Driver LC 37W 750mA fixC SR SNC
Product Description
- Independent fixed output LED Driver
- Constant current LED Driver
- Output current 750 mA
- Max. output power 37 W
- Nominal lifetime up to 50,000 h
- For luminaires of protection class I and protection class II
- Temperature protection as per EN 61347-2-13 C5e
- 5 years guarantee
Housing Properties
- Casing: polycarbonat, white
- Type of protection IP20
Functions
- Overtemperature protection
- Overload protection
- Short-circuit protection
- No-load protection
Typical Applications
- For spot light and downlight in retail and hospitality application
- For panel light and area light in office and education application
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
Glow-wire test
Passed according to EN 60598-1 with increased temperature of 850 °C.
Technical Data
General Technical Data
| Rated supply voltage | 220 - 240 V |
| AC voltage range | 198 - 264 V |
| Mains frequency | 50/60 Hz |
| Input current (at 230 V, 50 Hz, full load) | 0.195 A |
| Leakage current (at 230 V, 50 Hz, full load) | < 450 μA |
| Typ. power consumption (at 230 V, 50 Hz, full load) | 41.5 W |
| Max. input power | 42 W |
| Output power range | 22.5 - 37.5 W |
| THD (at 230 V, 50 Hz, full load) | 20% |
| Output current tolerance | ± 7.5% |
| Typ. current ripple (at 230 V, 50 Hz, full load) | ± 30% |
| Starting time (at 230 V, 50 Hz, full load) | ≤ 0.5 s |
| Turn off time (at 230 V, 50 Hz, full load) | ≤ 0.5 s |
| Hold on time at power failure (output) | 0 s |
| Ambient temperature ta | -20 ... +50 °C |
| Ambient temperature ta (at lifetime 50,000 h) | 40 °C |
| Max. casing temperature tc | 70 °C |
| Storage temperature ts | -40 ... +80 °C |
| Dimensions L x W x H | 159.4 x 82 x 34 mm |
Ordering Data
| Type | Article number | Packaging, carton | Packaging, low volume | Packaging, high volume | Weight per pc. |
| LC 37W 750mA fixC SR SNC | 89800676 | 30 pc(s). | 390 pc(s). | 1,950 pc(s). | 0.150 kg |
Specific Technical Data
| Type | Output current³ at full load¹ | Efficiency at full load¹ | Efficiency at min. load¹ | Min. forward voltage (U-OUT) | Max. forward voltage | Max. output voltage | Max. output peak current at full load² | Max. output peak current at min. load² |
| LC 37W 750mA fixC SR SNC | 750 mA | 0.95 (89%) | 0.92 (87%) | 30 V | 50 V | 60 V | 1,050 mA | 1,210 mA |
¹ Test result at 230 V, 50 Hz.
² The trend between min. and full load is linear.
³ Output current is mean value.
Diagrams and Dimensions Description
Physical Dimensions
The driver has dimensions of 159.4 mm (Length) x 82 mm (Width) x 34 mm (Height). It features mounting holes with diameters of 4.5 mm and 4.2 mm, spaced at specific intervals for installation. The maximum casing temperature (tc) is indicated at 70°C.
Circuit Diagram
The circuit diagram shows the connection of the 220-240 V, 50/60 Hz mains supply (L and N) to the primary (PRI) terminals of the LC ... SR SNC driver. The LED module's positive (+) and negative (-) terminals connect to the secondary (SEC) terminals of the driver. The diagram also illustrates a "Device with loop through wiring function," allowing mains connections to pass through the device.
Wiring Type and Cross Section
For mains supply wires, stranded wires with ferrules or solid wires can be used. The strip length for the input terminal cage clamp should be 4-5 mm, with a maximum torque of 0.2 Nm for the M3 clamping screw. Each terminal connector should only use one wire, and each strain relief channel for one cable. The maximum wire cross-section is 1.5 mm², with a minimum strip length of 2.2 mm for the output terminal. The secondary wires (LED module) require a cross-section of 0.5 - 1.5 mm² and a strip length of 8.5 - 9.5 mm for the push-wire terminals.
Secondary Wires (LED Module) Preparation
The output wiring for the LED module can use a cross-section of 0.5 - 1.5 mm². It is recommended to strip 8.5 - 9.5 mm of insulation from the cables to ensure proper operation of the push-wire terminals.
Loose Wiring
To remove a cable, press down the "push button" and pull the cable out from the front.
Fixing Conditions
Installation should be in dry, acid-free, oil-free, and fat-free environments. The maximum ambient temperature (ta) stated on the device must not be exceeded. Minimum distances shown in diagrams are recommendations and depend on the specific luminaire. The driver is not suitable for fixing in a corner.
Wiring Guidelines
- Keep all connections as short as possible for good EMI behaviour.
- Mains leads should be kept apart from the LED Driver and other leads (ideally 5-10 cm distance).
