DCP51-13 Equivalent & Substitute Parts

Part Overview

The DCP51-13 is a PNP bipolar junction transistor manufactured by Diodes Incorporated, rated for 45 V collector-emitter breakdown voltage and 1 A maximum collector current. The device is housed in a SOT-223-3 surface mount package and is designed for general-purpose switching and amplification applications. The DCP51-13 is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified parameter ranges while offering active product status and continued availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Ic) Maximum	1	A
Collector-Emitter Breakdown Voltage (Max)	45	V
Vce Saturation (Max)	500	mV @ 50mA, 500mA
Collector Cutoff Current (ICBO)	100	nA
DC Current Gain (hFE) Minimum	40	@ 150mA, 2V
Power Dissipation Maximum	1	W
Transition Frequency	200	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package	SOT-223-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the DCP51-13 are classified into two categories based on electrical parameter compatibility:

Direct Substitutes maintain identical or superior electrical specifications within the same functional envelope. These parts satisfy all critical parameters: 1 A collector current, 45 V minimum collector-emitter breakdown voltage, SOT-223 package compatibility, and equivalent saturation characteristics.

Similar Substitutes provide functional equivalence with variations in secondary parameters such as transition frequency, power dissipation, or collector-emitter breakdown voltage. These parts are suitable for applications where the primary specifications (current, voltage, package) are met, but secondary performance characteristics differ.

Critical substitution parameters:

Collector current rating ≥ 1 A
Collector-emitter breakdown voltage ≥ 45 V
Vce saturation ≤ 500 mV @ specified conditions
SOT-223 package compatibility
Surface mount configuration
RoHS3 compliance

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce(BR) (Max)	Vce Sat (Max)	hFE (Min)	Power (Max)	Freq (MHz)	Temp Range (°C)	Status	Package
DCP51-13	Diodes Inc.	1 A	45 V	500 mV	40	1 W	200	-55 to 150	Obsolete	SOT-223-3
BCP5316TA	Diodes Inc.	1 A	80 V	500 mV	100	2 W	150	-65 to 150	Active	SOT-223-3
BCP51TA	Diodes Inc.	1 A	45 V	500 mV	40	2 W	125	-65 to 150	Active	SOT-223-3
BCP51-16,115	Nexperia USA	1 A	45 V	500 mV	100	1 W	145	-55 to 150	Active	SOT-223
BCP51-16-TP	Micro Commercial	1 A	45 V	500 mV	100	300 mW	100	-55 to 150	Active	SOT-223
BCP52-10,135	Nexperia USA	1 A	60 V	500 mV	63	1.3 W	145	-55 to 150	Active	SOT-223
2STN2540	STMicroelectronics	5 A	40 V	450 mV	150	1.6 W	—	-55 to 150	Active	SOT-223
BCP51,115	Nexperia USA	1 A	45 V	500 mV	63	1 W	145	-55 to 150	Active	SOT-223
BCP51-10,135	Nexperia USA	1 A	45 V	500 mV	63	1 W	145	-55 to 150	Active	SOT-223
BCP51-16,135	Nexperia USA	1 A	45 V	500 mV	100	1 W	145	-55 to 150	Active	SOT-223
FZT790A	onsemi	3 A	40 V	750 mV	300	2 W	100	-55 to 150	Active	SOT-223-4

Engineering Selection Recommendations

Direct Substitutes (Recommended for Pin-Compatible Replacement):

BCP51TA (Diodes Incorporated) and BCP51-16,135 (Nexperia USA Inc.) are the primary direct substitutes for the DCP51-13. Both parts maintain the 1 A collector current rating, 45 V collector-emitter breakdown voltage, and SOT-223 package configuration. BCP51TA is active with extended temperature range (-65°C to 150°C) and increased power dissipation (2 W). BCP51-16,135 is active with AEC-Q100 automotive qualification and 145 MHz transition frequency. Both are RoHS3 compliant with MSL 1 rating.

