Share:

Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker

  • Onesto 10A 1 Pole 3kA Toggle Grey Circuit Breaker product image on white background
1 1
Secure Checkout PaymentsProtected payment options at checkout
Fast Nationwide DeliveryDelivery across South Africa
Professional & Reliable SupportPractical help before and after purchase

Ways to Pay

Mastercard Visa Google Pay Apple Pay EFT Stitch
Payment methods and eligibility are confirmed at checkout.

Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker

Product overview

Add a defined protection or switching function with this Onesto circuit breaker (40A, 240/415V AC).

BrandOnesto Main collection Circuit Breakers & Earth Leakage
Product typeCircuit Breaker
SKUKC3E-140MPNKC3E-140
R 45.00
R 45.00

Taxes included where applicable.

Key details

Model KC3E-140
Colour Gray
(0 reviews)
Availability25 in stock

Maximum 25 more available to add.

Buy now, pay later0% interest on eligible Split plans
2 monthsR 22.50 4 monthsR 11.25 6 monthsR 7.50
Illustrations only · Subject to Stitch approval and plans offered at checkout. Late fees may apply.
Estimated standard deliveryR 120 Standard Delivery 🇿🇦 Spend R 1,455 more to unlock Free Standard Delivery
Pay your way

Visa, MasterCard and more through PayFast, or EFT / Bank Deposit

Samsung Pay Instant EFT Mobicred RCSStore Cards SnapScan EFTBank Transfer

Your quotation list

Items are saved in this browser. To request pricing, open the email draft and send it to Whitehouse.

Prepare quote email

Product information

Product Details

More Circuit Breakers & Earth Leakage
At a glance

Add a defined protection or switching function with this Onesto circuit breaker (40A, 240/415V AC).

Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker

Protect an electrical circuit against overcurrent with this Onesto circuit breaker. The breaker combines a defined protective function with the current, pole and breaking-capacity ratings specified for this product.

Features:

  • Electrical circuit control or protection

Specifications:

  • Voltage: 240/415V AC
  • Rated Current: 40A
  • Poles: 1
  • Breaking Capacity: 3kA
  • Trip Curve: C

Box contents

1 x Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker

Answers before you order

Circuit Breaker FAQs

Product, brand, delivery and payment guidance based on the information available for Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker.

Is Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker available to order now?

The selected option is currently listed with 25 units available. Stock can change before checkout.

What should I know about the Onesto brand and product quality?

This listing identifies the brand as Onesto. For this specific item, evaluate the published specifications, included documentation and any stated warranty before purchase. Brand reputation alone does not verify an individual product's performance or certification.

What is the intended use of this Circuit Breaker?

Use the product description and technical data for the intended application and limitations. For electrical equipment and accessories, check ratings, compatibility and the installation environment before use. Where product-specific instructions are unavailable, contact Whitehouse before installation.

How do I check compatibility and the correct model?

The listed model is KC3E-140. Match the model, dimensions, connection type and any required ratings against your existing system or installation. For mains electrical work, use a suitably qualified installer.

What power, voltage or other technical specifications are confirmed?

Published voltage: 240/415V AC. Only the populated fields in the Specifications panel are confirmed in this listing. If an essential rating is missing, obtain clarification before buying.

Is this item suitable for outdoor or damp locations?

No verified IP rating is shown for this product. Do not assume weather or water resistance; check the manufacturer's instructions or ask for a confirmed rating.

What is included in the box?

The listing states: 1 x Onesto 1P C-Curve KC3E-140 40A 3kA Circuit Breaker.

What warranty or manufacturer support applies?

No specific warranty term is published in this listing. Ask Whitehouse for the applicable manufacturer warranty and support terms.

What delivery fee applies to this item in South Africa?

Shipping costs and any free-delivery qualification are shown in the purchase section and confirmed at checkout for your destination. Special-handling items may require a separate quote. Read our shipping policy.

How can I check delivery time and collection options?

Delivery times depend on the destination, dispatch status and selected service. Available local pickup choices are displayed in the purchase area when enabled. Confirm any time-sensitive order before relying on an estimated delivery date.

Which payment methods can I use at checkout?

Choose from the methods offered in the live checkout. Supported cards and wallets are displayed in the payment panel where available; individual payment eligibility is determined by the provider.

