# Shelly 400A CT Pro 3EM Split Core Current Transformer For Shelly Pro 3EM

## Shelly 400A CT Pro 3EM Split Core Current Transformer For Shelly Pro 3EM

This is the split-core 400A current transformer designed specifically for the Shelly Pro 3EM-400A, using a snap-on, screwless mounting system with a keyed 2-pin connector matched to the Pro 3EM's CT ports. Three of these clamps ship as standard with a new Shelly Pro 3EM-400A unit, one per phase, for non-contact current sensing on higher-capacity incoming supplies. It is a different part from both the 120A Pro 3EM clamp and the legacy Shelly EM clamps.

### Specifications

**SKU**

SHELLY 400A CT PRO 3EM

**Brand**

Shelly

**Category**

Smart Home

**Key Specs**

Compatible with: Shelly Pro 3EM-400A ONLY; Rated primary current: 400A; Clamp type: split-core, snap-on/screwless mount, 2-pin MX3.0-2x1Y connector; Sold as replacement/spare (3 included per Pro 3EM-400A unit)

## Details

- **Price:** 1929.0 ZAR
- **Vendor:** Shelly
- **Type:** Smart Home
- **Tags:** Nology, Shelly, Smart Home

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1929.00 ZAR | In stock |

## Images

- Shelly 400A CT Pro 3EM Split Core Current Transformer For Shelly Pro 3EM

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> Source: [Guards On Duty Shop & Security Guards ](https://guardsondutyshop.co.za/products/shelly-shelly-400a-ct-pro-3em)
> Updated: 2026-07-07