Dell DAC-Q28-100G-1M Compatible 100G QSFP28 Passive Copper Twinax Cable 1m(3ft) Bulk Wholesale | HYTOPTODEVICE

For detailed technical specifications, please refer to the Datasheet

Usage Guidelines & Best Practices

• Mandatory Port Setting: Host QSFP28 port must enable 100GBASE-CR4 mode; link negotiation failure will happen if forced to optical mode.

• Cabling Requirements: Do not exceed the minimum 35mm bend radius, avoid sharp folding, heavy extrusion or long-term tension on the cable assembly.

• Port Installation Standard: Works only with standard QSFP28 100G ports; cannot be inserted into SFP+ or XFP slots. Disable the host’s third-party transceiver lock policy in advance if required.

• Maintenance Specification: Hot‑swap supported, grip the pull tab instead of pulling the cable body during plug/unplug to prevent internal conductor damage.

• Testing & Storage: Run sample validation on target hardware before large bulk deployment; store spare cables in dry, dust‑free and anti‑static packaging.

For detailed operation instructions, please refer to the User Guide.

Full Compatibility List & Supported Devices

1. Validated Dell Hardware & Firmware

• Dell PowerSwitch S5248F-ON, S5232F-ON 100G leaf switches
• Dell PowerSwitch Z9264F-ON high-performance spine switches
• Dell PowerEdge servers with QSFP28 100G network adapters

2. Multi-Brand Cross Interoperability

Built on universal MSA open standards, this 100G QSFP28 passive copper twinax cable can interoperate with mainstream network brands including Arista, H3C, Juniper, Dell, NVIDIA Mellanox and more, for mixed-vendor rack stacking and server fabric expansion.

3. Free Value-Added Services

• Dell PowerSwitch leaf-spine 100G fabric intra-rack interconnection
• Short-range links between storage arrays and Dell top-of-rack switches
• Direct replacement for original Dell DAC-Q28-100G-1M 100G QSFP28 passive copper twinax cable
• Hyper-converged infrastructure and distributed storage backend cabling
• Low latency 100G links for virtualization and AI compute racks
• Bulk stock purchase for distributors and Dell data center solution partners

2. 100G to 100G Direct Link for Switch-NIC

3.Upgrade Solution for 400G Data Center Network

The Core Feature

1. Cost-Effective Ultra-Short Connectivity

Using twinax copper, the 100G passive copper cable replaces a fiber pair and two optical transceivers, significantly cutting interconnect cost for short-reach links — plug-and-play, no modules required.

2. Ultra-Low Power, Maximum Energy Efficiency

The 100g qsfp28 passive copper twinax cable draws near-zero power, reducing heat and energy costs in dense racks, while delivering a cost-effective, low-latency 100G link for short-reach connections — within a rack or across adjacent racks.

3.Host-Device Tested for Proven Interoperability

4. 100% Individually Tested for Peak Performance

Every single unit is tested individually — no sampling, no shortcuts — to ensure optical compliance and continuous operational stability. Curious how we do it? Take a virtual tour of our Test Center.

FAQ

Q1: What physical factors set the maximum working distance for a 100G QSFP28 passive copper twinax cable? A: High-frequency signal attenuation and differential impedance matching define the distance limit. HYTOPTODEVICE 100G QSFP28 passive copper twinax cable meets MSA rules and delivers reliable 100G links up to 5 meters.

Q2: What is the core difference between passive copper twinax DAC and active DAC in signal handling? A: Passive twinax DAC has no built-in signal recovery chips and maxes at 5m, while active DAC uses retimers and equalizers to extend reach to 7–10m. HYTOPTODEVICE supplies both options for different rack layout demands.

Q3: What network faults can appear if you run a 100G QSFP28 passive copper twinax cable longer than rated? A: Over-length deployment causes link flapping, rising CRC errors or unexpected link down. Copper signal loss accelerates quickly beyond design limits. Every HYTOPTODEVICE 100G QSFP28 passive copper twinax cable has clear length marking to avoid misuse.

