继电器是一种电子控制器件，它具有控制系统（又称输入回路）和被控制系统（又称输出回路），通常应用于自动控制电路中，它实际上是用较小的电流去控制较大电流的一种“故在电路中起着自动调节、安全保护、转换电路等作用。
编辑摘要
百科帮你涨姿势
广泛应用于通信和航天技术等领域 起控制保护 调节和传递信息作用
应用最广的是电磁继电器 由电磁系统 接触系统 传动复原机构组成
选用时控制电路电源电压可作依据 控制电路应能给其提供足够电流
3RB2066-1GC2 3RB2906-2JG1 3RF2120-1AA02 3RF2190-3AA04 3RF2320-2AA02 3RF2410-2AC45 3RK1100-1CE00-0AA2 3RK1200-0CE02-0AA2 3RK1200-0DQ00-0AA3 3RK1207-2BQ40-OAA3 3RK1301-0AB10-0AB4 3RK1301-0AB10-1AB4 3RK1301-0BB10-0AB4 3RK1301-0CB10-0AB4 3RK1301-0CB20-0AB4 3RK1301-0EB00-0AA2 3RK1301-0EB00-1AA2 3RK1301-0GB00-1AA2 3RK1301-0JB00-0AA2 3RK1301-0KB00-0AA2 3RK1301-1AB00-1AA2 3RK1301-1BB00-0AA2 3RK1301-1BB00-1AA2 3RK1301-1CB00-1AA2 3RK1301-1DB00-1AA2 3RK1301-1EB00-0AA2 3RK1301-1EB00-1AA2 3RK1301-1FB00-0AA2 3RK1301-1FB00-1AA2 3RK1301-1GB00-0AA2 3RK1301-1GB00-1AA2 3RK1301-1HB00-0AA2 3RK1301-1JB00-0AA2 3RK1301-1JB00-1AA2 3RK1301-1KB00-0AA2 3RK1301-1KB00-1AA2 3RK1304-0HS00-6AA0 3RK1304-0HS00-8AA0 3RK1304-5KS40-4AA0 3RK1304-5KS40-4AA3 3RK1304-5KS40-5AA0 3RK1304-5KS40-5AA3 3RK1400-0CE10-0AA2 3RK1400-1CE00-0AA2 3RK1400-1CG01-0AA2 3RK1400-1DQ00-0AA3 3RK1402-3CG00-0AA2 3RK1901-1NR12 3RK1902-0CE00 3RK1902-0CJ00 3RK1902-0CK00 3RK1902-4BA00-5AA0 3RK1903-0AE00 3RK1903-0BA00 3RK1903-0CD00 3RK1904-2AB02 3RK1911-1AJ22 3RK1911-2BF50 3RK1922-2BA00 3RK1922-2BP00 3RK1922-2BQ00 3RK2200-0CT30-0AA3 3RK2400-1BT30-0AA3