SMUN2230T1G

Overview

The SMUN2230T1G is an NPN Bias Resistor Transistor (BRT) from onsemi, integrating a single transistor with a monolithic bias network consisting of two resistors: a series base resistor and a base-emitter resistor. This configuration replaces discrete components to reduce board space and system cost. The device operates within a collector-emitter voltage range of 50 Vdc and supports continuous collector currents up to 100 mAdc. It features a typical input resistance of 1 kOhm and a resistor ratio of 1.0. Packaged in the SC-59 format, it functions reliably across a junction temperature range of -55°C to +150°C.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias network containing series base and base-emitter resistors to eliminate external components.
• Designed to simplify circuit design by reducing overall component count and minimizing printed circuit board area requirements.
• Manufactured using lead-free processes that are halogen-free and compliant with RoHS standards.

Applications

• Replacing discrete transistor and resistor networks in digital logic interface circuits
• Driver stages for low-power switching applications requiring simplified biasing
• Automotive electronics utilizing AEC-Q101 qualified variants

Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to confirm package type and shipping quantity. Confirm RoHS compliance status and Pb-Free marking requirements for the target assembly process. Ensure the SC-59 package dimensions align with the intended PCB footprint before finalizing procurement orders.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required for digital switching. Verify that the 1 kOhm input resistance matches the driving source impedance. Consider the thermal dissipation limits relative to the ambient operating conditions and ensure the 50 V collector-emitter rating exceeds the maximum circuit voltage.

Part Context

This part belongs to the MUN2230 family of digital transistors, which includes variants such as MMUN2230LT1G and MUN5230T1G. These devices share identical electrical characteristics but differ in physical packaging, including SOT-23, SC-70/SOT-323, and SC-75 formats. The family is designed to provide standardized biasing solutions across various form factors.

Replacement Considerations

Direct functional equivalents include MMUN2230LT1G (SOT-23), MUN5230T1G (SC-70/SOT-323), and DTC113EET1G (SC-75). Cross-referencing pinouts and thermal characteristics is necessary when substituting between different package styles within the same electrical family.

FAQ

What is the internal resistor configuration for the SMUN2230T1G?

The device contains a monolithic bias network with a series base resistor (R1) and a base-emitter resistor (R2), both having a typical value of 1 kOhm.

Is the SMUN2230T1G suitable for automotive applications?

Yes, variants with the 'S' or 'NSV' prefix are AEC-Q101 qualified and PPAP capable, making them suitable for automotive and other high-reliability applications.

What is the maximum collector-emitter voltage rating?

The maximum collector-emitter voltage (VCEO) is rated at 50 Vdc under standard operating conditions.