NOARK · UL 1449 Type 4CA Surge Protective Device, 40kA
Product overview
Original NOARK U4 UL 1449 Type 4CA surge protective component assemblies with 40kA maximum discharge current. Select pole configuration, MCOV and remote signal contact.
Technical selection summary
| Manufacturer / series | Original NOARK U4 |
|---|---|
| Standards / application type | UL 1449; CSA C22.2 No.269.5-17; Type 4CA component assembly |
| MCOV | 175, 320, 440, 550 or 660Vac L-N; N-PE: 255V |
| Maximum discharge current Imax | 40kA (8/20μs) |
| Nominal discharge current In | 20kA (8/20μs) |
| Pole configurations | 1P, 1P+N, 2P, 2P+N, 3P, 3P+N or 4P |
| Status / remote signal | Green OK / red fault; optional dry signal contact |
| Mounting / enclosure | DIN rail; IP20 component; thermoplastic UL94 V-0 |
Select MCOV and protection mode for the actual earthing and voltage system; MCOV is not the nominal system voltage. Type 4CA is a component-assembly classification, not a complete standalone Type 1/2 installation approval. Replacement cartridges are ordered separately.
Typical applications
- Surge protection within suitably designed low-voltage power distribution equipment.
- DIN-rail assemblies requiring replaceable surge cartridges and optional remote status indication.
Specify your enquiry
For a focused quotation, include:
- Selected model, poles, current and all applicable configuration options.
- Actual system voltage, frequency, protection duty and required accessories.
- Quantity, installation conditions, destination and required product documentation.
Download NOARK U4 catalogue (PDF)
Product reference images and drawings
