A16-2S

What type of component is this?

This is a modular switch unit from Omron’s A16 range. It provides DPDT switching and uses screwless clamp terminals for quick, secure field wiring.

What contact configuration does this switch unit provide?

The A16-2S has a DPDT contact configuration, providing two electrically separate changeover contact sets. Each set includes common, normally open and normally closed connections.

What type of terminals are fitted?

It uses screwless clamp terminals, also described as quick-connect terminals. This design allows conductors to be connected without conventional terminal screws.

What electrical loads can the contacts handle?

For resistive loads, the contacts are rated at 5 A at 125 VAC, 3 A at 250 VAC and 3 A at 30 VDC. The connected load and operating conditions should always be checked against the machine’s electrical requirements.

Can it be used for low-current signals?

Yes. The contacts are suitable for both standard loads and microloads, with a minimum applicable load of 1 mA at 5 VDC. Contacts previously used with a standard load may not remain reliable for subsequent microload switching.

Is this a complete pushbutton assembly?

No. It is the switch unit used within the modular A16 control-device system. A compatible operating unit and housing are required to create a complete panel-mounted pushbutton or selector assembly.

Which control devices can use this switch unit?

The unit is used with compatible two-position products in the Omron A16 family, including pushbutton and knob-type selector configurations. Compatibility should be verified using the full model details of the existing assembly.

Does the unit include an indicator lamp?

No lamp is included with this non-illuminated switch unit. The A16-2S may form part of compatible modular arrangements, but any required illumination components must match the selected operator and electrical rating.

What mounting aperture is associated with the A16 range?

Compatible A16 panel operators are designed for a 16 mm diameter mounting aperture, typically specified as 16 mm with a +0.2 mm tolerance. The complete assembly and panel layout should be checked before installation.

What panel thickness is normally recommended?

For compatible A16 assemblies, the recommended mounting panel thickness is generally 0.5 to 3.2 mm. When certain guards or covers are fitted, the permitted thickness may be reduced to 0.5 to 2 mm.

What wire sizes can be connected to the screwless terminals?

Omron recommends 0.5 mm² stranded wire or 0.8 mm diameter solid wire. Usable conductor sizes include stranded wire from 0.3 to 1.25 mm² and solid wire from 0.5 to 1.0 mm diameter, subject to the specified termination requirements.

How much insulation should be stripped from each conductor?

The specified exposed conductor length is 10 ±1 mm. Correct strip length helps the screwless clamp retain the conductor securely while limiting exposed copper.

What is the operating temperature range?

The specified ambient operating temperature range is -10°C to 55°C, with no icing or condensation. The storage range is -25°C to 65°C.

What operating humidity is permitted?

The specified ambient operating humidity range is 35% to 85% relative humidity. Condensation should be prevented within the enclosure.

What is the expected electrical endurance?

The A16 range is specified for at least 100,000 electrical operations under the manufacturer’s stated test conditions. Actual endurance varies with load type, current, voltage and switching frequency.

What is the maximum electrical operating frequency?

The maximum specified electrical operating frequency is 20 operations per minute. This figure is based on defined resistive-load and test conditions.

Does the switch unit itself determine the front-panel protection rating?

No. The front-panel protection level depends on the compatible operator, housing, sealing components and installation method used with the switch unit. The complete assembly must therefore be assessed rather than the switch block alone.

What should be checked when selecting a replacement?

Confirm the DPDT contact arrangement, screwless terminal style, two-position operating configuration, panel operator compatibility, electrical ratings, conductor size and available depth behind the panel. Matching only the external appearance is not sufficient.