BDW93 Equivalent & Substitute Parts

Part Overview

The BDW93 is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for through-hole mounting in TO-220-3 package configuration. This component is rated for 45 V collector-emitter breakdown voltage and 12 A maximum collector current, with an 80 W power dissipation capability. The BDW93 is classified as obsolete, necessitating identification of equivalent substitute components for new designs and ongoing production requirements. Active substitute parts with compatible electrical and mechanical specifications are available to ensure design continuity and supply chain reliability.

Substiute Parts

BDW93

onsemiIn Stock: 1921BDW93 Datasheet

Current PartRFQ

BDW93C

STMicroelectronicsIn Stock: 21675BDW93C Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BDW93 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following parameters:

Critical Matching Parameters:

• Transistor Type: NPN - Darlington configuration
• Current - Collector (Ic) (Max): 12 A minimum
• Vce Saturation characteristics: 3 V @ 100 mA, 10 A
• Current - Collector Cutoff (Max): 1 mA maximum
• DC Current Gain (hFE) (Min): 750 @ 5 A, 3 V
• Power - Max: 80 W
• Operating Temperature: 150°C (TJ)
• Mounting Type: Through Hole
• Package / Case: TO-220-3

Allowable Variation Parameter:

• Voltage - Collector Emitter Breakdown (Max): Substitute parts may exceed the 45 V specification of the main part, provided all other electrical characteristics remain within specified limits. Higher voltage ratings provide enhanced design margin without compromising functionality in 45 V applications.

The BDW93C from STMicroelectronics qualifies as a direct substitute, meeting all critical parameters while providing an elevated voltage rating of 100 V, and maintains active product status with full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

BDW93C (STMicroelectronics) - Primary Substitute

The BDW93C is the recommended substitute for the obsolete BDW93. This component maintains identical electrical performance across all critical parameters including collector current, saturation voltage, current gain, power dissipation, and operating temperature. The BDW93C features an elevated voltage rating of 100 V compared to the 45 V specification of the original part, providing additional design margin without performance degradation in applications operating at or below 45 V.

The BDW93C is classified as an active product with full RoHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory alignment. Inventory availability of 21,570 units supports production requirements. The component is supplied in tube packaging and maintains the identical TO-220-3 through-hole package configuration, enabling direct mechanical and electrical substitution without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the BDW93C directly replace the BDW93 in existing designs?

A: Yes. The BDW93C provides direct electrical and mechanical substitution. All critical electrical parameters match the BDW93 specification, and the TO-220-3 package configuration is identical. The elevated 100 V voltage rating of the BDW93C does not affect compatibility in applications designed for 45 V operation.

Q: What is the significance of the higher voltage rating on the BDW93C?

A: The BDW93C voltage rating of 100 V exceeds the BDW93 specification of 45 V. This higher rating provides additional design margin and transient protection without altering the component's performance in circuits operating within the original 45 V specification. The substitute part is fully compatible with existing circuit designs.

Q: Are there packaging differences between the BDW93 and BDW93C?

A: Both components use the TO-220-3 through-hole package configuration. The BDW93C is supplied in tube packaging, while the original BDW93 packaging specification was not detailed. This difference does not affect electrical or mechanical compatibility in circuit applications.

Q: What compliance certifications apply to the BDW93C?

A: The BDW93C is RoHS3 compliant and REACH unaffected. Both components share identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications.

Q: Why is the BDW93 classified as obsolete?

A: The BDW93 is no longer in active production. The BDW93C from STMicroelectronics serves as the active equivalent, providing identical functionality with enhanced voltage specification and confirmed long-term availability.