BC856AW-7-F Equivalent & Substitute Parts

Part Overview

The BC856AW-7-F is a PNP bipolar junction transistor manufactured by Diodes Incorporated, designed for general-purpose switching and amplification applications in surface mount configurations. This device operates at 65 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and 200 mW power dissipation. The part is active in production status and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter ranges.

Key Parameters

Parameter	BC856AW-7-F	Unit
Transistor Type	PNP	—
Collector Current (Max)	100	mA
Collector-Emitter Breakdown Voltage (Max)	65	V
Vce Saturation (Max) @ Ib, Ic	650 mV @ 5 mA, 100 mA	—
Collector Cutoff Current (Max)	15	nA
DC Current Gain (hFE Min) @ Ic, Vce	125 @ 2 mA, 5 V	—
Power Dissipation (Max)	200	mW
Transition Frequency	200	MHz
Operating Temperature Range	-65 to 150	°C
Package	SOT-323 (SC-70)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BC856AW-7-F are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

Transistor Type: PNP
Package: SOT-323 (SC-70) surface mount
Collector Current Rating: 100 mA minimum
Collector-Emitter Breakdown Voltage: 65 V minimum
Power Dissipation: 200 mW minimum
DC Current Gain (hFE): 125 minimum at specified test conditions
Mounting Type: Surface Mount

Grouping Categories:

Group 1 – Direct Electrical Equivalents (Nexperia/NXP Variants) Parts BC856AW,115; BC856AW,135; BC856W,115; BC856W,135; and BC856BW,115; BC856BW,135 share the same base product number BC856 and meet all critical electrical parameters. These parts operate at 100 MHz transition frequency (lower than the main part's 200 MHz) but maintain equivalent saturation voltage, current ratings, and gain specifications. Automotive-grade variants include AEC-Q101 qualification.

Group 2 – Higher Current Capability Substitutes Parts MMBT2907AWT1G and PMST2907A,115 provide 600 mA collector current capability with 60 V breakdown voltage. These parts exceed the current and voltage requirements of the BC856AW-7-F and operate at 200 MHz transition frequency. Vce saturation specifications differ due to higher current ratings.

Group 3 – Enhanced Performance Substitutes Part PBSS5160U,115 provides 700 mA collector current and 60 V breakdown voltage with 415 mW power dissipation, suitable for applications requiring higher current handling.

Group 4 – Manufacturer Variants Part BC856BWT1G (onsemi) maintains 100 mA current rating and 65 V breakdown voltage with 150 mW power dissipation and 100 MHz transition frequency.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Vce Sat mV	hFE Min	Pmax mW	fT MHz	Temp °C	Package	Grade
BC856AW-7-F	Diodes Inc.	100	65	650 @ 5mA, 100mA	125 @ 2mA, 5V	200	200	-65 to 150	SOT-323	Commercial
BC856AW,115	Nexperia USA	100	65	600 @ 5mA, 100mA	125 @ 2mA, 5V	200	100	-40 to 150	SOT-323	Automotive AEC-Q101
BC856AW,135	Nexperia USA	100	65	600 @ 5mA, 100mA	125 @ 2mA, 5V	200	100	-40 to 150	SOT-323	Automotive AEC-Q101
BC856W,115	Nexperia USA	100	65	600 @ 5mA, 100mA	125 @ 2mA, 5V	200	100	-40 to 150	SOT-323	Automotive AEC-Q101
BC856W,135	NXP USA	100	65	600 @ 5mA, 100mA	125 @ 2mA, 5V	200	100	-40 to 150	SOT-323	Automotive AEC-Q101
BC856BW,115	Nexperia USA	100	65	600 @ 5mA, 100mA	220 @ 2mA, 5V	200	100	-40 to 150	SOT-323	Automotive AEC-Q101
BC856BW,135	Nexperia USA	100	65	600 @ 5mA, 100mA	200 @ 2mA, 5V	200	100	-40 to 150	SOT-323	Automotive AEC-Q101
BC856BWT1G	onsemi	100	65	650 @ 5mA, 100mA	220 @ 2mA, 5V	150	100	-55 to 150	SOT-323	Commercial
MMBT2907AWT1G	onsemi	600	60	1.6 @ 50mA, 500mA	100 @ 150mA, 10V	150	200	-55 to 150	SOT-323	Commercial
PBSS5160U,115	Nexperia USA	700	60	340 @ 100mA, 1A	150 @ 500mA, 5V	415	185	-40 to 150	SOT-323	Automotive AEC-Q100
PMST2907A,115	Nexperia USA	600	60	1.6 @ 50mA, 500mA	100 @ 150mA, 10V	200	200	-40 to 150	SOT-323	Automotive AEC-Q101

Engineering Selection Recommendations

Direct Substitution (Recommended for Pin-Compatible Replacement):

Parts BC856AW,115; BC856AW,135; BC856W,115; BC856W,135; BC856BW,115; and BC856BW,135 are direct substitutes for the BC856AW-7-F. All maintain 100 mA collector current, 65 V breakdown voltage, and SOT-323 package compatibility. The Nexperia/NXP variants include automotive-grade AEC-Q101 qualification, providing enhanced reliability for automotive and industrial applications. The BC856BW variants offer higher DC current gain (200–220 minimum) compared to the BC856AW variants (125 minimum), which may improve circuit performance in gain-sensitive applications.

