Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well LDDS-300HWB DC/DC LED Driver CC 300mA - Step-down Wire Type - 3 in 1 Dimmable

Name: Mean Well LDDS-300HWB DC/DC LED Driver CC 300mA - Step-down Wire Type - 3 in 1 Dimmable
Brand: Mean Well
SKU: LDDS-300HWB
Price: 11.12 USD
Availability: InStock

constant currentstep downhigh efficiency up to 97%IP67wire style

SKU LDDS-300HWB

$11.12 USD

Shipping calculated at checkout.

Available to order

Overview

LDDS-300HWB is the model of this series: typical efficiency 95%.

LDDS-H series is a 45W DC/DC LED driver featuring constant current output. LDDS-H operates from 12~56VDC and offers models with different rated current ranging between 250mA and 1000mA. With the high efficiency up to 96%, The 94V-0 flame retardant plastic case with fully-potted to enhance the heat dissipation allows this series to fit for class Ⅲ commercial track light or DC bus lighting application.

Features

DC/DC step-down converter
Constant current output: 250mA to 1000mA
Wide input voltage: 12 ~ 56VDC(48V typ.)
Wide output LED forward string voltage: 2 ~ 45VDC
High efficiency up to 96%
Built-in EMI filter, comply with BS EN/EN55015
3 in 1 dimming and remote ON/OFF control.
Protections: Short circuit / Over temperature / Over current
Cooling by free air convection
Compact size and Fully encapsulated
Suitable for driving illumination LED
5 years warranty

Specifications

LDDS-300HWBSpecifications from the official datasheet (2026-08-20 edition)

OUTPUT

CURRENT RANGE: 300mA
VOLTAGE RANGE^Note.4: 2 ~ 45VDC
CURRENT ACCURACY (Typ.): ±5% at 48VDC input (or 24VDC)
RIPPLE & NOISE(max.)^Note.2: 150mVp-p
SWITCHING FREQENCY: 40KHz ~ 1000KHz
EXTERNAL CAPACITANCE LOAD (max.): 2.2uF

INPUT

VOLTAGE RANGE: 12 ~ 56VDC
EFFICIENCY (Typ.)^Note.3: 95%
DC CURRENT Full load^Note.3: 250mA
DC CURRENT No load: 6mA
FILTER: Capacitor

REMOTE ON/OFF & 3 IN 1 DIMMING

REMOTE ON/OFF: Leave open if not use Power ON with dimming: DIM ~ -Vin >2.5 ~ 15VDC or open circuit Power OFF : DIM ~ -Vin < 0.3VDC or short
PWM FREQUENCY: 100 ~ 1KHz (4mA at PWM dimming off)
3 IN 1 DIMMING: 0 ~ 10V / PWM / Resistor Dimming

PROTECTION

SHORT CIRCUIT: Regulated at rated output current Protection type: Can be continued, recovers automatically after fault condition is removed
OVER TEMPERATURE: Tj 150℃ typically(IC1) detect on main control IC Protection type : Shut down, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.: -40 ~ + 55℃(Refer to derating curve) @ full load
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -55 ~ +125℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03% / ℃
VIBRATION: 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
OPERATING CASE TEMP. (max.): 90℃

SAFETY & EMC

SAFETY STANDARDS: EAC TP TC 020/2011 approved
EMC EMISSION: Compliance to BS EN/EN55015, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,6,8, light industry level, criteria A, EAC TP TC 020

OTHERS

MTBF: 650Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 47*12*7mm or 1.85"*0.47"*0.28" inch (L*W*H)
PACKING: LDDS-HW: 9.5g, 36pcs/box, 0.43kg/box. 12 box per carton/6kg LDDS-HWB: 9.4g, 36pcs/box, 0.43kg/box. 12 box per carton/6kg
POTTING MATERIAL: Expoxy(UL94-V0)

Test conditions and notes5

1.All parameters are specified at normal input(48VDC), rated load, 25℃ 70% RH ambient.
2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μf capacitor.
3.Test condition: 48VDC input, 36VDC output without Dimming.
4.Output voltage will always step down 4 volts from input DC voltage.
5.The output of LDDS-H should not be connected to the input of the same unit or output from other sources.

Technical drawings

LDDS-300HWB Derating Curve — Derating Curve

LDDS-300HWB Standard Application(LDDS-HW series)(Remote — Standard Application(LDDS-HW series)(Remote

LDDS-300HWB 3 in 1 Dimming Control(LDDS-HWB — 3 in 1 Dimming Control(LDDS-HWB

LDDS-300HWB Efficiency VS Output Voltage(Number — Efficiency VS Output Voltage(Number

LDDS-300HWB Pin Configuration — Pin Configuration

Typical applications

Downloads

Certificates3

Mean Well LDDS-H EMC Certificate PDF Download

Mean Well LDDS-xxxHWx-CE-dec Certificate PDF Download

Mean Well LDDS-xxxHWx-UK-dec Certificate PDF Download

FAQ

Can I use the LDDS-300HWB with a dimmable 300mA LED downlight?

