MJ11032 NPN Darlington Transistor Equivalent & Substitute Parts

Part Overview

The MJ11032 is a Bipolar (BJT) NPN Darlington transistor rated for 120 V collector-emitter breakdown voltage and 50 A maximum collector current in a TO-204 (TO-3) through-hole package. This device is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement.

The MJ11032 is designed for high-current switching and amplification applications requiring robust thermal performance in a standard industrial package. Due to its obsolete status, locating direct functional equivalents with active product availability is essential for system continuity and supply chain management.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN - Darlington	—
Current - Collector (Ic) (Max)	50	A
Voltage - Collector Emitter Breakdown (Max)	120	V
Vce Saturation (Max) @ Ib, Ic	3.5 V @ 500 mA, 50 A	—
Current - Collector Cutoff (Max)	2	mA
DC Current Gain (hFE) (Min) @ Ic, Vce	1000 @ 25 A, 5 V	—
Power - Max	300	W
Operating Temperature	−55 to 200	°C (TJ)
Package / Case	TO-204AE	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the MJ11032 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Transistor Type: NPN - Darlington configuration
Current - Collector (Ic) (Max): 50 A
Voltage - Collector Emitter Breakdown (Max): 120 V
Vce Saturation (Max) @ Ib, Ic: 3.5 V @ 500 mA, 50 A
Current - Collector Cutoff (Max): 2 mA
DC Current Gain (hFE) (Min) @ Ic, Vce: 1000 @ 25 A, 5 V
Power - Max: 300 W
Operating Temperature: −55 to 200 °C (TJ)

Mechanical Equivalence Criteria:

Package / Case: TO-204AE
Mounting Type: Through Hole

The MJ11032G meets all specified electrical and mechanical parameters and is classified as an active product, making it a direct functional equivalent suitable for replacement in applications currently using the obsolete MJ11032.

Parameter Comparison

Parameter	MJ11032 (Obsolete)	MJ11032G (Active)	Match
Transistor Type	NPN - Darlington	NPN - Darlington	✓
Current - Collector (Ic) (Max)	50 A	50 A	✓
Voltage - Collector Emitter Breakdown (Max)	120 V	120 V	✓
Vce Saturation (Max) @ Ib, Ic	3.5 V @ 500 mA, 50 A	3.5 V @ 500 mA, 50 A	✓
Current - Collector Cutoff (Max)	2 mA	2 mA	✓
DC Current Gain (hFE) (Min) @ Ic, Vce	1000 @ 25 A, 5 V	1000 @ 25 A, 5 V	✓
Power - Max	300 W	300 W	✓
Operating Temperature	−55 to 200 °C (TJ)	−55 to 200 °C (TJ)	✓
Package / Case	TO-204AE	TO-204AE	✓
Mounting Type	Through Hole	Through Hole	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

The MJ11032G is the direct equivalent for the obsolete MJ11032 based on complete electrical and mechanical parameter alignment. Selection of the MJ11032G is supported by the following factors:

Product Status: The MJ11032G carries an active product status, ensuring ongoing availability and supply chain continuity. The MJ11032 is obsolete and subject to discontinuation.

Regulatory Compliance: The MJ11032G is ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components. The original MJ11032 is RoHS non-compliant and does not satisfy modern procurement standards.

Electrical Performance: All electrical parameters are identical between the two parts, including collector current rating, breakdown voltage, saturation characteristics, current gain, power dissipation, and operating temperature range. No circuit redesign or performance adjustment is required.

Mechanical Compatibility: Both parts use the TO-204AE package with through-hole mounting, ensuring direct physical compatibility in existing PCB layouts and assembly processes.

The MJ11032G is the appropriate selection for new designs and replacement of obsolete MJ11032 inventory.

Frequently Asked Questions (FAQ)

Q: Can the MJ11032G be used as a direct replacement for the MJ11032 in existing applications?

A: Yes. The MJ11032G is electrically and mechanically identical to the MJ11032 across all specified parameters. No circuit modifications, PCB layout changes, or performance adjustments are required for substitution.

Q: What is the primary difference between the MJ11032 and MJ11032G?

A: The MJ11032G is the active production equivalent of the obsolete MJ11032. The MJ11032G is ROHS3 compliant, while the MJ11032 is RoHS non-compliant. All electrical and mechanical specifications are identical.

Q: Are there any packaging differences between the MJ11032 and MJ11032G?

A: Both parts are supplied in the TO-204AE package with through-hole mounting. The MJ11032 was supplied in bulk form, while the MJ11032G is supplied in trays. The physical package and pin configuration are identical.

Q: What collector current and voltage ratings apply to the MJ11032G?

A: The MJ11032G is rated for a maximum collector current of 50 A and a maximum collector-emitter breakdown voltage of 120 V. These ratings are identical to the MJ11032.

Q: Is the MJ11032G suitable for high-temperature applications?

A: Yes. The MJ11032G operates across a junction temperature range of −55 to 200 °C (TJ), matching the operating temperature range of the MJ11032. This range supports both cryogenic and elevated-temperature industrial applications.

Q: What is the DC current gain of the MJ11032G?

A: The minimum DC current gain (hFE) is 1000 at a collector current of 25 A and collector-emitter voltage of 5 V. This specification is identical to the MJ11032.

Q: Does the MJ11032G meet modern regulatory requirements?

A: Yes. The MJ11032G is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component procurement and use.

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