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COMPANY RESEARCH / 6806.T

Hirose Electric

NbTi multi-coax connector cables for quantum (Hirose SER)

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Where it fits in a quantum computer

Its group company Hirose SER sells custom multi-channel coaxial connector cables for quantum computing, using NbTi coax, non-magnetic parts and solderless compression mounting to carry DC to 40 GHz from narrow-pitch multichannel connectors at cryogenic temperatures; an 8-channel example is characterized at 4 K and 300 K. SER’s company history says it developed the quantum multi-coax connector in 2021 and became a Hirose Electric group company in 2025.

What the evidence establishes

Quantum-computing evidence

Positioning: Hirose SER’s product page offers multi-coax connector cables for quantum computers, and its history page records joining the Hirose Electric group in 2025.

An explicit quantum-computing product, design-in, supply role, program or partnership, such as a part sold for quantum computers or a named quantum-computer customer. For a maker, it means the company’s own quantum computers or processors. This does not establish revenue, market share, volumes or future sourcing.

Component roleNbTi multi-coax connector cables for quantum (Hirose SER)
EvidencePositioning: Hirose SER’s product page offers multi-coax connector cables for quantum computers, and its history page records joining the Hirose Electric group in 2025.
How we knowPositioning A dedicated quantum-computing product or reference design, with no named customer. Marketed for quantum computers; not a disclosed design win.
Primary sourceHirose Electric — supporting disclosure
Company or official disclosure; vendor claims are attributed to their source.
Checked. This is the research review date, not the source publication or quote time.

Keep in perspective

The ownership rests on SER’s own history page (a Hirose Electric group company since 2025), which does not state the size of the stake. No customer or volume is named, and the product is custom-made.

Diversified business exposure. This describes the breadth or role of the business; it is not an investment rating. A quantum-computing product, design-in or partnership does not by itself establish material quantum revenue, market share, or future returns.

Connections to the assembly

These links explain the technology relationship. The model is illustrative and does not represent an actual manufacturer’s bill of materials.

Flex cables

Flexible ribbons carrying dozens of microwave or DC lines side by side on a thin film, a denser alternative to individual coaxial cables.

Scope of the company links: High-density wiring that carries many lines per cable or ribbon. Printed flex ribbons come from private firms: Delft Circuits’ Cri/oFlex (eight NbTi or silver striplines per 0.3 mm flex with built-in attenuators and filters, sold with Bluefors) and Maybell’s LF CryoTrace, based on an MIT Lincoln Laboratory design it licensed (MIT News, June 2026). Huber+Suhner is mapped for its MXP multicoax system (192 flexible or semi-rigid coax channels on an ISO 100 flange, running to the mixing chamber), Hirose for its SER unit’s NbTi multi-channel coax connector cables and QTREX for printed high-density interconnects in development; these are coax harnesses rather than printed ribbons. Bluefors’ High-Density Wiring (up to 168 lines per port) is private. Rigetti’s 10-K says Quanta Computer may develop flexible cables under a 2025 collaboration, a possibility rather than a disclosed product, so Quanta is not mapped here.

Connectors & feedthroughs

Miniature coaxial connectors at every stage and hermetic feedthroughs in the top plate that carry the lines out of the vacuum without leaking.

Scope of the company links: SMA connectors dominate between stages, smaller non-magnetic SMP or SMPM connectors sit near the chip, and hermetic feedthroughs seal the vacuum can. Huber+Suhner sells non-magnetic SMA connectors, hermetic bulkhead adapters and multicoax connectors for quantum computing; the AIST roadmap says JAE’s non-magnetic SMPM connectors are almost the only option at that size; QuantumCTek sells vacuum-hermetic adapters; Hirose’s SER unit sells NbTi multi-coax connectors for quantum computers; and TE and Bel Fuse’s Cinch are named as makers of micro-D connectors used for dense DC wiring, a generic role. Private suppliers include Rosenberger (non-magnetic SMP, widely used in Japanese labs), Fischer (hermetic DC connectors), Radiall and CryoCoax.

Related research

Companies with overlapping sector exposure. Their products and evidence may differ; this is not a list of equivalent investments.

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