Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
OA1L11 ABB 1NO+1NC Auxiliary Contact
ABB OA1L11 1SCA022555R9870 is a 1NO+1NC simultaneous auxiliary contact with snap-on mounting and IP20 protection for compatible ABB OT16–OT40M switch-disconnectors.
£18.04
Why Choose the ABB OA1L11 Auxiliary Contact?
The ABB OA1L11, order number 1SCA022555R9870, is a 1 normally open + 1 normally closed (1NO+1NC) auxiliary contact designed for compatible ABB low-voltage switch-disconnectors. Part of the ABB 311020-OT/OETL Accessories product group, it provides additional contacts for switch position indication, signalling, control and interlocking circuits.
Designed for compatible ABB OT16–OT40M switch-disconnectors, the OA1L11 operates simultaneously with the main contacts. It uses snap-on mounting directly to the switch and is supplied with a grey protective cover, providing a compact manufacturer-matched solution for adding auxiliary contact functionality.
The OA1L11 provides 1NO+1NC contact configuration, IP20 protection and a compact half-module width. With a conventional free-air thermal current of 16 A and support for conductor cross-sections up to 2 × 2.5 mm², it is suited to professional control and signalling applications within industrial switchboards and machinery panels.
Key Advantages
- Provides 1 normally open + 1 normally closed (1NO+1NC) auxiliary contact.
- Designed for compatible ABB OT16–OT40M switch-disconnectors.
- Simultaneous operation with the switch main contacts.
- Simple snap-on mounting directly to the compatible switch.
- Supplied with a grey protective cover.
- IP20 protection for the assembled auxiliary contact block.
- Compact half-module width supports space-efficient switchboard installations.
- Manufacturer-matched ABB accessory for signalling, control and interlocking applications.
Key Features
- ABB OA1L11 auxiliary contact.
- ABB order number 1SCA022555R9870.
- 1NO+1NC contact configuration.
- Suitable for ABB OT16–OT40M.
- Simultaneous function with the main contacts.
- Snap-on mounting to the switch.
- Includes a grey cover.
- IP20 degree of protection.
- Half-module width.
- 16 A conventional free-air thermal current (Ith).
- Maximum conductor cross-section of 2 × 2.5 mm².
- Contact numbering according to EN 50013.
- Approximate unit weight of 0.04 kg.
Simultaneous Auxiliary Signalling for ABB OT Switches
Auxiliary contacts allow the operating position of a switch-disconnector to be incorporated into external indication, monitoring, control and interlocking circuits. The ABB OA1L11 provides both a normally open and a normally closed contact, giving control-system designers two complementary contact states from a single compact accessory.
Unlike early-break auxiliary contacts, the OA1L11 is designed for simultaneous operation with the main contacts. Its snap-on construction, included grey cover and IP20 protection make it a practical solution for adding position-related signalling to compatible ABB OT16–OT40M switch-disconnectors in industrial electrical assemblies.
Typical Applications
- ABB OT16–OT40M switch-disconnector installations.
- Switch position indication and signalling.
- Electrical control and monitoring circuits.
- Interlocking and permissive circuits.
- Industrial switchboards and distribution panels.
- Machinery isolation and control systems.
- Building and industrial automation interfaces.
- OEM panel building and electrical system integration.
Technical Specifications
| Product group | 311020-OT/OETL Accessories |
|---|---|
| Order code | OA1L11 |
| ABB order number | 1SCA022555R9870 |
| Product type | Auxiliary contact block |
| Contact configuration | 1NO + 1NC |
| Number of contacts | 2 |
| Operation | Simultaneous with main contacts |
| Suitable switches | ABB OT16–OT40M |
| Mounting | Snap-on mounting to switch |
| Protective cover | Grey cover included |
| Degree of protection | IP20 |
| Width | Half module |
| Conventional free-air thermal current (Ith) | 16 A |
| Rated insulation voltage (Ui) | 690 V |
| Maximum conductor cross-section | 2 × 2.5 mm² |
| Contact numbering | EN 50013 |
| Approximate unit weight | 0.04 kg |
Frequently Asked Questions
What is the ABB OA1L11 used for?
The ABB OA1L11 is a 1NO+1NC auxiliary contact used with compatible ABB OT16–OT40M switch-disconnectors for position signalling, control, monitoring and electrical interlocking circuits.
What is the ABB order number for the OA1L11?
The ABB order number for the OA1L11 auxiliary contact is 1SCA022555R9870.
What contacts does the ABB OA1L11 provide?
The OA1L11 provides two auxiliary contacts: 1 normally open (1NO) and 1 normally closed (1NC).
Which ABB switches are compatible with the OA1L11?
The OA1L11 is specified for compatible ABB OT16–OT40M switch-disconnectors and mounts directly to the switch using a snap-on arrangement.
Does the ABB OA1L11 operate simultaneously with the main contacts?
Yes. The OA1L11 is a simultaneous-function auxiliary contact, meaning its auxiliary contacts operate in conjunction with the main contacts of the compatible switch.
ABB Engineered OT/OETL Accessories
ABB OT/OETL accessories are designed to integrate with compatible ABB low-voltage switching equipment, helping panel builders and electrical engineers create dependable, practical and manufacturer-matched control, signalling and power distribution assemblies.
