Equivalent & Substitute Parts for 2SC2412KT246R

Part Overview

The 2SC2412KT246R is an NPN bipolar junction transistor manufactured by Rohm Semiconductor, designed for surface mount applications in the SOT-23-3 package. This component operates at a maximum collector current of 150 mA, collector-emitter breakdown voltage of 50 V, and maximum power dissipation of 200 mW. The device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within defined parameter tolerances.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	150	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Vce Saturation (Max)	400 mV @ 5 mA, 50 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min	180 @ 1 mA, 6V	—
Power - Max	200	mW
Frequency - Transition	180	MHz
Operating Temperature (TJ)	150	°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

Substitution of the 2SC2412KT246R is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Collector current rating must be ≥150 mA
Collector-emitter breakdown voltage must be ≥50 V
Maximum power dissipation must be ≥200 mW
DC current gain (hFE) must support the intended bias conditions
Transition frequency must be sufficient for the application bandwidth

Mechanical Compatibility Criteria:

Package must be surface mount in SOT-23-3, SC-59, or TO-236-3 configuration
Moisture sensitivity level must be ≤1 (MSL-1)
RoHS compliance status must be maintained

Substitution Categories:

Parametric Equivalent: Parts with identical electrical specifications and active product status. The 2SC2412KT146R from Rohm Semiconductor meets all electrical parameters of the main part while offering active availability and improved packaging options (Cut Tape & Digi-Reel).

Direct Manufacturer Equivalent: The 2DC2412R-7 from Diodes Incorporated provides identical electrical performance with enhanced power rating (300 mW vs. 200 mW) and extended operating temperature range, maintaining full compatibility.

Similar Performance Substitutes: Parts including 2SC2412-R-TP, 2SC2412-R-TP-HF, and Toshiba 2SC2712 variants offer compatible electrical operation within acceptable parameter ranges. These parts may exhibit variations in transition frequency (150 MHz or 80 MHz), DC current gain, or saturation voltage characteristics while maintaining functional equivalence for most applications.

Cross-Manufacturer Alternatives: BC847A RFG and BC847B RFG from Taiwan Semiconductor Corporation provide NPN performance in compatible packages, though with reduced collector current (100 mA) and collector-emitter breakdown voltage (45 V), suitable only for applications with lower current and voltage requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce(br) V	Power mW	hFE Min	fT MHz	Package	Temp Range °C
2SC2412KT246R	Rohm Semiconductor	Obsolete	150	50	200	180	180	SOT-23-3	0 to 150
2SC2412KT146R	Rohm Semiconductor	Active	150	50	200	180	180	SOT-23-3	0 to 150
2DC2412R-7	Diodes Incorporated	Active	150	50	300	180	180	SOT-23-3	-55 to 150
2SC2412-R-TP	Micro Commercial Co	Active	150	50	200	120	150	SOT-23-3	-55 to 150
2SC2412-R-TP-HF	Micro Commercial Co	Active	150	50	200	120	150	SOT-23-3	-55 to 150
2SC2712-BL,LF	Toshiba Semiconductor	Active	150	50	150	70	80	SOT-23-3	0 to 125
2SC2712-GR,LF	Toshiba Semiconductor	Active	150	50	150	70	80	SOT-23-3	0 to 125
2SC2712-OTE85LF	Toshiba Semiconductor	Active	150	50	150	70	80	SOT-23-3	0 to 125
2SC2712-Y,LF	Toshiba Semiconductor	Active	150	50	150	120	80	SOT-23-3	0 to 125
BC847A RFG	Taiwan Semiconductor	Active	100	45	200	110	100	SOT-23-3	-55 to 150
BC847B RFG	Taiwan Semiconductor	Active	100	45	200	200	100	SOT-23-3	-55 to 150

Engineering Selection Recommendations

Primary Recommendation: 2SC2412KT146R

The 2SC2412KT146R from Rohm Semiconductor is the direct parametric equivalent of the obsolete 2SC2412KT246R. This part maintains identical electrical specifications across all critical parameters: 150 mA collector current, 50 V breakdown voltage, 200 mW power rating, 180 MHz transition frequency, and 180 minimum DC current gain. The part is in active production status with substantial inventory availability (1,000,300 pieces). Packaging options include Cut Tape and Digi-Reel formats, providing flexibility for both prototype and production environments. RoHS3 compliance and MSL-1 moisture sensitivity rating ensure regulatory conformance and handling compatibility with existing supply chain processes.