Can I use Stitch Pay Later for this product?

Stitch Pay Later is advertised as enabled on this store. Eligible customers may see instalment options at checkout. The final plan, approval and any financing terms are determined by Stitch. An estimate on this page is not an approval or credit offer.

Can I request a quotation for multiple units?

Yes. Choose the required quantity and variant, then select Add to quote. Open View quote to review your list and prepare an email request. Saving an item locally does not submit your quotation request.

How do returns and exchanges work for this product?

Returns and exchanges are subject to Whitehouse's published policy, the item condition and applicable consumer law. Read the current return policy.

Explore more

Similar products

View collection →
  • WHL&E 63A 1 Pole DC Circuit Breaker — Whitehouse Lighting And Electrical

    WHL&E 1 Pole 63A DC Circuit Breaker

    Sold out

    WHL&E 1 Pole 63A DC Circuit Breaker

    Brand: Whitehouse Lighting And Electrical
    R 70.00
    R 70.00
    Availability Out of stock
    R120 Est. Shipping Fee
    Buy Now
    Sold out
  • NUR ND6DCD20 20A 2P 6kA 550V DC Circuit Breaker - Whitehouse Lighting And Electrical

    NUR 2P ND6DCD20 20A 6kA 550V DC Circuit Breaker

    NUR 2P ND6DCD20 20A 6kA 550V DC Circuit Breaker

    Brand: NUR
    R 140.00
    R 140.00
    Availability 26 available
    R120 Est. Shipping Fee
    Buy Now
  • Onesto KC3E-363 63A 3 Pole 3kA Circuit Breaker product image - Whitehouse Lighting And Electrical

    Onesto 3 Pole KC3E-363 63A 3kA Circuit Breaker

    Onesto 3 Pole KC3E-363 63A 3kA Circuit Breaker

    Brand: Onesto
    R 160.00
    R 160.00
    Availability 8 available
    R120 Est. Shipping Fee
    Buy Now
  • NUR ND3T32 32A 3P C-Curve 3kA DIN Rail Circuit Breaker - Whitehouse Lighting And Electrical

    NUR 3P C-Curve DIN Rail ND3T32 32A 3kA Circuit Breaker

    NUR 3P C-Curve DIN Rail ND3T32 32A 3kA Circuit Breaker

    Brand: NUR
    R 120.00
    R 120.00
    Availability 20 available
    R120 Est. Shipping Fee
    Buy Now

“Your Order, Our Priority” – Shipping & Returns FAQ

For Your Peace of Mind

When will my order be shipped?

Orders placed before 3 PM on weekdays; Monday to Friday are shipped the same day via Courier Guy or our preferred couriers. Delivery usually takes 1–3 business days for central areas and 2–6 business days for outlying regions within South Africa.

Do you offer free or specialised delivery?

Free Standard Delivery is available for orders over R1,500. Orders below R1500 a Flat R120 Delivery Fee. Bulky items like solar systems, panels, or products that require special handling. Delivery for these items can be arranged based on your location—please contact us via phone, email, or the contact form for a personalized quote.

How can I pay for my order?

We offer multiple secure payment methods through payment gateway of you choice being; PayFast and BobPay as well as EFT. These gateways offer credit/debit cards,  Instant EFT, Apple Pay, Samsung Pay, RCS Store Cards and various other methods. Choose whichever is most convenient for you.

What is your return or exchange policy?

We offer a 30-day full refund or exchange policy. Items must be returned in their original packaging. While the cost of return shipping is the customer’s responsibility, we can arrange courier collection if needed. Exceptions will be considered case by case, in accordance with the Consumer Protection Act. View our full refund policy.

I need a quick quote or have a question—how can I get help fast?

We’re here to assist you! You can reach us in whichever way is easiest for you:

WhatsApp: Chat with us
Call us: +27 83 605 9130
Email: orders@whitehouselightingandelectrical.co.za
Contact form: Fill it out here

We promise to respond quickly and efficiently—your questions and quotes are our priority.

WHITEHOUSE KNOWLEDGE HUB

Advice Before You Buy

Practical lighting, electrical and solar advice, buying guides and product insights to help you make confident decisions for your home, business or project.

View all guides