Q4: Can I use a 100G QSFP28 passive copper twinax cable to connect switches in separate server rows? A: Passive twinax DAC is not suitable for cross-row cabling, as inter-row runs usually exceed the 5m limit. AOC or fiber is the better choice; HYTOPTODEVICE twinax cable is optimized for intra-rack short connections.

Q5: Will short 1m 100G QSFP28 passive copper twinax cable produce harmful signal reflection? A: Proper impedance-controlled short twinax cable avoids unwanted reflection. HYTOPTODEVICE runs eye diagram validation on every batch of 100G QSFP28 passive copper twinax cable to guarantee signal quality.

Q6: Will unprogrammed generic 100G QSFP28 twinax cable be recognized normally on locked Dell, Arista or Cisco switches? A: Generic uncoded twinax cables often trigger unsupported transceiver alerts on vendor-locked platforms. HYTOPTODEVICE preloads matched EEPROM signatures for Dell OS, EOS and NX-OS for plug-and-play operation.

Q7: What tools do I need to rewrite EEPROM data on a 100G QSFP28 passive copper twinax cable onsite? A: A dedicated EEPROM programmer and supporting coding software are required. HYTOPTODEVICE can provide the programmer kit, software and remote technical support. Most buyers select pre-coded cables to save time and prevent coding faults.

Q8: Does deploying third-party 100G QSFP28 passive copper twinax cable void Dell switch OEM warranty automatically? A: Most OEMs will not cancel the whole hardware warranty just for compatible third-party twinax cable, but damage caused by defective cabling may be excluded. Factory-tested HYTOPTODEVICE 100G QSFP28 passive copper twinax cable reduces this deployment risk.

Q9: Why do Dell OS firmware updates sometimes break recognition of third-party 100G twinax DAC cables? A: Major firmware releases often strengthen transceiver authentication checks, requiring updated EEPROM profiles from the cable vendor. HYTOPTODEVICE keeps updating signature libraries to match new Dell firmware versions.

Q10: What information should I send the supplier for correct pre-coding for my Dell PowerSwitch? A: Prepare switch model, running firmware release and target compatible Dell part number. Send these details to HYTOPTODEVICE, and we will pre-program your 100G QSFP28 passive copper twinax cable before bulk shipment.

Q11: What BER rating can I get from factory inspected 100G QSFP28 passive copper twinax cable? A: HYTOPTODEVICE 100G QSFP28 passive copper twinax cable maintains BER below 1×10⁻¹² under full 100G load, satisfying data center standards. Batch signal testing ensures stable low-error leaf-spine fabric performance.

Q12: Why can this 100G QSFP28 passive copper twinax cable not work with PAM4 signaling? A: This twinax cable is designed for 25G NRZ lanes for 100GBASE-CR4 and lacks electrical characteristics for PAM4. HYTOPTODEVICE can supply PAM4-capable cable solutions for 400G projects upon request.

Q13: How is the shielding built to reduce crosstalk inside a 100G QSFP28 passive copper twinax cable? A: Our 100G QSFP28 passive copper twinax cable uses individual foil shielding for each twinax pair plus an outer braided shield. Dual-layer shielding suppresses crosstalk and EMI in dense server racks.

Q14: Are active DAC cables fitted with retimer chips and have higher failure rates than passive copper twinax DAC? A: Active DAC depends on retimer chips for signal recovery. Extra semiconductor parts bring more failure risks compared with all-copper twinax design. HYTOPTODEVICE recommends passive copper twinax cable for short rack links for better reliability.

Q15: What is the minimum allowable bend radius for your 100G QSFP28 passive copper twinax cable? A: The minimum safe bend radius for HYTOPTODEVICE 100G QSFP28 passive copper twinax cable is 35 mm. Bending smaller than this value deforms internal conductors and raises bit error rates over long run time.