BC847AW-TP Equivalent & Substitute Parts

Part Overview

The BC847AW-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This surface mount device operates at 45 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and transition frequency of 100 MHz. The part is active and in production, with 3748 units currently in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and packaging specifications to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector-Emitter Breakdown Voltage (Max)	45	V
Collector Current (Max)	100	mA
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA	—
Collector Cutoff Current (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 2 mA, 5 V	—
Transition Frequency	100	MHz
Operating Temperature Range	−65 to 150	°C
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BC847AW-TP are selected based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

Transistor type: NPN
Collector-emitter breakdown voltage: 45 V
Maximum collector current: 100 mA
Vce saturation: 600 mV @ 5 mA, 100 mA
Collector cutoff current: 100 nA (ICBO)
Transition frequency: 100 MHz

Mechanical Compatibility Criteria:

Package: SC-70 or SOT-323
Mounting type: Surface Mount
Tape & Reel (TR) packaging format

Compliance Criteria:

RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)
Active product status

Substitute parts are grouped into two categories: direct equivalents from Taiwan Semiconductor Corporation (BC847 and BC850 series variants) and automotive-grade alternatives from onsemi (SBC847 series). All substitutes maintain identical electrical performance within the specified parameters. Variations in DC current gain (hFE) and maximum power dissipation are noted but do not affect substitutability for applications within the specified operating conditions.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	hFE (Min) @ 2mA, 5V	Vce Sat (Max) mV	Icbo (Max) nA	Freq MHz	Temp Range °C	Power (Max) mW	Package
BC847AW-TP	Micro Commercial Co	100	45	110	600	100	100	−65 to 150	—	SOT-323
BC847AW RFG	Taiwan Semiconductor	100	45	110	600	100	100	−55 to 150	200	SOT-323
BC847BW RFG	Taiwan Semiconductor	100	45	200	600	100	100	−55 to 150	200	SOT-323
BC847CW RFG	Taiwan Semiconductor	100	45	420	600	100	100	−55 to 150	200	SOT-323
BC850AW RFG	Taiwan Semiconductor	100	45	110	600	100	100	−55 to 150	200	SOT-323
BC850BW RFG	Taiwan Semiconductor	100	45	200	600	100	100	−55 to 150	200	SOT-323
BC850CW RFG	Taiwan Semiconductor	100	45	420	600	100	100	−55 to 150	200	SOT-323
SBC847CWT1G	onsemi	100	45	420	600	15	100	−55 to 150	150	SOT-323
SBC847CWT3G	onsemi	100	45	420	600	15	100	−55 to 150	150	SOT-323

Engineering Selection Recommendations

Direct Equivalents (Taiwan Semiconductor Corporation):

The BC847AW RFG, BC847BW RFG, and BC847CW RFG from Taiwan Semiconductor Corporation are direct functional equivalents to the BC847AW-TP. These parts maintain identical electrical specifications across all critical parameters: 45 V breakdown voltage, 100 mA collector current, 600 mV saturation voltage, and 100 MHz transition frequency. The primary difference is the DC current gain (hFE) classification, where the "A" variant matches the original part at 110 minimum, the "B" variant provides 200 minimum, and the "C" variant provides 420 minimum. All three variants are RoHS3 compliant and carry unlimited moisture sensitivity rating. These parts are suitable for direct substitution in applications where the specified hFE range is acceptable.

BC850 Series Alternatives (Taiwan Semiconductor Corporation):

The BC850AW RFG, BC850BW RFG, and BC850CW RFG represent an alternative product line from Taiwan Semiconductor Corporation with identical electrical performance to the corresponding BC847 variants. The BC850 series shares all critical electrical parameters with the BC847 series, including voltage, current, saturation characteristics, and frequency response. These parts are interchangeable with their BC847 counterparts and are available in equivalent hFE classifications (A, B, and C grades). Selection between BC847 and BC850 series is based on design preference and supply availability, as both families meet the same electrical requirements.

Automotive-Grade Alternatives (onsemi):

The SBC847CWT1G and SBC847CWT3G from onsemi are automotive-grade equivalents qualified to AEC-Q101 standard. These parts maintain the same electrical specifications as the BC847CW RFG and BC850CW RFG, with hFE minimum of 420 at 2 mA and 5 V. The onsemi variants feature lower collector cutoff current (15 nA versus 100 nA) and reduced maximum power dissipation (150 mW versus 200 mW). These parts are suitable for applications requiring automotive qualification and are fully RoHS3 compliant with unlimited moisture sensitivity rating.

