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Description
50W 25 Ohm Aluminum Case Wirewound Resistor - Resistance Tolerance ±5% 25r - 5 Pack50W 25 Ohm Aluminum Housed Wirewound Resistor (5%) Key Features Maximum Heat Dissipation: Encased in a rugged, extruded aluminum housing featuring deep cooling fins, designed to rapidly pull heat away from the internal wirewound element and disperse it into a mounted chassis. High Stability Wirewound Core: The internal resistance element is tightly wound around a ceramic core, providing excellent stability, high surge current capability, and minimal
50W 25 Ohm Aluminum Housed Wirewound Resistor (±5%)
Key Features
- Maximum Heat Dissipation: Encased in a rugged, extruded aluminum housing featuring deep cooling fins, designed to rapidly pull heat away from the internal wirewound element and disperse it into a mounted chassis.
- High-Stability Wirewound Core: The internal resistance element is tightly wound around a ceramic core, providing excellent stability, high surge-current capability, and minimal resistance change over a wide temperature range.
- Precision Tolerance: Manufactured to a strict ±5% resistance tolerance (J-Class), ensuring highly accurate and reliable electrical performance for sensitive circuits and load testing.
- Harsh Environment Protection: The internal components are completely encapsulated in a high-temperature silicone molding compound, making the resistor highly resistant to moisture, vibration, and severe mechanical shock.
- Easy Chassis Mounting: Features built-in, pre-drilled metal flanges on both sides of the casing, allowing for secure screw or bolt mounting directly to a metal heatsink or vehicle frame.
Product Specifications
- Rated Power: 50 Watts.
- Resistance Value: 25 Ohms (25Ω / 25R).
- Resistance Tolerance: ±5% (Standard J).
- Casing Material: Gold-anodized Aluminum.
- Connection Type: Standard solder lugs / wire eyelets.
Universal Compatibility & Applications
This high-power wirewound resistor is a versatile component essential for high-current and power-dissipation projects, including:
- Automotive Lighting: Frequently used as a load resistor to fix LED turn signal "hyper-flashing" or dashboard error codes by simulating the electrical draw of a standard incandescent bulb.
- Audio Systems: Utilized in custom crossover networks for high-fidelity speaker systems or as dummy loads for testing audio amplifier output power.
- Industrial Controls: Used in motor speed control circuits, variable frequency drives (VFDs), and heavy-duty power supply regulation.
- Electronic Prototyping: Excellent for general-purpose current limiting, voltage dropping, or as a robust discharge resistor for large capacitor banks.
When to Use or Replace
- LED Hyper-Flash Correction: If you install new LED blinkers on a vehicle and they flash twice as fast as normal, splicing this resistor in parallel with the bulb will restore the normal flash rate.
- Burned or Open Resistors: If an existing ceramic or cement resistor has cracked, turned black, or shows infinite resistance on a multimeter (open circuit), it has failed and must be replaced.
- Power Supply Testing: When building or repairing a power supply, use this as a dummy load to safely test the output voltage under a heavy 50W electrical draw without risking actual equipment.
Installation & Wiring Tips
- Safety First (CRITICAL): Ensure all power to the circuit is completely disconnected and capacitors are safely discharged before soldering or handling power components.
- Heatsink Required for Full Power (PRO TIP): To safely dissipate a continuous 50 Watts, this resistor must be bolted tightly to an adequate metal heatsink or chassis. Running it in open air at maximum capacity will cause it to overheat and fail.
- Use Thermal Paste: For optimal performance, apply a thin layer of thermal compound (PC CPU paste works perfectly) between the flat bottom of the resistor and your metal mounting surface.
- Avoid Plastic Surfaces: During operation, the aluminum casing can easily exceed temperatures that will melt plastic, zip-ties, or wiring insulation. Mount it strictly to metal surfaces and route wires safely away from the casing.
- Secure Soldering: Because this component handles high current and generates heat, ensure your wire connections are mechanically secure through the lug holes before applying a heavy bead of solder.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 942 reviews
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Product Reviews
★★★★★ 4
Perfect size and weight with compact size
Style: Rack with 3 Pairs (3, 5, and 8 Pound)
I purchased the Amazon Basics Neoprene Dumbbell Hand Weights specifically for Pilates, and they’ve been a great addition to my routine. The size and weight are perfect for controlled movements, helping with muscle toning without feeling too bulky or awkward.
The neoprene coating gives them a comfortable, non-slip grip, which is especially important during longer sessions or when your hands get a little sweaty. They feel secure and easy to hold through a full workout.
I also like the shape—they don’t roll around on the floor, which makes transitions between exercises smoother and less frustrating. They’re compact enough to store easily but still feel durable and well-made.
Overall, these are a simple, affordable, and effective option for Pilates or light strength training. I’d definitely recommend them for anyone looking to add a little resistance to their workouts without overcomplicating things.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Well made , gym quality
Style: 10 Pound, Pair
Color is nice and bright . The weights grips are good they do not slip . Prices reflect quality
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Good purchase
Style: 3 Pound, Pair
These are just the right weight for me to start gaining muscle back in my arms, after a large weight loss. They are of good quality, they are covered in a nice rubber like coating that is soft to the touch. They are small enough that i can take them with me when I travel. My dog has got hold of them a couple times and played with them, and they held up just fine without any damage.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Solid, grippy, and they don’t roll away!
Style: 10 Pound, Pair
I bought these because I’m finally trying to build a consistent home workout routine and didn't want to drop a fortune on name-brand weights. I’ve been using this 10lb pair for about a month now for everything from overhead presses to lunges, and honestly, they’re exactly what I was looking for.
The Pros:
• That Neoprene Grip: The coating is fantastic. Even when my hands get pretty sweaty halfway through a workout, I don’t feel like I’m going to drop them. It’s a much "softer" feel than cold metal or hard plastic.
• The Hex Shape: This is a small detail that makes a huge difference. Since the ends are hexagonal, they don't roll across the floor when I set them down between sets. They also stay put if I’m using them for "renegade rows" or floor work.
• Compact Size: They aren’t bulky. I can easily shove them under my bed or in the corner of the closet when I’m done.
• No Weird Odor: I was worried they might smell like a tire factory (which happens with some rubber-coated weights), but these had almost no scent right out of the box.
The Cons:
• Handle Diameter: The handles are a little on the thicker side. I have medium-sized hands and it’s fine, but if you have very small hands, they might feel a bit chunky to wrap your fingers all the way around.
• Color Scuffs: The navy blue looks great, but if you clank them together or drop them on concrete, the coating can scuff or show dust pretty easily.
The Verdict:
If you just need a reliable set of weights for HIIT, Pilates, or general strength training, these are a no-brainer. You're basically getting gym-quality equipment for a fraction of the price. I’ll probably be back for the 15lb set in a few months!
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Simple, Comfortable, and Exactly What You Expect
Style: Rack with 3 Pairs (5, 10, and 15 Pound)
These are pretty much exactly what you want from a set of dumbbells — simple, functional, and no nonsense. The neoprene coating gives them a comfortable grip and keeps them from feeling slick in your hands, especially during longer workouts or if your hands get sweaty.
The coating also helps keep them from banging up floors or making as much noise compared to bare metal weights, which is nice if you’re working out at home.
Weight accuracy seems fine for general fitness use, and they’ve worked great for things like accessory movements, shoulder work, lighter presses, rehab-style exercises, and general muscle toning. The shape also helps keep them from rolling around everywhere when set down.
They’re not fancy, and they’re not trying to be — they’re just dependable dumbbells that do what they’re supposed to do at a fair price.
If you want straightforward hand weights for home workouts without overthinking it, these are a solid buy.
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Reviewed in the United States on May 26, 2026