One time SMD Fuse is the core component of electronic circuit protection, and its category can be classified based on factors such as melting characteristics, packaging size, material technology, and application scenarios. The following are its main classifications and characteristics:
1、 Classified by circuit breaker characteristics
Fast Blow type
Features: Fast response speed, suitable for stable circuits without surge current (such as precision instruments and semiconductor circuits).
Parameter: The melting time is usually in the millisecond range, for example, melting within 5 seconds at 200% rated current.
Typical models: such as Schurter's 3413.0009.22 series (200mA/63V, quick break type).
Slow Blow/Time Delay
Features: Strong surge resistance, suitable for scenarios with startup surge currents such as motors and transformers.
Parameters: It takes tens of seconds to several minutes to melt at 200% rated current, for example, the JFC24102100TS slow break type requires 120 seconds to melt at 200% current.
Very Fast Acting
Features: Made of silver alloy material, with extremely strong current limiting ability, used to protect highly sensitive components such as semiconductors.
Parameter: The melting time is as short as microseconds, for example, the Baodian BFS0402 series can melt within 5 seconds at 200% current.
Double alloy slow melting type
Features: Combining two types of alloy materials to enhance impact resistance, suitable for frequent pulse current scenarios (such as industrial power modules).
2、 Classified by packaging size
|Package model | Size (mm) | Typical current range | Applicable scenarios|
|0402 | 1.0 × 0.5 | 0.1A~5A | Micro devices (smartwatch, TWS earphones)|
|0603 | 1.6 × 0.8 | 0.5A~6A | Mobile phone, digital camera|
|1206 | 3.2 × 1.6 | 0.35A~40A | Power module, display|
|2410 | 6.1 × 2.5 | 2A~10A (high voltage scenario) | Communication base station, industrial equipment|
3、 Classified by materials and processes
Thin film patch fuse
Material: FR4 substrate+copper tin alloy fuse, working temperature ≤ 125 ℃.
Advantages: Low cost, suitable for conventional circuits such as consumer electronics.
Ceramic patch fuse
Material: Ceramic matrix, temperature resistance up to 150 ℃.
Advantages: High reliability, suitable for high-temperature environments (such as automotive electronics).
Thick film process fuse
Material: Silver alloy melt+ceramic substrate, with strong surge resistance (such as the Satte 0603SD series).
4、 Classified by application scenario
Consumer Electronics
Model examples: 0402 quick break type (such as JFC04022A), 0603 slow break type (such as S06033.0A).
Scenario: Fast charging for mobile phones, digital cameras, smart homes.
Automotive Electronics
Model example: Automotive grade fuse (such as AECQ certified model, high temperature resistance, vibration resistance).
Scenario: In car charger (OBC), BMS battery management system.
Industry and Communication
Model examples: High voltage series (such as FRHV 250VDC), high current models (such as 1206FA 40A).
Scenario: 5G base station, industrial power module, energy storage system.
5、 Core parameters and selection suggestions
Rated current and voltage: It is necessary to cover the maximum operating value of the circuit, and FRHV series (such as 100VDC/250VDC) should be preferred for high-voltage scenarios.
Circuit break time (I ² T value): Fast break type is suitable for precision protection, while slow break type is suitable for surge scenarios.
Environmental adaptability: Choose ceramic or automotive grade fuses (such as FHT series) for high temperature scenarios.
Certification requirements: UL, RoHS, AECQ, etc. (such as Schurter series certified by cULus).
Typical brand and model examples
BDTFUSE: BFS0402 series (0402 package, 0.25A~5A).
JDTfuse: JFC06031300FS (0603 package, 3A/32V fast break).
Schurter: 3413.0009.22 (1206 package, 200mA/63V fast break).
For specific model parameters or procurement information, please refer to the specifications provided by the relevant brand official website or authorized agents (such as Hard City and Shichanglong Electronics).
