BDW47 Equivalent & Substitute Parts

Part Overview

The BDW47 is a PNP Darlington bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 15 A maximum collector current in a Through Hole TO-220-3 package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

BDW47

onsemiIn Stock: 2973BDW47 Datasheet

Current PartRFQ

BDW47G

onsemiIn Stock: 3963BDW47G Datasheet

DirectRFQ

TIP147T

STMicroelectronicsIn Stock: 21436TIP147T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BDW47 are classified based on electrical parameter compatibility and package equivalence. The primary substitution criteria are:

Direct Electrical Equivalence Parameters:

• Transistor type: PNP - Darlington configuration
• Collector-emitter breakdown voltage: 100 V
• Maximum collector current: 15 A or greater
• DC current gain (hFE): 1000 minimum at specified conditions
• Vce saturation characteristics: 3 V maximum at rated conditions
• Package type: TO-220-3 Through Hole

Compliance Considerations:

• RoHS3 compliance status for modern procurement requirements
• Product status (Active vs. Obsolete) for long-term availability

Parts are grouped as follows:

Direct Manufacturer Equivalent: BDW47G (onsemi) — identical electrical specifications with RoHS3 compliance upgrade.

Similar Manufacturer Alternative: TIP147T (STMicroelectronics) — reduced maximum collector current (10 A vs. 15 A) and power rating (90 W vs. 85 W), with active product status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

BDW47G (Direct Equivalent): BDW47G is the primary substitute for BDW47. It maintains identical electrical specifications across all rated parameters, including 15 A maximum collector current, 100 V breakdown voltage, and 85 W power dissipation. The BDW47G provides RoHS3 compliance, addressing regulatory requirements for new designs and procurement. Both parts share obsolete product status; however, BDW47G has higher inventory availability (3950 Pcs vs. 2900 Pcs). This part is suitable for direct replacement in existing designs without circuit modification.

TIP147T (Alternative Substitute): TIP147T is a viable substitute when collector current requirements do not exceed 10 A. This part maintains the 100 V breakdown voltage and TO-220-3 package compatibility. TIP147T offers active product status, ensuring long-term availability and supply chain continuity. The 90 W power rating exceeds the BDW47 specification, providing thermal margin. TIP147T is RoHS3 compliant. Selection of TIP147T is appropriate for applications where the 15 A maximum current of BDW47 is not required, and where active product status is prioritized for future procurement.

Frequently Asked Questions (FAQ)

Q: Can BDW47G be used as a direct replacement for BDW47?

A: Yes. BDW47G is electrically and mechanically equivalent to BDW47. All electrical parameters, including collector current (15 A), breakdown voltage (100 V), saturation voltage, current gain, and power rating (85 W), are identical. The TO-220-3 package and Through Hole mounting are unchanged. BDW47G is suitable for direct substitution without circuit redesign.

Q: What are the limitations of using TIP147T as a substitute?

A: TIP147T has a maximum collector current rating of 10 A, compared to 15 A for BDW47. Applications requiring collector currents between 10 A and 15 A cannot use TIP147T. The transition frequency specification is not provided for TIP147T, whereas BDW47 specifies 4 MHz. The operating temperature range for TIP147T is specified only at the maximum (150°C), without a minimum temperature specification. These differences require circuit analysis to confirm compatibility.

Q: Are all substitute parts available in the same package?

A: Yes. BDW47, BDW47G, and TIP147T are all supplied in TO-220-3 Through Hole packages. Pin configuration and mechanical dimensions are identical, allowing direct socket compatibility.

Q: What is the significance of RoHS compliance status?

A: BDW47 is RoHS non-compliant, while BDW47G and TIP147T are RoHS3 compliant. RoHS3 compliance is required for products sold into European markets and many other regulated regions. For new designs or procurement in regulated markets, RoHS3-compliant alternatives (BDW47G or TIP147T) are necessary.

Q: Which substitute should be selected for new designs?

A: For new designs requiring 15 A collector current, BDW47G is the appropriate choice, providing full electrical equivalence with RoHS3 compliance. For applications where collector current does not exceed 10 A and active product status is prioritized, TIP147T is suitable. Both parts are compatible with the TO-220-3 package footprint.

Q: What is the difference in product status between these parts?

A: BDW47 and BDW47G are both classified as obsolete, indicating discontinued manufacturing. TIP147T is classified as active, indicating current production and ongoing availability. For long-term supply chain security, TIP147T is preferred when electrical specifications permit its use.

Q: Are there differences in DC current gain specifications?

A: No. All three parts specify a minimum DC current gain (hFE) of 1000 at 5 A collector current and 4 V collector-emitter voltage. This parameter is identical across BDW47, BDW47G, and TIP147T.