onsemi MSC2712GT1

Overview

MSC2712GT1 from onsemi is an NPN general-purpose amplifier transistor in SC-59 (SOT-23) package, rated for V(BR)CEO = 50 V, IC = 100 mA continuous, hFE = 200–400 at IC = 2 mA, fT = 50 MHz, and PD = 200 mW - used in low-power signal amplification and switching circuits in consumer audio preamps and sensor interface stages.

For engineers reviewing the MSC2712GT1 datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain range, VCE(sat) ≤ 0.5 V at IC/IB = 10, thermal limit of TJ = 150°C, and Pb-free SC-59 packaging compliance with RoHS and MSL Level 1.

Technical Context

This NPN bipolar junction transistor operates in common-emitter configuration with guaranteed hFE binning (G = 200–400, Y = 120–240), supports linear amplification up to 50 MHz fT, and maintains stable ICEO ≤ 0.1 A at VCE = 10 V and TA = 25°C.

Its safe operating area (SOA) is defined for single-pulse operation up to 100 ms at TA = 25°C, with V(BR)CBO = 60 V and V(BR)EBO = 7.0 V ensuring robust voltage blocking across all junctions under bias.

Key Specifications

Pinout & Package

Package: SC-59 (SOT-23), case outline 318D, dimensions 2.90 × 1.50 × 1.15 mm, 3-pin surface-mount with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Compared with MSC2712GT1, MMBT2222ALT1G trades voltage headroom and gain stability for speed, while BC847B,215 offers comparable gain and improved power handling in a functionally aligned SOT-23 NPN transistor - both require validation of VCEO margin and thermal layout in target applications.

Availability

MSC2712GT1 is available at Aetrix Electronics and suitable for audio pre-amplifier stages, sensor signal conditioning, and low-power switching load drivers requiring stable component supply and RoHS-compliant manufacturing.

Supply support for MSC2712GT1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MSC2712GT1 belongs to onsemi's general-purpose bipolar transistor product line, designed for cost-sensitive, low-power linear amplification and switching in space-constrained surface-mount applications.

FAQ

What is the maximum collector-emitter voltage rating for MSC2712GT1?

The MSC2712GT1 has a guaranteed minimum V(BR)CEO of 50 Vdc at IC = 2.0 mAdc and IB = 0. This defines the absolute upper limit for collector-to-emitter voltage before avalanche breakdown occurs. Operation above this rating risks irreversible device damage, especially under sustained bias or elevated temperature conditions. The MSC2712GT1 must be used within this limit in all circuit configurations.

Is MSC2712GT1 suitable for new designs?

No - the MSC2712GT1 is marked as discontinued by onsemi and not recommended for new designs. While Aetrix Electronics maintains limited legacy stock, engineers should evaluate alternatives such as BC847B,215 or MMBT2222ALT1G for long-term supply assurance. The MSC2712GT1 datasheet remains valid for existing designs undergoing maintenance or repair.

What does the "G" suffix in MSC2712GT1G indicate?

The "G" suffix in MSC2712GT1G denotes a Pb-free, RoHS-compliant package per onsemi's standard marking convention. It confirms compliance with lead-free soldering processes and environmental regulations. The "G" does not indicate performance binning - that is determined by the middle character ("G" vs "Y") which specifies hFE group: MSC2712GT1G = 200–400, MSC2712YT1G = 120–240.

What is the thermal resistance (θJA) of MSC2712GT1 in SC-59 package?

While not explicitly listed in the datasheet, the typical junction-to-ambient thermal resistance θJA for the SC-59 (SOT-23) package is approximately 625°C/W under standard JEDEC test conditions (single-layer 1-in² copper pad). For the MSC2712GT1, this implies a 200 mW power dissipation limit drops to ~120 mW at 70°C ambient - requiring careful thermal design in enclosed or high-temperature environments.

How is the pinout configured for MSC2712GT1 in SC-59 package?

The MSC2712GT1 uses Style 1 pinout for SC-59: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This matches standard SOT-23 NPN orientation and is confirmed in the mechanical drawing (CASE 318D, STYLE 1). Misalignment during PCB layout or assembly will result in functional failure - always verify footprint polarity against the onsemi package outline diagram before release.