FMG4AT148

Overview

The FMG4AT148 is a dual NPN pre-biased digital transistor manufactured by ROHM Semiconductor. It integrates two NPN transistors with built-in bias resistors in an SMT5 (SC-74A/SOT-753) surface-mount package. Key electrical specifications include a collector-emitter voltage (VCEO) of 50 V, a continuous collector current of 100 mA, and a power dissipation rating of 300 mW. The device features a typical base input resistance of 10 kOhms and a minimum DC current gain (hFE) of 100 at 1 mA and 5 V. It operates within a temperature range of -55°C to +150°C and has a transition frequency of 250 MHz.

Feature Summary

• Integrates two NPN transistors with built-in bias resistors for simplified circuit design.
• Provides high DC current gain to ensure reliable switching performance.
• Supports high-frequency operation with a transition frequency of 250 MHz.
• Utilizes a compact SMT5 surface-mount package for space-constrained applications.

Applications

• General-purpose switching circuits
• Driver circuits for logic interfaces
• Signal level shifting applications

Procurement Notes

Verify the specific ordering suffix and packaging configuration when sourcing, as availability may vary between reel, cut tape, or Digi-Reel formats. Confirm RoHS compliance status and check for any end-of-life notifications, as component lifecycle status can impact long-term supply chain stability. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when a dual NPN configuration with integrated biasing is required to reduce external component count. The 10 kOhm base resistor value suits standard logic interface applications. Consider the 50 V voltage rating and 100 mA current limit to ensure adequate headroom for the target load conditions. Verify thermal management requirements given the 300 mW power dissipation limit in the small outline package.

Part Context

The FMG4AT148 belongs to the FMG4 series of pre-biased transistors from ROHM Semiconductor. This series is designed to replace discrete resistor-transistor combinations, simplifying PCB layout and reducing assembly costs. The SMT5 package offers a compact footprint suitable for modern consumer electronics and industrial control systems requiring efficient signal processing components.

Replacement Considerations

Direct substitutes should match the dual NPN configuration, 50 V VCEO, 100 mA Ic, and 10 kOhm base resistance. Verify pinout compatibility with the SMT5/SC-74A package to ensure mechanical interchangeability without redesigning the footprint.