💡 New range: Boke DALI-2 LED drivers | 10–240 W | 5-year warranty Explore the range

☎ 0800 88 87 86  |  +64 22 522 4414

Over 15 years experience of providing support of MEAN WELL Power Supplies

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

Mean Well

LDH-25-350W

constant currentstep uphigh efficiency up to 95%wire style
SKU LDH-25-350W
Log in to see price Trade pricing & online ordering for account holders
Log in or apply for a trade account →
Available to order
|

Overview

LDH-25-350W is the model of this series: rated current 350mA, rated power 25.2W, typical efficiency 92%/12V 95%/24V. Type W: Lead wire style.

LDH-25 series is a 25W DC/DC LED driver featuring constant current output. LDH-25 operates from 9.5～32VDC and offers models with different rated current ranging between 250mA and 700mA. With the high efficiency up to 95.5%, The 94V-0 flame retar-dant plastic case the fully-potted silicore e enhance the heat dissipation allows this series to fit solar LED street light.

Features

  • Wide DC input voltage operation 9.5~32V
  • DC/DC step-up converter
  • Constant current output : 250mA to 700mA
  • Wide output LED forward voltage up to 84V DC
  • High efficiency up to 95.5%
  • 2 in 1 dimming (0-10V, PWM)
  • Protections: Short circuit / Over voltage
  • Cooling by free air convection
  • Fully encapsulated
  • 3 years warranty

Specifications

LDH-25-350WSpecifications from the official datasheet (2024-10-16 edition)

OUTPUT

RATED CURRENT
350mA
CURRENT ACCURACY(Typ.)
±5% at 12VDC input and 24 VDC Input
VOLTAGE RANGENote.2
12.5~72VDC
RATED POWER
25.2W
CURRENT RIPPLE
5%(@rated current)

INPUT

VOLTAGE RANGENote.2
9.5~32VDC
EFFICIENCY (Typ.)
92%/12V 95%/24V
DC CURRENT (Typ.)
2.5A/12VDC, 1.2A/24VDC

DIMMING

DIMMING FUNCTIONNote.2
Leave open if not used 1KHz-3KHz 10V PWM signal or 0-10V DC input
QUIESCENT INPUT CURRENT IN SHUTDOWN MODE(Typ.)
7mA when PWM dimming OFF @12VDC

PROTECTION

SHORT CIRCUIT
Output short circuit, the power supply will be damaged
OVER VOLTAGE
73~100V
NO LOAD
Output voltage rise to OVP, and drop equal to input voltage, re-power to recovery

ENVIRONMENT

WORKING TEMP.
-40 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes
SOLDERING TEMPERATURE
Wave soldering: 265℃,5s (max.); Manual soldering: 390℃,3s (max.)

SAFETY & EMC

SAFETY STANDARDS
LVD BS EN/EN61347-1, BS EN/EN61347-2-13, EAC TP TC 004 approved
EMC EMISSIONNote.5
Compliance to BS EN/EN55015;EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61547,BS EN/EN61000-4-2,3,4,6,8; light industry level,EAC TP TC 020

OTHERS

MTBF
12369.5K hrs min. Telcordia TR/SR-332(Bellcore); 896.4Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
52.4*27.2*24mm (L*W*H)
PACKING
Pin mounted style: 50g, 200pcs/11Kg/0.89CUFT; Lead wire style: 57g, 200pcs/12.4kg/0.98CUFT

MODEL ENCODING

Blank
Pin mounted style
W (this model)
Lead wire style
Test conditions and notes5
  1. 1.All parameters are specified at normal input(12VDC), rated load, 25℃ 70% RH ambient.
  2. 2.Non dimming application: Output voltage must step up by 3 Volts from input DC voltage Dimming application: Output voltage must be twice higher than the input DC voltage If input voltage down below 11V, the output current may drop to more than 80% of the rated current
  3. 3.This series meets the typical life expectancy of >35,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 80℃ or less.
  4. 4.The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
  5. 5.BS EN/EN55015 EMI testing layout is based on DC input with a battery source

Technical drawings

LDH-25-350W Mechanical Specification
Mechanical Specification
LDH-25-350W Standard Application
Standard Application
LDH-25-350W Efficiency VS Load
Efficiency VS Load
LDH-25-350W Application Notes of EMC
Application Notes of EMC

Typical applications

  • DC battery source lighting
  • Portable lighting
  • LED solar street lighting
  • LED greenhouse lighting
  • LED Low-bay lighting

Downloads

FAQ

Can I use the LDH-25-350W for a 350 mA LED downlight load?

