The B772 (2SB772) is a mediumpower PNP bipolar junction transistor (BJT) housed in a TO126 package. It is designed for output stages of audio amplifiers, voltage regulators, DC-DC converters, and relay drivers . It is the complementary (PNP) counterpart to the NPN transistor D882 (2SD882) .
| Parameter | Value | Notes |
|---|---|---|
| -- | -- | -- |
| Collector-Base Voltage (VCBO) | -40V | |
| Collector-Emitter Voltage (VCEO) | -30V | Maximum continuous voltage |
| Emitter-Base Voltage (VEBO) | 5V to 6V | |
| Collector Current (IC) | -3A | Continuous current rating |
| Peak Collector Current (ICM) | -7A | Non-repetitive peak current |
| Power Dissipation (Ptot) | 1.25W (Free air) / 10W-12.5W (With heatsink) | Varies by manufacturer |
| DC Current Gain (hFE) | 60 - 400 | Depends on ranking |
| Transition Frequency (fT) | 80 - 100 MHz | Typical value |
| Operating/Storage Temperature | -55°C to +150°C |
High Current Capability 3A continuous collector current for driving mediumpower loads
Low Saturation Voltage 0.5V max at IC = -2A ensures low conduction losses
Complementary PNP Design - Designed as a complementary transistor to the 2SD882 (NPN)
Excellent hFE Linearity - Available in hFE rankings from 60 to 400
Versatile Performance - Suitable for both switching and amplification applications
√ Ready to use Standard TO126 package for easy through-hole mounting
√ Multiple hFE ranks Available in R (60120), O (100200), Y (160320), and GR (200-400) ranks
√ High transition frequency 80100 MHz for good performance in amplifier circuits
Avoid exceeding the maximum voltage ratings the collectoremitter voltage (VCEO) of 30V is critical
-Avoid exceeding the maximum junction temperature of 150°C
Avoid using this transistor as a direct replacement without confirming the pinout and specifications some alternatives like TIP32C have different pinouts
