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Product Detailed Parameters
- Description：TRANS PREBIAS NPN 50V SSMINI3
- Series：-
- Mfr：Panasonic Electronic Components
- Package：Tape & Reel (TR)
- Resistors Included：R1 and R2
- Transistor Type：NPN - Pre-Biased
- Current - Collector (Ic) (Max)：100 mA
- Voltage - Collector Emitter Breakdown (Max)：50 V
- Resistor - Base (R1)：100 kOhms
- Resistor - Emitter Base (R2)：100 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce：80 @ 5mA, 10V
- Vce Saturation (Max) @ Ib, Ic：250mV @ 300µA, 10mA
- Current - Collector Cutoff (Max)：500nA
- Frequency - Transition：150 MHz
- Power - Max：125 mW
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-89, SOT-490
- Supplier Device Package：SSMini3-F1
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Overview
The UNR921AJ0L is a Silicon NPN epitaxial planar transistor with built-in bias resistors, designed for digital circuits. It features an SS-Mini (SC-89) package with three pins. Key electrical ratings include a collector-emitter voltage of 50 V and a maximum collector current of 100 mA. The device dissipates up to 125 mW at 25°C. Internal resistance values are R1 = 100 kΩ and R2 = 100 kΩ. Transition frequency is 150 MHz.
Feature Summary
- Integrates dual bias resistors to reduce component count and equipment size.
- Utilizes compact SS-Mini surface mount packaging for automated insertion.
Applications
- Digital circuit switching
- General electronic equipment
- Office equipment signal control
Procurement Notes
Verify the specific marking code '8X' on the component body to confirm the UNR921AJ variant. Ensure the ordering suffix matches the required tape and reel configuration. Confirm RoHS compliance status with the supplier before finalizing procurement orders.
Selection Notes
Select this part when a high-value base drive resistor is required for NPN switching applications. The dual 100 kΩ resistor configuration suits circuits needing balanced input impedance. Verify that the 50 V breakdown voltage meets the system's peak operating requirements.
Part Context
This component belongs to the Panasonic UNR921xJ series of pre-biased transistors. The series offers various internal resistor combinations to simplify digital logic interface designs. The UNR921AJ specifically provides equal high-resistance values for both base connections.
Replacement Considerations
Check datasheets for other UNR921xJ variants with identical 100 kΩ / 100 kΩ resistor ratios. Verify pinout compatibility and thermal dissipation limits before substituting with generic discrete transistors and external resistors.
FAQ
What are the internal resistor values for the UNR921AJ?
The UNR921AJ contains two internal resistors: R1 is 100 kΩ and R2 is 100 kΩ.
What is the transition frequency of this transistor?
The transition frequency (fT) is specified as 150 MHz under standard test conditions.
Is this component suitable for automotive safety applications?
No. The datasheet explicitly states it is intended for standard applications like office equipment and general electronics, not for safety-critical automotive systems.
