BC846B B5003 NPN Bipolar Junction Transistor Equivalent & Substitute Parts

Part Overview

The BC846B B5003 is an NPN bipolar junction transistor manufactured by Infineon Technologies, designed for general-purpose switching and amplification applications in surface mount configurations. This device operates at a maximum collector voltage of 65V with a collector current rating of 100mA and a transition frequency of 250MHz. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters. Substitute parts must satisfy the core electrical requirements: NPN transistor type, 65V collector-emitter breakdown voltage, 100mA maximum collector current, and SOT-23-3 surface mount packaging.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector-Emitter Breakdown Voltage (Max)	65	V
Collector Current (Max)	100	mA
DC Current Gain (hFE Min) @ Ic, Vce	200 @ 2mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	600mV @ 5mA, 100mA	—
Collector Cutoff Current (Max)	15	nA
Power Dissipation (Max)	330	mW
Transition Frequency	250	MHz
Operating Temperature (Max)	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC846B B5003 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (mandatory)
Collector-Emitter Breakdown Voltage: 65V minimum
Collector Current Rating: 100mA minimum
DC Current Gain (hFE): 200 minimum @ 2mA, 5V
Package: SOT-23-3 / TO-236-3 surface mount (mandatory)
Mounting Type: Surface Mount (mandatory)

Acceptable Parameter Variations:

Power Dissipation: 225mW or greater (original: 330mW)
Transition Frequency: 100MHz or greater (original: 250MHz)
Vce Saturation: up to 600mV @ 5mA, 100mA
Collector Cutoff Current: up to 15nA
Operating Temperature: -55°C to 150°C or 150°C maximum

Parts meeting all primary criteria and operating within acceptable parameter ranges are classified as direct substitutes. Parts with reduced voltage ratings (50V) or increased current requirements (2A) are classified as application-dependent alternatives and require circuit-level evaluation.

Parameter Comparison

Part Number	Manufacturer	Vce(BR) Max (V)	Ic Max (mA)	hFE Min @ Ic, Vce	Power Max (mW)	fT (MHz)	Package	Status
BC846B B5003	Infineon Technologies	65	100	200 @ 2mA, 5V	330	250	SOT-23-3	Obsolete
BC846B,215	Nexperia USA Inc.	65	100	200 @ 2mA, 5V	250	100	SOT-23-3	Active
BC846B-7-F	Diodes Incorporated	65	100	200 @ 2mA, 5V	300	300	SOT-23-3	Active
BC846B-TP	Micro Commercial Co	65	100	200 @ 2mA, 5V	225	100	SOT-23-3	Active
BC846BLT3G	onsemi	65	100	200 @ 2mA, 5V	300	100	SOT-23-3	Active
SBC846BLT1G	onsemi	65	100	200 @ 2mA, 5V	300	100	SOT-23-3	Active
SBC846BLT3G	onsemi	65	100	200 @ 2mA, 5V	300	100	SOT-23-3	Active
2PD601ART,235	Nexperia USA Inc.	50	100	210 @ 2mA, 10V	250	100	SOT-23-3	Active
2SC5866TLQ	Rohm Semiconductor	60	2000	120 @ 100mA, 2V	500	200	TSMT3	Active
2SC5866TLR	Rohm Semiconductor	60	2000	120 @ 100mA, 2V	500	200	TSMT3	Active
BC817-40-7-F	Diodes Incorporated	45	500	250 @ 100mA, 1V	310	100	SOT-23-3	Active

Engineering Selection Recommendations

Direct Substitutes (Recommended Primary Selection):

Parts BC846B,215 (Nexperia), BC846B-7-F (Diodes Incorporated), BC846B-TP (Micro Commercial Co), BC846BLT3G (onsemi), SBC846BLT1G (onsemi), and SBC846BLT3G (onsemi) satisfy all primary substitution criteria. These parts maintain 65V collector-emitter breakdown voltage, 100mA collector current rating, SOT-23-3 packaging, and NPN transistor configuration. All listed substitutes are classified as Active products with RoHS3 compliance and REACH Unaffected status.

