ONAN A040B331 ISOLATOR - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
- ONAN A040B331
- MPN:
- A040B331
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock


Available Inventory
Get what you need quickly with our wide stock and fast shipping.
Competitive Pricing
Enjoy competitive rates and great deals on every order.
Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Authentic ONAN Genuine OEM Part ensuring perfect fit and durability
- Provides critical electrical isolation to protect your generator components
- Enhances system safety by preventing electrical faults and reducing risk
- Maintains the integrity and peak performance of your Cummins Onan equipment
ONAN A040B331 ISOLATOR - Harness the Power of Precision with ONAN Engineering Excellence
The ONAN A040B331 ISOLATOR plays a vital role in maintaining the integrity of your generator’s electrical system by ensuring reliable isolation between components. Engineered for seamless compatibility and long-lasting function, this isolator safeguards your investment and guarantees consistent operation under demanding conditions. Secure your generator’s health today—order this essential OEM component and experience reliability that endures.
Benefit that Elevates Performance and Peace of Mind
- 100% Genuine OEM part crafted to meet Cummins Onan’s stringent quality standards
- Precision-engineered materials that resist wear and electrical degradation
- Designed to optimize system safety, reducing downtime risk
- Enables your generator to maintain peak operational efficiency
- Supports long-term engine and system reliability critical for mission-critical applications
Details
Category: Isolators
Product SKU: ONAN A040B331
Our team is devoted to guiding you through your purchase with knowledgeable, personalized support available via our help center. We genuinely want to see your repair succeed and your power system perform flawlessly—count on us to help you make the best choice for continued reliability and value.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov