2SC2712-BL,LF Equivalent & Substitute Parts

Part Overview

The 2SC2712-BL,LF is an NPN bipolar junction transistor manufactured by Toshiba Semiconductor and Storage, designed for surface mount applications in the S-Mini package configuration. This component operates at a maximum collector current of 150 mA with a collector-emitter breakdown voltage of 50 V and a transition frequency of 80 MHz. The part is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical performance parameters within acceptable operational ranges. Substitution becomes necessary when the primary part number reaches end-of-life status, experiences supply constraints, or when alternative packaging formats are required for manufacturing flexibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	150	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Vce Saturation (Max) @ Ib, Ic	250 mV @ 10 mA, 100 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	70 @ 2 mA, 6 V	—
Power - Max	150	mW
Frequency - Transition	80	MHz
Operating Temperature (TJ)	125	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the 2SC2712-BL,LF are categorized into two distinct groups based on electrical parameter alignment and packaging configuration:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: collector current (150 mA), collector-emitter breakdown voltage (50 V), saturation voltage (250 mV @ 10 mA, 100 mA), transition frequency (80 MHz), and power dissipation (150 mW). These parts differ only in packaging format (Cut Tape & Digi-Reel or alternative Tape & Reel configurations) and are direct functional replacements.

Similar Parts operate within the same NPN transistor category but exhibit variations in one or more electrical parameters. These variations include differences in maximum collector current, collector-emitter breakdown voltage, transition frequency, power dissipation, and saturation voltage characteristics. Similar parts are suitable for applications where the primary part's specifications exceed circuit requirements or where enhanced performance characteristics are beneficial.

The key parameters determining substitution eligibility are: transistor type (NPN), maximum collector current, collector-emitter breakdown voltage, saturation voltage, transition frequency, power dissipation rating, and package compatibility (TO-236-3, SC-59, SOT-23-3).

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vce Breakdown (V)	Vce Sat @ Ib, Ic (mV)	fT (MHz)	P Max (mW)	Package	Product Status
2SC2712-BL,LF	Toshiba	150	50	250 @ 10mA, 100mA	80	150	S-Mini (SOT-23-3)	Active
2SC2712-GR,LF	Toshiba	150	50	250 @ 10mA, 100mA	80	150	S-Mini (SOT-23-3)	Active
2SC2712-OTE85LF	Toshiba	150	50	250 @ 10mA, 100mA	80	150	TO-236 (SOT-23-3)	Active
BC847A RFG	Taiwan Semiconductor	100	45	500 @ 5mA, 100mA	100	200	SOT-23 (SOT-23-3)	Active
BC847B RFG	Taiwan Semiconductor	100	45	500 @ 5mA, 100mA	100	200	SOT-23 (SOT-23-3)	Active
BC847C RFG	Taiwan Semiconductor	100	45	500 @ 5mA, 100mA	100	200	SOT-23 (SOT-23-3)	Active
MMBT3904 RFG	Taiwan Semiconductor	200	40	300 @ 5mA, 50mA	250	300	SOT-23 (SOT-23-3)	Active
MMBT3904L RFG	Taiwan Semiconductor	200	40	300 @ 5mA, 50mA	250	300	SOT-23 (SOT-23-3)	Obsolete
MMBT6428LT1G	onsemi	200	50	600 @ 5mA, 100mA	700	225	SOT-23-3 (TO-236)	Active

Engineering Selection Recommendations

Parametric Equivalent Selection (Direct Replacement)

The 2SC2712-GR,LF and 2SC2712-OTE85LF are parametric equivalents of the 2SC2712-BL,LF. Both parts maintain identical electrical specifications and are classified as Active product status. Selection between these options depends on packaging format requirements:

2SC2712-GR,LF: Supplied in Cut Tape & Digi-Reel format, suitable for applications requiring alternative tape configurations
2SC2712-OTE85LF: Supplied in standard Tape & Reel format with higher inventory availability (24,385 units)

Both equivalents carry ROHS3 compliance and unlimited moisture sensitivity rating, matching the original part's environmental certifications.

