OSRAM ST 151 starter — fluorescent tubes 4-22 W, series (twin) circuit 230 V

€3.90

Tax excluded

Starter OSRAM ST 151 for fluorescent tubes from 4 to 22 W in a series circuit — two lamps in series on a 230 V circuit with a magnetic ballast.

ST 1514-22 WSeries circuit230 V

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Description
Product Details

The OSRAM ST 151 is the starter for the series circuit, also called twin or tandem wiring: two 4 to 22 W tubes wired in series on one 230 V circuit, each with its own starter. It is typical of fittings with two short tubes and of many furniture and mirror lights.

The starter is the wearing part of a conventional fluorescent fitting: at each switch-on its bimetal heats up, closes, then opens to produce the voltage surge that strikes the tube. A built-in suppression capacitor limits radio interference. Always change the starter together with the tube: a tired starter makes even a brand-new tube blink and burns out its cathodes within days.

A starter is only used with a magnetic ballast (choke). A fitting with electronic control gear has no starter at all: the unit handles preheating and ignition itself. Operation at 230 V, 50 Hz.

Equivalents from other brands — with matching characteristics (same power, same range, same mounting), the job is done by PHILIPS S2 and SYLVANIA FS-2. ⚠️ Always check overall size, terminals and starting method before replacing control gear in an existing luminaire: these differ between brands.

Technical specifications

Brand	OSRAM
Type	Starter (glow switch) for fluorescent tubes
Power range	4 to 22 W
Circuit	Series / twin circuit (two lamps in series on 230 V)
Input voltage	230 V, 50 Hz
Mounting	Starter holder in the fitting — quarter turn

Key benefits

✓Designed for the series (twin) circuit — two lamps in series on 230 V

✓4 to 22 W range: short T8 and T5 tubes on magnetic ballasts

✓Built-in suppression capacitor

✓A wearing part to change with the tube — the cheapest repair there is

Ideal for

Fittings with two short tubes in seriesFurniture, mirror and display case lighting15/18/20 W tubes in twin wiringReplacing a worn starter (blinking tube)Tandem lighting rails

Frequently asked questions

ST 151 or ST 111 — which one do I need?

The ST 151 only for the series circuit (two 4 to 22 W lamps in series on 230 V). If each lamp has its own 230 V circuit — the most common case — choose the ST 111. They are not interchangeable: fitted in place of the other, the tube will not light.

A new tube blinks but will not light — what should I do?

Start with the starter: it is the most common cause and the cheapest. A worn starter can no longer strike the lamp and leaves the tube blinking — which damages the cathodes of the new tube. If it still blinks with a new starter, check the ballast and the lampholders.

Can I keep it if I move to electronic gear or an LED tube?

No. With electronic control gear the starter comes out of the circuit. With an LED tube, the starter must be removed or replaced by the starter link (fuse) supplied with the tube — fitting a real starter would short-circuit the LED tube.