We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Clear non-metallic surge protector enclosure with two wires and ground visible

SUPCO

SUPCO 1 Phase Surge Protection Device 120/240VAC LBK10 hvac control

SKU CH-V9N8-EA6ZS

Single-phase surge protector rated for 120/240 V AC with 10 kA nominal discharge current and NEMA 4X enclosure

  • Product colorClear
  • Protects equipment from surges with 10 kA nominal discharge current
  • Handles both 120V and 240V AC single-phase systems
  • Voltage protection ratings of 600V and 900V limit transient damage
  • NEMA 4X nonmetallic enclosure resists harsh outdoor environments
  • Parallel connection with two wires plus ground simplifies installation

Single-phase surge protector for HVAC equipment

The Supco LBK10 is a single-phase surge protection device rated for 120/240 V AC systems. It is designed to protect heating, ventilation and air-conditioning units from transient over-voltages. Installers and facility managers use it to guard compressors, control boards and other sensitive components.

NEMA 4X surface-mount enclosure with parallel wiring

A non-metallic NEMA 4X enclosure allows external surface mounting in damp or outdoor locations. The unit connects in parallel using two wires plus ground, so it does not interrupt the supply conductors during installation. Protection modes cover line-to-ground, line-to-neutral, neutral-to-ground and line-to-line paths.

Factory-set voltage ratings define the protection

Voltage protection ratings are fixed at 600 V for L-G, L-N and N-G and 900 V for L-L, while the maximum continuous operating voltage is 150/300 V AC. Nominal discharge current is 10 kA. No filtering or modular cartridges are included, so the device serves purely as a hard-wired surge barrier.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $95.99
Pricier than about 67% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameSupco
Product colorClear

Questions about this item

What does the 10 kA nominal discharge current rating mean for real-world surge handling?

The 10 kA rating indicates the peak surge current the device can safely divert during a single event without degradation, suitable for standard residential or light commercial panels.

What clearance and mounting surface does the NEMA 4X enclosure require for external installation?

The NEMA 4X non-metallic enclosure is surface-mounted and rated for wet, dusty or corrosive locations; allow enough flat area for the unit body and conduit entries.

How do I wire the two conductors plus ground in parallel, and which mistake trips the breaker?

Connect each line conductor to its terminal and the ground to the grounding point; reversing line and load conductors is the common error that causes nuisance tripping.

More in Heating & Cooling Controllers

Similar items