MJE270 Equivalent & Substitute Parts

Part Overview

The MJE270 is a Bipolar (BJT) Transistor configured as an NPN Darlington type, rated for 100 V collector-emitter breakdown voltage and 2 A maximum collector current. This through-hole component is housed in a TO-126 package and is designed for applications requiring moderate power dissipation up to 1.5 W with a transition frequency of 6 MHz.

The MJE270 is classified as obsolete. Locating active production alternatives is necessary to ensure long-term component availability, supply chain continuity, and compliance with current regulatory standards for new designs and manufacturing operations.

Substiute Parts

MJE270

onsemiIn Stock: 2369MJE270 Datasheet

Current PartRFQ

MJE270G

onsemiIn Stock: 4375MJE270G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MJE270 is determined by electrical and mechanical parameter equivalence. The substitute part must satisfy all of the following criteria:

• Transistor Configuration: NPN Darlington type
• Maximum Collector Current: 2 A or greater
• Collector-Emitter Breakdown Voltage: 100 V or greater
• Saturation Voltage: 3V @ 1.2mA, 120mA or lower
• Collector Cutoff Current: 1mA or lower
• DC Current Gain (hFE): 1500 @ 120mA, 10V or greater
• Maximum Power Dissipation: 1.5 W or greater
• Transition Frequency: 6MHz or greater
• Operating Temperature Range: -65°C ~ 150°C (TJ) or wider
• Mounting Type: Through Hole
• Package: TO-126 compatible

The MJE270G meets all substitution criteria and is classified as an active production part with current regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The MJE270G is the direct substitute for the MJE270. Both parts are manufactured by onsemi and share identical electrical and mechanical specifications across all critical parameters including collector current, breakdown voltage, saturation characteristics, current gain, power rating, frequency response, and operating temperature range.

The primary distinction between the two parts is product status and regulatory compliance. The MJE270 is obsolete and RoHS non-compliant, while the MJE270G is an active production part with ROHS3 compliance. For new designs, manufacturing operations subject to RoHS directives, or applications requiring long-term component availability, the MJE270G is the appropriate selection.

Both parts are housed in the TO-126 package and are pin-compatible for direct board-level substitution without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the MJE270G be used as a direct replacement for the MJE270 in existing designs?

A: Yes. The MJE270G is electrically and mechanically identical to the MJE270 across all specified parameters. Pin configuration and package dimensions are equivalent, enabling direct substitution without circuit redesign.

Q: What is the primary reason to transition from MJE270 to MJE270G?

A: The MJE270 is classified as obsolete, creating supply chain risk. The MJE270G is an active production part, ensuring continued availability. Additionally, the MJE270G is ROHS3 compliant, meeting current regulatory requirements for manufacturing and distribution in regulated markets.

Q: Are there any performance differences between MJE270 and MJE270G?

A: No. Both parts have identical electrical performance specifications. DC current gain, saturation voltage, breakdown voltage, maximum collector current, power dissipation, transition frequency, and operating temperature range are equivalent.

Q: What is the TO-126 package, and is it standard for both parts?

A: The TO-126 is a three-lead through-hole package for transistors. Both the MJE270 and MJE270G use the TO-126-3 configuration, ensuring mechanical and thermal compatibility in PCB applications.

Q: Does the MJE270G require any circuit modifications when substituting for the MJE270?

A: No circuit modifications are required. The MJE270G is a pin-for-pin equivalent with identical electrical characteristics. Existing PCB layouts and circuit designs require no alteration.

Q: What compliance certifications apply to the MJE270G?

A: The MJE270G is ROHS3 compliant and REACH unaffected. These certifications confirm compliance with European Union directives on hazardous substance restrictions and chemical safety regulations.