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HomeProductsCircuit ProtectionElectrical, Specialty FusesSPP-4F50
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SPP-4F50 - Eaton - Bussmann Electrical Division

Manufacturer Part Number
SPP-4F50
Manufacturer
Bussmann (Eaton)
Allelco Part Number
98D-SPP-4F50
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
46,659 pcs available, New & Original
Parts Description
FUSE LINK 50A 700V BLADE
Package
Fuse Link
Data sheet
-
RoHs Status
 
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In stock: 46659

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Specifications

SPP-4F50 Tech Specifications
Eaton - Bussmann Electrical Division - SPP-4F50 technical specifications, attributes, parameters and parts with similar specifications to Eaton - Bussmann Electrical Division - SPP-4F50

Product Attribute Attribute Value
Manufacturer Bussmann (Eaton)
Size / Dimension -
Series Semitron™ SPP
Package / Case Fuse Link
Product Attribute Attribute Value
Package Bulk
Operating Temperature -
Mounting Type Requires Holder
Fuse Type -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.10.0040

Frequently Asked Questions(FAQ)

What are the key electrical specifications and mechanical requirements for integrating the SPP-4F50 fuse link into a high-reliability power distribution system?
The Eaton Bussmann Semitron™ SPP-4F50 is rated at 50 amps with a nominal voltage of 700V, making it suitable for medium-voltage industrial applications where sustained current handling and arc suppression are critical. As a blade-type fuse link, it requires an external holder to complete the circuit path and ensure proper contact integrity. The device must be mounted in a compatible fuse block designed to meet IEC or UL standards for medium-voltage protection. Given its classification under EAR99 and REACH unaffected status, sourcing is generally straightforward for global designs. However, thermal derating should be evaluated under continuous load conditions—typically allowing no more than 80% of the 50A rating for long-term reliability in enclosed environments.
How does the SPP-4F50 compare to other medium-voltage fuse links like the Bussmann 170M3709 in terms of interrupting capability and application suitability?
While both the SPP-4F50 and 170M3709 serve similar medium-voltage roles, the SPP-4F50 is specifically engineered as a blade-style link requiring a separate holder, whereas the 170M3709 may integrate differently into panel layouts. The SPP-4F50’s 700V rating aligns with standard industrial bus voltages, offering comparable interruption performance under fault conditions. However, without identical test data, direct comparison of arc energy dissipation or response time isn't feasible. Designers should consult full test reports for coordination studies, especially when replacing legacy components in existing systems where footprint and mounting constraints may favor one over the other.
What design considerations apply when selecting a fuse holder for the SPP-4F50 to ensure compliance with safety and performance standards?
Selection of an appropriate fuse holder is mandatory due to the SPP-4F50’s "Requires Holder" designation. The holder must support 50A continuous current at up to 700V AC, maintain low contact resistance (<50 µΩ typical), and provide secure mechanical retention per IEC 60691 or UL 248-22. Environmental sealing may be necessary in humid or dusty installations, and thermal management must account for heat generated during normal operation and fault interruption. Coordination between the holder’s breaking capacity and the fuse’s I²t characteristics ensures selective tripping in multi-stage protection schemes.
Can the SPP-4F50 be used in DC applications, and what limitations exist compared to AC-rated fuses?
Although not explicitly labeled for DC use, the SPP-4F50’s 700V rating suggests potential applicability in low-to-medium DC systems, such as renewable energy inverters or motor drives. However, DC arcs persist longer than AC arcs due to absence of zero-crossings, increasing arcing energy and contact erosion risk. Without manufacturer validation for DC interruption, derating by 20–30% in current and careful coordination with downstream devices is advisable. For critical DC circuits, consult Eaton’s application notes or request qualification testing before deployment.
What is the significance of the Moisture Sensitivity Level (MSL) rating of 1 for the SPP-4F50 in manufacturing and field reliability?
An MSL of 1 indicates that the SPP-4F50 is non-hygroscopic and unaffected by moisture exposure during storage or assembly. This simplifies handling in cleanroom or uncontrolled environments, eliminating the need for bake-out procedures before soldering or integration. It supports just-in-time manufacturing strategies and reduces logistical complexity in high-volume production. However, while internal materials remain stable, external solder joints or adjacent PCB contaminants could still affect performance—so general IPC hygiene practices should still apply.
In what types of industrial equipment would the SPP-4F50 be most appropriately deployed, and why?
The SPP-4F50 is well-suited for medium-voltage motor control centers (MCCs), transformer primary protection, and switchgear feeder circuits where space is constrained and modular replacement is beneficial. Its blade design allows compact layout in standardized fuse blocks, facilitating maintenance without panel disassembly. The 50A rating matches common motor starting currents and transformer inrush tolerances, enabling reliable overcurrent protection without nuisance tripping. When paired with a properly rated holder, it offers robust performance in harsh industrial settings compliant with NEC Article 450 and IEC 60204-1.
How should the SPP-4F50 be coordinated with upstream and downstream protective devices in a layered protection scheme?
Proper coordination ensures only the nearest fault-protecting device trips, minimizing downtime and collateral damage. The SPP-4F50’s time-current curve must be analyzed against both upstream breakers and downstream branch fuses using I²t curves or software tools. Typically, the fuse should operate faster than the next higher-level protector during overloads but slower than downstream devices during faults. For example, if a downstream 30A fuse has an I²t of 100 A²s, the SPP-4F50 should clear a fault with less than 100 A²s to maintain selectivity. Miscoordination can lead to cascading failures or inadequate protection.
Are there environmental or installation factors that could degrade the performance of the SPP-4F50 beyond its datasheet ratings?
Yes. Elevated ambient temperatures (>40°C) reduce effective current-carrying capacity due to increased resistance and slower heat dissipation. In sealed enclosures, cumulative heat from multiple devices may necessitate derating. Vibration or mechanical stress can compromise contact pressure in the holder, raising resistance and causing localized heating. Dust accumulation on contacts increases thermal impedance, potentially triggering premature aging. Regular inspection intervals and adherence to spacing guidelines per NFPA 70E help mitigate these risks in real-world deployments.

Parts with Similar Specifications

The three parts on the right have similar specifications to Eaton - Bussmann Electrical Division SPP-4F50

Product Attribute SPP-4F150 SPP-4F250 SPP-4F300 SPP-4F400
Part Number SPP-4F150 SPP-4F250 SPP-4F300 SPP-4F400
Manufacturer Eaton - Bussmann Electrical Division Eaton - Bussmann Electrical Division Eaton - Bussmann Electrical Division Eaton - Bussmann Electrical Division
Size / Dimension - - - -
Fuse Type - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -

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Evaluation: 10 Articles

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    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

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    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

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    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

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Delivery Cost

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(Different time frame / countries / package size has different price.)

Delivery Method

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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SPP-4F50

Eaton - Bussmann Electrical Division
98D-SPP-4F50

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