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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

  • 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.

Highlights

  • 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

Specifications

BrandSQUARE D
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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