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Mean Well DDRH-15-12ST Ultra Wide Input DC-DC Converter, 15W 12V, Screw Terminal Type 1.25A

150~1500VDC 10:1 ultra-wide input rangefanless design-40~80°C ultra-wide operating temperature

SKU DDRH-15-12ST

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Overview

DDRH-15-12ST is the 12V output model of this series: rated power 5Vo: 10W 12Vo ~ 24Vo: 15W, typical efficiency 79%.

DDRH-15 series is a 150 ~ 1500Vdc high reliable ultra-high input DC-DC converter which can supply stable working voltage for the load. Main features are as following: compact size, -40~+80℃ wide range operating temperature, 4KVac high isolation voltage, operation at 5000m altitude, low ripple & noise, complete protections and so on. Futhermore, this series also has DIN Rail type, it is suitable to be mounted on TS-35/7.5 or TS-35/15 rails. DDRH-15 is designed to meet UL1741 and IEC62109-1 standard. It is suitable for industrial automation, surveillance, telecommunication and can be widely deployed in the applications of new energy generation such as solar power, and windmill power generation, for instances, photovoltaic power systems, high voltage inverting , DC bus centralized application , ESS, charging pile, railway and so forth.

Features

150~1500Vdc 10:1 ultra-wide input range
4KVac I/O high isolation(Reinforced isolation)
Protections: Short circuit / Overload / Over voltage / DC input under voltage / DC input reverse Polarity
Fanless design, fully encapsulated, cooling by free air convection
Can be installed on DIN rail TS-35/7.5 or 15 (DR-Type)
-40~+80℃ ultra-wide operating temperature (＞+50℃ derating)
Operating altitude up to 5000 meters
3 years warranty

Specifications

DDRH-15-12STSpecifications from the official datasheet (2024-10-18 edition)

MODEL SELECTION TABLE

INPUT VOLTAGE (RANGE): Nominal 800Vdc (150~1500Vdc)
INPUT CURRENT NO LOAD: 0.2mA
INPUT CURRENT FULL LOAD: 30mA
OUTPUT VOLTAGE: 12V
OUTPUT CURRENT: 1.25A
EFFICIENCY (Typ.): 79%
CAPACITOR LOAD (MAX.): 1250μF

INPUT

VOLTAGE RANGE: 150 ~ 1500Vdc
FILTER: Internal capacitor
EXTERNAL INPUT FUSE: 4A/1500Vdc, required (Please refer to page 6 for more details)
INRUSH CURRENT (Typ.): Cold start 150A max. @ Vin=800Vdc

OUTPUT

VOLTAGE ACCURACY: ±2.0%
RATED POWER: 5Vo: 10W 12Vo ~ 24Vo: 15W
RIPPLE & NOISE^Note.2: 5 ~ 15Vo: 100mVp-p 24Vo: 150mVp-p
LINE REGULATION: ±1%
LOAD REGULATION: ±1% (10% Load to Full Load)
SWITCHING FREQUENCY (Typ.): 25 ~ 75.6KHz
HOLD UP TIME: 16ms min. @Vin=800Vdc
SETUP TIME: 1s max. @150~1500Vdc

PROTECTION

SHORT CIRCUIT: Protection type : Hiccup mode, continuous, automatic recovery
OVERLOAD: 110 ~ 300% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: Hiccup mode, recovers automatically after fault condition is removed
DC INPUT REVERSE POLARITY: By internal Bridge Diode, no damage, recovers automatically after fault condition removed
DC INPUT UNDER VOLTAGE LOCKOUT Start-up voltage: 147Vdc
DC INPUT UNDER VOLTAGE LOCKOUT Shutdown voltage: 137Vdc

ENVIRONMENT

WORKING TEMP.: -40 ~ +80℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.02% / ℃ (0 ~ 50℃)
VIBRATION: Component: 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting clip: Compliance to IEC60068-2-6
OPERATING ALTITUDE^Note.3: 5000 meters
OVER VOLTAGE CATEGORY: Ⅱ ; According to EN62109-1; altitude up to 5000 meters

SAFETY & EMC

SAFETY STANDARDS: UL1741 , CSA C22.2 No.107.1-16 , IEC62109-1 (LVD), EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:4KVac
ISOLATION RESISTANCE: I/P-O/P, 100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 Class A (with external components)
Radiated BS EN/EN55032 Class A (with external components)
EMC IMMUNITY: BS EN/EN55035

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact, criteria A
Radiated Susceptibility BS EN/EN61000-4-3 Level 3, 10V, criteria A
EFT/Bursts BS EN/EN61000-4-4 Level 2, 0.5KV, criteria A
Surge BS EN/EN61000-4-5 Level 4, 2KV/Vin+ ~ Vin-, criteria A
Conducted BS EN/EN61000-4-6 Level 3, 10V, criteria A

Parameter	Standard	Test Level
Conducted	BS EN/EN55032	Class A (with external components)
Radiated	BS EN/EN55032	Class A (with external components)

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact, criteria A
Radiated Susceptibility	BS EN/EN61000-4-3	Level 3, 10V, criteria A
EFT/Bursts	BS EN/EN61000-4-4	Level 2, 0.5KV, criteria A
Surge	BS EN/EN61000-4-5	Level 4, 2KV/Vin+ ~ Vin-, criteria A
Conducted	BS EN/EN61000-4-6	Level 3, 10V, criteria A

OTHERS

MTBF: 388Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): P Type: 76.2*50.8*25mm, ST Type: 122.3*57.3*32mm, DR Type: 122.3*57.3*43.5mm
CASE MATERIAL: Non-conductive black plastic (UL 94V-0 rated)
POTTING MATERIAL: UL 94V-0
PIN MATERIAL: Base: copper, Plating: Matte Tin
PACKING: P Type : 170g ; 6pcs/Tray, 18pcs/per carton ST Type : 210g ; 6pcs/Tray, 18pcs/per carton DR Type : 215g ; 6pcs/Tray, 18pcs/per carton

Test conditions and notes4

1. All parameters NOT specially mentioned are measured at 800Vdc input, rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μf & 47μf parallel capacitor.
3. 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).
4. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on http://www.meanwell.com)

Technical drawings

DDRH-15-12ST ‧Tolerance: x.x±0.7mm (x.x±0.0275") — ‧Tolerance: x.x±0.7mm (x.x±0.0275")

DDRH-15-12ST ‧Tolerance: x.x±0.7mm (x.x±0.0275") (2) — ‧Tolerance: x.x±0.7mm (x.x±0.0275") (2)

DDRH-15-12ST DDRH-15-xxST (Screw Terminal Type) — DDRH-15-xxST (Screw Terminal Type)

DDRH-15-12ST DDRH-15-xxDR (DIN Rail Type) — DDRH-15-xxDR (DIN Rail Type)

DDRH-15-12ST Installation Instruction(DDRH-15-xxDR only) — Installation Instruction(DDRH-15-xxDR only)

DDRH-15-12ST External Fuse Wiring Instruction — External Fuse Wiring Instruction

DDRH-15-12ST DDRH-15-xxST — DDRH-15-xxST

DDRH-15-12ST DDRH-15-xxDR — DDRH-15-xxDR

Typical applications

Downloads

Datasheet1

DDRH-15-12ST datasheetDDRH_15_spec_sheet.pdf · 2024-10-18 edition PDF Download

FAQ

Can the DDRH-15-12ST power a 12V industrial Ethernet switch or communication module from a high-voltage DC bus?

Yes. The DDRH-15-12ST accepts a 150–1500VDC input and provides a stable 12V/1.25A output, making it appropriate for powering compact 12V communication modules, managed switches, or other low-power networking equipment in industrial control panels fed from high-voltage DC distribution.

Is the DDRH-15-12ST suitable for use in solar or wind energy storage systems with variable high-voltage DC inputs?

