BC850CW_R1_00001 Equivalent & Substitute Parts

Part Overview

The BC850CW_R1_00001 is an NPN bipolar junction transistor manufactured by Panjit International Inc., designed for small-signal switching and amplification applications. This surface-mount device operates at a maximum collector current of 100 mA with a collector-emitter breakdown voltage of 45 V and a transition frequency of 100 MHz. The part is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and operational parameters that ensure functional interchangeability within specified application constraints.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA	—
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) Min @ Ic, Vce	420 @ 2 mA, 5 V	—
Power - Max	250	mW
Frequency - Transition	100	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BC850CW_R1_00001 are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Critical Matching Parameters:

Transistor Type: NPN
Maximum Collector Current (Ic): 100 mA
Collector-Emitter Breakdown Voltage: 45 V
Package / Case: SC-70 or SOT-323
Mounting Type: Surface Mount
Operating Temperature Range: Minimum -55°C to 150°C

Secondary Compatibility Parameters:

Vce Saturation characteristics at specified bias conditions
DC Current Gain (hFE) minimum values
Transition Frequency: 100 MHz or higher
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Parts are grouped into two categories:

Upgrade Substitutes: Parts with identical or superior electrical specifications and enhanced availability or packaging options.

Similar Substitutes: Parts with equivalent core electrical parameters but variations in secondary characteristics such as power dissipation, current gain ranges, or transition frequency that remain within acceptable application tolerances.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce Breakdown (Max) V	Vce Sat (Max) mV	hFE (Min) @ 2mA, 5V	Power (Max) mW	Freq (MHz)	Temp Range °C	Package	Packaging Type
BC850CW_R1_00001	Panjit International Inc.	100	45	600	420	250	100	-55 to 150	SOT-323	Tape & Reel
BC847CW-TP	Micro Commercial Co	100	45	600	420	—	100	-65 to 150	SOT-323	Cut Tape & Digi-Reel
BC847AW RFG	Taiwan Semiconductor Corporation	100	45	600	110	200	100	-55 to 150	SOT-323	Tape & Reel
BC847AW,115	NXP Semiconductors	100	45	400	110	200	100	-55 to 150	SOT-323	Bulk
BC847BW RFG	Taiwan Semiconductor Corporation	100	45	600	200	200	100	-55 to 150	SOT-323	Tape & Reel
BC847BWT1G	onsemi	100	45	600	200	150	100	-55 to 150	SOT-323	Cut Tape & Digi-Reel
BC847CW RFG	Taiwan Semiconductor Corporation	100	45	600	420	200	100	-55 to 150	SOT-323	Tape & Reel
BC847CW-7-F	Diodes Incorporated	100	45	600	420	200	300	-65 to 150	SOT-323	Tape & Reel
BC850AW RFG	Taiwan Semiconductor Corporation	100	45	600	110	200	100	-55 to 150	SOT-323	Tape & Reel
BC850BW RFG	Taiwan Semiconductor Corporation	100	45	600	200	200	100	-55 to 150	SOT-323	Tape & Reel
BC850CW RFG	Taiwan Semiconductor Corporation	100	45	600	420	200	100	-55 to 150	SOT-323	Tape & Reel

Engineering Selection Recommendations

Direct Equivalents (Highest Compatibility):

BC847CW RFG and BC850CW RFG from Taiwan Semiconductor Corporation are direct electrical equivalents to the BC850CW_R1_00001. Both parts match the critical parameters: 100 mA collector current, 45 V breakdown voltage, 600 mV saturation voltage, 420 hFE minimum gain, and 100 MHz transition frequency. All three parts are RoHS3 compliant with MSL 1 rating and operate across the -55°C to 150°C temperature range. These parts are suitable for direct substitution in existing designs without circuit modification.

Upgrade Substitute (Enhanced Specifications):

BC847CW-TP from Micro Commercial Co extends the operating temperature range to -65°C, providing enhanced low-temperature performance. This part maintains all critical electrical parameters and is available in Cut Tape & Digi-Reel packaging, offering alternative supply chain options. The extended temperature range qualifies this part for applications requiring operation below -55°C.

Alternative Substitutes (Reduced Power Dissipation):

BC847BWT1G from onsemi and BC847BW RFG from Taiwan Semiconductor Corporation feature reduced maximum power dissipation (150 mW and 200 mW respectively, compared to 250 mW for the main part) while maintaining 100 mA collector current and 45 V breakdown voltage. These parts are suitable for applications where thermal management is a design constraint. The hFE minimum of 200 is lower than the main part's 420, which may affect gain-dependent circuit performance.

