BC847A/SNR Equivalent & Substitute Parts

Part Overview

The BC847A/SNR is a small-signal NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose 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 classified as obsolete, which necessitates identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters. Equivalent parts are available from multiple manufacturers and packaging configurations, ensuring design continuity for applications requiring this transistor type.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	45	V
Current - Collector (Ic) (Max)	100	mA
Vce Saturation (Max) @ Ib, Ic	400 mV @ 5 mA, 100 mA	—
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 2 mA, 5 V	—
Power - Max	250	mW
Frequency - Transition	100	MHz
Operating Temperature (TJ)	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC847A/SNR is determined by strict equivalence across the following critical parameters: transistor type (NPN), maximum collector-emitter breakdown voltage (45 V), maximum collector current (100 mA), DC current gain minimum specification (110 @ 2 mA, 5 V), maximum power dissipation (250 mW), transition frequency (100 MHz), surface mount packaging (TO-236-3/SOT-23-3), and automotive-grade qualification (AEC-Q101). Parts are classified into two substitution categories:

Direct Manufacturer Equivalents: Parts manufactured by Nexperia USA Inc. or NXP Semiconductors with identical electrical specifications and packaging designations. These include BC847A,215, BC847,215, BC847,235, BC847-QR, BC847-QVL, BC847A,235, BC847A-QR, and BC847A-QVL. Differences exist only in packaging format (Tape & Reel, Cut Tape, Bulk) and product status (Active vs. Obsolete).

Similar Manufacturer Alternatives: Parts from alternative manufacturers (Diodes Incorporated, Micro Commercial Co) that maintain core electrical parameters but may exhibit variations in secondary specifications such as Vce saturation voltage, power dissipation, transition frequency, or operating temperature range. These include BC847A-7-F and BC847A-TP.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) [mA]	Vce Breakdown (Max) [V]	Vce Sat (Max) [mV]	hFE (Min)	Power (Max) [mW]	Frequency [MHz]	Package	Packaging Type
BC847A/SNR	Nexperia USA Inc.	Obsolete	100	45	400	110	250	100	TO-236AB	—
BC847A,215	Nexperia USA Inc.	Active	100	45	400	110	250	100	TO-236AB	Tape & Reel
BC847,215	Nexperia USA Inc.	Active	100	45	400	110	250	100	TO-236AB	Cut Tape & Digi-Reel
BC847,235	NXP Semiconductors	Active	100	45	400	110	250	100	TO-236AB	Bulk
BC847-QR	Nexperia USA Inc.	Active	100	45	400	110	250	100	TO-236AB	Tape & Reel
BC847-QVL	Nexperia USA Inc.	Active	100	45	400	110	250	100	TO-236AB	Tape & Reel
BC847A,235	NXP USA Inc.	Active	100	45	400	110	250	100	SOT-23	Bulk
BC847A-QR	Nexperia USA Inc.	Active	100	45	400	110	250	100	TO-236AB	Tape & Reel
BC847A-QVL	Nexperia USA Inc.	Active	100	45	400	110	250	100	TO-236AB	Tape & Reel
BC847A-7-F	Diodes Incorporated	Active	100	45	600	110	300	300	SOT-23-3	Tape & Reel
BC847A-TP	Micro Commercial Co	Active	100	45	500	110	225	100	SOT-23	Tape & Reel

Engineering Selection Recommendations

Direct Equivalents (Recommended for Drop-In Replacement):

Parts BC847A,215, BC847,215, BC847,235, BC847-QR, BC847-QVL, BC847A,235, BC847A-QR, and BC847A-QVL are direct electrical and functional equivalents to the BC847A/SNR. All maintain identical core specifications: 45 V breakdown voltage, 100 mA collector current, 400 mV Vce saturation, 110 minimum hFE, 250 mW power rating, and 100 MHz transition frequency. All are manufactured by Nexperia USA Inc. or NXP Semiconductors, carry AEC-Q101 automotive qualification, and are ROHS3 compliant. These parts differ only in packaging format (Tape & Reel, Cut Tape, Bulk) and product status (all Active). Selection among these equivalents should be based on procurement packaging requirements and inventory availability.

Alternative Manufacturers (Conditional Substitution):

BC847A-7-F (Diodes Incorporated) and BC847A-TP (Micro Commercial Co) are functionally similar but exhibit parameter variations. BC847A-7-F provides enhanced performance with 300 MHz transition frequency and 300 mW power rating, but specifies 600 mV Vce saturation (versus 400 mV). BC847A-TP maintains 100 MHz transition frequency but specifies 500 mV Vce saturation and 225 mW power rating. These alternatives are suitable for applications where the specified parameter variations do not impact circuit performance. Both are Active products with AEC-Q101 qualification and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can BC847A,215 be used as a direct replacement for BC847A/SNR?

A: Yes. BC847A,215 is a direct electrical equivalent manufactured by Nexperia USA Inc. with identical specifications across all critical parameters: 45 V breakdown voltage, 100 mA collector current, 400 mV Vce saturation, 110 minimum hFE, 250 mW power, and 100 MHz transition frequency. The primary difference is packaging format (Tape & Reel versus the original format) and active product status. Verify that your assembly process accommodates Tape & Reel packaging.

Q: What is the difference between BC847,215 and BC847A,215?

A: Both are manufactured by Nexperia USA Inc. and share identical electrical specifications. The designation difference reflects internal Nexperia product coding. Both are suitable equivalents for the BC847A/SNR. Selection should be based on packaging availability and procurement requirements.

Q: Are BC847A-7-F and BC847A-TP suitable replacements?

A: BC847A-7-F and BC847A-TP are functionally similar but not direct equivalents. BC847A-7-F exhibits higher Vce saturation (600 mV versus 400 mV) and enhanced transition frequency (300 MHz versus 100 MHz). BC847A-TP exhibits higher Vce saturation (500 mV versus 400 mV) and lower power rating (225 mW versus 250 mW). These parts are suitable only if circuit design tolerates the specified parameter variations. Verify saturation voltage and power dissipation requirements before substitution.

Q: Do all substitute parts maintain automotive qualification?

A: Yes. All listed substitute parts carry AEC-Q101 automotive qualification and are ROHS3 compliant, matching the original BC847A/SNR specifications.

Q: What packaging options are available for equivalent parts?

A: Equivalent parts are available in three packaging formats: Tape & Reel (BC847A,215, BC847-QR, BC847-QVL, BC847A-QR, BC847A-QVL, BC847A-7-F, BC847A-TP), Cut Tape & Digi-Reel (BC847,215), and Bulk (BC847,235, BC847A,235). All maintain the same TO-236-3/SOT-23-3 surface mount package footprint. Verify your assembly process requirements before selecting packaging format.

Q: Is the BC847A/SNR still available for procurement?

A: The BC847A/SNR is classified as obsolete. Active equivalent parts are available from Nexperia USA Inc., NXP Semiconductors, Diodes Incorporated, and Micro Commercial Co. Direct equivalents from Nexperia and NXP are recommended for new designs and ongoing production.

Q: Can I mix different substitute parts in the same assembly?

A: Yes, provided all selected parts meet the circuit's electrical requirements. All listed direct equivalents (BC847A,215, BC847,215, BC847,235, BC847-QR, BC847-QVL, BC847A,235, BC847A-QR, BC847A-QVL) are interchangeable. Alternative manufacturer parts (BC847A-7-F, BC847A-TP) may be mixed only if their parameter variations are acceptable for the specific application.

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