BCX70G-TP Equivalent & Substitute Parts

Part Overview

The BCX70G-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a 45 V collector-emitter breakdown voltage, 200 mA maximum collector current, and 250 MHz transition frequency in a surface mount SOT-23 package. The BCX70G-TP is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives with comparable or enhanced electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Max)	200	mA
Collector-Emitter Breakdown Voltage (Max)	45	V
Power Dissipation (Max)	250	mW
Transition Frequency	250	MHz
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BCX70G-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Transistor type: NPN
Collector current rating: minimum 200 mA
Collector-emitter breakdown voltage: minimum 45 V
Package compatibility: SOT-23-3 (TO-236-3, SC-59)
Mounting type: Surface Mount
Operating temperature range: -55°C to 150°C minimum

Secondary Compatibility Factors:

Power dissipation: 250 mW or greater
Transition frequency: 250 MHz or greater
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (Active Status) Parts that maintain identical or superior electrical specifications with active product status. BCX70J-TP from Micro Commercial Co is a direct equivalent with enhanced DC current gain (250 @ 2mA, 5V versus 120 @ 2mA, 5V) and active product status.

Category 2: Functional Alternatives (Enhanced Specifications) Parts that exceed the BCX70G-TP specifications in one or more parameters while maintaining compatibility with the primary substitution criteria. MMBT6428LT1G from onsemi provides superior transition frequency (700 MHz) and equivalent current/voltage ratings. Toshiba 2SC2712 series devices provide active status with slightly reduced current ratings (150 mA) but higher breakdown voltage (50 V).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) [mA]	Vce(br) (Max) [V]	Power (Max) [mW]	fT [MHz]	hFE (Min) @ Ic, Vce	Package	Status
BCX70G-TP	Micro Commercial Co	200	45	250	250	120 @ 2mA, 5V	SOT-23-3	Obsolete
BCX70J-TP	Micro Commercial Co	200	45	250	250	250 @ 2mA, 5V	SOT-23-3	Active
MMBT6428LT1G	onsemi	200	50	225	700	250 @ 100µA, 5V	SOT-23-3	Active
TBC847B,LM	Toshiba Semiconductor and Storage	150	50	320	100	200 @ 2mA, 5V	SOT-23-3	Active
2SC2712-Y,LF	Toshiba Semiconductor and Storage	150	50	150	80	120 @ 2mA, 6V	SOT-23-3	Active
2SC2712-GR,LF	Toshiba Semiconductor and Storage	150	50	150	80	70 @ 2mA, 6V	SOT-23-3	Active
2SC2712-BL,LF	Toshiba Semiconductor and Storage	150	50	150	80	70 @ 2mA, 6V	SOT-23-3	Active
2SC2712-OTE85LF	Toshiba Semiconductor and Storage	150	50	150	80	70 @ 2mA, 6V	SOT-23-3	Active

Engineering Selection Recommendations

Recommended Primary Substitute: BCX70J-TP

BCX70J-TP is the preferred substitute for BCX70G-TP applications. Both parts are manufactured by Micro Commercial Co and share identical electrical specifications with the exception of DC current gain (hFE), which is enhanced in the BCX70J-TP variant (250 versus 120 at 2mA, 5V). BCX70J-TP maintains active product status, ensuring long-term availability and supply chain continuity. The part is ROHS3 compliant with MSL 1 rating, matching the original specification. Packaging is identical (SOT-23-3), requiring no PCB layout modifications.

Secondary Substitute: MMBT6428LT1G

MMBT6428LT1G from onsemi is suitable for applications where enhanced high-frequency performance is beneficial. This part exceeds the BCX70G-TP in transition frequency (700 MHz versus 250 MHz) while maintaining equivalent collector current (200 mA) and superior breakdown voltage (50 V versus 45 V). Power dissipation is slightly reduced (225 mW versus 250 mW), which is acceptable for most general-purpose switching applications. MMBT6428LT1G is active status with ROHS3 compliance and MSL 1 rating. Package compatibility is maintained (SOT-23-3).