Enhanced Frequency Performance:

BC847CW-7-F from Diodes Incorporated provides a transition frequency of 300 MHz, triple that of the main part, while maintaining all other critical parameters. This part is suitable for applications requiring higher-frequency operation and extends the operating temperature range to -65°C. The higher transition frequency does not degrade performance in lower-frequency applications.

Lower Gain Alternatives:

BC847AW RFG and BC850AW RFG feature hFE minimum of 110, significantly lower than the main part's 420. These parts are suitable only for applications where lower current gain is acceptable or where gain variation is not critical to circuit function.

Compliance and Certification:

All listed substitute parts maintain RoHS3 compliance and MSL 1 rating. BC847AW,115 from NXP Semiconductors carries AEC-Q101 automotive qualification, suitable for automotive-grade applications. All parts are classified as Active product status with unlimited shelf life under controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can BC847CW-TP be used as a direct replacement for BC850CW_R1_00001?

A: Yes. BC847CW-TP matches all critical electrical parameters: 100 mA maximum collector current, 45 V breakdown voltage, 600 mV saturation voltage, and 420 hFE minimum. The extended operating temperature range (-65°C to 150°C) provides additional capability. The SOT-323 package is mechanically identical. Substitution requires no circuit modifications.

Q: What is the difference between BC850 and BC847 series transistors?

A: The BC850 and BC847 series are functionally equivalent NPN small-signal transistors with identical electrical specifications in this comparison. Both series are available in multiple gain grades (A, B, C variants). The primary difference is manufacturer and product line designation. Selection between series is based on availability, packaging options, and supply chain requirements rather than electrical performance.

Q: Are there differences in hFE (current gain) between the substitute parts?

A: Yes. The main part BC850CW_R1_00001 specifies hFE minimum of 420 @ 2 mA, 5 V. Substitute parts vary: BC847CW RFG and BC850CW RFG match this specification at 420. BC847BW RFG and BC850BW RFG specify 200. BC847AW RFG and BC850AW RFG specify 110. Lower hFE values reduce current amplification capability and may affect circuit gain in applications where transistor gain is a design parameter. Selection must account for circuit gain requirements.

Q: Can BC847BWT1G be used in high-power applications?

A: BC847BWT1G has a maximum power dissipation of 150 mW, lower than the main part's 250 mW. This part is suitable for applications where power dissipation is limited by thermal design constraints. In applications requiring sustained power dissipation above 150 mW, this part may require additional thermal management or is unsuitable without circuit redesign.

Q: What is the significance of the extended temperature range in BC847CW-TP?

A: BC847CW-TP operates from -65°C to 150°C, compared to the main part's -55°C to 150°C. The extended lower temperature limit (-65°C) qualifies this part for applications requiring operation in cold environments or equipment with wide ambient temperature specifications. All other electrical characteristics remain equivalent.

Q: Does BC847CW-7-F's higher transition frequency (300 MHz) affect performance in 100 MHz applications?

A: No. Higher transition frequency does not degrade performance in lower-frequency applications. BC847CW-7-F maintains all critical DC parameters and is fully compatible with circuits designed for 100 MHz operation. The higher frequency capability provides design margin and is suitable for future applications requiring higher-frequency performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level). All parts are suitable for applications with RoHS compliance requirements. Moisture sensitivity level 1 indicates no special moisture protection is required during storage or handling.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in three packaging formats: Tape & Reel (TR), Cut Tape & Digi-Reel, and Bulk. BC847CW-TP and BC847BWT1G are available in Cut Tape & Digi-Reel format, offering alternative supply chain options. BC847AW,115 is available in Bulk packaging. All other substitutes are available in Tape & Reel format. Package selection depends on production volume and supply chain requirements.

Q: Is NXP Semiconductors' BC847AW,115 suitable for automotive applications?

A: Yes. BC847AW,115 carries AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. This part is the only substitute with explicit automotive certification. Selection of this part is required for applications with automotive qualification requirements.

Q: Can multiple substitute parts be mixed in the same production run?

A: Electrical equivalence does not guarantee identical performance in all circuit conditions. Parts with different hFE specifications (110, 200, or 420) will produce different circuit gain. Parts with different power dissipation ratings (150 mW, 200 mW, or 250 mW) have different thermal characteristics. Mixing substitute parts with different electrical specifications in the same production run may result in performance variation. Consistent performance requires using a single part number or parts with identical electrical specifications.

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