Yes, if the downlight is a constant-current 300mA load and its operating range stays within the 2-45V output window. This is a step-down constant-current driver, so it is not intended for constant-voltage products.

Is the LDDS-300HWB suitable for compact signage lighting?

It can be suitable for constant-current signage modules that require 300mA and operate within 2-45V. Its compact 47 x 12 x 7 mm body and 3 in 1 dimming (0-10V, PWM or resistor) suit tight sign housings.

Can this driver power a small LED array with dimming capability?

Yes, if the array is a constant-current load rated for 300mA and the total forward voltage remains within the 2-45V range. The actual number of LEDs depends on the forward voltage of each LED, so it should be checked at the load level.

What should I check before pairing LEDs with the LDDS-300HWB?

The LEDs must be part of a constant-current system rather than a constant-voltage strip or module. This driver delivers 300mA across a 2-45V output range, and the allowable LED quantity depends on each LED's forward voltage.

Can the LDDS-300HWB be used in wet or temperature-variable locations?

It has an operating temperature range of -40°C to +55°C at full load (derating above that) and a working humidity of 20% to 90% RH non-condensing. The datasheet states no IP rating, so it is not specified for wet locations.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Model	Power	Voltage	Current	IP Rating
Mean Well HLG-120H-C350A Power Supply 150.5W 350mA - Adjustable	150.5W	430V	0.35A	IP65	View
Mean Well HLG-60H-24AB Power Supply 60W 24V - Adjustable and Dimmable 2.5A	60W	24V	2.5A	IP65	View
Mean Well APC-16-350 Power Supply 16W 350mA	16.8W	48V	0.35A	IP42	View
Mean Well XLN-60-48-B LED Driver 60W 48V IP67, 3 in 1 Dimming	60W	48V	1.25A	IP67	View
Mean Well XLG-200-12-AB Power Supply 192W 12V - Adjustable and Dimmable 16A	192W	12V	16A	IP67	View
Mean Well LPC-60-1750 Power Supply 60W 1750mA	59.5W	34V	1.75A	IP67	View
Mean Well LDH DC/DC LED Driver CC 1050mA - Step-up - with Wire	63W	60V	1.05A	IP20	View
Mean Well HLG-480H-24B Power Supply 480W 24V- Dimmable 20A	480W	24V	20A	IP67	View
Mean Well HLG-320H-12 Power Supply 264W 12V 22A	264W	12V	22A	IP67	View
Mean Well HLG-240H-24A Power Supply 240W 24V - Adjustable 10A	240W	24V	10A	IP65	View
Mean Well HLG-240H-12 Power Supply 192W 12V 16A	192W	12V	16A	IP67	View
Mean Well HLG-150H-24B Power Supply 150W 24V- Dimmable 6.3A	151.2W	24V	6.3A	IP67	View
Mean Well HLG-150H-24 Power Supply 150W 24V 6.3A	151.2W	24V	6.3A	IP67	View
Mean Well HLG-120H-C350B Power Supply 150.5W 350mA - Dimmable	150.5W	430V	0.35A	IP65	View
Mean Well HLG-120H-C350AB Power Supply 150.5W 350mA - Adjustable and Dimmable	150.5W	430V	0.35A	IP65	View
Mean Well ELG-240-54 Power Supply 240W 54V 4.45A	240.3W	54V	4.45A	IP67	View
Mean Well ELG-100-48A Power Supply 96W 48V - Adjustable 2A	96W	48V	2A	IP65	View
Mean Well APC-25-700 Power Supply 25W 700mA	25.2W	36V	0.7A	IP42	View
TD-50-500-1750-E1P1 50W 500-1750mA CC Triac LED Driver - Selectable Output	—	—	—	Indoor	View
LTECH DALI-50-500-1750-F1P1 50W 500mA ~ 1750mA CC Dali LED Driver - Selectable Output	50W	58V	0.5A	Indoor	View
LTECH DALI-36-200-1200-U1P1 36W 200mA ~ 1200mA CC Dali LED Driver - Selectable Output	36W	58V	1.2A	Indoor	View
LTECH DALI-10-100-400-F1P1 10W 100mA ~ 400mA CC Dali LED Driver - Selectable Output	10W	47V	0.1A	Indoor	View
