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Item #:
171989296
Power Fixed Temperature Switch RJ402
84% of respondents would recommend this to a friend
Item #:
171989296
GTQ 671
Price Details
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*All items will import from EU
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Order now and get it around Wednesday, September 30
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RJ402: Your reliable temperature differential switch for automatic heating systems.
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Note: Step Up Voltage Transformer required for using electronics products of Germany store (230 V). Recommended power converters Buy Now.
What Stands Out
Dual Sensor Support
Equipped with two external sensors, the ELEKTROBOCK RJ402 effectively monitors temperature differences, enhancing system efficiency for circulation pumps and solar systems.
DIN Rail Compatibility
Designed for easy installation on a DIN rail, this temperature differential switch provides convenience and accessibility, making it an ideal choice for both DIY enthusiasts and professionals.
Reliable Performance
Built to deliver consistent and precise temperature readings, the ELEKTROBOCK RJ402 improves energy efficiency and prolongs the life of your solar system and circulation pump.
Product Details
| Manufacturer | Elektrobock |
| Part number | RJ402 |
| Item Weight | 222 g |
| Product Dimensions (L x W x H) | 8.7 x 5.2 x 6 cm; 222 g |
| Item model number | RJ402 |
| Colour | Gray |
| Material | Plastic |
| Item Package Quantity | 1 |
| Switch Type | 3-way |
| Plug Profile | DIN rail mounting |
| Switch Style | Relay |
| Specification met | CE |
| Included Components | Temperature differential switch, 2 x external sensors, instruction manual (English language not guaranteed) |
| Batteries Included? | No |
| Batteries Required? | No |
| Guaranteed software updates until | unknown |
| Date First Available | 8 Dec 2015 |
| What's in the box? | Temperature differential switch, 2 x external sensors, instruction manual (English language not guaranteed) |
| Country of Origin | This item will be imported from EU |
| What is in the box | Power Fixed Temperature Switch... For more details, please check description/product details |
Who Should Buy?
-
Solar System Users
Ideal for users with solar heating systems looking for effective temperature control and monitoring.
-
Heating System Technicians
Helpful for professionals maintaining heating systems, providing accurate temperature differentiation for optimal performance.
-
Energy Efficient Homes
Recommended for homeowners aiming to optimize energy use and increase efficiency in heating systems.
-
Basic Homeowners
Not suitable for those without technical knowledge or experience in installing temperature controls.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the power supply requirement for the RJ402?
Answer: The RJ402 requires a power supply of 230 V AC. -
Question:
What is the control temperature range for the RJ402?
Answer: The control temperature range is from +20C to +80C. -
Question:
How many temperature sensors are included with the RJ402?
Answer: Two temperature sensors are included in the box contents.
Elektrobock RJ402 Editorial Review
Power Fixed Temperature Switch RJ402 is a versatile device designed for various temperature control applications, including pool heating and window openers. With its 3-way switch type and included external sensors, it automatically activates based on surrounding temperature differences. Though some users have reported issues such as a defective sensor upon delivery, others appreciate its functionality once properly installed. The product, manufactured by Elektrobock, offers a durable plastic build and a compact design, making it suitable for DIN rail mounting. However, it's essential to follow safety measures during installation to ensure effective operation.
Customer Reviews & Ratings
76 customers ratings
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5 Star
54%
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4 Star
18%
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3 Star
10%
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2 Star
4%
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1 Star
14%
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Pros
- Easy to install for different applications
- Compact size perfect for limited space
- Includes two external sensors for flexibility
- Effective temperature control mechanism
- Durable plastic construction to endure various environments
Platform Trust & Buyer Confidence
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Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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GTQ 671
Order now and get it around Wednesday, September 30
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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Features & Benefits
- Automatic control for circuits such as pumps based on temperature differences.
- Power supply of 230 V AC with minimal consumption (up to 0.5 W).
- Control temperature range from +20C to +80C with a hysteresis of +2C to +35C.
- Output features potential-free contacts with a relay capable of handling 5A at 250V AC.
- Two temperature sensors included for efficient operation.
- Designed for easy mounting on DIN rails, operates effectively in a range of 0C to +50C.
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