BC856AW-QF Equivalent & Substitute Parts

Part Overview

The BC856AW-QF is an active-status PNP bipolar junction transistor manufactured by Nexperia USA Inc., qualified to AEC-Q101 automotive standards. This surface-mount device in SOT-323 packaging is designed for general-purpose switching and amplification applications requiring 65 V collector-emitter breakdown voltage and 100 mA maximum collector current. Substitute parts are identified when electrical characteristics, mechanical packaging, and compliance certifications remain equivalent across manufacturing variants and part number designations.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	65	V
Current - Collector (Ic) (Max)	100	mA
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA	—
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	125 @ 2 mA, 5 V	—
Power - Max	200	mW
Frequency - Transition	100	MHz
Operating Temperature (TJ)	150	°C
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the BC856AW-QF are identified based on strict equivalence across the following criteria:

Electrical Parameters (Must Match):

Transistor type: PNP
Collector-emitter breakdown voltage: 65 V
Maximum collector current: 100 mA
Vce saturation: 600 mV @ 5 mA, 100 mA
Collector cutoff current: 15 nA
DC current gain (hFE): 125 minimum @ 2 mA, 5 V
Maximum power dissipation: 200 mW
Transition frequency: 100 MHz
Operating temperature: 150°C

Mechanical Parameters (Must Match):

Package type: SOT-323 (SC-70)
Mounting type: Surface Mount

Compliance Parameters (Must Match):

Automotive grade qualification: AEC-Q101
RoHS3 compliance
REACH unaffected status

Substitute parts differ only in manufacturer part number designation, packaging format (Tape & Reel versus Bulk), and moisture sensitivity level (MSL) ratings. All listed substitutes maintain identical electrical performance and are functionally interchangeable within the specified operating parameters.

Parameter Comparison

Parameter	BC856AW-QF	BC856AW,115	BC856AW,135	BC856BW-QX	BC856W,115	BC856W,135
Transistor Type	PNP	PNP	PNP	PNP	PNP	PNP
Voltage - Collector Emitter Breakdown (Max)	65 V	65 V	65 V	65 V	65 V	65 V
Current - Collector (Ic) (Max)	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA
Current - Collector Cutoff (Max)	15 nA	15 nA	15 nA	15 nA	15 nA	15 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	125 @ 2 mA, 5 V	125 @ 2 mA, 5 V	125 @ 2 mA, 5 V	125 @ 2 mA, 5 V	125 @ 2 mA, 5 V	125 @ 2 mA, 5 V
Power - Max	200 mW	200 mW	200 mW	200 mW	200 mW	200 mW
Frequency - Transition	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C	150°C
Package / Case	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Automotive	Automotive	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	AEC-Q101	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Bulk

Engineering Selection Recommendations

All listed substitute parts maintain active product status and are manufactured by Nexperia USA Inc. (or NXP USA Inc. for BC856W,135) with AEC-Q101 automotive qualification and ROHS3 compliance. Selection among equivalent parts is determined by:

Packaging Format Considerations:

BC856AW-QF, BC856AW,115, BC856AW,135, BC856BW-QX, and BC856W,115 are supplied in Tape & Reel format, suitable for automated assembly processes.
BC856W,135 is supplied in Bulk format, appropriate for manual assembly or alternative distribution requirements.

Moisture Sensitivity Level (MSL) Considerations:

BC856AW-QF specifies MSL 3 (168-hour shelf life limitation).
BC856AW,115, BC856AW,135, BC856BW-QX, and BC856W,115 specify MSL 1 (unlimited shelf life).
BC856W,135 does not specify MSL rating in provided data.

Parts with MSL 1 rating provide extended storage capability without baking requirements. Selection should align with supply chain logistics and manufacturing floor conditions.

Inventory Availability:

BC856W,115: 20,408 units
BC856W,135: 25,279 units
BC856AW,135: 10,789 units
BC856BW-QX: 1,182 units
BC856AW,115: 4,100 units
BC856AW-QF: 742 units

All substitute parts are electrically and mechanically equivalent and may be selected based on packaging format, MSL requirements, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Are all listed BC856 variants electrically identical?

A: Yes. All listed parts—BC856AW-QF, BC856AW,115, BC856AW,135, BC856BW-QX, BC856W,115, and BC856W,135—share identical electrical specifications: 65 V breakdown voltage, 100 mA maximum collector current, 200 mW power dissipation, 100 MHz transition frequency, and 125 minimum DC current gain at specified conditions.

Q: What is the difference between BC856AW-QF and BC856W,115?

A: The primary differences are packaging format and moisture sensitivity level. BC856AW-QF is supplied in Tape & Reel with MSL 3 (168-hour limitation). BC856W,115 is supplied in Tape & Reel with MSL 1 (unlimited shelf life). Electrical performance and SOT-323 package dimensions are identical.

Q: Can BC856W,135 (Bulk packaging) be used in place of BC856AW-QF (Tape & Reel)?

A: Yes, from an electrical and mechanical standpoint. BC856W,135 is electrically equivalent and uses the same SOT-323 surface-mount package. However, Bulk packaging is not suitable for automated pick-and-place assembly. Selection depends on assembly process requirements.

Q: What does AEC-Q101 qualification mean for these parts?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. All listed BC856 variants carry this qualification, confirming suitability for automotive applications and compliance with automotive reliability and quality requirements.

Q: Are all BC856 variants RoHS3 compliant?

A: Yes. All listed parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and automotive applications.

Q: What is the significance of MSL 1 versus MSL 3?

A: Moisture Sensitivity Level (MSL) indicates shelf-life limitations under specified humidity conditions. MSL 3 parts (BC856AW-QF) require baking if exposed to humidity for more than 168 hours before soldering. MSL 1 parts have unlimited shelf life without baking requirements, reducing manufacturing process complexity.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All listed BC856 variants are pin-compatible in SOT-323 packaging and electrically equivalent across all specified parameters. Direct substitution is supported without circuit modification.

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