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Mean Well DDRH-45-12ST Ultra Wide Input DC-DC Converter, 45W 12V, Screw Terminal Type 3.75A

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

SKU DDRH-45-12ST

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Overview

DDRH-45-12ST is the 12V output model of this series: rated power 45W, typical efficiency 85%.

DDRH-45 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-45 is designed to meet UL1741and 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-45-12STSpecifications from the official datasheet (2024-10-18 edition)

INPUT

INPUT VOLTAGE (RANGE): Nominal 800Vdc (150~1500Vdc)
INPUT CURRENT NO LOAD: 0.2mA
INPUT CURRENT FULL LOAD: 75mA
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

OUTPUT VOLTAGE: 12V
OUTPUT CURRENT: 3.75A
EFFICIENCY (Typ.): 85%
CAPACITOR LOAD (MAX.): 3750μF
VOLTAGE ACCURACY: ±2.0%
RATED POWER: 45W
RIPPLE & NOISE^Note.2: 12 ~ 24Vo: 100mVp-p 48Vo: 150mVp-p
LINE REGULATION: ±1%
LOAD REGULATION: ±1% (10% Load to Full Load)
SWITCHING FREQUENCY (Typ.): 28 ~ 75.6KHz
HOLD UP TIME: 20ms min. @Vin=800Vdc
SETUP TIME: 2s 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: 132Vdc
DC INPUT UNDER VOLTAGE LOCKOUT Shutdown voltage: 121Vdc

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% / ℃ (-40℃ ~ 50℃) Typ.
VIBRATION: Meets: MIL.STD-810F Table 514.5C-VⅢ, 15-2000Hz, X,Y,Z axis, 1hr (each axis), total 3hrs
OPERATING ALTITUDE^Note.3: 5000 meters
OVER VOLTAGE CATEGORY: Ⅱ; According to EN62109-1; altitude up to 5000 meters

SAFETY & EMC (Note.4)

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: 316Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): P Type: 89*63.5*25mm, ST Type: 135*70*32mm, DR Type: 135*70*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 : 240g ; 6pcs/Tray, 18pcs/per carton ST Type : 305g ; 6pcs/Tray, 18pcs/per carton DR Type : 310g ; 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-45-12ST ‧Tolerance: x.x±0.7mm (x.x±0.0275") — ‧Tolerance: x.x±0.7mm (x.x±0.0275")

DDRH-45-12ST ‧Tolerance: x.x±0.7mm (x.x±0.0275") (2) — ‧Tolerance: x.x±0.7mm (x.x±0.0275") (2)

DDRH-45-12ST DDRH-45-xxST (Screw Terminal Type) — DDRH-45-xxST (Screw Terminal Type)

DDRH-45-12ST DDRH-45-xxDR (DIN Rail Type) — DDRH-45-xxDR (DIN Rail Type)

DDRH-45-12ST Installation Instruction(DDRH-45-xxDR only) — Installation Instruction(DDRH-45-xxDR only)

DDRH-45-12ST External Fuse Wiring Instruction — External Fuse Wiring Instruction

DDRH-45-12ST DDRH-45-xxST — DDRH-45-xxST

DDRH-45-12ST DDRH-45-xxDR — DDRH-45-xxDR

Typical applications

Downloads

Datasheet1

DDRH-45-12ST datasheetDDRH_45_spec_sheet.pdf · 2024-10-18 edition PDF Download

FAQ

Can I use the DDRH-45-12ST to supply 12V control power in a medium-voltage switchgear panel?

Yes, provided the panel's DC source is within the 150–1500VDC input range (nominal 800VDC); lower auxiliary bus voltages are outside the input rating. The screw-terminal connections simplify field wiring, and the 45W, 12V, 3.75A output can power relays, annunciators, and panel lighting.

Is the DDRH-45-12ST suitable for powering 12V sensors and transmitters in a process control system?

The regulated 12V output at up to 3.75A supports 4–20 mA transmitters, pressure sensors, and flow meters commonly found in process control and SCADA installations. The screw terminal format simplifies integration with field cable runs.

Can this converter power a 12V industrial Ethernet switch in a factory automation network?

A 45W, 12V supply at 3.75A is adequate for most unmanaged and compact managed industrial Ethernet switches. The –40°C to +80°C operating range (with derating per the derating curve) suits production floors with wide temperature fluctuations.

What is the difference between the DDRH-45-12ST and the other DDRH-45-12 models?

The DDRH-45-12ST uses screw terminal connections and measures 135×70×32 mm, weighing 0.305 kg. The DDRH-45-12DR has the same footprint but is 43.5 mm deep (0.31 kg) and includes a DIN rail clip. The DDRH-45-12P is a PCB-mount module at 89×63.5×25 mm (0.24 kg). All three are rated 45W, 12V, 3.75A.

Can the DDRH-45-12ST be installed in an outdoor junction box?

The converter itself has no IP ingress-protection rating, so direct outdoor exposure is not recommended. When installed inside an IP54 or better-rated outdoor enclosure, the –40°C to +80°C operating range accommodates most climatic conditions.

Is the DDRH-45-12ST suitable for dusty industrial environments?

Only inside a suitable enclosure. The sheet gives no IP dust rating for the unit, so in environments with heavy particulate it should be installed in an enclosure with appropriate filtration or sealing.

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Model	Power	Voltage	Current	IP Rating
Mean Well DDRH-45-48ST Ultra Wide Input DC-DC Converter, 45W 48V, Screw Terminal Type 938mA	45W	48V	0.938A	IP20	View
Mean Well DDRH-45-48P Ultra Wide Input DC-DC Converter, 45W 48V, PCB Type 938mA	45W	48V	0.938A	IP20	View
Mean Well DDRH-45-48DR Ultra Wide Input DC-DC Converter, 45W 48V, Din Rail Type 938mA	45W	48V	0.938A	IP20	View
Mean Well DDRH-45-24ST Ultra Wide Input DC-DC Converter, 45W 24V, Screw Terminal Type 1.87A	45W	24V	1.87A	IP20	View
Mean Well DDRH-45-24P Ultra Wide Input DC-DC Converter, 45W 24V, PCB Type 1.87A	45W	24V	1.87A	IP20	View
Mean Well DDRH-45-24DR Ultra Wide Input DC-DC Converter, 45W 24V, Din Rail Type 1.87A	45W	24V	1.87A	IP20	View
Mean Well DDRH-45-15ST Ultra Wide Input DC-DC Converter, 45W 15V, Screw Terminal Type 3A	45W	15V	3A	IP20	View
Mean Well DDRH-45-15P Ultra Wide Input DC-DC Converter, 45W 15V, PCB Type 3A	45W	15V	3A	IP20	View
Mean Well DDRH-45-15DR Ultra Wide Input DC-DC Converter, 45W 15V, Din Rail Type 3A	45W	15V	3A	IP20	View
Mean Well DDRH-45-12P Ultra Wide Input DC-DC Converter, 45W 12V, PCB Type 3.75A	45W	12V	3.75A	IP20	View
Mean Well DDRH-45-12DR Ultra Wide Input DC-DC Converter, 45W 12V, Din Rail Type 3.75A	45W	12V	3.75A	IP20	View

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