Siemens Fuse 3NE4333-6B
Original price was: $67.41.$61.28Current price is: $61.28.
Main Product Series – Function & Application Comparison
| Fuse Series | Operating Class | Key Features | Typical Applications |
|---|---|---|---|
| 3NE1 (SITOR gS) | gS (semiconductor protection + cable protection) | Blade contacts, NH00–NH3 sizes, 16–500A, 690V AC, front indicator, high breaking capacity (100kA) | Rectifier protection, DC drives, general industrial electronics, standard semiconductor protection |
| 3NE8 (SITOR gR) | gR (full-range semiconductor protection) | Blade contacts, NH00 size, 16–250A, 690V AC, fast-acting, ultra-low power dissipation | High-speed semiconductor protection, inverter input/output protection, UPS systems |
| 3NE3 (SITOR aR) | aR (partial-range semiconductor protection) | Blade or slotted contacts, NH1–NH3 sizes, 25–1250A, 690–1500V AC, back-up protection | High-power rectifiers, wind power converters, traction drives, high-voltage DC applications |
| 3NE1 (SITOR gPV) | gPV (photovoltaic) | Blade contacts, NH1 size, 125A, 1000V DC, UL/ IEC certified, front indicator | Solar string protection, PV combiner boxes, renewable energy systems |
Typical Applications & Industries:
✓ Semiconductor rectifier protection ✓ DC drive inputs/outputs
✓ Inverter and frequency converter protection ✓ UPS battery and bypass circuits
✓ Solar and wind power systems ✓ Traction and railway applications
✓ Industrial power supplies ✓ Electroplating and welding equipment
Detailed Description – Siemens 3NE SITOR Fuse Portfolio
1. 3NE1 Series (gS) – Standard Semiconductor Protection
The 3NE1 gS fuses are the most widely used SITOR fuses for protecting both semiconductor devices and cables. The “gS” operating class indicates full-range protection (overload + short-circuit) with semiconductor-grade speed .
Key Features:
✓ Dual protection: Protects both semiconductors and cables in one device
✓ Blade contact design: Standard NH blade contacts for easy mounting in LV HRC fuse bases or switch disconnectors
✓ Front indicator: Visual indication when fuse has operated
✓ Wide current range: 16A to 500A across NH00, NH1, NH2, NH3 sizes
✓ High breaking capacity: 100kA at 690V AC
✓ Silver-plated contacts: Low contact resistance, reliable operation
Sensing range: 16A to 500A | Voltage rating: 690V AC / 250V DC
Example models: 3NE1331-0 (350A, NH2, 42W power loss), 3NE1814-0 (20A, NH000, 3.5W), 3NE1225-0 (200A, NH1)
2. 3NE8 Series (gR) – Fast-Acting Semiconductor Protection
The 3NE8 gR fuses are designed for high-speed protection of sensitive semiconductor devices. The “gR” class provides full-range protection optimized for semiconductor applications .
Key Features:
✓ Ultra-fast response: Minimizes let-through energy to protect sensitive IGBTs and thyristors
✓ Low power dissipation: Reduces heat generation in enclosures
✓ High current handling: Up to 250A in compact NH00 footprint
✓ gR operating class: Full-range protection (overload + short-circuit) for semiconductors
✓ Blade contact design: Standard NH00 dimensions
Sensing range: 16A to 250A | Voltage rating: 690V AC
Example models: 3NE8003-1 (35A, 9W power loss), 3NE8017-1 (50A), 3NE8018-1 (63A)
3. 3NE3 Series (aR) – High-Voltage & High-Power Semiconductor Protection
The 3NE3 aR fuses are partial-range back-up fuses designed for very high current and voltage applications. The “aR” class provides short-circuit protection only (requires coordination with other overload protection) .
Key Features:
✓ High voltage ratings: Up to 1500V AC and 1000V DC
✓ High current ratings: Up to 1250A in NH3 size
✓ Slotted blade contact options: For screw mounting (170mm dimension)
✓ Low let-through energy: Minimizes damage to power semiconductors
✓ High breaking capacity: Suitable for high-power applications
Sensing range: 25A to 1250A | Voltage rating: 690–1500V AC / 1000V DC
Breaking capacity: Minimum 50kA (higher on request)
Example models: 3NE8725-1 (200A, NH000, 200kA breaking capacity), 3NE5325-0MK06 (200A, NH2, 1500V AC, 45kA DC breaking capacity)
4. 3NE1 (gPV) – Photovoltaic String Protection
The 3NE1222-4 is a specialized PV fuse for protecting solar strings in combiner boxes and inverters. It carries the “gPV” classification per IEC 60269-6 .
