Guardian 24V Rectifier

Guardian 24V Rectifier


Product Information

The Guardian FMP20.24G 75 amp rectifier is a 2000W, AC to DC power-factor-corrected (PFC) power supply unit that converts standard AC mains power into DC output in the range of 23 – 28.5VDC for powering telecommunication, data communication and other distributed power applications and can be used in hot-swap redundant systems.

The 75 amp rectifier incorporates resonance-soft-switching technology to reduce component stresses, providing increased system reliability and very high efficiency.

A wide variety of distribution options are available to provide the maximum system flexibility for a wide range of communications applications that demand efficiency, reliability, and flexibility including wireless base stations, remote switches and broadband access. Status information is provided with front panel LEDs and via RS485 management interface.

The FMP20.24 75 amp rectifier meets international safety standards and displays the CE-Mark for the European Low Voltage Directive (LVD).

Three Year warranty
Features and Options
  • Highly efficient topology with power factor correction
  • Wide output voltage range: 23-28.5VDC
  • High density design: 1.4kW/l
  • 1U high: 4.2” x 1.6” x 13.3” cassette
  • RS485 interface status and control
  • RS485 voltage and current limit setting
  • Over temperature, output over voltage and output overcurrent protection, Power limitation
Voltage Operating Range: 85-275VAC
Permitted variation: 85-300VAC
(L-PE and N-PE <250VAC)
Current <9.0A @ 240VAC
<14.1A @ 110VAC
Frequency 47-63Hz
Power Factor >0.96 at >30% load
Fuse Two 25A fast blow (L & N)
Voltage Range 23-28.5VDC
Power 2000W at ≥180VAC
1337W at 110VAC
1100W at 85VAC
Current 24V NOMINAL

83.3A at ≥180VAC
55.7A at 110VAC
45.8A at 85VAC


74.6A at ≥180VAC
50.0A at 110VAC
41.1A at 85VAC

Derating 9.5W/Vin from 180-85Vin
Efficiency >92.5% at 230VAC, 50-100% load
Tolerance Vout ±1.0%
Transient Response ±3% at load variation 10-90% or 90-10%
Load Sharing <5% of nominal current
Ripple <100mV p-p (BW 20MHz)
Psophometric <2mV, according to CCITT norms
Safety CAN/CSA C22.2 No 62368-1:2014
UL 62368-1:2014
EN 62368-1:2014/A11:2017
Inrush Current ETSI ETS 300 132-1
Harmonics EN61000-3-2
EMC ETSI EN300 386 V.1.3.2
EN61000-6-1, EN61000-6-2
EN61000-6-3, EN61000-6-4
EN55024 Performance criterion A
EN55022 Class B
Telcordia NEBS GR1089
Environmental Storage: ETSI EN300 019-2-1
Transport: ETSI EN300 019-2-2
Operation: ETSI EN300 019-2-3
Damp Heat: IEC60068-2-78
Dimensions, inches (mm) 4.2 W x 14.0 D x 1.6 H (107 W x 355 D x 41 H)
Weight 4.6lbs. (2.1kg)
Cooling Fan-cooled, speed controlled
Insulation 4.25kVDC primary-secondary
2.12kVDC primary-ground
0.2kVDC secondary-ground
Enclosure IP20
Mounting 19in/23in x 1U subrack
up to 4/5 modules
Protection Short circuit
automatic current/power limiting
input/output overvoltage
Alarms Fan failure
Short circuit/arcing protection
High temperature/output voltage
Low output voltage,
Input voltage out of range
Low fan speed (warning)
Internal communication failure
LED Indicators Green: AC normal operation
Yellow steady: Low fan speed, High temperature
Yellow flashing: Comms. failure
Red: Module alarm / shutdown
Audible Noise (nominal input) <54.5dBA @ ≤25°C (70% load)
Operating Temperature -40°C to +75°C up to 2000m
Reduced spec -40°C to -20°C
Derated output power from 55°C linear derating to 75°C
For 3000m altitude derated by 5°C
Storage Temperature -60°C to +85°C
MTBF @ 25°C (without fan) >350,000 hours to MIL-HDBK-217F-2
Power 1
Current 1
FMP20.24 120VAC 1337W 55.7A @ 24V
50.0A @ 26.8V
208VAC 2000W 83.3A @ 24V
74.6A @ 26.8V
240VAC 2000W 83.3A @ 24V
74.6A @ 26.8V

For more information, please visit the UNIPOWER Brand page for this product HERE