BC849B-TP Equivalent & Substitute Parts

Part Overview

The BC849B-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co in SOT-23 surface mount packaging. This transistor is rated for 30 V collector-emitter breakdown voltage, 100 mA maximum collector current, and 225 mW power dissipation. The device operates across a temperature range of -55°C to 150°C and features a transition frequency of 100 MHz. The BC849B-TP is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are necessary to address supply chain variations, manufacturer availability, packaging preferences, and application-specific performance requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	30	V
Current - Collector (Ic) (Max)	100	mA
Power - Max	225	mW
Frequency - Transition	100	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 2mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	500mV @ 5mA, 100mA	—
Operating Temperature Range	-55 to 150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BC849B-TP is determined by strict equivalence across the following critical parameters: transistor type (NPN), collector-emitter breakdown voltage (30 V maximum), maximum collector current (100 mA), package type (SOT-23 surface mount), and DC current gain minimum specification (200 @ 2mA, 5V). All substitute parts listed maintain these core electrical specifications and physical packaging requirements.

Substitute parts are grouped into two categories based on allowed parameter variations:

Category 1: Parametric Equivalents — Parts with identical electrical specifications and packaging but different manufacturer designations or internal grading. These include BC848B-TP and BC848BHE3-TP from Micro Commercial Co, which share all critical parameters with the BC849B-TP.

Category 2: Direct Manufacturer Equivalents — Parts from alternative manufacturers (Nexperia USA Inc., Diodes Incorporated, onsemi) that meet or exceed the core electrical requirements. These parts may exhibit variations in secondary parameters such as power dissipation (250 mW to 300 mW), transition frequency (100 MHz to 300 MHz), or Vce saturation voltage (500 mV to 600 mV), while maintaining full compatibility with the primary application requirements.

All substitute parts maintain SOT-23-3 (TO-236) surface mount packaging, ROHS3 compliance, and MSL 1 moisture sensitivity rating.

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce(br)max	Power (Max)	Frequency	Vce Sat @ 5mA, 100mA	hFE (Min)	Temp Range	Package	AEC-Q101
BC849B-TP	Micro Commercial Co	100 mA	30 V	225 mW	100 MHz	500mV	200	-55 to 150°C	SOT-23	—
BC848B-TP	Micro Commercial Co	100 mA	30 V	225 mW	100 MHz	500mV	200	-55 to 150°C	SOT-23	—
BC848BHE3-TP	Micro Commercial Co	100 mA	30 V	225 mW	100 MHz	500mV	200	-55 to 150°C	SOT-23	Yes
BC848B,215	Nexperia USA Inc.	100 mA	30 V	250 mW	100 MHz	600mV	200	-55 to 150°C	TO-236AB	Yes
BC848B-7-F	Diodes Incorporated	100 mA	30 V	300 mW	300 MHz	600mV	200	-65 to 150°C	SOT-23-3	—
BC848BLT1G	onsemi	100 mA	30 V	300 mW	100 MHz	600mV	200	-55 to 150°C	SOT-23-3	—
BC848BLT3G	onsemi	100 mA	30 V	300 mW	100 MHz	600mV	200	-55 to 150°C	SOT-23-3	—
BC849B,215	Nexperia USA Inc.	100 mA	30 V	250 mW	100 MHz	600mV	200	-55 to 150°C	TO-236AB	Yes
BC849BLT1G	onsemi	100 mA	30 V	300 mW	100 MHz	600mV	200	-55 to 150°C	SOT-23-3	—
NSVBC848CLT1G	onsemi	100 mA	30 V	225 mW	100 MHz	600mV	200	-55 to 150°C	SOT-23-3	—
SBC848BLT1G	onsemi	100 mA	30 V	300 mW	100 MHz	600mV	200	-55 to 150°C	SOT-23-3	Yes

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

BC848B-TP and BC848BHE3-TP from Micro Commercial Co are parametric equivalents to the BC849B-TP. These parts maintain identical electrical specifications and packaging. BC848BHE3-TP carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

Secondary Substitutes (Equivalent Performance)

BC848BLT1G, BC848BLT3G, BC849BLT1G, and SBC848BLT1G from onsemi provide equivalent electrical performance with increased power dissipation capability (300 mW versus 225 mW). SBC848BLT1G includes AEC-Q101 automotive qualification. These parts are suitable for applications where thermal margin is beneficial.

