BCP68 Equivalent & Substitute Parts

Part Overview

The BCP68 is an NPN bipolar junction transistor manufactured by onsemi, rated for 20 V collector-emitter breakdown voltage and 1 A maximum collector current in a surface mount SOT-223-4 package. The device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. Substitute parts are selected based on matching or exceeding electrical specifications while maintaining package compatibility and compliance standards.

Substiute Parts

BCP68

onsemiIn Stock: 70889BCP68 Datasheet

Current PartRFQ

BCP68T1G

onsemiIn Stock: 35467BCP68T1G Datasheet

DirectRFQ

SBCP68T1G

onsemiIn Stock: 16072SBCP68T1G Datasheet

DirectRFQ

BCP68,115

NXP USA Inc.In Stock: 4375BCP68,115 Datasheet

DirectRFQ

DCP68-13

Diodes IncorporatedIn Stock: 15691DCP68-13 Datasheet

DirectRFQ

BCP68-25,115

Nexperia USA Inc.In Stock: 8781BCP68-25,115 Datasheet

SimilarRFQ

BCP68-25,135

Nexperia USA Inc.In Stock: 4864BCP68-25,135 Datasheet

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CBCP68 TR PBFREE

Central Semiconductor CorpIn Stock: 2440CBCP68 TR PBFREE Datasheet

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PBSS302NZ,135

Nexperia USA Inc.In Stock: 9065PBSS302NZ,135 Datasheet

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PBSS4021NZ,115

Nexperia USA Inc.In Stock: 9281PBSS4021NZ,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter alignment with the BCP68:

Direct Equivalents maintain identical or superior electrical specifications across all critical parameters: collector current (1 A), collector-emitter breakdown voltage (20 V), saturation voltage, DC current gain, and power dissipation. These parts differ primarily in packaging format, product status, or manufacturer identity while preserving functional interchangeability.

Similar Alternatives share the core voltage and package specifications but deviate in collector current capacity, power rating, or transition frequency. These parts are suitable for applications where the BCP68 specifications exceed actual circuit requirements.

Key Parameters for Substitution Determination:

• Transistor Type: NPN (mandatory match)
• Voltage - Collector Emitter Breakdown: 20 V minimum
• Current - Collector (Ic) Max: 1 A minimum for direct equivalents
• Package / Case: TO-261-4 or TO-261AA (mandatory match)
• Vce Saturation: 500mV @ 100mA, 1A (or lower)
• DC Current Gain (hFE): 85 minimum @ 500mA, 1V
• RoHS Status: ROHS3 Compliant (mandatory match)

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents for Pin-Compatible Replacement:

BCP68T1G (onsemi) is the primary direct equivalent, offering identical electrical specifications with active product status. This part maintains the 1 A collector current, 20 V breakdown voltage, and 500 mV saturation voltage of the original BCP68. The extended temperature range (-65°C to 150°C) provides broader operational coverage. Packaging is SOT-223 (TO-261), maintaining mechanical compatibility.

BCP68,115 (NXP USA Inc. / Nexperia) provides an alternative direct equivalent with active status. This part meets all core electrical requirements with enhanced transition frequency (170 MHz) and improved collector cutoff current specification (100 nA versus 10 µA). Compliance with ROHS3 and MSL-1 standards is maintained.

CBCP68 TR PBFREE (Central Semiconductor Corp) offers direct electrical equivalence with superior power dissipation capability (2 W versus 1.5 W). Active product status and extended temperature range (-65°C to 150°C) support long-term availability. This part is suitable for applications requiring additional thermal margin.

Higher Current Capacity Alternatives:

BCP68-25,115 and BCP68-25,135 (Nexperia USA Inc.) provide 2 A collector current capacity with 20 V breakdown voltage. These parts are suitable for applications where the original 1 A specification is marginal. Both variants maintain SOT-223 package compatibility and active product status. The higher DC current gain (160 versus 85) reduces base drive requirements.

PBSS302NZ,135 (Nexperia USA Inc.) and PBSS4021NZ,115 (Nexperia USA Inc.) offer significantly higher current capacity (5.8 A and 8 A respectively) with improved saturation voltage characteristics. These parts are qualified to AEC-Q100 automotive standards and carry active product status. Selection is appropriate for high-current applications where the BCP68 current rating is insufficient.

Compliance and Availability Considerations:

All substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. Active product status is confirmed for BCP68T1G, BCP68,115, DCP68-13, BCP68-25,115, BCP68-25,135, CBCP68 TR PBFREE, PBSS302NZ,135, and PBSS4021NZ,115, supporting long-term procurement and design continuity.

Frequently Asked Questions (FAQ)

Q: Can BCP68T1G directly replace BCP68 in existing designs?

A: Yes. BCP68T1G maintains identical electrical specifications for collector current (1 A), breakdown voltage (20 V), saturation voltage (500 mV), and DC current gain (85). The SOT-223 package is mechanically compatible with the original SOT-223-4 footprint. Extended temperature range (-65°C to 150°C) provides additional operational margin.

Q: What is the difference between BCP68,115 and BCP68T1G?

A: Both parts meet the core BCP68 electrical specifications. BCP68,115 is manufactured by NXP USA Inc. (Nexperia brand) with enhanced transition frequency (170 MHz versus 60 MHz) and improved collector cutoff current specification (100 nA versus 10 µA). BCP68T1G is manufactured by onsemi. Selection depends on supplier availability and design margin requirements.

Q: Are the BCP68-25 variants suitable replacements?

A: BCP68-25,115 and BCP68-25,135 are suitable for applications where collector current exceeds 1 A but does not exceed 2 A. These parts maintain the 20 V breakdown voltage and SOT-223 package compatibility. The higher DC current gain (160 versus 85) reduces base drive current requirements. Saturation voltage increases to 600 mV at rated current, which may affect switching performance in low-voltage applications.

Q: What is the advantage of PBSS302NZ,135 or PBSS4021NZ,115 over standard BCP68 replacements?

A: PBSS302NZ,135 provides 5.8 A collector current with significantly lower saturation voltage (250 mV at 5.8 A). PBSS4021NZ,115 provides 8 A collector current with 170 mV saturation voltage. Both parts are qualified to AEC-Q100 automotive standards. Selection is appropriate for high-current switching applications where the original 1 A specification is insufficient or where low saturation voltage is critical for efficiency.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL-1 moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and storage requirements.

Q: Does package format affect substitution?

A: All substitute parts use SOT-223 or SOT-223-3 packaging, which is mechanically compatible with the original BCP68 SOT-223-4 footprint. Packaging format differences (Tape & Reel, Cut Tape, Bulk) do not affect electrical performance or PCB mounting compatibility.

Q: Which substitute part offers the best long-term availability?

A: BCP68T1G, BCP68,115, DCP68-13, BCP68-25,115, BCP68-25,135, CBCP68 TR PBFREE, PBSS302NZ,135, and PBSS4021NZ,115 all carry active product status. BCP68T1G and BCP68,115 are recommended as primary choices due to direct electrical equivalence and established market presence.

Q: Can CBCP68 TR PBFREE be used in high-temperature applications?

A: Yes. CBCP68 TR PBFREE supports operating temperatures from -65°C to 150°C, matching the extended range of BCP68T1G. The 2 W power rating provides additional thermal margin compared to the original BCP68 (1.5 W), making it suitable for applications requiring sustained operation at elevated temperatures.