---
product_id: 249115703
title: "KW3A 16A 125V/250V Microwave Oven Door Interlock Switch Normally Close (1Pcs)"
brand: "tuaic"
price: "$14.85"
currency: USD
in_stock: true
reviews_count: 8
category: "Tuaic"
url: https://www.desertcart.us/products/249115703-kw3a-16a-125v-250v-microwave-oven-door-interlock-switch-normally
store_origin: US
region: United States of America
---

# 16A high current rating Normally Closed safety switch -40° to 105°C wide temp range KW3A 16A 125V/250V Microwave Oven Door Interlock Switch Normally Close (1Pcs)

**Brand:** tuaic
**Price:** $14.85
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your microwave’s safety and performance with the KW3A door interlock switch—because your kitchen deserves flawless power control!

## Quick Answers

- **What is this?** KW3A 16A 125V/250V Microwave Oven Door Interlock Switch Normally Close (1Pcs) by tuaic
- **How much does it cost?** $14.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/249115703-kw3a-16a-125v-250v-microwave-oven-door-interlock-switch-normally)

## Best For

- tuaic enthusiasts

## Why This Product

- Trusted tuaic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Fits not only microwaves but also popular Ninja Foodi Air Fryers—versatile fix for multiple devices.
- • **Powerful 16A Current Capacity:** Handles high electrical loads for reliable microwave operation.
- • **Precision Normally Closed Design:** Ensures microwave power cuts instantly when door is opened for ultimate safety.
- • **Wide Operating Temperature Range:** Performs flawlessly from freezing -40°C to scorching 105°C environments.
- • **Durable Engineering Plastics & Silver Contacts:** Built to last with premium materials that resist wear and maintain conductivity.

## Overview

The KW3A 16A 125V/250V Microwave Oven Door Interlock Switch is a robust, normally closed push-button switch designed to cut power instantly when the microwave door opens. Made from durable engineering plastics with silver contacts, it operates reliably across a wide temperature range (-40° to 105°C). Compatible with various microwave models and even Ninja Foodi Air Fryers, this switch offers an affordable, easy-to-install solution to restore appliance safety and functionality.

## Description

KW3A Microwave oven door interlock switch, Normally Closed/NC ( Press the switch to turn off the power ). Package contains 1 Normally Closec(1 NC). Current:16A; Voltage:125 / 250AVC.Working temperature:-40°~105°. Material: Engineering plastics;Color: Grey; Contact:Silver contact. Normally Closed switch：After pressing the switch button, the internal contacts are separated and the switch is disconnected. Please pay attention to distinguish between normally open and normally closed switches during installation. The one with the foot in the NO position is a normally open switch, and the one with the foot in the NC position is a normally closed switch.

Review: Will Fix Ninja Air Fryer - Not only for microwave ovens, it also fixes the Ninja Foodi 5 in 1 Air Fryer. For anyone with this Ninja Air Fryer this switch fixed mine. So far it works as good as expected. Well worth the money.
Review: Saved me $400 - This door switch replaced one of three that had gone bad. Microwave now works like new again. It saved me the cost of a new microwave and the pain of installing it. If you have basic electrical knowledge, you should be able to install this switch with ease. There are plenty of instructional YouTube videos to help you.

## Features

- KW3A Microwave oven door interlock switch, Normally Closed/NC ( Press the switch to turn off the power ).
- Package contains 1 Normally Closec(1 NC).
- Current:16A; Voltage:125 / 250AVC.Working temperature:-40°~105°.
- Material: Engineering plastics;Color: Grey; Contact:Silver contact.
- Normally Closed switch：After pressing the switch button, the internal contacts are separated and the switch is disconnected.
- Please pay attention to distinguish between normally open and normally closed switches during installation. The one with the foot in the NO position is a normally open switch, and the one with the foot in the NC position is a normally closed switch.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B085M8MHQS |
| Actuator Type | Push Button |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #810,115 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #1,409 in Microwave Oven Replacement Parts |
| Brand | TUAIC |
| Brand Name | TUAIC |
| Circuit Type | 1-way |
| Color | Gray |
| Compatible Devices | Microwave Ovens |
| Connectivity Protocol | X-10 |
| Connector Type | Molex |
| Contact Material | Stainless Steel |
| Contact Type | Normally Closed |
| Control Method | Touch |
| Control Type | Manual |
| Current Rating | 16 Amps |
| Customer Reviews | 4.2 4.2 out of 5 stars (202) |
| Date First Available | March 2, 2020 |
| Item Weight | 0.317 ounces |
| Item model number | KW3A |
| Manufacturer | ZOU |
| Material Type | Stainless Steel |
| Model Info | KW3A |
| Mounting Type | Door Mount |
| Number of Items | 1 |
| Number of Positions | 1 |
| Operating Voltage | 250 Volts |
| Operation Mode | manual |
| Package Dimensions | 1.5 x 1.1 x 0.43 inches |
| Part Number | KW3A |
| Terminal | Blade |
| Unit Count | 1 Count |
| Vehicle Service Type | Microwave Oven |

## Product Details

- **Brand:** TUAIC
- **Circuit Type:** 1-way
- **Connector Type:** Molex
- **Contact Type:** Normally Closed
- **Current Rating:** 16 Amps
- **Material:** Stainless Steel
- **Operating Voltage:** 250 Volts
- **Operation Mode:** manual
- **Switch Type:** Normally Closed
- **Terminal:** Blade

## Images

![KW3A 16A 125V/250V Microwave Oven Door Interlock Switch Normally Close (1Pcs) - Image 1](https://m.media-amazon.com/images/I/61fmBJz5coS.jpg)

## Questions & Answers

**Q: Does this switch replace the middle door switch on a bosch hmv 3053u/01 microwave?**
A: Usually there are 3 switches on a microwave door.  The top and bottom switches are normally open and the middle switch is normally closed.  If the prong comes out on the nc line on the side of the switch it is normally closed, if the prong comes out on the line that is labeled no then it is normally open. If you are testing then the nc switch makes a circuit without pushing the button and one pushed the circuit is interrupted with no being just the opposite

## Customer Reviews

### ⭐⭐⭐⭐⭐ Will Fix Ninja Air Fryer
*by M***N on September 7, 2025*

Not only for microwave ovens, it also fixes the Ninja Foodi 5 in 1 Air Fryer. For anyone with this Ninja Air Fryer this switch fixed mine. So far it works as good as expected. Well worth the money.

### ⭐⭐⭐⭐⭐ Saved me $400
*by R***1 on May 1, 2024*

This door switch replaced one of three that had gone bad. Microwave now works like new again. It saved me the cost of a new microwave and the pain of installing it. If you have basic electrical knowledge, you should be able to install this switch with ease. There are plenty of instructional YouTube videos to help you.

### ⭐⭐⭐⭐⭐ Not all switches will work
*by M***N on August 13, 2022*

This is one of three safety switches for the door on a Samsung microwave. The only difference is this switch has a wider gap between the connectors. So before you buy new switches take time to watch a YouTube video using your model number to see how to remove them. Then make notes on the style and OEM number printed on your original switch before you look them up on Amazon. This is an easy install just take your time and everything will be fine. M

## Frequently Bought Together

- KW3A 16A 125V/250V Microwave Oven Door Interlock Switch Normally Close (1Pcs)
- KW3A 16A 250V Microwave Oven Door Micro Switch Normally Open （1Pcs）
- Microwave Oven Door Switch Replacement Part, 16A 125VAC, KW3AT-16 (Downward Compatible with KW3A-16), Normally Open - 1Pc

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-19*