BC847CW/MIX Equivalent & Substitute Parts

Part Overview

The BC847CW/MIX is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This device features a 45 V collector-emitter breakdown voltage, 100 mA maximum collector current, and 200 mW power dissipation in a surface mount SOT-323 package. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain electrical and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector-Emitter Breakdown Voltage (Max)	45	V
Collector Current (Max)	100	mA
Power Dissipation (Max)	200	mW
Transition Frequency	100	MHz
DC Current Gain (hFE Min)	420	@ 2mA, 5V
Operating Temperature (Max)	150	°C
Package	SOT-323 (SC-70)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC847CW/MIX is determined by strict equivalence across the following critical parameters: transistor type (NPN), collector-emitter breakdown voltage (45 V), maximum collector current (100 mA), power dissipation (200 mW), transition frequency (100 MHz minimum), DC current gain (420 @ 2mA, 5V minimum), operating temperature range (150°C maximum), and package type (SOT-323).

Substitute parts are classified into two categories:

Direct Parametric Equivalents maintain all electrical specifications and differ only in packaging format (Cut Tape, Tape & Reel) or product qualification level (standard vs. automotive AEC-Q101). These parts are fully interchangeable in circuit applications.

Similar Parametric Equivalents originate from alternative manufacturers (Diodes Incorporated, Taiwan Semiconductor Corporation, onsemi) and maintain core electrical specifications but may exhibit variations in secondary parameters such as collector cutoff current (ICBO), transition frequency, or power dissipation. These parts are functionally compatible but require circuit-level validation for specific applications.

Parameter Comparison

Part Number	Manufacturer	Vce(Sat) @ 5mA, 100mA	Ic (Max)	Vce(Br) (Max)	hFE (Min)	fT	Power (Max)	Status	Grade
BC847CW/MIX	Nexperia USA Inc.	400mV	100 mA	45 V	420	100 MHz	200 mW	Obsolete	Automotive
BC847CW,115	Nexperia USA Inc.	400mV	100 mA	45 V	420	100 MHz	200 mW	Active	Standard
BC847CW,135	Nexperia USA Inc.	400mV	100 mA	45 V	420	100 MHz	200 mW	Active	Standard
BC847CW-QF	Nexperia USA Inc.	400mV	100 mA	45 V	420	100 MHz	200 mW	Active	Automotive
BC847CW-QX	Nexperia USA Inc.	400mV	100 mA	45 V	420	100 MHz	200 mW	Active	Automotive
BC847CW/DG/B4X	Nexperia USA Inc.	400mV	100 mA	45 V	420	100 MHz	200 mW	Active	Automotive
BC850CW,115	Nexperia USA Inc.	600mV	100 mA	45 V	420	100 MHz	200 mW	Active	Automotive
BC850CW,135	Nexperia USA Inc.	600mV	100 mA	45 V	420	100 MHz	200 mW	Active	Automotive
BC847CW-7-F	Diodes Incorporated	600mV	100 mA	45 V	420	300 MHz	200 mW	Active	Standard
BC850CW RFG	Taiwan Semiconductor Corporation	600mV	100 mA	45 V	420	100 MHz	200 mW	Active	Standard
SBC847AWT1G	onsemi	600mV	100 mA	45 V	110	100 MHz	150 mW	Active	Automotive

Engineering Selection Recommendations

Primary Substitutes (Direct Nexperia Equivalents)

BC847CW,115 and BC847CW,135 are direct parametric equivalents manufactured by Nexperia USA Inc. with identical electrical specifications to the BC847CW/MIX. Both parts maintain 400 mV Vce saturation, 420 minimum hFE, and 100 MHz transition frequency. These parts differ only in packaging format (Cut Tape vs. Tape & Reel) and are recommended as primary replacements for non-automotive applications. Both parts carry active product status and ROHS3 compliance.

BC847CW-QF and BC847CW-QX are automotive-grade equivalents (AEC-Q101 qualified) with identical electrical performance to the BC847CW/MIX. These parts are suitable for automotive and mission-critical applications requiring qualification documentation. Both maintain active product status.

BC847CW/DG/B4X is an automotive-grade variant with identical specifications and AEC-Q101 qualification, suitable for applications requiring automotive-level reliability.

Secondary Substitutes (BC850 Series)

BC850CW,115 and BC850CW,135 are Nexperia automotive-grade alternatives with higher Vce saturation (600 mV vs. 400 mV). These parts maintain all other electrical parameters and are suitable for applications where saturation voltage tolerance permits. Both carry AEC-Q101 qualification and active product status.

Alternative Manufacturer Options

BC847CW-7-F (Diodes Incorporated) maintains electrical compatibility with enhanced transition frequency (300 MHz vs. 100 MHz) and is suitable for higher-frequency applications. This part carries active product status and ROHS3 compliance.

BC850CW RFG (Taiwan Semiconductor Corporation) provides an alternative source with 600 mV Vce saturation and active product status. Operating temperature range extends to −55°C.

SBC847AWT1G (onsemi) is an automotive-qualified alternative with reduced DC current gain (110 vs. 420) and lower power dissipation (150 mW vs. 200 mW). This part is suitable for applications with relaxed current gain requirements and carries AEC-Q101 qualification.

Frequently Asked Questions (FAQ)

Q: Can BC847CW,115 directly replace BC847CW/MIX in existing designs?

A: Yes. BC847CW,115 maintains identical electrical specifications including 400 mV Vce saturation, 420 minimum hFE, 100 mA collector current, and 45 V breakdown voltage. The only difference is packaging format (Cut Tape vs. original format). Both are SOT-323 packages with identical pinout and thermal characteristics.

Q: What is the difference between BC847CW and BC850CW series?

A: The primary difference is Vce saturation voltage. BC847CW maintains 400 mV saturation, while BC850CW exhibits 600 mV saturation at identical bias conditions (5 mA base current, 100 mA collector current). All other parameters remain equivalent. BC850CW is suitable for applications where higher saturation voltage is acceptable.

Q: Are automotive-grade parts (AEC-Q101) required for this application?

A: Automotive-grade qualification is required only for automotive and mission-critical applications. Standard-grade parts (BC847CW,115 and BC847CW,135) are suitable for consumer and industrial applications. Automotive-grade variants (BC847CW-QF, BC847CW-QX, BC847CW/DG/B4X) provide additional qualification documentation and reliability assurance for automotive use.

Q: Does the transition frequency difference between 100 MHz and 300 MHz affect circuit compatibility?

A: Higher transition frequency (300 MHz in BC847CW-7-F) provides enhanced performance margin for high-frequency applications but does not degrade performance in circuits designed for 100 MHz operation. Selection depends on application frequency requirements and cost considerations.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture bake-out requirements. All listed substitute parts carry MSL 1 classification, ensuring identical moisture handling and storage requirements.

Q: Can SBC847AWT1G replace BC847CW/MIX despite lower hFE specification?

A: SBC847AWT1G exhibits 110 minimum hFE compared to 420 for BC847CW/MIX. This part is suitable only for applications where circuit design accommodates lower current gain. Direct substitution without circuit modification is not recommended.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, ensuring compatibility with environmental and regulatory requirements equivalent to the BC847CW/MIX.

Q: What packaging options are available for BC847CW equivalents?

A: Nexperia BC847CW equivalents are available in Cut Tape (CT) & Digi-Reel format (BC847CW,115) and Tape & Reel (TR) format (BC847CW,135, BC847CW-QF, BC847CW-QX). All variants use SOT-323 package with identical pinout and mechanical dimensions.

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