BC847AW-QF Equivalent & Substitute Parts

Part Overview

The BC847AW-QF is an NPN small-signal bipolar junction transistor manufactured by Nexperia USA Inc. in SOT-323 surface mount packaging. This device is classified as an active product and is AEC-Q101 automotive qualified. The BC847AW-QF serves general-purpose switching and amplification applications in automotive and industrial electronics requiring compact form factors and reliable performance across extended temperature ranges.

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and component availability across manufacturing environments. Substitution is based strictly on electrical performance parameters, mechanical compatibility, and regulatory compliance certifications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Ic) Maximum	100	mA
Collector-Emitter Breakdown Voltage (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	400 mV @ 5 mA, 100 mA	—
Collector Cutoff Current (ICBO) Maximum	15	nA
DC Current Gain (hFE) Minimum @ Ic, Vce	110 @ 2 mA, 5 V	—
Power Dissipation Maximum	200	mW
Transition Frequency	100	MHz
Operating Temperature Maximum	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

Substitution of the BC847AW-QF is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Transistor type: NPN configuration
Collector current rating: 100 mA maximum
Collector-emitter breakdown voltage: 45 V maximum
Power dissipation: 200 mW maximum
Transition frequency: 100 MHz minimum
Operating temperature: 150°C maximum junction temperature
DC current gain (hFE): 110 minimum at specified bias conditions

Mechanical Compatibility Criteria:

Package type: SOT-323 (SC-70)
Mounting: Surface mount
Pin configuration: Identical to BC847AW-QF

Regulatory Compliance Criteria:

RoHS3 compliance required
REACH unaffected status
Automotive grade and AEC-Q101 qualification preferred for automotive applications

Substitute parts are classified into two categories:

Parametric Equivalents: Parts meeting all electrical specifications and mechanical requirements with identical or superior performance characteristics. These include BC847AW,115; BC847AW,135; BC847W,115; and BC847W,135.

Similar Parts: Parts meeting core electrical specifications and mechanical requirements but with variations in specific parameters such as Vce saturation voltage, collector cutoff current, or DC current gain. These include BC847AW RFG, BC847BW RFG, BC847CW RFG, BC850AW RFG, BC850BW RFG, and BC850CW RFG.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Vce Sat (Max) mV	hFE (Min)	Power mW	Freq MHz	Temp °C	Package	AEC-Q101
BC847AW-QF	Nexperia USA Inc.	100	45	400	110	200	100	150	SOT-323	Yes
BC847AW,115	NXP Semiconductors	100	45	400	110	200	100	150	SOT-323	Yes
BC847AW,135	Nexperia USA Inc.	100	45	400	110	200	100	150	SOT-323	No
BC847W,115	Nexperia USA Inc.	100	45	400	110	200	100	150	SOT-323	No
BC847W,135	NXP USA Inc.	100	45	400	110	200	100	150	SOT-323	Yes
BC847AW RFG	Taiwan Semiconductor Corporation	100	45	600	110	200	100	150	SOT-323	No
BC847BW RFG	Taiwan Semiconductor Corporation	100	45	600	200	200	100	150	SOT-323	No
BC847CW RFG	Taiwan Semiconductor Corporation	100	45	600	420	200	100	150	SOT-323	No
BC850AW RFG	Taiwan Semiconductor Corporation	100	45	600	110	200	100	150	SOT-323	No
BC850BW RFG	Taiwan Semiconductor Corporation	100	45	600	200	200	100	150	SOT-323	No
BC850CW RFG	Taiwan Semiconductor Corporation	100	45	600	420	200	100	150	SOT-323	No

Engineering Selection Recommendations

For Automotive Applications with AEC-Q101 Requirement:

BC847AW,115 (NXP Semiconductors) is the primary parametric equivalent. This part maintains identical electrical specifications to the BC847AW-QF, including Vce saturation of 400 mV at rated conditions, and carries AEC-Q101 automotive qualification. Packaging is supplied in bulk format.

BC847W,135 (NXP USA Inc.) is an alternative parametric equivalent with AEC-Q101 qualification and identical electrical performance. This part is supplied in bulk packaging.

For General-Purpose Applications Without Automotive Qualification Requirement:

BC847AW,135 (Nexperia USA Inc.) and BC847W,115 (Nexperia USA Inc.) are parametric equivalents with identical electrical specifications. These parts are supplied in tape and reel format and are suitable for non-automotive applications.

