Model No: 1SMB5921BT3G
onsemi 1SMB5921BT3G
Manufacturer: onsemi
SEMICON NO.: 1SMB5921BT3G
Package: DO-214AA (SMB)
Stock: In stock
Description: Zener Diode 6.8V 3W ±5% 2.5 Ω
SEMICON NO.: 1SMB5921BT3G
Package: DO-214AA (SMB)
Stock: In stock
Description: Zener Diode 6.8V 3W ±5% 2.5 Ω
Quantity :
| Mfr | onsemi |
| Device Type | Zener Single Diode / Voltage Regulator |
| Product Range | 1SMB59xxBT3G Series |
| Zener Voltage | 6.8 V (Nominal ) |
| Zener Voltage Range | 6.46 V to 7.14 V |
| Voltage Tolerance | ±5% |
| Power Dissipation (Pd) | 3 W |
| Impedance (Zzt) | 2.5 Ω (Max) |
| Reverse Leakage Current (Ir) | 5 µA @ 5.2 V |
| Forward Voltage (Vf) | 1.5 V @ 200 mA (Max) |
| Forward Current (If) | 55.1 mA |
| Package | DO-214AA (SMB) |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
1SMB5921BT3G is a 3‑watt surface‑mount Zener diode manufactured by onsemi, delivering a stable 6.8 V nominal breakdown voltage with ±5 % tolerance for voltage regulation and surge‑clamping applications. Packaged in the two‑pin SMB (DO‑214AA) plastic housing and shipped on tape‑and‑reel for automated SMT assembly, this silicon regulator diode provides 2.5 Ω dynamic impedance, 55.1 mA Zener test‑current rating, ESD protection above 16 kV under human‑body‑model conditions, and wide operating temperature range from ‑65 °C to 150 °C, offering reliable over‑voltage protection and fixed reference voltage for industrial power circuits, consumer electronics and automotive accessory hardwareonsemi.
Key Features
● High 3‑watt maximum power dissipation capacity at 25 °C ambient temperature, supporting heavy‑duty low‑voltage regulation tasks.
● Low 2.5 Ω dynamic Zener impedance for tight, stable voltage performance during load‑current fluctuations.
● High ESD robustness of over 16 kV human‑body‑model rating, adding extra electrostatic‑shock protection for assembled boards.
● Maximum forward voltage of 1.5 V under 200 mA forward‑current test condition for consistent reverse‑bias operation.
● Extended operating junction temperature range of ‑65 °C to 150 °C, adapting to severe thermal environments.
FAQ
Q: What is the main function of this 3‑W Zener diode?
A: It clamps voltage at 6.8 V and provides over‑voltage protection or stable reference voltage for downstream circuits.
Q: Is a current‑limiting resistor required in series?
A: Yes, a series resistor must be added to restrict reverse current and prevent thermal burnout.
Alternative voltage regulator diode models
1. SZ1SMB5921BT3G: Automotive‑grade AEC‑Q101 qualified 6.8 V, 3‑W SMB Zener diode from onsemi, built to meet strict reliability standards for vehicle electronics.
2. 1N5921B: Through‑hole 3‑watt 6.8 V Zener diode with identical electrical parameters, suitable for breadboard prototyping and manual assembly projects.
3. 1SMB5922BT3G: 7.5 V 3‑W SMB Zener diode from the same product family, a convenient upgrade option for designs requiring a higher reference‑voltage level.
Key Features
● High 3‑watt maximum power dissipation capacity at 25 °C ambient temperature, supporting heavy‑duty low‑voltage regulation tasks.
● Low 2.5 Ω dynamic Zener impedance for tight, stable voltage performance during load‑current fluctuations.
● High ESD robustness of over 16 kV human‑body‑model rating, adding extra electrostatic‑shock protection for assembled boards.
● Maximum forward voltage of 1.5 V under 200 mA forward‑current test condition for consistent reverse‑bias operation.
● Extended operating junction temperature range of ‑65 °C to 150 °C, adapting to severe thermal environments.
FAQ
Q: What is the main function of this 3‑W Zener diode?
A: It clamps voltage at 6.8 V and provides over‑voltage protection or stable reference voltage for downstream circuits.
Q: Is a current‑limiting resistor required in series?
A: Yes, a series resistor must be added to restrict reverse current and prevent thermal burnout.
Alternative voltage regulator diode models
1. SZ1SMB5921BT3G: Automotive‑grade AEC‑Q101 qualified 6.8 V, 3‑W SMB Zener diode from onsemi, built to meet strict reliability standards for vehicle electronics.
2. 1N5921B: Through‑hole 3‑watt 6.8 V Zener diode with identical electrical parameters, suitable for breadboard prototyping and manual assembly projects.
3. 1SMB5922BT3G: 7.5 V 3‑W SMB Zener diode from the same product family, a convenient upgrade option for designs requiring a higher reference‑voltage level.
