MS325-2.5 starter selection: current setting, coordination and replacement checks
ABB MS325-2.5 is a compact manual motor starter identified by a 2.5 A current-setting designation. For ABB MS325-2.5, the selected current must match the motor nameplate and the required coordination scheme; do not treat the dial value as a motor-power rating. ABB's lifecycle notice identifies the MS325 range as obsolete from July 2025, so check current stock, service support and the approved replacement path before specifying it.
Key technical data
| Technical item | Verified value / selection note |
|---|---|
| Representative model | MS325-2.5 |
| Device type | Manual motor starter / motor-protection circuit breaker |
| Setting range | 2.5 A model designation; verify nameplate tolerance and actual setting |
| Protection functions | Manual switching with motor overload and short-circuit protection, subject to exact variant |
| Maximum voltage | Up to 600 V AC family rating in ABB UL/CSA data; confirm standard and local approval |
| Lifecycle | ABB announced MS325 as obsolete from July 2025; confirm service and successor availability |
Identification note: MS325-2.5. The figures above are selection references; verify the actual label, duty rating, approvals, firmware and options for the exact unit before purchase or engineering release.
MS325-2.5 must be matched to the actual duty and interface; confirm the nameplate before ordering.
Selection gates
This MS325-2.5 configuration is relevant where a local manual disconnecting and motor-protection function is required. A contactor may still be needed for remote switching, interlocking or frequent automated operation. When evaluating ABB MS325-2.5, distinguish its role from a variable-speed drive and from a standalone overload relay; each device serves a different control and protection function.
Confirm the exact motor full-load current, starting duty, prospective fault current, upstream protective device and starter/contactor coordination. ABB MS325-2.5 must be assessed against the applicable UL/CSA or IEC installation basis, not by ampere value alone. Because this family is lifecycle-limited, document the proposed successor and verify accessory and panel compatibility instead of assuming MS116 or MS132 is a drop-in replacement.
For procurement, quote the complete designation MS325-2.5 and state the required quantity, destination, duty and delivery window.
Related model references
The following model references belong to the same identifiable family as MS325-2.5; they are configuration alternatives, not automatic substitutes. Compare each complete designation and application before selecting.
- 1SAM150000R1007 MS325-2.5
- 1SAM150000R1008 MS325-4
- 1SAM150000R1009 MS325-6.3
- MS325- 25
- MS325-16
- MS325-20
- MS325-6.3 (1SAM150000R1009)
- MS325-9
- MS325-HK11
- MS325?690V
For the MS325-2.5 record, retain the full type string and do not infer range, rating or compatibility from a shortened family code.
Commissioning handoff
Install ABB MS325-2.5 only with the circuit isolated and absence of voltage proven. Set the trip value to the approved motor current, check conductor sizing and tightening torque against the matching instruction, then test manual operation, trip/reset and downstream interlocks. Record the existing panel cut-out, busbar and accessory arrangement before a replacement quotation.
Acceptance check: verify the functional response and diagnostics for MS325-2.5 against the approved schematic, control narrative and current ABB instructions. Record test results, final settings and any deviation before handover.
The correct choice for MS325-2.5 depends on the full nameplate, connected equipment and site conditions, not the family name alone.
