DC SPD 1000V In=20KA Imax=40KA CARTRIDGE Surge Protection Devices YCS6-C

For on-grid solar strings, hybrid inverters and higher-voltage DC combiner work in Pakistan, that makes it a practical service part rather than a decorative spare.

The buying logic here is different from a full DC SPD. A cartridge is for maintenance and restoration. If your base remains sound and only the plug-in protection element needs replacement, the cartridge keeps the protection system alive at lower replacement cost and with less panel disturbance. That matters on solar sites where downtime, rewiring and service visits cost more than the part itself.

Key Features

• Nominal discharge current In 20kA and maximum discharge current Imax 40kA.
• Best suited to restoring a compatible solar DC SPD after surge stress.
• Useful for 1000V-class PV systems where 600V cartridges are not enough.
• 35mm rail-mounted SPD families in this class are common in solar DB bundles and combiner boards.
• A service spare like this helps avoid replacing the whole surge device body when only the protection module needs renewal.
• More suitable for higher-voltage PV strings than the nearby 600V cartridge option.

Technical Specifications

Product Range and Local Pricing

Applications — Where to Use This DC SPD Cartridge

This 1000V cartridge belongs in PV protection work where the installed surge device is already in service and the cartridge is the part that needs renewal. In Lahore and Islamabad, that often means rooftop on-grid systems after repeated surge events or after inspection shows the protection module needs replacement. In Karachi and Faisalabad, it can mean service work in dusty commercial solar boards, inverter rooms and textile-unit solar distribution panels where 1000V-class DC strings are more common than the smaller 600V class.

How to Choose the Right DC SPD Cartridge

DC SPD Cartridge vs Alternatives — Why CNC?

What This Product Does NOT Protect Against

This cartridge does not replace a whole SPD base, does not replace a DC breaker, and does not solve wrong earthing, poor string design, or bad solar DB layout. It also does not protect anything by itself if it is not installed inside a compatible surge-protection assembly. If the SPD base is damaged, overheated, cracked or incompatible, a new cartridge alone is not the right repair.

You still need the correct DC SPD base/module, the right DC breaker, the right DC isolator, and a proper solar DB / enclosure. A replacement cartridge is a maintenance part, not the whole protection design.

Installation Guide

1. Confirm that the installed protection stage actually needs a replacement cartridge and that the base remains serviceable.
2. Verify that the existing DC SPD system is the correct voltage class before selecting a 1000V cartridge.
3. Isolate the solar DC side safely using the correct DC isolator and follow safe PV shutdown practice.
4. Replace the spent cartridge only in a compatible base. Do not force mismatched parts.
5. Inspect the enclosure, terminations and other protection devices before re-energising the DC side.

Complete Your Solar Protection Setup

Frequently Asked Questions

1. What is a DC SPD cartridge used for?

It is used to restore a compatible surge-protection stage after the replaceable protection module has taken surge stress and needs renewal.

3. What is the difference between the 600V and 1000V cartridge?

The main difference is voltage class. The 1000V cartridge is for higher-voltage PV protection stages where a 600V cartridge would not be the correct match.

4. Can I use this cartridge without an SPD base?

No. A cartridge is a replacement module, not a complete standalone protection device.

5. Is this suitable for solar systems in Pakistan?

Yes, where the installed DC SPD system is a compatible 1000V solar protection stage and only the replaceable cartridge needs renewal.

6. Does this cartridge replace a DC breaker?

No. Surge protection and overcurrent protection are not the same job. You still need the correct DC breaker in the PV protection layout.

7. How do I know if my SPD needs only a cartridge and not the full unit?

Check whether the base and assembly remain serviceable. If the base is damaged, overheated, or incompatible, replace the full SPD stage rather than only the cartridge.

8. Is this better than buying a generic cartridge from the open market?

It is safer to match the replacement cartridge to the installed protection family and voltage class than to buy a generic spare with uncertain compatibility.

This 1000V DC SPD cartridge is the right buy when your solar protection stage needs a proper replacement module rather than a complete new SPD assembly. It fits maintenance work on higher-voltage PV protection layouts where the cartridge is the spent part and the base remains serviceable. For stock confirmation, compatibility checks and service advice, contact CNC Electric Pakistan on WhatsApp 0326-1111376. Orders above Rs.10,000 qualify for free delivery.