MJF6388G Equivalent & Substitute Parts

Part Overview

The MJF6388G is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for high-current switching and amplification applications. This device features a 100 V collector-emitter breakdown voltage rating and supports collector currents up to 10 A in a Through Hole TO-220FP package. The part is currently in active production status with 3100 units available in inventory.

Equivalent and substitute parts are identified when design requirements permit component interchange due to matching or superior electrical and mechanical specifications within the same functional category. Substitute parts may be necessary due to supply chain constraints, manufacturing discontinuation, or design flexibility in non-critical applications.

Substiute Parts

MJF6388G

onsemiIn Stock: 3151MJF6388G Datasheet

Current PartRFQ

BDW94CFTU

onsemiIn Stock: 4474BDW94CFTU Datasheet

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BDW93CFP

STMicroelectronicsIn Stock: 1139BDW93CFP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MJF6388G are identified based on the following critical parameters that determine functional compatibility:

Matching Criteria:

• Transistor polarity and Darlington configuration
• Collector-emitter breakdown voltage (100 V minimum)
• Collector current capability (10 A minimum for direct substitution)
• Saturation voltage characteristics
• Through Hole TO-220 package family
• RoHS3 compliance and REACH unaffected status
• Operating temperature range compatibility

Substitution Logic: Parts are grouped as equivalent when they maintain the same transistor type (NPN or PNP Darlington), voltage rating, and package form factor. Parts with higher current ratings or power dissipation capabilities are considered suitable substitutes when the application does not require the specific lower power rating of the original part. Polarity differences (NPN vs. PNP) restrict substitution to circuit designs that accommodate the alternative polarity.

Parameter Comparison

Engineering Selection Recommendations

BDW93CFP (STMicroelectronics): The BDW93CFP is a direct NPN Darlington substitute for the MJF6388G. Both devices share identical transistor polarity, voltage rating (100 V), and saturation voltage characteristics. The BDW93CFP supports 12 A collector current, exceeding the MJF6388G specification of 10 A, and provides 33 W power dissipation compared to 2 W in the original part. This part is suitable for applications where the circuit topology and current requirements are compatible with NPN Darlington operation. Both parts are ROHS3 compliant and REACH unaffected. Inventory availability is 1103 units.

BDW94CFTU (onsemi): The BDW94CFTU is a PNP Darlington alternative manufactured by onsemi. This part shares the same 100 V voltage rating and saturation voltage specification as the MJF6388G but operates with opposite polarity. The BDW94CFTU supports 12 A collector current and provides 80 W power dissipation. This substitute is applicable only in circuit designs that accommodate PNP Darlington operation in place of NPN. Both parts are from the same manufacturer (onsemi), ROHS3 compliant, and REACH unaffected. Inventory availability is 4400 units.

All substitute parts maintain compliance with RoHS3 and REACH regulations, ensuring regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can the BDW93CFP directly replace the MJF6388G in any circuit?

A: The BDW93CFP is a direct polarity substitute for the MJF6388G, as both are NPN Darlington transistors with identical 100 V voltage ratings and saturation voltage characteristics. Direct substitution is possible in circuits designed for NPN Darlington operation. The higher current rating (12 A vs. 10 A) and power dissipation (33 W vs. 2 W) of the BDW93CFP do not prevent substitution but indicate enhanced capability for higher-current applications.

Q: Why is the BDW94CFTU listed as a substitute if it is PNP polarity?

A: The BDW94CFTU is listed as a substitute for applications where circuit topology permits PNP Darlington operation. In complementary or push-pull circuit configurations, PNP and NPN Darlington pairs are often used together. The BDW94CFTU matches the voltage and saturation specifications of the MJF6388G, making it suitable for such applications. Direct substitution in NPN-only circuits is not possible without circuit redesign.

Q: Are all substitute parts available in the same TO-220FP package?

A: The MJF6388G and BDW93CFP are both supplied in TO-220FP packaging. The BDW94CFTU is supplied in TO-220F-3 packaging. Both TO-220FP and TO-220F-3 are TO-220-3 Full Pack variants with identical pin configurations and Through Hole mounting compatibility, ensuring mechanical interchangeability on standard PCB layouts.

Q: What is the significance of the different power ratings among these parts?

A: The MJF6388G is rated for 2 W maximum power dissipation, while the BDW93CFP supports 33 W and the BDW94CFTU supports 80 W. These ratings reflect the thermal design and junction temperature capability of each device. Higher power ratings indicate greater thermal capacity and suitability for sustained high-current operation. Selection should be based on the actual power dissipation requirements of the application, not the maximum rating alone.

Q: Are there differences in DC current gain (hFE) between these parts?

A: Yes. The MJF6388G specifies a minimum hFE of 3000 at 3 A and 4 V. Both substitute parts (BDW93CFP and BDW94CFTU) specify a minimum hFE of 750 at 5 A and 3 V. The lower hFE value in the substitutes reflects measurement at different operating conditions. Applications requiring the specific hFE characteristic of the MJF6388G should verify compatibility before substitution.

Q: Do all parts meet the same regulatory compliance standards?

A: Yes. The MJF6388G, BDW93CFP, and BDW94CFTU are all ROHS3 compliant and REACH unaffected. All parts carry EAR99 ECCN classification and the same HTSUS code (8541.29.0095), confirming equivalent regulatory status for procurement and use.