Tektronix A621 AC Current Probe

The Tektronix A621 rental Vietnam service from Lost in HCM gives engineering teams in Vietnam short-term access to this current probe, with sale and service options on request.

Tektronix A621 rental Vietnam overview

The Tektronix A621 rental Vietnam lets an oscilloscope show current as a clear waveform. So engineers can see inrush, ripple, switching edges, and fault pulses on screen. In addition, they can view current and voltage together on one timebase and link cause to effect.

This family covers Tektronix clamp probes, Rogowski loops, IsoVu isolated probes, and wideband current shunts. First, AC-only probes and current transformers capture fast pulses. Next, AC/DC probes add DC and slow changes. Finally, shunts pair with isolated probes for very fast switching work.

Tektronix A621 rental Vietnam: about the A621

Tektronix A621 rental Vietnam: tektronix A621 overview

The Tektronix A621 is a AC-only clamp current probe covering 5 Hz to 50 kHz, with 2000 A peak current capability under the manufacturer’s stated conditions.

Tektronix A621 rental Vietnam: product images

Tektronix A621 rental Vietnam: specifications

Manufacturer	Tektronix
Model	A621
Product type	AC current probe
Frequency range / bandwidth	5 Hz to 50 kHz
Current capability	2000 A peak
Connection / system requirement	BNC
Output sensitivity	1, 10 or 100 mV/A
Maximum conductor diameter	54 mm
Maximum bare-wire voltage	600 V CAT III
Measurement mode	AC only

Confirm frequency derating, pulse limits, conductor voltage and required accessories in the current manufacturer manual before use.

Tektronix A621 rental Vietnam: measurement applications

Clamp around one conductor to inspect its current waveform without opening the circuit. Select the output sensitivity and oscilloscope scaling for the expected current. Current capability, voltage category and bandwidth are separate limits and must all suit the application. Teams in Vietnam often choose Tektronix A621 rental for this reason.

Connection schematic

Single insulated DUT conductor → A621 clamp
Probe BNC output → compatible oscilloscope input
Oscilloscope scaling → match selected probe sensitivity

Illustrative connection diagram, not an internal service circuit. De-energize the circuit before installation where required. Follow the stated voltage category, conductor insulation and current limits. Clamp around one conductor; enclosing both supply and return may cancel their magnetic fields.

Setup and compatibility

Confirm the exact oscilloscope input, termination, adapter and amplifier requirements. Degauss and zero active AC/DC systems when the manual requires it. A peak or pulse rating is not a continuous-current rating.

Request a quotation in Vietnam

Request a quotation for Tektronix A621. Include the oscilloscope model, expected current, waveform frequency, conductor size and required accessories. Price, condition and local availability are confirmed individually.

Manufacturer references

Official Tektronix datasheet. Reviewed 19 October 2026.

How the current probe works

An AC current probe works like a small transformer around the conductor. The changing magnetic field induces a signal in the probe core. Therefore, these probes read AC and pulse current well, but they cannot see DC or very slow changes. This applies to every Tektronix A621 rental we arrange in Vietnam.

AC/DC probes add a Hall-effect sensor inside the core to track DC and low frequencies. Meanwhile, the transformer part handles the fast edges. As a result, one clamp covers DC to many megahertz, though it needs power from the scope, an adapter, or an amplifier.

What to look for in a current probe

Before you rent or buy, list the peak current, the fastest edge, and the conductor size. Then check whether you need DC. The features below explain what to compare, from bandwidth and range to interface, isolation, and safety ratings.

• AC only or AC and DC. AC-only probes and Rogowski loops skip DC, so they suit pulses and ripple. However, AC/DC models such as the TCP0030A and TCP303 also show DC offset, inrush, and slow load changes. So, plan it early when you book a Tektronix A621 rental in Vietnam.
• Bandwidth and rise time. Bandwidth sets the fastest current edge the probe can follow. For example, the CT6 reaches 2 GHz, and the TICP100 reaches 1 GHz. Meanwhile, the A621 stops at 50 kHz, which suits mains work.
• Current range and peak limits. Check both RMS or continuous current and the peak pulse limit. For instance, the TCP404XL handles 500 A DC continuous, while the CT6 handles 120 mA RMS. Also, respect amp-second limits on long pulses.
• Scope interface and power. TekVPI probes such as the TCP0020 and TCP0150 draw power from a compatible scope. However, the TCP303 needs a TCPA300 amplifier, and the CT probes need a 50 Ω input. So confirm the full system first.
• Jaw size and loop fit. The probe must close around your conductor without strain. For example, the A621 takes conductors up to 54 mm, while the CT6 takes a 0.8 mm wire. Flexible Rogowski loops also wrap around bus bars and thick cables. Our Tektronix A621 rental units in Vietnam ship ready for this kind of work.
• Isolation and shunt choice. IsoVu probes in the TICP family read current across a TICS shunt with galvanic isolation. Therefore, they suit high-side switching nodes. Shunt values from 5 mΩ to 5 Ω then set the current range and circuit loading.

Typical applications

Current probes appear wherever engineers must see how much current flows and when. The tasks below cover most rental and purchase requests in Vietnam. They range from power supply checks to motor drive, battery, and fast switching work.

