BC858C-TP Equivalent & Substitute Parts

Part Overview

The BC858C-TP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This surface mount device operates at 30 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and transition frequency of 200 MHz. The part is currently active in production with 1032 units in stock.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required for production processes, or when design specifications allow for compatible alternatives from different manufacturers. The BC858 family offers multiple variants across manufacturers with comparable electrical characteristics suitable for direct replacement in most applications.

Key Parameters

Parameter	BC858C-TP	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	30	V
Vce Saturation (Max) @ Ib, Ic	650 @ 5mA, 100mA	mV
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) Min @ Ic, Vce	420 @ 2mA, 5V	—
Power - Max	150	mW
Frequency - Transition	200	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution eligibility for the BC858C-TP is determined by the following critical parameters:

Mandatory Matching Parameters:

Transistor Type: PNP
Current - Collector (Ic) Max: 100 mA
Voltage - Collector Emitter Breakdown (Max): 30 V or higher
Vce Saturation (Max) @ Ib, Ic: 650 mV @ 5mA, 100mA
Operating Temperature Range: -55°C to 150°C minimum
Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, or SOT-23-3 compatible

Parameters Allowing Variation:

DC Current Gain (hFE): Substitute parts may have different minimum hFE values (125, 220, or 420) provided the application does not require a specific gain specification
Power - Max: Substitute parts may have equal or higher power ratings (150 mW, 200 mW, 250 mW, 300 mW, or 330 mW)
Frequency - Transition: Substitute parts may have equal or higher transition frequencies (100 MHz, 200 MHz, or 250 MHz)
Current - Collector Cutoff (Max): Substitute parts may have different ICBO values (15 nA or 100 nA)

All substitute parts listed maintain electrical compatibility within the BC858 family and are qualified for direct replacement in applications where the main part specifications are met or exceeded.

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vce Breakdown (V)	hFE Min @ 2mA, 5V	Power Max (mW)	Frequency (MHz)	Package	Status
BC858C-TP	Micro Commercial Co	100	30	420	150	200	SOT-23	Active
BC858A RFG	Taiwan Semiconductor Corporation	100	30	125	200	100	SOT-23	Active
BC858B RFG	Taiwan Semiconductor Corporation	100	30	220	200	100	SOT-23	Active
BC858BLT1G	onsemi	100	30	220	300	100	SOT-23-3	Active
BC858BLT3G	onsemi	100	30	220	300	100	SOT-23-3	Active
BC858C RFG	Taiwan Semiconductor Corporation	100	30	420	200	100	SOT-23	Active
BC858CE6327HTSA1	Infineon Technologies	100	30	420	330	250	PG-SOT23	Last Time Buy
BC859C,235	Nexperia USA Inc.	100	30	420	250	100	TO-236AB	Active
BCW61B,215	Nexperia USA Inc.	100	32	180	250	100	TO-236AB	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

BC858C RFG (Taiwan Semiconductor Corporation) and BC858CE6327HTSA1 (Infineon Technologies) are the most direct substitutes. Both maintain the BC858C specification with hFE minimum of 420 @ 2mA, 5V, matching the original part's current gain characteristics. BC858C RFG is available in active production status with 10,144 units in stock and is RoHS3 compliant. BC858CE6327HTSA1 offers enhanced performance with 250 MHz transition frequency and 330 mW power rating but carries Last Time Buy status, indicating limited future availability.

Secondary Substitutes (Electrical Compatibility with Gain Variation):

BC858B RFG and BC858BLT3G are suitable for applications where lower DC current gain (220 @ 2mA, 5V) is acceptable. BC858BLT3G from onsemi provides superior power dissipation capability at 300 mW and is available in high volume (39,897 units). Both onsemi variants (BC858BLT1G and BC858BLT3G) differ only in packaging format: Cut Tape & Digi-Reel versus Tape & Reel.

Conditional Substitutes (Parameter Deviations):

BC859C,235 (Nexperia USA Inc.) is qualified for automotive applications under AEC-Q101 and maintains matching electrical specifications. BCW61B,215 (Nexperia USA Inc.) operates at 32 V collector-emitter breakdown voltage, exceeding the 30 V requirement, but features lower hFE minimum (180 @ 2mA, 5V) and different saturation characteristics. BCW61B,215 is suitable only when the application does not require the higher current gain of the BC858C.

BC858A RFG carries the lowest hFE specification (125 @ 2mA, 5V) and is appropriate only for applications with minimal gain requirements.

Compliance and Certification:

All listed substitutes are RoHS3 compliant and REACH unaffected. BC859C,235 and BCW61B,215 carry AEC-Q101 automotive qualification. All parts maintain ECCN EAR99 classification and identical HTSUS code 8541.21.0075.

Frequently Asked Questions (FAQ)

Q: Can BC858A RFG replace BC858C-TP directly?

A: BC858A RFG is electrically compatible for switching applications but features lower DC current gain (125 versus 420 @ 2mA, 5V). Direct replacement is acceptable only if the application does not depend on high current gain or if circuit design accommodates lower hFE through increased base drive current.

Q: What is the difference between BC858BLT1G and BC858BLT3G?

A: Both parts are manufactured by onsemi with identical electrical specifications. BC858BLT1G is supplied in Cut Tape & Digi-Reel packaging, while BC858BLT3G is supplied in Tape & Reel format. Selection depends on production equipment compatibility and handling requirements.

Q: Is BC858CE6327HTSA1 suitable for new designs?

A: BC858CE6327HTSA1 carries Last Time Buy status, indicating the manufacturer has announced end-of-life production. This part is suitable for existing inventory management and legacy system support but is not recommended for new product designs requiring long-term component availability.

Q: Can BCW61B,215 be used as a substitute?

A: BCW61B,215 is electrically compatible with higher voltage rating (32 V versus 30 V) but exhibits different saturation characteristics (550 mV @ 1.25mA, 50mA versus 650 mV @ 5mA, 100mA) and lower current gain (180 versus 420 @ 2mA, 5V). Substitution is valid only when circuit design does not require the specific gain and saturation specifications of BC858C-TP.

Q: Are all substitute parts available in SOT-23 package?

A: Most substitutes are available in SOT-23 or SOT-23-3 package variants. BC859C,235 and BCW61B,215 are supplied in TO-236AB package, which is mechanically and electrically compatible with SOT-23-3 but may require PCB layout verification for pin alignment and thermal performance.

Q: What is the inventory status of substitute parts?

A: BC858BLT3G has the highest inventory (39,897 units), followed by BC858CE6327HTSA1 (102,300 units). BC858C RFG, BC858B RFG, and BC858A RFG maintain active inventory between 9,789 and 10,144 units. BCW61B,215 has limited availability at 1,213 units.

Q: Do all substitutes meet the -55°C to 150°C operating temperature range?

A: All listed substitutes support the full -55°C to 150°C operating temperature range required by BC858C-TP specifications.

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