BC856CW-G Equivalent & Substitute Parts

Part Overview

The BC856CW-G is a PNP bipolar junction transistor manufactured by Comchip Technology, designed for general-purpose switching and amplification applications. This Surface Mount device in SOT-323 package delivers 100 mA collector current, 65 V collector-emitter breakdown voltage, and 150 mW maximum power dissipation. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or supply chain optimization.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	65	V
Vce Saturation (Max) @ Ib, Ic	650 mV @ 5 mA, 100 mA	—
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) Min @ Ic, Vce	220 @ 2 mA, 5 V	—
Power - Max	150	mW
Frequency - Transition	100	MHz
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BC856CW-G are classified based on strict electrical and mechanical parameter equivalence. The substitution logic is determined by the following criteria:

Primary Equivalence Parameters:

Transistor Type: PNP
Collector Current (Ic Max): 100 mA
Collector-Emitter Breakdown Voltage: 65 V
Package Type: SOT-323 / SC-70
Mounting: Surface Mount
Frequency - Transition: 100 MHz

Secondary Compatibility Parameters:

Vce Saturation characteristics
DC Current Gain (hFE)
Power dissipation capability
Operating temperature range
RoHS and compliance status

Substitute parts are grouped into two categories:

MFR Recommended Equivalent: BC856AW,115 (Nexperia USA Inc.) — Meets all primary parameters with enhanced power rating (200 mW) and automotive qualification.
Parametric Equivalents: BC856BWT1G and SBC856BWT1G (onsemi) — Identical electrical specifications to the main part with automotive-grade certification available for SBC856BWT1G.

Parameter Comparison

Parameter	BC856CW-G (Comchip)	BC856AW,115 (Nexperia)	BC856BWT1G (onsemi)	SBC856BWT1G (onsemi)
Transistor Type	PNP	PNP	PNP	PNP
Ic (Max)	100 mA	100 mA	100 mA	100 mA
Vce Breakdown (Max)	65 V	65 V	65 V	65 V
Vce Saturation @ 5mA, 100mA	650 mV	600 mV	650 mV	650 mV
Icbo (Max)	15 nA	15 nA	15 nA	15 nA
hFE (Min) @ 2mA, 5V	220	125	220	220
Power (Max)	150 mW	200 mW	150 mW	150 mW
Frequency - Transition	100 MHz	100 MHz	100 MHz	100 MHz
Operating Temperature	-65 to 150°C	to 150°C	-55 to 150°C	-55 to 150°C
Package	SOT-323	SOT-323	SC-70-3 (SOT323)	SC-70-3 (SOT323)
Automotive Grade	—	AEC-Q101	—	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

BC856AW,115 (Nexperia USA Inc.) is the MFR recommended substitute. This part maintains all primary electrical parameters while offering increased power dissipation (200 mW vs. 150 mW). The part carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components. Vce saturation is improved at 600 mV compared to 650 mV. DC current gain is lower (125 vs. 220), which may affect circuit gain calculations in high-impedance applications.

BC856BWT1G (onsemi) is a parametric equivalent with identical electrical specifications to BC856CW-G. This part provides the highest inventory availability (38,100 pcs) and maintains the same power rating and hFE characteristics. Operating temperature range is -55 to 150°C, which is narrower at the lower end compared to the main part (-65°C minimum).

SBC856BWT1G (onsemi) is an automotive-grade parametric equivalent with AEC-Q101 qualification. Electrical specifications are identical to BC856BWT1G. This part is suitable for automotive applications requiring certified components. Inventory availability is 17,463 pcs.

All substitute parts are Active status, ROHS3 compliant, and MSL 1 (Unlimited moisture sensitivity). Selection should be based on application requirements for automotive qualification, power dissipation margin, and current gain specifications.

Frequently Asked Questions (FAQ)

Q: Can BC856AW,115 replace BC856CW-G in all applications?

A: BC856AW,115 is electrically compatible for applications where the lower DC current gain (125 vs. 220) does not impact circuit performance. The improved Vce saturation (600 mV) and higher power rating (200 mW) make it suitable for most general-purpose switching applications. Verify circuit gain requirements before substitution.

Q: What is the difference between BC856BWT1G and SBC856BWT1G?

A: Both parts have identical electrical specifications and are manufactured by onsemi. SBC856BWT1G carries AEC-Q101 automotive qualification, while BC856BWT1G does not. Select SBC856BWT1G for automotive applications requiring certified components.

Q: Are all substitute parts pin-compatible with BC856CW-G?

A: Yes. All substitute parts use SOT-323 / SC-70 package with identical pinout. Physical and electrical pin compatibility is maintained across all listed substitutes.

Q: What is the operating temperature difference between BC856CW-G and the onsemi substitutes?

A: BC856CW-G operates from -65 to 150°C. BC856BWT1G and SBC856BWT1G operate from -55 to 150°C. The onsemi parts have a 10°C higher minimum operating temperature. Verify application requirements for low-temperature operation below -55°C.

Q: Which substitute has the best inventory availability?

A: BC856BWT1G (onsemi) has the highest inventory with 38,100 pcs in stock, followed by BC856AW,115 (Nexperia) with 4,100 pcs, and SBC856BWT1G (onsemi) with 17,463 pcs.

Q: Are all parts RoHS compliant?

A: Yes. BC856CW-G and all substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

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