BDW93B-BP Equivalent & Substitute Parts

Part Overview

The BDW93B-BP is a Bipolar (BJT) NPN transistor manufactured by Micro Commercial Co, rated for 80V collector-emitter breakdown voltage and 12A maximum collector current in a Through Hole TO-220AB package. This component is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging and product status considerations.

Substiute Parts

BDW93B-BP

Micro Commercial CoIn Stock: 806BDW93B-BP Datasheet

Current PartRFQ

KSE44H11

onsemiIn Stock: 1931KSE44H11 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BDW93B-BP is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a Collector-Emitter Breakdown Voltage (VCEO) of 80V or greater to ensure safe operation within the original design envelope.

Current Rating: The substitute part must support a maximum collector current (Ic) sufficient for the application. The BDW93B-BP specifies 12A maximum; substitute parts with lower ratings require circuit-level verification of current demands.

Package Compatibility: Both the main part and substitute must use Through Hole mounting in TO-220-3 or equivalent mechanical form factor to ensure PCB compatibility and thermal management characteristics.

Product Status and Compliance: Active product status ensures ongoing availability and supply chain reliability. RoHS3 compliance is mandatory for regulatory adherence.

The KSE44H11 meets the voltage and package requirements but operates at a reduced maximum collector current of 10A, representing a functional substitute for applications not requiring the full 12A specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration - Product Status: The BDW93B-BP is classified as Obsolete, creating supply chain risk for new production and long-term support. The KSE44H11 is Active status, ensuring continued availability and manufacturing support from onsemi.

Compliance Alignment: Both parts maintain ROHS3 compliance, satisfying regulatory requirements for electronic component procurement and assembly.

Current Rating Differential: The KSE44H11 specifies a maximum collector current of 10A compared to the BDW93B-BP's 12A rating. Selection of the KSE44H11 is appropriate for applications operating at or below 10A continuous collector current. Applications requiring sustained operation above 10A require alternative substitute evaluation or circuit redesign.

Power Dissipation: The BDW93B-BP is rated for 80W maximum power dissipation, while the KSE44H11 is rated for 1.67W. This significant difference reflects different thermal design assumptions. The KSE44H11 is suitable for lower-power switching applications; high-power linear or switching applications may require thermal management reassessment.

Electrical Characteristics: The KSE44H11 exhibits lower saturation voltage (1V at specified conditions versus 3V) and lower collector cutoff current (10µA versus 100µA), indicating superior switching performance characteristics in low-level signal applications.

Frequently Asked Questions (FAQ)

Q: Can the KSE44H11 directly replace the BDW93B-BP in all applications?

A: Direct replacement is limited by the KSE44H11's reduced maximum collector current (10A versus 12A) and power rating (1.67W versus 80W). Replacement is valid for applications operating within these reduced specifications. Applications requiring the full 12A or 80W capability require alternative evaluation.

Q: Are the TO-220-3 packages mechanically identical?

A: Both parts use Through Hole TO-220-3 packaging, ensuring mechanical compatibility with existing PCB layouts and thermal management hardware. No mechanical redesign is required for package substitution.

Q: What is the significance of the DC Current Gain (hFE) difference?

A: The BDW93B-BP specifies hFE minimum of 1000 at 3A and 3V, while the KSE44H11 specifies 60 at 2A and 1V. These measurements occur at different operating points. The KSE44H11's lower hFE value reflects measurement at lower current and voltage conditions. Circuit designs relying on specific gain characteristics at particular operating points require verification against the actual measurement conditions provided in each datasheet.

Q: Does the KSE44H11 frequency specification affect substitution?

A: The KSE44H11 specifies a transition frequency of 50MHz. This parameter is not provided for the BDW93B-BP. The 50MHz specification indicates the KSE44H11 is suitable for switching applications up to this frequency. Applications requiring higher frequency operation require evaluation against specific frequency requirements.

Q: What is the impact of the Vce saturation voltage difference?

A: The KSE44H11 exhibits lower saturation voltage (1V at 400mA, 8A versus 3V at 100mA, 10A for the BDW93B-BP). Lower saturation voltage reduces power dissipation during saturation, improving efficiency in switching applications. This represents an advantage for low-power switching designs.

Q: Are there moisture sensitivity or handling differences?

A: The BDW93B-BP specifies Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture-related handling restrictions. The KSE44H11 specifies MSL as Not Applicable, also indicating no moisture sensitivity. Both parts use standard handling procedures without special moisture control requirements.