SMD-SPT 5×20 Surface Mount Fuse Data Sheet

Category: Circuit Protection Devices, Electronics, Schurter Inc

Overview

The SMD-SPT 5×20 is a surface mount fuse specifically tailored for primary protection on SMD PCBs (Printed Circuit Boards). It’s a time-lag fuse designed to comply with the IEC 60127-2 standard, made for use in industrial environments, and suitable for a variety of applications requiring reliable circuit protection.

Technical Specifications

The fuse has a rated voltage of 250VAC and 300VDC with a rated current range from 1 to 16A. Its breaking capacity is between 500A and 1500A, signifying its ability to handle overcurrent conditions without damage. The characteristic of the fuse is time-lag, meaning it allows a temporary current surge without blowing, beneficial for applications with inrush currents.

The SMD-SPT 5×20’s viability across a wide range of ambient temperatures is bolstered by its 55°C to 125°C admissible range and a climatic category rating of 55/125/21 according to IEC 60068. Its construction features a ceramic housing and gold-plated copper alloy terminals. The product’s markings include the rated current, rated voltage, characteristic, and breaking capacity. Storage conditions recommend temperatures up to 60°C with a maximum of 70% relative humidity.

Soldering and Resistance Properties

For soldering, specific guidelines are provided including a reflow soldering profile and resistance to soldering heat. The SMD-SPT 5×20 can withstand 245°C for 3 seconds, ensuring its solderability according to IEC 60068-2-58 Test Td. Additionally, it resists soldering heat up to 260°C for 10 seconds. The fuse has a moisture sensitivity level that meets J-STD-020 specifications. Its case resistance is tested to be 100 MΩ between leads and body, demonstrating good insulation.

Durability and reliability tests include resistance to vibration, moisture, thermal shock, solvents, and terminal strength, according to various standards such as IEC 60068-2-6, MIL-STD-202, and EIA/IS-722.

Approvals and Compliances

The datasheet emphasizes that SCHURTER products, including this fuse, receive approvals from independent testing bodies based on national and international standards. Specific standards applicable to industries like automotive (IATF 16949), medical technology (ISO 13485), or aerospace can be met with customer-specific agreements. Approval marks from VDE, UL, and CCC have been granted to the SMD-SPT 5×20, as indicated by the respective certificates and approval references.

VDE Approval

The VDE testing authority has certified the compliance of the fuse to safety requirements, and it bears a VDE certificate number of 40010881.

UL Approval

The UL has assigned the file number E41599 to the SMD-SPT 5×20, indicating its certification and compliance to their safety standards.

CCC Approval

The China Compulsory Certificate (CCC) also endorses the fuse, with the certificate number 2020970207000123, further confirming its conformance to safety standards.