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The Clipsal MX9SP140 is a single-pole surge protection device rated 240V AC 50/60Hz, designed to protect electrical distribution circuits from lightning strikes and transient voltage surges. The MX9SP140 is Type 2 classified (distribution-level protection), with a maximum discharge capacity of 40kA, and is compatible with TN-C, TN-S, and TT earthing systems in residential and commercial installations.
Modern Australian homes contain thousands of dollars' worth of sensitive electronics. Fridges, washing machines, dishwashers, air-conditioning units, and smart appliances all depend on electronic components vulnerable to voltage surges. While power-board surge protectors offer limited protection to plugged-in devices, hardwired circuits remain unprotected. A single lightning strike can destroy multiple circuits at once, leaving homes without power. A Type 2 surge protection device at the main or sub-board level protects the entire circuit from the source.
Licensed electricians fit MAX9 surge arrestors at distribution level to shield multiple circuits in one go and reduce callbacks. The 40kA discharge rating handles the most severe Australian lightning surges without nuisance operation. The modular 18mm width fits tight enclosures on modern switchboards, ideal for retrofit work. Quick cartridge replacement means customers are back online fast after a surge event, without replacing the entire device.
The Clipsal MX9SP140 is not designed for endpoint protection or as a replacement for power-board surge protectors. Do not install for protection of individual power points or for low-voltage DC circuits. Type 2 protection operates at the main and sub-distribution level only; it does not protect individual appliances plugged into power outlets.
Verified Sparky Direct customer reviews: Clipsal MX9SP140 MAX9 SPD 1P 40kA (MX9SP140)
"Works as expected and happy with prompt delivery and tracking information." — Malcolm
"Good quality - look great in the switch board." — Glenn
"Good product easy to install." — Mick
(MX9SP140)
Type 1 SPDs are for lightning strike direct contact (between the mains entry and isolator). Type 2 devices protect distribution circuits (the MX9SP140 fits here). Type 3 devices protect individual outlets and appliances. Most homes need Type 2 at the board plus Type 3 in power boards for complete protection.
Installation of the MX9SP140 must be carried out by a licensed electrician. The device is fitted into a 240V AC switchboard alongside circuit breakers and RCBOs, and requires safe isolation procedures and compliance with AS/NZS 3000. Never attempt to install electrical protection devices yourself.
Yes. The MX9SP140 is rated for TN-C, TN-S, and TT earthing systems, covering all standard Australian configurations (PME, TNS, IT, and direct earth). Your licensed electrician will confirm your site's earthing system during installation.
When installed at the main switchboard, the MX9SP140 protects all circuits downstream of that point. If installed at a sub-board, it protects only that sub-board's circuits. Your electrician will recommend the best location based on your home's layout and risk profile.
No. The MX9SP140 uses a replaceable cartridge design. After a strike, only the cartridge is replaced (spare part MX9SP40C available), not the entire device. The modular mounting makes cartridge swap quick and low-cost.
No. The MX9SP140 is Type 2 distribution protection. It protects the electrical circuits in your walls and appliances hard-wired to the board (fridges, ovens, washing machines). Power boards are Type 3 endpoint protection for plugged-in devices (laptops, chargers, entertainment gear). Both are recommended for complete home protection.
The device has a signal flag and dual signal contacts (1 NO + 1 NC) that indicate cartridge wear. Most cartridges last many years under normal operation (no surges). After a surge event, the signal flag flips and the contacts open, indicating immediate replacement is needed. A licensed electrician can swap the cartridge in minutes.
The Clipsal MX9SP140 is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.
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Warranty starts from Invoice Date
Domestic Use: 7 Year
Commercial Use: 7 Year
Warranty Method: Clipsal in home warranty
These specifications and characteristics outline physical, mechanical, electrical details.
| Brand | Clipsal by Schneider Electric |
| SKU | MX9SP140 |
| Model # | MX9SP140 |
| Barcode # | 9311554814199 |
| Package Weight | 0.130kg |
| TYPE | VALUE |
|---|---|
| Type | Circuit Protection |
| Brand | Clipsal by Schneider Electric |
| Range | Clipsal - Max9 |
| Rated Current (A) | 40kA |
| Height (mm) | 85 |
| Width (mm) | 18 |
| Depth (mm) | 64 |
| Mounting | DIN Rail Clip-on |
| Voltage (V) | 240Vac |
| Earth Leakage Protection Class | Type 2 |
| Poles | 1P |
| Equivalent Max 4 Reference | 940RMT/1 |
| Equivalent Hager Reference | SPN140D |
Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.
Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.
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