- The maximum length of output wires is 2 m.
- Secondary wires (LED module) should be routed in parallel for good EMC performance.
- Secondary switching is not permitted.
- Incorrect wiring can damage LED modules.
- Protect wiring against short circuits to earth (e.g., sharp metal parts, cable clips, louvers).
- Through wiring of mains is only for connecting additional LED Drivers, not exceeding a maximum permanent current of 11 A.
Replace LED Module
- Turn off mains power.
- Remove the LED module.
- Wait for 20 seconds.
- Connect the new LED module.
Installation Instructions
The LED module and all wiring contact points must be sufficiently insulated against 3 kV surge voltage. Air and creepage distances must be maintained.
Hot Plug-in
Hot plug-in or secondary switching of LEDs is not permitted as it may cause very high current to the LEDs.
Thermal Details and Lifetime
Expected Lifetime
| Type | ta | tc | Lifetime |
| LC 37W 750mA fixC SR SNC | 40°C | 60°C | 50,000 h |
| 50°C | 70°C | 30,000 h |
The LED Drivers are designed for the stated lifetime under reference conditions with a failure probability of less than 10%.
Electrical Values Description
4.1 Efficiency vs load
The graph shows that efficiency increases with the load percentage. It starts around 87% at 60% load and rises to approximately 90% at 100% load.
4.2 Power factor vs load
The power factor is shown to increase with the load percentage. It starts around 0.92 at 60% load and reaches approximately 0.96 at 100% load.
4.3 Input power vs load
The input power increases linearly with the load percentage. It starts at approximately 30W at 60% load and rises to about 42W at 100% load.
4.4 Input current vs load
The input current increases linearly with the load percentage. It starts at approximately 110 mA at 60% load and rises to about 195 mA at 100% load.
4.5 THD vs load
The Total Harmonic Distortion (THD) decreases slightly as the load percentage increases. It is around 14% at 60% load and drops to approximately 10% at 100% load.
Maximum Loading of Automatic Circuit Breakers
| Automatic circuit breaker type | C10 | C13 | C16 | C20 | B10 | B13 | B16 | B20 |
| Installation Ø | 1.5 mm² | 1.5 mm² | 1.5 mm² | 2.5 mm² | 1.5 mm² | 1.5 mm² | 1.5 mm² | 2.5 mm² |
| LC 37W 750mA fixC SR SNC | 43 | 57 | 70 | 87 | 43 | 57 | 70 | 87 |
Inrush current: 10 A, Time: 100 μs
Harmonic Distortion in the Mains Supply
(at 230 V / 50 Hz and full load) in %
| THD | 3. | 5. | 7. | 9. | 11. | |
| LC 37W 750mA fixC SR SNC | < 20 | < 11 | < 3 | < 3 | < 3 | < 3 |
Acc. to EN 61000-3-2 harmonics < 5 mA or < 0.6% (whatever is greater) of the input current are not considered for calculation of THD.
Functions (Detailed)
5.1 Short-circuit behaviour
In case of a short circuit on the secondary side (LED side), the LED Driver switches off. It will automatically recover after the short-circuit fault is eliminated.
5.2 No-load operation
The LED Driver operates in burst working mode, providing constant output voltage regulation. This ensures safe operation even if an LED string fails or opens.
5.3 Overload protection
If the output voltage range is exceeded, the LED Driver protects itself, potentially causing the LEDs to flicker. Normal operation is restored automatically once the overload condition is removed.
5.4 Overtemperature protection
The LED Driver is protected against temporary thermal overheating. If the temperature limit is exceeded, the output current is reduced to maintain the casing temperature (tc) at a specific level. This protection typically activates at 10 °C above the maximum tc.
Miscellaneous
6.1 Insulation and Electric Strength Testing of Luminaires
Electronic devices can be damaged by high voltage. During routine production testing of luminaires, it's important to consider this. According to IEC 60598-1 Annex Q or ENEC 303-Annex A, luminaires should undergo an insulation test with 500 V DC for 1 second between interconnected phase/neutral terminals and the earth terminal. The insulation resistance must be at least 2 MΩ. An alternative test of electrical strength with 1500 V AC (or 1.414 x 1500 V DC) is described in IEC 60598-1 Annex Q, but this test must not be conducted to avoid damaging electronic devices.
6.2 Conditions of Use and Storage
- Humidity: 5% up to a maximum of 85% (non-condensed). Maximum 56 days/year at 85% humidity.
- Storage temperature: -40 °C up to +80 °C.
Devices must be within the specified ambient temperature range (ta) before operation.
6.3 Additional Information
Further technical information is available at www.tridonic.com → Technical Data.
Guarantee conditions are available at www.tridonic.com → Services.
Lifetime declarations are informative and do not constitute a warranty claim. Opening the device voids the warranty.
