| Part Number | 1N977B | 1N974B |
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Microchip Technology |
| Category | Diodes - Zener - Single | Diodes - Zener - Single |
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| Product Status | Obsolete | Active |
| Voltage - Zener (Nom) (Vz) | 47 V | 36 V |
| Tolerance | ±5% | ±5% |
| Power - Max | 500 mW | 500 mW |
| Impedance (Max) (Zzt) | 105 Ohms | 70 Ohms |
| Current - Reverse Leakage @ Vr | 5 µA @ 35.8 V | 5 µA @ 27.4 V |
| Voltage - Forward (Vf) (Max) @ If | - | 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 |