FMA7AT148

Overview

The FMA7AT148 is a dual pre-biased NPN transistor array manufactured by ROHM Semiconductor. It integrates two NPN transistors with built-in biasing resistors in an SMT5 (SOT-753) surface-mount package. The device supports a collector-emitter voltage of 50V and a continuous collector current of 100mA. Key electrical parameters include a base input resistance of 4.7 kOhms, an emitter-base resistance of 10 kOhms, and a minimum DC current gain of 30 at 10mA and 5V. The saturation voltage is specified as 300mV at 500µA base current and 10mA collector current. It features a transition frequency of 250MHz, a maximum power dissipation of 300mW, and operates up to a junction temperature of +150°C.

Feature Summary

• Integrates two NPN transistors with fixed internal biasing resistors for simplified circuit design.
• Provides high-speed switching capability with a transition frequency of 250MHz.
• Utilizes a compact SMT5 surface-mount package suitable for space-constrained applications.

Applications

• General-purpose signal switching and logic interface circuits
• Driver stages for low-power loads in consumer electronics
• Level shifting between different voltage domains in digital systems

Procurement Notes

Verify the specific suffix T148 against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure the ordering quantity aligns with standard reel sizes if bulk procurement is required. Cross-reference the part number with authorized distributors to confirm current availability and lead times before finalizing supply chain plans.

Selection Notes

Select this component when a dual NPN configuration with integrated biasing is required to reduce external component count. Compare the 4.7kOhm base resistance against application requirements to ensure adequate drive current. Verify that the 50V voltage rating and 100mA current capacity exceed the maximum expected load conditions for reliable operation.

Part Context

This part belongs to the FMA series of pre-biased transistors from ROHM Semiconductor. It serves as a discrete alternative to complex transistor arrays, offering a compact solution for dual-channel switching needs. The SMT5 package allows for automated surface-mount assembly, integrating well with modern PCB manufacturing processes for small form-factor devices.

Replacement Considerations

The DTA143XE is listed as a similar product in available documentation. Verify pinout compatibility and electrical parameter alignment before substitution. Check for any differences in packaging or thermal characteristics that may affect board layout and heat dissipation performance.