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BCP51-10,135 PNP Bipolar Junction Transistor Equivalent & Substitute Parts
Part Overview
The BCP51-10,135 is a PNP bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-223 package. This component operates at 45 V collector-emitter breakdown voltage with a maximum collector current of 1 A and 1 W power dissipation. The device is qualified to AEC-Q100 automotive standards and maintains active product status with 4703 units in current inventory.
Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining compatibility with the SOT-223 surface mount package and automotive-grade qualification requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Transistor Type | PNP | — |
| Collector Current (Ic) Maximum | 1 | A |
| Collector-Emitter Breakdown Voltage (Vceo) | 45 | V |
| Vce Saturation @ Ib, Ic | 500 mV @ 50 mA, 500 mA | — |
| Collector Cutoff Current (Icbo) | 100 | nA |
| DC Current Gain (hFE) Minimum @ Ic, Vce | 63 @ 150 mA, 2 V | — |
| Power Dissipation Maximum | 1 | W |
| Transition Frequency | 145 | MHz |
| Operating Temperature Maximum | 150 | °C |
| Package Type | SOT-223 | — |
| Mounting Type | Surface Mount | — |
| Grade | Automotive | — |
| Qualification | AEC-Q100 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for the BCP51-10,135 is determined by strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Transistor type must be PNP
- Collector current rating must be ≥ 1 A
- Collector-emitter breakdown voltage must be ≥ 45 V
- Vce saturation must not exceed 500 mV @ 50 mA, 500 mA
- Collector cutoff current must not exceed 100 nA
- DC current gain (hFE) minimum must be ≥ 63 @ 150 mA, 2 V
- Power dissipation must be ≥ 1 W
- Transition frequency must be ≥ 145 MHz
- Operating temperature maximum must be ≥ 150°C
- Package must be SOT-223 surface mount
- Mounting type must be surface mount
- Grade must be automotive with AEC-Q100 qualification
- RoHS3 compliance required
Parametric Equivalent: Parts meeting all electrical specifications with identical packaging and qualification.
Direct Manufacturer Equivalent: Parts from alternative manufacturers meeting all electrical specifications with identical packaging and qualification.
Similar Parts: Parts meeting core electrical specifications but with variations in secondary parameters such as power dissipation, transition frequency, or DC current gain, provided all minimum thresholds are maintained.
Parameter Comparison
| Part Number | Manufacturer | Ic (Max) A | Vceo (Max) V | Vce Sat mV | hFE Min @ 150mA, 2V | Power W | Freq MHz | Temp °C | Package | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| BCP51-10,135 | Nexperia USA Inc. | 1 | 45 | 500 | 63 | 1 | 145 | 150 | SOT-223 | Active |
| BCP51,115 | Nexperia USA Inc. | 1 | 45 | 500 | 63 | 1 | 145 | 150 | SOT-223 | Active |
| BCP5110TA | Diodes Incorporated | 1 | 45 | 500 | 63 | 2 | 150 | 150 | SOT-223-3 | Active |
| BCP5116H6327XTSA1 | Infineon Technologies | 1 | 45 | 500 | 100 | 2 | 125 | 150 | SOT-223-4 | Last Time Buy |
| BCP5116TA | Diodes Incorporated | 1 | 45 | 500 | 100 | 2 | 150 | 150 | SOT-223-3 | Active |
| BCP51TA | Diodes Incorporated | 1 | 45 | 500 | 40 | 2 | 125 | 150 | SOT-223-3 | Active |
| 2STN2540 | STMicroelectronics | 5 | 40 | 450 | 150 | 1.6 | — | 150 | SOT-223 | Active |
| BCP5216H6327XTSA1 | Infineon Technologies | 1 | 60 | 500 | 100 | 2 | 125 | 150 | SOT-223-4 | Last Time Buy |
| BCP5216TA | Diodes Incorporated | 1 | 60 | 500 | 100 | 2 | 150 | 150 | SOT-223-3 | Active |
| BCP52TA | Diodes Incorporated | 1 | 60 | 500 | 40 | 2 | 125 | 150 | SOT-223-3 | Active |
| FZT1151ATA | Diodes Incorporated | 3 | 40 | 300 | 250 | 2.5 | 145 | 150 | SOT-223-3 | Active |
Engineering Selection Recommendations
Parametric Equivalent (Recommended Primary Substitute):
BCP51,115 from Nexperia USA Inc. is the parametric equivalent substitute. This part maintains identical electrical specifications to the BCP51-10,135, including 1 A collector current, 45 V breakdown voltage, 63 minimum hFE, and 1 W power dissipation. The only difference is packaging format: BCP51,115 is supplied in Cut Tape (CT) & Digi-Reel® format versus Tape & Reel (TR) for the main part. Both parts carry active product status, AEC-Q100 automotive qualification, and ROHS3 compliance. Selection between these two depends on procurement and assembly requirements for packaging format.
Direct Manufacturer Equivalent (Alternative Primary Substitute):
BCP5110TA from Diodes Incorporated meets all electrical requirements with enhanced specifications. This part provides 2 W power dissipation (versus 1 W), 150 MHz transition frequency (versus 145 MHz), and extended operating temperature range of -65°C to 150°C. The part maintains 1 A collector current, 45 V breakdown voltage, and identical saturation characteristics. BCP5110TA is supplied in Tape & Reel format matching the main part's packaging. Active product status and AEC-Q100 qualification are maintained.
