本公司优势产品：  

A B B: A，TA热继电器,T系列塑壳断路器

三菱低压 ：塑壳断路器  漏电开关   热继电器

欧姆龙低压：中间继电器  E2E通用接近开关   微型光电开关

西门子低压: 3TF/3TB，3UA热继电器  3VU电机保护器 5SJ6/3VT断路器

施耐德低压：按钮开关   热继电器   C65N小型断路器 塑壳断路器。

台安科技：CU/CN BO塑壳断路器 BM小型断路器

以上产品长期有大量原装库存。欢迎垂询！

3TF系列为交流50Hz或60Hz，额定绝缘电压为690-1000V，在AC-3使用类别下额定工作电压为380V时的额定工作电流为9A,12A16A,22A,32A,38A,45A,63A,75A,85A,110A,140A,170A,205A,250A,300A,400A，主要供远距离接通及分断电路之用，适用于控制交流电动机的起动、停止及反转。符合IEC947，VDE0660，GB14048等标准。 

?安全性能好，导电部件不外露；

?体积小、重量轻，灭弧罩材料采用不饱和树脂，耐弧性好，不会碎裂；

?灭弧室呈封闭型，飞弧距离小，可缩小电气箱体尺寸；

?主触头系统结构独特，触头磨损小，电寿命增加；

?电磁铁工作可靠，损耗少，噪音小，且具很高的机械强度；

?操作频率和控制容量高；

?3TF30-35系列可外加辅助触头座；

?SIGUT-西门子端接法，接线方便，牢固，接触可靠性高，抗振性强，安全防护性好。 

西门子(SIEMENS)3TF30-西门子(SIEMENS)3TF35

西门子(SIEMENS)3TF40-西门子(SIEMENS)3TF45

西门子(SIEMENS)3TF46-西门子(SIEMENS)3TF49

西门子(SIEMENS)3TF50-西门子(SIEMENS)3TF56

3TF30000XB0  ,9A AC24V 50Hz

3TF30000XC0  ,9A

3TF30000XC1  ,9A

3TF30000XC2  ,9A AC24V 50/60Hz

3TF30000XD0  ,9A AC42V 50Hz

3TF30000XD2  ,9A AC42V 60Hz

3TF30000XE0  ,9A

3TF30000XF0  ,9A AC110V 50Hz

3TF30000XG0  ,9A AC36V 50Hz

3TF30000XG1  ,9A

3TF30000XG2  ,9A AC110V 50/60Hz

3TF30000XH0  ,9A AC48V 50Hz

3TF30000XL0  ,9A

3TF30000XL1  ,9A

3TF30000XL2  ,9A AC230V 50/60Hz

3TF30000XM0  ,9A AC220V 50Hz

3TF30000XM1  ,9A

3TF30000XM2  ,9A

3TF30000XN1  ,9A

3TF30000XN2  ,9A AC220V 50/60Hz

3TF30000XP0  ,9A AC230V 50Hz

3TF30000XP1  ,9A

3TF30000XP2  ,9A

3TF30000XQ0  ,9A AC380V 50Hz

3TF30000XQ2  ,9A

3TF30000XR0  ,9A AC415V 50Hz

3TF30000XR1  ,9A

3TF30010XB0  ,9A AC24V 50Hz, 1NC

3TF30010XC0  ,9A, 1NC

3TF30010XC1  ,9A, 1NC

3TF30010XC2  ,9A AC24V 50/60Hz, 1NC

3TF30010XD0  ,9A AC42V 50Hz, 1NC

3TF30010XD2  ,9A AC42V 60Hz, 1NC

3TF30010XE0  ,9A, 1NC

3TF30010XF0  ,9A AC110V 50Hz, 1NC

3TF30010XG0  ,9A AC36V 50Hz, 1NC

3TF30010XG1  ,9A, 1NC

3TF30010XG2  ,9A AC110V 50/60Hz, 1NC

3TF30010XH0  ,9A AC48V 50Hz, 1NC

3TF30010XL0  ,9A, 1NC

3TF30010XL1  ,9A, 1NC

3TF30010XL2  ,9A AC230V 50/60Hz, 1NC

3TF30010XM0  ,9A AC220V 50Hz, 1NC

3TF30010XM1  ,9A, 1NC

3TF30010XM2  ,9A, 1NC

3TF30010XN1  ,9A, 1NC

3TF30010XN2  ,9A AC220V 50/60Hz, 1NC

3TF30010XP0  ,9A AC230V 50Hz, 1NC

3TF30010XP1  ,9A, 1NC

3TF30010XP2  ,9A, 1NC

3TF30010XQ0  ,9A AC380V 50Hz, 1NC

