InfiniBand/fibre optic cable QSFP BlueOptics JH234A-BL Male/Male

The BlueOptics JH234A-BL is a 1‑metre QSFP to QSFP direct attach cable designed for short-reach, high-speed links in data centers and rack environments. Implemented as a passive 40GBase‑CR4 twinax copper assembly with 30 AWG conductors and QSFP male connectors on both ends, the cable supports 40 Gbps electrical signalling for Ethernet, Fibre Channel and InfiniBand on short distances. Manufactured to MSA guidelines, it is intended as a compatible solution for systems that support the referenced 40GBase‑CR4 QSFP direct attach form factor.

Advantages

The cable provides a compact and low-latency physical connection for adjacent rack and intra-rack links while consuming negligible power because it is a passive twinax DAC. MSA-compliant mechanical and electrical characteristics ensure interoperability with major switches, routers and storage platforms that accept QSFP DACs. Use of quality cable materials and components supports predictable performance and long operational life in high-density network installations.

Suitable for

• Short-reach 40G links between switches and aggregation devices
• Server-to-switch and switch-to-switch connections within and between adjacent racks
• High-performance computing and InfiniBand fabric interconnects operating at 40G
• Fibre Channel and Ethernet links requiring QSFP/40G DAC connectivity

Key specifications

• Connector type: QSFP male to QSFP male
• Data rate supported: up to 40 Gbps
• Length: 1 metre (approx.)
• Cable type: passive twinax copper (DAC), 30 AWG conductors
• Standards: QSFP MSA compatible, designed for 40GBase‑CR4 applications
• Power consumption: passive (negligible additional power)

How to use

Install the QSFP BlueOptics JH234A-BL by inserting each QSFP male connector into the QSFP port of the devices to be linked, ensuring firm seating and latch engagement. Confirm that both devices support passive QSFP DACs and the 40GBase‑CR4 electrical interface before connecting. Once connected, verify link status and negotiated speed on the network equipment. For best results, route the cable without sharp bends and avoid mechanical stress at the connector ends.

Recommendations

Use this passive QSFP DAC for short, direct connections within racks or between adjacent racks where a 1‑m 40G link is required. Avoid using passive twinax DACs for longer spans or applications that explicitly require active optics. Maintain cable bend radius and secure cables to prevent accidental strain on QSFP connectors.