MJH11021 Equivalent & Substitute Parts

Part Overview

The MJH11021 is a PNP Darlington bipolar junction transistor manufactured by onsemi, rated for 250 V collector-emitter breakdown voltage and 15 A maximum collector current. This device is designed for high-power switching and amplification applications requiring robust current handling in a through-hole package configuration.

The MJH11021 carries an obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this transistor topology.

Substiute Parts

MJH11021

onsemiIn Stock: 1412MJH11021 Datasheet

Current PartRFQ

MJH11021G

onsemiIn Stock: 2096MJH11021G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MJH11021 is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Functional Equivalence):

• Transistor topology: PNP Darlington configuration
• Maximum collector current: 15 A
• Collector-emitter breakdown voltage: 250 V
• DC current gain (hFE): 400 minimum at specified bias conditions
• Maximum power dissipation: 150 W
• Transition frequency: 3 MHz
• Saturation voltage characteristics: 4 V @ 150 mA, 15 A
• Collector cutoff current: 1 mA maximum
• Operating temperature range: -65°C to 150°C

Mechanical Parameters (Required for Physical Compatibility):

• Mounting type: Through Hole
• Package compatibility: Devices in TO-218-3 or equivalent footprints

Substitute parts must satisfy all electrical parameters identically and maintain through-hole mounting compatibility. Package form factor variations are permissible when pin configuration and thermal characteristics remain functionally equivalent.

Parameter Comparison

Engineering Selection Recommendations

MJH11021G as Primary Substitute:

The MJH11021G is a direct electrical equivalent to the MJH11021, maintaining identical electrical specifications across all critical parameters: collector current, breakdown voltage, saturation characteristics, current gain, power rating, and frequency response. Both devices operate across the same temperature range and share identical base product lineage.

The MJH11021G differs in package form factor (TO-247-3 versus TO-218-3) and product status. The TO-247-3 package provides equivalent through-hole mounting with different lead geometry and thermal characteristics suitable for high-power applications.

Compliance Considerations:

The MJH11021G holds Active product status, ensuring ongoing manufacturer support and supply availability. The substitute part is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the original MJH11021 is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 export classification.

Package Compatibility:

PCB layout modifications are required when transitioning from TO-218-3 to TO-247-3 packaging. The TO-247-3 package accommodates higher thermal dissipation through improved lead geometry and mounting surface area. Mechanical mounting provisions and thermal interface design must be evaluated for the specific application context.

Frequently Asked Questions (FAQ)

Q: Can MJH11021G directly replace MJH11021 in existing designs?

A: Electrical substitution is complete. The MJH11021G maintains identical electrical performance across all specified parameters. Physical PCB layout modifications are required due to package form factor differences between TO-218-3 and TO-247-3. Mounting hole spacing, lead positioning, and thermal interface design must be adapted to accommodate the TO-247-3 package geometry.

Q: What are the key differences between MJH11021 and MJH11021G?

A: Electrical specifications are identical. Primary differences are: (1) Package form factor: TO-218-3 versus TO-247-3; (2) Product status: Obsolete versus Active; (3) RoHS compliance: Non-compliant versus ROHS3 Compliant; (4) Packaging format: Loose versus Tube. All electrical parameters, including current rating, voltage rating, gain, and frequency response, are equivalent.

Q: Are there thermal performance differences between the two packages?

A: The TO-247-3 package provides enhanced thermal characteristics through improved lead design and mounting surface area compared to TO-218-3. Thermal interface design and mounting methodology must be evaluated for the specific application to ensure adequate heat dissipation in both configurations.

Q: What compliance certifications apply to each part?

A: MJH11021 is RoHS non-compliant and carries obsolete product status. MJH11021G is ROHS3 compliant with Active product status. Both parts are REACH Unaffected and classified as EAR99 for export purposes. Regulatory requirements for the end application determine which compliance level is necessary.

Q: Can I use MJH11021G in new designs?

A: Yes. MJH11021G is the recommended choice for new designs. Active product status ensures supply continuity and manufacturer support. ROHS3 compliance satisfies current environmental regulations. Electrical equivalence with MJH11021 ensures functional compatibility with existing circuit topologies designed for the original part.

Q: What is the inventory status for these parts?

A: MJH11021 has 1,320 pieces in stock with obsolete status. MJH11021G has 2,085 pieces in stock with active status. Supply availability favors MJH11021G for ongoing production requirements.