The Klein Tools CL330 is a 400A AC True RMS auto-ranging clamp meter with a 1.12-inch jaw opening and dual-line OLED display for high visibility. It measures AC/DC voltage, AC current, resistance, capacitance, frequency, and temperature via K-type thermocouple, and also performs diode and continuity tests. Rated CAT III 600V with Class 2 double insulation and 3.3-foot drop protection. Suitable for electricians and HVAC technicians. The CL330 is no longer in production. Backed by Klein Tools' 1-year limited warranty.
Is the CL330 still available?
No — the CL330 has been discontinued. The CL490 is its current equivalent.
What was the CL330 known for?
The CL330 was a 400A True RMS clamp meter with dual display and temperature measurement — a combination suited for HVAC technicians who need to monitor current and temperature simultaneously.
What replaced the CL330?
The CL490 shares the same dual-display and temperature concept, and adds 400A DC current measurement. It is the direct current-generation replacement.
# Klein Tools® CL330 400A AC Auto-Ranging Digital Clamp Meter **Model:** `CL330` **Brand:** Klein Tools **Category:** Clamp Meter > The Klein Tools CL330 is a 400A AC True RMS auto-ranging clamp meter with a 1.12-inch jaw opening and dual-line OLED display for high visibility. It measures AC/DC voltage, AC current, resistance, capacitance, frequency, and temperature via K-type thermocouple, and also performs diode and continuity tests. Rated CAT III 600V with Class 2 double insulation and 3.3-foot drop protection. Suitable for electricians and HVAC technicians. The CL330 is no longer in production. Backed by Klein Tools' 1-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Digital Clamp Meter | | Form Factor | hook | | Ac Amp Capacity | 400 | | True Rms | Yes | | Auto Ranging | Yes | | Temperature Measurement | Yes | | Low Impedance Loz | No | | Worklight | No | | Flexible Clamp | No | | Dual Display | Yes | | Jaw Opening In | 1.12 | | Voltage Range Ac | 600V AC | | Voltage Range Dc | 600V DC | | Cat Rating | CAT III 600V | | Battery Type | 3 × AAA | | Overall Length In | 8.7 | | Warranty | 1-year limited | ## What's Included - Test leads (41 inches) - K-type thermocouple - 3 × AAA batteries - Protective carrying case Source: https://www.jaspecs.com/klein-tools/clamp-meter/cl330-klein-tools-400a-ac-auto-ranging-digital-clamp-meter/