	100 V	1.2V @ 600mA, 3A	300µA	10 @ 3A, 4V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant
BD242CG	onsemi	PNP	3 A	100 V	1.2V @ 600mA, 3A	300µA	25 @ 1A, 4V	40 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant
TIP32C	STMicroelectronics	PNP	3 A	100 V	1.2V @ 375mA, 3A	300µA	10 @ 3A, 4V	2 W	150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant
TIP32C-BP	Micro Commercial Co	PNP	3 A	100 V	1.2V @ 375mA, 3A	300µA	10 @ 3A, 4V	2 W	150°C (TJ)	Through Hole	TO-220-3	TO-220AB	ROHS3 Compliant
TIP32CG	onsemi	PNP	3 A	100 V	1.2V @ 375mA, 3A	300µA	10 @ 3A, 4V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant
BD912	NTE Electronics, Inc	PNP	15 A	100 V	3V @ 2.5A, 10A	1mA	40 @ 500mA, 4V	90 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	RoHS non-compliant
MJE15029G	onsemi	PNP	8 A	120 V	500mV @ 100mA, 1A	100µA	20 @ 4A, 2V	50 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant
TIP30CG	onsemi	PNP	1 A	100 V	700mV @ 125mA, 1A	300µA	15 @ 1A, 4V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant
TIP42CG	onsemi	PNP	6 A	100 V	1.5V @ 600mA, 6A	700µA	15 @ 3A, 4V	2 W	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	TO-220	ROHS3 Compliant

Engineering Selection Recommendations

The BD242C-S is designated as Obsolete, with ROHS3 compliance. For new designs or replacements, select substitute parts that match the compliance status and certifications. Priority should be given to active parts with ROHS3 compliance, matching package type, and equivalent or higher electrical ratings. Only substitute components that fully meet these criteria should be considered for engineering continuity.

Frequently Asked Questions (FAQ)

Q1: What electrical parameters must match for direct substitution of BD242C-S in circuit design?
A1: For direct substitution, ensure equivalent transistor type (PNP), collector current (Ic) rating, voltage rating (Vce), Vce saturation, cutoff current, DC current gain (hFE), and power dissipation as specified.

Q2: Can substitute parts with different package designations be used?
A2: Substitutes listed are all through-hole TO-220 or TO-220AB packages, which maintain compatibility in physical mounting and thermal characteristics for most designs.

Q3: Is RoHS compliance required for substitution?
A3: Matching the RoHS compliance status of the main part is recommended for regulatory and environmental alignment. The original BD242C-S is ROHS3 compliant; suitable substitutes should be similarly compliant.

Q4: Does the operating temperature range affect substitution?
A4: All listed substitutes include an operating junction temperature up to 150°C, equivalent with the original BD242C-S.

Q5: Are higher rated parts appropriate substitutes?
A5: Parts with higher collector current, voltage, or power rating that meet or exceed the BD242C-S's specifications and compliance can be considered direct equivalents within those application limits.

Q6: How does product status influence selection?
A6: Active status parts are preferred for ongoing availability. The substitute list includes frequently stocked, active-status transistors for reliability of supply.

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