Name: MEAN WELL SLD-50 series: constant-power linear LED driver - SLD-50-56
Brand: MEAN WELL
SKU: SLD-50-56
Price: 44.36 USD
Availability: InStock

MEAN WELL SLD-50 series: constant-power linear LED driver - SLD-50-56

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Description

MEAN WELL SLD-50-56

MEAN WELL SLD-50-56 is a slim constant-power linear LED driver, rated 50.4 W. Its 30–56 V LED operating region and 900–1400 mA full-power current window must be used together with the catalog I–V limits. Designed for signage, decorative and linear lighting; match the load and installation to the exact model.

Download MEAN WELL SLD-50 Datasheet (PDF)Download MEAN WELL LED Installation Manual

SLD/LDC catalog, PDF pages 1–6. Select by complete model code and the matching specification column.

Output and selection

Parameter	Specification
Identity and model code	SLD-50-56: SLD family, 50 W class, 56 V model code. Constant-power mode with adjustable current. The family wattage label is not a substitute for the exact rating.
Rated output power	50.4 W; input-voltage and thermal derating apply.
Rated output current	1050 mA.
Output voltage region	30–56 V in constant-current operation.
Adjustment and full-power ranges	Current adjustment 450–1400 mA using the built-in Io adjustment. Full-power current range 900–1400 mA. Voltage, current and power maxima are not independently combinable.
Open-circuit voltage	60 V maximum.
Current ripple and tolerance	5.0% ripple at rated current; current tolerance ±5%.
Recommended performance region	The catalog outlines these boundary points: 450 mA / 56 V; 900 mA / 56 V; 1400 mA / 36 V; 1400 mA / 30 V; 900 mA / 30 V. Select within the shaded I–V region and respect the power limit; boundary values are published graph values.
Startup	500 ms at 230 VAC; 1200 ms at 115 VAC. First cold start; repeated ON/OFF can increase setup time.
Typical efficiency	90% at the catalog test condition. Unless stated otherwise, specifications use 230 VAC input, rated current and 25°C ambient. The performance plots identify a 24 V model at Tcase 75°C; the 50 W PF graph is labeled by Tcase without a separate model designation.

Input supply

Parameter	Specification
Input supply	110–305 VAC; 155–431 VDC; 47–63 Hz AC. Built-in active PFC.
Power factor	PF ≥0.97 at 115 VAC; ≥0.95 at 230 VAC; ≥0.92 at 277 VAC, at full load.
Total harmonic distortion	THD <10% at load ≥60% / 115 or 230 VAC or load ≥75% / 277 VAC.
Typical AC current	0.6 A / 115 VAC; 0.3 A / 230 VAC; 0.25 A / 277 VAC.
Typical inrush and circuit-breaker reference	50 A; width 270 μs at cold start, 230 VAC, width measured at 50% Ipeak, per NEMA 410. At 230 VAC on a 16 A circuit breaker: 8 type B / 16 type C units maximum in the catalog reference.
Leakage current	<0.25 mA at 277 VAC.
No-load power consumption	<0.5 W.

Protection and recovery

Parameter	Specification
Overpower	110–150%; hiccup mode; automatic recovery after the fault is removed.
Short circuit	Hiccup mode; automatic recovery after the fault is removed.
Overvoltage	61–80 V; output shuts down; reapply power to recover.
Overtemperature	Output shuts down; reapply power to recover.

Operating conditions

Parameter	Specification
Case temperature and cooling	Free-air convection. Operating Tcase −20 to +90°C; maximum Tcase +90°C. Case temperature and ambient temperature are different limits.
Ambient derating in horizontal mounting	At 110 VAC: 100% load from −20 to +40°C ambient; at 230 VAC: 100% through +50°C. Derate along the respective curves to 60% load at +65°C.
Input-voltage derating at 60 Hz	Rated operation is 110–305 VAC. The static plot shows full load at 110–305 VAC, decreasing below that boundary; the plotted 100 VAC point does not extend the specified input range.
Altitude derating	For this fanless driver above 2000 m (6500 ft), reduce allowable ambient temperature by 3.5°C per additional 1000 m.
Humidity and storage	Operating 20–95% RH, non-condensing. Storage −40 to +80°C.
Temperature coefficient	±0.03%/°C over 0–60°C.
Vibration	10–500 Hz, 2 G, 12 minutes/cycle; 72 minutes on each X, Y and Z axis.
MTBF	4150.1 / 362.8 thousand hours minimum: Telcordia SR-332 / MIL-HDBK-217F at 25°C, respectively.
Service life and warranty	Typical life expectancy >30,000 hours when the designated tc/TMP point is about 75°C or lower. The graph shows life decreasing as case temperature increases; it is not a guaranteed replacement interval. Manufacturer warranty 3 years, subject to applicable manufacturer terms.

