Overview
The MJD127T4G is a PNP Darlington power transistor manufactured by onsemi. This transistor is part of the MJD127 series, known for its high current gain and robust performance. It is packaged in a DPAK (TO-252) case, which is lead-free and suitable for surface mount applications. The MJD127T4G is designed to handle high collector currents and is often used in power switching and amplification roles.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Collector-Emitter Voltage | VCEO | 100 | Vdc |
| Collector-Base Voltage | VCB | 100 | Vdc |
| Emitter-Base Voltage | VEB | 5 | Vdc |
| Collector Current Continuous/Peak | IC | 8 / 16 | A |
| Base Current | IB | 120 | mAdc |
| Total Power Dissipation @ TC = 25°C | PD | 20 | W |
| Total Power Dissipation @ TA = 25°C | PD | 1.75 | W |
| Thermal Resistance, Junction-to-Case | RJC | 6.25 | °C/W |
| Thermal Resistance, Junction-to-Ambient | RJA | 71.4 | °C/W |
| Operating and Storage Junction Temperature Range | TJ, Tstg | −65 to +150 | °C |
| Collector-Emitter Sustaining Voltage | VCEO(sus) | 100 | Vdc |
| Base-Emitter On Voltage | VBE(on) | −2.8 | Vdc |
| Small-Signal Current Gain | hfe | 300 |
Key Features
- High Current Gain: The MJD127T4G offers a high DC current gain, making it suitable for applications requiring significant current amplification.
- High Collector Current: Capable of handling continuous collector currents up to 8 A and peak currents up to 16 A.
- Robust Thermal Performance: With thermal resistances of 6.25 °C/W (junction-to-case) and 71.4 °C/W (junction-to-ambient), it ensures reliable operation under various thermal conditions.
- Wide Operating Temperature Range: Operates within a junction temperature range of −65 to +150 °C, making it versatile for different environmental conditions.
- Lead-Free Packaging: Packaged in a lead-free DPAK (TO-252) case, suitable for surface mount applications and compliant with environmental regulations.
Applications
The MJD127T4G is widely used in various power switching and amplification applications, including:
- Power Supplies: For high-current switching in power supply units.
- Motor Control: In motor drive circuits where high current gain is necessary.
- Audible Alarm and Siren Drivers: For driving high-current loads in alarm systems.
- Relay and Solenoid Drivers: For controlling relays and solenoids in industrial and automotive applications.
Q & A
- What is the collector-emitter voltage rating of the MJD127T4G?
The collector-emitter voltage rating is 100 Vdc. - What is the maximum continuous collector current of the MJD127T4G?
The maximum continuous collector current is 8 A. - What is the thermal resistance from junction to case for the MJD127T4G?
The thermal resistance from junction to case is 6.25 °C/W. - What is the operating junction temperature range for the MJD127T4G?
The operating junction temperature range is −65 to +150 °C. - What type of packaging does the MJD127T4G use?
The MJD127T4G is packaged in a lead-free DPAK (TO-252) case. - What are some common applications of the MJD127T4G?
Common applications include power supplies, motor control, audible alarm and siren drivers, and relay and solenoid drivers. - What is the base-emitter on voltage for the MJD127T4G?
The base-emitter on voltage is approximately −2.8 Vdc. - How much total power can the MJD127T4G dissipate at 25°C?
The total power dissipation at 25°C is 20 W for the case temperature and 1.75 W for the ambient temperature. - Is the MJD127T4G suitable for surface mount applications?
Yes, the MJD127T4G is suitable for surface mount applications due to its DPAK packaging. - What is the small-signal current gain of the MJD127T4G?
The small-signal current gain (hfe) is approximately 300.
