UDF250A Unipolar Distribution Block UDF 250 A


Download Product Brochure here https://www.erico.com/part.asp?part=UDF-250A


  • Tinned copper or aluminum block allows for copper or aluminum conductor direct connections, or using ferrule
  • Screw retaining cover is hinged and removable
  • Design allows for visual inspection of conductor and confirmation of connection
  • Modular snap-together blocks for building multi-pole power blocks
  • Easily clips onto DIN rail or mounts to panel with screws
  • 95% fill ratio
  • RoHS compliant
  • Conforms to EN 45545 obtaining an HL3 classification for chapter R23 and HL2 classification for chapter R22
  • Halogen free


Part Number UDF-250A
Article Number 569041
Finish Tinned
Max Current Rating, IEC 250 A
Max Current Rating, UL/CSA 255 A
Line Side Connection Flat Conductor
Load Side Connection 6 Cables
Material Copper
Line Side Max Conductor Size, IEC 70 mm²
Load Side Max Conductor Size, IEC 16 mm²
Max Working Voltage, IEC (Ui) 1,000 VAC/DC
Max Working Voltage, UL (Vin) 600 V
Short Term Withstand Current (Icw) 1s 23 kA
Peak Short Circuit Current (Ipk) 23 kA
Rated Conditional Short-Circuit Current (Icc) 11.5 kA
Short Circuit Current Rating (SCCR) 100 kA
Line Side Number of Connections 1
Load Side Number of Connections 6
Load Side Compact Stranded Wire Size (6) 2,5 – 16 mm²
Load Side Stranded Wire Size – Ferrule (6) 2,5 – 16 mm²
Load Side Wire Size (6) #14 – #4
Enclosure Rating IP 20
Depth 46 mm
Height 79 mm
Width 29 mm
Unit Weight 0.15 kg
Certification Details UL® 1059
Flammability Rating UL® 94V-0
Complies With IEC® 60947-7-1
Certifications CE, ERIFLEX UD
EAC 02942 (Russian Federation)
EN 45545 HL3/R23, UD/BD/TD/SB
Standard Packaging Quantity 1 pc
UPC 78285666415
EAN-13 8711893066319
Design Guideline for Distribution Blocks, Power Blocks and Power Terminals
Derating according to Ambient* Temperature (°C) to maintain working temperature of 85°C
Ambient Temperature (°C) 30° 35° 40° 45° 50° 55° 60° 65° 70° 75°
Derating Coefficient (d) 1 1 1 0.94 0.88 0.82 0.75 0.67 0.58 0.47
*environment around the terminal blocks inside the enclosure
Increase the number of outputs with one input using a jumper on blocks with a Max Current Rating, IEC up to 160 A.
Blocks with 1,000 VAC/DC Max Working Voltage, UL are ideal for solar applications.


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