Automotive-Grade Alternatives:

SBC846BLT1G and SBC846BLT3G are qualified to AEC-Q101 automotive standards. These parts are suitable for applications requiring automotive-grade reliability and traceability.

Application-Dependent Alternatives:

2PD601ART,235 (Nexperia) operates at 50V maximum collector-emitter breakdown voltage, which is below the original 65V specification. This part is suitable only for applications where the circuit design operates below 50V. 2SC5866TLQ and 2SC5866TLR (Rohm Semiconductor) feature 2A collector current and different package configuration (TSMT3). These parts are suitable for higher-current applications but require circuit-level evaluation due to package incompatibility with SOT-23-3 footprints.

Not Recommended:

BC817-40-7-F (Diodes Incorporated) operates at 45V maximum collector-emitter breakdown voltage, below the original 65V specification, and is not suitable for direct substitution in circuits designed for 65V operation.

Frequently Asked Questions (FAQ)

Q: Can BC846B,215 from Nexperia directly replace BC846B B5003 from Infineon?

A: Yes. BC846B,215 meets all primary substitution criteria: 65V collector-emitter breakdown voltage, 100mA collector current, 200 minimum hFE @ 2mA/5V, and SOT-23-3 surface mount package. The part is Active status with RoHS3 compliance. Power dissipation is 250mW versus the original 330mW, and transition frequency is 100MHz versus 250MHz. These variations are within acceptable ranges for general-purpose switching applications.

Q: What is the difference between BC846BLT3G and SBC846BLT1G?

A: Both parts are manufactured by onsemi and meet identical electrical specifications: 65V, 100mA, 200 hFE minimum, SOT-23-3 package. SBC846BLT1G and SBC846BLT3G carry AEC-Q101 automotive qualification, while BC846BLT3G does not. The "S" prefix in SBC846 designates automotive-grade qualification. Selection depends on application requirements for automotive certification.

Q: Why is 2PD601ART,235 listed as an alternative if it has only 50V rating?

A: 2PD601ART,235 is listed as a manufacturer-recommended alternative but operates at 50V maximum collector-emitter breakdown voltage, below the original 65V specification. This part is suitable only for circuits designed to operate below 50V. Direct substitution in 65V-rated circuits is not appropriate.

Q: Can 2SC5866TLQ replace BC846B B5003 in my application?

A: 2SC5866TLQ is not a direct substitute. While it is an NPN transistor with adequate voltage and current ratings, it features a different package (TSMT3 versus SOT-23-3), higher collector current (2A versus 100mA), and different hFE characteristics (120 @ 100mA/2V versus 200 @ 2mA/5V). Package incompatibility prevents direct PCB footprint replacement. Application-level evaluation is required.

Q: What does RoHS3 compliance mean for component selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All listed active substitutes carry RoHS3 compliance, ensuring regulatory alignment with modern manufacturing and environmental standards.

Q: Are there packaging differences between substitute parts?

A: All direct substitutes (BC846B,215, BC846B-7-F, BC846B-TP, BC846BLT3G, SBC846BLT1G, SBC846BLT3G) use SOT-23-3 / TO-236-3 surface mount packaging, compatible with the original BC846B B5003 footprint. 2SC5866 variants use TSMT3 package and are not footprint-compatible. 2PD601ART,235 uses TO-236AB package, which is mechanically compatible with SOT-23-3 footprints.

Q: Which substitute offers the best performance match to the original BC846B B5003?

A: BC846B-7-F (Diodes Incorporated) provides the closest performance match with 300MHz transition frequency (versus original 250MHz), 65V rating, 100mA current, and 300mW power dissipation. This part maintains all electrical specifications within the original design envelope while offering Active product status and full RoHS3 compliance.

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