| Part Number | MMSZ5256B | MMSZ5253B | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | 
| Category | Diodes - Zener - Single | Diodes - Zener - Single | 
|   |   | |
| Product Status | Active | Active | 
| Voltage - Zener (Nom) (Vz) | 30 V | 25 V | 
| Tolerance | ±5% | ±5% | 
| Power - Max | 500 mW | 500 mW | 
| Impedance (Max) (Zzt) | 49 Ohms | 35 Ohms | 
| Current - Reverse Leakage @ Vr | 100 nA @ 23 V | 100 nA @ 19 V | 
| Voltage - Forward (Vf) (Max) @ If | 900 mV @ 10 mA | 900 mV @ 10 mA | 
| Operating Temperature | 150°C (TJ) | 150°C (TJ) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | SOD-123 | SOD-123 | 
| Supplier Device Package | SOD-123 | SOD-123 |