2N4250 Equivalent & Substitute Parts

Part Overview

The 2N4250 is a PNP bipolar junction transistor (BJT) rated for 40 V collector-emitter breakdown voltage with a maximum power dissipation of 200 mW. Manufactured by Central Semiconductor Corp, this component operates across a temperature range of -55°C to 150°C and features a transition frequency of 50 MHz. The device is packaged in a TO-106-3 domed through-hole configuration.

The 2N4250 is classified as an obsolete product. Locating equivalent substitute parts is necessary for ongoing system maintenance, repair, and redesign applications where original inventory is depleted or procurement becomes impractical.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	40	V
Power - Max	200	mW
Frequency - Transition	50	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-106-3	—
DC Current Gain (hFE) Min @ Ic, Vce	250 @ 10mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	250mV @ 500µA, 10mA	—
Current - Collector Cutoff (Max)	10	nA

Substitute Part Grouping Explanation

Substitution of the 2N4250 is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain a collector-emitter breakdown voltage (BVCEO) of 40 V or greater to ensure safe operation within the original circuit design envelope.

Transistor Polarity: The substitute must be a PNP-type transistor to maintain correct biasing and signal flow in the host circuit.

Mounting Configuration: The substitute must be a through-hole mounted device to ensure mechanical and electrical compatibility with existing printed circuit board layouts.

Operating Temperature Range: The substitute must support the full operating temperature range of -55°C to 150°C or a range that encompasses this specification.

Power Dissipation: The substitute must be capable of handling the maximum power dissipation requirements of the application. Substitutes with equal or greater power ratings are acceptable.

The MJE210G meets all these criteria and is identified as a manufacturer-recommended substitute for the 2N4250.

Parameter Comparison

Parameter	2N4250	MJE210G	Unit
Transistor Type	PNP	PNP	—
Voltage - Collector Emitter Breakdown (Max)	40	40	V
Power - Max	200	15000	mW
Frequency - Transition	50	65	MHz
Operating Temperature Range	-55 to 150	-65 to 150	°C
Mounting Type	Through Hole	Through Hole	—
Current - Collector Cutoff (Max)	10	100	nA

Engineering Selection Recommendations

The MJE210G is suitable as a substitute for the 2N4250 based on the following engineering criteria:

Voltage Rating: Both devices are rated for 40 V collector-emitter breakdown voltage, ensuring equivalent voltage stress handling in the circuit.

Polarity and Mounting: Both are PNP transistors in through-hole packages, maintaining circuit topology and PCB compatibility.

Temperature Range: The MJE210G operating range of -65°C to 150°C encompasses the 2N4250 range of -55°C to 150°C, providing equivalent or superior thermal performance.

Power Capability: The MJE210G is rated for 15 W maximum power dissipation, significantly exceeding the 2N4250 rating of 200 mW. This provides design margin for applications requiring higher power handling.

Compliance Status: The MJE210G is ROHS3 compliant and carries Last Time Buy status, indicating controlled availability. The 2N4250 is classified as obsolete. Both devices are REACH unaffected and carry EAR99 ECCN classification.

Frequency Performance: The MJE210G transition frequency of 65 MHz exceeds the 2N4250 specification of 50 MHz, supporting higher-speed switching applications.

Frequently Asked Questions (FAQ)

Q: Can the MJE210G directly replace the 2N4250 in all applications?

A: The MJE210G meets the critical electrical parameters (voltage rating, polarity, temperature range) and mounting type required for substitution. However, circuit-specific factors such as current requirements, switching speed, and thermal management must be evaluated. The MJE210G supports higher current levels (5 A maximum) and power dissipation (15 W) compared to the 2N4250 (200 mW), making it suitable for applications requiring these enhanced capabilities.

Q: Are there package compatibility issues between the 2N4250 and MJE210G?

A: The 2N4250 uses a TO-106-3 domed package, while the MJE210G uses a TO-126-3 package. Both are through-hole mounted configurations. PCB layout modifications may be required to accommodate the different package footprints. Verify pin spacing and hole diameter compatibility with your specific PCB design before implementation.

Q: What is the significance of the higher DC current gain in the 2N4250?

A: The 2N4250 specifies a minimum DC current gain (hFE) of 250 at 10 mA and 5 V, while the MJE210G specifies 45 at 2 A and 1 V. These measurements are taken at different operating points. The 2N4250 exhibits higher gain at lower current levels, while the MJE210G is optimized for higher current operation. Circuit biasing and load requirements determine which characteristic is relevant for your application.

Q: Is the MJE210G suitable for low-power applications originally designed for the 2N4250?

A: Yes. The MJE210G can operate in low-power applications designed for the 2N4250. The higher power rating and current capability of the MJE210G do not prevent its use in lower-power circuits. Biasing networks and load resistances should be verified to ensure proper operating point establishment.

Q: What compliance certifications apply to both devices?

A: Both the 2N4250 and MJE210G are REACH unaffected and carry EAR99 ECCN classification. The MJE210G is additionally ROHS3 compliant. Verify compliance requirements for your specific application and regulatory jurisdiction before final component selection.

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