DC 2 Pole MCB 500V | Solar PV Breaker

DC 2 Pole MCB 500V is the core safety breaker used on the DC side of solar systems to disconnect and protect strings from overcurrent and short-circuit faults. The CNC Electric YCB8-63PV is built for solar PV use, DIN-rail mounting, and comes in 4 real variants on this page: 20A, 32A, 40A, and 63A — all at Rs.1,600. It is a practical solar breaker for homes and commercial sites in Pakistan where solar power feeds inverters running ACs, fridges, pumps, and UPS charging.

Quick Specs

Variants & Prices (Live on Shopify)

All four ratings are the same price on this page. Pick the variant that matches your string current, cable size, and inverter manufacturer recommendation — not by guessing bigger is safer.

What This Product Does

This DC circuit breaker is installed between the solar PV side and the rest of the system so a fault on a string can be isolated quickly and safely. Buyers searching for dc breaker, dc mcb, solar panel breaker, 500v dc breaker, or pv breaker want a proper breaker for solar wiring rather than an improvised disconnect. MCB stands for Miniature Circuit Breaker.

Use this model when you need breaker-style protection on a 500V DC solar string. It is a better fit than an AC breaker because DC arcs behave differently, and this device is designed specifically for solar PV duty.

When You Need This DC MCB Instead of Other Devices

Choose this DC MCB when your main requirement is overcurrent and short-circuit interruption on a DC string. It is resettable — different from a fuse (which must be replaced after operation) and different from a DC isolator (which is mainly for isolation, not overcurrent protection). It is also not a DC SPD (surge) or a voltage protector.

Rating Selection Guide

Actual sizing must be based on module Isc, string design, cable ampacity, ambient temperature, and inverter manufacturer recommendations. Oversizing reduces protection quality; undersizing causes nuisance tripping in hot weather.

Installation Guide

1. Mount the breaker on a DIN rail inside a suitable solar DB or DC protection enclosure.
2. Confirm the system voltage and breaker rating before making any connection.
3. Connect positive and negative string conductors exactly per the system design and labelling.
4. Tighten terminals correctly and keep cable dressing neat to reduce heat build-up.
5. Before energising, test continuity, polarity, insulation, and operation.

What This Product Does NOT Protect Against

This breaker protects against overcurrent and short circuit on DC solar strings only. It does not protect against lightning surges — use a DC SPD. It does not protect against earth leakage — that is handled by RCD/RCBO strategy in the system design. It is not a fuse replacement in every design and not an automatic transfer switch.

CNC vs Schneider and Local Brands

Related Products

• DC Fuse Holder YCF8 — Rs.450
• DC SPD 1000V
• DC Isolator
• DC 4P MCB 1500V — Rs.3,800

FAQs

What is the price?
Rs.1,600 for any of the 20A, 32A, 40A, or 63A variants on this page.

Which ratings are actually available?
This page sells four real variants: 20A, 32A, 40A, and 63A. Other ratings are not stocked on this listing.

Solar breaker or AC breaker?
Solar breaker. Use only on the DC side of the PV system, not as a substitute for AC breakers.

Which amp should I choose?
Based on string current, cable size, design margin, and inverter manufacturer recommendations. Common home systems use 20A or 32A, but final sizing must be calculated.

Does it replace a DC fuse?
Not in every design. A breaker is resettable; a fuse is one-time. Some systems use both.

Do I still need a DC SPD?
Yes if surge protection is required — this breaker does not stop lightning-related surges.

For a complete solar protection setup, browse DC circuit breakers, DC SPD, and solar bundles. Free delivery over Rs.10,000. WhatsApp 0326-1111376.