Yes, this driver is designed for 350 mA constant current output and supports LED loads within a 12.5-72V constant current range. It is intended for constant current lighting loads, not constant voltage LED products.

Is the LDH-25-350W a fit for small LED arrays or channel-letter style LED modules?

It can be a fit when the LED load is specified for 350 mA constant current operation. The usable LED string voltage must stay within 12.5-72V, and the exact number of LEDs depends on the forward voltage of each LED.

Can this step-up driver be used where the LED string voltage is above the source voltage?

Yes, the LDH-25-350W accepts 9.5-32VDC input and can provide constant current output up to 72V. That makes it relevant for constant current LED systems where the required LED voltage is higher than the input supply range.

What should I verify before pairing LEDs with the LDH-25-350W?

Verify that the LEDs are intended for 350 mA constant current drive and that the full load operates inside the 12.5-72V constant current range. The driver does not define a fixed LED count because that depends on each LED's forward voltage.

Can the LDH-25-350W handle wide ambient temperature swings?

Its specified operating temperature range is -40°C to +70°C (refer to the derating curve). No IP rating is listed in the provided specs, so moisture and enclosure protection need to be addressed separately from the driver's temperature rating.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

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

Other LDH-25 Models

7 other models
ModelPowerVoltageCurrentIP Rating
LDH-25-700W 25.2W 36V 0.7A IP20 View
LDH-25-700 25.2W 36V 0.7A IP20 View
LDH-25-500W 25W 50V 0.5A IP20 View
LDH-25-500 25W 50V 0.5A IP20 View
LDH-25-350 25.2W 72V 0.35A IP20 View
LDH-25-250W 21W 84V 0.25A IP20 View
LDH-25-250 21W 84V 0.25A IP20 View
View all 48 LDH Series models
{ "id":8420904436011, "variants" :[{ "context":"default", "variant_id": 45622045573419, "sku":"LDH-25-350W", "inventory_qty" : 0, "customer" :false, "custom_html" :"\u003ca class=\"text-current logged-out-price logged-out\" href=\"https:\/\/wellforces.co.nz\/customer_authentication\/redirect?locale=en\u0026region_country=NZ\"\u003e\n \u003cspan \u003ePlease \u003c\/span\u003e \u003cspan class=\"login-text\"\u003eLogin\u003c\/span\u003e \u003cspan\u003e for Pricing\u003c\/span\u003e\n \u003c\/a\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }
LDH-25-350W
Mean Well

LDH-25-350W

Log in to see price

LDH-25-350W is the model of this series: rated current 350mA, rated power 25.2W, typical efficiency 92%/12V 95%/24V. Type W: Lead wire style.

LDH-25 series is a 25W DC/DC LED driver featuring constant current output. LDH-25 operates from 9.5～32VDC and offers models with different rated current ranging between 250mA and 700mA. With the high efficiency up to 95.5%, The 94V-0 flame retar-dant plastic case the fully-potted silicore e enhance the heat dissipation allows this series to fit solar LED street light.

Features

  • Wide DC input voltage operation 9.5~32V
  • DC/DC step-up converter
  • Constant current output : 250mA to 700mA
  • Wide output LED forward voltage up to 84V DC
  • High efficiency up to 95.5%
  • 2 in 1 dimming (0-10V, PWM)
  • Protections: Short circuit / Over voltage
  • Cooling by free air convection
  • Fully encapsulated
  • 3 years warranty

Typical applications

  • DC battery source lighting
  • Portable lighting
  • LED solar street lighting
  • LED greenhouse lighting
  • LED Low-bay lighting
View product

  • Call us

    0800 88 87 86

  • Email us

    contact@wellforces.co.nz

  • Business Hours

    Mon-Fri 8:30am-5:00pm

  • Wholesale and Trade Account

    Let's grow together
Back to top