Mean Well ODLC-65A-1750 Power Supply 65W 1750mA(Auxiliary DC output)	63W	36V	1.75A	IP67	View
Mean Well ODLC-65A-1400 Power Supply 65W 1400mA (Auxiliary DC output)	64.4W	46V	1.4A	IP67	View
Mean Well ODLC-65A-1050 Power Supply 65W 1050mA (Auxiliary DC output)	65.1W	62V	1.05A	IP67	View
Mean Well ODLC-65-1750 Power Supply 65W 1750mA, Dimmable	63W	36V	1.75A	IP67	View
Mean Well ODLC-65-1400 Power Supply 65W 1400mA, Dimmable	64.4W	46V	1.4A	IP67	View
Mean Well ODLC-65-1050 Power Supply 65W 1050mA, Dimmable	65.1W	62V	1.05A	IP67	View
Mean Well ODLC-45A-500 Power Supply 45W 500mA (Auxiliary DC output)	45W	90V	0.5A	IP67	View
Mean Well ODLC-45A-1400 Power Supply 45W 1400mA (Auxiliary DC output)	44.8W	32V	1.4A	IP67	View
Mean Well ODLC-45A-1050 Power Supply 45W 1050mA (Auxiliary DC output)	45.15W	43V	1.05A	IP67	View
Mean Well ODLC-45-500DA Power Supply 45W 500mA, DALI	45W	90V	0.5A	IP67	View
Mean Well ODLC-45-500 Power Supply 45W 500mA, Dimmable	45W	90V	0.5A	IP67	View
Mean Well ODLC-45-1400DA Power Supply 45W 1400mA, DALI	44.8W	32V	1.4A	IP67	View
Mean Well ODLC-45-1400 Power Supply 45W 1400mA, Dimmable	44.8W	32V	1.4A	IP67	View
Mean Well ODLC-45-1050DA Power Supply 45W 1050mA, DALI	45.15W	43V	1.05A	IP67	View
Mean Well ODLC-45-1050 Power Supply 45W 1050mA, Dimmable	45.15W	43V	1.05A	IP67	View
Mean Well IDLC-65A-1750 Power Supply 65W 1750mA(Auxiliary DC output)	63W	36V	1.75A	IP20	View
Mean Well IDLC-65A-1400 Power Supply 65W 1400mA (Auxiliary DC output)	64.4W	46V	1.4A	IP20	View
Mean Well IDLC-65A-1050 Power Supply 65W 1050mA (Auxiliary DC output)	65.1W	62V	1.05A	IP20	View
Mean Well IDLC-65-1750DA Power Supply 65W 1750mA, DALI	63W	36V	1.75A	IP20	View
Mean Well IDLC-65-1750 Power Supply 65W 1750mA, Dimmable	63W	36V	1.75A	IP20	View
Mean Well IDLC-65-1400DA Power Supply 65W 1400mA, DALI	64.4W	46V	1.4A	IP20	View
Mean Well IDLC-65-1400 Power Supply 65W 1400mA, Dimmable	64.4W	46V	1.4A	IP20	View
Mean Well IDLC-65-1050DA Power Supply 65W 1050mA, DALI	65.1W	62V	1.05A	IP20	View
Mean Well IDLC-65-1050 Power Supply 65W 1050mA, Dimmable	65.1W	62V	1.05A	IP20	View
LTECH TD-30-300-900-EFP1 30W 300mA ~ 900mA CC Triac LED Driver - Selectable Output	30W	45V	0.3A	Indoor	View
LTECH TD-20-200-700-EFP1 20W 200mA ~ 700mA CC Triac LED Driver - Selectable Output	20W	45V	0.2A	Indoor	View
LTECH TD-15-150-700-EFP1 15W 150mA ~ 700mA CC Triac LED Driver - Selectable Output	15W	45V	0.15A	Indoor	View
LTECH TD-25-200-900-EFP1 25W 200mA ~ 900mA CC Triac LED Driver - Selectable Output	25W	45V	0.2A	Indoor	View

Please log in to write a review.

{ "id":8649402581312, "variants" :[{ "context":"default", "variant_id": 46609925079360, "sku":"LDDS-300HWB", "inventory_qty" : 0, "customer" :true, "custom_html" :"\u003cdiv class=\"price\"\u003e\n \u003cdiv class=\"price__default\"\u003e\n \u003cstrong class=\"price__current\"\u003e$11.12\u003c\/strong\u003e\n \u003cs class=\"price__was\"\u003e\u003c\/s\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"unit-price relative\" hidden\u003e\u003cspan class=\"visually-hidden\"\u003eUnit price\u003c\/span\u003e\u003cspan class=\"unit-price__price\"\u003e\u003c\/span\u003e\u003cspan class=\"unit-price__separator\"\u003e \/ \u003c\/span\u003e\u003cspan class=\"unit-price__unit\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\n \u003cdiv class=\"price__no-variant\" hidden\u003e\n \u003cstrong class=\"price__current\"\u003eUnavailable\u003c\/strong\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }