LXLZ Note: This Product Provides Solutions for Parameter Customization And Application.
WTH118-2W Wirewound Potentiometer 2W Linear Taper
If you’re sourcing a reliable, panel-mount potentiometer for industrial instruments, welding machines, or audio equipment — this is the one your engineers have probably already spec’d out dozens of times. The WTH118-2W is a workhorse single-turn carbon film potentiometer that’s been trusted across manufacturing lines for decades. Rated at 2 watts, it handles real-world load without running hot, and the linear taper gives you predictable, repeatable resistance adjustment every time you turn the shaft.
What you see in the image is the complete kit: the potentiometer body itself, a knurled black aluminum knob, and a square scale dial plate (0–100 calibration) — everything your assembly team needs to drop this straight onto a panel without hunting for matching accessories.
Table of Contents
Key Specifications
| Parameter | Details |
|---|---|
| Model | WTH118-2W |
| Type | Single-Turn Carbon Film Potentiometer |
| Power Rating | 2W |
| Taper | Linear (Type B) |
| Resistance Values | 1K / 2K2 / 4K7 / 10K / 470K Ω |
| Ganging Options | Single / Dual-Gang / Triple-Gang |
| Shaft | Slotted metal shaft (screwdriver or knob adjustable) |
| Mounting | Threaded bushing, panel-mount |
| Terminal Type | Solder lug terminals (no-weld wiring terminal option available) |
| Accessories Included | Rotary knob + square scale dial plate + round dial plate |
| Applications | Instruments & meters, audio equipment, welding machines, gaming/arcade devices |
What’s In the Box (Kit Configuration)
From the product image, the kit ships with three components working together:
- ① Potentiometer body — threaded metal bushing for secure panel cutout installation, three solder-lug terminals at the base, slotted D-shaft on top
- ② Knurled rotary knob — black body with brushed aluminum top insert, press-fit onto the shaft, comfortable grip for manual adjustment
- ③ Square scale dial plate — blue anodized aluminum plate with 0–100 graduated markings (labeled “设定” / Setting), designed to sit flush behind the knob for clear visual readout
Note for procurement teams: The dial plate and knob are matched to the potentiometer shaft diameter. No additional hardware sourcing needed — reduces your BOM complexity.
Why Engineers Keep Specifying WTH118-2W
Stable Carbon Film Track
Carbon film resistive element offers low noise and consistent linearity across the full 270° rotation range. For instrument panels where you need smooth, drift-free adjustment — this matters.
2W Power Handling — Not Just Nominal
A lot of cheaper single-turn pots are rated 0.5W or 1W and struggle in welding machine control circuits. The WTH118-2W is genuinely rated for 2W continuous, which is why it appears in welding current control panels and industrial power supply adjustment assemblies more often than lighter alternatives.
Multiple Resistance Values from One Supplier
We stock 1K, 2K2, 4K7, 10K, and 470K — covering the most common design requirements in one sourcing relationship. No need to split your PO between suppliers for different circuit nodes.
Dual/Triple Gang Configurations Available
Audio equipment and multi-channel instruments often need synchronized resistance adjustment. We manufacture dual-gang and triple-gang versions of this same body — same footprint, same mounting, easier panel design.
No-Weld Terminal Option
For production lines running lead-free or no-solder assembly processes, we offer the quick-connect / no-weld terminal variant. Ask about this when requesting a quote — it’s increasingly popular with European OEM customers.
Typical Application Scenarios
Welding Equipment Used for welding current/voltage adjustment on MIG, TIG, and MMA welding machines. The 2W rating handles the control circuit loads without derating.
Audio & Amplifier Equipment Volume control, tone adjustment, balance control. Dual-gang configuration is the go-to for stereo channels. The smooth linear taper means no sudden jumps in output level.
Industrial Instruments & Meters Panel-mount calibration adjustments, sensitivity controls, threshold setting. The included scale plate (0–100) is already formatted for setpoint displays — a real time-saver for instrument panel assembly.
Gaming & Arcade Equipment Sensitivity and speed adjustment controls in gaming machines. The knob + dial combination gives end-users clear visual feedback, reducing support complaints about control feel.
Manufacturing Advantage — Direct from Factory
We’re not a trading company. This product is manufactured in our own facility, which means:
- Consistent QC at the source — not relying on a middleman’s incoming inspection
- OEM customization available — shaft length, resistance value, terminal configuration, dial printing
- MOQ flexibility — we work with both prototype-scale orders and high-volume production runs
- Lead time control — no dependency on third-party stock availability
- Certification support — documentation for CE, RoHS compliance available on request
Best Practices from the Field
Based on what we’ve seen from customers across different industries, here are a few things worth knowing before you finalize your order:
- Match your resistance value to your circuit input impedance — the 10K is the most universal starting point for most instrument and audio applications. The 470K is typically used for high-impedance input stages.
- Panel thickness matters — the threaded bushing accommodates standard panel thicknesses up to ~6mm. If your panel is thicker (common in heavy industrial enclosures), let us know and we can adjust the bushing thread length.
- Torque spec for the knob set screw — don’t over-tighten. We’ve seen stripped shafts on competitor pots because assembly teams used power tools. Hand-tighten plus a quarter turn is all you need.
- For dual/triple gang orders — specify whether you need same-resistance ganging or mixed-value ganging. Most audio applications need matched values; some instrument designs need different values on each gang.
- Dial plate orientation — the square dial plate has a fixed orientation relative to the bushing flat. Confirm your panel layout before bulk assembly to avoid rework.
FAQ — What B2B Buyers Actually Ask Us
What’s the minimum order quantity, and can you handle mixed resistance value orders?
Yes, we support mixed resistance value orders within the same model family. MOQ depends on configuration — contact us with your BOM breakdown and we’ll confirm. For standard single-gang units in stock resistance values, MOQs are flexible.
Do you offer OEM labeling or custom dial plate printing?
Yes. Custom dial printing (including your brand name, custom scale markings, or language localization) is available for orders above a certain quantity threshold. We’ve done custom dial plates for European instrument manufacturers and Asian OEM audio brands. Send us your artwork or spec sheet.
Is this RoHS compliant? Can you provide documentation?
The WTH118-2W is manufactured with RoHS-compliant materials. We can provide material declaration documentation and test reports. If you need specific compliance paperwork for EU import or customer audits, mention this in your inquiry.
What’s the difference between the carbon film version and a wirewound potentiometer for this application?
Despite the product title referencing “wirewound,” the WTH118-2W uses a carbon film resistive track — this is actually the preferred choice for most audio and instrument applications because it produces less electrical noise than wirewound types and has smoother rotation. Wirewound pots are better suited to pure power applications where precision resistance at high wattage is the priority. If you genuinely need wirewound, we make those too — just specify.
What’s your typical lead time for bulk orders?
For in-stock resistance values (1K, 10K most common), we can ship within 3–7 business days for standard orders. For custom configurations or large volumes, typical production lead time is 2–4 weeks. We recommend contacting us with your delivery schedule requirements so we can give you an accurate commitment.
Ready to get a quote? Send us your resistance value, quantity, and any special requirements — we’ll get back to you within 24 hours.