Key Features:
✓ 1000V DC rating: Designed for solar PV systems
✓ gPV operating class: Full-range protection for photovoltaic applications
✓ Front indicator: Visual confirmation of fuse status
✓ NH1 size: Standard dimensions for easy replacement
✓ Active product: Current lifecycle status from Siemens
Sensing range: 125A | Voltage rating: 1000V DC
Example model: 3NE1222-4
Key Technology Features Across 3NE Series
Operating Class Definitions
| Class | Full Name | Protection Type | Speed | Best For |
|---|---|---|---|---|
| gS | Full-range semiconductor + cable | Overload + short-circuit | Medium-fast | General semiconductor and cable protection |
| gR | Full-range semiconductor | Overload + short-circuit | Fast | Sensitive semiconductor protection |
| aR | Partial-range semiconductor | Short-circuit only (back-up) | Very fast | High-power systems with separate overload protection |
| gPV | Photovoltaic full-range | Overload + short-circuit | Fast | Solar PV string protection |
SENTRON Brand
All 3NE SITOR fuses are part of Siemens’ SENTRON product family – a comprehensive portfolio for low-voltage power distribution and protection .
Mechanical & Environmental Specifications
Mounting position: Any (preferably vertical)
Ambient temperature: -20°C to +50°C
Humidity rating: Up to 95% relative humidity
Contact plating: Silver-plated for low resistance
Approvals & Certifications
✓ IEC 60269 (all applicable parts)
✓ VDE 0636
✓ CCC (China Compulsory Certificate)
✓ cURus (US/Canada)
✓ EAC (Eurasian Conformity)
✓ RoHS compliant
Selection Guide – Understanding the Naming Convention (Siemens 3NE Series)
Siemens 3NE part numbers encode key specifications. Understanding the coding helps rapid selection.
Example 1: 3NE1 331-0
| Code | Meaning | Options |
|---|---|---|
| 3NE | Product family: SITOR semiconductor fuse | 3NE |
| 1 | Series / Operating class | 1 = gS, 3 = aR, 8 = gR, 1… = gPV |
| 3 | Size / Current range | (Variable) |
| 31 | Specific current rating | (Variable) |
| -0 | Design variant | -0 = standard blade contacts with indicator |
Example 2: 3NE8 003-1
| Code | Meaning | Options |
|---|---|---|
| 3NE | Product family | SITOR fuse |
| 8 | Series (gR semiconductor protection) | 8 = gR series |
| 003 | Current rating | 003 = 35A, 017 = 50A, 018 = 63A |
| -1 | Design variant | -1 = standard gR configuration |
Example 3: 3NE5 325-0MK06
| Code | Meaning | Options |
|---|---|---|
| 3NE | Product family | SITOR fuse |
| 5 | Series (high-voltage aR) | 5 = 1500V/1000V DC series |
| 325 | Current rating | 325 = 200A class |
| -0MK06 | Special variant | Slotted contacts, no indicator, special dimensions |
Model decoder examples:
| Model Number | Decoding |
|---|---|
| 3NE1331-0 | gS class, NH2 size, 350A, blade contacts, front indicator |
| 3NE1814-0 | gS class, NH000 size, 20A, blade contacts, front indicator |
| 3NE8003-1 | gR class, NH00 size, 35A, blade contacts |
| 3NE8725-1 | aR class, NH000 size, 200A, high breaking capacity |
| 3NE5325-0MK06 | aR class, NH2 size, 200A, 1500V AC, slotted contacts, no indicator |
| 3NE1222-4 | gPV class, NH1 size, 125A, 1000V DC, front indicator |
Size reference chart:
| Size Code | NH Size | Typical Current Range | Weight (approx.) |
|---|---|---|---|
| 000 | NH000 | 16–80A | 0.12–0.20 kg |
| 00 | NH00 | 25–125A | 0.19–0.20 kg |
| 1 | NH1 | 80–315A | 0.60–0.67 kg |
| 2 | NH2 | 200–500A | 0.80–0.85 kg |
| 3 | NH3 | 400–1250A | 1.20–1.25 kg |
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