Guardian FMP series rectifier

Product Information

The Guardian FMP20.48 42 amp rectifier incorporates resonant technology to reduce component stresses, providing increased system reliability and a best-in-class efficiency. The rectifier features a wide input operating voltage range to maximize power availability within demanding utility power environments.

These compact 42 amp rectifiers support up to 10kW in a 1RU 23” shelf. 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.


Features and Options
  • Power density of up to 21.6W/in³
  • Rugged input voltage range
  • Thermal protection
  • Hot-swappable
  • 92.5% typical efficiency
  • International standards compliance
VoltageOperating Range: 85-275VAC
Permitted variation: 85-300VAC
(L-PE and N-PE <250VAC)
Current<10.1A @ 240VAC
<13.8A @ 110VAC
Power Factor>0.98
FuseTwo 25A fast blow (L & N)
Voltage Range46-57.6VDC
Power2000W at ≥180VAC
1120W at 110VAC
806W at 85VAC
Current48V NOMINAL

41.6A at ≥180VAC
23.4A at 110VAC
16.8A at 85VAC

37.3A at ≥180VAC
20.1A at 110VAC
15.0A at 85VAC
Derating15.7W/Vin from 180-85Vin
ToleranceVout ±1.0%
Transient Response±5% at load variation 10-90% or 90-10%
20ms recovery
Load Sharing<5% of nominal current
Ripple<100mV p-p (BW 20 MHz)
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 CurrentETSI ETS 300 132-1
EMCETSI 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
EnvironmentalStorage: ETSI EN300 019-2-1
Transport: ETSI EN300 019-2-2
Operation: ETSI EN300 019-2-3
Damp Heat: IEC60068-2-78
MIL-STD-810D section 507.2
Earthquake: GR 63 Core Zone 4
Dimensions, inches (mm)4.2 W x 14.0 D x 1.6 H (107 W x 355 D x 41 H)
Weight4.6lbs. (2.1kg)
CoolingFan-cooled, speed controlled
Insulation4.25kVDC primary-secondary
2.12kVDC primary-ground
0.2kVDC secondary-ground
Mounting19in/23in x 1U subrack
up to 4/5 modules
ProtectionShort circuit
automatic current/power limiting
input/output overvoltage
AlarmsFan 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 IndicatorsGreen: AC normal operation
Yellow steady: Low fan speed, High temperature
Yellow flashing: Comms. failure
Red: Module alarm / shutdown
Audible Noise (nominal input)<45dBA @ ≤25°C (50% load)
<60dBA (100% 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)>273,000 hours to MIL-HDBK-217F-2