Selection Basis:

All substitute parts listed are active products with confirmed inventory availability. Selection should be based on: (1) required DC current gain classification (A, B, or C grade); (2) automotive qualification requirement (onsemi SBC847 series if required); (3) power dissipation margin (Taiwan Semiconductor 200 mW versus onsemi 150 mW); and (4) supply chain availability. All parts are compatible with existing PCB layouts designed for SOT-323 surface mount packages.

Frequently Asked Questions (FAQ)

Q: Can BC847BW RFG be used as a direct replacement for BC847AW-TP?

A: Yes. The BC847BW RFG is electrically equivalent to the BC847AW-TP across all critical parameters: 45 V breakdown voltage, 100 mA collector current, 600 mV saturation voltage, and 100 MHz transition frequency. The primary difference is the DC current gain (hFE) minimum specification of 200 versus 110. This higher gain does not prevent substitution; it indicates tighter gain classification. Applications designed for the BC847AW-TP will function with the BC847BW RFG provided the circuit design does not depend on the lower gain specification.

Q: What is the difference between BC847 and BC850 series transistors?

A: The BC847 and BC850 series from Taiwan Semiconductor Corporation share identical electrical specifications across all critical parameters. Both families are available in A, B, and C gain grades. The series designation reflects different product lines within the manufacturer's portfolio but does not indicate functional differences. Selection between series is based on design preference and supply availability.

Q: Are onsemi SBC847 parts suitable for non-automotive applications?

A: Yes. The onsemi SBC847CWT1G and SBC847CWT3G are automotive-qualified parts that exceed the electrical requirements of general-purpose applications. These parts maintain the same electrical performance as the Taiwan Semiconductor equivalents and are fully RoHS3 compliant. Automotive qualification does not restrict use in non-automotive designs; it indicates additional quality and reliability testing has been performed.

Q: What is the significance of the hFE classification (A, B, C grades)?

A: The hFE classification indicates the DC current gain minimum specification at 2 mA collector current and 5 V collector-emitter voltage. The "A" grade specifies 110 minimum, "B" grade specifies 200 minimum, and "C" grade specifies 420 minimum. Higher gain grades provide tighter specifications and may reduce circuit design margin. Selection should match the original part specification unless circuit analysis confirms compatibility with alternative gain grades.

Q: Can SBC847CWT1G and SBC847CWT3G be used interchangeably?

A: Yes. The SBC847CWT1G and SBC847CWT3G are identical in electrical specification and performance. Both parts are automotive-qualified to AEC-Q101 and carry the same hFE minimum of 420. The designation difference reflects manufacturing lot or date code tracking but does not indicate functional variation. These parts are interchangeable for all applications.

Q: What is the operating temperature difference between BC847AW-TP and substitute parts?

A: The BC847AW-TP operates from −65°C to 150°C junction temperature. All Taiwan Semiconductor and onsemi substitute parts operate from −55°C to 150°C. The BC847AW-TP provides extended low-temperature operation to −65°C. For applications requiring operation below −55°C, the original BC847AW-TP specification must be maintained. For applications within the −55°C to 150°C range, all substitute parts are suitable.

Q: Are all listed substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed—BC847AW RFG, BC847BW RFG, BC847CW RFG, BC850AW RFG, BC850BW RFG, BC850CW RFG, SBC847CWT1G, and SBC847CWT3G—are RoHS3 compliant. All parts carry unlimited moisture sensitivity level (MSL 1) and are REACH unaffected.

Q: What is the difference in power dissipation between Taiwan Semiconductor and onsemi parts?

A: Taiwan Semiconductor BC847 and BC850 series parts specify 200 mW maximum power dissipation. onsemi SBC847 series parts specify 150 mW maximum power dissipation. For applications operating near maximum power limits, the Taiwan Semiconductor variants provide additional margin. For typical applications, both specifications are adequate.

Q: Is the SOT-323 package identical across all substitute parts?

A: Yes. All substitute parts use the SC-70 or SOT-323 surface mount package with identical pin configuration and footprint. All parts are compatible with existing PCB layouts designed for the BC847AW-TP SOT-323 package. No PCB redesign is required for substitution.

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