Cosmo (冠西) Products

Browse our comprehensive range of Cosmo electronic components. As a core distributor, we provide genuine products with technical support and competitive pricing.

Product Categories

Photocouplers (Optocouplers)

High-performance photocouplers for signal isolation including transistor output, Darlington, triac, ...

Solid State Relays (SSR)

High-reliability solid state relays for AC and DC switching with MOSFET and Triac outputs....

Reed Relays

High-quality reed relays and reed sensors for switching and sensing applications with hermetically s...

Automotive Photocouplers

AEC-Q100 qualified photocouplers for automotive applications including BMS and charging systems....

Frequently Asked Questions

What types of photocouplers does Cosmo offer?

Cosmo offers various types of photocouplers including: transistor output (K1010, K2010 series), Darlington output (KP5010 series), triac output (KMOC304x, KMOC305x, KMOC308x series), and high-speed types (KPC6N138, KPC450x series). Each type is designed for specific applications with different CTR, isolation voltage, and speed requirements.

Select output type based on your application requirements.

photocoupler types transistor output Darlington triac
What are the key specifications to consider when selecting a Cosmo SSR?

Key specifications for Cosmo SSRs include: load voltage (60V to 600V), continuous load current (100mA to 400mA), on-resistance, turn-on/off time, and isolation voltage. MOSFET output SSRs like KAQY series provide low on-resistance and fast switching, suitable for DC applications. Contact BeiLuo FAE for selection guidance.

Match voltage, current, and switching speed to your application.

SSR selection solid state relay specs load voltage load current
What is the isolation voltage of Cosmo photocouplers?

Cosmo photocouplers provide high isolation voltages ranging from 2500Vrms to 5000Vrms, depending on the model. Standard devices typically offer 2500V or 3750V isolation, while high-isolation models provide up to 5000V. This ensures safe signal isolation in high-voltage applications.

Select isolation voltage based on your safety requirements.

isolation voltage Vrms safety isolation
What packages are available for Cosmo products?

Cosmo products are available in various packages including: DIP (Dual In-line Package) for through-hole mounting, SOP/SMD (Small Outline Package) for surface-mount applications, and SSOP for compact designs. Popular packages include DIP4, DIP6, DIP8, SOP4, SOP6, and SSOP4. Contact BeiLuo for package availability.

Choose package based on mounting method and space constraints.

DIP package SOP package SMD surface mount
How do I determine the CTR (Current Transfer Ratio) requirement?

CTR is relates to output current to input current, expressed as a percentage. Higher CTR means better efficiency. Cosmo offers standard CTR (50-600%), high CTR (100-300%), and very high CTR options. Consider your drive capability and load requirements when selecting CTR. Contact BeiLuo FAE for CTR selection guidance.

Higher CTR reduces input current requirements.

CTR Current Transfer Ratio photocoupler efficiency