Hongkong Hjs Electronic Co., Ltd.

Based in China, Hongkong Hjs Electronic Co., Ltd. lists five distinct power supply items in its catalogue. The supplier focuses on electric power supply components and switched‑mode power supplies (SMPS). Its product list includes a rainproof 12 V DC adapter rated at 2 A, a CCTV power supply providing 12 V DC at 30 A with 18 channels, a universal 12 V DC supply rated at 250 W, an LED‑specific power supply, and a 36 W switching adapter delivering 12 V DC at 3.0 A. Each item is described by output voltage, current or power rating, which are standard identification parameters for DC power modules.

In the broader market, DC power adapters of 12 V are commonly built as SMPS with efficiency levels above 85 % and voltage regulation within ±5 %. Typical safety standards include IEC 60950‑1 for information technology equipment and IEC 62368‑1 for audio‑visual and communication devices. While the catalogue does not specify HS codes, products of this type usually fall under HS Chapter 85, heading 8504 for static converters. Buyers often look for CE, UL, or RoHS compliance documentation to confirm conformity with European and North American regulations.

Hongkong Hjs Electronic Co., Ltd. offers five DC power solutions: a rain‑proof 12 V DC adapter (2 A), a high‑current CCTV supply (12 V DC, 30 A, 18‑channel), a universal 12 V DC unit capable of 250 W output, an LED‑optimised power supply, and a 36 W switching adapter (12 V DC, 3 A). All products are designed as switched‑mode converters and use plastic housings with internal copper windings.

In the power‑supply market, 12 V DC adapters are typically rated in classes such as IEC 60950‑1 Class A or Class B, with output ripple below 120 mV p‑p and protection features like over‑voltage, over‑current, and short‑circuit shut‑off. LED drivers often require constant‑current regulation and may include dimming interfaces such as PWM. Efficiency grades of 80‑95 % are common, and manufacturers frequently certify units to CE, UL, FCC Part 15, and RoHS for lead‑free compliance.