BCP56 NPN Bipolar Junction Transistor Equivalent & Substitute Parts

Part Overview

The BCP56 is an NPN bipolar junction transistor manufactured by onsemi, designed for surface mount applications in the SOT-223-4 package. This device operates at a maximum collector current of 1.2 A with a collector-emitter breakdown voltage of 80 V and maximum power dissipation of 1 W. The BCP56 is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Substitute parts maintain electrical compatibility while offering improved availability and extended product lifecycle support.

Key Parameters

Parameter	BCP56 Value	Unit
Transistor Type	NPN	—
Collector Current (Ic) Maximum	1.2	A
Collector-Emitter Breakdown Voltage (VCEO)	80	V
Vce Saturation @ Ib, Ic	500 mV @ 50 mA, 500 mA	—
Collector Cutoff Current (ICBO)	100	nA
DC Current Gain (hFE) @ Ic, Vce	40 @ 150 mA, 2 V	—
Power Dissipation Maximum	1	W
Operating Temperature Range	−55 to 150	°C
Mounting Type	Surface Mount	—
Package	SOT-223-4 (TO-261-4, TO-261AA)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BCP56 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Collector-emitter breakdown voltage (VCEO) must equal or exceed 80 V
Collector current rating must support the application requirement (minimum 1.0 A for most substitutes)
Vce saturation characteristics must remain within 500 mV @ 50 mA, 500 mA
Collector cutoff current (ICBO) must not exceed 100 nA
DC current gain (hFE) minimum must be 40 or greater at specified conditions

Mechanical Compatibility Criteria:

Package must be SOT-223-4 (TO-261-4 or TO-261AA equivalent)
Surface mount mounting type required
Pin configuration must match TO-261-4 standard

Substitute Parts Identified:

All substitute parts listed maintain the core electrical parameters and package compatibility with the BCP56. Substitute parts are grouped into two categories:

onsemi Active Variants (BCP56T1G, BCP56-10T1G, BCP56-16T1G, BCP56-16T3G, BCP56T3G, NSVBCP56-10T3G, SBCP56T1G): These parts share the BCP56 base product number and maintain full electrical compatibility. Differences exist in DC current gain (hFE) specifications, packaging format (Cut Tape vs. Tape & Reel), and product qualifications (automotive grade for SBCP56T1G variant).
Nexperia USA Inc. Variants (BCP56,115, BCP56-10,115, BCP56-10,135): These parts are manufactured by Nexperia USA Inc. and maintain electrical compatibility with identical voltage and current ratings. These variants feature higher transition frequency (180 MHz vs. 130 MHz for onsemi variants) and slightly reduced power dissipation (960 mW vs. 1.5 W).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) A	VCEO V	Power W	hFE @ 150mA, 2V	Frequency MHz	Temp Range °C	Package	Status
BCP56	onsemi	1.2	80	1.0	40	—	−55 to 150	SOT-223-4	Obsolete
BCP56T1G	onsemi	1.0	80	1.5	40	130	−65 to 150	SOT-223	Active
BCP56-10T1G	onsemi	1.0	80	1.5	63	130	−65 to 150	SOT-223	Active
BCP56-16T1G	onsemi	1.0	80	1.5	100	130	−65 to 150	SOT-223	Active
BCP56-16T3G	onsemi	1.0	80	1.5	100	130	−65 to 150	SOT-223	Active
BCP56T3G	onsemi	1.0	80	1.5	40	130	−65 to 150	SOT-223	Active
NSVBCP56-10T3G	onsemi	1.0	80	1.5	63	130	−65 to 150	SOT-223	Active
SBCP56T1G	onsemi	1.0	80	1.5	40	130	−65 to 150	SOT-223	Active
BCP56,115	Nexperia USA Inc.	1.0	80	0.96	63	180	−55 to 150	SOT-223	Active
BCP56-10,115	Nexperia USA Inc.	1.0	80	0.96	63	180	−55 to 150	SOT-223	Active
BCP56-10,135	Nexperia USA Inc.	1.0	80	0.96	63	180	−55 to 150	SOT-223	Active

Engineering Selection Recommendations

Primary Selection Criteria:

For applications requiring direct replacement of the obsolete BCP56, the following active parts are recommended based on product status and compliance:

onsemi Active Variants (Preferred for Standard Applications):

BCP56T1G or BCP56T3G: These parts maintain the lowest hFE specification (40 @ 150 mA, 2 V) matching the original BCP56 DC current gain. Both are ROHS3 compliant with MSL 1 rating. BCP56T1G is available in Cut Tape & Digi-Reel packaging; BCP56T3G is available in Tape & Reel format. Selection between these variants depends on packaging requirements.
BCP56-16T1G: This variant offers the highest DC current gain (100 @ 150 mA, 2 V) among onsemi options, providing improved current amplification characteristics. Suitable for applications where higher gain is beneficial. Available in Cut Tape & Digi-Reel packaging with highest inventory availability (495,300 pcs).
BCP56-10T1G: Provides intermediate DC current gain (63 @ 150 mA, 2 V) with active product status and ROHS3 compliance.

