Bussmann (now a subsidiary of Eaton Corporation) offers a 315A fuse

Bussmann (now a subsidiary of Eaton Corporation) offers a 315A fuse element product line covering various voltage levels, breaking capacities, and application scenarios.

 I. Core Models and Parameters

1. **170M1472 (690V AC)**  

   - **Voltage/Current**: 690V AC, 315A  

   - **Applications**: Suitable for semiconductor protection, AC/DC drive systems, and power converters.  

   - **Breaking Capacity**: 80kA (compliant with IEC 60269 standard).  

   - **Dimensions**: 0.94 inches in height × 1.42 inches in width × 3.78 inches in length (24×36×96mm).  

2. **315NH3M (500V AC)**  

   - **Voltage/Current**: 500V AC, 315A.  

   - **Applications**: Motor protection, compliant with IEC/VDE certifications.  

   - **Technical Documentation**: Available through the manufacturer's official website or authorized distributors.  

3. **315BMT (240V AC)**  

   - **Voltage/Current**: 240V AC, 315A.  

   - **Applications**: Industrial, utility, and household circuits, compliant with BS88 standard.  

   - **Breaking Capacity**: 50kA (UL certified).  

4. **PV-315A-3L-15 (1500V DC)**  

   - **Voltage/Current**: 1500V DC, 315A.  

   - **Applications**: String protection in photovoltaic systems, compatible with SD 3L-S fuse holders.  

   - **Certifications**: UL 2579 (photovoltaic-specific), IEC 60269-6.  

   - **Breaking Capacity**: 33kA (at 1500V DC).  

5. **315FM (690V AC/450V DC)**  

   - **Voltage/Current**: 690V AC/450V DC, 315A.  

   - **Applications**: High-speed semiconductor protection, compliant with BS88 Part 4 and UL certification.  

   - **Breaking Capacity**: 200kA (AC) / 40kA (DC).  

II. Key Technical Features

- **Breaking Capacity**: Ranging from 80kA (basic type) to 200kA (high-spec models), selection should be based on the short-circuit current of the circuit.  

- **Certification Standards**:  

  - **UL Certification**: Models such as 315FM and PV-315A-3L-15 are suitable for the North American market.  

  - **IEC/BS88**: European and internationally recognized standards, applicable to models like 170M3067 and 315BMT.  

- **Installation Compatibility**:  

  - Some models (e.g., PV series) require matching dedicated fuse holders (e.g., SD 3L-S).  

  - Dimensions comply with DIN 43620 (NH series) or BS88 (FM series) standards.  

III. Purchasing Channels and Price Reference

1. **Authorized Distributors**  

   - Offer various models (e.g., 170M3067, 315LMT) with fast shipping within the United States.  

   - **RS Online**: The unit price of 170M1472 is approximately $157.93 (bulk discounts can reach $122.85 per unit).  

   - The unit price of model 170M1322 is $192.50, and it can be reduced to $158.40 per unit for bulk orders of 100 or more.  

   - PV-315A-3L-15, suitable for photovoltaic systems, has a unit price of approximately $839.47.  

2. **Local Resources in Los Angeles**  

   - Graybar has service centers near Los Angeles (e.g., Irvine, Santa Ana), with real-time inventory available on its official website.  

   - Local electrical distributors (WhatsApp: 0086-13811255435) may provide spot support.  

IV. Selection Recommendations

1. **Voltage Matching**: Prioritize models consistent with the nominal voltage of the circuit (e.g., photovoltaic systems require 1500V DC dedicated fuse elements).  

2. **Breaking Capacity**: Select based on short-circuit current calculation results; for example, industrial equipment typically requires 80kA or higher.  

3. **Certification Compliance**: For the North American market, UL-certified models (e.g., 315FM) are recommended; for the European market, prioritize IEC/BS88 standards.  

4. **Installation Method**: Confirm the type of fuse holder (e.g., DIN rail-mounted, bolt-mounted) to avoid size incompatibility.  

 V. Technical Support and Documentation

- **Installation Guidelines**:  

  - Ensure power is disconnected and verify with a voltage tester before operation. Pay attention to the direction of the fuse element during installation (e.g., the arrow on PV series should align with the current flow).  

  - After replacement, perform no-load and load tests to ensure good contact.  

VI. Notes

- **Replacement Compatibility**: Fuse elements from different series (e.g., NH, FM, PV) must not be mixed; strictly match the original model.  

- **Inventory Inquiry**: For urgent needs, it is recommended to contact distributors directly (e.g., via WhatsApp: 0086-13811255435) to confirm spot availability in Los Angeles warehouses.  

- **Price Fluctuations**: Bulk purchases are negotiable; for example, the bulk price of 170M1322 at Newark for 100 units is $158.40 per unit.