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Bel Fuse

Cinch micro-D connectors for dense cryostat DC wiring

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Where it fits in a quantum computer

Japan’s September 2025 supply-chain roadmap for superconducting quantum computers names Cinch Connectivity Solutions, part of Bel Fuse’s Connectivity Solutions group, with TE as a known maker of the micro-D-sub connectors sometimes used for higher-density DC lines inside dilution refrigerators. Cinch published a January 29, 2026 article on interconnect design for quantum computing that stresses non-magnetic materials and reliability at cryogenic temperatures.

What the evidence establishes

Lab & test products

Partner-disclosed: the AIST–RIKEN–Fujitsu–NEC roadmap names Cinch among micro-D connector makers, and Cinch’s own blog discusses quantum-computing interconnects.

A documented cryogenic, vacuum, microwave or test-and-measurement product used in physics labs or electronics test. Adoption in quantum computers is not established by the cited source.

Component roleCinch micro-D connectors for dense cryostat DC wiring
EvidencePartner-disclosed: the AIST–RIKEN–Fujitsu–NEC roadmap names Cinch among micro-D connector makers, and Cinch’s own blog discusses quantum-computing interconnects.
How we knowPartner-disclosed A named partner, customer or platform owner’s document names the company. The scope is that document’s system or program, not a general supply relationship.
Primary sourceBel Fuse — 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

Neither source names a quantum customer or a dedicated cryogenic product; Cinch’s article is general design guidance featuring its standard RF connectors, so this is a documented product category rather than an established supply relationship.

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.

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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