As electronic devices evolve toward miniaturization and higher integration, the spatial constraints of traditional connectors have become a core challenge in industrial design. Kinghelm Electronics' KH-2AF90CB-17 Type-A Female Counterbore Mount Receptacle Connector redefines the balance between spatial efficiency and physical robustness through revolutionary embedded architecture. Featuring an innovative counterbore mounting design, this product deeply embeds the connector body into the PCB substrate, simultaneously breaking through Z-axis physical limitations and constructing a three-dimensional fortress against mechanical stress. It delivers a transformative connectivity paradigm for space-sensitive applications like portable medical devices, industrial controllers, and ultra-thin consumer electronics.

Kinghelm KH-2AF90CB-17 Product Image

The model number itself is a manifesto of miniaturization technology. "KH" carries Kinghelm's technical DNA, symbolizing expertise in precision interconnect solutions; "2A" directly declares its core electrical property – USB 2.0 standard compliance (supporting 480Mbps data transfer) with physical readiness for future protocol upgrades; "F90" dually defines mechanical characteristics: Standard Type-A Female Receptacle interface with 90° horizontal cable orientation, ensuring seamless compatibility with global universal cables while aligning cable bends parallel to the PCB plane; "CB" serves as the exclusive code for counterbore technology, marking its core innovation; "17" precisely quantifies its post-installation height at just 1.7mm, heralding a new era in ultra-thin electronic device design.

The spatial revolution of counterbore architecture forms the product's soul. Where conventional connectors occupy Z-axis space vertically, the KH-2AF90CB-17 employs precision topology optimization to sink its metal housing into a pre-machined PCB cavity. This deep integration achieves breakthroughs in three dimensions: Vertical space compression to an extreme height of 1.7mm – a 60% reduction compared to standard Type-A interfaces (typically ≥4mm) – opens integration pathways for millimeter-space devices like smartwatches, AR glasses, and wearable medical patches; Horizontal space optimization via the 90° cable exit frees PCB edge areas, avoiding spatial conflicts with peripheral components; Mechanically, it creates a "dovetailed interlock" between housing and PCB substrate, expanding solder joints from planar to three-dimensional anchoring. External forces applied to the interface dissipate through embedded sidewalls into the entire PCB base, boosting lateral impact resistance by 300% and decisively solving chronic industry issues like port loosening and pad tearing in portable devices.

Industrial-grade reinvention of USB 2.0 performance demonstrates its reliability philosophy. At the 480Mbps transmission layer, this connector achieves ultimate robustness: Signal integrity is enhanced through ultra-short pin routing (<1.5mm typical) enabled by counterbore structure and ground-plane encircling layout, suppressing crosstalk to industrial-control standards; Power delivery capability exceeds base specifications – VBUS pins utilize widened copper cores with selective gold plating to sustain 1.5A continuous current (50% above standard), enabling streamlined solutions for data acquisition modules and portable printers without external power; Environmental endurance breaks new ground via the dust-resistant nature of embedded construction and optional IPX4-rated sealing rings, with operational temperature extended to -40℃~+85℃ to meet extreme conditions in cold-chain logistics terminals and outdoor industrial equipment.

Micron-scale manufacturing precision is the technical cornerstone enabling the 1.7mm ultra-low profile. Precision phosphor bronze housings are formed through progressive die stamping, maintaining wall thickness within 0.2mm±0.02mm tolerance while ensuring deformation resistance and lightweight construction; PCB counterbore machining supports 0.8~1.6mm board thickness customization with ±0.05mm depth accuracy, guaranteeing seamless surface alignment post-installation; Micro-soldering innovations employ proprietary reflow profiles with nitrogen shielding to eliminate bridging risks in fine-pitch terminations, with solder joint pull-test values consistently exceeding 5N – surpassing JIS-C-5402 industrial standards.

Deep-engineered anti-vibration architecture embodies its industrial-grade DNA. A four-dimensional anti-vibration mechanism operates synergistically: Four main alignment posts penetrate the PCB to form mechanical riveting; Sixteen signal pins feature "dual-L shaped" solder legs creating elastic buffering across XYZ axes; The contact system innovates with angular dual-beam contacts maintaining constant pressure during vibration; Nylon PA66 insulators embed metal reinforcements to efficiently divert mating stresses from solder joints; Housing sidewalls incorporate micron-scale elastic barbs forming interference fits with PCB cavity walls, eliminating metal-on-metal noise from high-frequency micro-vibrations. After 2,000 violent mating cycles, zero pad failures occur.

Kinghelm KH-2AF90CB-17 Specification

This connector's applications focus precisely on dual extremes of space and reliability: In medical electronics, it serves as data ports for implantable device recorders, handheld ultrasound probes, and insulin pumps – counterbore structure prevents skin compression injuries; For industrial IoT, DIN-rail controllers, explosion-proof handheld terminals, and AGV navigation modules leverage its vibration resistance for uninterrupted production; At consumer electronics' cutting edge, folding-screen phone hinge modules, TWS charging cases, and ultra-thin e-readers utilize its 1.7mm height to breach physical thickness barriers; In transportation equipment, rail transit ticket machines, vehicular black boxes, and aircraft seat entertainment systems employ concealed interfaces to prevent accidental passenger impacts.

Kinghelm's KH-2AF90CB-17 transcends being merely a connector – it represents a paradigm shift in miniaturization and reliability. Shattering physical boundaries through counterbore architecture and redefining mechanical logic via three-dimensional soldering, it constructs an indestructible fortress within a 1.7-millimeter microcosm. As electronics evolve from "slim" to "invisible" and from "durable" to "impervious," such millimeter-scale technological breakthroughs form the invisible backbone driving future device evolution.

About Kinghelm

Shenzhen Kinghelm Electronics Co., Ltd.（www.kinghelm.net）has technical backbones from Tsinghua University and UESTC, and has introduced overseas returnee professionals. Kinghelm is able to develop highly reliable and high-performance antenna and connector products.KH series products of "Kinghelm" brand include Beidou/GPS antennas, RF adapter connectors, plug connector, electrical data connectors, terminals, and customized vehicle harnesses, industrial / medical connectors, and special antenna connectors."Kinghelm connects world", Kinghelm has grown with the development of China's Beidou industry. Starting from supplying Beidou/GPS dual mode antennas, IPEX terminals, and RF adapter cables for automotive manufacturers, Kinghelm has continuously developed products. Currently, it has a series of WiFi, Bluetooth, NB-loT, LoRa, Zigbee, UWB, and GSM antennas, RFID tags, RF adapter cables, standard microwave antennas, vehicle grade SMA, SMB, FAKRA holders, coaxial cables, and can customize non-standard antenna connectors based on customer drawings or samples.