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SBTT-250 Tunnel-to-Tunnel Power Terminal


  • Tinned copper block allows for copper or aluminum conductor connections
  • Accessible tunnels allow for easy connection of wire
  • Design allows for visual inspection of conductor and confirmation of connection
  • Adjustable transparent cover
  • Gangable for building multi-pole power blocks
  • Easily clips onto DIN rail or mounts to panel with screws
  • SBLEC Power Terminals Fixing Accessory required for direct panel mount
  • Halogen free
  • RoHS compliant


Material: Copper; Thermoplastic
Finish: Tinned
Part Number SBTT-250
Article Number 561141
Max Current Rating, IEC 350 A
Max Current Rating, UL/CSA 300 A
Short Term Withstand Current (Icw) 1s 8.4 kA
Peak Short Circuit Current (Ipk) 30 kA
Short Circuit Current Rating (SCCR) 100 kA
Max Working Voltage, IEC (Ui) 1,000 VAC
1,500 VDC
Max Working Voltage, UL (Vin) 1,000 VAC/DC
Number of Tunnel Connections 4
Tunnel Connection Compact Stranded Wire Size (4) 10 – 50 mm²
Tunnel Connection Wire Size - Ferrule (4) 10 – 35 mm²
Tunnel Connection Wire Size (4) #8 – 1/0
Depth (D) 2.6"
Height (H) 8.1"
Width (W) 2.1"
A 4 1/4"
Unit Weight 0.57 lb
Certification Details UL® 1059
Flammability Rating UL® 94V-1
Complies With IEC® 60947-7-1
Design Guideline for Distribution Blocks, Power Blocks and Power Terminals
Derating according to Ambient* Temperature (°F) to maintain working temperature of 185°F
Ambient Temperature (°F) 86° 95° 104° 113° 122° 131° 140° 149° 158° 167°
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
Power terminal connections are interchangeable and can be used as line side or load side connections.

Pentair, CADDY, CADWELD, CRITEC, ERICO, ERIFLEX, ERITECH and LENTON are owned by Pentair or its global affiliates. All other trademarks are the property of their respective owners. Pentair reserves the right to change specifications without prior notice.

CSA, CSA-US and C-CSA-US are registered trademarks of Canadian Standards Association.
IEC is a registered trademark of the International Electrotechnical Commission.
UL, UR, cUL, cUR, cULus and cURus are registered certification marks of UL LLC.





CSA 70044370
CSA C22.2 No. 158
cUR XCFR8.E198301
CSA C22.2 No. 158
UR XCFR2.E198301
ANSI/UL 1059

Instruction Sheets

SBLT250 / SBTT250
413 KB English