# Keysight N2780B 2 MHz AC/DC Current Probe

# Keysight N2780B 2 MHz AC/DC Current Probe

## Key Features At A Glance

-   Active probe amplifiers covering bandwidths from 1.5 GHz through 30 GHz across the InfiniiMax I, II, III, III+, RC, and Ultra families
-   InfiniiMode capability on Gen III+, RC, and Ultra amplifiers enables differential, single-ended A, single-ended B, and common-mode measurements from a single probe connection
-   Two input-impedance architectures available: RC (Gen I, II, RC, Ultra) for lowest mid-band loading and RCRC (Gen III, III+) for higher bandwidth on lower-impedance sources
-   Probe-specific DSP correction with stored S-parameter data for accurate frequency response, with True View and Source Estimate correction modes on Ultra series
-   Extreme-temperature probe heads (MX0100A micro probe head, MX0109A solder-in head) rated -55 to +150 °C per JEDEC JESD22-A104 revision E for environmental chamber testing
-   AutoProbe I and AutoProbe II interfaces with adapter compatibility (N5442A, N2852A) spanning Infiniium MXR, EXR, S-Series, 9000, 90000A, 90000X/Q, V, Z, and UXR Series oscilloscopes
-   Broad accessory ecosystem including ZIF probe heads, solder-in heads, browser heads, SMA heads, QuickTip magnetic heads, and replaceable damping-resistor tips
-   Companion probes include optical-to-electrical converters (N7004A 33 GHz, N7005A 60 GHz), the N7010A active termination adapter, power rail probes, current probes, and high-voltage differential probes

The Keysight Infiniium Oscilloscope Probes and Accessories catalog covers the complete probing ecosystem for Infiniium real-time oscilloscopes, spanning active differential probe amplifiers, single-ended active probes, current probes, high-voltage differential probes, passive probes, optical-to-electrical converters, and supporting accessories. The catalog documents the InfiniiMax I, II, III, III+, RC, and Ultra probe families along with companion products that together address signal-fidelity, loading, connectivity, and form-factor requirements for high-speed digital, RF-adjacent, power-electronics, and optical measurement work.

Per the datasheet, applications addressed by these probes include high-speed digital design and debug on dense IC and PCB layouts, mixed-signal embedded system measurements, environmental-chamber testing across -55 to +150 °C, optical telecom and datacom signal characterization including PAM4 measurement capabilities such as TDECQ when used with the N7005A 60 GHz O/E converter, EMI-sensitive low-current measurement, high-voltage power-device testing up to 2 kV mains isolated, and high-bandwidth eye-diagram and protocol-compliance work alongside the host Infiniium oscilloscope.

ValueTronics International, LLC stocks Keysight Infiniium oscilloscope probes and accessories across new authorized distribution and verified pre-owned inventory at our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Each {{CONDITION}} probe and accessory is processed through our receiving, inspection, and documentation workflow in Elgin before it ships, with serial-tracked records maintained for the catalog. Operating since 1992, ValueTronics combines authorized Keysight new equipment distribution with a deep professionally graded used inventory across the InfiniiMax I, II, III, III+, RC, and Ultra families along with the optical, power rail, current, differential, and passive probe lines documented in this catalog.

## Brand Heritage

The Infiniium oscilloscope and probe product lines were originated by Hewlett-Packard, transferred to Agilent Technologies in 1999 when HP spun out its test and measurement business, and then transferred to Keysight Technologies in 2014 when Agilent separated its electronic measurement business. Probes carrying HP, Agilent, and Keysight branding across this lineage are all part of the same engineering and product-support continuity referenced in this catalog.

## Compare Other Models in This Series

The InfiniiMax probing system documented in this catalog spans six amplifier families — InfiniiMax I (1130B/31B/32B/34B), InfiniiMax II (1168B/69B), InfiniiMax III (N2801A/02A/03A), InfiniiMax III+ (N2830A/31A/32A and N7000A/01A/02A/03A), InfiniiMax RC (MX0023A), and InfiniiMax Ultra (MX0020A through MX0025A). The families differ in bandwidth tier, input-impedance architecture (RC versus RCRC), supported attenuation ranges, and feature set including InfiniiMode capability and probe response correction modes.

Companion families in the same catalog include optical-to-electrical converters (N7004A, N7005A), the N7010A active termination adapter, InfiniiMode single-probe-tip active probes (N2750A/51A/52A), single-ended active probes (N2795A/96A/97A), power rail probes (N7020A, N7024A), high-voltage differential probes (DP0001A, N2790A/91A/891A, N2804A/05A), general-purpose differential probes (N2818A/19A), AC/DC current probes (1146B, 1147B/N2893A/N7026A, N2780B/81B/82B/83B/83L), Rogowski coil AC current probes (N7040A/41A/42A), high-sensitivity current probes (N2820A/21A), general-purpose passive probes (N2870A–N2876A), extreme-temperature passive probe (N7007A), and high-voltage passive probe (10076C).

Each new probe model and accessory in this catalog is listed on its own product page with condition-matched pricing and inventory status. Use the model-specific page for the InfiniiMax amplifier, probe head, optical converter, current probe, differential probe, or accessory you need to confirm exact configuration and availability.