Safety and installation qualifications

Parameter	Specification
Construction and classification	Plastic slim linear housing, Class II design. Class 2 power-unit feature is listed for this model.
Safety standards	UL8750; CSA C22.2 No.250.13-12; ENEC BS EN/EN61347-1 and -2-13 independent; BS EN/EN62384; EAC TP TC 004; GB/T19510.1 and GB/T19510.213; IS15885 (Part 2/Sec 13); EN60335-1, as listed in the dedicated specification.
Electrical insulation	Input–output withstand 3.75 kVAC. Input–output insulation resistance 100 MΩ at 500 VDC, 25°C and 70% RH.
EMC emissions	Conducted and radiated: BS EN/EN55015 (CISPR15); GB/T17743; EN IEC55014-1 (CISPR14-1). Harmonic current: BS EN/EN61000-3-2 and GB17625.1, Class C at load ≥60%. Voltage flicker: BS EN/EN61000-3-3.
EMC immunity	BS EN/EN61547 and EN IEC55014-2. ESD: Level 3, 8 kV air; Level 2, 4 kV contact. Radiated, EFT/burst, conducted and magnetic-field tests: Level 2. Surge: 1 kV line-to-line. Applicable test series: BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11.
Voltage dips and interruptions	70% residual voltage for 10 periods; 0% residual for 0.5 periods; 40% residual for 10 periods; 70% residual for 25 periods.
Complete-installation responsibility	This driver is a component of the final equipment; requalify EMC on the complete installation. Catalog RCM/Non-IC independent-controlgear note states it is unsuitable for residential installations and recommends commercial decoration, signage or luminaire applications. Apply that installation qualification rather than treating a general application example as approval.

Dimensions, connection and installation

Parameter	Specification
Dimensions and mounting	280 × 30 × 16.8 mm (L × W × H); drawing tolerance ±1 mm. Two Ø3.5 mm mounting holes; the drawing gives 272 × 22 mm mounting-reference dimensions. Use the complete drawing for placement.
Designated case measuring point	The top-view tc point is located by 113.6 mm and 20.1 mm reference dimensions in the drawing. Measure the designated point in the final installation.
Input terminals	TB1: pin 1 AC/L, pin 2 AC/N. DEGSON DG219-3.5 gray terminal.
Output terminals	TB2: pin 1 +V, pin 2 −V. DEGSON DG219-3.5 red/black terminal.
Wiring dimensions	Input and output conductor area 0.75–1.50 mm²; strip length 9–10 mm, per the mechanical drawing.
Adjustment and ordering scope	The 56 V model has the built-in Io adjustment shown beside the output terminal. This is not a B/DA remote-dimming suffix.
Unit weight reference	175 g, converted from the explicit single-unit PACKING mass. This is the catalog packing reference, not a measured net or shipping weight.
Carton reference	64 units / 12.4 kg / 0.67 cu.ft. The unit weight is not calculated by dividing the carton mass.
Installation safety	Disconnect the mains supply and prevent accidental reconnection before installation or maintenance. Have faults examined by a qualified technician; do not open the power-supply case yourself.
Ventilation and mounting	Keep ventilation clear and do not stack objects on the unit. Keep 10–15 cm clearance when the adjacent device is a heat source. Follow this model’s mounting, ambient-temperature and output-derating requirements.
System wiring and protection	Use approved primary and secondary wiring rated for at least the applicable unit current. Provide suitable system-level insulation and an enclosure around single-insulated wiring; verify EMC again in the completed system. Connect a fitted FG terminal to protective earth; the manual exempts only units marked Class II and ungrounded.
Environmental and load limits	Do not immerse the unit or install it near fire or above its specified ambient limit. Keep output current and power within the model’s rated operating envelope. If a fitted external flexible cable is damaged, replacement is limited to the manufacturer, its service agent or a similarly qualified person.
Installation-manual breaker reference	The installation-manual reference table gives 8 units on B16 and 16 on C16 for SLD-50/80, based on ABB S200 calculations; confirm the actual breaker and installation.