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TENGEN TGM3DC-400 400A 2 Pole 500V DC MCCB 35kA
AED 700.00
- Genuine TENGEN TGM3DC-400M — moulded-case DC breaker certified to IEC 60947-1 / 60947-2
- 400A · 2-pole · 500V DC · 35kA breaking capacity (Icu), Ics/Icu = 100%
- Larger 400-frame body (approx. 150 × 257 × 150 mm) — built for higher-current DC circuits
- Built-in isolation function; for solar PV arrays, combiner boxes and DC power systems
- In stock in Dubai — fast UAE & GCC dispatch; manufacturer datasheet on request
Availability:
In stock
SKU
MAS330021800796
The TENGEN TGM3DC-400M/2300 (400A) is a 400A, 2-pole moulded-case DC circuit breaker rated for 500V DC, built for switching, isolation and overcurrent protection in higher-current direct-current systems — solar photovoltaic arrays, combiner boxes, and DC power and communication systems. It uses a DC-rated magnetic-blowout arc-extinguishing design to safely interrupt the sustained arc a DC fault produces, which a standard AC breaker cannot do. It is certified to IEC 60947-1 and IEC 60947-2 and carries a built-in isolation function, so it can also serve as a load-break isolator in the DC circuit. As a 400-frame device it is physically larger than the 250-frame — plan panel space and busbar layout accordingly.
Quick Specs
- Brand / Model: TENGEN TGM3DC-400M/2300
- Rated current (In): 400A
- Poles: 2P
- Rated operating voltage (Ue): 500V DC (2-pole; frame rated DC250/500V)
- Rated insulation voltage (Ui): 1000V
- Rated impulse withstand voltage (Uimp): 12kV
- Breaking capacity (Icu): 35kA at DC500V (50kA at DC250V), M-type
- Ics / Icu: 100%
- Isolation function: Yes (per IEC 60947-2)
- Utilisation category: A
- Service life: 5,000 mechanical / 1,000 electrical operations
- Outline dimensions (2P): approx. 150 (W) x 257 (L) x 150 (H) mm
- Panel mounting screw: M10
- Mounting: Fixed, front-panel wiring
- Standard: IEC 60947-1 / IEC 60947-2
Applications & Compatibility
- Main DC protection and isolation for larger solar PV strings and arrays operating up to 500V DC, where load current exceeds the 250-frame range.
- Combiner-box and inverter-input protection at currents up to 400A.
- DC power distribution and communication DC systems requiring reliable overload and short-circuit protection.
- 2-pole configuration: both poles are wired into the DC circuit so their arc-breaking capability combines to interrupt the full 500V DC — do not switch a 500V DC circuit through a single pole.
- For systems above 500V DC (e.g. 750V or 1000V DC), the 4-pole TGM3DC-400 version is required — the 2-pole model is rated to 500V DC.
- Operates at up to 50°C without derating; derating factors apply above 50°C and above 2000m altitude.
Why Buy From Electrical Junction
- Genuine TENGEN product sourced directly through our Mumbai import pipeline (MAS Global Enterprises) — a cost-effective, IEC-certified DC breaker without grey-market risk.
- Held in stock in Dubai for fast dispatch across the UAE and wider GCC, with the manufacturer datasheet available on request.
- DC breaker sizing, pole count and voltage rating can be checked by our engineer before you order — so the frame, current rating and fault capacity match your system. Export and international queries are handled directly by our technical contact, not a ticket queue.
Frequently Asked Questions
Can this 2-pole 400A breaker be used on a 1000V DC solar system?
No. In this series the 2-pole version is rated to a maximum of 500V DC. For 750V DC or 1000V DC systems, the 4-pole TGM3DC-400 version is required, where poles are connected in series to handle the higher DC voltage. Contact us and we will supply the correct pole configuration for your system voltage.
What does the 35kA rating mean, and does it change with voltage?
35kA is the rated ultimate breaking capacity (Icu) at 500V DC for this M-type 400-frame breaker — the maximum DC fault current it can safely interrupt. At 250V DC the same breaker offers a higher 50kA. Because Ics/Icu is 100%, it can break its rated fault current and remain in service. Select the breaker so its Icu exceeds the prospective short-circuit current at your installation point.
When should I choose the 400A frame instead of the 250A?
Choose the 400-frame when your continuous DC load current is above the 250-frame range (up to 250A) and up to 400A. The 400-frame is a physically larger device (approx. 150 mm wide versus around 78 mm for the 250-frame) and uses M10 mounting, so allow for the extra panel space and heavier busbar connections when specifying it.
Can this breaker also be used as a DC isolator?
Yes. The TGM3DC-400 has a built-in isolation function certified to IEC 60947-2, so in addition to overload and short-circuit protection it can be used to safely isolate the DC circuit for maintenance.
More Information
| SKU | MAS330021800796 |
|---|---|
| Weight (kg) | 4.800000 |
| Manufacturer | TenGen |
| Network Type | DC |
| Number Of Poles | 2P |
| Dc_operating_voltage | 500V DC |
| Model Number | TGM3DC-400M/2300 400A |
| RATED AMPERE (A) | 400 |
| Circuit Breaker Type | MCCB Breakers |
| Mounting Mode | Fixed |
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