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The Eltako SBR12 is a DIN rail-mounted inrush current limiting relay designed for electrical load management. It is ideal for professionals and DIY enthusiasts looking to protect sensitive electronic loads, such as energy-saving lamps and electronic ballasts, from damaging current surges. Its primary benefit is extending the lifespan of connected devices by mitigating high initial current draws. A key consideration is its specific capacitive load limitations and the need for correct installation between the switching contact and the load.
| Series | SBR12 |
|---|---|
| Model Part Number | 22100430 |
| Brand | Eltako |
The Eltako SBR12 is designed to limit the high inrush current that occurs when certain types of electronic loads, like energy-saving lamps, are first switched on. This protects the switching contacts and extends the life of the connected devices.
It briefly (approximately 15ms) inserts a 12 Ohm resistor in series with the load during the initial power-up phase, reducing the peak current surge.
It must be installed *between* the output contact of the switching device (e.g., a relay or contactor) and the electrical load itself.
It is most effective for loads with high inrush characteristics, such as fluorescent lamps with electronic ballasts, compact fluorescent lamps (CFLs), and some LED lighting.
The maximum continuous load is 1200W.
Yes, it can be beneficial for LED lights that exhibit significant inrush current, especially those with electronic drivers. Ensure the capacitive load requirements are met.
No, the SBR12 has no standby loss when it is not actively conducting current to the load.
The limit is 240 microfarad after a rectifier (common for CFLs/LEDs) or 120 microfarad directly on the mains (for specific fluorescent lamp setups).
Verify that the control voltage is correctly applied to the relay's coil and that the input power to the SBR12 is live. Check all wiring connections for continuity and correct placement (input/output).
Ensure the SBR12 is correctly installed *between* the switching contact and the load. Check if the load's capacitive requirements exceed the specified limits (120µF / 240µF). The load might require a different or supplementary protection method.
Confirm that the continuous load does not exceed the 1200W limit. Ensure adequate ventilation around the unit. Check if the switching frequency is within the 600 operations/hour limit.
Check all electrical connections for looseness. Ensure the control voltage is stable. Verify compatibility with the specific type of lamp being controlled, especially regarding capacitive load.
Setup:
The SBR12 is designed for DIN rail mounting (TH35 rail). It installs directly in line, *between* the output of a switching device (like a contactor or relay) and the electrical load it controls. Ensure the relay is de-energized before making any connections.
Compatibility:
Care:
