BC847CW Equivalent & Substitute Parts

Part Overview

The BC847CW is an NPN bipolar junction transistor manufactured by Taiwan Semiconductor Corporation, designed for general-purpose switching and amplification applications. This surface-mount device operates at 45V collector-emitter breakdown voltage with a maximum collector current of 100mA and 200mW power dissipation. The part is currently in active production status with 305,400 units in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements across multiple manufacturers including Nexperia, NXP, Diodes Incorporated, Micro Commercial Co, Infineon Technologies, and onsemi.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Ic) Maximum	100	mA
Collector-Emitter Breakdown Voltage (Vceo)	45	V
Vce Saturation @ 5mA, 100mA	600	mV
Collector Cutoff Current (Icbo)	15	nA
DC Current Gain (hFE) @ 2mA, 5V	420	—
Power Dissipation Maximum	200	mW
Transition Frequency	100	MHz
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-323 (SC-70)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BC847CW 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)
Collector Current (Ic) Maximum: 100mA (mandatory match)
Collector-Emitter Breakdown Voltage: 45V (mandatory match)
Package Type: SOT-323/SC-70 (mandatory match for mechanical compatibility)
Mounting Type: Surface Mount (mandatory match)

Secondary Parameters Affecting Substitution Classification:

Vce Saturation: Acceptable range 400–600mV @ 5mA, 100mA
DC Current Gain (hFE): Acceptable range 110–420 @ 2mA, 5V
Transition Frequency: 100–300MHz acceptable
Power Dissipation: 150–250mW acceptable
Operating Temperature Range: -65°C to 150°C acceptable
Compliance: RoHS3 and REACH status maintained

Parts are classified as Upgrade, Similar, or Parametric Equivalent based on the degree of parameter alignment and manufacturing source. Upgrade parts offer improved specifications or enhanced availability. Similar parts maintain core electrical specifications with minor variations in secondary parameters. Parametric Equivalent parts provide direct functional replacement with identical or superior electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Ic (mA)	Vceo (V)	Vce Sat (mV)	hFE @ 2mA, 5V	Freq (MHz)	Power (mW)	Temp Range (°C)	Package	Status
BC847CW	Taiwan Semiconductor	100	45	600	420	100	200	-55 to 150	SOT-323	Active
BC847W,115	Nexperia USA Inc.	100	45	400	110	100	200	-55 to 150	SOT-323	Active
BC847W,135	NXP USA Inc.	100	45	400	110	100	200	-55 to 150	SOT-323	Active
BC847AW-7-F	Diodes Incorporated	100	45	600	110	300	200	-65 to 150	SOT-323	Active
BC847BW-TP	Micro Commercial Co	100	45	600	200	100	200	-65 to 150	SOT-323	Active
BC850BWH6327XTSA1	Infineon Technologies	100	45	600	200	250	250	-55 to 150	SOT-323	Last Time Buy
SBC847CWT3G	onsemi	100	45	600	420	100	150	-55 to 150	SOT-323	Active
BC847CW,115	Nexperia USA Inc.	100	45	400	420	100	200	-55 to 150	SOT-323	Active
BC847CW,135	Nexperia USA Inc.	100	45	400	420	100	200	-55 to 150	SOT-323	Active
BC850CW,115	Nexperia USA Inc.	100	45	600	420	100	200	-55 to 150	SOT-323	Active
BC850CW,135	Nexperia USA Inc.	100	45	600	420	100	200	-55 to 150	SOT-323	Active

Engineering Selection Recommendations

Parametric Equivalent Parts (Direct Replacement):

BC847CW,115 and BC847CW,135 (Nexperia USA Inc.) are parametric equivalents offering identical electrical performance to the BC847CW. Both parts maintain the 100mA collector current, 45V breakdown voltage, 420 hFE minimum gain, and 100MHz transition frequency. The primary difference is packaging format: BC847CW,115 is supplied in Cut Tape & Digi-Reel format with 912,619 units in stock, while BC847CW,135 is supplied in Tape & Reel format with 15,718 units in stock. Both are RoHS3 compliant and active production status. Selection between these variants depends on assembly line requirements and packaging preferences.

BC850CW,115 and BC850CW,135 (Nexperia USA Inc.) are parametric equivalents with identical electrical specifications to the BC847CW, including 420 hFE minimum gain and 100MHz transition frequency. These parts carry AEC-Q101 automotive qualification and are suitable for automotive-grade applications. BC850CW,115 offers 40,333 units in stock (Cut Tape & Digi-Reel), while BC850CW,135 offers 10,448 units (Tape & Reel). Both maintain RoHS3 compliance and active production status.

Upgrade Parts (Enhanced Specifications):

BC847W,115 and BC847W,135 (Nexperia USA Inc. and NXP USA Inc.) offer improved Vce saturation performance at 400mV compared to the BC847CW's 600mV, resulting in lower power dissipation during saturation. Both maintain 100mA collector current, 45V breakdown voltage, and 100MHz transition frequency. BC847W,115 provides 73,819 units in stock with Tape & Reel packaging. BC847W,135 provides 650,823 units in stock with Bulk packaging and automotive-grade qualification (AEC-Q101). These parts are suitable for applications requiring reduced saturation losses.

Similar Parts (Extended Specifications):

BC847AW-7-F (Diodes Incorporated) extends the operating temperature range to -65°C to 150°C and provides 300MHz transition frequency, compared to the BC847CW's 100MHz. This part maintains 100mA collector current and 45V breakdown voltage with 600mV Vce saturation. It is supplied in Tape & Reel format with 47,300 units in stock and is RoHS3 compliant. Selection is appropriate for high-frequency applications or extended temperature range requirements.

