What is the rated load current of the AR2-PK?

(ns-faq-ar-16018-spec)

There is no load current rating. With this model no load current flows because it is connected in parallel to the load.

Are there any 100 VAC contact surge arresters?

(ns-faq-ar-16016-select)

The “AR-PS” is available. Note that this is not JIS-compliant.

Do I need surge arresters on dry contacts (no-voltage contact)?

(ns-faq-ar-16013-select)

Yes, you need it regardless of the presence or absence of voltage. We recommend the AR-LP.

What are the AR series insulation resistance and withstand voltage values?

(ns-faq-ar-16017-spec)

The insulation resistance value at the surge arrester terminal block between the I/O terminals and ground is 100 MΩ or more/500 VDC. The withstand voltage between I/O terminals and ground is 1000 VAC/1 minute (or 1500/1 minute for the AR-PH onl...

Can I buy a terminal cover for the arrester?

(ns-faq-ar-16019-other)

Yes. It's the E9731TW. (Please consult with your dealer at the time of purchase.)

I’m purchasing an AR-PS, but are sockets included?

(ns-faq-ar-16021-spec)

Yes. The adapter for mounting on a DIN rail is an option.

Are the AR-SA and AR-PS surge protectors?

(ns-faq-ar-16020-spec)

They are voltage limiting lightning arresters.

For converters that have an open detection function (DC0, FC0A, WC0A, HC0, EC0, and CC), why do you recommend the AR-HA and not the AR-SA?

(ns-faq-ar-16012-select)

For converters with an open detection function, during open detection the line-to-line is 40 V, therefore we recommend using the AR-HA (max. continuous line-to-line voltage of 70 V) .

Can the surge arresters touch each other when installed?

(ns-faq-ar-16009-connect)

Yes, that is not a problem.

Are there any surge arresters that support HART communication?

(ns-faq-ar-16003-select)

Yes, the AR-SA.

Are there surge arresters for the 24 VDC power supply?

(ns-faq-ar-16001-select)

Yes, the AR-LP. It has a rated (load) current of 2 A. Note that this does not support JIS.

Can I mount on DIN rails?

(ns-faq-ar-16004-select)

A DIN rail adapter can be included with an option when purchasing the surge arrester. If you need to purchase an adapter later, select the AR8-01_DIN rail adapter. ...

Can I use the AR-RT for the Pt50 Ω RTD?

(ns-faq-ar-16005-select)

Yes.

Are there surge arresters for a AC24V power supply?

(ns-faq-ar-16007-select)

You can use the AR-LP. Note that this is not JIS-compliant.

What is the surge absorption element described for the AR-SA?

(ns-faq-ar-16006-spec)

It uses a zinc oxide varistor.

Are there non-voltage contact surge arresters?

(ns-faq-ar-16011-select)

Yes, the AR-LP (for 2-wire pulse signals, 50 VDC or less)

AR2-E2 (DISCONTINUED)

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