3TF30010XQ2  ,9A, 1NC

3TF30010XR0  ,9A AC415V 50Hz, 1NC

3TF30010XR1  ,9A, 1NC

3TF30010XR2  ,9A, 1NC

3TF30010XS0  ,9A AC500V 50Hz, 1NC

3TF30010XS1  ,9A, 1NC

3TF30010XS2  ,9A, 1NC

3TF30010XU0  ,9A AC240V 50Hz, 1NC

3TF30010XV0  ,9A AC400V 50Hz, 1NC

3TF30100XB0  ,9A AC24V 50Hz, 1NO

3TF30100XC0  ,9A, 1NO

3TF30100XC1  ,9A, 1NO

3TF30100XC2  ,9A AC24V 50/60Hz, 1NO

3TF30100XD0  ,9A AC42V 50Hz, 1NO

3TF30100XD2  ,9A AC42V 60Hz, 1NO

3TF30100XE0  ,9A, 1NO

3TF30100XF0  ,9A AC110V 50Hz, 1NO

3TF30100XH0  ,9A AC48V 50Hz, 1NO

3TF30100XL0  ,9A, 1NO

3TF30100XM0  ,9A AC220V 50Hz, 1NO

3TF30100XP0  ,9A AC230V 50Hz, 1NO

3TF30100XP1  ,9A, 1NO

3TF30100XP2  ,9A, 1NO

3TF30100XQ0  ,9A AC380V 50Hz, 1NO

3TF30100XQ2  ,9A, 1NO

3TF30100XR0  ,9A AC415V 50Hz, 1NO

3TF30100XR1  ,9A, 1NO

3TF30100XR2  ,9A, 1NO

3TF30100XS0  ,9A AC500V 50Hz, 1NO

3TF30100XS1  ,9A, 1NO

3TF31000XB0  ,12A AC24V 50Hz

3TF31000XC0  ,12A

3TF31000XC1  ,12A

3TF31000XC2  ,12A AC24V 50/60Hz

3TF31000XD0  ,12A AC42V 50Hz

3TF31000XD2  ,12A AC42V 60Hz

3TF31000XE0  ,12A

3TF31000XF0  ,12A AC110V 50Hz

3TF31000XG0  ,12A AC36V 50Hz

3TF31000XG1  ,12A

3TF31000XG2  ,12A AC110V 50/60Hz

3TF31000XH0  ,12A AC48V 50Hz

3TF31000XJ1  ,12A

3TF31000XJ2  ,12A

3TF31000XK1  ,12A

3TF31000XK2  ,12A

3TF31000XL0  ,12A

3TF31000XL1  ,12A

3TF31000XL2  ,12A AC230V 50/60Hz

3TF31000XM0  ,12A AC220V 50Hz

3TF31000XM1  ,12A

3TF31000XM2  ,12A

3TF31000XN1  ,12A

3TF31000XN2  ,12A AC220V 50/60Hz

3TF31000XP0  ,12A AC230V 50Hz

3TF31000XP1  ,12A

3TF31000XP2  ,12A

3TF31000XQ0  ,12A AC380V 50Hz

3TF31000XQ2  ,12A

3TF31000XR0  ,12A AC415V 50Hz

3TF31010XB0  ,12A AC24V 50Hz, 1NC

3TF31010XC0  ,12A, 1NC

3TF31010XC1  ,12A, 1NC

3TF31010XC2  ,12A AC24V 50/60Hz, 1NC

3TF31010XD0  ,12A AC42V 50Hz, 1NC

3TF31010XD2  ,12A AC42V 60Hz, 1NC

3TF31010XE0  ,12A, 1NC

3TF31010XF0  ,12A AC110V 50Hz, 1NC

3TF31010XG0  ,12A AC36V 50Hz, 1NC

3TF31010XG1  ,12A, 1NC

3TF31010XG2  ,12A AC110V 50/60Hz, 1NC

3TF31010XH0  ,12A AC48V 50Hz, 1NC

3TF31010XH2  ,12A, 1NC

3TF31010XJ1  ,12A, 1NC

3TF31010XJ2  ,12A, 1NC

3TF31010XK1  ,12A, 1NC

3TF31010XK2  ,12A, 1NC

3TF31010XL0  ,12A, 1NC

3TF31010XL1  ,12A, 1NC

