DZ47 Series Miniature Circuit Breaker (MCB)
Transparent Housing, Visible Safety - Industrial-Grade Circuit Protection
QHECO - Shandong Qinghua Yike Electric Co., Ltd.
Product Overview
The DZ47 Series Miniature Circuit Breaker is a high-performance thermal-magnetic circuit protector designed for residential, commercial, and light industrial electrical distribution systems. Featuring a transparent polycarbonate housing, the DZ47 provides visual confirmation of internal contact status, trip mechanism integrity, and connection quality - delivering an unprecedented level of operational transparency in a component that is traditionally opaque.
Manufactured to IEC 60898-1 and GB/T 10963.1 standards, the DZ47 combines reliable overcurrent protection with installation-friendly features that reduce commissioning time and improve long-term system safety.
Why Transparent Matters
| Traditional MCB | DZ47 Transparent MCB |
|---|---|
| Opaque housing hides contact condition | Visual inspection of contact wear and burn marks |
| Unknown if terminals are properly tightened | Visible torque confirmation - no loose connections |
| Trip mechanism status invisible | Clear view of bimetal strip and magnetic coil |
| Post-fault diagnosis requires disassembly | Instant visual assessment after short circuit |
| Counterfeit risk - hard to verify internals | Transparent body exposes substandard components |
"The transparent housing isn't a gimmick. It's a diagnostic tool. In 30 seconds, an electrician can assess whether a breaker needs replacement - without removing it from the DIN rail."
- Field Service Engineer, Southeast Asia
Technical Specifications
| Parameter | Value |
|---|---|
| Standard | IEC 60898-1 / GB/T 10963.1 |
| Poles | 1P, 2P, 3P, 4P (1P+N, 3P+N available) |
| Rated Current (In) | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated Voltage (Ue) | 230/400V AC (50/60Hz) |
| Breaking Capacity | 6kA (standard) / 10kA (high breaking) |
| Tripping Characteristic | B curve (3–5In) / C curve (5–10In) / D curve (10–20In) |
| Housing Material | Transparent polycarbonate (PC), UL94 V-0 |
| Contact Material | Silver alloy (AgNi) |
| Terminal Capacity | 1–35mm² rigid / 1–25mm² flexible |
| Mounting | 35mm DIN rail (IEC 60715) |
| Protection Rating | IP20 (terminal shroud optional) |
| Operating Temperature | -25°C to +55°C |
| Mechanical Life | 20,000 operations |
| Electrical Life | 10,000 operations (at rated current) |
| Certifications | CCC, CE, CB, RoHS |
Tripping Characteristics Guide
| Curve | Trip Range | Best For |
|---|---|---|
| B Curve (3–5In) | Fast trip on overload | Resistive loads: lighting, heating, computers |
| C Curve (5–10In) | Moderate inrush tolerance | Mixed loads: appliances, small motors, sockets |
| D Curve (10–20In) | High inrush tolerance | Inductive loads: transformers, pumps, compressors, welders |
Selection Rule:
No motors / low inrush → B curve
General distribution / mixed loads → C curve (most common)
High inrush motors / industrial → D curve
Product Features
Product Features
🔍 Transparent PC Housing
- Material: UL94 V-0 flame-retardant polycarbonate
- Benefit: Visual inspection of internal components without disassembly
- Durability: UV-stabilized; no yellowing after 10 years
⚡ Silver Alloy Contacts (AgNi)
- Material: 85% silver / 15% nickel
- Benefit: Low contact resistance, minimal arcing, long electrical life
- Visual confirmation: Transparent housing shows contact condition over time
🌡️ Bimetal Thermal Element
- Material: Composite bimetal strip
- Calibration: ±10% tolerance at reference temperature
- Visible: Thermal discoloration visible through housing indicates overload history
