The SP21 connector’s sealed housing prevents dust, water, and corrosion, making it ideal for outdoor devices, industrial machines, marine electronics, and mobile equipment requiring reliable high-performance connectivity.
Available in male, female, straight, angled, and panel-mount configurations, SP21 connectors provide flexible installation for control cabinets, junction boxes, and cable assemblies in compact or space-constrained applications.
Constructed from flame-retardant PC/Nylon66 and reinforced PPS inserts, the SP21 maintains structural integrity under vibration, high humidity, and temperature variation, ensuring reliable performance for years.
Solder-type contacts allow quick and precise wire termination, providing stable signal and power transmission for OEM devices, sensors, field instruments, and maintenance-friendly installations.
Gold-plated brass contacts offer low resistance, corrosion protection, and consistent conductivity, enabling SP21 connectors to handle data signals and low-to-medium power applications reliably.
| Feature | Specification |
| Housing Material | Thermoplastic PC, PA66; Flame Retardant Rating: V-0 |
| Pin Material | Brass/Phosphor Bronze with Gold Plating |
| Sealing Material | Epoxy Resin/Rubber |
| Connection Method | Threaded Locking |
| Wiring Method | Soldering/Screw Crimping |
| Contact Resistance | ≤5mΩ |
| Mating Cycles | ≥500 times |
| Insulation Resistance |
≥100mΩ
|
| Operating Temperature | -25℃ ~ +85℃ |
| Straight Male Plug | Straight Female Plug |
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| Straight Mating Male Plug | Straight Mating Female Plug |
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| Angled Male Plug | Angled Female Plug |
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| Front Mount Male Socket | Front Mount Female Socket |
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| 2-Hole Flange Mount Male Receptacle | 2-Hole Flange Mount Female Receptacle |
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| Pins | 2 |
3 | 4 | 5 | 5B |
5C | 7 |
7B | 9 |
12 | 14 |
| Front view of insulator |  |
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Rated Current(A) |
30 | 30 | 30 | 30 | 5×2 30×3 |
15 | 15 | 15×3 5×4 |
5 | 5 | 5 |
|
Contact diameter(mm) |
φ3×2 | φ3×3 | φ3×4 | φ3×5 |
φ3×2 |
φ2×5 | φ2×7 |
φ2×3 |
φ1×9 | φ1×12 | φ1×14 |
|
Operating voltage(AC.V) |
380 | 380 | 380 | 380 | 380 | 380 | 380 | 380 | 500 | 400 | 400 |
|
Pressure resistance(AC.V) 1 min |
1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1200 | 1200 |
|
Contact resistance(mΩ) |
1 | 1 | 1 | 1 | 1×2 3×3 |
2.5 | 2.5 | 2.5×3 5×4 |
5 | 5 | 5 |
|
Wiring method |
Solder and screw crimping | Solder and screw crimping | Solder and screw crimping | Solder and screw crimping | Solder and screw crimping | Solder | Solder | Solder |
Solder |
Solder |
Solder |
|
Welding line gauge(mm²/AWG) |
≤4.17/11 | ≤4.17/11 | ≤4.17/11 | ≤4.17/11 | ≤0.75/18 ≤4/12 |
≤2/14 | ≤2/14 | ≤2/14 ≤0.785/18 |
≤0.785/18 | ≤0.785/18 | ≤0.785/18 |
|
Screw crimping gauge(mm²/AWG) |
≤1.5/15 | ≤1.5/15 | ≤1.5/15 | ≤1.5/15 | - | - | - | - | - | - | - |
Industrial Automation & Machinery
For sensors, actuators, control panels, and robotic equipment requiring durable circular connections.
Outdoor LED & Lighting Systems
Ensures waterproof connectivity for LED street lights, landscape lighting, and outdoor displays.
Marine & Mobile Equipment
Provides corrosion-resistant, vibration-proof connection for boats, vehicles, and field devices.
IoT & Portable Instruments
Connects small IoT nodes, handheld measurement devices, and embedded systems reliably in outdoor or harsh conditions.
Renewable Energy & Environmental Monitoring
Suitable for solar modules, wind sensors, weather stations, and outdoor monitoring devices.
