BC856AW-G Equivalent & Substitute Parts

Part Overview

The BC856AW-G is an active PNP bipolar junction transistor manufactured by Comchip Technology, designed for surface mount applications in SOT-323 packaging. This component operates at maximum collector current of 100 mA with a collector-emitter breakdown voltage of 65 V, making it suitable for low-power signal switching and amplification circuits. The part is RoHS3 compliant and carries unlimited moisture sensitivity classification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, manufacturing discontinuation, or design flexibility needs.

Substiute Parts

BC856AW-G

Comchip TechnologyIn Stock: 1016BC856AW-G Datasheet

Current PartRFQ

BC856BWT1G

onsemiIn Stock: 38199BC856BWT1G Datasheet

Parametric EquivalentRFQ

SBC856BWT1G

onsemiIn Stock: 17529SBC856BWT1G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BC856AW-G are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Primary Matching Parameters:

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

All identified substitute parts meet these electrical specifications and mechanical requirements. Variations in operating temperature range and manufacturer-specific qualifications are noted but do not disqualify substitution eligibility when electrical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

BC856BWT1G (onsemi): This part is a parametric equivalent to the BC856AW-G with identical electrical specifications and SOT-323 packaging. The operating temperature range is -55 to 150 °C, which is narrower than the main part but covers standard industrial and commercial applications. This part is RoHS3 compliant and carries unlimited moisture sensitivity classification, matching the main part's compliance profile.

SBC856BWT1G (onsemi): This part meets all electrical and mechanical specifications of the BC856AW-G and is additionally qualified to AEC-Q101 automotive standards. The operating temperature range is -55 to 150 °C. Selection of this part is appropriate when automotive-grade qualification is required or when design standards mandate AEC-Q101 compliance. The identical electrical performance and packaging ensure direct substitution capability.

Selection Basis: All three parts share identical core electrical parameters (Ic, Vce, hFE, frequency, power rating) and mechanical compatibility (SOT-323 surface mount package). Differences in operating temperature range and automotive qualification do not affect substitution eligibility for applications within the -55 to 150 °C range. RoHS3 and moisture sensitivity compliance are consistent across all parts.

Frequently Asked Questions (FAQ)

Q: Can BC856BWT1G replace BC856AW-G in all applications?

A: BC856BWT1G is a parametric equivalent with identical electrical specifications and SOT-323 packaging. The operating temperature range of -55 to 150 °C covers standard industrial and commercial applications. If the application requires operation below -55 °C, the BC856AW-G with its -65 °C minimum temperature rating must be retained.

Q: What is the difference between BC856BWT1G and SBC856BWT1G?

A: Both parts have identical electrical specifications and operating temperature ranges (-55 to 150 °C). SBC856BWT1G carries AEC-Q101 automotive qualification, making it suitable for automotive applications or designs requiring automotive-grade component certification. BC856BWT1G is standard grade without automotive qualification.

Q: Are all three parts in the same package?

A: Yes. BC856AW-G, BC856BWT1G, and SBC856BWT1G all use SOT-323 (SC-70) surface mount packaging with three leads. Pin configuration and footprint are identical, enabling direct PCB substitution.

Q: Do these parts have the same RoHS and moisture sensitivity compliance?

A: Yes. All three parts are RoHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture bake-out requirement before soldering.

Q: Which part should be selected for automotive applications?

A: SBC856BWT1G is qualified to AEC-Q101 automotive standards and is the appropriate choice for automotive applications or designs requiring automotive-grade component certification.

Q: Are there any electrical performance differences between the three parts?

A: No. All three parts have identical electrical specifications: 100 mA maximum collector current, 65 V collector-emitter breakdown voltage, 650 mV saturation voltage, 220 minimum DC current gain, 100 MHz transition frequency, and 150 mW maximum power dissipation.