|
|
LED 패널 장착 인디케이터 K50 Pro Compact Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
- K50CL2RGB7
- Banner Engineering
-
1:
₩182,400
-
1재고 상태
|
Mouser 부품 번호
778-K50CL2RGB7
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Compact Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
|
|
1재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Panel
|
Wire
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
- K50L2RGB7A1QP
- Banner Engineering
-
1:
₩228,000
-
1재고 상태
|
Mouser 부품 번호
778-K50L2RGB7A1QP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
|
|
1재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Compact with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 4-pin M12 Integral QD
- K50CL2RGBKQ
- Banner Engineering
-
1:
₩200,640
-
10재고 상태
|
Mouser 부품 번호
778-K50CL2RGBKQ
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Compact with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 4-pin M12 Integral QD
|
|
10재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
|
Thread
|
Cable
|
150 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Select: 7-color RGB Indicator; 10-30 V dc; Polycarbonate; IP66, IP67, IP69K; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
- K50PSLRGB7Q
- Banner Engineering
-
1:
₩156,560
-
101재고 상태
-
신제품
|
Mouser 부품 번호
778-K50PSLRGB7Q
신제품
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Select: 7-color RGB Indicator; 10-30 V dc; Polycarbonate; IP66, IP67, IP69K; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
|
|
101재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Green, Red, Yellow, blue, White, Cyan, Magenta
|
Quick Connect
|
5 Pin-M12
|
|
|
K50 Pro
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP67; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
- K50L2RGB7ALSQ
- Banner Engineering
-
1:
₩262,960
-
89재고 상태
|
Mouser 부품 번호
778-K50L2RGB7ALSQ
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP67; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
|
|
89재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
- K50L2RGB7
- Banner Engineering
-
1:
₩182,400
-
19재고 상태
|
Mouser 부품 번호
778-K50L2RGB7
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
|
|
19재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Panel
|
Wire
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Colors: Multicolor; 4-pin M12 Integral QD
- K50L2RGBKQ
- Banner Engineering
-
1:
₩218,880
-
33재고 상태
|
Mouser 부품 번호
778-K50L2RGBKQ
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Colors: Multicolor; 4-pin M12 Integral QD
|
|
33재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Thread
|
Cable
|
150 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator FDA; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
- K50L2FRGB7
- Banner Engineering
-
1:
₩200,640
-
3재고 상태
|
Mouser 부품 번호
778-K50L2FRGB7
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator FDA; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
|
|
3재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Panel
|
Wire
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator FDA; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
- K50L2FRGB7QP
- Banner Engineering
-
1:
₩249,280
-
1재고 상태
|
Mouser 부품 번호
778-K50L2FRGB7QP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator FDA; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
|
|
1재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
- K50L2RGB7AL1
- Banner Engineering
-
1:
₩244,720
-
8재고 상태
|
Mouser 부품 번호
778-K50L2RGB7AL1
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
|
|
8재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Panel
|
Wire
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
- K50L2RGB7AL1Q
- Banner Engineering
-
1:
₩244,720
-
5재고 상태
|
Mouser 부품 번호
778-K50L2RGB7AL1Q
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
|
|
5재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
- K50L2RGB7ALS
- Banner Engineering
-
1:
₩262,960
-
7재고 상태
|
Mouser 부품 번호
778-K50L2RGB7ALS
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
|
|
7재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Panel
|
Wire
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
- K50L2RGB7QP
- Banner Engineering
-
1:
₩186,960
-
4재고 상태
-
2예상 2026-06-17
|
Mouser 부품 번호
778-K50L2RGB7QP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
|
|
4재고 상태
2예상 2026-06-17
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
- K50L2RGBKQP
- Banner Engineering
-
1:
₩206,720
-
5재고 상태
|
Mouser 부품 번호
778-K50L2RGBKQP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
|
|
5재고 상태
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Thread
|
Quick Connect
|
150 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
- K50L2RGB7Q
- Banner Engineering
-
1:
₩199,120
-
138주문 중
|
Mouser 부품 번호
778-K50L2RGB7Q
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
|
|
138주문 중
주문 중:
62 예상 2026-06-15
76 예상 2026-06-22
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
- K50L2RGB7A1Q
- Banner Engineering
-
1:
₩221,920
-
14예상 2026-05-25
|
Mouser 부품 번호
778-K50L2RGB7A1Q
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
|
|
14예상 2026-05-25
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Compact Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
- K50CL2RGB7Q
- Banner Engineering
-
1:
₩182,400
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50CL2RGB7Q
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Compact Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 5-pin M12 Integral QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Compact Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
- K50CL2RGB7QP
- Banner Engineering
-
1:
₩186,960
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50CL2RGB7QP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Compact Series: 7-color RGB Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Compact with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
- K50CL2RGBKQP
- Banner Engineering
-
1:
₩206,720
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50CL2RGBKQP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Compact with IO-Link Series: RGB Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
|
Thread
|
Quick Connect
|
150 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Indicator FDA; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
- K50L2FRGBKQP
- Banner Engineering
-
1:
₩267,520
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50L2FRGBKQP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Indicator FDA; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Red, Green, Blue
|
Thread
|
Quick Connect
|
150 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
- K50L2RGB7A1
- Banner Engineering
-
1:
₩221,920
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50L2RGB7A1
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Input: Bimodal; Colors: Multicolor; 2 m (6.5 ft) Integral Cable
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Panel
|
Wire
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
- K50L2RGB7AL1QP
- Banner Engineering
-
1:
₩249,280
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50L2RGB7AL1QP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP50; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
- K50L2RGB7ALSQP
- Banner Engineering
-
1:
₩267,520
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50L2RGB7ALSQP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro Series: 7-color RGB Audible Indicator; Voltage: 10-30 V dc; Housing: Polycarbonate; IP66 IP67 IP69K; Tone: Loud Steady; Input: Bimodal; Colors: Multicolor; 150 mm (6 in) 5-pin M12 PVC Pigtail QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
Multicolor
|
Quick Connect
|
Cable
|
220 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Audible Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Colors: Multicolor; 4-pin M12 Integral QD
- K50L2RGBKA1Q
- Banner Engineering
-
1:
₩244,720
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50L2RGBKA1Q
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Audible Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Colors: Multicolor; 4-pin M12 Integral QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
|
Thread
|
Cable
|
150 mA
|
|
K50 PRO
|
|
|
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Audible Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
- K50L2RGBKA1QP
- Banner Engineering
-
1:
₩249,280
-
비재고 리드 타임 6 주
|
Mouser 부품 번호
778-K50L2RGBKA1QP
|
Banner Engineering
|
LED 패널 장착 인디케이터 K50 Pro with IO-Link Series: RGB Audible Indicator; Voltage: 18 - 30 V dc; Housing: Polycarbonate; IP50; Tone: Steady; Colors: Multicolor; 150 mm (6 in) 4-pin M12 PVC Pigtail QD
|
|
비재고 리드 타임 6 주
|
|
최소: 1
배수: 1
|
|
|
Indicators
|
|
Thread
|
Cable
|
150 mA
|
|
K50 PRO
|
|
대한민국