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Waterproof Overload Protector Factory High Precision Circuit Breakers China Suppliers

Leading China factory and suppliers of waterproof overload protectors. Features rated current 3A-50A, UL/TUV/CSA standards, and bimetal construction. High breaking capacity with manual or automatic reset for industrial and automotive safety. Durable, precision-engineered protection from a trusted China manufacturer.



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The Overload Protector with Waterproof Cap is a precision-engineered safety component designed to safeguard electrical motors and circuitry from damaging overcurrent conditions. Integrating advanced thermal tripping mechanisms with a robust waterproof seal, this protector ensures operational continuity even in demanding industrial environments where moisture and debris are prevalent.

Engineered for reliability, this device offers a sophisticated range of tripping characteristics to handle everything from sudden short circuits to gradual overloads. With a variety of terminal configurations including short, straight, and bended options, it provides seamless integration into diverse automotive and industrial electrical systems, ensuring high-performance protection and longevity.

Detailed Parameters

Test Temperature25℃ ± 3℃ 1000% Rated Current0.12 - 0.7s Trip
600% Rated Current0.3 - 1.7s Trip 200% Rated Current5 - 35s Trip
135% Rated CurrentTrip within 1 Hour 100% Rated CurrentHold, No Trip
Model S11 OptionsShort, Straight, Bended Terminals Model S22 OptionsStraight, Bended Terminals
Special AccessoriesLug Bushing Protective FeatureWaterproof Cap

Key Advantages

Superior Protection

Precision tripping characteristics prevent equipment burnout by reacting instantly to critical overcurrent spikes.

Rapid Response

Ultrafast trip times (as low as 0.12s) ensure maximum safety for sensitive electronic components.

Waterproof Seal

The integrated waterproof cap protects internal mechanisms from humidity, splashes, and corrosive agents.

Versatile Fitting

Multiple terminal shapes (S11/S22) allow for flexible installation in tight automotive or industrial spaces.

High Stability

Designed to hold steady at 100% rated current, eliminating nuisance tripping and reducing downtime.

Industrial Grade

Compliant with rigorous rubber and plastics manufacturing standards for long-term durability.

Product Gallery

Management Platforms

Inventory Control

Real-time tracking of S11 and S22 terminal stock to ensure rapid fulfillment.

Quality Calibration

Strict adherence to the 25℃±3℃ testing environment for precise trip calibration.

Alert Systems

Automated monitoring for overcurrent thresholds across integrated systems.

Safety Compliance

Regular auditing of Flame Retardant and Arc-resistant rubber material standards.

Logistics Hub

Global shipping optimization for industrial tape and protector components.

Technical Support

Professional guidance on selecting the right lug bushing and terminal type.

Investment Return Comparison

Comparison MetricStandard ProtectorWaterproof Overload Protector
Lifespan in Moist AreasLow (Prone to Corrosion)High (Sealed Protection)
Trip AccuracyGeneral TolerancePrecision ±3℃ Calibration
Maintenance CostFrequent ReplacementsMinimal Long-term Maintenance
System DowntimeHigh (Nuisance Tripping)Low (Stable at 100% Load)
Installation FlexibilityLimited TerminalsMulti-Terminal (S11/S22)

Frequently Asked Questions

Q: What is the primary benefit of the waterproof cap on this overload protector?

The waterproof cap prevents moisture, dust, and contaminants from entering the tripping mechanism, significantly reducing the risk of corrosion and ensuring the protector functions reliably in humid or outdoor industrial environments.

Q: How does the tripping characteristic work for 200% of the rated current?

At 200% of the rated current, the device is designed to trip within a window of 5 to 35 seconds, providing a balance between allowing temporary surges and protecting the motor from overheating.

Q: What is the difference between S11 and S22 terminal types?

S11 terminals offer short, straight, and bended options for high versatility. S22 terminals provide straight and bended options. This allows customers to choose the best fit for their specific wiring layout.

Q: Does this product work with automotive wire harness PVC tapes?

Yes, as a specialist in rubber and plastic products, our overload protectors are designed to complement our range of automotive PVC and flame-retardant tapes for complete wiring system safety.

Q: At what current level will the protector NOT trip?

The protector is designed to "Hold" and will not trip when the current is at 100% of its rated capacity, ensuring that normal operations are not interrupted.

Q: Can this protector be used in high-voltage EPR rubber tape applications?

While the protector manages the current, combining it with our J30 or J50 High-voltage EPR Rubber Tapes ensures superior insulation and safety for the entire electrical assembly.

Secure Your Equipment with Precision Overload Protection

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