DC Power Systems and Battery Chargers

Delta Eltek Flatpack S 24Vdc Rectifier Module

Compact. Rugged. Built for Critical Infrastructure. Engineered for the uncompromising demands of the railway, metro, and power utility sectors, the Eltek Flatpack S 24Vdc Rectifier delivers high-efficiency performance in one of the industry’s most compact and robust packages. Whether it’s controlling rail signals or powering PLC and alarm systems in substations, this rectifier provides stable, efficient power even in the harshest environments.

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Features

  • High Efficiency (92.5%): Reduces energy loss and heat, improving overall system performance and lowering operational costs.
  • Compact & Lightweight Design: Measures just 217mm deep and weighs under 850g, making it ideal for tight enclosures and retrofits.
  • Wide Input Range (85–305 VAC/DC): Operates reliably under global power conditions and supports both AC and DC inputs.
  • Hot-Pluggable for Easy Maintenance: Enables quick installation or replacement without system downtime.
  • Output Power: Up to 1000W / 41.7A: Delivers high power density with stable voltage for 24VDC critical applications.
  • Robust Protection & Alarm Integration: Built-in ORing, thermal, overvoltage, and short-circuit protection, with LED indicators and alarm relay for enhanced system safety.
Specifications
MANUFACTURER PART NUMBER
Model Flatpack S 24/1000HE Rectifier Module 
Manufacturer Part Number 241122.205
INPUT DATA
Nom. Input Voltage Range (Vac / Vdc) 185...305Vac / 185...300Vdc
Operating Input Voltage Range (Vac / Vdc) 185...305Vac / 185...300Vdc
Maximum Current (Arms) 5.9A RMS
Frequency (Hz) 45...66Hz
Power Factor > 0.99 at 50% Load or More
Protection Fuse; Shutdown when input voltage is above 305 Vac / 300 Vdc
OUTPUT DATA
Output Voltage - Default (Vdc) 26.7Vdc
Output Voltage - Adjustable Range (Vdc) 21...29Vdc¹
Max. Power @ Nominal Input (W) 1000W
Max. Current @ Nominal Input (A) 41.7A @ Vout < 24Vdc
Hold Up Time, Maximum Output Power >20ms; output voltage > 21 Vdc
Current Sharing (10-100% Load) ±5% of maximum current from 10 to 100% load
Static Voltage Regulation (10 - 100% Load) ±0.5%
Dynamic Voltage Regulation ±5.0% for 10-90% or 90-10% load variation, regulation time < 50ms
Ripple < 150 mVpp , 30 MHz bandwidth
Protection Blocking ORing Diode; Short Circuit Proof; High Temperature Protection; Over Voltage Shutdown
Efficiency 92.50%
Note ¹ from HW rev4 (sec SW rev 2.00) 
DISPLAY / ALARMS
Alarms: Via Red LED: Low Mains Shutdown, High and Low Temperature Shutdown, Rectifier Failure, Overvoltage shutdown on output, Fan Failure, Low Voltage Alarm, CAN bus failure  
Warnings: Via Yellow LED: Rectifier in power de-rate mode, Remote output current limit activated, Input voltage out of range, flashing at overvoltage.  
Normal Operation: Input / Output OK Indicated Via Green LED  
Potential Alarm Relay: Normally Closed, opens on alarm and mains outage.  
ENVIRONMENTAL
Cooling Fan Assisted
MTBF (Telcordia SR-232 Iss.3 Meth. II Case L1) >1 975 044 (@ T ambient: 25 °C)
Operating Temp. (5-95% RH n.cond. hum.) -40 to + 85°C
Operating Temperature (°C)
0...45°C: 100% Rated Power (1000W)
> 45°C: D-Rated to 400W @ 85°C
Storage Temperature (°C) -40 to +85°C; Humidity: 0 - 99% RH non-condensing
MECHANICAL
Dimensions [WxHxD] 72 x 41.5 x 217mm
Weight < 850g
DESIGN STANDARDS
Electrical safety EN 62368-1:2020+A11:2020, IEC 62368-1:2018, UL 62368-1:2019 IEC 60950-1:2013