Tertiary Substitutes: Toshiba 2SC2712 Series

The Toshiba 2SC2712 series (2SC2712-Y,LF, 2SC2712-GR,LF, 2SC2712-BL,LF, 2SC2712-OTE85LF) provides active alternatives with enhanced breakdown voltage (50 V). These parts are suitable for applications where the 200 mA collector current requirement can be reduced to 150 mA. All variants are ROHS3 compliant with MSL 1 rating and SOT-23-3 package compatibility. Packaging options vary (Cut Tape & Digi-Reel, Tape & Reel, TO-236), allowing selection based on procurement requirements.

Tertiary Substitute: TBC847B,LM

TBC847B,LM from Toshiba Semiconductor and Storage is an alternative for applications with reduced current requirements (150 mA maximum). This part offers enhanced power dissipation capability (320 mW) and higher breakdown voltage (50 V). Transition frequency is lower (100 MHz) compared to the BCX70G-TP, making it suitable for lower-frequency switching applications. ROHS3 compliance and MSL 1 rating are maintained. Package is SOT-23-3 with Cut Tape & Digi-Reel packaging.

Frequently Asked Questions (FAQ)

Q: Can BCX70J-TP be used as a direct replacement for BCX70G-TP without circuit modifications?

A: Yes. BCX70J-TP is a direct replacement. Both parts share identical voltage, current, and frequency specifications. The enhanced DC current gain in BCX70J-TP (250 versus 120) is a performance improvement that does not require circuit changes. Package, pinout, and operating temperature range are identical.

Q: What is the primary difference between BCX70G-TP and MMBT6428LT1G?

A: The primary difference is transition frequency. MMBT6428LT1G operates at 700 MHz compared to 250 MHz for BCX70G-TP. Both parts support 200 mA collector current and are housed in SOT-23-3 packages. MMBT6428LT1G has slightly higher breakdown voltage (50 V versus 45 V) and marginally lower power dissipation (225 mW versus 250 mW). MMBT6428LT1G is preferred for high-frequency applications.

Q: Why do the Toshiba 2SC2712 series parts have lower collector current ratings (150 mA versus 200 mA)?

A: The 2SC2712 series is a different device family with different internal design specifications. While collector current is reduced to 150 mA, breakdown voltage is increased to 50 V. These parts are suitable for applications where the 200 mA rating is not required. Selection depends on specific circuit current demands.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The BCX70G-TP is also ROHS3 compliant, and all active alternatives maintain this compliance status.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity level?

A: MSL 1 indicates unlimited shelf life without moisture control requirements. All parts listed, including BCX70G-TP and all substitutes, have MSL 1 rating. This means standard storage conditions are acceptable without special desiccant packaging or baking procedures prior to assembly.

Q: Can TBC847B,LM be used in applications requiring 200 mA collector current?

A: No. TBC847B,LM has a maximum collector current rating of 150 mA. Use of this part in circuits requiring 200 mA operation would exceed the device rating. For 200 mA applications, use BCX70J-TP or MMBT6428LT1G.

Q: What packaging options are available for the Toshiba 2SC2712 series?

A: The 2SC2712 series is available in multiple packaging formats: Cut Tape & Digi-Reel (2SC2712-Y,LF and 2SC2712-GR,LF), Tape & Reel (2SC2712-BL,LF and 2SC2712-OTE85LF). Selection depends on procurement and assembly requirements. All variants use SOT-23-3 package with identical electrical specifications.

Q: Is the BCX70G-TP still available for purchase?

A: BCX70G-TP is classified as obsolete. While limited inventory may be available from distributors, long-term supply is not guaranteed. BCX70J-TP is the recommended active alternative from the same manufacturer.

Q: What is the operating temperature range for all substitute parts?

A: BCX70J-TP and MMBT6428LT1G support -55°C to 150°C operating range, matching the BCX70G-TP. Toshiba 2SC2712 series and TBC847B,LM have maximum operating temperatures of 125°C and 150°C respectively. For applications requiring full -55°C to 150°C range, use BCX70J-TP or MMBT6428LT1G.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message