Sionics

What Sionics does

Sionics Ltd is a UK-based contract electronic manufacturing services (EMS) provider specialising in PCB Assembly (PCBA). Founded in 2000 by Simon Coulson, who has been designing printed circuit boards since 1985, the company operates a single production facility in Newmarket, Suffolk, with approximately 10-15 employees. Its core offering is contract electronics manufacturing from prototype (minimum order value £150, single-unit runs) through to high-volume production, delivered on a quote-based, BOM-driven sales model to UK and international customers.

The company runs four SMT production lines equipped with Samsung SM321, SM411F, SM482, and Juki 2070L pick-and-place machines, Heller and Pyramax reflow ovens, and an Asscon VP1000 Vapour Phase oven for temperature-sensitive components. Quality is enforced through dual AOI platforms (Nordson Yestech BX, MEK Power Spector), a Xavis XScan A100R X-ray system for BGA and hidden solder joint inspection, Nordson ASYMTEK SL-9240 conformal coating (installed November 2024), and ERSA HR550 rework and Mobile Scope optical inspection (added January 2025). The firm holds ISO 9001:2015 and ISO 13485 certifications, with IPC Class 2 as standard and Class 1 or 3 on request. A proprietary component database of 17,000+ SKUs backed by 400+ suppliers supports procurement efficiency.

Sionics operates a horizontally segmented, sales-led GTM with no external marketing channels of note, using phone, email, and a BOM-upload enquiry form as primary intake. Revenue streams comprise project-based PCBA, turnkey assembly (component sourcing plus assembly plus programming plus testing plus rework), cable and wire harness assembly, conformal coating, and full box build. The company is privately held and founder-controlled, with no external funding rounds, M&A activity, or public listing disclosed, and reinvestment has been concentrated in extending production capability rather than in sales or geographic expansion.

Name

Sionics

Legal name

Sionics Ltd

Website

https://sionics.co.uk

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

Sionics is a UK-based contract electronics manufacturer specialising in PCB Assembly (PCBA) for prototype-to-production runs. Operating four SMT lines from its Newmarket, Suffolk facility, the company serves electronics OEMs, R&D teams, and system integrators across the UK and internationally.

Ownership category

akta.pro rank

Product category

Electronic Manufacturing Services

NAICS

Printed Circuit Assembly (Electronic Assembly) Manufacturing (334418), Semiconductor and Other Electronic Component Manufacturing (3344)

SIC

Printed Circuit Boards (3672), Electronic Components, Nec (3679)

akta.pro primary industry

PCB Assembly (PCBA/EMS) (HDAHAOAI)

Keywords

• PCB assembly services
• Electronic manufacturing services
• SMT assembly
• Through-hole assembly
• Conformal coating

Headquarters

HQ city

Newmarket

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Technology or R&D, Infrastructure, Operations

Revenue model

1. PCB Assembly Services (PCBA): Full-service PCB assembly including SMT, through-hole, mixed technology, and flex PCBs. Services range from prototype (1 unit minimum) to high-volume production. Revenue is project-based, generated through assembly fees, component procurement margins, and testing/rework services.
2. Turnkey Assembly: Full turnkey services including component sourcing/procurement, assembly (SMT/THT), board programming, testing, and rework. Revenue generated through procurement fees and assembly service charges.
3. Cable Assembly: Custom cable assembly, wire preparation, and wiring looms services. Can be standalone orders or integrated with PCB assemblies.
4. Box Build Services: Full box build services for complete electronic assemblies and products.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels1 record

Core offering

Sionics is a contract electronic manufacturing services provider that designs and manufactures PCB electronic assemblies. It delivers full turnkey PCB Assembly (PCBA) — including component sourcing, SMT and through-hole placement, conformal coating, inspection (AOI and X-Ray), board programming, functional testing, rework, cable assembly, and full box build — across four SMT production lines, scaling from single-unit prototypes to high-volume production runs for UK and international electronics customers.

