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MJ2955

Name: MJ2955
Rating: 4.7 (12 reviews)

TRANS PNP 60V 15A TO3

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製造商。部分 #MJ2955
包 TO-204AA, TO-3
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規格

Supplier	Solid State Inc.
Package	Bulk
ProductStatus	Active
TransistorType	PNP
Current-Collector(Ic)(Max)	15 A
Voltage-CollectorEmitterBreakdown(Max)	60 V
VceSaturation(Max)@IbIc	3V @ 3.3A, 10A
Current-CollectorCutoff(Max)	700µA
DCCurrentGain(hFE)(Min)@IcVce	20 @ 4A, 4V
Power-Max	115 W
Frequency-Transition	2.5MHz
OperatingTemperature	-65°C ~ 200°C (TJ)
MountingType	Through Hole
Package/Case	TO-204AA, TO-3

概述

Description

MJ2955 is a PNP power transistor, the complementary partner to MJ3055 (the NPN version). It is commonly used in older power amps and linear regulators.
Key points:
- Package: metal TO-3 style; collector is connected to the case, base and emitter on two pins.
- Ratings: Vceo about 60 V, Ic up to 15 A, and roughly 60 W total power dissipation (at Tc = 25°C). TJ max around 150°C.
- Electronics: hFE typically in the ~20–70 range depending on Ic and temperature.
- Use: suitable for push-pull output stages and as a pass transistor in regulators; often found in vintage audio gear and power supplies.
- Alternatives: TIP2955/TIP3055 or MJE2955/MJE3055 in different packages.
Caveat: being a vintage device, availability varies; check datasheet for exact pinout and thermal requirements before design.

Features

MJ2955 features (concise):
- PNP silicon power transistor
- Complement of MJ2954 (NPN)
- Vceo (max) ≈ 60 V; Ic (max) ≈ 15 A
- Power dissipation about 60 W with proper heatsinking
- Package: TO-3 metal can (collector tab serves as heat sink)
- Gain (hFE) roughly 25–70 depending on current and temperature
- Junction temp rating up to ~150 °C
- Used in linear regulators, power supplies, audio amplifiers, motor drives
- Requires adequate base drive and heat sinking for full performance
Note: values may vary slightly by manufacturer; check exact datasheet for the specific device.

Package

The MJ2955 is a PNP power transistor typically supplied in a TO-3 metal-can package (some manufacturers also offer TO-66 or other variants).

Pinout

- Type: PNP silicon power transistor (complement of MJ3055).
- Pin count/terminals:
- TO-220 package: 3 pins — pin 1 Base, pin 2 Collector, pin 3 Emitter.
- TO-3 package: case is Collector, with two leads for Base and Emitter (three electrical terminals total).

Manufacturer

MJ2955 was manufactured by Motorola. Motorola is an American multinational corporation known for electronics, telecommunications equipment, and semiconductors.

Application

MJ2955 is a PNP power transistor (complement to TIP3055), rated about 60 V and 15 A.
Common applications:
- Push-pull power/output stages in audio amplifiers
- Linear regulators / high-current pass elements for power supplies
- General high-current switching/regulator circuits and hobby power projects

Equivalent

MJ2955 is a PNP power transistor (complement to the NPN 2N3055). Direct equivalents include MJ2955 variants (MJ2955G) and legacy 2N2955 / 2N2955A. Possible substitutes (only if ratings match) are other PNP power transistors such as TIP42C or 2SB1171. Always verify Vce, Ic, Pd and hFE before replacing.