BC847BW/SNF Equivalent & Substitute Parts

Part Overview

The BC847BW/SNF is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for small-signal switching and amplification applications. This device operates at a maximum collector voltage of 45 V with a collector current rating of 100 mA 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 with ROHS3 compliance.

The BC847BW/SNF is classified as obsolete. Equivalent and substitute parts are available from the same manufacturer and alternative suppliers, offering identical or enhanced electrical characteristics while maintaining compatibility with existing designs.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the BC847BW/SNF is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type (NPN)
Collector current rating (100 mA minimum)
Collector-Emitter breakdown voltage (45 V minimum)
DC current gain (hFE ≥ 200 @ 2 mA, 5 V)
Power dissipation (200 mW minimum)
Transition frequency (100 MHz minimum)
Operating temperature range (150°C maximum junction temperature)

Mechanical Compatibility Criteria:

Package type (SC-70 or SOT-323)
Surface-mount configuration
Moisture sensitivity level (MSL 1 or equivalent)

Compliance Criteria:

Automotive grade qualification (AEC-Q101)
ROHS3 compliance
REACH unaffected status

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents (Nexperia): Parts with identical electrical specifications and automotive qualification, differing only in packaging format (Tape & Reel) or product status (Active vs. Obsolete).

Parametric Equivalents (Nexperia): Parts meeting or exceeding all electrical requirements with identical package specifications and automotive qualification. These include BC847BW variants and BC850BW series, which differ in Vce saturation characteristics but maintain functional compatibility.

Similar Parts (Alternative Manufacturers): Parts from Diodes Incorporated and Micro Commercial Co that meet core electrical and mechanical requirements but may have variations in transition frequency, collector cutoff current, or operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce Breakdown (Max) V	Vce Sat @ 5mA, 100mA mV	hFE (Min) @ 2mA, 5V	Fт MHz	Package	AEC-Q101	ROHS3
BC847BW/SNF	Nexperia USA Inc.	Obsolete	100	45	400	200	100	SC-70, SOT-323	Yes	Yes
BC847BW,135	Nexperia USA Inc.	Active	100	45	400	200	100	SC-70, SOT-323	No	Yes
BC847BW,115	NXP USA Inc.	Active	100	45	400	200	100	SC-70, SOT-323	Yes	No
BC847BW-QF	Nexperia USA Inc.	Active	100	45	400	200	100	SC-70, SOT-323	Yes	Yes
BC847BW-QX	Nexperia USA Inc.	Active	100	45	400	200	100	SC-70, SOT-323	Yes	Yes
BC850BW,115	Nexperia USA Inc.	Active	100	45	600	200	100	SC-70, SOT-323	Yes	Yes
BC850BW,135	Nexperia USA Inc.	Active	100	45	600	200	100	SC-70, SOT-323	Yes	Yes
BC857BW-QF	Nexperia USA Inc.	Active	100	45	400	200	100	SC-70, SOT-323	Yes	Yes
BC857BW-QX	Nexperia USA Inc.	Active	100	45	400	200	100	SC-70, SOT-323	Yes	Yes
BC847BW-7-F	Diodes Incorporated	Active	100	45	600	200	300	SC-70, SOT-323	No	Yes
BC847BW-TP	Micro Commercial Co	Active	100	45	600	200	100	SC-70, SOT-323	No	Yes

Engineering Selection Recommendations

For Automotive Applications with AEC-Q101 Requirement:

Select BC847BW-QF or BC847BW-QX from Nexperia USA Inc. Both parts maintain identical electrical specifications to the BC847BW/SNF, are qualified to AEC-Q101, and are ROHS3 compliant. These parts are in active production status and provide direct functional replacement with enhanced supply availability.

BC850BW,115 and BC850BW,135 are alternative selections when higher Vce saturation voltage (600 mV vs. 400 mV) is acceptable. Both maintain AEC-Q101 qualification and ROHS3 compliance.

For Non-Automotive Applications:

BC847BW-7-F from Diodes Incorporated offers enhanced transition frequency (300 MHz vs. 100 MHz) and is suitable for applications requiring higher-speed performance. This part is ROHS3 compliant but does not carry AEC-Q101 qualification.

BC847BW-TP from Micro Commercial Co provides equivalent electrical performance with 100 MHz transition frequency and is ROHS3 compliant. AEC-Q101 qualification is not provided.

For Supply Chain Continuity:

BC847BW,135 is available in high inventory (3,677 pieces) and provides direct electrical equivalence. However, AEC-Q101 qualification is not specified for this variant.

All recommended substitutes maintain the SC-70/SOT-323 surface-mount package format, 100 mA collector current rating, 45 V breakdown voltage, and 200 mW power dissipation of the original BC847BW/SNF.

Frequently Asked Questions (FAQ)

Q: Can BC847BW-QF replace BC847BW/SNF in automotive applications?

A: Yes. BC847BW-QF meets all electrical specifications of BC847BW/SNF (100 mA Ic, 45 V Vce breakdown, 400 mV saturation voltage, 200 hFE minimum, 100 MHz transition frequency) and is qualified to AEC-Q101 with ROHS3 compliance. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel).

Q: What is the difference between BC847BW and BC850BW series?

A: Both series share identical collector current (100 mA), breakdown voltage (45 V), DC current gain (200 minimum), and transition frequency (100 MHz). The primary difference is Vce saturation voltage: BC847BW saturates at 400 mV (5 mA, 100 mA), while BC850BW saturates at 600 mV. BC850BW is suitable for applications where higher saturation voltage is acceptable or beneficial.

Q: Are BC857BW-QF and BC857BW-QX suitable replacements?

A: Yes. BC857BW-QF and BC857BW-QX are parametric equivalents with identical electrical specifications to BC847BW/SNF. Both are AEC-Q101 qualified and ROHS3 compliant. These parts are in active production and provide direct functional replacement.

Q: Can I use BC847BW-7-F from Diodes Incorporated as a substitute?

A: BC847BW-7-F meets core electrical requirements (100 mA Ic, 45 V breakdown, 200 hFE minimum) and is ROHS3 compliant. However, it offers enhanced transition frequency (300 MHz vs. 100 MHz) and higher Vce saturation (600 mV). This part is not AEC-Q101 qualified. Use only in non-automotive applications or where automotive qualification is not required.

Q: What is the significance of the packaging designations (,135 vs. ,115 vs. -QF)?

A: These designations indicate different packaging and distribution formats from Nexperia. The ,135 and ,115 suffixes denote specific tape and reel configurations or internal product codes. The -QF suffix indicates a qualified automotive variant. All maintain identical electrical specifications and SC-70/SOT-323 package dimensions.

Q: Is MSL 1 (Unlimited) moisture sensitivity important for substitution?

A: Yes. MSL 1 indicates unlimited shelf life without moisture bake-out requirements. All recommended substitutes maintain MSL 1 rating, ensuring compatibility with standard storage and handling procedures.

Q: Can BC847BW-TP from Micro Commercial Co be used in automotive designs?

A: BC847BW-TP meets electrical specifications but is not AEC-Q101 qualified. It is suitable for non-automotive applications. For automotive designs requiring AEC-Q101 qualification, select BC847BW-QF, BC847BW-QX, BC850BW,115, or BC850BW,135 from Nexperia.

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

A: BC847BW/SNF specifies 150°C maximum junction temperature. BC847BW-7-F from Diodes Incorporated specifies -65°C to 150°C operating range. BC847BW-TP from Micro Commercial Co also specifies -65°C to 150°C. All parts support the 150°C maximum thermal requirement of the original device.

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