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| Part Number | 1N978B | 1N979B | 1N988B | 1N968B | 1N970B | 1N971B | 1N972B | 1N973B | 1N974B | 1N975B | 1N976B | 1N977B | 1N978A |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | Microchip Technology | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | Microchip Technology | Microchip Technology | Fairchild Semiconductor | Fairchild Semiconductor | Microchip Technology |
| Product Status | Obsolete | Obsolete | Discontinued at Digi-Key | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active | Active | Obsolete | Obsolete | Discontinued at Digi-Key |
| Voltage - Zener (Nom) (Vz) | 51 V | 56 V | 130 V | 20 V | 24 V | 27 V | 30 V | 33 V | 36 V | 39 V | 43 V | 47 V | 51 V |
| Tolerance | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±10% |
| Power - Max | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW |
| Impedance (Max) (Zzt) | 125 Ohms | 150 Ohms | 1.1 kOhms | 25 Ohms | 33 Ohms | 41 Ohms | 49 Ohms | 58 Ohms | 70 Ohms | 80 Ohms | 93 Ohms | 105 Ohms | 125 Ohms |
| Current - Reverse Leakage @ Vr | 5 µA @ 38.8 V | 5 µA @ 42.6 V | 5 µA @ 98.8 V | 5 µA @ 15.2 V | 5 µA @ 18.2 V | 5 µA @ 20.6 V | 5 µA @ 22.8 V | 5 µA @ 25.1 V | 5 µA @ 27.4 V | 5 µA @ 29.7 V | 5 µA @ 32.7 V | 5 µA @ 35.8 V | 5 µA @ 38.8 V |
| Voltage - Forward (Vf) (Max) @ If | - | - | 1.1 V @ 200 mA | - | - | - | - | - | 1.1 V @ 200 mA | 1.1 V @ 200 mA | - | - | 1.1 V @ 200 mA |
| Operating Temperature | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 175°C | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 175°C | -65°C ~ 175°C | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 175°C |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AA, DO-7, Axial | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AA, DO-7, Axial | DO-204AA, DO-7, Axial | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AA, DO-7, Axial |
| Supplier Device Package | DO-35 (DO-204AH) | DO-35 (DO-204AH) | DO-7 | DO-35 (DO-204AH) | DO-35 (DO-204AH) | DO-35 (DO-204AH) | DO-35 (DO-204AH) | DO-35 (DO-204AH) | DO-7 | DO-7 | DO-35 (DO-204AH) | DO-35 (DO-204AH) | DO-7 |
