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Datasheet generated 2026-10-07
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FAZ-B2/2 (278722)

Eaton · Electrical Components · Miniature Circuit Breakers · Ireland · eaton.com
Part Number
278722  ·  HS 8536.30
FAZ-B2/2 (278722)

Eaton 278722 Industry unit breaker 2pol 2A B curve.

Technical Specifications

Manufacturer part number (MPN)278722
EAN / GTIN4015082787226
Sales unitpcs
Package quantity60 pcs
Eaton catalogue number278722
Depth80 mm
Height75.5 mm
Width36 mm
Weight0.226 kg
CompliancesUL CSA09 (with supplementary protector only); RoHS conform
CertificationsCE marking; UL 1077; CSA (Class No. 3215-30); CSA (File No. 204453); UL (File No. E177451); CSA-C22.2 No. 235; IEC/EN 60947-2; UL (Category Control Number QVNU2, QVNU8); North America (UL recognized, CSA certified); IEC/EN 60898; EN45545-2; IEC 61373
Current limiting class3
FeaturesAdditional equipment possible
Special featuresAmbient temperature hint: a 1 °C increase results in a 0.5% linear reduction of current carrying capacity
Used withFAZ; Miniature circuit breaker
Amperage Rating2 A
ApplicationBranch circuits, not as BCPD Switchgear for industrial and advanced commercial applications xEffect - Switchgear for industrial and advanced commercial applications
Number of polesTwo-pole
Number of poles (protected)2
Number of poles (total)2
Release characteristicB
Tripping characteristicB
TypeFAZ Miniature circuit breaker
Ambient operating temperature - max75 °C
Ambient operating temperature - min-25 °C
Equipment heat dissipation, current-dependent2.8 W
Rated operational current for specified heat dissipation (In)2 A
Breaking capacity10 kA (UL1077)
Frequency rating - max60 Hz
Frequency rating - min50 Hz
Operational voltage (IEC/EN 60947-2) - max440 VAC
Overvoltage categoryIII
Pollution degree2
Rated impulse withstand voltage (Uimp)4 kV
Rated insulation voltage (Ui)440 V
Rated operational voltage (Ue) - max400 V
Rated service short-circuit breaking capacity (IEC/EN 60898-1) - Ics7.5 kA
Rated service short-circuit breaking capacity (IEC/EN 60947-2) - Ics7.5 kA
Rated short-circuit breaking capacity (IEC/EN 60898-1) - Icn at 230 V10 kA
Rated short-circuit breaking capacity (IEC/EN 60898-1)- Icn at 400 V10 kA
Rated short-circuit breaking capacity (IEC 60947-2)- Icu at 230 V15 kA
Rated short-circuit breaking capacity (IEC 60947-2)- Icu at 400 V15 kA
Rated switching capacity (IEC/EN 60898-1)10 kA
Rated switching capacity (IEC/EN 60947-2)15 kA
Rated switching capacity (IEC/EN 60947-2) at max voltage rating10 kA
Voltage rating240 V AC / 415 V AC
Voltage rating (IEC/EN 60898-1)415 VAC
Voltage rating (UL CSA 13)480 Y/277 V AC; 96 V DC
Voltage rating (UL)480Y/277 V
Voltage typeAC
Built-in depth70.5 mm
Connectable conductor cross section (multi-wired) - max25 mm²
Connectable conductor cross section (multi-wired) - min1 mm²
Connectable conductor cross section (solid-core) - max25 mm²
Connectable conductor cross section (solid-core) - min1 mm²
Degree of protectionUL/CSA Type: -; IP20 (IEC); IP20
Width in number of modular spacings2
Power loss2.8 W
Number of protected poles2
Rated current2 A
Rated voltage400 V
Rated insulation voltage Ui440 V
Rated impulse withstand voltage Uimp4 kV
Frequency50–60 Hz
Concurrently switching neutral conductorNo
Additional equipment possibleYes
Ambient temperature during operating-25–75 °C
Connectable conductor cross section multi-wired1–25 mm²
Connectable conductor cross section solid-core1–25 mm²
Explosion-proofNo
Flush-mounted installationNo
Country of originRomania

Properties

MOQ1

Cross-References

Attached Documents