What are CAT (Category) Safety Ratings in Multimeters? - Another Teaching Moment | DigiKey
Category Safety Ratings, or CAT ratings for short, are used to determine the correct multimeter required when measuring electrical equipment in specific situations or configurations. If you’ve ever used a multimeter or examined a datasheet for one, you’ve likely noticed a CAT safety rating. According to the IEC (International Electrotechnical Commission), multimeter manufacturers must follow specific safety testing guidelines to ensure each manufactured device meets or exceeds its stated rating. This video demonstrates the four, load type CAT level designations designed to protect end users from unintentional contact with electric energy which may result in serious injury or death.
Part List
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
 |  | 480-001 | DGTL MULTIMETER PRO DMM | 0 - Immediate | View Details for Pricing | View Details |
|  | 1359 | SMD COMPONENT TESTING TWEEZERS | 0 - Immediate | $39.38 | View Details |
|  | 10829 | SMART SMD TESTER | 0 - Immediate | $47.50 | View Details |
|  | MM750W | DATALOGGING CAT IV TRMS DMM | 0 - Immediate | $163.89 | View Details |
|  | MM300 | DIGITAL MULTIMETER, MANUAL-RANGI | 0 - Immediate | $36.95 | View Details |
|  | MM400 | DIGITAL MULTIMETER, AUTO-RANGING | 0 - Immediate | $61.43 | View Details |
|  | MM600 | DIGITAL MULTIMETER, AUTO-RANGING | 0 - Immediate | $83.29 | View Details |
|  | MM700 | DIGITAL MULTIMETER, AUTO-RANGING | 0 - Immediate | $112.91 | View Details |
|  | ET900 | USB DIGITAL METER- TYPE A | 0 - Immediate | $17.99 | View Details |
|  | ET910 | USB DIGITAL METER & TESTER- TYPE | 0 - Immediate | View Details for Pricing | View Details |
|  | ET920 | USB DIGITAL METER - TYPE A AND C | 0 - Immediate | $49.97 | View Details |
|  | SDM3045X | DMM 4.5DIGIT MULTIFUNCTION 120V | 0 | View Details for Pricing | View Details |
|  | SDM3055 | 12CH 5.5 DIGIT 4.3" LCD SCRE | 0 | $574.00 | View Details |
|  | SDM3065X | 12CH MUX 6.5 DIGIT LCD SCREEN | 0 | $857.00 | View Details |
| | SDM3065X-SC | 12CH DMM MUX 5.5 DIGIT 6.5" LCD | 0 | View Details for Pricing | View Details |
|  | DM3058E | DMM 5.5 DIGIT BENCHTOP USB RS-23 | 0 | View Details for Pricing | View Details |
