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Gray molded case circuit breaker with three poles and I-Line mounting, 5.39 inches tall

SQUARE D

SQUARE D BDA36030 Molded Case Circuit Breaker 30A 3 Pole

SKU CH-K25B-52JVA

A 30 A, three-pole molded-case breaker rated 525 V AC with a 25 kA interrupting rating at 277/408 V AC for industrial panels

  • Product colorGray
  • 30 A rated current protects circuits reliably
  • 25 kA interrupting rating clears heavy faults safely
  • 525 V AC rating suits industrial power systems
  • Thermal-magnetic trip gives fixed instantaneous protection
  • I-Line mounting fits standard distribution panels

BDA36030 circuit breaker for three-phase panels

The SQUARE D BDA36030 is a molded-case circuit breaker rated at 30 A for three-phase AC systems. It mounts on I-Line bus and fits industrial control panels or electrical distribution equipment. The thermal-magnetic trip unit provides standard overcurrent protection with a fixed instantaneous setting. Gray housing and 5.39 in height match the POWERPACT B frame profile.

25 kA interrupting rating at 277/408 V AC

The single specification that decides fit is the maximum AIR of 25 kA at 277/408 V AC. This breaker will safely clear faults up to that level on a 525 V AC system. It is not DC rated, so it cannot protect DC bus sections or battery circuits. Verify the panel’s available fault current before specifying this frame.

Thermal-magnetic trip holds steady under sustained

Under continuous loading the thermal element responds to prolonged overcurrent without nuisance tripping. The fixed instantaneous trip engages only on short-circuit magnitudes up to the 25 kA rating. Mechanical lugs on the OFF end accept aluminum conductors for reliable termination during extended operation.

How it compares

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

Price $585.99
Pricier than about 91% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameSQUARE D
Product colorGray

Questions about this item

What does the 30 A rating mean when the breaker is installed in a panel?

The breaker will carry up to 30 A continuously and trip on overloads or short circuits above that level, protecting the downstream circuit.

How does the 25 kA interrupting rating at 277/408 V AC limit the fault current it can safely clear?

It can safely interrupt short-circuit currents up to 25 kA on systems where the line-to-line voltage does not exceed 408 V AC.

What mounting style and panel space does the I-Line frame require?

It mounts on an I-Line bus and occupies a 125 A frame footprint with a height of 5.39 in.

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