| Part Number | 1N748ATR | 1N748A/TR | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Microchip Technology | 
| Category | Diodes - Zener - Single | Diodes - Zener - Single | 
|   |   | |
| Product Status | Obsolete | Active | 
| Voltage - Zener (Nom) (Vz) | 3.9 V | 3.9 V | 
| Tolerance | ±5% | ±5% | 
| Power - Max | 500 mW | 500 mW | 
| Impedance (Max) (Zzt) | 23 Ohms | 23 Ohms | 
| Current - Reverse Leakage @ Vr | 10 µA @ 1 V | 2 µA @ 10 V | 
| Voltage - Forward (Vf) (Max) @ If | 1.5 V @ 200 mA | 1.1 V @ 200 mA | 
| Operating Temperature | -65°C ~ 200°C | -65°C ~ 175°C | 
| Mounting Type | Through Hole | Through Hole | 
| Package / Case | DO-204AH, DO-35, Axial | DO-204AA, DO-7, Axial | 
| Supplier Device Package | DO-35 (DO-204AH) | DO-7 (DO-204AA) |