Fieldpiece SC440 True RMS Clamp Meter | Inrush | Backlit | HVAC/R | 400A

Fieldpiece SC440 True RMS Clamp Meter — Inrush Current | Backlit | HVAC/R | 400A AC

The Fieldpiece SC440 is a mid-size True RMS clamp meter designed for HVAC/R field service professionals who need virtually every electrical and thermal parameter in a single instrument. It adds inrush current measurement and a backlit LCD to the SC420 feature set — making it suited to technicians who need to capture compressor and motor start-up current spikes, and who work in poorly lit plant rooms and ceiling spaces.

Auto and manual ranging, dual display, detachable leads with alligator probe tips, and a magnetic strap for hands-free use. Safety features include a high-voltage LED and beeper, continuity warning, and push-button NCV.

Electrical testing on live systems requires appropriate trade qualifications and licensing. Confirm licensing and compliance requirements with the relevant authority in your state or territory. Confirm all specifications against the Fieldpiece SC440 datasheet.

Key Features

• True RMS measurement — accurate on VFDs and non-sinusoidal waveforms
• Auto and manual ranging
• Inrush current measurement — captures compressor and motor start-up current spikes
• Dual display — view two measurements simultaneously
• Backlit LCD for use in poorly lit locations
• 400A AC clamp measurement
• AC and DC voltage
• Microamps DC for flame rectification testing
• Temperature — °F and °C
• Capacitance
• Duty cycle %
• Frequency via leads and clamp
• Non-contact voltage (NCV)
• 50 megaohm resistance with 0.1 resolution
• Continuity beeper
• Diode test
• Hold and MAX hold
• Clamp probe holder
• Magnetic strap for hands-free use
• High-voltage LED and beeper safety warning
• Low battery indicator

SC420 vs SC440 — Which Fieldpiece Clamp Meter?

• SC420 ($298.95): True RMS, dual display, 400A AC, microamps DC, temp, capacitance, duty cycle, NCV. No inrush current or backlit display.
• SC440 ($459.99): Adds inrush current measurement and backlit LCD. Best for technicians who need to capture start-up current spikes and work in poorly lit locations.

Check Before Ordering

• Electrical testing on live systems requires appropriate trade qualifications — confirm licensing requirements in your state or territory
• Confirm all specifications against the Fieldpiece SC440 datasheet for your application
• Confirm warranty terms with HVAC Trade Supply at time of purchase

Frequently Asked Questions

What is inrush current measurement?

Inrush current is the high current drawn by a motor or compressor during start-up — typically several times the running current. The SC440 captures this peak current, which is useful for diagnosing hard-starting compressors and sizing protection devices.

What is the warranty?

Confirm current warranty terms with HVAC Trade Supply at time of purchase.

Browse our full Fieldpiece test and measurement range or contact our team for advice.