BC 856A E6327 Equivalent & Substitute Parts

Part Overview

The BC 856A E6327 is a PNP bipolar junction transistor manufactured by Infineon Technologies, designed for surface mount applications in the SOT-23 package. This component operates at a maximum collector voltage of 65 V with a collector current rating of 100 mA and a transition frequency of 250 MHz. The device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across critical parameters including voltage ratings, current capacity, and thermal characteristics while accommodating modern active product availability.

Key Parameters

Parameter	BC 856A E6327 Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	100	mA
Collector-Emitter Breakdown Voltage (Max)	65	V
VCE Saturation @ 5mA, 100mA	650	mV
Collector Cutoff Current (Max)	15	nA
DC Current Gain (hFE) @ 2mA, 5V	125 (Min)	—
Power Dissipation (Max)	330	mW
Transition Frequency	250	MHz
Operating Temperature (Max)	150	°C
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BC 856A E6327 are classified into two categories based on electrical parameter compatibility and product status:

Category 1: Direct Electrical Equivalents (Active Status) These parts maintain identical or superior electrical specifications across all critical parameters: PNP transistor type, 65 V collector-emitter breakdown voltage, 100 mA maximum collector current, 650 mV VCE saturation, 15 nA collector cutoff current, 125 minimum DC current gain at specified conditions, and SOT-23-3 package compatibility. Parts in this category include BC856,215 (Nexperia), BC856A,215 (Nexperia), BC856A-7-F (Diodes Incorporated), BC856A-TP (Micro Commercial Co), BC856ALT1G (onsemi), and SBC856ALT1G (onsemi). These components differ in transition frequency (100–200 MHz), power dissipation (250–310 mW), and packaging format (Cut Tape, Tape & Reel) but remain functionally interchangeable within the specified electrical envelope.

Category 2: Manufacturer-Recommended Alternatives (Enhanced or Modified Specifications) These parts are designated as manufacturer-recommended substitutes and include BC856B variants with modified DC current gain specifications (220 minimum vs. 125 minimum), and BC807-40-7-F, which operates at reduced voltage (45 V) and increased current (500 mA) ratings. These components are suitable for applications where the enhanced specifications provide design margin or where the original specification is not a limiting constraint.

Substitution logic is strictly based on the following allowed parameters: transistor type (PNP), collector-emitter breakdown voltage (65 V minimum), collector current (100 mA minimum), VCE saturation characteristics, package type (SOT-23-3 compatible), and surface mount mounting type. All substitute parts maintain the same base product number (BC 856) or equivalent lineage, ensuring design compatibility.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	VCEO (Max) V	VCE Sat mV	hFE (Min)	fT MHz	P (Max) mW	Temp (Max) °C	Package	Status
BC 856A E6327	Infineon	100	65	650	125	250	330	150	SOT-23-3	Obsolete
BC856,215	Nexperia	100	65	650	125	100	250	150	SOT-23-3	Active
BC856A,215	Nexperia	100	65	650	125	100	250	150	SOT-23-3	Active
BC856A-7-F	Diodes Incorporated	100	65	650	125	200	300	150	SOT-23-3	Active
BC856A-TP	Micro Commercial Co	100	65	650	125	200	310	150	SOT-23-3	Active
BC856ALT1G	onsemi	100	65	650	125	100	300	150	SOT-23-3	Active
SBC856ALT1G	onsemi	100	65	650	125	100	300	150	SOT-23-3	Active
BC807-40-7-F	Diodes Incorporated	500	45	700	250	100	310	150	SOT-23-3	Active
BC856B,215	Nexperia	100	65	650	220	100	250	150	SOT-23-3	Active
BC856B,235	NXP USA Inc.	100	65	650	220	100	250	150	SOT-23-3	Active
BC856B-7-F	Diodes Incorporated	100	65	650	220	200	300	150	SOT-23-3	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents)

For applications requiring direct electrical replacement of the BC 856A E6327 with active product status, the following parts are recommended:

BC856A-7-F (Diodes Incorporated) and BC856A-TP (Micro Commercial Co) provide transition frequencies of 200 MHz, exceeding the original 250 MHz specification while maintaining all other electrical parameters. Both components are active products with RoHS3 compliance and unlimited moisture sensitivity rating.

BC856ALT1G and SBC856ALT1G (onsemi) maintain 100 MHz transition frequency with 300 mW power dissipation. SBC856ALT1G carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

BC856,215 and BC856A,215 (Nexperia) provide 100 MHz transition frequency with 250 mW power dissipation. Both are active products with AEC-Q101 automotive qualification and RoHS3 compliance.

