12V 400mA 5W AC/AC Power Supply with 5.5x2.1mm Jack

12V 400mA 5W AC/AC POWER SUPPLY — ALTERNATE OUTPUT: 5.5x2.1mm JACK

This RS PRO 12V 400mA AC/AC power supply is a reliable wall-mounted power adapter for your low-voltage equipment.

It converts 230–240V AC mains voltage into a precise and safe 12V AC output.

Designed for devices that require an AC power supply, it supports a current draw of up to 400 mA.

Caution: This model outputs alternating current (AC). It is not suitable for direct current (DC) applications.

Technical Specifications of the 12V 400mA AC/AC Power Supply

TECHNICAL DETAILS

Type: AC/AC power adapter. Part number: 139-1764. Brand: RS PRO. Input voltage: 230–240 V AC.

Frequency: 50–60 Hz. Maximum input current: 45 mA. Output voltage: 12V AC. Power: 5W.

Output current: 0.4A / 400mA. Line regulation: ±1%. Load regulation: ±5%. Noise: 100 mV.

Protection rating: IP20. Temperature: -20°C to +40°C. MTBF: 50,000 hours (+25°C).

Dimensions: 62 × 51 × 42 mm. Cable: 1.8 m. Connector: 5.5 × 2.1 mm jack. Weight: 230 g.

Included adapter: 5.5 × 2.5 mm connector. Plug: European 2-pin Type C. For non-medical use.

COMPATIBILITY

Check to make sure your device requires a maximum of 12V AC, 400mA, with a 5.5x2.1 mm or 5.5x2.5 mm jack.

This AC adapter is suitable for audio modules, water softeners, and automation systems.

It also powers small household appliances that operate exclusively on 12V AC.

Do not use on a device labeled 12V DC, even if the jack connector looks the same.

EQUIVALENT REFERENCES

Compatible models: RS PRO 139-1764, Distrelec 304-03-927, KRE1200400L, or a 12V AC 400mA adapter.

Equivalent to 230V to 12V AC 5W power adapters with a 5.5 x 2.1 mm jack output.

Check the type of current (AC or DC) and the required power before confirming your order.

COMMON APPLICATIONS

Low-power 12V AC equipment. Compatible electronic modules and water softeners.

Specific audio or radio devices that require direct AC-to-DC conversion.

Ideal for small, lightweight automated devices or systems requiring a stable 12V AC voltage.

PRODUCT HIGHLIGHTS

This power supply offers a rated power output of 5W in a compact wall-mounted design.

1.8-meter cable for easy installation. Compatible with both 2.1-mm and 2.5-mm jacks.

Complies with the IEC/EN 61558 standard. New product that has undergone a visual inspection by Accessoires Énergie.

IMPORTANT INFORMATION

This product is an AC/AC transformer. It is not a conventional AC/DC power supply.

Be sure to check whether your device requires 12V AC. Reversing the AC/DC polarity can cause damage.

An AC output does not have a fixed polarity. The electric current is purely alternating.

WARRANTY AND QUALITY

New product, tested and inspected before shipment by the Energy Accessories team.