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A finished populated circuit board assembly with a machined aluminium housing beside a bare multilayer production panel in a white inspection fixture

Network · Group C of five · 5 of 24 sites · verified 2026-09-13

Group C —
electronics manufacturing:
five sites.

The only group whose deliverable is your design: fabrication from 1 to 58 layers, assembly, sensor modules and complete UAV systems.

Send us your Gerber and BOM The full 24-site register
Group C
5
Supplier sites in this capability group, of 24 in the network
Share of network
5/24
Five of the 24 sites; the group spans 1 layer to 58 layers
List ISO 9001
5/5
Counted over this group's own members, not the network total
List RoHS
4/5
Read from each member's own published certification list
List CE
1/5
One of the five lists CE; the other four publish process and quality standards instead

01Group C · identity

From fabrication to a flying system.

5 of 24 sites1–58 layersYour design, their lines

Two large board houses, one prototype-to-mid-volume assembly house, one sensor and radar module maker, one UAV integrator.

A finished populated circuit board for a power supply on a clean bench, with a digital caliper and a strip of component carrier tape
Fig. 01The deliverable is your design. Acceptance class, inspection method and change control are agreed in writing before the first panel is ordered.
A production panel of identical printed circuit boards held in a white inspection fixture P1

Fabrication

1–58 layers HDI, flex, rigid-flex

Saturn PCBA · 0.1 mm trace and space

A close view down one SMT line, with pick-and-place heads and feeder reels in strict alignment P2

Assembly

SMT / DIP / mixed 3D SPI, AOI, X-ray

Whale PCBA · 8 million placements per day

A wide production floor seen from a raised viewpoint, with three rows of identical assembly machinery P3

Proto to volume

No MOQ Same line, both ends

Uppcba · 99.7% first-pass yield

A finished industrial quadcopter UAV on a pale bench with folded propellers and a gimbal payload pod P4

Components & systems

Sensors & radar Complete UAV systems

Kingdta · EMS Drone

Class is a purchase-order decision, not a factory default — the user defines the product classX-ray void criteria belong to IPC-7095, not IPC-A-610

02Group C · the members

Five members, their families and their numbers.

5 sitesFamilies & numbersOutbound links open the site

Throughput, yield and layer counts below are published by the site that carries them. Each one names its own acceptance class.

A bright assembly hall seen down a central aisle between two rows of identical SMT machines
Fig. 02Group C — Electronics manufacturing. 5 independently operated sites, each with its own published numbers.
A production panel of identical printed circuit boards held in a white inspection fixture
Fig. 03Free flying-probe test and AOI on bare boards, laser stencils cut to ±0.003 mm, X-ray void criteria quoted against IPC-7095.
A production panel of identical printed circuit boards held in a white inspection fixture C-01

Saturn PCBA

PCB fabrication and PCBA contract manufacturing from Shenzhen: 1–58 layers, 9 SMT lines, 4–5 DIP lines, 80,000 CPH placement, no MOQ, 60+ countries.

PCB Fabrication 1–58 layers Multilayer & HDI Flex & Rigid-Flex Materials & Finishes SMT Assembly Turnkey & Box Build
In Shenzhen since 1998 1–58 layers 9 SMT + 4–5 DIP lines 80,000 CPH placement

Group C · Electronics manufacturing

A close view down one SMT line, with pick-and-place heads and feeder reels in strict alignment C-02

Whale PCBA

Prototype to mass production — 2–32 layer PCBs, 8 fully automated SMT lines, serving B2B clients across 30+ countries.

PCB Manufacturing SMT Assembly Box Build Assembly Automotive, medical, industrial, IoT & telecom
80,000 m²/month PCB capacity 8 million placements per day 98.7% on-time delivery

Group C · Electronics manufacturing

A wide production floor seen from a raised viewpoint, with three rows of identical assembly machinery C-03

Uppcba

PCB assembly for prototype through mid-volume production, with printing, pick-and-place, reflow, wave, AOI, X-ray and functional test under one roof.

SMT Assembly DIP Assembly Mixed Assembly (SMT + DIP) Box Build DFM Review
20+ years of engineering 10,000+ projects delivered 99.7% first-pass yield

Group C · Electronics manufacturing

An assembly-hall aisle between two rows of identical SMT machines, seen from behind C-04

Kingdta

High-temperature SMD vibration sensors, vibration switches, angle switches and radar modules, with PCB/FPC fabrication and PCBA assembly as a single solution.

Sensor modules: vibration / tilt / optical Radar modules: microwave / BSD / custom PCB fabrication: FPC / multilayer / rigid-flex PCBA services: SMT / DIP / test / coating SMD vibration & angle sensor series
6 SMT lines, 6 DIP lines ±0.03 mm placement accuracy KD1912 rated 5 million cycles

Group C · Electronics manufacturing · Site publishes in Simplified Chinese only.

A finished industrial quadcopter UAV on a pale bench with folded propellers and a gimbal payload pod C-05

EMS Drone

Configurable UAV components, complete systems and engineering support for teams building low-altitude applications.

