BC847CM,315 Equivalent & Substitute Parts

Part Overview

The BC847CM,315 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This surface mount 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 Active product status and carries AEC-Q101 automotive qualification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the allowed parameter specifications.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Max)	100	mA
Collector-Emitter Breakdown Voltage (Max)	45	V
Power Dissipation (Max)	250	mW
Transition Frequency	100	MHz
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
AEC-Q101 Qualification	Yes	—

Substitute Part Grouping Explanation

Substitution of the BC847CM,315 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Transistor type: NPN
Collector current (maximum): 100 mA
Collector-emitter breakdown voltage (maximum): 45 V
Transition frequency: 100 MHz
Collector cutoff current: 15 nA (ICBO)
Power dissipation: minimum 250 mW

Mechanical Compatibility Criteria:

Mounting type: Surface Mount
Packaging: Tape & Reel (TR)
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

Identified Substitute Parts:

BC847BLP-7 (Diodes Incorporated)
BC847BLP4-7B (Diodes Incorporated)
NST847BF3T5G (onsemi)

All substitute parts meet the electrical performance requirements and regulatory compliance standards. Package form factors differ (SOT-883, 3-UFDFN, 3-XFDFN, SOT-1123) and must be evaluated for physical board layout compatibility.

Parameter Comparison

Parameter	BC847CM,315 (Nexperia)	BC847BLP-7 (Diodes)	BC847BLP4-7B (Diodes)	NST847BF3T5G (onsemi)
Transistor Type	NPN	NPN	NPN	NPN
Collector Current (Max)	100 mA	100 mA	100 mA	100 mA
Collector-Emitter Breakdown Voltage (Max)	45 V	45 V	45 V	45 V
Vce Saturation (Max) @ Ib, Ic	400 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA	600 mV @ 5 mA, 100 mA
Collector Cutoff Current (Max)	15 nA (ICBO)	15 nA (ICBO)	15 nA (ICBO)	15 nA (ICBO)
DC Current Gain (hFE Min) @ Ic, Vce	420 @ 2 mA, 5 V	200 @ 2 mA, 5 V	200 @ 2 mA, 5 V	200 @ 2 mA, 5 V
Power Dissipation (Max)	250 mW	250 mW	250 mW	290 mW
Transition Frequency	100 MHz	100 MHz	100 MHz	100 MHz
Operating Temperature Range	Up to 150°C (TJ)	−55°C to 150°C (TJ)	−55°C to 150°C (TJ)	−55°C to 150°C (TJ)
Package / Case	SC-101, SOT-883	3-UFDFN	3-XFDFN	SOT-1123
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original BC847CM,315 specification. The following considerations apply to component selection:

BC847BLP-7 and BC847BLP4-7B (Diodes Incorporated): These parts share the BC847 base product number and deliver equivalent electrical performance across all critical parameters. Both devices support the full operating temperature range (−55°C to 150°C) and maintain unlimited moisture sensitivity classification. Package form factors (3-UFDFN and 3-XFDFN) differ from the original SOT-883, requiring verification of physical footprint compatibility with existing printed circuit board layouts.

NST847BF3T5G (onsemi): This device provides equivalent electrical performance with a higher maximum power dissipation rating (290 mW versus 250 mW), offering additional thermal margin in power-constrained applications. The SOT-1123 package differs from the original SOT-883 form factor. The part operates across the extended temperature range (−55°C to 150°C) and maintains full regulatory compliance.

DC Current Gain Consideration: The BC847CM,315 specifies a minimum DC current gain (hFE) of 420 at 2 mA and 5 V. All substitute parts specify a minimum hFE of 200 under identical test conditions. Applications requiring the higher gain specification of the original part must account for this parameter difference in circuit design.

Automotive Qualification: The BC847CM,315 carries AEC-Q101 automotive qualification. Substitute parts from Diodes Incorporated and onsemi are Active status components; verification of automotive qualification status should be confirmed through manufacturer datasheets if automotive-grade reliability is required.

Frequently Asked Questions (FAQ)

Q: Can BC847BLP-7 be used as a direct replacement for BC847CM,315?

A: BC847BLP-7 meets all electrical performance requirements (100 mA collector current, 45 V breakdown voltage, 100 MHz transition frequency) and regulatory compliance standards. However, the package form factor differs (3-UFDFN versus SOT-883), requiring physical footprint verification on the printed circuit board. The DC current gain specification is lower (200 versus 420 minimum), which must be evaluated in the circuit design context.

Q: What is the primary difference between BC847BLP-7 and BC847BLP4-7B?

A: Both parts are manufactured by Diodes Incorporated and deliver identical electrical performance. The primary difference is the package designation: BC847BLP-7 uses the 3-UFDFN package (X1-DFN1006-3), while BC847BLP4-7B uses the 3-XFDFN package (X2-DFN1006-3). Physical dimensions and land pattern layouts differ between these packages.

Q: Why does NST847BF3T5G have a higher power dissipation rating?

A: NST847BF3T5G is rated for 290 mW maximum power dissipation compared to 250 mW for the BC847CM,315. This difference reflects the thermal characteristics of the SOT-1123 package form factor, which provides enhanced heat dissipation capability relative to the SOT-883 package.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. BC847BLP-7, BC847BLP4-7B, and NST847BF3T5G all carry ROHS3 compliance certification, matching the original BC847CM,315 specification.

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

A: BC847CM,315 operates to a maximum junction temperature of 150°C. BC847BLP-7, BC847BLP4-7B, and NST847BF3T5G all support the extended operating range of −55°C to 150°C junction temperature, providing broader environmental compatibility.

Q: How do the Vce saturation specifications compare?

A: BC847CM,315 specifies 400 mV maximum Vce saturation at 5 mA base current and 100 mA collector current. All substitute parts specify 600 mV under identical test conditions. This 200 mV difference must be evaluated in switching applications where saturation voltage directly affects circuit performance.

Q: Is the BC847CM,315 AEC-Q101 qualified?

A: Yes, BC847CM,315 carries AEC-Q101 automotive qualification. Automotive qualification status for substitute parts should be confirmed through manufacturer documentation if automotive-grade reliability is a design requirement.

Q: Can package form factors be interchanged on the same printed circuit board?

A: No. SOT-883, 3-UFDFN, 3-XFDFN, and SOT-1123 packages have different physical dimensions and land pattern layouts. Each package requires a dedicated footprint design on the printed circuit board. Substitution between packages requires layout redesign and verification.

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