BC847BW-TP (Micro Commercial Co) extends the operating temperature range to -65°C to 150°C and provides 200 hFE minimum gain. This part maintains 100mA collector current, 45V breakdown voltage, 100MHz transition frequency, and 600mV Vce saturation. It is supplied in Tape & Reel format with 4,100 units in stock and is RoHS3 compliant.

SBC847CWT3G (onsemi) is an automotive-grade part with AEC-Q101 qualification, matching the BC847CW's 420 hFE minimum gain, 100MHz transition frequency, and -55°C to 150°C operating range. Power dissipation is 150mW compared to the BC847CW's 200mW. This part is supplied in Tape & Reel format with 6,340 units in stock and is RoHS3 compliant. Selection is appropriate for automotive applications requiring qualified components.

BC850BWH6327XTSA1 (Infineon Technologies) is a Last Time Buy part offering 250MHz transition frequency and 250mW power dissipation. This part maintains 100mA collector current, 45V breakdown voltage, and 200 hFE minimum gain. It is supplied in Tape & Reel format with 1,020 units in stock. This part is suitable only for applications where extended frequency response is required and supply continuity is not critical.

Frequently Asked Questions (FAQ)

Q: Can BC847CW,115 and BC847CW,135 be used interchangeably with the BC847CW?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 100mA collector current, 45V breakdown voltage, 420 hFE minimum gain, 100MHz transition frequency, and 200mW power dissipation. The difference is packaging format. BC847CW,115 is supplied in Cut Tape & Digi-Reel format, while BC847CW,135 is supplied in Tape & Reel format. Selection depends on assembly line equipment compatibility.

Q: What is the difference between BC847W,115 and the BC847CW?

A: BC847W,115 offers improved Vce saturation performance at 400mV compared to BC847CW's 600mV. This results in lower power dissipation during saturation operation. All other electrical parameters are identical: 100mA collector current, 45V breakdown voltage, 100MHz transition frequency, and 200mW power dissipation. BC847W,115 is manufactured by Nexperia USA Inc. and is suitable for applications where saturation losses must be minimized.

Q: Is BC847AW-7-F compatible with BC847CW in all applications?

A: BC847AW-7-F is electrically compatible for the core parameters: 100mA collector current, 45V breakdown voltage, and 100MHz minimum transition frequency. However, BC847AW-7-F provides 300MHz transition frequency, which exceeds the BC847CW specification. The operating temperature range extends to -65°C compared to BC847CW's -55°C minimum. BC847AW-7-F is manufactured by Diodes Incorporated. Compatibility depends on application-specific frequency and temperature requirements.

Q: Can automotive-qualified parts replace the standard BC847CW?

A: Yes. SBC847CWT3G (onsemi) and BC850CW variants (Nexperia USA Inc.) are automotive-qualified with AEC-Q101 certification. These parts maintain the BC847CW's core electrical specifications and can replace it in standard applications. Automotive qualification provides additional process controls and reliability assurance. Selection of automotive-qualified parts is appropriate when supply chain robustness or quality assurance requirements demand it.

Q: What is the significance of the packaging codes (115, 135) in Nexperia part numbers?

A: The packaging codes indicate distribution format. Code 115 denotes Cut Tape & Digi-Reel packaging, suitable for automated assembly lines with reel-fed equipment. Code 135 denotes Tape & Reel packaging, also suitable for automated assembly. Both formats contain the same electrical component; the difference is the physical packaging and handling method. Selection depends on assembly equipment compatibility and inventory management preferences.

Q: Why is BC850BWH6327XTSA1 marked as Last Time Buy?

A: Last Time Buy status indicates that Infineon Technologies is discontinuing this part. While it remains available in limited quantities (1,020 units in stock), new orders should transition to active production alternatives. BC850CW,115 and BC850CW,135 from Nexperia USA Inc. are recommended as active production replacements with identical core specifications and automotive qualification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and REACH Unaffected status, matching the BC847CW's environmental compliance profile. This ensures compatibility with regulatory requirements across all applications.

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

A: BC850CW and BC847CW are distinct base product numbers within the same family. Both maintain identical electrical specifications: 100mA collector current, 45V breakdown voltage, 100MHz transition frequency, and 200mW power dissipation. The BC850 series carries automotive-grade qualification (AEC-Q101) as standard, while BC847 variants may or may not include automotive qualification depending on the specific part number suffix. Selection between BC847 and BC850 depends on automotive qualification requirements.

Q: Can parts with different hFE values be substituted?

A: hFE (DC current gain) variation is acceptable within the specified range of 110–420 @ 2mA, 5V. Parts with lower hFE (such as BC847W variants at 110 minimum) require higher base current to achieve the same collector current. Parts with higher hFE (such as BC847CW at 420 minimum) require lower base current. Substitution is acceptable provided the application's bias network accommodates the hFE variation. Circuit redesign may be necessary for applications with tight gain requirements.

Q: What is the impact of Vce saturation differences on circuit performance?

A: Vce saturation ranges from 400mV to 600mV across the substitute parts. Lower saturation voltage (400mV in BC847W variants) results in lower power dissipation and improved efficiency in switching applications. Higher saturation voltage (600mV in BC847CW, BC847AW-7-F, BC847BW-TP, and BC850 variants) results in slightly higher power dissipation. Substitution is acceptable provided the application's power budget and thermal design accommodate the saturation voltage variation.

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