# CT4066 Cal Test Differential Probe New

**Features:**

-   25 MHz bandwidth (-3 dB)
-   Up to ±700 V (DC + AC peak)
-   Attenuation 20x/50x/200x
-   High accuracy (±2%)
-   Power indicator LED
-   Meets IEC 61010-1:2010 CAT II safety standard

**Kit Contents:**

-   CT4066 Differential Probe
-   User Manual
-   (2) Pincer clips
-   (2) Alligator clips
-   (2) Sheathed 4 mm banana plug test leads, silicone jacketed
-   (1) Insulated BNC cable
-   (1) 9 V power adapter

**Specifications:**

All specifications apply to the unit after a temperature stabilization time of 20 minutes over an ambient temperature range of 25 °C ± 5 °C.

**Electrical Characteristics**

-   Bandwidth: 25 MHz (50x and 200x attenuation); 15 MHz (20x attenuation)
-   Rise Time: 14 ns for 50x and 200x; 23.4 ns for 20x
-   Attenuation: 20x, 50x, 200x
-   Accuracy: ±2% \*
-   AC CMRR: 80 dB @ 60 Hz; 60 dB @ 100 Hz; 50 dB @ 1 MHz
-   Maximum Input Voltage (20x) (DC + AC peak): ±70 V
-   Maximum Input Voltage (50x) (DC + AC peak): ±175 V
-   Maximum Input Voltage (200x) (DC + AC peak): ±700 V 
-   Absolute Maximum Rated Input Voltage (each side to ground): 600 Vrms
-   Input Impedance (Differential): 4 MΩ // 1.2 pF
-   Input Impedance (each side to ground): 2 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: 250 g
-   Dimensions: 195 x 55 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**

-   IEC 61010-1 CAT II

The Cal Test CT4066 is an active differential probe with a high input impedance and low input capacitance. With a 25 MHz bandwidth, this probe is great for working on a wide variety of measurements ranging up to ±700 V. The CT4066 is compatible with oscilloscopes from all major manufacturers.

## Details

- **Price:** 420.0 USD
- **Vendor:** Cal Test
- **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 | 420.00 USD | In stock |

## Images

- CT4066 Cal Test Differential Probe New

---

> Source: [ValueTronics](https://valuetronics.com/products/ct4066-cal-test-differential-probe-new)
> Updated: 2026-05-21