MJD32C Equivalent & Substitute Parts

Part Overview

The MJD32C is a PNP bipolar junction transistor manufactured by STMicroelectronics, rated for 100 V collector-emitter breakdown voltage and 3 A maximum collector current in a surface mount DPAK package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The MJD32C remains available in inventory (152,440 pieces), but active alternatives provide extended product lifecycle support and manufacturing continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	3	A
Collector-Emitter Breakdown Voltage (Max)	100	V
Vce Saturation (Max)	1.2	V @ 375mA, 3A
Power Dissipation (Max)	15	W
DC Current Gain (hFE Min)	10	@ 3A, 4V
Operating Temperature (Max)	150	°C
Package Type	TO-252-3 DPAK	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MJD32C is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Transistor polarity: PNP
Collector current rating: 3 A minimum
Collector-emitter breakdown voltage: 100 V minimum
Vce saturation: 1.2 V @ 375mA, 3A
DC current gain (hFE): 10 minimum @ 3A, 4V
Package: TO-252-3 DPAK surface mount
RoHS3 compliance

Direct Equivalents maintain all electrical and mechanical parameters within the specified tolerances and are available from multiple manufacturers (STMicroelectronics, Diodes Incorporated, Micro Commercial Co, onsemi).

Similar Alternatives satisfy the core electrical requirements (PNP, 100 V, 3 A capability) but may differ in secondary parameters such as power dissipation rating, frequency response, or packaging variant. These parts are suitable for applications where the primary electrical specifications are the controlling factors.

Lower Voltage Alternatives (such as MJD32RLG at 40 V) are listed for reference but are not suitable for direct substitution in circuits requiring 100 V rating.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) A	Vce(br) V	Vce Sat V	Power W	hFE Min	Freq MHz	Temp °C	Package	Status
MJD32C	STMicroelectronics	3	100	1.2	15	10	—	150	DPAK	Obsolete
MJD32CT4-A	STMicroelectronics	3	100	1.2	15	10	—	150	DPAK	Active
MJD32C-13	Diodes Incorporated	3	100	1.2	15	10	3	-55 to 150	TO-252-3	Active
MJD32C-TP	Micro Commercial Co	3	100	1.2	1.25	10	3	150	DPAK	Active
MJD32CG	onsemi	3	100	1.2	1.56	10	3	-65 to 150	DPAK	Active
MJD32CQ-13	Diodes Incorporated	3	100	1.2	15	10	3	-55 to 150	TO-252-3	Active
NJVMJD32CG	onsemi	3	100	1.2	1.56	10	3	-65 to 150	DPAK	Active
2SA1593S-TL-E	onsemi	2	100	0.6	1	140	120	150	TP-FA	Active
2SB1215S-TL-E	onsemi	3	100	0.5	1	140	130	150	TP-FA	Active
MJD32RLG	onsemi	3	40	1.2	1.56	10	3	-65 to 150	DPAK	Active

Engineering Selection Recommendations

Direct Replacement (Recommended for Obsolescence Mitigation):

MJD32CT4-A, MJD32C-13, MJD32CQ-13, and NJVMJD32CG are direct electrical equivalents to the MJD32C. All maintain the 3 A collector current, 100 V breakdown voltage, and 1.2 V saturation voltage specifications. MJD32CT4-A is manufactured by the original supplier (STMicroelectronics) and is the primary recommended replacement. MJD32C-13 and MJD32CQ-13 (Diodes Incorporated) and NJVMJD32CG (onsemi) provide multi-source alternatives with active product status and extended temperature operating ranges (-55°C to 150°C or -65°C to 150°C).

Secondary Alternatives (Application-Dependent):

MJD32C-TP and MJD32CG are electrically equivalent but specify lower power dissipation ratings (1.25 W and 1.56 W respectively, compared to 15 W for the original). These parts are suitable for applications where the actual power dissipation does not exceed their rated values. Both are active products with RoHS3 compliance.

Similar Performance Alternatives (Functional Substitution):

2SB1215S-TL-E maintains the 3 A collector current and 100 V breakdown voltage but operates at higher frequency (130 MHz) and lower saturation voltage (0.5 V). This part is suitable for high-frequency switching applications where the enhanced performance characteristics provide design benefits. 2SA1593S-TL-E is rated for 2 A maximum collector current and is not suitable for applications requiring the full 3 A capability.

Not Recommended for Direct Substitution:

MJD32RLG is rated for 40 V collector-emitter breakdown voltage and is unsuitable for circuits designed for 100 V operation.

Frequently Asked Questions (FAQ)

Q: Can MJD32CT4-A be used as a direct replacement for MJD32C?

A: Yes. MJD32CT4-A is manufactured by STMicroelectronics and maintains identical electrical specifications: 3 A collector current, 100 V breakdown voltage, 1.2 V saturation voltage, and 15 W power dissipation. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and active product status. Electrical performance and pinout are equivalent.

Q: What is the difference between MJD32C-13 and MJD32CQ-13?

A: Both are manufactured by Diodes Incorporated and are electrically equivalent to the MJD32C. The primary difference is the device designation suffix (-13 versus -Q-13), which reflects internal manufacturing or quality grade variations. Both maintain 3 A collector current, 100 V breakdown voltage, and 15 W power dissipation. Both are active products with extended operating temperature ranges.

Q: Are MJD32CG and NJVMJD32CG interchangeable?

A: Yes. Both are manufactured by onsemi, maintain identical electrical specifications (3 A, 100 V, 1.2 V saturation), and use the same DPAK package. NJVMJD32CG is a variant designation. The primary difference is packaging format (Tube for both). Both are active products with -65°C to 150°C operating temperature range.

Q: Why do some substitutes show lower power ratings (1.25 W, 1.56 W) compared to the original 15 W?

A: Power dissipation rating reflects the maximum continuous power the device can safely dissipate under specified thermal conditions. Lower ratings indicate different thermal management or package design. For applications where actual power dissipation remains below the lower rating, these parts are suitable. For applications requiring the full 15 W capability, select parts with 15 W ratings (MJD32CT4-A, MJD32C-13, MJD32CQ-13).

Q: Can 2SB1215S-TL-E replace MJD32C in all applications?

A: 2SB1215S-TL-E maintains the 3 A collector current and 100 V breakdown voltage but differs in package type (TP-FA versus DPAK), saturation voltage (0.5 V versus 1.2 V), and frequency response (130 MHz versus unspecified). Substitution is application-dependent. High-frequency switching circuits benefit from the enhanced performance. Low-frequency or DC applications may not require these enhancements. PCB layout modifications are necessary due to package differences.

Q: Is MJD32RLG suitable as a substitute?

A: No. MJD32RLG is rated for 40 V collector-emitter breakdown voltage, compared to 100 V for the MJD32C. Circuits designed for 100 V operation will not function correctly with a 40 V device. MJD32RLG is suitable only for applications with lower voltage requirements.

Q: What is the significance of RoHS3 compliance for all listed parts?

A: RoHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations. All listed substitutes maintain RoHS3 compliance, ensuring compatibility with environmental and regulatory requirements. This compliance status is maintained across all active alternatives.

Q: How does operating temperature range affect part selection?

A: The original MJD32C specifies 150°C maximum junction temperature. MJD32CT4-A maintains this specification. MJD32C-13, MJD32CQ-13, MJD32CG, and NJVMJD32CG extend the lower operating limit to -55°C or -65°C, providing wider temperature range capability. For applications operating at elevated temperatures near 150°C, all listed parts are suitable. For applications requiring operation below 0°C, select parts with extended lower temperature ratings.

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