# Cal Test Electronics CT4071 50 MHz Differential Probe

# Cal Test Electronics CT4071 50 MHz Differential Probe

## Key Features At A Glance

-   Active differential probe with high input impedance and low input capacitance
-   50 MHz bandwidth (-3 dB)
-   Selectable 100x / 200x / 500x / 1000x attenuation
-   Maximum input up to ±3500 V (DC + AC peak) at 1000x attenuation
-   ±2% accuracy (based on DMM with 10 MΩ input impedance)
-   AC CMRR up to 80 dB at 60 Hz, decreasing with frequency
-   Power indicator LED with included 9 V power adapter
-   Meets IEC 61010-1:2010 CAT II safety standard; Pollution Degree 2

The Cal Test Electronics CT4071 is a 50 MHz active differential probe designed with a high input impedance and low input capacitance. It accepts measurements ranging up to ±3500 V (DC + AC peak) and is compatible with oscilloscopes from all major manufacturers, delivering its output through an insulated BNC cable into a standard 1 MΩ oscilloscope input.

A differential probe measures the voltage between two points in a circuit rather than between a single point and ground, allowing an engineer to observe signals that are not referenced to earth. The CT4071 supports a wide variety of such measurements across its four selectable attenuation settings, with the maximum measurable voltage scaling from ±350 V at 100x up to ±3500 V at 1000x.

ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois.

## Accessories Supplied

-   Differential Probe
-   (2) High voltage hook probes
-   (2) Alligator clips
-   (2) Retractable, sheathed 4 mm banana plug test leads, silicone jacketed
-   (1) Insulated BNC cable
-   (1) 9 V power adapter

## Product Core & Specifications

Specification

Value

Electrical Characteristics

Bandwidth

50 MHz

Rise Time

7 ns for 200x, 500x, & 1000x; 14 ns for 100x

Attenuation

100x, 200x, 500x, 1000x

Accuracy

±2% \*

AC CMRR

80 dB @ 60 Hz; 60 dB @ 100 Hz; 50 dB @ 1 MHz

Maximum Input Voltage (100x) (DC + AC peak)

±350 V

Maximum Input Voltage (200x) (DC + AC peak)

±700 V

Maximum Input Voltage (500x) (DC + AC peak)

±1750 V

Maximum Input Voltage (1000x) (DC + AC peak)

±3500 V

Absolute Maximum Rated Input Voltage (each side to ground)

2500 Vrms

Input Impedance (Differential)

54 MΩ // 1.2 pF

Input Impedance (each side to ground)

27 MΩ // 2.3 pF

Output Voltage Swing

±8 V (driving 1 MΩ oscilloscope input)

Offset (typical)

±5 mV

Noise (typical)

2 mVrms

Source Impedance

50 Ω

Power Supply

9 V power adapter (included)

Mechanical Characteristics

Weight (probe only)

280 g

Dimensions

240 x 80 x 30 mm

BNC Cable Length

100 cm

Input Leads Length

55 cm each

Environmental Characteristics

Operating Temp/Humidity

0°C to 50°C / 10% to 85% RH

Storage Temp/Humidity

\-30°C to 70°C / 10% to 90% RH

Pollution Degree

Pollution Degree 2

Safety Specifications

Safety Standard

IEC 61010-1 CAT II

> **Important:** Absolute maximum rated input voltage: 2500 Vrms (each side to ground).

> **Important:** Accuracy (±2%) is based on a DMM with 10 MΩ input impedance.

> **Important:** Meets IEC 61010-1:2010 CAT II safety standard.

> **Important:** Maximum input voltage varies by attenuation setting: ±350 V (100x), ±700 V (200x), ±1750 V (500x), ±3500 V (1000x), DC + AC peak. Observe the Maximum Input Voltage Derating Curve at higher frequencies.

## About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

**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:** 565.0 USD
- **Vendor:** Cal Test Electronics
- **Type:** Diff Probe
- **Tags:** Accessories, Cal Test Electronics, Differential, Manufacturers, Other Equipment, Probe, product_manual_group_1, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 565.00 USD | In stock |

## Images

- CT4071 Cal Test Differential Probe

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> Source: [ValueTronics](https://valuetronics.com/products/ct4071-cal-test-differential-probe-new)
> Updated: 2026-06-27