Conditional Substitution (Higher Current Applications):

Parts MMBT2907AWT1G and PMST2907A,115 provide 600 mA collector current capability and are suitable for applications requiring higher current handling than the 100 mA rating of the BC856AW-7-F. These parts operate at 60 V breakdown voltage (5 V lower than the main part) and maintain 200 MHz transition frequency. PMST2907A,115 includes automotive AEC-Q101 qualification. These substitutes are appropriate only when circuit design permits the lower voltage rating and higher current capability.

Extended Performance Substitution:

Part PBSS5160U,115 provides 700 mA collector current and automotive AEC-Q100 qualification. This part is suitable for high-current switching applications but operates at 60 V breakdown voltage and requires circuit design verification for voltage compatibility.

Manufacturer Variant (onsemi):

Part BC856BWT1G (onsemi) maintains electrical equivalence with 100 mA current rating and 65 V breakdown voltage. This part operates at 150 mW maximum power dissipation (lower than the 200 mW rating of the main part) and includes extended temperature range (-55°C to 150°C). Selection of this variant depends on supply chain availability and onsemi qualification requirements.

Product Status Consideration:

All substitute parts listed are active in production status with RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the environmental and regulatory compliance profile of the BC856AW-7-F.

Frequently Asked Questions (FAQ)

Q: Can BC856AW,115 replace BC856AW-7-F in all applications?

A: BC856AW,115 is electrically compatible with BC856AW-7-F for applications operating within 100 mA collector current and 65 V breakdown voltage limits. The primary difference is transition frequency (100 MHz versus 200 MHz). For applications requiring 200 MHz performance, BC856AW,115 is suitable only if circuit bandwidth requirements do not exceed 100 MHz. Both parts use identical SOT-323 packaging and pinout.

Q: What is the difference between BC856AW and BC856BW variants?

A: The BC856AW and BC856BW variants differ in DC current gain (hFE) specification. BC856AW specifies minimum hFE of 125 at 2 mA, 5 V. BC856BW specifies minimum hFE of 200–220 at the same test conditions. Both maintain identical voltage, current, and power ratings. BC856BW is suitable for applications where higher current gain improves circuit performance or reduces base drive requirements.

Q: Are Nexperia BC856 variants automotive-qualified?

A: Yes. BC856AW,115; BC856AW,135; BC856W,115; BC856W,135; BC856BW,115; and BC856BW,135 all include automotive-grade designation with AEC-Q101 qualification. These parts are suitable for automotive and industrial applications requiring enhanced reliability screening and qualification documentation.

Q: Can MMBT2907AWT1G be used as a direct replacement for BC856AW-7-F?

A: MMBT2907AWT1G is not a direct replacement. While both parts use SOT-323 packaging and are PNP transistors, MMBT2907AWT1G provides 600 mA collector current (versus 100 mA) and operates at 60 V breakdown voltage (versus 65 V). This part is suitable only for applications where the higher current capability is required and the 5 V lower voltage rating is acceptable. Circuit design verification is necessary before substitution.

Q: What is the significance of the ",115" and ",135" suffixes in Nexperia part numbers?

A: The ",115" and ",135" suffixes indicate different tape reel configurations or packaging variants within the same electrical specification. Both variants maintain identical electrical parameters and are interchangeable from a functional standpoint. Selection between these variants depends on packaging and supply chain requirements.

Q: Does BC856BWT1G (onsemi) have lower power dissipation than BC856AW-7-F?

A: Yes. BC856BWT1G specifies 150 mW maximum power dissipation compared to 200 mW for BC856AW-7-F. This lower rating may be a limiting factor in high-power applications. However, for typical switching applications operating below 150 mW, BC856BWT1G is suitable. Thermal design verification is recommended for applications approaching the 150 mW limit.

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 environmental compliance profile of BC856AW-7-F.

Q: What is the operating temperature range difference between BC856AW-7-F and its substitutes?

A: BC856AW-7-F operates from -65°C to 150°C. Nexperia automotive variants (BC856AW,115; BC856AW,135; BC856W,115; BC856W,135; BC856BW,115; BC856BW,135) operate from -40°C to 150°C. onsemi variants (BC856BWT1G; MMBT2907AWT1G) operate from -55°C to 150°C. For applications requiring operation below -55°C, BC856AW-7-F is the only suitable option among the listed parts.

Q: Can PBSS5160U,115 be used in place of BC856AW-7-F?

A: PBSS5160U,115 is not a direct replacement. This part provides 700 mA collector current and 60 V breakdown voltage, exceeding the current capability but reducing the voltage rating by 5 V compared to BC856AW-7-F. Substitution is appropriate only for applications where higher current handling is required and the lower voltage rating is acceptable. Circuit design verification is necessary.

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