3TF31010XL2  ,12A AC230V 50/60Hz, 1NC

3TF31010XM0  ,12A AC220V 50Hz, 1NC

3TF31010XQ0  ,12A AC380V 50Hz, 1NC

3TF31100XB0  ,12A AC24V 50Hz, 1NO

3TF31100XC0  ,12A, 1NO

3TF31100XC1  ,12A, 1NO

3TF31100XC2  ,12A AC24V 50/60Hz, 1NO

3TF31100XD0  ,12A AC42V 50Hz, 1NO

3TF31100XD2  ,12A AC42V 60Hz, 1NO

3TF31100XE0  ,12A, 1NO

3TF31100XF0  ,12A AC110V 50Hz, 1NO

3TF31100XG0  ,12A AC36V 50Hz, 1NO

3TF31100XG1  ,12A, 1NO

3TF31100XG2  ,12A AC110V 50/60Hz, 1NO

3TF31100XH0  ,12A AC48V 50Hz, 1NO

3TF31100XJ1  ,12A, 1NO

3TF31100XJ2  ,12A, 1NO

3TF31100XK1  ,12A, 1NO

3TF31100XK2  ,12A, 1NO

3TF31100XL0  ,12A, 1NO

3TF31100XL1  ,12A, 1NO

3TF31100XL2  ,12A AC230V 50/60Hz, 1NO

3TF31100XM0  ,12A AC220V 50Hz, 1NO

3TF31100XM1  ,12A, 1NO

3TF31100XM2  ,12A, 1NO

3TF31100XN1  ,12A, 1NO

3TF31100XN2  ,12A AC220V 50/60Hz, 1NO

3TF31100XP0  ,12A AC230V 50Hz, 1NO

3TF31100XP1  ,12A, 1NO

3TF31100XP2  ,12A, 1NO

3TF31100XQ0  ,12A AC380V 50Hz, 1NO

3TF31100XQ2  ,12A, 1NO

3TF31100XR0  ,12A AC415V 50Hz, 1NO

3TF31100XR1  ,12A, 1NO

3TF31100XR2  ,12A, 1NO

3TF31100XS0  ,12A AC500V 50Hz, 1NO

3TF31100XS1  ,12A, 1NO

3TF31100XS2  ,12A, 1NO

3TF31100XU0  ,12A AC240V 50Hz, 1NO

3TF31100XV0  ,12A AC400V 50Hz, 1NO

3TF31101XA4  ,12A

3TF31101XB4  ,12A DC24V

3TF31101XC4  ,12A

3TF31101XE4  ,12A

3TF31101XF4  ,12A DC110V

3TF31101XG4  ,12A DC125V

3TF31101XM4  ,12A DC220V

3TF31101XP4  ,12A

3TF31101XV4  ,12A

3TF31101XW4  ,12A DC48V

3TF32000XB0  ,16A AC24V 50Hz

3TF32000XC0  ,16A

3TF32000XC1  ,16A

3TF32000XC2  ,16A AC24V 50/60Hz

3TF32000XD0  ,16A AC42V 50Hz

3TF32000XD2  ,16A AC42V 60Hz

3TF32000XE0  ,16A

3TF32000XF0  ,16A AC110V 50Hz

3TF32000XG0  ,16A AC36V 50Hz

3TF32000XG1  ,16A

3TF32000XG2  ,16A AC110V 50/60Hz

3TF32000XH0  ,16A AC48V 50Hz

3TF32000XJ1  ,16A

3TF32000XJ2  ,16A

3TF32000XK1  ,16A

3TF32000XK2  ,16A

3TF32000XL0  ,16A

3TF32000XL1  ,16A

3TF32000XL2  ,16A AC230V 50/60Hz

3TF32000XM0  ,16A AC220V 50Hz

3TF32000XM1  ,16A

3TF32000XM2  ,16A

3TF32000XN1  ,16A

3TF32000XN2  ,16A AC220V 50/60Hz

3TF32000XP0  ,16A AC230V 50Hz

3TF32000XP1  ,16A

3TF32000XP2  ,16A

3TF32000XQ0  ,16A AC380V 50Hz

3TF32000XQ2  ,16A

3TF32000XR0  ,16A AC415V 50Hz

3TF32000XR1  ,16A

