KSH127TM PNP Darlington Transistor Equivalent & Substitute Parts

Part Overview

The KSH127TM is a PNP Darlington bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 8 A maximum collector current in a surface mount DPAK package. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements where the original part is no longer readily procurable.

Substiute Parts

KSH127TM

onsemiIn Stock: 2114KSH127TM Datasheet

Current PartRFQ

MJD127G

onsemiIn Stock: 2509MJD127G Datasheet

DirectRFQ

MJD127T4G

onsemiIn Stock: 37476MJD127T4G Datasheet

DirectRFQ

NJVMJD127T4G

onsemiIn Stock: 20154NJVMJD127T4G Datasheet

DirectRFQ

MJD127T4

STMicroelectronicsIn Stock: 28666MJD127T4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSH127TM is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transistor Type: PNP - Darlington configuration
• Current - Collector (Ic) (Max): 8 A
• Voltage - Collector Emitter Breakdown (Max): 100 V
• Vce Saturation (Max) @ Ib, Ic: 4V @ 80mA, 8A
• Current - Collector Cutoff (Max): 10µA
• DC Current Gain (hFE) (Min) @ Ic, Vce: 1000 @ 4A, 4V
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Mounting Type: Surface Mount

All substitute parts listed maintain these core electrical specifications and physical package requirements. Variations in maximum power rating, frequency response, and operating temperature range do not preclude substitution when the application requirements fall within the specified limits of the substitute part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (onsemi Manufacturer):

MJD127G, MJD127T4G, and NJVMJD127T4G are active product alternatives from onsemi. All three maintain electrical equivalence to the KSH127TM across critical parameters. MJD127G and MJD127T4G are rated for 1.75 W maximum power, matching the original specification. NJVMJD127T4G provides enhanced power dissipation capability at 20 W, suitable for applications requiring thermal margin. MJD127G and MJD127T4G include 4 MHz transition frequency specification. All onsemi substitutes support extended operating temperature range from -65°C to 150°C, compared to the KSH127TM upper limit of 150°C.

Cross-Manufacturer Substitute (STMicroelectronics):

MJD127T4 from STMicroelectronics maintains full electrical equivalence and identical DPAK package configuration. This part is rated for 20 W maximum power and operates to 150°C maximum junction temperature. The STMicroelectronics option provides supply chain diversification while preserving all critical electrical parameters.

Compliance and Certification:

All substitute parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level remains at MSL 1 (unlimited) across all alternatives. These certifications ensure regulatory compatibility with the original KSH127TM in existing designs.

Frequently Asked Questions (FAQ)

Q: Can MJD127G directly replace KSH127TM in existing circuit designs?

A: Yes. MJD127G maintains electrical equivalence across all critical parameters: 8 A collector current, 100 V breakdown voltage, 4V saturation voltage at specified conditions, and 1000 minimum DC current gain. The DPAK package pinout is identical. Active product status ensures continued availability.

Q: What is the difference between MJD127T4G and NJVMJD127T4G?

A: Both parts are electrically equivalent with identical electrical specifications. The primary difference is maximum power rating: MJD127T4G is rated for 1.75 W, while NJVMJD127T4G is rated for 20 W. Selection depends on thermal dissipation requirements in the application. Both are packaged in DPAK and support -65°C to 150°C operating range.

Q: Is the STMicroelectronics MJD127T4 suitable as a substitute?

A: Yes. MJD127T4 from STMicroelectronics provides full electrical equivalence and identical DPAK package. It is rated for 20 W maximum power and operates to 150°C. This part enables supply chain flexibility while maintaining circuit compatibility.

Q: Does the extended operating temperature range of substitute parts affect compatibility?

A: No. The extended temperature range of onsemi substitutes (-65°C to 150°C) is a superset of the KSH127TM specification (150°C maximum). Applications operating within the original temperature limits remain fully compatible. The extended range provides additional design margin for temperature-sensitive applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level, matching the original KSH127TM compliance status. REACH status is unaffected for all alternatives.

Q: What packaging options are available for substitute parts?

A: MJD127G is supplied in Tube packaging. MJD127T4G and NJVMJD127T4G are supplied in Cut Tape (CT) and Digi-Reel packaging. All parts use identical TO-252-3 DPAK physical package. Packaging selection depends on production volume and handling requirements.

Q: Can I use MJD127T4 (STMicroelectronics) in high-volume production?

A: Yes. MJD127T4 is an active product with 28,600 pieces in stock inventory. Cross-manufacturer substitution is valid when electrical specifications and package requirements are met. Qualification procedures should follow standard component change management protocols.