---
product_id: 413344537
title: "Heschen Universal Rotary Cam Selector Changeover Switch SZW26-20/D303.3D 660V 20A 3 Position 3 Phase 12 Terminals with Master Switch Exterior Box LW28-20/4 (Standard Box)"
brand: "heschen"
price: "NT$1292"
currency: TWD
in_stock: true
reviews_count: 5
url: https://www.desertcart.tw/products/413344537-heschen-universal-rotary-cam-selector-changeover-switch-szw26-20-d303
store_origin: TW
region: Taiwan
---

# 660V high voltage rating 3-position rotary selector 12 robust terminals for secure connections Heschen Universal Rotary Cam Selector Changeover Switch SZW26-20/D303.3D 660V 20A 3 Position 3 Phase 12 Terminals with Master Switch Exterior Box LW28-20/4 (Standard Box)

**Brand:** heschen
**Price:** NT$1292
**Availability:** ✅ In Stock

## Summary

> 🔄 Switch Smart, Stay Ahead: The Ultimate Rotary Selector for Pros

## Quick Answers

- **What is this?** Heschen Universal Rotary Cam Selector Changeover Switch SZW26-20/D303.3D 660V 20A 3 Position 3 Phase 12 Terminals with Master Switch Exterior Box LW28-20/4 (Standard Box) by heschen
- **How much does it cost?** NT$1292 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/413344537-heschen-universal-rotary-cam-selector-changeover-switch-szw26-20-d303)

## 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

- • **Built to Last:** Durable exterior box with CE and TUV certifications for safety and compliance
- • **Seamless Switching:** 3-position rotary cam selector ensures precise and smooth changeover
- • **Compact & Lightweight:** Only 272g with a sleek 11.8 x 10.4 x 7.4 cm footprint—fits anywhere
- • **Plug & Play Simplicity:** 12 terminal connections designed for quick, hassle-free installation
- • **Power Up with Confidence:** Handles up to 660V and 20A for reliable heavy-duty performance

## Overview

The Heschen Universal Rotary Cam Selector SZW26-20/D303.3D is a compact, 3-position, 3-phase changeover switch rated for 660V and 20A. Featuring 12 secure terminals and housed in a certified CE and TUV standard exterior box, it offers reliable, safe, and efficient switching for professional electrical setups.

## Description

Heschen Universal Rotary Cam Selector Changeover Switch SZW26-20/D303.3D 660V 20A 3 Position 3 Phase 12 Terminals CE with Master Switch Exterior Box LW28-20/4,TUV(Standard Box)

## Features

- Model: SZW26-20/D303.3D
- Ui : 660V ; Ith : 20A
- Positions: 3 Positions(1-0-2)
- Weight: 270g
- CE list,TUV

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | SL |
| Part number | SZW26-20/D303.3D |
| Item Weight | 272 g |
| Product Dimensions | 11.8 x 10.4 x 7.4 cm; 272 g |
| Item model number | SZW26-20/D303.3D |
| Colour | Blue |
| Style | Standard Box |
| Item Package Quantity | 1 |
| Switch Type | 3-way |
| Included components | SZW26-20/D303.3D |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Operation mode:** ON-OFF-ON
- **Current rating:** 20 Amps
- **Operating voltage:** 220 Volts
- **Contact type:** Normally Closed
- **Connector type:** Crimp
- **Brand:** Heschen
- **Terminal:** Screw
- **Item dimensions L x W x H:** 11.8 x 10.4 x 7.4 centimetres
- **Circuit type:** 3-way
- **Actuator type:** Rotary

## Images

![Heschen Universal Rotary Cam Selector Changeover Switch SZW26-20/D303.3D 660V 20A 3 Position 3 Phase 12 Terminals with Master Switch Exterior Box LW28-20/4 (Standard Box) - Image 1](https://m.media-amazon.com/images/I/61td9ESLCpL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to install
*by K***D on 19 August 2025*

Nice and big back box so good if you are using heavy cable

### ⭐⭐⭐⭐⭐ Ok
*by T***Z on 2 June 2025*

Ok

### ⭐⭐⭐⭐⭐ A decent quality switch - I'm happy with it.
*by A***R on 30 July 2023*

Others have criticised the compact nature of the box, I seem to remember one reviewer saying they were forced to mount the switch in a different box.There is no doubt the switch is a snug fit and requires careful dressing of the wires so they fold back neatly into the box as the switch is offered up to it but I think many professionals will have encountered similar or worse.I will admit my cables were both small and flexible - I only needed a 10A rating, if I were trying to connect 2.5mm2 or larger cables to fully utilise the 20A switch rating it would have been a far greater challenge, especially if the cores were solid rather than stranded, howeve I wouldn't expect solid cores to be used in the trypical applications you would use this switch for.There is a trade off between an oversized box that takes up more space and looks less attractive and one so small that is almost impossible to assemble, personally I am reasonably happy with the level of compromise here but any smaller would be a definite no! But don't cut the wires too short - leave enough length so they can bend and fold back neatly as you offer the switch to the box.

## Frequently Bought Together

- Heschen Universal Rotary Cam Selector Changeover Switch SZW26-20/D303.3D 660V 20A 3 Position 3 Phase 12 Terminals CE with Master Switch Exterior Box LW28-20/4 (Standard Box)
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**Shop now:** [https://www.desertcart.tw/products/413344537-heschen-universal-rotary-cam-selector-changeover-switch-szw26-20-d303](https://www.desertcart.tw/products/413344537-heschen-universal-rotary-cam-selector-changeover-switch-szw26-20-d303)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-10-23*