Secondary Substitutes (Modified Specifications)

BC856B variants (BC856B,215, BC856B,235, BC856B-7-F) maintain identical voltage and current ratings with increased DC current gain (220 minimum vs. 125 minimum). These components are suitable for applications where higher current gain provides design margin. BC856B-7-F offers 200 MHz transition frequency with 300 mW power dissipation.

Alternative Substitute (Enhanced Current Rating)

BC807-40-7-F (Diodes Incorporated) is designated as a manufacturer-recommended substitute with enhanced specifications: 500 mA collector current and 45 V collector-emitter breakdown voltage. This component is suitable only for applications where the reduced voltage rating is acceptable and the increased current capacity provides design benefit.

All recommended substitutes maintain SOT-23-3 package compatibility, surface mount mounting type, and 150°C maximum operating temperature. Selection should prioritize active product status and compliance certifications appropriate to the application environment.

Frequently Asked Questions (FAQ)

Q: Can BC856A-7-F replace BC 856A E6327 in all applications?

A: BC856A-7-F maintains identical electrical specifications for collector current (100 mA), collector-emitter breakdown voltage (65 V), VCE saturation (650 mV), and DC current gain (125 minimum). The transition frequency of 200 MHz is lower than the original 250 MHz specification. Substitution is valid for applications where the 200 MHz frequency is sufficient. Both components use SOT-23-3 packaging and are surface mount compatible.

Q: What is the difference between BC856ALT1G and SBC856ALT1G?

A: Both parts are manufactured by onsemi with identical electrical specifications: 100 mA collector current, 65 V breakdown voltage, 100 MHz transition frequency, and 300 mW power dissipation. The primary difference is packaging format: BC856ALT1G is supplied in Cut Tape & Digi-Reel format, while SBC856ALT1G is supplied in Tape & Reel format. SBC856ALT1G carries AEC-Q101 automotive qualification. Selection depends on packaging requirements and whether automotive qualification is necessary.

Q: Why is BC807-40-7-F listed as a substitute if it has different voltage and current ratings?

A: BC807-40-7-F is designated as a manufacturer-recommended substitute in the provided data. It operates at 45 V collector-emitter breakdown voltage (lower than 65 V) and 500 mA collector current (higher than 100 mA). This component is suitable only for applications where the reduced voltage rating does not exceed circuit requirements and where the increased current capacity is beneficial or neutral. Direct substitution is not recommended without circuit analysis.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed carry RoHS3 compliance status. The original BC 856A E6327 (Infineon) does not specify RoHS status in the provided data. All substitute parts maintain REACH Unaffected status and EAR99 export classification.

Q: What is the significance of the DC current gain difference between BC856A and BC856B variants?

A: BC856A variants specify a minimum DC current gain (hFE) of 125 at 2 mA collector current and 5 V collector-emitter voltage. BC856B variants specify a minimum of 220 at the same conditions. The higher gain in BC856B provides increased amplification per unit base current, allowing for reduced base drive requirements in circuit designs. Both maintain identical voltage and current ratings. Selection depends on circuit design requirements for current gain.

Q: Can I use BC856,215 (Nexperia) as a direct replacement for BC 856A E6327?

A: BC856,215 maintains identical electrical specifications: 100 mA collector current, 65 V breakdown voltage, 650 mV VCE saturation, and 125 minimum DC current gain. The transition frequency is 100 MHz (lower than the original 250 MHz). Both use SOT-23-3 packaging and surface mount mounting. Substitution is valid for applications where 100 MHz transition frequency is acceptable. BC856,215 is active product with AEC-Q101 automotive qualification and RoHS3 compliance.

Q: What packaging formats are available for BC856A substitutes?

A: Substitute parts are available in three packaging formats: Cut Tape & Digi-Reel (BC856,215, BC856ALT1G, BC807-40-7-F, BC856B,215), Tape & Reel (BC856A,215, BC856A-7-F, BC856A-TP, SBC856ALT1G, BC856B-7-F), and unspecified format (BC856B,235). All maintain SOT-23-3 or equivalent package type compatibility. Selection depends on procurement and assembly process requirements.

Q: Are substitute parts suitable for automotive applications?

A: Multiple substitute parts carry AEC-Q101 automotive qualification: BC856,215, BC856A,215, SBC856ALT1G, BC856B,215, BC856B,235, and BC856B-7-F. These components are suitable for automotive applications. Non-automotive-qualified alternatives are also available for non-automotive applications. Automotive qualification status should be verified against specific application requirements.

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