Alternative Substitutes (Nexperia Manufacturer)

BC848B,215 and BC849B,215 from Nexperia USA Inc. are available in TO-236AB packaging with AEC-Q101 automotive qualification. Both parts feature 250 mW power dissipation and 600 mV Vce saturation specification. These parts are suitable for automotive and industrial applications.

Enhanced Performance Substitute

BC848B-7-F from Diodes Incorporated offers extended transition frequency (300 MHz versus 100 MHz) and expanded operating temperature range (-65°C to 150°C). This part is suitable for high-frequency applications or extended low-temperature operation.

Specialized Substitute

NSVBC848CLT1G from onsemi maintains the original 225 mW power specification with 600 mV Vce saturation. This part is suitable for applications requiring exact power dissipation matching.

All substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating. Selection should be based on specific application requirements for power dissipation, frequency response, temperature range, and automotive qualification status.

Frequently Asked Questions (FAQ)

Q: Can BC848B-TP be used as a direct replacement for BC849B-TP?

A: Yes. BC848B-TP is a parametric equivalent with identical electrical specifications: 30 V breakdown voltage, 100 mA maximum collector current, 225 mW power dissipation, 100 MHz transition frequency, and 200 minimum DC current gain. Both parts use SOT-23 surface mount packaging.

Q: What is the difference between BC849B-TP and BC849BLT1G?

A: BC849BLT1G is manufactured by onsemi and features increased power dissipation (300 mW versus 225 mW) and 600 mV Vce saturation specification (versus 500 mV). Electrical performance and packaging remain compatible. The higher power rating provides additional thermal margin in the same package.

Q: Are automotive-qualified versions available?

A: Yes. BC848BHE3-TP (Micro Commercial Co), BC848B,215 (Nexperia), BC849B,215 (Nexperia), and SBC848BLT1G (onsemi) all carry AEC-Q101 automotive qualification.

Q: Can BC848B-7-F be used in place of BC849B-TP?

A: Yes, with consideration for enhanced specifications. BC848B-7-F maintains all core electrical requirements (30 V, 100 mA, 100 MHz minimum) but offers 300 MHz transition frequency and extended temperature range (-65°C to 150°C). The higher frequency capability and lower temperature limit are compatible with BC849B-TP applications.

Q: What is the difference between SOT-23 and SOT-23-3 packaging?

A: SOT-23 and SOT-23-3 refer to the same three-lead surface mount package (TO-236-3, SC-59). Designations vary by manufacturer but represent identical physical and electrical interfaces.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, matching the original BC849B-TP specification.

Q: Which substitute offers the best thermal performance?

A: BC848B-7-F, BC848BLT1G, BC848BLT3G, BC849BLT1G, and SBC848BLT1G all feature 300 mW power dissipation, providing 33% greater thermal capacity than the original 225 mW specification in the same SOT-23 package.

Q: Can I use NSVBC848CLT1G if power dissipation matching is critical?

A: Yes. NSVBC848CLT1G maintains the original 225 mW power specification while providing onsemi manufacturing and 600 mV Vce saturation. This part is suitable for applications requiring exact power dissipation matching.

Q: What packaging options are available for substitutes?

A: All substitute parts use SOT-23 or SOT-23-3 surface mount packaging (equivalent to TO-236-3, SC-59). Nexperia parts are available in TO-236AB variant. All packages are mechanically and electrically compatible.

Q: Are there inventory considerations for substitute selection?

A: Inventory levels vary by part number and manufacturer. BC848BLT1G (onsemi) has 17,300 units in stock, while BC849BLT1G has 1,122 units. BC848B-TP (Micro Commercial Co) has 19,677 units available. Specific application requirements and supply chain strategy should guide selection.

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