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11B31040048 - 4P CONTACTOR B310. 4 00 48V
MPN: 11B31040048
Alt. SKU: B31040048
Why Choose the 11B31040048?
Lovato’s B310 four-pole contactor (SKU 11B31040048) delivers dependable high-current switching for demanding control panels. With a 48 V AC/DC coil, it achieves an IEC AC1 operating current of 450 A and AC3 performance of 320 A at 400 V (170 kW). Rated insulation is 1000 V with 8 kV impulse withstand, and screw mounting simplifies secure installation while maintaining compliance to IEC/EN and UL/CSA standards.
Engineered for longevity and resilience, the 11B31040048 offers a mechanical life of 10,000,000 cycles, operates from −50 to 70°C, and is suitable up to 3000 m altitude (pollution degree 3). Terminals accept 35 Nm tightening torque, ensuring robust connections, while a 250 HP rating at 480 V supports North American motor duties. At just 1110 g, it integrates cleanly into space‑conscious assemblies.
Key Benefits
- High AC1 rating 450 A for heavy resistive load switching.
- Robust AC3 performance 320 A/170 kW at 400 V for motors.
- Dual 48 V AC/DC coil simplifies control circuit design.
- Wide operating temperature -50 to 70°C for harsh environments.
- High insulation 1000 V Ui and 8 kV impulse withstand.
- Long mechanical life 10 million cycles for reduced maintenance.
- UL 250 HP at 480 V supports North American installations.
- Screw mounting with 35 Nm terminals for secure connections.
Technical Specification
- Product type designation: B310
- Number of poles: 4
- Rated insulation voltage Ui (IEC/EN): 1000 V
- Rated impulse withstand voltage Uimp: 8 kV
- Ith (IEC): 450 A
- Terminal tightening torque: 35 to 35 Nm
- Weight: 1110 g
- Mechanical life: 10000000 cycles
- Operating temperature: -50 to 70 °C
- Storage temperature: -60 to 80 °C
- Max altitude: 3000 m
- Pollution degree: 3
What’s Included
- Lovato B310 four-pole contactor (SKU 11B31040048)
- Integrated 48 V AC/DC coil
- Manufacturer documentation and datasheet
- Standard factory packaging
Applications
- Motor starters up to 170 kW at 400 V (AC3)
- Switching resistive loads up to 450 A (AC1)
- Pumps, fans, compressors and conveyors control panels
- HVAC and building services distribution boards
- Heavy-duty industrial automation and power switching
Frequently Asked Questions
What coil voltage and type does the Lovato 11B31040048 use?
It has an integrated 48 V AC/DC coil, compatible with AC or DC control supplies.
What are the main current and power ratings?
IEC AC1 is 450 A, while AC3 at 400 V is 320 A / 170 kW.
Which standards does this contactor conform to?
It complies with IEC/EN 60947-1 and 60947-4-1, plus UL 60947-1/-4-1 and CSA equivalents.
What are the environmental operating limits?
Operating temperature is −50 to 70°C; storage −60 to 80°C; max altitude 3000 m; pollution degree 3.
How is it mounted and what is the terminal torque?
It uses screw mounting, and terminals require 35 Nm tightening torque as specified.
Safety note: Installation and commissioning must be performed by qualified personnel. Isolate power before work, follow the manufacturer’s instructions and relevant IEC/UL/CSA standards, tighten terminals to 35 Nm, and observe stated temperature and altitude limits.
| Manufacturer Part Number | 11B31040048 |
|---|---|
| Manufacturer | Lovato |
| HS Code | 85365080 |
| Barcode | 8013975075258 |
| Alternative Product SKU | B31040048 |
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