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Help CenterABB 5SHX0845F0001 / 5SXE05-0151 — MCCB With Electronic Trip Unit for LV Distribution & Motor Protection
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This listing refers to the ABB 5SHX0845F0001 molded-case circuit breaker (MCCB) combined with the 5SXE05-0151 electronic trip/release. It appears to be a compact, panel-mount breaker typically used for feeder and motor protection in low-voltage switchboards. From my experience, the pairing gives you conventional thermal-magnetic protection with the option to add adjustable electronic protection functions when the 5SXE05-0151 is fitted.
The 5SHX0845F0001 looks to be rated around 45 A (model code suggests 45A frame) and is intended for standard LV distribution duties — short-circuit interruption, overload protection and selective coordination with downstream devices. The 5SXE05-0151 electronic trip unit adds adjustable trip curves and more precise protection settings, which is useful in mixed load environments or where selective coordination and nuisance-trip reduction are required.
Key features45 A nominal frame (model indicates): Suitable for small feeders and motor circuits; conservative sizing typically ensures coordination with downstream protection.
Molded-case construction: Robust, compact design for switchboards and distribution panels; typically bolt-on for panel mounting.
Optional electronic trip unit (5SXE05-0151): Provides adjustable thermal and magnetic settings, enabling better selectivity and reduced nuisance trips in many cases.
Thermal-magnetic baseline protection: Reliable, proven protection principle for overloads and short circuits without external power.
Accessory compatibility: Accepts auxiliaries (alarms, shunt trips, auxiliary contacts) in most configurations — helpful when integrating with PLCs or remote monitoring systems.
Field serviceability: Replaceable trip units and accessories typically reduce downtime and spare-parts inventory costs.
| Brand / Model | ABB — 5SHX0845F0001 with 5SXE05-0151 trip unit |
| Function | Molded-case circuit breaker with optional electronic trip/release |
| Rated current | ~45 A (model code indicates 45A nominal rating — verify on nameplate) |
| Rated voltage | Typical LV up to 400–690 VAC (common for MCCBs) — confirm with datasheet |
| Power / auxiliary | Thermal-magnetic operation requires no external power; electronic trip unit may require an auxiliary supply — check datasheet. |
| Installation method | Panel / switchboard mounting (bolt-on frame) — specific mounting depends on frame and accessory kit |
| Operating temp. | Typical industrial range (approx. -25°C to +60°C) — verify manufacturer spec for exact limits |
This combination is commonly used in low-voltage distribution boards, machine control panels, motor feeders, UPS/generator inputs, and building services. One practical use case I see often is motor feeder protection where the electronic trip reduces nuisance trips during inrush, while the base MCCB handles fault interruption reliably.
Reliable, familiar technology: Thermal-magnetic breakers are straightforward to spec and maintain; technicians typically know how to size and test them.
Modular protection options: Adding the 5SXE05-0151 trip unit gives you adjustable protection without replacing the entire breaker, which often saves lifecycle costs.
Compatibility: Appears to be compatible with standard ABB accessories and retrofit kits, reducing lead time for spares and upgrades.
Procurement perspective: Buying a known-brand MCCB with optional trip unit typically improves serviceability and resale value of switchgear assets.
Typical installation requires a well-ventilated switchboard cabinet (IP20–IP54 per application), secure bolting for the MCCB frame, and proper torqueing of cable lugs. You might notice that tight connector screws and correct conductor sizing greatly reduce heating issues in the field.
Wiring: Use appropriately rated lugs, follow torque values on nameplate or datasheet, and keep neutral/PE routing tidy to avoid inadvertent loops.
Safety: De-energize circuits before working; verify absence of voltage and use PPE. Fit clear labeling on panel doors for quicker isolation.
Routine maintenance: Periodic cleaning (dust removal), contact inspection and functional trip tests annually or per site policy. If fitted, check electronic trip firmware/configuration during scheduled shutdowns.
Spare parts: Keep at least one replacement trip unit or a spare breaker frame for critical feeders — in many cases this shortens downtime significantly.
ABB low-voltage products typically comply with IEC standards (e.g., IEC 60947-2), carry CE marking for EU markets and often have UL/CSA listings depending on the configuration. RoHS compliance and ISO-managed manufacturing are commonly in place. Warranty is the manufacturer's standard policy (typically in the 12–24 month range depending on region and reseller) — please request the specific warranty statement with your purchase order.
If you need exact electrical parameters (breaking capacity, precise auxiliary supply for the 5SXE05-0151, mounting kit part numbers or compatibility with busbars), I recommend checking the ABB product datasheet or I/O matrix. From my experience, verifying the nameplate and the electronic trip configuration before procurement avoids surprises on site.
Sample customer feedback (simulated): "Swapped in the electronic trip and reduced nuisance trips on our pump line — installation was straightforward and documentation matched the product." This seems to be a common outcome where adjustable trips are applied.
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