Product Short Description
Manufacturer: ABB
Product Overview:
The ABB ACA 4,2525,5 ΜF3 (3BHB020695R0010) is a front-mounted auxiliary contact block designed for use with ABB molded case circuit breakers (MCCBs), specifically the Tmax T4, T5, T6, and T7 series. It provides signal feedback (open/close status) for remote monitoring and control systems.
Description
Technical Specifications:
| Parameter | Value |
|---|---|
| Model Designation | ACA 4,2525,5 ΜF3 |
| ABB Catalog No. | 3BHB020695R0010 |
| Contact Configuration | 4 NO + 4 NC (4 Normally Open + 4 Normally Closed) |
| Rated Operational Current (Ie) | 6 A (AC-15) |
| Rated Insulation Voltage (Ui) | 690 V AC |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Mechanical Life | 10,000,000 operations |
| Electrical Life | 300,000 operations (at rated load) |
| Mounting | Front-mounted on MCCB (clip-on) |
| Compatible Breakers | Tmax T4 (250A), T5 (630A), T6 (800A), T7 (1000–1600A) |
| Standards | IEC 60947-1, IEC 60947-2, IEC 60947-5-1 |
| Certifications | CE, UL, CSA, CCC |
Material Composition:
| Component | Material |
|---|---|
| Housing | Polyamide 6.6 (PA66) — Flame retardant, UL94 V-0 |
| Contact Material | Silver Alloy (AgSnO2) |
| Terminals | Copper alloy, tin-plated |
Structural Features:
- Front-clip mounting — snaps onto MCCB front panel without tools
- Screw terminal connections — 2.5 mm² to 4 mm² wire capacity
- Clear contact status indicator — mechanical flag visible from front
- Compact modular design
Functional Characteristics:
- Provides 8 auxiliary contacts total (4 NO + 4 NC) for comprehensive status signaling
- Mirror contact operation — contacts change state simultaneously with breaker pole movement
- Suitable for remote alarm, interlock, and PLC input applications
- Pre-wiring capability — terminals accessible before mounting
Applicable Industries:
- Electrical Power Distribution
- Industrial Motor Control
- Building Management Systems (BMS)
- Switchgear Panels
Installation Notes:
- Clip onto front of Tmax MCCB — ensure full engagement
- Wire to control circuit (max 6 A per contact)
- Verify contact rating matches control circuit voltage/current
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