Electrically, a breaker’s rated voltage is a maximum, so a 230/400 V MCB can often operate on a lower-voltage circuit — but that is not the real problem. In Mexico, most of Brazil, Colombia and Central America the barriers are local certification (for example NOM, INMETRO and RETIE), local installation practice, and voltage-dependent parts such as contactor coils, SPDs and meters that must match the actual system. That is why HAZAM focuses on 220–240 V markets and says so before quoting.
Key facts
- A rated voltage such as 230/400 V is the highest voltage the device is designed for, not the only voltage it can see.
- Mexico, most of Brazil, Colombia, Central America and the Caribbean are mostly 110–127 V, 60 Hz systems.
- Peru is 220 V but 60 Hz; Saudi Arabia is 230/400 V at 60 Hz with many older sites still on 127 V.
Where the real problems are
| Item | Voltage-sensitive? | Why it matters |
|---|---|---|
| MCB / MCCB (230/400 V rating) | Not usually by itself | The rating is a maximum — but the product still needs the destination’s certification and must suit local installation practice |
| Contactor coil | Yes | Coil voltage and frequency must match the control supply; the wrong coil hums, overheats or fails — see coil voltage and 50 / 60 Hz |
| SPD | Yes | Uc must be sized against the real system voltage — see SPD types |
| Meters and electronic relays | Yes | Firmware and measuring range may assume 230 V / 50 Hz |
| Certification | Yes | Local schemes (for example NOM, INMETRO, RETIE) decide whether goods can be sold and installed |
What this means for your order
- If your site is genuinely 220–240 V, tell us the exact voltage, frequency and phases, and we quote for it — including 60 Hz coil variants for Saudi Arabia and Peru.
- If your site is 110–127 V, we say so in the first reply and decline, rather than sell you equipment that may not clear customs or suit the installation.
- If you are not sure, send the nameplate of the existing board and the country; we will check before you spend anything.
See which markets we ship to in the market guides, including South America’s 220–230 V / 50 Hz band (Argentina, Chile, Paraguay, Uruguay, Bolivia).
Frequently asked questions
Can I run a 230 V MCB on 120 V?
The breaker’s voltage rating is a maximum, so lower-voltage operation is generally possible electrically. Whether it may be sold or installed in your country depends on local certification and practice, and voltage-dependent parts elsewhere in the board must still match.
Which of your markets run at 60 Hz?
Saudi Arabia (230/400 V) and Peru (220 V). Contactor coils and meters need 60 Hz variants there; MCBs are frequency-insensitive.
Do you ship to Mexico, Brazil or Colombia?
No — we focus on 220–240 V markets and say so in the first reply when a project falls outside them.
Get a real quotation, not a brochure.
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Reviewed by the HAZAM technical team, October 2026. CHINT, DELIXI and TENGEN are trademarks of their respective owners. HAZAM is a first-tier authorised distributor of CHINT products; the authorisation certificate is available on request from our sales manager. Ratings and designations refer to published manufacturer documentation; the certificate for your exact ordering code governs.