MJD47T4 Equivalent & Substitute Parts

Part Overview

The MJD47T4 is an obsolete NPN bipolar junction transistor manufactured by onsemi, designed for power switching applications in surface mount DPAK packaging. This device operates at 250 V collector-emitter breakdown voltage with a maximum collector current of 1 A and 15 W power dissipation capability. Due to its obsolete product status, equivalent substitute parts with active availability are necessary for new designs and production continuity.

Substiute Parts

MJD47T4

onsemiIn Stock: 4473MJD47T4 Datasheet

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MJD47T4G

onsemiIn Stock: 18742MJD47T4G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MJD47T4 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor type: NPN configuration
• Collector current rating: 1 A maximum
• Collector-emitter breakdown voltage: 250 V
• Saturation voltage: 1 V @ 200 mA, 1 A
• Collector cutoff current: 200 µA maximum
• DC current gain (hFE): 30 minimum @ 300 mA, 10 V
• Transition frequency: 10 MHz

Mechanical Equivalence Criteria:

• Package type: TO-252-3 DPAK (2 Leads + Tab), SC-63
• Mounting type: Surface Mount

The MJD47T4G qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and compliance certification, not functional performance.

Parameter Comparison

Engineering Selection Recommendations

MJD47T4G is the direct functional equivalent for MJD47T4 applications. Selection between these parts is determined by regulatory and supply chain requirements rather than electrical performance:

Use MJD47T4G when:

• RoHS3 compliance is required for new designs or production
• Active product availability and long-term supply continuity are required
• Tape & Reel packaging is compatible with assembly processes
• Current regulatory standards must be met

Use MJD47T4 when:

• Legacy system maintenance requires exact original part matching
• RoHS non-compliant designs are permitted by application requirements
• Bulk packaging is specified for the application

Both parts share identical electrical characteristics, thermal operating range, and mechanical package specifications. The MJD47T4G is the recommended selection for new applications due to active product status and RoHS3 compliance certification.

Frequently Asked Questions (FAQ)

Q: Can MJD47T4G replace MJD47T4 in existing designs?

A: Yes. The MJD47T4G provides identical electrical performance across all specified parameters including collector current, breakdown voltage, saturation characteristics, and frequency response. The DPAK surface mount package is mechanically identical. Substitution is direct without circuit modification.

Q: What is the difference between MJD47T4 and MJD47T4G?

A: The primary differences are product status and compliance certification. MJD47T4 is obsolete and RoHS non-compliant. MJD47T4G is an active product with ROHS3 compliance. Electrical specifications and package configuration are identical.

Q: Are there packaging differences between these parts?

A: MJD47T4 is supplied in bulk packaging. MJD47T4G is supplied in Tape & Reel (TR) format. Both use the same TO-252-3 DPAK surface mount package. Tape & Reel packaging is standard for automated assembly processes.

Q: What does RoHS3 compliance mean for this transistor?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is required for products sold in the European Union and many other regulated markets.

Q: Can I use MJD47T4G in applications rated for 15 W power dissipation?

A: The MJD47T4G is rated for 1.56 W maximum power dissipation, compared to 15 W for the MJD47T4. For applications requiring the full 15 W rating, the MJD47T4G is not suitable. Verify actual power dissipation requirements in your application before substitution.

Q: Are there any thermal or frequency limitations with MJD47T4G?

A: No. Both parts operate across the identical temperature range (-65°C to 150°C junction temperature) and share the same 10 MHz transition frequency specification. Thermal and frequency performance are equivalent.