BDW94C-S Equivalent & Substitute Parts

Part Overview

The BDW94C-S is a PNP Darlington bipolar junction transistor manufactured by Bourns Inc., rated for 100 V collector-emitter breakdown voltage and 12 A maximum collector current in a Through Hole TO-220-3 package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Alternative parts must satisfy the electrical and mechanical specifications required for direct replacement or functional substitution in existing applications.

Substiute Parts

BDW94C-S

Bourns Inc.In Stock: 1097BDW94C-S Datasheet

Current PartRFQ

BDW94C

STMicroelectronicsIn Stock: 25847BDW94C Datasheet

DirectRFQ

BDW94C

STMicroelectronicsIn Stock: 25847BDW94C Datasheet

DirectRFQ

BDW94CFTU

onsemiIn Stock: 4474BDW94CFTU Datasheet

SimilarRFQ

BDX34C

STMicroelectronicsIn Stock: 21382BDX34C Datasheet

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TIP147T

STMicroelectronicsIn Stock: 21436TIP147T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BDW94C-S is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: PNP - Darlington configuration
• Voltage Rating: Collector-Emitter Breakdown ≥ 100 V
• Current Rating: Collector Current (Ic) ≥ 12 A
• Saturation Voltage: Vce Saturation ≤ 3 V at specified base and collector currents
• DC Current Gain: hFE ≥ 750 at rated conditions
• Package: TO-220-3 Through Hole mounting
• Compliance: ROHS3 Compliant

Direct Equivalents maintain all electrical parameters and package specifications identical to the BDW94C-S, enabling pin-for-pin replacement without circuit modification.

Similar Substitutes satisfy the core electrical requirements (voltage, current, gain, saturation) but may differ in secondary parameters such as maximum power dissipation, collector cutoff current, or package variant (TO-220F-3 full pack configuration). These parts function equivalently in the application but require verification of thermal management and mechanical mounting compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent - BDW94C (STMicroelectronics)

The BDW94C from STMicroelectronics is the primary direct equivalent to the BDW94C-S. This part maintains identical electrical specifications across all critical parameters: 12 A collector current, 100 V breakdown voltage, 750 hFE minimum gain, and 3 V saturation voltage. The TO-220-3 package provides mechanical compatibility. STMicroelectronics BDW94C is classified as Active product status with ROHS3 compliance and REACH Unaffected designation, ensuring long-term availability and regulatory compliance. The increased maximum power rating (80 W versus 2 W) provides enhanced thermal capability without affecting circuit operation. This part is recommended as the primary replacement for the obsolete BDW94C-S.

Direct Equivalent - BDW94CFTU (onsemi)

The BDW94CFTU from onsemi is functionally equivalent to the BDW94C-S with identical electrical parameters and Active product status. This part uses the TO-220F-3 full pack variant, which maintains TO-220-3 pin compatibility while incorporating a full plastic package design. The 80 W power rating and ROHS3 compliance align with modern manufacturing standards. This part serves as an alternative direct equivalent when onsemi supply chain preference or specific packaging requirements apply.

Similar Substitute - BDX34C (STMicroelectronics)

The BDX34C is a similar substitute with reduced maximum collector current (10 A versus 12 A). This part satisfies applications where the full 12 A rating is not required. The 100 V breakdown voltage, TO-220-3 package, and ROHS3 compliance maintain compatibility with the BDW94C-S footprint and regulatory requirements. The lower saturation voltage (2.5 V at 3 A) and reduced collector cutoff current (500 µA) provide improved switching characteristics in specific circuit topologies. BDX34C is Active status with established supply availability.

Similar Substitute - TIP147T (STMicroelectronics)

The TIP147T is a similar substitute with 10 A maximum collector current and enhanced DC current gain (1000 hFE minimum). This part maintains 100 V breakdown voltage and TO-220-3 package compatibility. The higher power rating (90 W) and improved gain characteristics support applications requiring superior base drive efficiency. TIP147T is Active status with ROHS3 compliance and REACH Unaffected designation. This part is suitable for designs where the 12 A rating is not critical and enhanced gain performance is beneficial.

Frequently Asked Questions (FAQ)

Q: Can BDW94C (STMicroelectronics) directly replace BDW94C-S in existing designs?

A: Yes. The BDW94C maintains identical electrical specifications: 12 A collector current, 100 V breakdown voltage, 750 hFE minimum gain, and 3 V saturation voltage. The TO-220-3 package provides pin-for-pin compatibility. No circuit modifications are required.

Q: What is the difference between BDW94C and BDW94CFTU?

A: Both parts have identical electrical specifications and Active product status. The primary difference is the package variant: BDW94C uses standard TO-220-3, while BDW94CFTU uses TO-220F-3 full pack configuration. Pin assignments and electrical performance are equivalent. Selection depends on mechanical mounting and thermal management requirements.

Q: Can BDX34C or TIP147T be used as substitutes for BDW94C-S?

A: BDX34C and TIP147T are similar substitutes with reduced maximum collector current (10 A versus 12 A). These parts satisfy the 100 V voltage rating, TO-220-3 package, and ROHS3 compliance requirements. They are suitable for applications where 10 A collector current is sufficient. Verify that the application circuit does not require the full 12 A rating before substitution.

Q: What is the significance of the power rating difference between BDW94C-S (2 W) and substitute parts (70-90 W)?

A: The power rating reflects the maximum thermal dissipation capability of the package. The BDW94C-S 2 W rating is conservative; the substitute parts (BDW94C at 80 W, BDW94CFTU at 80 W, BDX34C at 70 W, TIP147T at 90 W) provide enhanced thermal performance. Higher power ratings do not affect circuit operation but improve thermal margin and reliability in high-current applications. Actual power dissipation is determined by circuit conditions, not the part rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts—BDW94C, BDW94CFTU, BDX34C, and TIP147T—are ROHS3 compliant. The BDW94C-S is also ROHS3 compliant. This ensures compatibility with environmental and regulatory requirements across all substitution options.

Q: What is the operating temperature range for substitute parts?

A: The BDW94C-S specifies -65°C to 150°C (TJ). The substitute parts specify 150°C (TJ) maximum. Verify that the application does not require the lower -65°C minimum temperature. For applications requiring extended low-temperature operation, the BDW94C-S specification must be maintained.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: All listed parts are PNP Darlington transistors without specified transition frequency. Darlington configuration inherently limits high-frequency performance due to internal base-emitter junction capacitance. These parts are suitable for low-to-moderate frequency switching applications. For high-frequency requirements, consult detailed frequency response specifications or consider alternative transistor topologies.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: BDW94C-S, BDW94C, BDX34C, and TIP147T specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. BDW94CFTU specifies MSL as Not Applicable. All parts can be stored and handled under standard industrial conditions without special moisture control requirements.