SIEMENS 3NE8731-1 Sitor Fuse Link 690VAC 440VDC NH000

( Brand: Siemens ), ( Manufacturer Part Number: 3NE8731-1 ), ( Part Type: Fuse )

Review SIEMENS Sitor Fuse Link 315a 690vac 440vdc

The **Siemens 3NE8731-1 SITOR Fuse Link (NH000)** is a high-performance, industrial-grade fuse designed to provide reliable overcurrent protection in demanding electrical systems operating under stringent conditions. Part of Siemens robust **SITOR** series, this fuse link is engineered for applications requiring precise current interruption and long-term stability, making it an ideal choice for medium-voltage power distribution networks, industrial machinery, and critical infrastructure where safety and efficiency are paramount. With a **690V AC / 440V DC** voltage rating, it is specifically tailored for use in systems where voltage fluctuations and transient surges are common, ensuring consistent protection against overloads, short circuits, and fault currents. The **NH000** fuse base design adheres to the **NH (Norme Haute)** standard, offering compatibility with Siemens modular fuse switchgear and circuit breakers, facilitating seamless integration into existing or new electrical installations. Constructed from high-quality materials, this fuse link features a **silver-plated contact system** that minimizes resistance and prevents corrosion, enhancing both performance and longevity. Its **time-delay characteristic** allows for selective tripping, protecting downstream equipment while permitting temporary overloads without unnecessary disruptions. The robust **ceramic or porcelain housing** provides mechanical strength and thermal insulation, ensuring safe operation even under extreme environmental conditions, such as high humidity, dust, or temperature variations. Whether deployed in industrial plants, renewable energy systems, or commercial facilities, the **3NE8731-1** delivers dependable protection with a **high interrupting capacity**, effectively clearing faults within milliseconds to prevent equipment damage and minimize downtime. Siemens rigorous quality control and compliance with international standards, including **IEC 60269-2**, guarantee its reliability and performance, making it a trusted solution for engineers and electricians seeking a balance of precision, durability, and safety in their electrical protection strategies.

### **Pros and Cons of buying a Siemens 3NE8731-1 SITOR Fuse Link (690VAC/440VDC, NH000)**

1. **High Voltage and Current Rating** The 690VAC/440VDC rating makes it suitable for industrial applications, including inverters, converters, and high-power electrical systems. This ensures compatibility with demanding environments where voltage fluctuations or surges are common.

2. **SITOR (Silicon-Impregnated Tantalum Oxide Resistor) Technology** SITOR fuse links provide superior arc-quenching performance compared to traditional ceramic or glass fuse elements. This reduces the risk of restrikes and improves reliability in high-speed fault conditions.

3. **NH000 (NH-Series) Compatibility** The NH000 designation means it fits standard NH fuse blocks, making installation straightforward in existing electrical panels. This interoperability reduces the need for custom modifications.

4. **Fast-Blow or Time-Delay Options** Depending on the specific variant (if available), this fuse can be configured for either fast-acting protection (for transient surges) or time-delay protection (for sustained overloads), offering flexibility in circuit design.

5. **Reliability from Siemens** Siemens is a well-established manufacturer in industrial electrical components, known for quality, durability, and compliance with international standards (IEC, UL, etc.).

6. **Easy Replacement** Since it is a standard NH fuse, replacements are readily available, reducing downtime in maintenance scenarios.

7. **Thermal Stability** The SITOR material resists thermal degradation better than some alternatives, extending the fuse s lifespan under normal operating conditions.

---

1. **Cost** Compared to generic or lower-end fuse links, Siemens components are typically more expensive. For applications where budget is a constraint, this may be a drawback.

2. **Limited Availability Outside Specialized Suppliers** While Siemens parts are widely recognized, they may not be as commonly stocked in general electrical supply stores as basic ceramic fuses. Purchasing may require ordering from industrial distributors or Siemens-authorized dealers.