Enhanced Voltage Rating Substitute:

BCP5316TA (Diodes Incorporated) provides superior voltage rating (80 V) while maintaining 1 A collector current and SOT-223-3 package. This part is suitable for applications requiring higher voltage margin. Power dissipation is increased to 2 W. Product status is active with extended temperature range.

Automotive-Qualified Alternatives:

BCP51-16,115, BCP51,115, and BCP51-10,135 (all Nexperia USA Inc.) offer AEC-Q100 automotive qualification with 45 V rating and 1 A current. These parts are suitable for automotive and industrial applications requiring qualification documentation. All are active with 145 MHz transition frequency.

Higher Current Capability:

2STN2540 (STMicroelectronics) provides 5 A collector current rating with 40 V breakdown voltage. This part is suitable for applications requiring higher current handling. Vce saturation is 450 mV, lower than the DCP51-13 specification. Product status is active.

Selection Criteria:

For direct replacement in existing designs: BCP51TA or BCP51-16,135
For automotive applications: BCP51-16,115, BCP51,115, or BCP51-10,135
For higher voltage margin: BCP5316TA
For higher current requirements: 2STN2540
All recommended substitutes are RoHS3 compliant and MSL 1 rated

Frequently Asked Questions (FAQ)

Q: Can BCP51TA directly replace DCP51-13 in existing PCB layouts?

A: Yes. BCP51TA maintains identical SOT-223-3 package pinout and electrical specifications (1 A, 45 V, 500 mV saturation). The part is pin-compatible and electrically equivalent. BCP51TA is active with extended temperature range and higher power dissipation rating.

Q: What is the difference between BCP51-16,135 and BCP51-16,115?

A: Both parts are Nexperia products with identical electrical specifications (1 A, 45 V, 500 mV saturation, 145 MHz). BCP51-16,135 is supplied in Tape & Reel packaging, while BCP51-16,115 is supplied in Tape & Reel packaging. Both carry AEC-Q100 automotive qualification. Selection depends on packaging and supply chain requirements.

Q: Is BCP5316TA suitable for 45 V applications?

A: Yes. BCP5316TA has an 80 V collector-emitter breakdown rating, which exceeds the 45 V requirement. The part is suitable for 45 V applications and provides additional voltage margin. All other electrical parameters (1 A current, 500 mV saturation) are compatible.

Q: What is the significance of the AEC-Q100 qualification on Nexperia parts?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. Parts with this qualification (BCP51-16,115, BCP51,115, BCP51-10,135) are suitable for automotive applications and applications requiring automotive-grade components. Non-automotive applications do not require this qualification.

Q: Can FZT790A replace DCP51-13?

A: FZT790A is not a direct substitute. While it maintains SOT-223 package compatibility, it has a 3 A collector current rating and 40 V breakdown voltage, which differ from the DCP51-13 specification. FZT790A is suitable only for applications requiring higher current capability and can tolerate lower voltage rating.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the DCP51-13 compliance profile.

Q: What is the difference between SOT-223-3 and SOT-223-4 packages?

A: SOT-223-3 has three leads (Base, Collector, Emitter), while SOT-223-4 has four leads with an additional thermal pad. FZT790A uses SOT-223-4 package. For direct replacement in SOT-223-3 footprints, use parts specified as SOT-223-3 or SOT-223 (three-lead configuration).

Q: Which substitute offers the best thermal performance?

A: BCP5316TA and BCP51TA both offer 2 W power dissipation, compared to 1 W for the DCP51-13. These parts provide improved thermal performance. 2STN2540 offers 1.6 W with lower saturation voltage (450 mV), providing better efficiency in switching applications.

Q: Can I use BCP51-16-TP as a substitute?

A: BCP51-16-TP is electrically compatible (1 A, 45 V, 500 mV saturation) but has reduced power dissipation (300 mW) compared to DCP51-13 (1 W). This part is suitable only for low-power applications where thermal dissipation is not a limiting factor.

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