Product overview

Sionics is a contract electronic manufacturing services (CEMS) provider offering a unified portfolio of PCB assembly and related services. The core offering centres on PCB Assembly (PCBA) supported by four SMT production lines, with specialised capabilities in conformal coating (using the Nordson ASYMTEK SL-940), cable assembly, inspection (AOI and X-Ray), testing (board programming and functional testing), rework and repair, plus full turnkey assembly and box build services. The company scales from prototype quantities (as low as 1 unit) to high-volume production runs, serving industries including automotive and harsh-environment applications.

Differentiator

Problem solved

Functional benefit

Products and services

• PCB Assembly (PCBA) Contract PCB assembly service supporting SMT, through-hole (THT), mixed, and flex PCB technologies with precision placement of 01005 components and micro BGAs; scales from prototype (1 unit) to high-volume production for electronics manufacturers.
• Conformal Coating Protective conformal coating service using the Nordson ASYMTEK Select Coat SL-940 system to apply coating that protects PCBs against moisture, dust, chemicals, and extreme temperatures for harsh-environment applications.
• Cable Assembly Custom cable and wire harness manufacturing service including custom wiring, cable preparation, and wiring looms, from single prototypes to full-scale production; available standalone or combined with PCB assembly.
• Inspection Services Quality inspection service using Automated Optical Inspection (AOI) and X-Ray inspection systems to detect defects, hidden solder joints, misalignment, and bridging, including for complex components such as BGAs.
• Testing Services PCB testing service including board programming and functional testing to verify connectivity and end-to-end functionality, reducing defects and ensuring reliable real-world performance.
• Rework and Repair Component removal, replacement, and repair service for complex PCBs using advanced rework stations, performed by skilled technicians to minimise impact on surrounding areas.
• Full Turnkey Assembly Complete turnkey PCB assembly service encompassing component sourcing and procurement, SMT and THT assembly, board programming, testing, and rework.
• Full Box Build Complete box build service for full product assembly beyond PCB fabrication, combining PCB assemblies, cable/wiring, and final integration for OEMs and system integrators.

Quantifiable outcome

• 300+ unique customers served to date
• +3 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators7 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Neways Electronics: Dutch-based EMS provider offering PCB assembly, box build, and full product lifecycle services for industrial and medical customers. Comparable in vertical mix (medical, industrial) and EMS service offering but operates at considerably larger scale.
• TT Electronics: UK-headquartered global electronics manufacturer with significant EMS/PCBA operations across multiple geographies. Overlaps with Sionics in PCBA and box build but operates at much larger scale across multiple product lines and markets.
• Scanfil UK: UK operations of Finnish EMS group Scanfil, offering contract electronics manufacturing including PCB assembly and box build. Overlaps with Sionics in PCBA services but operates at significantly larger scale across multiple sites.

Regional players

• Variosystems: Swiss-headquartered EMS provider with European footprint offering PCB assembly, cable assembly, and box build. Comparable service offering and customer segments but operates primarily in continental Europe rather than competing directly in the UK.

Direct peers

• Custom Interconnect: UK-based contract electronics manufacturer specialising in PCB assembly, cable and harness assembly, and box build for aerospace, medical, and industrial customers. Closely comparable capability set and customer verticals to Sionics.
• Axiom Manufacturing Services: UK-based contract electronics manufacturer providing PCB assembly, prototyping, and full box build services. Comparable in customer type (UK industrial OEMs), scale, and service portfolio to Sionics.
• NOTE UK: UK operation of Swedish EMS group NOTE AB, offering PCB assembly, box build, and NPI services to industrial customers. Directly competes for similar prototype-to-volume PCBA work in the UK market.
• Chemigraphic: UK-based contract electronics manufacturer offering PCB assembly, box build, and prototyping services to OEM customers. Directly comparable to Sionics in scope (PCBA-focused, mid-sized, UK-based) and customer profile (industrial and medical OEMs).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sionics-limited

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sionics