Similar Substitutes (Secondary Options):
BCP5116TA and BCP5116H6327XTSA1 from Diodes Incorporated and Infineon Technologies respectively provide enhanced DC current gain (100 minimum hFE versus 63) and 2 W power dissipation. These parts maintain 45 V breakdown voltage and 1 A collector current. BCP5116TA is active; BCP5116H6327XTSA1 is Last Time Buy status.
BCP51TA from Diodes Incorporated provides 2 W power dissipation and 125 MHz transition frequency but exhibits reduced DC current gain (40 minimum hFE). This part is suitable for applications where higher current gain is not required.
BCP5216TA and BCP52TA from Diodes Incorporated provide 60 V breakdown voltage (versus 45 V), offering higher voltage margin. These parts maintain 1 A collector current and are suitable for applications requiring enhanced voltage headroom.
Not Recommended:
2STN2540 from STMicroelectronics exhibits 40 V breakdown voltage, which is below the 45 V requirement of the main part. Although this part provides 5 A collector current and 1.6 W power dissipation, the reduced voltage rating disqualifies it as a direct substitute.
FZT1151ATA from Diodes Incorporated provides 3 A collector current and 2.5 W power dissipation but operates at 40 V breakdown voltage, below the specified 45 V minimum. This part is not suitable as a substitute.
BCP5216H6327XTSA1 and BCP5116H6327XTSA1 from Infineon Technologies carry Last Time Buy status, indicating discontinued product lines. These parts should be avoided for new designs requiring long-term supply assurance.
Frequently Asked Questions (FAQ)
Q: Can BCP51,115 be used as a direct replacement for BCP51-10,135?
A: Yes. BCP51,115 is a parametric equivalent with identical electrical specifications. The only difference is packaging format: BCP51,115 is supplied in Cut Tape & Digi-Reel® format while BCP51-10,135 is Tape & Reel. Both parts are manufactured by Nexperia USA Inc., carry active product status, and meet AEC-Q100 automotive qualification. Selection depends on assembly line compatibility with the packaging format.
Q: What is the difference between BCP5110TA and BCP51-10,135?
A: BCP5110TA from Diodes Incorporated is a direct manufacturer equivalent meeting all electrical requirements of BCP51-10,135. Key differences are: BCP5110TA provides 2 W power dissipation (versus 1 W), 150 MHz transition frequency (versus 145 MHz), and extended operating temperature range (-65°C to 150°C versus 150°C maximum). Collector current, breakdown voltage, and saturation characteristics are identical. Both parts are active and AEC-Q100 qualified.
Q: Why is 2STN2540 not recommended as a substitute?
A: 2STN2540 from STMicroelectronics operates at 40 V collector-emitter breakdown voltage, which is below the 45 V minimum requirement of BCP51-10,135. Although this part provides higher collector current (5 A) and comparable power dissipation (1.6 W), the reduced voltage rating violates the primary substitution criterion and disqualifies it as a suitable replacement.
Q: Can I use BCP5216TA instead of BCP51-10,135?
A: BCP5216TA from Diodes Incorporated can be used in applications where higher voltage margin is beneficial. This part provides 60 V breakdown voltage (versus 45 V) while maintaining 1 A collector current, identical saturation characteristics, and 2 W power dissipation. BCP5216TA is active and AEC-Q100 qualified. Selection depends on circuit requirements for voltage headroom and cost considerations.
Q: What does "Last Time Buy" status mean for BCP5116H6327XTSA1 and BCP5216H6327XTSA1?
A: Last Time Buy status indicates that these products from Infineon Technologies are discontinued and no longer in active production. Existing inventory may be available, but long-term supply cannot be assured. These parts should not be selected for new designs requiring sustained component availability. Active alternatives such as BCP5116TA or BCP5216TA are recommended.
Q: Are all substitute parts RoHS3 compliant and AEC-Q100 qualified?
A: All recommended substitute parts listed in this document are ROHS3 compliant and carry AEC-Q100 automotive qualification, matching the compliance profile of BCP51-10,135. This ensures regulatory and quality standards are maintained across all substitution options.
Q: What is the significance of DC current gain (hFE) differences between substitute parts?
A: DC current gain (hFE) determines the base current required to achieve a specified collector current. BCP51-10,135 specifies 63 minimum hFE @ 150 mA, 2 V. Substitute parts with higher hFE values (such as BCP5116TA at 100 minimum) require less base current for the same collector current, potentially improving circuit efficiency. Parts with lower hFE (such as BCP51TA at 40 minimum) require higher base current. Selection depends on circuit design and base drive availability.
Q: Can I mix different substitute parts in the same assembly?
A: All recommended substitute parts maintain identical electrical performance within the specified parameter ranges and are pin-compatible in SOT-223 surface mount packages. However, mixing different part numbers in the same assembly may complicate inventory management and traceability. It is recommended to standardize on a single substitute part number per design revision.
Q: What packaging format differences exist among substitute parts?
A: Substitute parts are supplied in three packaging formats: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and specialized formats such as PG-SOT223-4. All parts use the SOT-223 surface mount package for component placement. Packaging format affects procurement, handling, and assembly line compatibility but does not impact electrical performance or pin configuration.
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