3TF32110XB0  ,16A AC24V 50Hz, 1NC

3TF32110XC0  ,16A, 1NC

3TF32110XC1  ,16A, 1NC

3TF32110XC2  ,16A AC24V 50/60Hz, 1NC

3TF32110XD0  ,16A AC42V 50Hz, 1NC

3TF32110XD2  ,16A AC42V 60Hz, 1NC

3TF32110XE0  ,16A, 1NC

3TF32110XF0  ,16A AC110V 50Hz, 1NC

3TF32110XG0  ,16A AC36V 50Hz, 1NC

3TF32110XG1  ,16A, 1NC

3TF32110XG2  ,16A AC110V 50/60Hz, 1NC

3TF32110XH0  ,16A AC48V 50Hz, 1NC

3TF32110XJ1  ,16A, 1NC

3TF32110XJ2  ,16A, 1NC

3TF32110XK1  ,16A, 1NC

3TF32110XK2  ,16A, 1NC

3TF32110XL0  ,16A, 1NC

3TF32110XL1  ,16A, 1NC

3TF32110XL2  ,16A AC230V 50/60Hz, 1NC

3TF32110XM0  ,16A AC220V 50Hz, 1NC

3TF32110XM1  ,16A, 1NC

3TF32110XM2  ,16A, 1NC

3TF32110XN1  ,16A, 1NC

3TF32110XN2  ,16A AC220V 50/60Hz, 1NC

3TF32110XP0  ,16A AC230V 50Hz, 1NC

3TF32110XP1  ,16A, 1NC

3TF32110XP2  ,16A, 1NC

3TF32110XQ0  ,16A AC380V 50Hz, 1NC

3TF32110XQ2  ,16A, 1NC

3TF32110XR0  ,16A AC415V 50Hz, 1NC

3TF32110XR1  ,16A, 1NC

3TF32110XR2  ,16A, 1NC

3TF32110XS0  ,16A AC500V 50Hz, 1NC

3TF32110XS1  ,16A, 1NC

3TF32110XS2  ,16A, 1NC

3TF32110XU0  ,16A AC240V 50Hz, 1NC

3TF32110XV0  ,16A AC400V 50Hz, 1NC

3TF32111XA4  ,16A

3TF32111XB4  ,16A DC24V

3TF32111XC4  ,16A

3TF32111XD4  ,16A

3TF32111XE4  ,16A

3TF32111XF4  ,16A DC110V

3TF32111XG4  ,16A DC125V

3TF32111XM4  ,16A DC220V

3TF32111XP4  ,16A

3TF32111XV4  ,16A

3TF32111XW4  ,16A DC48V

3TF33000XB0  ,22A AC24V 50Hz

3TF33000XC0  ,22A

3TF33000XC1  ,22A

3TF33000XC2  ,22A AC24V 50/60Hz

3TF33000XD0  ,22A AC42V 50Hz

3TF33000XD2  ,22A AC42V 60Hz

3TF33000XE0  ,22A

3TF33000XF0  ,22A AC110V 50Hz

3TF33000XG0  ,22A AC36V 50Hz

3TF33000XG1  ,22A

3TF33000XG2  ,22A AC110V 50/60Hz

3TF33000XH0  ,22A AC48V 50Hz

3TF33000XJ1  ,22A

3TF33000XJ2  ,22A

3TF33000XK1  ,22A

3TF33000XK2  ,22A

3TF33000XL0  ,22A

3TF33000XL1  ,22A

3TF33000XL2  ,22A AC230V 50/60Hz

3TF33000XM0  ,22A AC220V 50Hz

3TF33000XM1  ,22A

3TF33000XM2  ,22A

3TF33000XN1  ,22A

3TF33000XN2  ,22A AC220V 50/60Hz

3TF33000XP0  ,22A AC230V 50Hz

3TF33000XP1  ,22A

3TF33000XP2  ,22A

3TF33000XQ0  ,22A AC380V 50Hz

3TF33000XS1  ,22A

3TF33001XW4  ,22A DC48V

3TF33110XB0  ,22A AC24V 50Hz, 1NC

3TF33110XC0  ,22A, 1NC

3TF33110XC1  ,22A, 1NC

