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| Part Number | 1N991A | 1N992A | 1N991B | 1N981A | 1N990A |
|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Discontinued at Digi-Key | Active | Active | Active |
| Voltage - Zener (Nom) (Vz) | 180 V | 200 V | 180 V | 68 V | 160 V |
| Tolerance | ±10% | ±10% | ±5% | ±10% | ±10% |
| Power - Max | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW |
| Impedance (Max) (Zzt) | 2.2 kOhms | 2.5 kOhms | 2.2 kOhms | 230 Ohms | 1.7 kOhms |
| Current - Reverse Leakage @ Vr | 5 µA @ 136.8 V | 5 µA @ 152 V | 5 µA @ 136.8 V | 5 µA @ 51.7 V | 5 µA @ 121.6 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 | 1.1 V @ 200 mA |
| Operating Temperature | -65°C ~ 175°C | -65°C ~ 175°C | -65°C ~ 175°C | -65°C ~ 175°C | -65°C ~ 175°C |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | DO-204AA, DO-7, Axial | DO-204AA, DO-7, Axial | DO-204AA, DO-7, Axial | DO-204AA, DO-7, Axial | DO-204AA, DO-7, Axial |
| Supplier Device Package | DO-7 | DO-7 | DO-7 | DO-7 | DO-7 |
