BC856AMTF Equivalent & Substitute Parts

Part Overview

The BC856AMTF is a PNP bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications in surface mount configurations. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing production and maintenance requirements. The BC856AMTF operates at a maximum collector current of 100 mA with a collector-emitter breakdown voltage of 65 V, making it suitable for low-power signal processing circuits. Active equivalent parts are available from multiple manufacturers, ensuring design continuity and supply chain flexibility.

Key Parameters

Parameter	Value	Unit
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
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 2 mA, 5 V	—
Power - Max	310	mW
Frequency - Transition	150	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC856AMTF is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

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
DC Current Gain (hFE) (Min) @ Ic, Vce: ≥110 @ 2 mA, 5 V
Mounting Type: Surface Mount
Package / Case: TO-236-3, SC-59, SOT-23-3

Acceptable Variation Parameters:

Power - Max: 250 mW to 310 mW (all substitutes meet or exceed minimum power dissipation requirements)
Frequency - Transition: 100 MHz to 200 MHz (all substitutes support minimum 100 MHz operation)
Operating Temperature: Minimum junction temperature of 150°C (substitutes with extended range -55°C to 150°C are acceptable)
Product Status: Active substitutes are preferred over obsolete parts
RoHS Compliance: ROHS3 compliant substitutes are acceptable

Substitute parts are grouped by manufacturer and product line. All listed substitutes maintain electrical and mechanical compatibility with the BC856AMTF within the specified parameter ranges.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	hFE (Min) @ 2mA, 5V	Power (Max) mW	Freq (Transition) MHz	Temp Range °C	Package	Status
BC856AMTF	onsemi	100	65	110	310	150	—/150	SOT-23-3	Obsolete
BC856ALT1G	onsemi	100	65	125	300	100	-55/150	SOT-23-3	Active
BC856BLT1G	onsemi	100	65	220	300	100	-55/150	SOT-23-3	Active
BC856BLT3G	onsemi	100	65	220	300	100	-55/150	SOT-23-3	Active
SBC856ALT1G	onsemi	100	65	125	300	100	-55/150	SOT-23-3	Active
SBC856BLT1G	onsemi	100	65	220	300	100	-55/150	SOT-23-3	Active
SBC856BLT3G	onsemi	100	65	220	300	100	-55/150	SOT-23-3	Active
BC856,215	Nexperia USA Inc.	100	65	125	250	100	—/150	TO-236AB	Active
BC856A RFG	Taiwan Semiconductor Corporation	100	65	125	200	100	-55/150	SOT-23	Active
BC856A,215	Nexperia USA Inc.	100	65	125	250	100	—/150	TO-236AB	Active
BC856A-7-F	Diodes Incorporated	100	65	125	300	200	-65/150	SOT-23-3	Active

Engineering Selection Recommendations

Primary Substitutes (onsemi BC856 Series):

The BC856ALT1G, BC856BLT1G, and BC856BLT3G from onsemi are direct functional equivalents with active product status. These parts maintain identical electrical specifications for collector current, breakdown voltage, and saturation characteristics. The BC856BLT variants offer higher DC current gain (220 vs. 110), which provides improved switching performance in applications requiring higher gain margins. All onsemi substitutes are ROHS3 compliant and carry unlimited moisture sensitivity rating.

Automotive-Grade Alternatives (SBC856 Series):

The SBC856ALT1G, SBC856BLT1G, and SBC856BLT3G are automotive-qualified variants (AEC-Q101) manufactured by onsemi. These parts are suitable for applications requiring automotive-grade reliability and traceability. Electrical parameters are identical to their non-automotive counterparts, with the addition of automotive qualification documentation.

Alternative Manufacturers:

Nexperia USA Inc. provides BC856,215 and BC856A,215 variants in TO-236AB package configuration. These parts maintain electrical equivalence with the BC856AMTF and carry AEC-Q101 automotive qualification. Power dissipation is rated at 250 mW, which remains within acceptable operating margins for most applications.

Taiwan Semiconductor Corporation offers BC856A RFG with extended temperature range (-55°C to 150°C). This variant is suitable for applications requiring lower operating temperature performance.

Diodes Incorporated provides BC856A-7-F with the highest transition frequency (200 MHz) and extended temperature range (-65°C to 150°C), offering enhanced performance for high-frequency applications.

Selection Criteria:

For standard applications: BC856ALT1G or BC856BLT1G (onsemi, active status, extended temperature range)
For automotive applications: SBC856BLT1G or SBC856BLT3G (AEC-Q101 qualified)
For high-frequency applications: BC856A-7-F (200 MHz transition frequency)
For extended low-temperature operation: BC856A-7-F (-65°C minimum)

Frequently Asked Questions (FAQ)

Q: Can BC856ALT1G directly replace BC856AMTF in existing designs?

A: Yes. The BC856ALT1G maintains electrical equivalence across all critical parameters: 100 mA collector current, 65 V breakdown voltage, 650 mV saturation voltage, and SOT-23-3 package compatibility. The higher DC current gain (125 vs. 110) is within acceptable design margins and does not require circuit modification.

Q: What is the difference between BC856BLT1G and BC856ALT1G?

A: Both parts are manufactured by onsemi and share identical electrical specifications except for DC current gain. BC856BLT1G specifies a minimum hFE of 220 at 2 mA and 5 V, compared to 125 for BC856ALT1G. The higher gain of the BLT variant provides improved switching speed and reduced base drive requirements in switching applications.

Q: Are SBC856 automotive variants electrically equivalent to standard BC856 parts?

A: Yes. SBC856ALT1G and SBC856BLT1G are electrically identical to their BC856 counterparts. The "S" prefix indicates automotive-grade qualification (AEC-Q101) and enhanced traceability documentation. Electrical performance and package compatibility are maintained.

Q: Can I use BC856A RFG as a substitute if my application operates below 0°C?

A: Yes. BC856A RFG is rated for -55°C to 150°C junction temperature operation, extending the lower operating limit compared to the BC856AMTF. All electrical parameters remain equivalent within the specified temperature range.

Q: What is the significance of the TO-236AB package designation used by Nexperia parts?

A: TO-236AB is the industry standard designation for the three-lead surface mount package equivalent to SOT-23-3. BC856,215 and BC856A,215 from Nexperia are mechanically and electrically compatible with SOT-23-3 packaged parts. Pin configuration and lead spacing are identical.

Q: Why does BC856A-7-F from Diodes Incorporated specify 200 MHz transition frequency?

A: BC856A-7-F is manufactured with process parameters optimized for higher-frequency operation. The 200 MHz transition frequency (compared to 100-150 MHz for other variants) makes this part suitable for applications requiring faster switching speeds or higher-frequency signal processing. All other electrical specifications remain equivalent.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The BC856AMTF, being obsolete, does not carry ROHS3 designation. All active alternatives meet current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these transistors?

A: All listed parts, including the BC856AMTF and all substitutes, carry MSL 1 (Unlimited) rating. This indicates unlimited shelf life without moisture bake-out requirements prior to soldering, simplifying inventory management and assembly processes.

Q: Can I mix different BC856 variants in the same production run?

A: Yes, provided the application design accommodates the range of DC current gain specifications. If the circuit is designed for hFE ≥110, all variants are interchangeable. If the design requires specific gain matching, parts should be selected from the same hFE group (ALT variants at 125 or BLT variants at 220).

Q: Which substitute offers the best performance for high-temperature applications?

A: All listed substitutes are rated to 150°C junction temperature, matching the BC856AMTF specification. For applications requiring extended high-temperature operation, all parts are equivalent. No substitute offers superior high-temperature performance beyond 150°C.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message