MJD2955 Equivalent & Substitute Parts

Part Overview

The MJD2955 is a PNP bipolar junction transistor manufactured by onsemi, rated for 60 V collector-emitter breakdown voltage and 10 A maximum collector current in a surface mount DPAK package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. Active alternatives with identical or enhanced electrical characteristics are available from the same manufacturer and qualified cross-reference sources.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	10	A
Voltage - Collector Emitter Breakdown (Max)	60	V
Vce Saturation (Max)	8	V @ 3.3A, 10A
Power - Max	1.75	W
Frequency - Transition	2	MHz
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—

Substitute Part Grouping Explanation

Substitution of the MJD2955 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type: PNP
Maximum collector current: 10 A
Collector-emitter breakdown voltage: 60 V
Maximum power dissipation: 1.75 W or greater
Package type: DPAK surface mount
Operating temperature range: -55°C to 150°C or wider

Grouping Logic:

Group 1 – Direct Equivalents (onsemi MJD2955 variants): Parts MJD2955G, MJD2955T4G, and NJVMJD2955T4G are direct electrical equivalents manufactured by onsemi with identical electrical specifications. These parts differ only in packaging format (Tube, Cut Tape & Digi-Reel, and Tape & Reel respectively) and product status (Active vs. Obsolete). All three are RoHS3 compliant and suitable for direct replacement.

Group 2 – Cross-Manufacturer Substitute (NXP PHPT60610PYX): The PHPT60610PYX from NXP Semiconductors meets the core electrical requirements (PNP, 10 A, 60 V) but operates at higher transition frequency (85 MHz vs. 2 MHz) and exhibits superior saturation characteristics. This part is classified as a similar substitute rather than a direct equivalent due to package differences (LFPAK56/Power-SO8 vs. DPAK) and enhanced performance parameters.

Parameter Comparison

Parameter	MJD2955	MJD2955G	MJD2955T4G	NJVMJD2955T4G	PHPT60610PYX
Manufacturer	onsemi	onsemi	onsemi	onsemi	NXP Semiconductors
Transistor Type	PNP	PNP	PNP	PNP	PNP
Ic (Max)	10 A	10 A	10 A	10 A	10 A
Vce Breakdown (Max)	60 V	60 V	60 V	60 V	60 V
Vce Saturation (Max)	8 V @ 3.3A, 10A	8 V @ 3.3A, 10A	8 V @ 3.3A, 10A	8 V @ 3.3A, 10A	470 mV @ 1A, 10A
Power - Max	1.75 W	1.75 W	1.75 W	1.75 W	1.5 W
Frequency - Transition	2 MHz	2 MHz	2 MHz	2 MHz	85 MHz
Operating Temperature (TJ)	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	Up to 175°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	SC-100, SOT-669, LFPAK56
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select MJD2955G, MJD2955T4G, or NJVMJD2955T4G based on packaging and supply chain requirements. All three are active products manufactured by onsemi with identical electrical specifications to the obsolete MJD2955. These parts are RoHS3 compliant and maintain the same DPAK package footprint, enabling direct PCB substitution without design modification.

MJD2955G (Tube packaging): Suitable for lower-volume applications and manual assembly processes.
MJD2955T4G (Cut Tape & Digi-Reel): Appropriate for semi-automated pick-and-place assembly with standard tape-and-reel compatibility.
NJVMJD2955T4G (Tape & Reel): Optimized for high-volume automated assembly lines with standard reel specifications.

For Performance-Enhanced Substitution:

The PHPT60610PYX from NXP Semiconductors is a qualified cross-manufacturer substitute when enhanced performance characteristics are acceptable. This part provides superior saturation voltage (470 mV vs. 8 V), higher transition frequency (85 MHz vs. 2 MHz), and extended maximum junction temperature (175°C vs. 150°C). However, the PHPT60610PYX uses a different package (LFPAK56/Power-SO8) requiring PCB layout modification and thermal management reassessment. This substitute is applicable only when design specifications permit package change and the enhanced performance characteristics provide system-level benefits.

Compliance Considerations:

The MJD2955 is RoHS non-compliant. All onsemi direct equivalents (MJD2955G, MJD2955T4G, NJVMJD2955T4G) are RoHS3 compliant, supporting regulatory requirements for new designs and procurement in restricted substance jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can MJD2955G, MJD2955T4G, and NJVMJD2955T4G be used interchangeably on the same PCB?

A: Yes. All three parts are electrically identical and use the same DPAK package. The differences are packaging format (Tube, Cut Tape & Digi-Reel, and Tape & Reel) and are determined by assembly process requirements and supplier logistics, not circuit performance.

Q: What is the primary reason the MJD2955 is classified as obsolete?

A: The MJD2955 is obsolete according to onsemi product status. Active equivalents with identical electrical specifications are available as MJD2955G, MJD2955T4G, and NJVMJD2955T4G. New designs should specify one of these active variants.

Q: Can the PHPT60610PYX replace the MJD2955 without PCB modification?

A: No. The PHPT60610PYX uses package SC-100 (LFPAK56/Power-SO8), which differs from the MJD2955 DPAK package. PCB layout redesign is required, including footprint change, trace routing, and thermal management evaluation. This substitution is applicable only when design specifications permit package change.

Q: What are the key electrical differences between MJD2955 and PHPT60610PYX?

A: Both parts share identical maximum ratings (10 A, 60 V). The PHPT60610PYX exhibits superior saturation characteristics (470 mV vs. 8 V at rated current), operates at higher transition frequency (85 MHz vs. 2 MHz), and supports higher junction temperature (175°C vs. 150°C). These differences make the PHPT60610PYX suitable for high-frequency switching applications and thermally demanding environments.

Q: Are all substitute parts RoHS compliant?

A: The three onsemi direct equivalents (MJD2955G, MJD2955T4G, NJVMJD2955T4G) are RoHS3 compliant. The original MJD2955 is RoHS non-compliant. RoHS compliance status for PHPT60610PYX is not specified in available documentation.

Q: Which substitute part should be selected for high-volume automated assembly?

A: NJVMJD2955T4G is optimized for high-volume automated assembly with standard Tape & Reel packaging. MJD2955T4G (Cut Tape & Digi-Reel) is suitable for semi-automated processes. MJD2955G (Tube) is appropriate for lower-volume or manual assembly operations.

Q: Can the MJD2955 be used in new designs?

A: No. The MJD2955 is obsolete. New designs must specify one of the active equivalents: MJD2955G, MJD2955T4G, or NJVMJD2955T4G. These parts provide identical electrical performance with active product status and regulatory compliance.

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