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4 Pin Industrial Connector Supplier

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4 Pin Industrial Connector

Designed for real-world industrial abuse, our Third Generation High‑end Industrial Connectors provide stable connections for power and control circuits in environments where reliability matters most. Choose from heavy‑duty 4‑pin options covering the voltage ranges commonly specified in factories and job sites—110–130V, 220–240V, and 380–415V—along with a variety of current ratings and pole configurations. With IP44 and IP67 protection levels available, these connectors are suited for dusty workshops, damp areas, and outdoor installations. A reinforced housing and well‑engineered earth contact help deliver secure engagement, reduced vibration-related loosening, and long service life. Select the 4 Pin Industrial Connector that matches your system requirements.

_0014_509

SFK-509 / SFK-521 IP44 Safe Voltage Industrial Connector

Earth contact position 4h
Rated current(A) 16 32
Pole 3
Dimension(mm) a 155 195.9
b 81 102.7
c 51.1 64.2
d 49.5 64.2
e 86 101.8
f 34.7 37
g 57 71.2
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
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Current(A):  16A,32A
Voltage(V):  110-130V~2P+E
Protection degree:  IP44

_0013_510

SFK-510 / SFK-522 220–240V Industrial Connector

Earth contact position 6h
Rated current(A) 16 32
Pole 3
Dimension(mm) a 155 195.9
b 81 102.7
c 51.1 64.2
d 49.5 64.2
e 86 101.8
f 34.7 37
g 57 71.2
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
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Current(A):  16A,32A
Voltage(V):  220-240V~2P+E
Protection degree:  IP44

_0012_514

SFK-514 / SFK-526 High-Tension 380–415V Industrial Connector

Earth contact position 6h
Rated current(A) 16 32
Pole 4
Dimension(mm) a 155 195.9
b 81 102.7
c 51.2 64.2
d 55.7 64.2
e 90.4 101.8
f 37 37
g 61.2 71.2
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
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Current(A):  16A,32A
Voltage(V):  380-415V~3P+E
Protection degree:  IP44

_0015_5

SFK-5 / SFK-6 Wide-Range Voltage Industrial Connector

Earth contact position 6h
Rated current(A) 16 32
Pole 4
Dimension(mm) a 160 195
b 86 103.2
c 51 62.8
d 63 70.8
e 97.2 104.9
f 37 37
g 75.5 80
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
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Current(A):  16A,32A
Voltage(V):  220-380V~/240-415V~3P+N+E
Protection degree:  IP44

_0005_1236

SFK-1236 Large-Diameter Cable Entry Industrial Connector

Earth contact position 4h
Rated current(A) 63
Pole 3
Dimension(mm) a 257
b 112.5
c 85
d 77.4
e 108
f 34
g 92
Cable nominal cross-section area(mm²) 10-16
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Current(A):  16A,32A
Voltage(V):  110-130V~2P+E
Protection degree:  IP44

_0004_1237

SFK-1237 Electrical 220–240V Industrial Connector

Earth contact position 6h
Rated current(A) 63
Pole 3
Dimension(mm) a 257
b 112.5
c 85
d 77.4
e 108
f 34
g 92
Cable nominal cross-section area(mm²) 10-16
Contact us
Current(A):  63A
Voltage(V):  220-240V~2P+E
Protection degree:  IP44

_0003_1241

SFK-1241 IP44 High Voltage Industrial Connector

Earth contact position 6h
Rated current(A) 63
Pole 4
Dimension(mm) a 257
b 112.5
c 85
d 77.4
e 108
f 34
g 92
Cable nominal cross-section area(mm²) 10-16
Contact us
Current(A):  63A
Voltage(V):  380-415V~3P+E
Protection degree:  IP44

_0002_1245

SFK-1245 IP44 Electrical Safety Industrial Connector

Earth contact position 6h
Rated current(A) 63
Pole 5
Dimension(mm) a 257
b 112.5
c 85
d 77.4
e 108
f 34
g 92
Cable nominal cross-section area(mm²) 10-16
Contact us
Current(A):  63A
Voltage(V):  220-380V~/240-415V~3P+N+E
Protection degree:  IP44

_0011_539

SFK-539 / SFK-551 IP67 2P+E Waterproof Industrial Connector

Earth contact position 4h
Rated current(A) 16 32
Pole 3
Dimension(mm) a 158.6 199.2
b 81 102.7
c 54.7 67.5
d 49.5 64.2
e 71.7 95.5
f 79.6 98.7
g 34.7 37
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
Contact us
Current(A):  16A,32A
Voltage(V):  110-130V~2P+E
Protection degree:  IP67

_0010_540

SFK-540 / SFK-552 IEC60309 Standard Voltage 220–240V Industrial Connector

Earth contact position 6h
Rated current(A) 16 32
Pole 3
Dimension(mm) a 158.6 199.2
b 81 102.7
c 54.7 67.5
d 49.5 64.2
e 71.7 95.5
f 79.6 98.7
g 34.7 37
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
Contact us
Current(A):  16A,32A
Voltage(V):  220-240V~2P+E
Protection degree:  IP67

_0009_544

SFK-544 / SFK-556 3P+E Three-Phase Industrial Connector

Earth contact position 6h
Rated current(A) 16 32
Pole 4
Dimension(mm) a 158.6 199.2
b 80.6 102.7
c 54.9 67.5
d 55.7 64.2
e 80.6 95.5
f 85.2 98.7
g 37 37
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
Contact us
Current(A):  16A,32A
Voltage(V):  380-415V~3P+E
Protection degree:  IP67

_0008_550

SFK-550 / SFK-562 3P+N+E Power Distribution Industrial Connector

Earth contact position 6h
Rated current(A) 16 32
Pole 5
Dimension(mm) a 142 200
b 119 103.2
c 56 67.8
d 63 70.8
e 89 102
f 92.8 104.9
g 37 37
Cable nominal cross-section area(mm²) 1.5-2.5 4-6
Contact us
Current(A):  16A,32A
Voltage(V):  220-380V~/240-415V~3P+N+E
Protection degree:  IP67

About
Wenzhou Shangfeng Electric Co.,Ltd.
Wenzhou Shangfeng Electric Co.,Ltd.
Wenzhou Shangfeng Electric Co.,Ltd. is located in Liushi, the "Chinese Electrical Capital", adjacent to the Yongtaiwen Expressway and National Highway 104, the largest port in Wenzhou - Qili Port in the south, and the Wenzhou Airport and Railway Station in the west. The sea, land, and air transportation is very convenient.
As China Third Generation High-end Industrial Connectors suppliers and Third Generation High-end Industrial Connectors factory, we are mainly engaged in wholesale Third Generation High-end Industrial Connectors, The company has introduced advanced technology and equipment, passed the ISO9001 international quality system, China Quality Certification Center CQC certification, and obtained the European Community CE safety certification, ROHS environmental protection directive certification, and continuously introduced senior technical personnel and enterprise management personnel, and has gradually acquired production technology. The company specializes in producing industrial plugs, sockets, couplers (connectors), nylon cable ties, and other products. The company strictly follows international standards such as IEC60309, EN60309, and CEE17 and national standards such as GB11918 and GB11919. The product design is unique and the structure is reasonable.
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