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Item #:
171989296
Power Fixed Temperature Switch RJ402
84% of respondents would recommend this to a friend
Item #:
171989296
BSD 95
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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 |
| Date First Available | 8 Dec 2015 |
| What's in the box? | Temperature differential switch, 2 x external sensors, instruction manual (English language not guaranteed) |
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
Power Fixed Temperature Switch RJ402
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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
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Pros
- Reliable temperature regulation
- Easy to install
- Durable and long-lasting
- Compact design
Cons
- May require occasional calibration.
Platform Trust & Buyer Confidence
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Jazz
Verified buyer
“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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“I always receive support when I engage customer service. Overall my experience with UBUY has been top notch. Keep up the good work.”
31 August 2026 · via Trustpilot
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29 August 2026 · via Trustpilot
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Hengo
Verified buyer
“Fast, convenient and cheap. Great store!”
27 August 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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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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