• Power supply and inrush tests. Engineers capture inrush, ripple, and load steps on switch-mode supplies. So AC/DC probes like the TCP0030A show both the DC level and fast transients. As a result, teams confirm fuse and part ratings.
• Motor drive and inverter checks. Drives and inverters switch high currents in each phase. Therefore, engineers use TCP303, TCP404XL, or Rogowski probes on the phase leads. Then they compare current with gate signals on the same scope. Rental of the Tektronix A621 is available across Vietnam.
• GaN and SiC switching analysis. Wide-bandgap devices switch very fast at high voltage. So teams pair TICP IsoVu probes with TICS shunts in the power loop. That setup measures switching current while the probe stays isolated.
• Battery and EV current profiles. Battery packs and chargers draw large DC currents that change with load. For example, high-current AC/DC probes record charge and discharge profiles. In addition, the data supports efficiency and thermal studies.
• Pulse and noise troubleshooting. Fast current pulses often cause noise and false triggers in a system. So compact current transformers such as the CT1, CT2, and CT6 capture short spikes on thin wires. Engineers then trace the noise to its source.
• Mains and power quality work. Facility teams check load current on mains wiring and panels. Therefore, large clamps like the A621 and A622 and flexible TRCP loops suit this job. Always follow the CAT rating on each probe. Teams in Vietnam often choose Tektronix A621 rental for this reason.

Industries that use the Tektronix A621 rental Vietnam

Any product that converts or switches power needs current checks at some stage. That is why probes and shunts appear in labs, factories, and field teams. Here is how each sector in Vietnam uses them in design and production work.

• Power electronics. Makers of supplies, chargers, and inverters in Binh Duong and Dong Nai validate switching current every day. So they keep AC/DC probes on design benches. They also rent isolated probes and shunts for new GaN designs.
• Automotive and EV. EV, e-motorbike, and component plants in Vietnam test drives, chargers, and battery systems. Therefore, they need high-current AC/DC and Rogowski probes. Portable setups also help when engineers work at the vehicle.
• Electronics manufacturing services. EMS plants in Bac Ninh, Bac Giang, and Hai Phong measure board current during debug and failure analysis. As a result, compact AC/DC probes see daily use. Teams often rent extra units during production ramps. This applies to every Tektronix A621 rental we arrange in Vietnam.
• Renewable energy. Solar inverter and energy storage projects need current data on high-power converters. For example, flexible Rogowski loops wrap around thick cables and bus bars. Meanwhile, AC/DC probes check the DC link.
• Industrial automation. Factories run motors, drives, and servo systems that sometimes trip or overheat. So maintenance engineers use clamp probes to read phase current at the machine. This helps them find overload and imbalance faults.
• Education and research. Universities and research labs in Vietnam teach power electronics with hands-on tests. Therefore, they need safe, reliable current probes for many benches. Rental helps them equip a lab for one course or project.

Tektronix A621 rental Vietnam compared with other brands

Before you choose, compare the Tektronix A621 rental Vietnam with other well-known current probe lines. However, the best fit depends on your scope, conductor, and current levels. So start with range and bandwidth needs, and then compare interface and local support.

If your team already uses Tektronix scopes, these probes connect with little new training. Other makers offer strong current probes too, especially for their own scopes. Even so, confirm current specs with each maker before you compare. Specifications change, so confirm current data with each maker before you decide.

Rent or buy?

Buy a current probe when engineers use it every week on the same scope and circuits. Ownership also suits production benches with fixed current tests. However, many teams own a general AC/DC probe and rent high-current or isolated systems for big projects.

Selection tips

• Choose AC/DC when you need DC levels, inrush, or slow changes. Otherwise, an AC-only probe or a Rogowski loop may cover pulses and ripple well.
• Match bandwidth to your fastest current edge, not just the switching frequency. So fast GaN or SiC edges may need an isolated probe and shunt instead of a clamp. So, plan it early when you book a Tektronix A621 rental in Vietnam.
• Check peak, RMS, and continuous current limits together. Also review the amp-second limit for long pulses, because going past it can saturate the core.
• Confirm how the probe connects, such as TekVPI, BNC, or a separate amplifier. Then make sure your scope supports that interface and the needed input impedance.
• Measure the conductor or bus bar before you choose a jaw or loop size. For instance, thick cables may need a large clamp or a flexible Rogowski loop.
• For a shunt setup, pick a resistance that gives a usable voltage at your current. However, a higher value adds more loading and heat to the circuit.

Handling and care

• Close probe jaws gently and keep the core faces clean, because dirt adds error. Also store each probe, amplifier, and shunt in its case between jobs. Our Tektronix A621 rental units in Vietnam ship ready for this kind of work.
• Respect the voltage and CAT rating on every probe, since bare conductors can carry hazardous voltage. In addition, wear an ESD strap when you handle IsoVu tips and shunts.
• Let AC/DC probes warm up for the time the maker states. Next, degauss and zero the probe before precise DC readings, and repeat after any overload.
• Follow the calibration interval each maker states, which is often one year. Rental units ship with a valid calibration certificate, and we can arrange service through the maker or an authorized partner.
• Ship probes in padded cases with cables coiled loosely and jaws closed. In addition, keep them dry during Vietnam's humid wet season, because moisture harms sensors.

Frequently asked questions

Request a quote

Tell us the model, options, dates and delivery site, and we will reply with a quote. You can request a quote online or call 0902 327 669. Rental of the Tektronix A621 is available across Vietnam.