The DDRH-15-12ST is designed for a 10:1 ultra-wide input range from 150V to 1500VDC, which covers the variable bus voltages common in solar string inverters, battery storage systems, and wind turbine converters. It can power 12V auxiliary loads such as monitoring circuits or control logic at up to 15W.

Can I use this unit to derive 12V logic power in a high-voltage motor drive or servo amplifier enclosure?

Yes. The screw terminal connection style of the DDRH-15-12ST makes it practical to wire directly into a motor drive enclosure where high-voltage DC bus power is available. It provides 12V at up to 1.25A (15W) for powering auxiliary logic circuits, fans, or field bus interfaces within the drive cabinet.

What are the mounting and physical characteristics of the DDRH-15-12ST compared to other 15W 12V mounting options in this series?

The DDRH-15-12ST uses screw terminal connections and measures 122.3 × 57.3 × 32.0 mm at 0.21 kg. The DDRH-15-12P (PCB mount) is more compact at 76.2 × 50.8 × 25.0 mm and 0.17 kg, while the DDRH-15-12DR (DIN rail) is the largest at 122.3 × 57.3 × 43.5 mm and 0.215 kg. All share identical 15W/12V/1.25A output and 150–1500VDC input.

Is the DDRH-15-12ST fanless, and does that affect its suitability for sealed or vibration-prone enclosures?

Yes, the DDRH-15-12ST uses a fanless design with no moving parts, which suits sealed enclosures where ventilation is limited. For vibration, its components are tested at 10–500Hz, 3G along the X, Y and Z axes. Its -40°C to +80°C operating range (with load derating at high ambient per the derating curve) further supports demanding thermal conditions.

Does the 15W output of the DDRH-15-12ST limit what industrial devices it can power?

At 15W and 1.25A output, the DDRH-15-12ST is sized for low-power 12V loads such as sensors, signal converters, HMI displays under 15W, or logic power rails. It is not intended for loads requiring several amps at 12V; those need a higher-power converter.

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Model	Power	Voltage	Current	IP Rating
Mean Well DDRH-15-24ST Ultra Wide Input DC-DC Converter, 15W 24V, Screw Terminal Type 625mA	15W	24V	0.625A	IP20	View
Mean Well DDRH-15-24DR Ultra Wide Input DC-DC Converter, 15W 24V, Din Rail Type 625mA	15W	24V	0.625A	IP20	View
Mean Well DDRH-15-15ST Ultra Wide Input DC-DC Converter, 15W 15V, Screw Terminal Type 1A	15W	15V	1A	IP20	View
Mean Well DDRH-15-15DR Ultra Wide Input DC-DC Converter, 15W 15V, Din Rail Type 1A	15W	15V	1A	IP20	View
Mean Well DDRH-15-12DR Ultra Wide Input DC-DC Converter, 15W 12V, Din Rail Type 1.25A	15W	12V	1.25A	IP20	View
Mean Well DDRH-15-05ST Ultra Wide Input DC-DC Converter, 10W 5V, Screw Terminal Type 2A	10W	5V	2A	IP20	View
Mean Well DDRH-15-05DR Ultra Wide Input DC-DC Converter, 10W 5V, Din Rail Type 2A	10W	5V	2A	IP20	View
Mean Well DDRH-15-24P Ultra Wide Input DC-DC Converter, 15W 24V, PCB Mounting Type 625mA	15W	24V	0.625A	IP20	View
Mean Well DDRH-15-15P Ultra Wide Input DC-DC Converter, 15W 15V, PCB Mounting Type 1A	15W	15V	1A	IP20	View
Mean Well DDRH-15-12P Ultra Wide Input DC-DC Converter, 15W 12V, PCB Mounting Type 1.25A	15W	12V	1.25A	IP20	View
Mean Well DDRH-15-05P Ultra Wide Input DC-DC Converter, 10W 5V, PCB Mounting Type 2A	10W	5V	2A	IP20	View

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