BC847CW/SNF Equivalent & Substitute Parts

Part Overview

The BC847CW/SNF is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This device operates at a maximum collector current of 100 mA with a collector-emitter breakdown voltage of 45 V and a transition frequency of 100 MHz. The part is housed in a surface mount SC-70 (SOT-323) package and is qualified to AEC-Q101 automotive standards.

The BC847CW/SNF is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and ongoing production requirements. Equivalent parts maintain identical or superior electrical characteristics within the specified parameter ranges, while substitute parts may exhibit variations in specific parameters such as saturation voltage or DC current gain while remaining functionally compatible for most applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	400 mV @ 5 mA, 100 mA	—
Current - Collector Cutoff (Max)	15	nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	420 @ 2 mA, 5 V	—
Power - Max	200	mW
Frequency - Transition	100	MHz
Operating Temperature (TJ)	150	°C
Package / Case	SC-70, SOT-323	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC847CW/SNF is determined by electrical parameter compatibility within the following criteria:

Primary Substitution Parameters:

Transistor Type: NPN (mandatory match)
Maximum Collector Current (Ic): 100 mA (minimum requirement)
Collector-Emitter Breakdown Voltage (VCEO): 45 V (minimum requirement)
Maximum Power Dissipation: 200 mW (minimum requirement)
Transition Frequency: 100 MHz (minimum requirement)
Package Type: SC-70 or SOT-323 (mechanical compatibility)

Secondary Variation Parameters:

Vce Saturation: Values up to 600 mV are acceptable for general switching applications
DC Current Gain (hFE): Minimum values of 110 or higher are acceptable
Collector Cutoff Current (ICBO): Values up to 20 nA are acceptable
Operating Temperature Range: Extended ranges are acceptable

Compliance Requirements:

RoHS3 compliance (mandatory)
Automotive grade and AEC-Q101 qualification preferred for automotive applications
MSL rating of 1 (Unlimited) preferred

Substitute parts are organized into three categories: Direct Equivalents (identical electrical specifications), Parametric Equivalents (minor parameter variations within acceptable ranges), and Similar Parts (different manufacturers with comparable performance characteristics).

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	VCEO (Max) V	Vce Sat (Max) mV	hFE (Min) @ 2mA, 5V	fT (MHz)	Power (Max) mW	Package	Grade	AEC-Q101
BC847CW/SNF	Nexperia USA Inc.	Obsolete	100	45	400	420	100	200	SC-70, SOT-323	Automotive	Yes
BC847CW,135	Nexperia USA Inc.	Active	100	45	400	420	100	200	SC-70, SOT-323	—	—
BC847CW,115	Nexperia USA Inc.	Active	100	45	400	420	100	200	SC-70, SOT-323	—	—
BC847CW-QF	Nexperia USA Inc.	Active	100	45	400	420	100	200	SC-70, SOT-323	Automotive	Yes
BC847CW-QX	Nexperia USA Inc.	Active	100	45	400	420	100	200	SC-70, SOT-323	Automotive	Yes
BC847CW/DG/B4X	Nexperia USA Inc.	Active	100	45	400	420	100	200	SC-70, SOT-323	Automotive	Yes
BC850CW,115	Nexperia USA Inc.	Active	100	45	600	420	100	200	SC-70, SOT-323	Automotive	Yes
BC850CW,135	Nexperia USA Inc.	Active	100	45	600	420	100	200	SC-70, SOT-323	Automotive	Yes
BC847AW-7-F	Diodes Incorporated	Active	100	45	600	110	300	200	SC-70, SOT-323	—	—
BC847BW-TP	Micro Commercial Co	Active	100	45	600	200	100	—	SC-70, SOT-323	—	—
BC847CWT1G	onsemi	Active	100	45	600	420	100	150	SC-70, SOT-323	—	—

Engineering Selection Recommendations

For Automotive Applications (AEC-Q101 Required):

The BC847CW-QF, BC847CW-QX, and BC847CW/DG/B4X are direct replacements for the obsolete BC847CW/SNF. These parts maintain identical electrical specifications and automotive qualification. BC847CW-QF and BC847CW-QX are preferred due to active product status and full AEC-Q101 compliance. BC850CW,115 and BC850CW,135 are acceptable substitutes with higher saturation voltage (600 mV vs. 400 mV) but retain automotive qualification and identical current, voltage, and frequency ratings.

For General-Purpose Applications (Non-Automotive):

BC847CW,135 and BC847CW,115 are direct electrical equivalents with active status. BC847AW-7-F (Diodes Incorporated) and BC847BW-TP (Micro Commercial Co) are functionally compatible alternatives from different manufacturers. BC847CWT1G (onsemi) is compatible with slightly reduced maximum power dissipation (150 mW vs. 200 mW).

Selection Priority:

BC847CW-QF or BC847CW-QX for automotive applications requiring AEC-Q101 certification
BC847CW,135 or BC847CW,115 for general-purpose applications with Nexperia sourcing preference
BC850CW,115 or BC850CW,135 when higher saturation voltage is acceptable
BC847AW-7-F, BC847BW-TP, or BC847CWT1G for alternative manufacturer sourcing

Frequently Asked Questions (FAQ)

Q: Can BC847CW,135 directly replace BC847CW/SNF in automotive applications?

A: BC847CW,135 is electrically equivalent but lacks documented automotive grade and AEC-Q101 qualification. For automotive applications, use BC847CW-QF, BC847CW-QX, or BC847CW/DG/B4X instead.

Q: What is the difference between BC847CW and BC850CW series?

A: Both series share identical maximum ratings for collector current (100 mA), breakdown voltage (45 V), and transition frequency (100 MHz). The primary difference is Vce saturation: BC847CW saturates at 400 mV maximum, while BC850CW saturates at 600 mV maximum. BC847CW is preferred for applications requiring lower saturation voltage and faster switching.

Q: Are the different packaging codes (,115 vs. ,135) functionally different?

A: No. The packaging codes indicate distribution format: ,115 denotes Cut Tape & Digi-Reel packaging, while ,135 denotes Tape & Reel packaging. Electrical specifications are identical. Selection depends on procurement and assembly requirements.

Q: Can BC847AW-7-F (Diodes Incorporated) replace BC847CW/SNF?

A: BC847AW-7-F is functionally compatible with identical current, voltage, and power ratings. However, it exhibits lower DC current gain (110 vs. 420 minimum) and higher transition frequency (300 MHz vs. 100 MHz). It is suitable for general-purpose applications but not recommended for automotive use due to lack of AEC-Q101 qualification.

Q: What is the impact of using BC850CW instead of BC847CW?

A: BC850CW exhibits 600 mV saturation voltage compared to BC847CW's 400 mV. This results in higher power dissipation during saturation. BC850CW is acceptable for applications where saturation voltage variation is tolerable. For precision switching applications requiring minimal saturation voltage, BC847CW is preferred.

Q: Is BC847CWT1G (onsemi) suitable for high-power applications?

A: BC847CWT1G has a maximum power dissipation of 150 mW, compared to 200 mW for BC847CW/SNF. It is suitable for applications within the 150 mW limit but not recommended for designs requiring the full 200 mW capability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant, matching the compliance status of BC847CW/SNF.

Q: What is the operating temperature range difference between manufacturers?

A: BC847CW/SNF and onsemi BC847CWT1G specify 150°C maximum junction temperature. Diodes Incorporated BC847AW-7-F and Micro Commercial Co BC847BW-TP specify extended ranges of -65°C to 150°C. Extended temperature ranges provide additional design margin but do not affect room-temperature operation.

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