--- product_id: 332855727 title: "Universal Rotary Cam Selector Changeover Switch, SZW26-20/D202.2D, 660V 20A, ON-Off-ON, 3 Position 2 Phase 8 Terminals, with Master Switch Exterior Box,(Standard Box)" brand: "heschen" price: "€ 27.81" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.pt/products/332855727-universal-rotary-cam-selector-changeover-switch-szw26-20-d202-2d store_origin: PT region: Portugal --- # 660V high voltage capacity IP65 waterproof rated enclosure 3-position ON-OFF-ON rotary control Universal Rotary Cam Selector Changeover Switch, SZW26-20/D202.2D, 660V 20A, ON-Off-ON, 3 Position 2 Phase 8 Terminals, with Master Switch Exterior Box,(Standard Box) **Brand:** heschen **Price:** € 27.81 **Availability:** βœ… In Stock ## Summary > πŸ”„ Switch smart, stay powered β€” the pro’s choice for seamless control! ## Quick Answers - **What is this?** Universal Rotary Cam Selector Changeover Switch, SZW26-20/D202.2D, 660V 20A, ON-Off-ON, 3 Position 2 Phase 8 Terminals, with Master Switch Exterior Box,(Standard Box) by heschen - **How much does it cost?** € 27.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/332855727-universal-rotary-cam-selector-changeover-switch-szw26-20-d202-2d) ## Best For - heschen enthusiasts ## Why This Product - Trusted heschen brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built to Last:** Durable metal contacts with IP65 waterproof protection for any environment - β€’ **Certified Safety:** TUV and CE listed for trusted, professional-grade reliability - β€’ **Seamless Switching:** 3-position rotary selector for precise ON-OFF-ON operation - β€’ **Powerhouse Performance:** Handles up to 20A and 660V for robust electrical control - β€’ **Plug & Play Compatibility:** Screw terminal design fits effortlessly with panels, motors, and more ## Overview The Heschen Universal Rotary Cam Selector Changeover Switch (SZW26-20/D202.2D) is a high-voltage, 20A rated rotary switch featuring a 3-position ON-OFF-ON mechanism. Designed with a rugged metal build and IP65 waterproof enclosure, it ensures reliable performance in demanding electrical setups. Certified by TUV and CE, it offers secure screw terminal connectivity compatible with various electrical panels and motors, making it an essential upgrade for professional-grade power management. ## Features - Model: SZW26-20/D202.2D - Ui: 660V; Ith: 20A; Uimp: 2.5KV - Positions: 3 Positions(1-0-2) - AC-15, Ue: 440V, Ie: 20A; DC-13, Ue: 240A, Ie: 1A - TUV,CE List; IP65 Waterproof Enclosure ## Technical Specifications | Specification | Value | |---------------|-------| | Actuator Type | Rotary | | Asin | B097T3DXV8 | | Best Sellers Rank | 25,226 in DIY & Tools (See Top 100 in DIY & Tools) 247 in Switches & Dimmers | | Brand | Heschen | | Circuit Type | 3-way | | Colour | Blue | | Compatible Devices | Electrical panels, motors, and other electrical equipment with screw terminal connections | | Connectivity Protocol | Wi-Fi | | Connector Type | Screw | | Contact Material | Metal | | Contact Type | Normally Open | | Control Method | Touch | | Control Type | Dual Circuit | | Controller Type | Mechanical knob | | Country Of Origin | China | | Current Rating | 20 Amps | | Customer Reviews | 4.5 4.5 out of 5 stars (1,964) 4.5 out of 5 stars | | Included Components | SZW26-20/D202.2D | | International Protection Rating | IP65 | | Item Dimensions | 8.7 x 6.6 x 6.6 centimetres | | Manufacturer | SL | | Manufacturer Part Number | SZW26-20/D202.2D | | Material | Metal | | Model Number | SZW26-20/D202.2D | | Mounting Type | Panel Mount | | Number Of Items | 1 | | Number Of Positions | 3 | | Operating Voltage | 660 Volts | | Operation Mode | ON-OFF-ON | | Specification Met | CE | | Switch Type | Rotary | | Terminal | Screw | | Unit Count | 1.0 count | | Upc | 711811449314 | | Upper Temperature Rating | 40 Degrees Celsius | | Wattage | 13200 watts | ## Product Details - **Brand:** Heschen - **Connector type:** Screw - **Contact type:** Normally Open - **Current rating:** 20 Amps - **Item dimensions L x W x H:** 8.7 x 6.6 x 6.6 centimetres - **Material:** Metal - **Operating voltage:** 660 Volts - **Operation mode:** ON-OFF-ON - **Switch type:** Rotary - **Terminal:** Screw ## Images ![Universal Rotary Cam Selector Changeover Switch, SZW26-20/D202.2D, 660V 20A, ON-Off-ON, 3 Position 2 Phase 8 Terminals, with Master Switch Exterior Box,(Standard