EMC EN 61000-6-1:2019, -6-2:2019, -6-3:2007 + A1:2011, -6-4:2019 IEC 61000-6-5:2015, FCC CFR 47 Part 15:2013 ETSI EN 300 386v2.2.0, EN50121-4:2016 + A1:2019, -5:2017 + A1:2019
Environment ETSI EN 300 019: 2-1 (Class 1.2) & 2-2 (Class 2.3) Normal operating conditions as per IEC 62040-5-3:2016 clause 4.2. Other operating conditions as per IEC 62040-5-3:2016 clause 4.3, must be advised EU 2015/863 (RoHS), 2012/19/EU (WEEE), IEC 63000:2018
Marine DNVGL-CG-0339, ABS PDA Certificate²
Note ² only valid for part number 241122.205M
Downloads
datasheet-flatpack_s_241000_he_rectifier_module.pdf
MANUFACTURER PART NUMBER
Model Flatpack S 24/1000HE Rectifier Module 
Manufacturer Part Number 241122.205
INPUT DATA
Nom. Input Voltage Range (Vac / Vdc) 185...305Vac / 185...300Vdc
Operating Input Voltage Range (Vac / Vdc) 185...305Vac / 185...300Vdc
Maximum Current (Arms) 5.9A RMS
Frequency (Hz) 45...66Hz
Power Factor > 0.99 at 50% Load or More
Protection Fuse; Shutdown when input voltage is above 305 Vac / 300 Vdc
OUTPUT DATA
Output Voltage - Default (Vdc) 26.7Vdc
Output Voltage - Adjustable Range (Vdc) 21...29Vdc¹
Max. Power @ Nominal Input (W) 1000W
Max. Current @ Nominal Input (A) 41.7A @ Vout < 24Vdc
Hold Up Time, Maximum Output Power >20ms; output voltage > 21 Vdc
Current Sharing (10-100% Load) ±5% of maximum current from 10 to 100% load
Static Voltage Regulation (10 - 100% Load) ±0.5%
Dynamic Voltage Regulation ±5.0% for 10-90% or 90-10% load variation, regulation time < 50ms
Ripple < 150 mVpp , 30 MHz bandwidth
Protection Blocking ORing Diode; Short Circuit Proof; High Temperature Protection; Over Voltage Shutdown
Efficiency 92.50%
Note ¹ from HW rev4 (sec SW rev 2.00) 
DISPLAY / ALARMS
Alarms: Via Red LED: Low Mains Shutdown, High and Low Temperature Shutdown, Rectifier Failure, Overvoltage shutdown on output, Fan Failure, Low Voltage Alarm, CAN bus failure  
Warnings: Via Yellow LED: Rectifier in power de-rate mode, Remote output current limit activated, Input voltage out of range, flashing at overvoltage.  
Normal Operation: Input / Output OK Indicated Via Green LED  
Potential Alarm Relay: Normally Closed, opens on alarm and mains outage.  
ENVIRONMENTAL
Cooling Fan Assisted
MTBF (Telcordia SR-232 Iss.3 Meth. II Case L1) >1 975 044 (@ T ambient: 25 °C)
Operating Temp. (5-95% RH n.cond. hum.) -40 to + 85°C
Operating Temperature (°C)
0...45°C: 100% Rated Power (1000W)
> 45°C: D-Rated to 400W @ 85°C
Storage Temperature (°C) -40 to +85°C; Humidity: 0 - 99% RH non-condensing
MECHANICAL
Dimensions [WxHxD] 72 x 41.5 x 217mm
Weight < 850g
DESIGN STANDARDS
Electrical safety EN 62368-1:2020+A11:2020, IEC 62368-1:2018, UL 62368-1:2019 IEC 60950-1:2013
EMC EN 61000-6-1:2019, -6-2:2019, -6-3:2007 + A1:2011, -6-4:2019 IEC 61000-6-5:2015, FCC CFR 47 Part 15:2013 ETSI EN 300 386v2.2.0, EN50121-4:2016 + A1:2019, -5:2017 + A1:2019
Environment ETSI EN 300 019: 2-1 (Class 1.2) & 2-2 (Class 2.3) Normal operating conditions as per IEC 62040-5-3:2016 clause 4.2. Other operating conditions as per IEC 62040-5-3:2016 clause 4.3, must be advised EU 2015/863 (RoHS), 2012/19/EU (WEEE), IEC 63000:2018
Marine DNVGL-CG-0339, ABS PDA Certificate²
Note ² only valid for part number 241122.205M
datasheet-flatpack_s_241000_he_rectifier_module.pdf

Find the Right Model

Model Number Input Voltage (Vac) Output Voltage (Vdc) Max. Output Power (W / kW)
product variant Flatpack S 24V /1000HE Nom. 185...305Vac / 185...300Vdc 27.6Vdc (Adj. 21...29Vdc) 1000W

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