BC848BW Equivalent & Substitute Parts

Part Overview

The BC848BW is an NPN bipolar junction transistor manufactured by Taiwan Semiconductor Corporation, designed for small-signal switching and amplification applications. This surface-mount device operates at 30V maximum collector-emitter breakdown voltage with a maximum collector current of 100mA and delivers 200mW power dissipation in a compact SOT-323 package. The part is currently in active production status with 74,350 units in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements across multiple manufacturers including Rohm Semiconductor, Fairchild Semiconductor, NXP USA Inc., Nexperia USA Inc., and onsemi.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	30	V
Current - Collector (Ic) (Max)	100	mA
Power - Max	200	mW
Frequency - Transition	100	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 2mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	600mV @ 5mA, 100mA	—
Current - Collector Cutoff (Max)	15	nA
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BC848BW is determined by strict electrical and mechanical parameter matching within the NPN bipolar transistor category. The primary substitution criteria are:

Critical Parameters for Substitution:

Transistor Type: NPN (mandatory match)
Voltage - Collector Emitter Breakdown (Max): 30V minimum required
Current - Collector (Ic) (Max): 100mA minimum required
Power - Max: 200mW minimum required
Package / Case: SC-70 or SOT-323 (mandatory match for mechanical compatibility)
Mounting Type: Surface Mount (mandatory match)

Secondary Parameters Influencing Substitution:

Frequency - Transition: 100MHz or higher acceptable
DC Current Gain (hFE): 200 or higher acceptable
Vce Saturation: 600mV or lower acceptable
Current - Collector Cutoff (Max): 15nA or lower acceptable
Operating Temperature Range: -55°C to 150°C or subset thereof acceptable

Substitute parts are grouped into two categories: Direct Equivalents (matching all critical parameters) and Parametric Equivalents (exceeding minimum specifications in one or more secondary parameters while maintaining all critical requirements).

Parameter Comparison

Parameter	BC848BW (Main)	BC848BWT106	BC848CWT1G	BC849CW,115	BC849BW,115	BC849BW,135	NSVBC848BWT1G	PMSS3904,115
Manufacturer	Taiwan Semiconductor	Rohm Semiconductor	Fairchild Semiconductor	NXP USA Inc.	NXP USA Inc.	Nexperia USA Inc.	onsemi	Nexperia USA Inc.
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	30V	30V	30V	30V	30V	30V	30V	40V
Current - Collector (Ic) (Max)	100mA	100mA	100mA	100mA	100mA	100mA	100mA	100mA
Power - Max	200mW	200mW	150mW	200mW	200mW	200mW	200mW	200mW
Frequency - Transition	100MHz	200MHz	100MHz	100MHz	100MHz	100MHz	100MHz	180MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 2mA, 5V	200 @ 2mA, 5V	420 @ 2mA, 5V	420 @ 2mA, 5V	200 @ 2mA, 5V	200 @ 2mA, 5V	200 @ 2mA, 5V	100 @ 10mA, 1V
Vce Saturation (Max) @ Ib, Ic	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	600mV @ 5mA, 100mA	300mV @ 5mA, 50mA
Current - Collector Cutoff (Max)	15nA	100nA	15nA	15nA	15nA	15nA	15nA	50nA
Package / Case	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature Range	-55 to 150°C	150°C	-55 to 150°C	150°C	150°C	150°C	-55 to 150°C	150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade / AEC-Q101	Not specified	Not specified	Not specified	Yes	Yes	Yes	Not specified	Not specified

Engineering Selection Recommendations

Direct Equivalents (Full Parameter Match):

BC848BWT106 (Rohm Semiconductor) and NSVBC848BWT1G (onsemi) are direct electrical equivalents to the BC848BW. Both devices match all critical electrical parameters and package specifications. BC848BWT106 offers enhanced frequency performance at 200MHz. NSVBC848BWT1G maintains the full operating temperature range of -55°C to 150°C, matching the original specification. Both are ROHS3 compliant and suitable for direct substitution in existing designs.

Parametric Equivalents with Enhanced Specifications:

BC849CW,115 (NXP USA Inc.) and BC849BW,115 (NXP USA Inc.) and BC849BW,135 (Nexperia USA Inc.) provide parametric equivalence with automotive-grade qualification (AEC-Q101). These parts maintain all critical electrical parameters while offering automotive reliability certification. BC849CW,115 and BC849BW,115 are functionally identical with identical electrical specifications; the difference is in packaging format (Bulk vs. Tape & Reel). BC849BW,135 is supplied in Tape & Reel format with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Enhanced Performance Alternative:

BC848CWT1G (Fairchild Semiconductor) provides identical electrical performance to the BC848BW with the exception of reduced maximum power dissipation (150mW versus 200mW) and higher DC current gain (420 versus 200 at 2mA, 5V). This part is suitable for applications where higher current gain is beneficial and power dissipation does not exceed 150mW.