The primary differences across the InfiniiMax amplifier families documented are bandwidth and architecture. InfiniiMax I covers 1.5, 3.5, 5, and 7 GHz; InfiniiMax II covers 10 and 13 GHz; InfiniiMax III covers 20, 25, and 30 GHz with RCRC architecture; InfiniiMax III+ covers 4, 8, 13, 16, and 20 GHz with RCRC architecture and adds InfiniiMode support; InfiniiMax RC covers 25 GHz with RC architecture; InfiniiMax Ultra covers 10, 13, 16, 20, and 25 GHz with RC architecture, InfiniiMode support, and True View / Source Estimate correction modes.

Companion product differences include optical bandwidth (N7004A at 33 GHz, N7005A at 60 GHz), power rail probe bandwidth (N7020A at 2 GHz, N7024A at 6 GHz), high-voltage differential probe bandwidth and rating (DP0001A at 400 MHz with 2 kV mains isolated, N2891A at 70 MHz with 7 kV at 1000:1), and current probe bandwidth ranges from DC to 50 MHz (1147B) through DC to 150 MHz (N7026A) for AC/DC current probes and DC to 30 MHz typical for the N7041A/N7042A Rogowski coil probes. Refer to the comparison table accompanying each product family for the per-model specifications.

Model

Bandwidth

Probe Interface

Attenuation Ratio

**N2780B**

DC to 2 MHz

1 MΩ BNC (requires N2779A power supply)

0.01 V/A

MX0020A

10 GHz

AutoProbe II

1:1, 4:1, 7.6:1 (auto-selected)

MX0021A

13 GHz

AutoProbe II

1:1, 4:1, 7.6:1 (auto-selected)

MX0022A

16 GHz

AutoProbe II

1:1, 4:1, 7.6:1 (auto-selected)

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

## Product Core & Specifications

Specification

N2780B/L Series

Bandwidth (–3 dB)

N2780B: DC to 2 MHz; N2781B: DC to 10 MHz; N2782B: DC to 50 MHz; N2783B: DC to 100 MHz; N2783L: DC to 80 MHz

Maximum current (continuous)

N2780B: 500 A; N2781B: 150 A; N2782B/83B/83L: 30 A

Maximum peak current (non-continuous)

N2780B: 700 A peak; N2781B: 300 A peak; N2782B/83B/83L: 50 A peak

Maximum input voltage

N2782B, 83B, 83L: 300 V mains isolated; N2780B, 81B: 300 V CAT III, 600 V CAT II

Output voltage rate

N2780B/81B: 0.01 V/A; N2782B/83B/83L: 0.1 V/A

Amplitude accuracy

N2780B: ± 1.0% rdg ± 500 mA; N2781B: ± 1.0% rdg ± 100 mA; N2782B/83B/83L: ± 1.0% rdg ± 10 mA

**Important:** Maximum non-destructive input voltage on InfiniiMax Ultra and RC probe amplifiers is 30 V peak (mains isolated). With the MX0105A SMA probe head, maximum input power into 50 Ω is 100 mW or 2.28 Vrms (Vin–Vcm\_term).**Important:** InfiniiMax III and III+ probe amplifiers are not compatible with existing InfiniiMax I or II probe heads. Likewise, N54xxA InfiniiMax III/III+ probe heads are not compatible with InfiniiMax I or II probe amplifiers.**Important:** RC probe heads are only compatible with RC probe amplifiers; RCRC probe heads are only compatible with RCRC probe amplifiers.**Important:** The N2800A 16 GHz InfiniiMax III probe is discontinued and replaced by the N7002A 16 GHz InfiniiMax III+ probe.**Important:** UXR oscilloscopes with AutoProbe III interface (1 mm and 1.85 mm models) require the N2852A interface adapter to accommodate probes with AutoProbe II interface.**Important:** To use AutoProbe I probes (1130B/31B/32B/34B, 1168B/69B, N2830A/31A/32A) with Infiniium UXR (3.5 mm models), V, Z, Q, and 90000X Series, the N5442A adapter is required. For UXR 1 mm and 1.85 mm models, cascaded use of the N5442A and N2852A adapters is required.**Important:** The 1147B, N2790A and N2893A are not compatible with 80000, 90000 and 90008 Series scopes.**Important:** To use the N2780B/81B/82B/83B/83L current probes, the N2779A power supply is required.**Important:** N7020A power rail probe is compatible with Infiniium S-Series or 9000 Series with software rev. 5.20 or higher.**Important:** DP0001A: Input coupling of the oscilloscope must be AutoProbe Interface 50 Ω to achieve the best performance and to avoid damage to the probe.**Important:** N2820A/21A high-sensitivity current probes require Infiniium 9000A/H with software version 4.2 or higher, or Infiniium S Series with software version 5.0 or higher.**Important:** To use the 10076C high voltage passive probe with Infiniium 90000 Series, use the E2697A high impedance probe adapter. For use with the Infiniium 90000 X- and 90000 Q-Series, use the N5449A high impedance probe adapter.Recommended pairing: combine the InfiniiMax III/III+ probe amplifier with the N5439A ZIF probe head and N2838A 450 Ω PCB ZIF tips, N5440A 450 Ω ceramic ZIF tips, or N5447A 200 Ω ceramic ZIF tips as listed in the InfiniiMax III/III+ accessory table.

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 9333.0 USD
- **Vendor:** Keysight
- **Type:** Act Prob
- **Tags:** Current, Keysight, Keysight Technologies, Manufacturers, Other Equipment, Probe, product_manual_group_3, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 9333.00 USD | In stock |

## Images

- N2780B Keysight Technologies Current Probe

---

> Source: [ValueTronics](https://valuetronics.com/products/n2780b-keysight-current-probe-new)
> Updated: 2026-05-30