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| Part Number | 1N5251B-T | 1N5251B-TR | 1N5257B-T | 1N5252B-T | 1N5254B-T | 1N5255B-T | 1N5256B-T | 1N5251B-TP | 1N5253B-T | 1N5250B-T |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Diodes Incorporated | Vishay General Semiconductor - Diodes Division | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Micro Commercial Co | Vishay General Semiconductor - Diodes Division | Diodes Incorporated |
| Product Status | Obsolete | Active | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Voltage - Zener (Nom) (Vz) | 22 V | 22 V | 33 V | 24 V | 27 V | 28 V | 30 V | 22 V | 25 V | 20 V |
| Tolerance | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% | ±5% |
| Power - Max | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW | 500 mW |
| Impedance (Max) (Zzt) | 29 Ohms | 29 Ohms | 58 Ohms | 33 Ohms | 41 Ohms | 44 Ohms | 49 Ohms | 29 Ohms | 600 Ohms | 25 Ohms |
| Current - Reverse Leakage @ Vr | 100 nA @ 17 V | 100 nA @ 17 V | 100 nA @ 25 V | 100 nA @ 18 V | 100 nA @ 21 V | 100 nA @ 21 V | 100 nA @ 23 V | 100 nA @ 17 V | 100 nA @ 19 V | 100 nA @ 15 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 | 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 ~ 200°C | 175°C | -65°C ~ 200°C | -65°C ~ 200°C | -65°C ~ 175°C | -65°C ~ 200°C | -65°C ~ 200°C | -55°C ~ 150°C | 175°C | -65°C ~ 200°C |
| Mounting Type | 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-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-204AH, DO-35, Axial | DO-204AH, DO-35, Axial | DO-204AH, DO-35, Axial |
| Supplier Device Package | DO-35 | DO-35 (DO-204AH) | DO-35 | DO-35 | DO-35 | DO-35 | DO-35 | DO-35 | DO-35 (DO-204AH) | DO-35 |
