Tridonic 87500274 LCBI 10W 350mA PHASE-CUT/1-10V SR- Economical Dimmable LED Driver

87500274 Common Data

Ordering data LCBI 10W 350mA PHASE-CUT/1-10V SR 87500274

87500274 Technical data

Rated supply voltage 220 – 240 V
AC voltage range 198 – 264 V
Typ. rated current (at 230 V, 50 Hz, full load) 58 mA
λ at full load 1 0.95
λ over full operating range (min.) 1 0.9C
Mains frequency 50 Hz
Overvoltage protection 300 V AC, 1 h
Max. input power 13 W
Output power 5 – 10 W
THD (at 230 V, 50 Hz, full load) < 20 %
THD (at 230 V, 50 Hz, min. load) < 20 %

Control input 2 1…10 V, potentiometer 200 kΩ
Output current tolerance (at 230 V, 50 Hz, full load) 3 ± 7.5 %
Output current tolerance (at 230 V, 50 Hz, min. load) 3 ± 10 %
Starting time (at 230 V, 50 Hz, full load) 1 ≤ 0.5 s
Turn off time (at 230 V, 50 Hz, full load) ≤ 0.2 s
Hold on time at power failure (output) 0 s
Ambient temperature ta -20 … +40 °C
Ambient temperature ta (at lifetime 50,000 h) 40 °C
Max. casing temperature tc 60 °C
Storage temperature ts -40 … +80 °C
Lifetime up to 50,000 h
Dimensions L x W x H 101.5 x 51 x 29.5 mm

87500274 Standards

EN 55015
EN 60598-1
EN 61000-3-2
EN 61000-3-3
EN 61347-1
EN 61347-2-13
EN 61547
EN 62384

Overload protection

If the maximum load is exceeded by a defined internal limit, the LED driver reduces the LED output current. After elimination of the overload the nominal operation is restored automatically.

Short-circuit behaviour

In case of a short circuit on the secondary side (LED) the LED driver switches off. After elimination of the short circuit the nominal operation is restored automatically.

No-load operation

The 87500274 works in burst working mode to provide a constant output voltage regulation which allows the application to be able to work safely when LED string open due a failure.
In no-load operation the output voltage will not exceed the specified max. output voltage (see page 2).

87500274 Expected lifetime

The 87500274 are designed for a lifetime stated above under reference conditions and with a failure probability of less than 10 %.

The relation of tc to ta temperature depends also on the luminaire design.

If the measured tc temperature is approx. 5 K below tc max., ta temperature should be checked and eventually critical components (e.g. ELCAP) measured. Detailed information on request.

Installation instructions

The LED module and all contact points within the wiring must be sufficiently insulated against 2.8 kV surge voltage.
Air and creepage distance must be maintained.

Replace LED module

1. Mains off
2. Remove LED module
3. Wait for 20 seconds
4. Connect LED module again

Hot plug-in or secondary switching of LEDs is not permitted and may cause a very high current to the LEDs.

87500274 Dimming

Dimming range 10 % to 100 %
Control with:
• Potentiometer
• 1 … 10 V
• Both phase cut and 1 … 10 V dimmer connect together in one device is not permitted and may cause flicker.
• In 1 … 10 V dimming applications, the system SELV depends on the dimmer. If a SELV 1 … 10 V dimmer is used, the system will be SELV.
• Wrong polarity input to the 1 – 10 V interface will damage the LED driver. 1 … 10 V function

The light intensity of the LEDs vary proportionally to the signal sent to the terminal.

Potentiometer function

By rotating the potentiometer there is variation of the LED light intensity in a proportionate or logarithmic way depending on the model of potentiometer used. The use of a logarithmic potentiometer is recommended.

Humidity: 5 % up to max. 85 %, not condensed (max. 56 days/year at 85 %)
Storage temperature: -40 °C up to max. +80 °C

The devices have to be within the specified temperature range (ta) before they can be operated.

Glow wire test

according to EN 60598-1 with increased temperature of 850 °C passed.

87500274 Wiring type and cross section

For wiring use stranded wire with ferrules or solid wire.
For perfect function of the cage clamp terminals the strip length should be
4 – 5 mm for the input terminal.
The max. torque at the clamping screw (M3) is 0.2 Nm.

Input terminal (D2)

Output terminal (D1)

To get a proper working strain relief it is recommended that the cable jacket diameter of the side D2 is 2 mm bigger than the diameter of the side D1.

(This can vary if the used cable jacket material varies from side D2 to D1 in pinching property).

87500274 Wiring guidelines

• All connections must be kept as short as possible to ensure good EMI behaviour.
• Mains leads should be kept apart from LED driver and other leads (ideally 5 – 10 cm distance)
• Max. length of output wires is 2 m.
• To comply with the EMC regulations run the secondary wires (LED module) in parallel.
• Secondary switching is not permitted.
• Through wiring is not possible.
• Incorrect wiring can demage LED modules.
• To avoid damage of the Driver, the wiring must be protected against short circuits to earth (sharp edged metal parts, metal cable clips, louver, etc.).

87500274 Fixing conditions

Dry, acidfree, oilfree, fatfree. It is not allowed to exceed the maximum ambient temperature (ta) stated on the device. Minimum distances stated below are recommendations and depend on the actual luminaire. Is not suitable for fixing in corner.

Device not suitable for covering with thermally insulating material according to IEC 60598-1 Ed.9

Insulation and electric strength testing of luminaires

Electronic devices can be damaged by high voltage. This has to be considered during the routine testing of the luminaires in production.

According to IEC 60598-1 Annex Q (informative only!) or ENEC 303-Annex A, each luminaire should be submitted to an insulation test with 500V DC for 1 second. This test voltage should be connected between the interconnected phase and neutral terminals and the earth terminal.

The insulation resistance must be at least 2MΩ. As an alternative, IEC 60598-1 Annex Q describes a test of the electrical strength with 1500V AC (or 1.414 x 1500V DC). To avoid damage to the electronic devices this test must not be conducted.

Maximum number of switching cycles

All LED driver are tested with 50,000 switching cycles.

A constant current LED driver regulates electrical flow to maintain a steady current (e.g.350mA, 700mA) required for COB modules or downlights. Models supporting both leading and trailing edge dimming are highly versatile, allowing smooth, flicker-free light control using compatible phase-cut wall dimmers.

Constant Current (CC) Basics

How it works: Instead of supplying a fixed voltage, the driver safely raises or lowers voltage as needed to keep the current steady. This prevents thermal runaway (where LEDs draw too much power and burn out).

Wiring: CC lights and fittings must be wired in series (daisy-chain) so the current remains identical across all lamps.

Leading Edge vs. Trailing Edge Dimming

These describe how the dimmer switch cuts the AC power wave to reduce light output:

Leading Edge (TRIAC): Cuts the start of the AC sine wave as it rises. Because it turns on abruptly, it can cause loud buzzing or flickering in LEDs unless the driver is specifically designed to handle it. These are older, traditional dimmers often used for incandescent/halogen bulbs.

Trailing Edge: Cuts the end of the AC wave as it falls, allowing the voltage to start smoothly. This method is much better suited to the electronic components inside LED drivers, resulting in quieter operation and far less flickering.

Tridonic are a Zumtobel Group company, founded in 1956 in Dornbirn, Austria. For more than 60 years, they have been a driving force in the development of professional lighting solutions.

Today, Tridonic is a world-leading provider of lighting technology for professional applications, including office buildings, and retail outlets, hotels and restaurants, the education industry and outdoor lighting sectors.

In Tridonics’ extensive range of energy-efficient dimmable and non-dimmable LED drivers they offer the right products for every indoor and outdoor application – from cost-efficient LED drivers in proven Tridonic quality to premium products that give you maximum flexibility and convenience.

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