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Mean Well DDRH-30-12ST Ultra Wide Input DC-DC Converter, 30W 12V, Screw Terminal Type 2.5A

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

SKU DDRH-30-12ST

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Overview

DDRH-30-12ST is the 12V output model of this series: rated power 30W, typical efficiency 85%.

DDRH-30 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-30 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-30-12STSpecifications 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: 50mA
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: 2.5A
EFFICIENCY (Typ.): 85%
CAPACITOR LOAD (MAX.): 2500μF
VOLTAGE ACCURACY: ±2.0%
RATED POWER: 30W
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: 16ms 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: 144Vdc
DC INPUT UNDER VOLTAGE LOCKOUT Shutdown voltage: 132Vdc

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

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^Note.4: 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/Burest 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/Burest	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: 318Khrs 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-30-12ST ‧Tolerance: x.x±0.7mm (x.x±0.0275") — ‧Tolerance: x.x±0.7mm (x.x±0.0275")

DDRH-30-12ST ‧Tolerance: x.x±0.7mm (x.x±0.0275") (2) — ‧Tolerance: x.x±0.7mm (x.x±0.0275") (2)

DDRH-30-12ST DDRH-30-xxST (Screw Terminal Type) — DDRH-30-xxST (Screw Terminal Type)

DDRH-30-12ST DDRH-30-xxDR (DIN Rail Type) — DDRH-30-xxDR (DIN Rail Type)

DDRH-30-12ST Installation Instruction(DDRH-30-xxDR only) — Installation Instruction(DDRH-30-xxDR only)

DDRH-30-12ST External Fuse Wiring Instruction — External Fuse Wiring Instruction

DDRH-30-12ST DDRH-30-xxST — DDRH-30-xxST

DDRH-30-12ST DDRH-30-xxDR — DDRH-30-xxDR

Typical applications

Downloads

Datasheet1

DDRH-30-12ST datasheetDDRH_30_spec_sheet.pdf · 2024-10-18 edition PDF Download

FAQ

Can the DDRH-30-12ST power 12V field devices or remote terminal units using screw terminal connections?

Yes. The DDRH-30-12ST is a screw terminal DC-DC converter providing 30W at 12V and 2.5A, making it appropriate for powering 12V field devices such as remote terminal units (RTUs), small controllers, or sensors where screw terminal wiring is standard practice. Its 10:1 input range (150–1500VDC) accommodates diverse DC source voltages.

Is the DDRH-30-12ST suitable for use in ruggedized industrial enclosures with screw-terminal wiring practice?

Yes. The screw terminal form factor of the DDRH-30-12ST is well-suited for industrial panel builders and system integrators who wire using terminal blocks rather than connectors or PCB board mounting. At 30W and 2.5A, it powers lightweight 12V automation and control loads in these enclosures.

Can this converter power 12V relay modules or output cards in a control system?

Yes. The DDRH-30-12ST provides 30W at 2.5A, sufficient to drive 12V relay modules, output expansion cards, or small actuator coils used in industrial control systems. Its overload and short-circuit protection use hiccup mode with automatic recovery.

What environmental temperature range does the DDRH-30-12ST support?

The DDRH-30-12ST is rated for -40°C to +80°C (with load derating at higher ambient temperatures per the derating curve), supporting deployments in cold-weather outdoor cabinets, freezer automation, or high-temperature factory environments. No IP rating is specified, so the enclosure around the unit must provide appropriate ingress protection for the installation environment.

What is the difference between the DDRH-30-12ST and the other 30W 12V models in the DDRH series?

The DDRH-30-12ST (screw terminal, 135.0 × 70.0 × 32.0 mm, 0.305 kg), DDRH-30-12DR (DIN rail, 135.0 × 70.0 × 43.5 mm, 0.31 kg), and DDRH-30-12P (PCB mount, 89.0 × 63.5 × 25.0 mm, 0.24 kg) all share 30W, 12V, 2.5A output and 150–1500VDC input. The key difference is the mechanical form factor for mounting and wiring.

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Model	Power	Voltage	Current	IP Rating
Mean Well DDRH-30-48ST Ultra Wide Input DC-DC Converter, 30W 48V, Screw Terminal Type 625mA	30W	48V	0.625A	IP20	View
Mean Well DDRH-30-48P Ultra Wide Input DC-DC Converter, 30W 48V, PCB Mounting Type 625mA	30W	48V	0.625A	IP20	View
Mean Well DDRH-30-48DR Ultra Wide Input DC-DC Converter, 30W 48V, Din Rail Type 625mA	30W	48V	0.625A	IP20	View
Mean Well DDRH-30-24ST Ultra Wide Input DC-DC Converter, 30W 24V, Screw Terminal Type 1.25A	30W	24V	1.25A	IP20	View
Mean Well DDRH-30-24P Ultra Wide Input DC-DC Converter, 30W 24V, PCB Mounting Type 1.25A	30W	24V	1.25A	IP20	View
Mean Well DDRH-30-24DR Ultra Wide Input DC-DC Converter, 30W 24V, Din Rail Type 1.25A	30W	24V	1.25A	IP20	View
Mean Well DDRH-30-15ST Ultra Wide Input DC-DC Converter, 30W 15V, Screw Terminal Type 2A	30W	15V	2A	IP20	View
Mean Well DDRH-30-15P Ultra Wide Input DC-DC Converter, 30W 15V, PCB Mounting Type 2A	30W	15V	2A	IP20	View
Mean Well DDRH-30-15DR Ultra Wide Input DC-DC Converter, 30W 15V, Din Rail Type 2A	30W	15V	2A	IP20	View
Mean Well DDRH-30-12P Ultra Wide Input DC-DC Converter, 30W 12V, PCB Mounting Type 2.5A	30W	12V	2.5A	IP20	View
Mean Well DDRH-30-12DR Ultra Wide Input DC-DC Converter, 30W 12V, Din Rail Type 2.5A	30W	12V	2.5A	IP20	View

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