3TF33110XC2  ,22A AC24V 50/60Hz, 1NC

3TF33110XD0  ,22A AC42V 50Hz, 1NC

3TF33110XD2  ,22A AC42V 60Hz, 1NC

3TF33110XE0  ,22A, 1NC

3TF33110XF0  ,22A AC110V 50Hz, 1NC

3TF33110XG0  ,22A AC36V 50Hz, 1NC

3TF33110XG1  ,22A, 1NC

3TF33110XG2  ,22A AC110V 50/60Hz, 1NC

3TF33110XH0  ,22A AC48V 50Hz, 1NC

3TF33110XJ1  ,22A, 1NC

3TF33110XJ2  ,22A, 1NC

3TF33110XK1  ,22A, 1NC

3TF33110XK2  ,22A, 1NC

3TF33110XL0  ,22A, 1NC

3TF33110XL1  ,22A, 1NC

3TF33110XL2  ,22A AC230V 50/60Hz, 1NC

3TF33110XM0  ,22A AC220V 50Hz, 1NC

3TF33110XM1  ,22A, 1NC

3TF33110XM2  ,22A, 1NC

3TF33110XN1  ,22A, 1NC

3TF33110XN2  ,22A AC220V 50/60Hz, 1NC

3TF33110XN6  ,22A, 1NC

3TF33110XP0  ,22A AC230V 50Hz, 1NC

3TF33110XP1  ,22A, 1NC

3TF33110XP2  ,22A, 1NC

3TF33110XQ0  ,22A AC380V 50Hz, 1NC

3TF33110XQ2  ,22A, 1NC

3TF33110XR0  ,22A AC415V 50Hz, 1NC

3TF33110XR1  ,22A, 1NC

3TF33110XR2  ,22A, 1NC

3TF33110XS0  ,22A AC500V 50Hz, 1NC

3TF33110XS1  ,22A, 1NC

3TF33110XS2  ,22A, 1NC

3TF33110XU0  ,22A AC240V 50Hz, 1NC

3TF33110XV0  ,22A AC400V 50Hz, 1NC

3TF33111XA4  ,22A

3TF33111XB4  ,22A DC24V

3TF33111XC4  ,22A

3TF33111XE4  ,22A

3TF33111XF4  ,22A DC110V

3TF33111XG4  ,22A DC125V

3TF33111XM4  ,22A DC220V

3TF33111XP4  ,22A

3TF33111XV4  ,22A

3TF33111XW4  ,22A DC48V

3TF34000XB0  ,32A AC24V 50Hz

3TF34000XC0  ,32A

3TF34000XE0  ,32A

3TF34000XF0  ,32A AC110V 50Hz

3TF34000XG0  ,32A AC36V 50Hz

3TF34000XH0  ,32A AC48V 50Hz

3TF34000XL0  ,32A

3TF34000XM0  ,32A AC220V 50Hz

3TF34000XM1  ,32A

3TF34000XM2  ,32A

3TF34000XN1  ,32A

3TF34000XN2  ,32A AC220V 50/60Hz

3TF34000XN6  ,32A

3TF34000XP0  ,32A AC230V 50Hz

3TF34000XP1  ,32A

3TF34000XP2  ,32A

3TF34000XQ0  ,32A AC380V 50Hz

3TF34000XQ2  ,32A

3TF34000XR0  ,32A AC415V 50Hz

3TF34000XR1  ,32A

3TF34000XR2  ,32A

3TF34000XS0  ,32A AC500V 50Hz

3TF34000XS1  ,32A

3TF34000XS2  ,32A

3TF34000XU0  ,32A AC240V 50Hz

3TF34000XV0  ,32A AC400V 50Hz

3TF34001XA4  ,32A

3TF34001XB4  ,32A DC24V

3TF34001XC4  ,32A

3TF34001XE4  ,32A

3TF34001XF4  ,32A DC110V

3TF34001XG4  ,32A DC125V

3TF34001XM4  ,32A DC220V

3TF34001XP4  ,32A

3TF34001XV4  ,32A

3TF34001XW4  ,32A DC48V

3TF34110XB0  ,32A AC24V 50Hz, 1NC

3TF34110XC0  ,32A, 1NC

