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63A Adjustable Three-Phase Overcurrent and Undervoltage Protection Relay, DIN Rail Mount, Synchronous and Asynchronous.

Name: 63A Adjustable Three-Phase Overcurrent and Undervoltage Protection Relay, DIN Rail Mount, Synchronous and Asynchronous.
SKU: 1005006511920964
Price: 12.25 USD
Availability: InStock
Rating: 4.9 (246 reviews)

★ 4.9 / 5🔥 246 sold✓ Picked

✓ Selected for InstaShop by high rating (4.4+) and proven sales

$12.25$13.32Save 8%

Protect your equipment from power fluctuations with this adjustable three phase protection relay. It provides essential safety against voltage and current surges, making it an ideal choice for anyone seeking reliable electrical circuit security in their home or workshop.

🛒 Buy now on AliExpress → 📋 Full specs, sizes, materials & detailed description — on the AliExpress product page →

🌍 Ships worldwide via AliExpress with a tracking number. Any local import taxes (if any) are set by your country's customs, not by InstaShop.

💡 Why buy · InstaShop analysis

✅ Protects sensitive equipment from voltage fluctuations and s
✅ Integrates overcurrent and voltage protection in a single DI
✅ Adjustable thresholds allow for customization based on speci

⚠️ Requires professional installation by a licensed electrician due to hi
⚠️ Occupies significant space (typically 4+ modules) on the electrical di

👤 Best for: Homeowners or facility managers with a 3-phase supply who want to safeguard appliances and motors from grid instability.

🚫 Less suitable for: Users with a standard single-phase electrical system or those without sufficient available space in their electrical panel.

🔎 Check before buying: Verify the maximum wire gauge capacity of the terminals to ensure they are compatible with your existing 63A wiring.

💰 Is the price good? Around the usual market price — compare with the similar items below.

🚚 Worldwide shipping — usually 2–4 weeks with a tracking number. Some sellers offer faster paid shipping.

⭐ Quality & trust — rated 4.9/5 based on 246 real purchases, a genuine satisfaction signal.

🔒 Secure checkout — payment and purchase happen on AliExpress with Buyer Protection and a refund if the item never arrives / isn't as described.

💡 Before buying — on the product page check reviews with real photos, shipping time to your country, and sizes/specs if relevant.

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🔍 In-depth analysis

This three-phase adjustable protection relay is a specialized electrical component designed for DIN rail installation. It serves as a comprehensive safeguard for electrical circuits, monitoring for both over-current and under-voltage conditions to prevent damage to downstream appliances and machinery. With a 63A capacity, it is robust enough to handle high-demand residential or light commercial loads. The device is notably versatile, offering support for both synchronous and asynchronous modes, which allows for broader compatibility with different wiring configurations and phase requirements.

Judging by the high buyer rating and the steady volume of orders, this product has established a track record of reliability in real-world applications. The clear display typically associated with these units allows for real-time monitoring of electrical health. While it provides essential protection against power instability, it remains a technical tool that requires specific knowledge for proper calibration. It bridges the gap between simple circuit breakers and complex industrial monitoring systems at a more accessible price point.

✅ Pros

High 63A current capacity makes it suitable for heavy-duty three-phase applications.
Offers both over-current and under-voltage protection in a single DIN-mount unit.
Strong user feedback and high order volume indicate consistent performance and manufacturing quality.
Features adjustable settings for both synchronous and asynchronous operation modes.

⚠️ Watch out

Requires professional installation and technical knowledge to configure thresholds correctly.
The specific material quality of the outer housing and terminals is not stated and should be verified.

Who it's for: This device is ideal for property owners or facility managers with three-phase electrical systems who need to protect sensitive equipment from voltage drops or current spikes. It is particularly useful for those seeking manual control over protection thresholds.

Who should skip it: This is not suitable for users with standard single-phase residential wiring. It is also not a 'plug-and-play' consumer device and should not be installed by anyone lacking professional electrical training.

🔎 Check before you buy

Confirm the exact minimum and maximum adjustable ranges for both voltage and current with the seller.
Verify the physical width of the unit to ensure it fits the available modules on your DIN rail.
Ask the seller for a digital copy of the wiring diagram and manual to confirm compatibility with your specific 3-phase setup.
Inquire about specific safety certifications or compliance standards relevant to your local electrical codes.

💰 Value verdict: Considering the high buyer satisfaction and the solid number of successful deliveries, this relay offers excellent value at its current price. It provides a level of protection usually found in more expensive industrial gear. The current discount makes it a cost-effective insurance policy for expensive three-phase equipment.

💡 Tips

Always hire a certified electrician to install and calibrate the relay to ensure your system is actually protected.
Test the trip settings periodically to ensure the relay responds correctly to simulated fluctuations.
Ensure there is adequate ventilation around the DIN rail to prevent heat buildup during high current loads.

Questions about this product

Can this be used for a single-phase motor?

This specific model is designed for three-phase systems; using it for single-phase may not utilize its full protection capabilities. Verify with the seller if they have a single-phase version.

Is the 63A rating the maximum continuous load?

Typically, 63A represents the maximum threshold, but it is best practice to run your system at a lower continuous load. Check the manual for the recommended steady-state current.

What happens if only one phase fails?

This relay is designed to monitor phase imbalances and failures. Depending on your settings, it should trigger a protection event to prevent damage to your equipment.

❓ Questions & Answers

Does it ship to my country?

Yes. The item ships worldwide via AliExpress, usually within 2–4 weeks, with a tracking number.

Are there customs or taxes?

Import duty/VAT depends on your country's rules and the order value. Any local charges are set by your customs authority, not by InstaShop.

How do I return an item if something is wrong?

Purchases are made on AliExpress with Buyer Protection — you can open a dispute and get a refund if the item never arrives or is not as described, typically within 15 days of delivery.

Is the price final?

The price shown is the product price on AliExpress. Shipping and any local import taxes (if applicable in your country) are separate.