🧲 Electromagnetic Trip Coil
- Design: Solenoid with optimized magnetic circuit
- Response: <0.1s trip on short circuit (within magnetic trip range)
- Visible: Coil integrity checkable without test button
🔧 Tool-Free DIN Rail Mounting
- Clip design: Snap-on / snap-off without tools
- Positioning: Secure locking with audible click
- Removal: Orange release lever (visible in product image) for easy extraction
🔩 Large Terminal Capacity
- Cross-section: Accepts up to 35mm² cables
- Design: Elevated terminals for easy screwdriver access
- Torque: 2.5 N·m recommended; visible clamping through transparent body
Available Configurations
| Model | Poles | Current Range | Breaking Capacity | Application |
|---|---|---|---|---|
| DZ47-63/1P | 1P | 6–63A | 6kA / 10kA | Single-phase lighting circuits |
| DZ47-63/2P | 2P | 6–63A | 6kA / 10kA | Single-phase main protection |
| DZ47-63/3P | 3P | 6–63A | 6kA / 10kA | Three-phase motor circuits |
| DZ47-63/4P | 4P | 6–63A | 6kA / 10kA | Three-phase + neutral distribution |
| DZ47-63/1P+N | 1P+N | 6–40A | 6kA | Compact single-phase with neutral protection |
| DZ47-63/3P+N | 3P+N | 6–63A | 6kA | Compact three-phase with neutral protection |
Custom current ratings, curve types, and branding available for volume orders.
Application Scenarios
Application Scenarios
Residential
- Main distribution panel: 2P 40A–63A C curve as main breaker
- Lighting circuits: 1P 10A–16A B curve
- Socket circuits: 1P 16A–20A C curve
- Air conditioning: 2P 25A–32A C curve
- Water heater: 2P 20A–32A B curve
Commercial
- Office distribution: 3P 32A–63A C curve for sub-panels
- Retail lighting: 1P 10A–16A B curve
- HVAC equipment: 3P 25A–50A D curve for compressor inrush
- Kitchen equipment: 3P 32A–63A D curve for inductive loads
Light Industrial
- Machine tools: 3P 16A–32A D curve
- Pump stations: 3P 20A–40A D curve
- Welding equipment: 3P 25A–50A D curve (high inrush)
- Compressor control: 3P 20A–40A D curve
Quality Assurance
| Stage | Test | Method | Standard |
|---|---|---|---|
| Incoming Material | PC housing impact test | Izod impact tester | GB/T 1043 |
| Incoming Material | Silver content verification | XRF spectrometer | Internal spec |
| Assembly | Contact resistance | Micro-ohmmeter | ≤1mΩ per pole |
| Assembly | Trip characteristic | Automated test bench | IEC 60898-1 Annex B |
| Thermal Test | Temperature rise | Thermocouple at terminals | ≤60K at In |
| Short Circuit | Breaking capacity | Synthetic test circuit | 6kA / 10kA verification |
| Mechanical | Endurance | Automated cycling machine | 20,000 ops mechanical |
| Final Inspection | Visual + function | 100% manual + automatic | Zero defect shipment |
Packaging & Logistics
| Detail | Specification |
|---|---|
| Inner Packaging | Individual PE bag with silica gel |
| Outer Packaging | Corrugated carton, 120 units per carton (1P) |
| Labeling | Model, rating, curve, batch code, barcode, CCC/CE marks |
| MOQ | 1,000 units (mixed ratings negotiable) |
| Lead Time | 7–14 days for standard; 3–4 weeks for custom branding |
| Shipping | FOB Qingdao / CIF worldwide |
Related Products
| Product | Description | Pairing Application |
|---|---|---|
| RCBO (Residual Current Breaker with Overcurrent) | Combined MCB + RCD protection | Wet locations, socket circuits |
| RCCB (Residual Current Device) | Earth leakage protection only | Supplement to MCB protection |
| Distribution Boxes (Q5/HT/AT Series) | Enclosures for MCB mounting | Complete panel assembly |
| Busbar Systems | Copper busbar for MCB connection | Panel internal distribution |
| Cable Lugs (SC Series) | Terminal connectors | Panel wiring termination |
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