Key Product Data
Model: OTP16A3M
Manufacturer: ABB
Product ID: 1SCA022399R6750
EAN: 6417019130248
Product Type: Enclosed safety switch / switch-disconnector
Poles: 3
Rated Current: 16 A at AC-23, 415 V
Rated Operational Power: 7.5 kW
Enclosure Protection: IP65
Enclosure Material: Glass-fibre-reinforced polycarbonate
Handle: Red-yellow selector handle
Handle Locking: Provision for up to 3 padlocks
Cover: Interlocked, with defeatable interlocking
Mounted Auxiliary Contact: 1 NO
Maximum Auxiliary Contacts: 2 NO + 2 NC
Cable Entries: Top and bottom
Cable Outlets per Side: 2 × M25 + M16
Neutral Terminal: Fixed neutral terminal included
Protective Earth: PE terminal included
Dimensions: 150 × 130 × 60 mm
Approximate Unit Weight: 0.5 kg
Product Introduction
The ABB OTP16A3M is a three-pole enclosed safety switch designed for isolating electrical circuits in industrial installations. Identified by product number 1SCA022399R6750 and EAN 6417019130248, it combines a compact plastic enclosure with a red-yellow selector handle for clear local ON/OFF operation.
Its 16 A AC-23 rating and 7.5 kW operating-power rating make it suitable for specified motor-switching and isolation duties. The enclosure is made from rigid, glass-fibre-reinforced polycarbonate and carries an IP65 rating, supporting installation in environments where protection against dust ingress and water jets is required.
For maintenance teams, the product's value lies in combining the switching mechanism, enclosure, operating handle and interlocked cover in one assembly. It can be installed near machinery or other equipment where a local isolation point is needed, provided the electrical ratings and installation requirements match the application.
Isolation Features and Enclosure Design
OTP16A3M includes a red-yellow selector handle and a cover interlock. The handle can be padlocked, with provision for up to three padlocks, helping support site lockout procedures during maintenance. The cover interlocking mechanism can be defeated for specific inspection tasks where permitted by the applicable procedures and installation instructions.
The enclosure is UV-protected and intended for indoor or outdoor use within its specified environmental limits. Cable-entry openings are provided at both the top and bottom, with threaded knockout arrangements for power and control cables. Compression cable glands may need to be sourced separately, depending on the installation.
The switch includes a fixed neutral terminal and a protective-earth terminal for the documented five-wire system arrangement. Confirm the actual wiring requirements and local electrical code before installation.
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Electrical Ratings and Auxiliary Contact Details
The key rating for motor-switching selection is 16 A at AC-23, 415 V, with a stated operating power of 7.5 kW. The switching duty, supply voltage, motor characteristics and applicable installation rules must all be considered when selecting the device. The 16 A rating should not be treated as a universal current rating for every load category.
One normally open auxiliary contact is supplied as standard. ABB documentation lists the maximum auxiliary-contact arrangement as 2 NO + 2 NC, allowing additional signalling contacts where supported by the applicable configuration. These contacts are auxiliary signalling elements, not substitutes for the main power contacts.
The OTP16A3M is an isolation and switching device. It should not be described as an emergency-stop pushbutton or as a complete safety-control system. Where a machine requires an emergency-stop function, that function must be implemented using appropriately selected and designed safety components.
Replacement Identification for MRO Purchasing
When ordering a replacement, use the full reference 1SCA022399R6750 together with model OTP16A3M. The EAN, 6417019130248, is useful for inventory matching and purchasing records.
Before replacing an installed unit, check the following:
- Three-pole configuration and the required AC-23 switching rating.
- Enclosure size, mounting arrangement and cable-entry positions.
- Red-yellow selector handle and padlocking requirements.
- Auxiliary-contact configuration.
- Neutral and PE terminal arrangement.
- IP65 enclosure requirement and the environmental conditions at the installation site.
Do not select a similar-looking OTP-series switch solely by its nominal current. Variants may differ in handle arrangement, cable-entry configuration, auxiliary contacts or other construction details.
Frequently Asked Questions
What is the ABB OTP16A3M used for?
It is an enclosed three-pole safety switch used for local circuit isolation and switching in compatible industrial installations, including specified motor-load applications.
What does the 16 A rating mean?
The manufacturer specifies 16 A for AC-23 operation at 415 V. The suitability of the switch depends on the actual load category and operating conditions.
Can the handle be locked during maintenance?
Yes. The red-yellow selector handle is padlockable and has provision for up to three padlocks, supporting applicable site lockout procedures.
Is the OTP16A3M suitable for outdoor installation?
Its UV-protected enclosure and IP65 rating support indoor and outdoor applications within the product's specified environmental limits. Correct cable-entry sealing and installation are essential.
Does it include auxiliary contacts?
Yes. One normally open auxiliary contact is listed as standard, and ABB documentation specifies a maximum configuration of 2 NO + 2 NC.
Is this an emergency-stop switch?
No. It is an enclosed isolation and switching device, not an emergency-stop pushbutton. Any required emergency-stop function must be provided by a suitable safety system.
Procurement Reference
ABB OTP16A3M Safety Switch - 1SCA022399R6750, EAN 6417019130248. A three-pole, 16 A enclosed switch with IP65 protection, a red-yellow padlockable handle, an interlocked cover and one standard normally open auxiliary contact. Confirm the required load rating, enclosure configuration and auxiliary-contact arrangement before ordering.
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