3. **Potential Overkill for Low-Power Systems** If the application involves low-voltage or low-current circuits where a standard glass or ceramic fuse would suffice, the higher rating of this SITOR fuse may be unnecessary, leading to wasted cost.

4. **Specialized Knowledge Required** Installing or replacing NH fuses, especially in high-voltage systems, requires proper training to avoid misalignment or incorrect ratings, which could compromise safety.

5. **Single-Use Design** Like most fuses, this is a single-use component. Once it blows, it must be replaced, which adds to long-term maintenance costs.

6. **Compatibility Concerns** While NH000 is standard, ensure the specific fuse block and circuit design fully support the SITOR fuse s characteristics (e.g., interrupting capacity). Mismatches could lead to premature failure or inadequate protection.

7. **Environmental Sensitivity** SITOR fuses may be more sensitive to humidity or contamination than ceramic fuses, requiring careful handling and storage to maintain performance.

---

### **Conclusion**

The **Siemens 3NE8731-1 SITOR fuse link** is an excellent choice for **high-reliability industrial applications** where voltage spikes, high currents, and fast fault clearance are critical. Its advanced arc-quenching technology, compatibility with NH systems, and Siemens reputation for quality make it a robust solution for demanding environments. However, its **higher cost, specialized requirements, and potential overkill for simpler systems** may not justify its use in low-voltage or cost-sensitive applications.

If your application involves **inverters, solar power systems, motor controls, or other high-power electrical setups**, this fuse is highly recommended. For **residential, low-voltage, or budget-constrained projects**, a standard ceramic or glass fuse may be more appropriate.

- You are working in an **industrial or high-voltage environment** (e.g., 440V DC or 690V AC systems).

- Reliability and fast fault interruption are priorities.

- You have access to NH fuse blocks and can justify the cost.

- Your application involves **low-voltage or low-current circuits** where a simpler fuse would suffice.

- Budget constraints make Siemens parts impractical.

- You lack experience with NH fuses or high-voltage systems.

Details:

Technical Specifications: Manufacturer: SIEMENS. Product highlights: The SIEMENS 3NE8731-1 fuse link is a Sitor designed for 315 Amp, 690 VAC and 440 VDC applications. It is a NH000 size fuse link with front indicator and bolt-on links. It is suitable for AC 690V DIN 43653, SZ.00,COMPACT UNIT.

Standard Brand: SIEMENS.: The SIEMENS 3NE8731-1 is a Sitor fuse link with current rating of 315 Amp, designed for 690 VAC and 440 VDC applications.

part #: 3ne87311 prices

• $76.50-$362.80

specifications refrigerhva:

• brand: Siemens
• mpn: 3ne8731-1
• part type: Fuse

offer refrigerhva:

• quantity: 4
• availability: In Stock
• sold: 0
• started: May 14, 2026
• options: Ship-to-home

returns refrigerhva:

• paid by: Seller
• policy: Returns Accepted
• method: Money back
• time: 30 Days

seller refrigerhva:

• city: Dresher, PA
• # reviews: 32438
• rating: 99.4%

payments refrigerhva:

• other
• wallet: Apple-pay
• credit card: Visa

general refrigerhva:

• condition: New
• HVAC Refrigeration > HVAC Refrigeration Components > Evaporators

shipping refrigerhva:

• service: Standard
• cost: $0.00
• type: Fixed
• class: Standard
• transit: 4-8 Days

Siemens 3NE8731-1 Is Similar To:

• Siemens 5sd470 Fuse Link 63a 500v Ac dc Diii E33 Thread (53.1% similar) This quick-acting fuse is size iii with E33 threads and has a current rating of 63A. The 5SD470 offers reliable circuit protection in various electrical systems.: standard brand: Siemens. Speed: fast acting.: the Siemens 5SD470 is a sliced fuse link designed for semiconductor protection. Technical ...(April 24th, 2026)