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Littelfuse 单功能继电器用于保护、控制和/或监测发电机及其他设备。这些高质量的单功能继电器用于各种工业应用，包括固态开关保护、专用温度控制和相位控制调整。简化的控制装置可执行特定功能，例如调整灯光强度、改变电机速度或管理加热器温度。
| 产品号 | 系列 | 功能类型 | 线圈电压 (V) | 触点电流 (A) | 触点电压 (V) | 触点配置 | 动作时间 (ms) | 工作温度 (°C) | 封装 |
|---|---|---|---|---|---|---|---|---|---|
| SFR-OV-12-5 | Overvoltage Relay | 过压保护 | 12 DC | 5 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-OV-12-10 | Overvoltage Relay | 过压保护 | 12 DC | 10 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-OV-24-5 | Overvoltage Relay | 过压保护 | 24 DC | 5 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-OV-24-10 | Overvoltage Relay | 过压保护 | 24 DC | 10 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-OV-24-15 | Overvoltage Relay | 过压保护 | 24 DC | 15 | 250 AC | 2 Form C | 25 | -40~85 | 14-Pin DIP |
| SFR-UV-12-5 | Undervoltage Relay | 欠压保护 | 12 DC | 5 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-UV-12-10 | Undervoltage Relay | 欠压保护 | 12 DC | 10 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-UV-24-5 | Undervoltage Relay | 欠压保护 | 24 DC | 5 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-UV-24-10 | Undervoltage Relay | 欠压保护 | 24 DC | 10 | 250 AC | 1 Form C | 20 | -40~85 | 8-Pin DIP |
| SFR-UV-24-15 | Undervoltage Relay | 欠压保护 | 24 DC | 15 | 250 AC | 2 Form C | 25 | -40~85 | 14-Pin DIP |
| SFR-OC-12-5 | Overcurrent Relay | 过流保护 | 12 DC | 5 | 250 AC | 1 Form C | 30 | -40~85 | 8-Pin DIP |
| SFR-OC-12-10 | Overcurrent Relay | 过流保护 | 12 DC | 10 | 250 AC | 1 Form C | 30 | -40~85 | 8-Pin DIP |
| SFR-OC-24-5 | Overcurrent Relay | 过流保护 | 24 DC | 5 | 250 AC | 1 Form C | 30 | -40~85 | 8-Pin DIP |
| SFR-OC-24-10 | Overcurrent Relay | 过流保护 | 24 DC | 10 | 250 AC | 1 Form C | 30 | -40~85 | 8-Pin DIP |
| SFR-OC-24-15 | Overcurrent Relay | 过流保护 | 24 DC | 15 | 250 AC | 2 Form C | 35 | -40~85 | 14-Pin DIP |
| SFR-FR-12-5 | Frequency Relay | 频率保护 | 12 DC | 5 | 250 AC | 1 Form C | 25 | -40~85 | 8-Pin DIP |
| SFR-FR-12-10 | Frequency Relay | 频率保护 | 12 DC | 10 | 250 AC | 1 Form C | 25 | -40~85 | 8-Pin DIP |
| SFR-FR-24-5 | Frequency Relay | 频率保护 | 24 DC | 5 | 250 AC | 1 Form C | 25 | -40~85 | 8-Pin DIP |
| SFR-FR-24-10 | Frequency Relay | 频率保护 | 24 DC | 10 | 250 AC | 1 Form C | 25 | -40~85 | 8-Pin DIP |
| SFR-FR-24-15 | Frequency Relay | 频率保护 | 24 DC | 15 | 250 AC | 2 Form C | 30 | -40~85 | 14-Pin DIP |
| SFR-PH-24-10 | Phase Failure Relay | 缺相保护 | 24 DC | 10 | 440 AC | 2 Form C | 30 | -40~85 | 11-Pin DIP |
| SFR-PH-24-15 | Phase Failure Relay | 缺相保护 | 24 DC | 15 | 440 AC | 2 Form C | 30 | -40~85 | 11-Pin DIP |
| SFR-PH-24-20 | Phase Failure Relay | 缺相保护 | 24 DC | 20 | 440 AC | 3 Form C | 35 | -40~85 | 14-Pin DIP |
| SFR-SEQ-24-10 | Phase Sequence Relay | 相序保护 | 24 DC | 10 | 440 AC | 2 Form C | 30 | -40~85 | 11-Pin DIP |
| SFR-SEQ-24-15 | Phase Sequence Relay | 相序保护 | 24 DC | 15 | 440 AC | 2 Form C | 30 | -40~85 | 11-Pin DIP |
| SFR-GF-24-10 | Ground Fault Relay | 接地故障保护 | 24 DC | 10 | 250 AC | 1 Form C | 25 | -40~85 | 8-Pin DIP |
| SFR-GF-24-15 | Ground Fault Relay | 接地故障保护 | 24 DC | 15 | 250 AC | 2 Form C | 25 | -40~85 | 14-Pin DIP |
| SFR-TD-24-10 | Time Delay Relay | 延时控制 | 24 DC | 10 | 250 AC | 2 Form C | 10+Delay | -40~85 | 14-Pin DIP |
| SFR-TD-24-15 | Time Delay Relay | 延时控制 | 24 DC | 15 | 250 AC | 2 Form C | 10+Delay | -40~85 | 14-Pin DIP |
| SFR-PLC-24-10 | PLC Interface Relay | PLC接口 | 24 DC | 10 | 250 AC | 2 Form C | 15 | -40~85 | 14-Pin DIP |
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冲突矿产（3TG）的定义
冲突矿产（3TG）是指锡（Sn）、钽（Ta）、钨（W）、金（Au）及其衍生矿物。
上海查尔斯电子有限公司承诺不从刚果民主共和国（刚果金）及其周边冲突及高风险地区采购 3TG 矿物