Automotive-Grade Option:

SBCP56T1G: This variant carries AEC-Q101 automotive qualification and is suitable for automotive and harsh environment applications. Maintains hFE specification of 40 @ 150 mA, 2 V. Available in Tape & Reel packaging.

Nexperia USA Inc. Variants (Alternative Manufacturer):

BCP56,115, BCP56-10,115, BCP56-10,135: These parts are manufactured by Nexperia USA Inc. and provide equivalent electrical performance with higher transition frequency (180 MHz). All variants are ROHS3 compliant with MSL 1 rating. These options are suitable when Nexperia sourcing is preferred or when higher frequency performance is advantageous.

Key Differences from Original BCP56:

Substitute parts feature reduced maximum collector current (1.0 A vs. 1.2 A). Applications requiring the full 1.2 A rating must be evaluated for compatibility.
onsemi variants provide enhanced power dissipation (1.5 W vs. 1.0 W), improving thermal performance.
Nexperia variants maintain original power dissipation (960 mW) and offer higher transition frequency (180 MHz).
All substitute parts maintain identical voltage ratings (80 V VCEO) and saturation characteristics.

Frequently Asked Questions (FAQ)

Q: Can BCP56T1G directly replace the obsolete BCP56 in existing designs?

A: BCP56T1G is electrically compatible with BCP56 across all critical parameters: 80 V VCEO, 500 mV saturation voltage, 100 nA ICBO, and 40 hFE minimum. The primary difference is reduced maximum collector current (1.0 A vs. 1.2 A). If the application operates below 1.0 A, direct substitution is valid. The SOT-223 package is mechanically compatible with the original SOT-223-4 footprint.

Q: What is the difference between BCP56-16T1G and BCP56T1G?

A: Both parts are manufactured by onsemi and share identical electrical ratings for voltage (80 V), current (1.0 A), and saturation characteristics. The primary difference is DC current gain: BCP56-16T1G specifies 100 hFE minimum at 150 mA, 2 V, while BCP56T1G specifies 40 hFE minimum. The "-16" designation indicates higher gain. Selection depends on circuit requirements for base drive and amplification characteristics.

Q: Are onsemi and Nexperia variants interchangeable?

A: Yes, onsemi and Nexperia variants are electrically interchangeable for the core parameters: 80 V VCEO, 1.0 A maximum collector current, 500 mV saturation voltage, and 100 nA ICBO. Nexperia variants offer higher transition frequency (180 MHz vs. 130 MHz for onsemi). Both manufacturers' parts are ROHS3 compliant with MSL 1 rating. Selection may depend on supply chain preferences or frequency performance requirements.

Q: What does the hFE specification mean, and why do variants differ?

A: hFE is the DC current gain (beta) of the transistor, measured at specified collector current and collector-emitter voltage. Higher hFE means greater current amplification from base to collector. Variants range from 40 to 100 hFE. The original BCP56 specifies 40 hFE minimum. Higher-gain variants (BCP56-16T1G at 100 hFE) require less base current for the same collector current, reducing base drive requirements. Selection depends on circuit design and available base drive capability.

Q: Is SBCP56T1G suitable for automotive applications?

A: Yes, SBCP56T1G carries AEC-Q101 automotive qualification, making it suitable for automotive and harsh environment applications. It maintains identical electrical specifications to BCP56T1G (80 V VCEO, 1.0 A Ic, 40 hFE minimum) and is ROHS3 compliant. This variant is recommended for automotive designs requiring qualified components.

Q: What is the significance of the packaging designations (CT, TR, Digi-Reel)?

A: Packaging designations indicate the physical format for component delivery. Cut Tape (CT) & Digi-Reel® format provides components on tape suitable for automated pick-and-place equipment with reel compatibility. Tape & Reel (TR) format provides components on continuous tape and reel for high-volume production. Selection depends on manufacturing equipment and volume requirements. All variants maintain identical SOT-223 package dimensions and pin configuration.

Q: Can I use BCP56,115 (Nexperia) if onsemi variants are unavailable?

A: Yes, BCP56,115 is electrically compatible with BCP56 across all critical parameters. It maintains 80 V VCEO, 1.0 A maximum collector current, and 500 mV saturation voltage. The Nexperia variant offers higher transition frequency (180 MHz) and is ROHS3 compliant with MSL 1 rating. This substitution is valid when onsemi parts are unavailable.

Q: What is the operating temperature range difference, and does it matter?

A: The original BCP56 operates from −55°C to 150°C. Most onsemi active variants extend the lower temperature limit to −65°C, providing improved cold-temperature performance. Nexperia variants maintain the original −55°C to 150°C range. For applications operating below −55°C, onsemi variants provide extended capability. For standard commercial temperature ranges, both options are suitable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity level rating. This ensures compatibility with modern manufacturing processes and environmental regulations. All parts are REACH unaffected.

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