Higher Voltage Alternative:

PMSS3904,115 (Nexperia USA Inc.) operates at 40V maximum collector-emitter breakdown voltage, providing 33% higher voltage headroom than the BC848BW. This part is suitable for applications requiring higher voltage tolerance while maintaining 100mA collector current and 200mW power dissipation. The part exhibits lower DC current gain (100 at 10mA, 1V) and improved saturation characteristics (300mV at 5mA, 50mA). PMSS3904,115 is ROHS3 compliant with unlimited moisture sensitivity level.

Selection Criteria by Application:

For standard applications requiring direct replacement, select BC848BWT106 or NSVBC848BWT1G. For automotive applications, select BC849CW,115, BC849BW,115, or BC849BW,135. For applications requiring higher voltage operation, select PMSS3904,115. For applications benefiting from higher current gain, select BC848CWT1G.

Frequently Asked Questions (FAQ)

Q: Can BC849BW,115 be used as a direct replacement for BC848BW?

A: Yes. BC849BW,115 is a parametric equivalent with identical electrical specifications: 30V maximum collector-emitter breakdown voltage, 100mA maximum collector current, 200mW power dissipation, 100MHz transition frequency, and 200 minimum DC current gain at 2mA, 5V. Both devices use the SC-70/SOT-323 surface-mount package. The primary difference is automotive-grade qualification (AEC-Q101) on the BC849BW,115.

Q: What is the difference between BC849BW,115 and BC849BW,135?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is in packaging format: BC849BW,115 is supplied in Bulk packaging, while BC849BW,135 is supplied in Tape & Reel (TR) format. Both are ROHS3 compliant with AEC-Q101 automotive qualification and unlimited moisture sensitivity level (MSL 1).

Q: Can PMSS3904,115 replace BC848BW in all applications?

A: PMSS3904,115 is a higher-voltage alternative suitable for applications where 40V maximum collector-emitter breakdown voltage is required. However, it exhibits different electrical characteristics: lower DC current gain (100 at 10mA, 1V versus 200 at 2mA, 5V) and improved saturation characteristics (300mV at 5mA, 50mA versus 600mV at 5mA, 100mA). Substitution requires circuit analysis to confirm compatibility with these parameter differences.

Q: Is BC848CWT1G compatible with BC848BW?

A: BC848CWT1G is electrically compatible for most applications with two exceptions: maximum power dissipation is reduced to 150mW (versus 200mW), and DC current gain is higher at 420 minimum (versus 200 minimum). Applications operating below 150mW power dissipation benefit from the higher current gain. Applications requiring full 200mW dissipation require alternative selection.

Q: What is the advantage of BC848BWT106 over BC848BW?

A: BC848BWT106 provides enhanced frequency performance at 200MHz transition frequency (versus 100MHz on BC848BW), while maintaining all other electrical specifications. This higher frequency capability supports faster switching applications. Both devices are ROHS3 compliant and use identical SC-70/SOT-323 packaging.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for BC848BWT106, BC849BW,135, NSVBC848BWT1G, and PMSS3904,115. ROHS3 status is not specified for BC848CWT1G and BC849CW,115. Verify ROHS3 compliance with the manufacturer for applications requiring regulatory certification.

Q: Can BC848BW be used in automotive applications?

A: BC848BW does not carry automotive-grade qualification. For automotive applications, select BC849CW,115, BC849BW,115, or BC849BW,135, which are all AEC-Q101 qualified.

Q: What is the operating temperature range for each substitute part?

A: BC848BW and BC848CWT1G and NSVBC848BWT1G operate across the full range of -55°C to 150°C. BC848BWT106, BC849CW,115, BC849BW,115, BC849BW,135, and PMSS3904,115 are specified to 150°C maximum. Applications requiring operation below 0°C require selection of parts with -55°C minimum specification.

Q: Are all substitute parts available in the same package?

A: All substitute parts use SC-70 or SOT-323 surface-mount packages, ensuring mechanical compatibility. Packaging format (Tape & Reel, Bulk, Cut Tape & Digi-Reel) differs by supplier but does not affect electrical performance or PCB mounting compatibility.

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