3TF34110XC1  ,32A, 1NC

3TF34110XC2  ,32A AC24V 50/60Hz, 1NC

3TF34110XD0  ,32A AC42V 50Hz, 1NC

3TF34110XD2  ,32A AC42V 60Hz, 1NC

3TF34110XE0  ,32A, 1NC

3TF34110XF0  ,32A AC110V 50Hz, 1NC

3TF34110XG0  ,32A AC36V 50Hz, 1NC

3TF34110XG1  ,32A, 1NC

3TF34110XG2  ,32A AC110V 50/60Hz, 1NC

3TF34110XH0  ,32A AC48V 50Hz, 1NC

3TF34110XK2  ,32A, 1NC

3TF34110XL0  ,32A, 1NC

3TF34110XL1  ,32A, 1NC

3TF34110XL2  ,32A AC230V 50/60Hz, 1NC

3TF34110XM0  ,32A AC220V 50Hz, 1N

3TF34110XQ2  ,32A, 1NC

3TF34110XR0  ,32A AC415V 50Hz, 1NC

3TF34110XR1  ,32A, 1NC

3TF34110XR2  ,32A, 1NC

3TF34110XS0  ,32A AC500V 50Hz, 1NC

3TF34110XS1  ,32A, 1NC

3TF34110XS2  ,32A, 1NC

3TF34110XU0  ,32A AC240V 50Hz, 1NC

3TF34110XV0  ,32A AC400V 50Hz, 1NC

3TF34111XA4  ,32A

3TF34111XB4  ,32A DC24V

3TF34111XW4  ,32A DC48V

3TF35000XB0  ,38A AC24V 50Hz

3TF35000XC0  ,38A

3TF35000XC1  ,38A

3TF35000XE0  ,38A

3TF35000XF0  ,38A AC110V 50Hz

3TF35000XG0  ,38A AC36V 50Hz

3TF35000XG1  ,38A

3TF35000XG2  ,38A AC110V 50/60Hz

3TF35000XH0  ,38A AC48V 50Hz

3TF35000XJ1  ,38A

3TF35000XJ2  ,38A

3TF35000XK1  ,38A

3TF35000XK2  ,38A

3TF35000XL0  ,38A

3TF35000XL1  ,38A

3TF35000XL2  ,38A AC230V 50/60Hz

3TF35000XM0  ,38A AC220V 50Hz

3TF35000XN2  ,38A AC220V 50/60Hz

3TF35000XP0  ,38A AC230V 50Hz

3TF35000XP1  ,38A

3TF35000XP2  ,38A

3TF35000XS2  ,38A

3TF35000XU0  ,38A AC240V 50Hz

3TF35000XV0  ,38A AC400V 50Hz

3TF35001XA4  ,38A

3TF35001XB4  ,38A DC24V

3TF35001XC4  ,38A

3TF35001XE4  ,38A

3TF35001XF4  ,38A DC110V

3TF35001XG4  ,38A DC125V

3TF35001XM4  ,38A DC220V

3TF35001XP4  ,38A

3TF35001XV4  ,38A

3TF35001XW4  ,38A DC48V

3TF35110XC2  ,38A AC24V 50/60Hz, 1NC

3TF35110XD0  ,38A AC42V 50Hz, 1NC

3TF35110XD2  ,38A AC42V 60Hz, 1NC

3TF35110XE0  ,38A, 1NC

3TF35110XF0  ,38A AC110V 50Hz, 1NC

3TF35110XG0  ,38A AC36V 50Hz, 1NC

3TF35110XG1  ,38A, 1NC

3TF35110XG2  ,38A AC110V 50/60Hz, 1NC

3TF35110XJ1  ,38A, 1NC

3TF35110XJ2  ,38A, 1NC

3TF35110XK1  ,38A, 1NC

3TF35110XK2  ,38A, 1NC

3TF35110XL0  ,38A, 1NC

3TF35110XL1  ,38A, 1NC

3TF35110XL2  ,38A AC230V 50/60Hz, 1NC

3TF35110XM0  ,38A AC220V 50Hz, 1NC

3TF35110XN2  ,38A AC220V 50/60Hz, 1NC

3TF35110XP0  ,38A AC230V 50Hz, 1NC