High Current Solid State Relay LSR-3-1-3400DA SSR 3-Phase 400A 440VAC 50-60Hz Panel Mount Explosion Proof Custom R&D Design
High Current 3-Phase SSR 400A 440VAC — R&D Engineered, Cost Optimized
400A Continuous · Explosion Proof · Semi-Permanent Life · We Design Your Power System
???? 400A Continuous — Engineered to Your System, Not Just Off the Shelf
This is a 400A continuous-rated 3-phase SSR for the most demanding industrial power control applications. But we do not just sell you a standard part — our R&D team partners with your engineers to design the complete switching solution. From current rating (up to 600A) to control interface, thermal management, and explosion-proof enclosure — we customize every aspect and optimize the design to lower your total system cost without cutting corners on reliability.
Key Specifications
| Parameter | Value |
|---|---|
| Load Rating | 400A 440VAC 50/60Hz (Up to 600A Custom) |
| Phase | 3-Phase Single Pole |
| Control | 3-32VDC / 4-20mA / 0-10V |
| Isolation | 4000VAC Input to Output |
| Life | Semi-Permanent (Solid State) |
| Protection | Corrosion · Vibration · Explosion Proof |
⚡ 400A-600A Range
We engineer SSRs from 200A to 600A for any industrial heating, motor control, or power distribution application.
???? BOM Cost Optimization
Our R&D team reviews your system design to right-size the SSR — eliminating over-spec costs while ensuring margins.
???? Thermal Engineering
Custom heat sink, forced-air, and liquid cooling options for continuous 400A operation in demanding environments.
????️ Ruggedized Design
Explosion-proof, corrosion-resistant, vibration-proof — certified for oil & gas, chemical, and heavy industry.
Let Our R&D Team Engineer Your High-Current SSR Solution
Tell us your current, voltage, and control requirements. We design a complete, cost-optimized power switching solution — not just a component.
???? Contact R&D → MOQ: 10pcs | Custom Design: 2-3 Weeks
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.