Box) - Image 1](https://m.media-amazon.com/images/I/71g8wzkq30L.jpg) ## Available Options This product comes in different **Style Name** options. ## Questions & Answers **Q: Is this ok for switching between 2 different 240v supplies up to 10 amps in a camper van** A: I’ve not fitted it yet, but I’m using the one I’ve purchased for that purpose. Incoming 240v mains supply or 240v from inverter on to the camper can system. **Q: Using as a camper hook up to invertor where will the earth go please, do we use a seperate wago or something** A: Yes, just connect all earths into a Wago connector or similar. Space is tight inside this enclosure. Also, be sure to buzz out connections and switching prior to wiring, the identification of the terminals is not overly clear. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Does the job well *by on Reviewed in the United Kingdom 4 November 2023* My only grip, as others have observed too, is that the mounting box is a little too small IMO. Cables can only just be fitted in place within the mounting case.The kit includes all that you need but it's strange that only 2 cable outlets are provided when you really need 3 surely? (Power in, power out 1, and power out 2). The lack of an earthing option also means that you need to provide your own connection block for the (3) earth cables and then squeeze this in too. However, it all worked and I was just about able to then secure the rotary switch to the casing (just) - albeit I used 1.5mm heat proof cable.My use was to be able to select 1 of 2 power options for my immersion heating element in the Hot Water tank: Solar control, or (overnight cheap rate) grid power. ### ⭐⭐⭐⭐⭐ Works, but difficult to figure out how to wire it. *by on Reviewed in the United Kingdom 27 July 2023* Used this to changeover 2 inverter inputs to 1 AC output. There is extremely little space available in this unit to make all the connections. A jumper wire has to be installed to make it work as a changeover switch. The size of larger wires makes it very awkward to make all connections inside the supplied housing. I had to mount this unit onto another box and extend the connections to there. Also, the connections to the switch itself require small fork crimps: this limits the wire size and this may impact the highest safe working current. Other than these issues it seems to work fine. ### ⭐⭐⭐⭐ Excellent - with a couple of reservations. *by on Reviewed in the United Kingdom 12 August 2023* This is a very well-made switch with accessible and secure connection terminals. I use it for switching between two standby mains generators before the current one runs out of fuel. If switched quickly the domestic load sees only a very brief interruption, not normally long enough to reset clocks, timers, etc.The central off position ensures that there is no possible short between inputs.This arrangement gives me effectively continuous standby power, necessary in our location from time to time, at the small cost of popping out to the generator shed every 4 hours or so, to switch over, and, after a cooling down period, re-fuel and check the oil level of the standby generator.I have two reservations about the switch:Firstly, the space inside the switch box is very tight. It is difficult to squeeze 3x13 amp cables and links into the available space.Secondly, the switch is provided with only two knock-out holes and weather-proof glands, each capable of accommodating one 13-amp cable, but not two. A change-over switch normally requires one input and two output cables. I used Gaffer Epoxy Putty to create a solid weather-proof seal for two input cables.On the hole, however, this switch is highly recommended - but make sure you figure out the wiring diagram carefully. ## Frequently Bought Together - Heschen Universal Rotary Cam Selector Changeover Switch, SZW26-20/D202.2D, 660V 20A, ON-Off-ON, 3 Position 2 Phase 8 Terminals, with Master Switch Exterior Box,TUV(Standard Box) - Leviton 5278-CWP Straight Blade Flanged Male Power Inlet Receptacle, 15 A, 125 V, Nylon Face, Body And Strap , gray --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/332855727-universal-rotary-cam-selector-changeover-switch-szw26-20-d202-2d](https://www.desertcart.pt/products/332855727-universal-rotary-cam-selector-changeover-switch-szw26-20-d202-2d) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-03*