Klein Tools CL490
#4 in AC/DCFull review
The CL390’s AC/DC measurements with an extra bottom display, for electricians who often read a meter at an awkward angle.
Amazon $101.66$101.66
400 A400 ACAT III 600 V
3.5/5
An accurate AC/DC clamp for motor and drive maintenance, priced above rivals with similar features.
- 600 AAC current
- 600 ADC current
- CAT III 600 VSafety
- 35 mmJaw
Check price at Amazon$243.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Tight 1.8% current accuracy
- Inrush and a low-pass filter for motor and drive work
- Reads AC and DC current to 600 A
Cons
- Rated CAT III 600 V, not CAT IV
- No temperature input
- No published warranty
How it scores
The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | AMP-220 (4560543) |
|---|---|
| Measurement | |
| AC current (jaw) | 600 A |
| DC current (jaw) | 600 A |
| Current accuracy | 1.8% of reading |
| Jaw opening | 35 mm |
| Safety | |
| CAT rating | CAT III 600 V |
| Features | |
| True RMS | Yes |
| Inrush | Yes |
| LoZ mode | No |
| Non-contact voltage | Yes |
| Low-pass filter | Yes |
| Temperature | No |
| Phone app | No |
Alternatives in this type
Fluke 325
#5 in AC/DCFull review
A compact true-RMS AC/DC Fluke clamp for electricians who want the name and two-year warranty, though rivals offer more for less.
Amazon $298.49$298.49
400 A400 ACAT IV 300 V / CAT III 600 V
UNI-T UT216C
#7 in AC/DCFull review
A feature-packed 600 A AC/DC clamp for HVAC and electrical work at a mid-range price.
Amazon $114.29$114.29
600 A600 ACAT III 600 V / CAT II 1,000 V
Compare
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