Model No: MM3Z3V9ST1G
onsemi MM3Z3V9ST1G
Manufacturer: onsemi
SEMICON NO.: MM3Z3V9ST1G
Package: SOD-323
Stock: In stock
Description: Single Zener Diodes 3.9V 300mW ±2%
SEMICON NO.: MM3Z3V9ST1G
Package: SOD-323
Stock: In stock
Description: Single Zener Diodes 3.9V 300mW ±2%
Quantity :
| Mfr | onsemi |
| Device Type | Single Zener Diode (Voltage Regulator) |
| Product Series | MM3ZxxxST1G Series |
| Zener Voltage | 3.89 V to 4.16 V, Nominal 3.9 V |
| Voltage Tolerance | ±2% |
| Power Dissipation | 300 mW |
| Forward Voltage | 900 mV @ 10 mA |
| Reverse Leakage Current | 3 µA @ 1 V |
| Dynamic Impedance | 90 Ω |
| Knee Impedance | 1 kΩ |
| Operating Temperature | −65°C to +150°C |
| Package | SOD-323 |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
MM3Z3V9ST1G is a 3.9V, 300mW surface mount zener diode manufactured by onsemi, packaged in compact SOD-323 with tight ±2% voltage tolerance, designed for precise voltage clamping, reference generation and transient protection in dense portable and consumer PCBs, supporting wide junction temperature range from -65°C to 150°C and meeting RoHS and halogen-free standards.
Key highlights of MM3Z3V9ST1G include: nominal zener voltage of 3.9V with ±2% high precision tolerance; 300mW power dissipation rating and low zener impedance up to 90 Ohms; tiny thin SOD-323 footprint ideal for high-density layout; ESD class 3 rating above 16kV HBM for enhanced anti-static performance; low reverse leakage current of 3µA at 1V; matte tin lead finish, lead-free construction and UL94 V-0 flame retardant molding compound.
This SMD zener diode is widely used for voltage reference circuits, input signal clamping, overvoltage protection for MCU pins, battery charger auxiliary circuits, portable IoT sensors, wearable electronics, communication modules and small power supply boards where stable low-voltage regulation and compact component size are required.
Alternative models
● MM3Z3V9T1G is the standard ±5% tolerance 3.9V SOD-323 zener diode with looser voltage accuracy for cost-sensitive non-critical protection circuits
● MMSZ3V9T1G is a 500mW higher-power SOD-123 zener variant offering larger power margin for heavier clamping loads
● BZX84C3V9 is a 3.9V SOT-23 packaged zener diode suitable for layouts with larger available PCB space.