Similar Part Selection (Performance-Based Substitution)

Similar parts are selected based on application requirements where the 2SC2712-BL,LF specifications exceed circuit demands or where enhanced performance characteristics are required:

BC847A, BC847B, BC847C RFG: These Taiwan Semiconductor parts operate at reduced maximum collector current (100 mA versus 150 mA) and lower collector-emitter breakdown voltage (45 V versus 50 V). All three variants are Active status with ROHS3 compliance. Selection among these variants depends on DC current gain requirements (hFE: 110, 200, and 420 respectively). These parts feature higher transition frequency (100 MHz) and greater power dissipation capability (200 mW).
MMBT3904 RFG: This Taiwan Semiconductor part provides enhanced performance with 200 mA maximum collector current, 250 MHz transition frequency, and 300 mW power dissipation. However, it operates at a lower collector-emitter breakdown voltage (40 V). Active product status with ROHS3 compliance.
MMBT3904L RFG: Identical electrical specifications to MMBT3904 RFG but classified as Obsolete product status. This part carries significantly higher inventory (194,524 units) but should not be selected for new designs due to end-of-life classification.
MMBT6428LT1G: This onsemi part matches the 2SC2712-BL,LF collector-emitter breakdown voltage (50 V) while providing superior performance characteristics: 200 mA collector current, 700 MHz transition frequency, and 225 mW power dissipation. Active product status with ROHS3 compliance and REACH Unaffected designation.

All substitute parts maintain the same package family (TO-236-3, SC-59, SOT-23-3) and surface mount mounting type, ensuring mechanical compatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can 2SC2712-GR,LF be used as a direct replacement for 2SC2712-BL,LF?

A: Yes. The 2SC2712-GR,LF is a parametric equivalent with identical electrical specifications. The only difference is the packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Both parts are Active status with ROHS3 compliance and unlimited moisture sensitivity rating.

Q: What is the difference between parametric equivalents and similar parts?

A: Parametric equivalents maintain identical electrical specifications across all critical parameters (collector current, breakdown voltage, saturation voltage, transition frequency, and power dissipation). Similar parts operate within the same transistor category but exhibit variations in one or more electrical parameters. Similar parts are suitable when the primary part's specifications exceed circuit requirements.

Q: Can BC847 series parts replace the 2SC2712-BL,LF?

A: BC847 series parts (BC847A, BC847B, BC847C RFG) can be used in applications where the reduced maximum collector current (100 mA versus 150 mA) and lower collector-emitter breakdown voltage (45 V versus 50 V) are acceptable. These parts offer higher transition frequency (100 MHz) and greater power dissipation (200 mW). All variants are Active status with ROHS3 compliance.

Q: What are the advantages of MMBT6428LT1G over the 2SC2712-BL,LF?

A: The MMBT6428LT1G provides enhanced performance with matching collector-emitter breakdown voltage (50 V), higher maximum collector current (200 mA), significantly higher transition frequency (700 MHz), and greater power dissipation capability (225 mW). This part is manufactured by onsemi and carries Active product status with ROHS3 compliance.

Q: Should MMBT3904L RFG be selected for new designs?

A: No. Although MMBT3904L RFG has identical electrical specifications to MMBT3904 RFG, it is classified as Obsolete product status. For new designs, select MMBT3904 RFG (Active status) or alternative Active status parts.

Q: Are all substitute parts compatible with existing PCB layouts?

A: Yes. All substitute parts maintain the same package family (TO-236-3, SC-59, SOT-23-3) and surface mount mounting type, ensuring mechanical and footprint compatibility with existing PCB designs.

Q: What compliance certifications do these parts carry?

A: All listed parts carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). MMBT6428LT1G and BC847 series parts additionally carry REACH Unaffected designation. All parts are classified under ECCN EAR99.

Q: How do DC current gain (hFE) variations affect part selection?

A: DC current gain variations among similar parts (BC847A: 110, BC847B: 200, BC847C: 420 at 2 mA, 5 V) determine amplification characteristics. Select the variant matching your circuit's gain requirements. Higher hFE values provide greater amplification but may require different biasing configurations.

Q: Can parts with lower collector-emitter breakdown voltage be used in higher voltage applications?

A: No. Parts with lower breakdown voltage ratings (such as BC847 series at 45 V or MMBT3904 at 40 V) cannot be used in applications requiring the 2SC2712-BL,LF's 50 V rating. Exceeding the breakdown voltage specification will result in component failure. Select parts with equal or higher breakdown voltage ratings for the intended application.

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