What are the product categories of SEA&LAND brand?

As a professional brand in the field of circuit protection, SEA&LAND's product matrix is centered around self recovering fuses (PPTC), extending to temperature sensors, fuse holders, and related overcurrent protection components, forming solutions covering multiple scenarios such as consumer electronics, automotive electronics, and industrial control. The following is a systematic summary of the main product categories of land and sea brands:
1、 Self healing Fuse (PPTC) Series
LuHai provides full-size, multi voltage platform self-healing fuses with high polymer temperature coefficient (PPTC) technology as the core, covering both plug-in and surface mount packaging forms:
Plug in self recovery fuse
B series: including models B250, B130, B60, etc., suitable for high current scenarios such as industrial power supplies and battery pack protection.
R series: such as R30 and R60, designed for consumer electronics, balancing cost and performance.
Surface mounted self-healing fuse
Standard packaging: SMD2920, SMD2018, SMD1812, SMD1210, SMD1206, SMD0805, SMD0603, etc., covering full sizes from 0603 to 2920, suitable for automated surface mount production.
Low resistance series: SMD1210L, SMD1206L, SMD0805L, etc., with resistance values as low as m Ω, reducing power consumption and suitable for precision circuits.
High voltage/high current models: such as SMD2018-100-33V (33V/1.1A), SMD1210-035-16V (16V/100A), meet special working condition requirements.
Special fuse for battery cells
SPTL/SFCD/SPT series: designed for lithium battery packs and mobile power banks, providing triple protection against overcharging, overdischarging, and overcurrent.
B Battery Cell Series: Integrated temperature sensor to achieve battery thermal runaway warning.
2、 Disposable fuses and temperature sensors
Disposable fuse
Surface mount fuses: Models 04-100, 06-100, 12-100, etc., comply with UL and CSA certifications, and are used for secondary protection.
Miniature fuses: available in various shapes such as square, cylindrical, ceramic tube, glass tube, etc., suitable for compact space design.
temperature sensor
NTC Thermistor: Provides MF73T high-power type, MF52 bead shaped precision type, etc. for temperature compensation and measurement.
PTC thermistor: used as a temperature switch for motor and transformer overheat protection.
3、 Circuit protection accessories and auxiliary components
Fuse holder
Supporting plug-in fuses, providing multiple installation methods such as plug-in and soldering, to enhance maintenance convenience.
Overvoltage/overcurrent protection components
TVS transient suppression diode: packaged in SOD-123, SMC, SMB, etc., to suppress surge voltage.
ESD electrostatic protector: designed for high-speed signal interfaces such as USB and HDMI, with a protection level of up to 8kV.
GDT ceramic gas discharge tube: used for lightning protection of communication equipment, with a withstand current of 10kA or more.
Varistor (MOV)
Plug in/SMT varistor: absorbs line overvoltage and protects the secondary circuit.
4、 Application Fields and Solutions
Land and sea products are widely used in the following scenarios, providing customized protection solutions:
Consumer electronics: battery management and interface protection for mobile phones, laptops, and smart home devices (such as smart speakers).
Automotive electronics: car charger, BMS battery management system, ADAS controller, certified by AEC-Q200.
Industrial control: PLC, frequency converter, motor driver, capable of withstanding a wide temperature range of -40 ℃ to+125 ℃.
Communication equipment: 5G base station, optical module, to suppress lightning strikes and electrostatic discharge (ESD).
New energy: photovoltaic inverters, energy storage systems, matched with high voltage and high current operating conditions.
5、 Technical advantages and certification
Materials Science: Using polymer composite materials to achieve rapid response (μ s level) and low internal resistance.
Process innovation: lead-free process, laser resistance adjustment to ensure product consistency (± 5%).
Certification system: UL, TUV, CSA safety certification, compliant with RoHS and REACH environmental standards.
SEA&LAND has built a circuit protection ecosystem from components to systems based on PPTC self recovering fuses. Its products are centered around "self-healing, miniaturization, and high reliability" and are widely used in fields with strict security requirements, becoming partners of companies such as Huawei, ZTE, and Panasonic. In the future, with the popularization of the Internet of Things and new energy vehicles, Land and Sea will continue to deepen their layout in the field of low-power and highly integrated protective components.