Flight Control ESC & Power Propulsion Airframe Communication Payload & Kits
18 documents on the published certificate wall 6-step customisation path 4 system architecture layers

Group C · Electronics manufacturing

03Group C · published standards, member by member

Counted over Group C's own five members.

5 / 5 ISO 90014 / 5 RoHS1 / 5 CE0 publish none

5 of 5 list ISO 9001 · 4 of 5 list RoHS · 1 of 5 lists CE · 0 of 5 publish nothing. EMS Drone is the CE and RoHS exception.

A production panel of identical printed circuit boards held in a white inspection fixture C-01

Saturn PCBA

ISO 9001 RoHS
ISO 9001:2015 UL 796 RoHS REACH IPC-A-610 Class 2 & 3 J-STD-001 IPC-A-600 / IPC-6012
A close view down one SMT line, with pick-and-place heads and feeder reels in strict alignment C-02

Whale PCBA

ISO 9001 RoHS
ISO 9001:2015 ISO 14001:2015 IATF 16949:2016 ISO 13485:2016 UL Certified RoHS 3.0 REACH IPC-A-610 Class 3
A wide production floor seen from a raised viewpoint, with three rows of identical assembly machinery C-03

Uppcba

ISO 9001 RoHS
ISO 9001:2015 ISO 13485 IPC-A-610 Class 3 UL Certified RoHS
A finished industrial quadcopter UAV on a pale bench with folded propellers and a gimbal payload pod C-05

EMS Drone

ISO 9001 CE
ISO 9001:2015 (UKAS-accredited) CE DoC (EMC 2014/30/EU) FCC Part 15 Subpart B (VoC)
Five documents, five jobsIPC-A-610 is assembled-board acceptability, J-STD-001 is the soldering process, IPC-A-600 is bare-board acceptability, IPC-6012 is rigid-board qualification, IPC-7711/7721 is rework.
A certified person is not a registered factoryIPC certifies individuals as CSE, CIT or CIS. Facility registration is a separate, site-specific service. Ask which one a supplier means.
Medical and automotive need moreISO 13485 certifies a quality system for medical devices; it is not a product registration. 510(k), PMA or EU MDR remains necessary.
A finished populated circuit board assembly standing on edge with a matte black heatsink across its upper half
Fig. 08Class is a purchase-order decision. Class 2 is the volume default; Class 3 is reserved for the parameters you cannot lose.
Digital calipers closed around a machined aluminium housing beside a blank inspection checklist and a sealed sample bag
Fig. 09Two acceptance documents, one chain. Where the board and the assembly come from different sites, we stitch the traceability together.

04Group C · where these products are catalogued

Where Group C's output is catalogued.

2 categories5 sites behind them

Board work sits in one category and the UAV line in another. The category pages carry the envelope each site is quoted against.

A close view down one SMT line, with pick-and-place heads and feeder reels in strict alignment
Fig. 10Two categories. Board work sits in one category and the UAV line in another, each with its own published envelope.

05Questions Group C buyers ask

Four questions Group C buyers ask.

4 questionsOne contract
Q1 Can I use one house for the bare board and another for assembly? Yes, and it is often the right call — but then two acceptance documents and two traceability chains have to be stitched together, which is the work we do.
Q2 What class should I specify? You must specify it; the standard will not choose for you. With no reliability requirement to argue from, Class 2 is the volume default and Class 3 is reserved for what you cannot lose.
Q3 Will you re-quote if the BOM changes? Yes. Any BOM change re-opens the quotation, because a substituted part can move the process class and the inspection method with it.
Q4 Can I get the Chinese-only site in English? No. Kingdta publishes in Simplified Chinese only; its card above says so. We sit between you and that site and carry the engineering conversation.
A finished populated circuit board assembly standing on edge with a matte black heatsink across its upper half
Fig. 11The decision axis is volume band, not price — prototype, mid-volume with fast DFM, or high-layer fabrication.
Digital calipers closed around a machined aluminium housing beside a blank inspection checklist and a sealed sample bag
Fig. 12Nothing is accepted as a fact. For a published yield we ask what was measured, over what window, and put the answer in the assessment.
An assembly-hall aisle between two rows of identical SMT machines, seen from behind
Fig. 13Go and look. A factory visit can cover several Group C sites in one week, with the line running on your product.
A close macro view of an impedance-controlled board cut edge under laboratory light, held in a plain black fixture
Fig. 14Stackup, impedance and finish are read before production, not argued about after the panels arrive.
A wide empty industrial service corridor in one-point perspective with a painted walkway line running to a closed shutter
Fig. 15Go and look. One week in Shenzhen can cover several Group C sites with your own product running on the line.
Related The 24-site register PCB fabrication & PCBA UAV & drone systems Quality & verification Production follow-up & QC

06Start

Send us your Gerber, BOM and target class.

With fabrication data, a BOM and the acceptance class, the technical read is a same-day item.

Recorded. An engineer will reply.

Written technical assessment, from eric@dfshk.cn.

Book a factory visit eric@dfshk.cn · +86 152 3512 7440