PCB & PCBA Assembly Service — Turnkey PCB Fabrication, SMT Assembly & Electronic Component Sourcing

PCB & PCBA Assembly Service — From Bare Board to Fully Tested Assembly, One Supplier

Keszoox delivers a complete turnkey PCB and PCBA solution — from bare board fabrication and component sourcing through SMT placement, reflow soldering, through-hole assembly, functional testing, and global shipment. Whether you need a 5-piece prototype or a 50,000-unit production run, our vertically integrated manufacturing capability and in-house component warehouse eliminate the coordination overhead of managing multiple vendors. One RFQ, one purchase order, one delivery.

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Service Overview — Four Tiers of PCB & PCBA Support

Service Tier	What's Included	Typical Lead Time	Best For
PCB Fabrication Only	Bare board manufacturing to your Gerber files; FR4, Rogers, aluminum, flex, rigid-flex	3–7 days	Engineers who source and assemble components themselves
Partial Turnkey PCBA	PCB fabrication + SMT/THT assembly; customer supplies components	5–10 days	Teams with existing component inventory
Full Turnkey PCBA	PCB fabrication + full component sourcing + assembly + testing	7–15 days	Startups, NPI teams, and production buyers who want zero procurement overhead
Box Build / System Integration	Full turnkey PCBA + enclosure assembly, cable harness, final system test	10–20 days	OEM and ODM customers requiring complete finished units

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PCB Fabrication Capabilities

Board Materials & Layer Count

Parameter	Standard Capability	Advanced Capability
Layer count	1–8 layers	Up to 32 layers
Board material	FR4 (Tg 130–170°C)	Rogers 4003C/4350B, polyimide, aluminum, PTFE
Board thickness	0.4mm – 3.2mm	0.2mm – 6.0mm
Copper weight	1 oz (35µm)	0.5 oz – 6 oz (17µm – 210µm)
Min trace / space	4 mil / 4 mil	2 mil / 2 mil (HDI)
Min drill size	0.3mm mechanical	0.1mm laser (blind/buried via)
Surface finish	HASL (lead-free), ENIG	ENEPIG, OSP, immersion silver, immersion tin, hard gold
Solder mask	Green, red, blue, black, white, yellow	Matte black, matte green, transparent
Silkscreen	White, black	Any color on request
Special features	Controlled impedance, back-drill	Embedded components, via-in-pad, cavity board

Flex & Rigid-Flex PCB

• 🟡 Flexible PCB (FPC) — Polyimide base; 1–4 layers; min bend radius 1mm; ZIF connector compatible
• 🟠 Rigid-flex PCB — Combined rigid FR4 and flexible polyimide zones; up to 8 layers; ideal for wearables, aerospace, and medical devices
• 🔵 Aluminum-base PCB — 1–2 layers; 1W/m·K – 3W/m·K thermal conductivity; LED lighting and power electronics

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SMT & Through-Hole Assembly Capabilities

Assembly Type	Capability	Notes
SMT placement	0201 (0.6×0.3mm) to large QFP/BGA	High-speed pick-and-place; ±25µm placement accuracy
BGA / µBGA	Pitch ≥ 0.3mm; X-ray inspection standard	Rework station available for BGA replacement
QFN / LGA	Exposed pad packages; AOI + X-ray verification	Void rate < 5% on thermal pads
Through-hole (THT)	Manual and wave soldering; axial, radial, DIP, connectors	Mixed SMT+THT boards supported
Press-fit connectors	Controlled press-fit insertion force	Backplane and high-reliability connectors
Conformal coating	Acrylic, silicone, polyurethane, epoxy	Selective or full-board coating; IPC-A-610 Class 2/3

Soldering Processes

• 🔥 Lead-free reflow soldering — SAC305 solder paste; nitrogen atmosphere available; peak temperature profile per IPC-7711
• 🌊 Wave soldering — Lead-free wave; selective wave for mixed assemblies
• 🔬 Selective soldering — Robotic selective soldering for through-hole components on SMT-populated boards
• ✨ Hand soldering — IPC-certified technicians; fine-pitch rework; BGA reballing

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Component Sourcing for PCBA — Integrated with Our Warehouse

Unlike pure EMS providers who outsource component procurement, Keszoox operates its own component warehouse stocking millions of part numbers — IC chips, passive components, connectors, MOSFETs, and power management ICs. This means:

• ⚡ Faster BOM fulfillment — Most components shipped from our own stock; no waiting for distributor lead times
• 💰 Lower total cost — Direct stock eliminates distributor markup on common components
• 🔍 Verified authenticity — Every component passes our incoming QC before placement; zero counterfeit risk
• 📄 Full traceability — Lot codes, date codes, and CoC documents for every component on your BOM
• 🔄 Alternate sourcing — Hard-to-find or EOL components sourced through our global supply network

Component Category	In-House Stock	Sourcing Lead Time
IC chips (MCU, analog, logic, memory)	Millions of part numbers	Same day – 3 days
Passive components (R, C, L)	All standard values and packages	Same day
MOSFETs, transistors, diodes	All common types and packages	Same day – 2 days
Connectors (JST, Molex, DuPont, USB)	Full range stocked	Same day
Power management ICs (PMIC, DC-DC, LDO)	Major brands stocked	Same day – 3 days
Hard-to-find / EOL / allocated parts	Global sourcing network	3–10 days

