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Product Detailed Parameters
- Description：TRANS PREBIAS NPN SC70-3
- Series：*
- Mfr：onsemi
- Package：Bulk
- Resistors Included：-
- Transistor Type：-
- Current - Collector (Ic) (Max)：-
- Voltage - Collector Emitter Breakdown (Max)：-
- Resistor - Base (R1)：-
- Resistor - Emitter Base (R2)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- Frequency - Transition：-
- Power - Max：-
- Grade：-
- Qualification：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
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Overview
The SMUN5211T1 is an NPN Bias Resistor Transistor (BRT) manufactured by onsemi, housed in a SOT-323 (SC-70) surface-mount package. It integrates a single transistor with a monolithic bias network consisting of two resistors: a series base resistor and a base-emitter resistor. Key electrical parameters include a maximum DC collector current of 100 mA, a maximum collector-emitter voltage of 50 V, and a typical input resistance of 22 kΩ. The device features a typical resistor ratio of 1, a maximum power dissipation of 310 mW, and operates at temperatures up to +150 °C.
Feature Summary
- Integrates a single NPN transistor with a monolithic bias network containing series base and base-emitter resistors to replace discrete components.
- Designed for low-power surface mount applications where board space is limited.
- Simplifies circuit design by eliminating the need for external resistor bias networks.
Applications
- Low power surface mount applications requiring compact component footprints.
- Digital switching circuits utilizing pre-biased transistor configurations.
- High density printed circuit boards where space optimization is critical.
Procurement Notes
Verify the specific suffix 'T1' against official datasheets to confirm tape and reel packaging specifications. Ensure compatibility with SOT-323 footprint dimensions during PCB layout. Cross-reference manufacturer part numbers with authorized distributors to confirm authenticity and avoid counterfeit components.
Selection Notes
Select this component when a single NPN BRT with a 22 kΩ input resistance and 50 V rating is required. Compare internal resistor values against application requirements to ensure proper biasing. Consider the SOT-323 package size constraints relative to available board real estate.
Part Context
This component belongs to the MUN521x series of digital transistors from onsemi. These devices are designed to simplify circuit designs by integrating bias resistors directly with the transistor die. The series offers various resistor ratios and configurations to suit different logic interface needs.
Replacement Considerations
Compatible substitutes include the MUN5211T1G and other NPN BRTs with identical 22 kΩ/22 kΩ resistor networks and SOT-323 packaging. Verify pinout alignment and thermal characteristics before substitution.