For Applications Tolerant of Higher Vce Saturation Voltage:

BC847AW RFG, BC847BW RFG, BC847CW RFG, BC850AW RFG, BC850BW RFG, and BC850CW RFG (Taiwan Semiconductor Corporation) are similar parts with Vce saturation of 600 mV at rated conditions. These parts differ from the main part in saturation voltage and collector cutoff current specifications. Selection among these variants depends on DC current gain requirements: BC847AW RFG and BC850AW RFG provide hFE of 110; BC847BW RFG and BC850BW RFG provide hFE of 200; BC847CW RFG and BC850CW RFG provide hFE of 420.

Packaging Considerations:

The BC847AW-QF is supplied in tape and reel format. Equivalent parts are available in both tape and reel and bulk packaging formats. Bulk packaging variants (BC847AW,115 and BC847W,135) may require reeling for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can BC847AW,115 be used as a direct replacement for BC847AW-QF?

A: Yes. BC847AW,115 is a parametric equivalent with identical electrical specifications across all critical parameters: collector current, breakdown voltage, saturation voltage, current gain, power dissipation, and transition frequency. Both parts are AEC-Q101 qualified for automotive applications. The primary difference is packaging format: BC847AW-QF is supplied in tape and reel, while BC847AW,115 is supplied in bulk.

Q: What is the difference between BC847AW RFG and BC847AW-QF?

A: BC847AW RFG differs in two electrical parameters. Vce saturation is 600 mV at rated conditions compared to 400 mV for BC847AW-QF. Collector cutoff current (ICBO) is 100 nA compared to 15 nA. These differences indicate different manufacturing processes and may affect circuit performance in saturation-mode switching applications. BC847AW RFG is not AEC-Q101 qualified.

Q: Are the BC847 and BC850 series interchangeable?

A: BC847 and BC850 series parts share identical electrical specifications for collector current, breakdown voltage, power dissipation, and transition frequency. However, they differ in base product designation. Within the Taiwan Semiconductor Corporation RFG variants, BC850AW RFG, BC850BW RFG, and BC850CW RFG are available with the same Vce saturation and current gain characteristics as their BC847 counterparts. Substitution is based on specific electrical requirements rather than series designation.

Q: What does the suffix designation (,115 or ,135) indicate?

A: The suffix designations (,115 and ,135) represent different packaging or distribution formats from NXP Semiconductors and Nexperia USA Inc. Both BC847AW,115 and BC847AW,135 maintain identical electrical specifications. The designation does not affect electrical performance or compatibility in circuit applications.

Q: Can I use BC847CW RFG in place of BC847AW-QF if my circuit requires higher current gain?

A: BC847CW RFG provides DC current gain (hFE) of 420 at specified bias conditions compared to 110 for BC847AW-QF. While the higher gain may be suitable for certain amplification circuits, the elevated Vce saturation voltage (600 mV versus 400 mV) affects switching performance. Selection depends on specific circuit requirements for gain and saturation characteristics. BC847CW RFG is not AEC-Q101 qualified.

Q: Is RoHS3 compliance maintained across all substitute parts?

A: RoHS3 compliance is confirmed for BC847AW-QF, BC847AW,135, and BC847W,115. The Taiwan Semiconductor Corporation RFG variants (BC847AW RFG, BC847BW RFG, BC847CW RFG, BC850AW RFG, BC850BW RFG, BC850CW RFG) are also RoHS3 compliant. All parts listed are REACH unaffected.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: Parametric equivalent parts BC847AW,115, BC847AW,135, BC847W,115, and BC847W,135 are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The main part BC847AW-QF does not specify MSL in the provided data. Taiwan Semiconductor Corporation RFG variants are rated MSL 1 (Unlimited).

Q: Are all substitute parts suitable for automotive applications?

A: AEC-Q101 automotive qualification is confirmed for BC847AW-QF, BC847AW,115, and BC847W,135. Other parametric equivalents (BC847AW,135 and BC847W,115) and all Taiwan Semiconductor Corporation RFG variants do not carry AEC-Q101 qualification in the provided specifications. For automotive applications requiring qualification, selection is limited to AEC-Q101 qualified parts.

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