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Quality Control — IPC-A-610 Compliant, Seven-Stage Inspection

Stage	Method	What It Catches
1. Incoming component inspection	Visual + parametric testing on ATE	Counterfeit, out-of-spec, wrong value/package
2. Solder paste inspection (SPI)	3D SPI machine; 100% coverage	Insufficient paste, bridging, misalignment before placement
3. Post-placement inspection	Vision system on pick-and-place	Missing, misaligned, or wrong components before reflow
4. Automated optical inspection (AOI)	Post-reflow AOI; top and bottom	Solder bridges, tombstoning, missing components, polarity errors
5. X-ray inspection	2D/3D X-ray for BGA and QFN	Hidden solder joints, voids, cold joints under packages
6. In-circuit test (ICT)	Bed-of-nails or flying probe	Open circuits, short circuits, wrong component values
7. Functional test (FCT)	Customer-defined test fixture or JTAG	Board-level functional verification against specification

• 🏆 IPC-A-610 Class 2 standard — Default for commercial electronics
• 🚗 IPC-A-610 Class 3 available — For automotive, medical, and aerospace applications
• 📊 First Article Inspection (FAI) — Full dimensional and functional report on first production units
• 🧾 Certificate of Conformance (CoC) — Included with every shipment

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Why Choose Keszoox for PCB & PCBA?

#	Advantage	What It Means for You
01	Technical Datasheet & DFM Review	Free Design for Manufacturability review on every new project — catch issues before production
02	100% Original Components	All components sourced from authorized channels; zero-tolerance counterfeit policy; CoC included
03	PCB & PCBA Under One Roof	Bare board fab and assembly in one facility — no inter-vendor delays, no finger-pointing
04	Chip Replacement & BOM Optimization	We identify lower-cost or better-availability alternates for your BOM without compromising performance
05	In Stock Components, Fast Delivery	Own warehouse eliminates component lead time; prototype delivery in as fast as 5 days
06	Strict 7-Stage QC	SPI + AOI + X-ray + ICT + FCT — every board verified before shipment
07	Dedicated Technical Support	Engineering team for DFM, DFT, component selection, and production ramp support
08	After-Sales & Warranty	Full replacement guarantee; dedicated account manager; post-delivery technical support

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How to Get a Quote — Three Steps

1. Send Your Files — Gerber files (RS-274X), BOM (Excel/CSV), pick-and-place file, and any special requirements
2. Receive Your Quote — Detailed quote within 24 hours covering PCB fabrication, component costs, assembly, and shipping
3. Approve & We Build — Confirm the order; we procure, fabricate, assemble, test, and ship — with full tracking

Project Type	Quantity	Typical Lead Time	Service
Prototype	1–10 pcs	5–7 days	Full turnkey; expedite available
NPI / Pilot	10–100 pcs	7–12 days	Full turnkey + FAI report
Small production	100–1,000 pcs	10–15 days	Full turnkey + ICT + FCT
Volume production	1,000–50,000 pcs	15–25 days	Dedicated line + VMI + CoC

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Industries Served

Industry	Typical PCBA Projects	Key Requirements
Consumer Electronics	IoT modules, smart home devices, wearables, audio equipment	Cost efficiency, fast NPI, compact form factor
Industrial Automation	PLC boards, motor controllers, HMI panels, sensor modules	IPC Class 2/3, wide temperature range, long lifecycle
Automotive Electronics	ECU boards, ADAS modules, EV battery management systems	AEC-Q100/Q200 components, IATF 16949, PPAP
Medical Devices	Patient monitoring, diagnostic equipment, implantable device boards	IPC Class 3, ISO 13485, full traceability
Telecommunications	5G base station boards, optical transceiver modules, routers	High-frequency PCB, controlled impedance, BGA assembly
Aerospace & Defense	Avionics boards, radar modules, satellite subsystems	MIL-spec, IPC Class 3, hermetic packaging

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Frequently Asked Questions

What files do I need to submit for a PCBA quote?

You need: Gerber files (RS-274X format), a BOM in Excel or CSV (with part numbers, quantities, and reference designators), and a pick-and-place (centroid) file. Assembly drawings and special instructions are helpful but not mandatory for a preliminary quote.

Can you do a DFM review before production?

Yes. Every new project receives a free Design for Manufacturability (DFM) review. We check pad sizes, clearances, component orientation, panelization, and testability before cutting a single board.

Do you support mixed SMT and through-hole assemblies?

Yes. We handle mixed technology boards with SMT on one or both sides plus through-hole components, using a combination of reflow, wave, and selective soldering as required by the design.

Can you source components for my BOM if I don't have them?

Yes. Full turnkey service includes complete component sourcing from our own warehouse and global supply network. We also offer BOM optimization — identifying lower-cost or better-availability alternates for hard-to-find parts.

What is your minimum order quantity for PCBA?

MOQ is 1 piece for prototype assembly. No artificial MOQ for R&D and NPI projects. Volume pricing applies from 100 pieces upward.

Do you offer functional testing?

Yes. We support ICT (in-circuit test) with bed-of-nails or flying probe fixtures, and functional test (FCT) using customer-supplied test fixtures or JTAG boundary scan. Test coverage report included.

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

Not satisfied? Return any item within 90 days of purchase for a full refund or exchange. Items must be in original condition.

We are committed to quality, reliability, and customer satisfaction. Every product is carefully selected and tested to meet the highest standards.