Secondary Recommendation: 2DC2412R-7

The 2DC2412R-7 from Diodes Incorporated provides direct electrical compatibility with enhanced specifications. The 300 mW power rating exceeds the original 200 mW specification, offering additional thermal margin. Extended operating temperature range (-55°C to 150°C) accommodates wider environmental conditions. This part is actively produced with 4,400 pieces in stock. The SOT-23-3 package maintains mechanical compatibility. Selection of this part is appropriate when thermal performance or extended temperature operation is required.

Tertiary Recommendations: Toshiba 2SC2712 Series

The Toshiba 2SC2712 variants (2SC2712-BL,LF, 2SC2712-GR,LF, 2SC2712-OTE85LF, 2SC2712-Y,LF) maintain the critical electrical parameters of 150 mA collector current and 50 V breakdown voltage. These parts operate at reduced transition frequency (80 MHz vs. 180 MHz) and lower power dissipation (150 mW vs. 200 mW). Selection is appropriate for applications where bandwidth requirements are less stringent than the original design specification. The 2SC2712-Y,LF variant offers DC current gain of 120, providing closer matching to the original hFE specification compared to other 2SC2712 variants.

Limited Compatibility: BC847 Series

The BC847A RFG and BC847B RFG from Taiwan Semiconductor Corporation operate at reduced collector current (100 mA vs. 150 mA) and collector-emitter breakdown voltage (45 V vs. 50 V). These parts are suitable only for applications where the original design operates with design margins that accommodate these reduced ratings. The BC847B RFG offers higher DC current gain (200 vs. 180), which may require bias network recalculation.

Frequently Asked Questions (FAQ)

Q: Can the 2SC2412KT146R be used as a direct replacement for the 2SC2412KT246R?

A: Yes. The 2SC2412KT146R is a parametric equivalent with identical electrical specifications. The primary difference is product status: the KT146R is in active production while the KT246R is obsolete. No circuit modifications are required for substitution.

Q: What is the difference between the 2SC2412KT146R and the 2DC2412R-7?

A: Both parts meet the electrical requirements of the original 2SC2412KT246R. The 2DC2412R-7 offers 300 mW power rating (vs. 200 mW) and extended operating temperature range (-55°C to 150°C vs. 0°C to 150°C). The 2DC2412R-7 is manufactured by Diodes Incorporated rather than Rohm Semiconductor. Selection depends on whether enhanced thermal performance or extended temperature operation is required.

Q: Can I use the Toshiba 2SC2712 series as a substitute?

A: The Toshiba 2SC2712 variants maintain compatibility for collector current (150 mA) and breakdown voltage (50 V). However, transition frequency is reduced to 80 MHz (vs. 180 MHz) and power dissipation is limited to 150 mW (vs. 200 mW). Substitution is valid only if the application does not require the higher bandwidth or thermal performance of the original part. Circuit simulation or testing is necessary to confirm performance in bandwidth-critical applications.

Q: Why do the BC847A and BC847B have lower current and voltage ratings?

A: The BC847 series is designed for lower-power applications. The 100 mA collector current and 45 V breakdown voltage represent different design targets. These parts are suitable only for applications where the original design includes sufficient margin to operate within these reduced specifications. Direct substitution without circuit analysis is not recommended.

Q: What packaging options are available for equivalent parts?

A: The 2SC2412KT146R is available in Cut Tape (CT) and Digi-Reel packaging. The 2DC2412R-7 is available in Cut Tape and Digi-Reel. Toshiba 2SC2712 variants are available in Tape & Reel (TR) or Cut Tape formats depending on the specific part number suffix. All parts maintain the SOT-23-3 surface mount package configuration.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance status, ensuring compatibility with RoHS-regulated supply chains and end-use applications.

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

A: The 2SC2412KT146R and 2DC2412R-7 are rated MSL-1 (Unlimited), indicating no moisture sensitivity restrictions. Toshiba 2SC2712 variants are also rated MSL-1. BC847 series parts are rated MSL-1. All parts can be stored and handled without special moisture control measures.

Q: Can I mix different substitute parts in the same production run?

A: Mixing parts from different manufacturers or with different electrical specifications (such as different hFE or transition frequency values) is not recommended without circuit validation. If production continuity requires use of multiple part sources, circuit design should accommodate the parameter ranges of all selected parts, or separate production lots should be maintained with single-source parts.

Q: What is the inventory status of these parts?

A: The 2SC2412KT146R has the highest inventory availability (1,000,300 pieces). The 2SC2712-OTE85LF has 24,385 pieces. The 2DC2412R-7 has 4,400 pieces. BC847B RFG has 20,779 pieces. Inventory levels should be verified with the supplier for current availability, as stock quantities change with production and demand cycles.

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