BC856C Equivalent & Substitute Parts

Part Overview

The BC856C is an active PNP bipolar junction transistor manufactured by Diotec Semiconductor, designed for surface mount applications in the SOT-23-3 package. This component operates at a maximum collector current of 100 mA with a collector-emitter breakdown voltage of 65 V and a maximum power dissipation of 250 mW. The BC856C serves general-purpose switching and amplification functions in low-power electronic circuits.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative manufacturers offer compatible specifications, or when design requirements necessitate enhanced performance characteristics such as higher power ratings or extended frequency response.

Key Parameters

Parameter	BC856C Specification
Transistor Type	PNP
Current - Collector (Ic) (Max)	100 mA
Voltage - Collector Emitter Breakdown (Max)	65 V
Vce Saturation (Max) @ Ib, Ic	650 mV @ 5 mA, 100 mA
Current - Collector Cutoff (Max)	15 nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	420 @ 2 mA, 5 V
Power - Max	250 mW
Frequency - Transition	100 MHz
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23-3 (TO-236)
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the BC856C is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Transistor Type: PNP
Current - Collector (Ic) (Max): 100 mA
Voltage - Collector Emitter Breakdown (Max): 65 V
Vce Saturation (Max) @ Ib, Ic: 650 mV @ 5 mA, 100 mA
Operating Temperature Range: Minimum -55°C to maximum 150°C
Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3

Allowable Variation Parameters:

DC Current Gain (hFE): Substitute parts may exhibit different minimum hFE values (125 to 420) while maintaining functional compatibility
Power - Max: Substitute parts may have equal or higher power ratings (200 mW to 300 mW)
Frequency - Transition: Substitute parts may have equal or higher frequency response (100 MHz to 200 MHz)
Current - Collector Cutoff (Max): Substitute parts may have different ICBO values (15 nA to 100 nA)

All substitute parts listed maintain the base product number BC856 or SBC856 series designation and are classified as Active products.

Parameter Comparison

Parameter	BC856C (Diotec)	BC856A RFG (TSC)	BC856A,215 (Nexperia)	BC856B RFG (TSC)	BC856B-7-F (Diodes)	SBC856BLT1G (onsemi)	SBC856BLT3G (onsemi)
Transistor Type	PNP	PNP	PNP	PNP	PNP	PNP	PNP
Current - Collector (Ic) (Max)	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA
Voltage - Collector Emitter Breakdown (Max)	65 V	65 V	65 V	65 V	65 V	65 V	65 V
Vce Saturation (Max) @ Ib, Ic	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA
Current - Collector Cutoff (Max)	15 nA (ICBO)	100 nA (ICBO)	15 nA (ICBO)	100 nA (ICBO)	15 nA	15 nA (ICBO)	15 nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	420 @ 2 mA, 5 V	125 @ 2 mA, 5 V	125 @ 2 mA, 5 V	220 @ 2 mA, 5 V	220 @ 2 mA, 5 V	220 @ 2 mA, 5 V	220 @ 2 mA, 5 V
Power - Max	250 mW	200 mW	250 mW	200 mW	300 mW	300 mW	300 mW
Frequency - Transition	100 MHz	100 MHz	100 MHz	100 MHz	200 MHz	100 MHz	100 MHz
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23-3 (TO-236)	SOT-23	TO-236AB	SOT-23	SOT-23-3	SOT-23-3 (TO-236)	SOT-23-3 (TO-236)
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain active product status and are suitable for direct replacement in applications where the BC856C is specified. Selection among substitute parts is based on the following criteria:

Standard Industrial Applications: BC856A RFG and BC856B RFG (Taiwan Semiconductor Corporation) provide direct functional equivalence with lower power ratings (200 mW). These parts are suitable for applications where the reduced power specification does not constrain circuit design.

Enhanced Power Capability: BC856B-7-F (Diodes Incorporated), SBC856BLT1G, and SBC856BLT3G (onsemi) offer increased power dissipation (300 mW) and are suitable for applications requiring higher thermal headroom. BC856B-7-F additionally provides extended frequency response (200 MHz) for high-speed switching applications.

Automotive and Reliability-Critical Applications: BC856A,215 (Nexperia USA Inc.), SBC856BLT1G, and SBC856BLT3G (onsemi) carry AEC-Q101 automotive qualification and are designated for automotive-grade applications. These parts are ROHS3 compliant with REACH Unaffected status.

RoHS and Environmental Compliance: BC856A RFG, BC856B RFG, BC856B-7-F, SBC856BLT1G, and SBC856BLT3G are ROHS3 compliant with MSL rating of 1 (Unlimited). BC856C (Diotec) does not carry RoHS status designation.

Extended Temperature Range: BC856B-7-F (Diodes Incorporated) operates across -65°C to 150°C, providing extended low-temperature capability compared to the standard -55°C to 150°C range of other parts.

Frequently Asked Questions (FAQ)

Q: Can BC856A RFG be used as a direct replacement for BC856C?

A: BC856A RFG is functionally equivalent for applications where the 200 mW power rating is sufficient. The BC856A RFG exhibits lower DC current gain (125 minimum versus 420 minimum for BC856C) and higher collector cutoff current (100 nA versus 15 nA). These differences do not affect substitutability in standard switching and amplification circuits operating within the specified electrical parameters.

Q: What is the difference between BC856B-7-F and other BC856 variants?

A: BC856B-7-F (Diodes Incorporated) provides two distinct advantages: higher power dissipation (300 mW versus 250 mW or 200 mW) and higher transition frequency (200 MHz versus 100 MHz). The extended operating temperature range (-65°C to 150°C) provides additional low-temperature capability. These enhancements make BC856B-7-F suitable for high-speed switching applications and circuits operating in extended temperature environments.

Q: Are SBC856BLT1G and SBC856BLT3G interchangeable?

A: SBC856BLT1G and SBC856BLT3G are electrically and mechanically identical. Both are manufactured by onsemi, carry AEC-Q101 automotive qualification, and share identical electrical specifications. The designation difference reflects manufacturing lot or date code tracking and does not affect functional performance or substitutability.

Q: What packaging considerations apply to BC856 substitutes?

A: All listed substitute parts use the SOT-23-3 package family (TO-236-3, SC-59designations). Physical dimensions and pin configurations are identical across all parts. PCB footprints and assembly processes require no modification when substituting between listed parts.

Q: Which substitute part is recommended for automotive applications?

A: BC856A,215 (Nexperia USA Inc.), SBC856BLT1G, and SBC856BLT3G (onsemi) carry AEC-Q101 automotive qualification. These parts are suitable for automotive-grade circuit designs. SBC856BLT1G and SBC856BLT3G additionally provide 300 mW power rating and automotive-grade reliability certification.

Q: How does DC current gain variation affect circuit design?

A: DC current gain (hFE) ranges from 125 to 420 across the substitute parts. Circuits designed with base current calculations must account for the minimum hFE specification of the selected part. Applications using fixed base resistor networks should verify that the selected substitute part's hFE range does not cause saturation or cutoff operation outside design specifications.

Q: Are there compliance differences between substitute parts?

A: BC856C (Diotec) does not carry RoHS status designation. All substitute parts (BC856A RFG, BC856A,215, BC856B RFG, BC856B-7-F, SBC856BLT1G, SBC856BLT3G) are ROHS3 compliant with MSL rating of 1 (Unlimited). BC856A,215, SBC856BLT1G, and SBC856BLT3G carry REACH Unaffected status. Designs requiring RoHS compliance must select from the compliant substitute parts.

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