Brocade 40G-QSFP-ESR4 Compatible 40G QSFP+ ESR4 Transceiver Module
This Brocade 40G-QSFP-ESR4 compatible transceiver provides 40G connectivity in a hot-swappable QSFP+ package. Its optical design operates at 850nm for up to 400m on OM4, using MTP/MPO-12 Male. Complete parameters and related OEM references help field technicians install, maintain and identify the exact compatible module.
OEM Part Number: 40G-QSFP-ESR4HT Part Number: QSFP-CSR4-40G
Product Highlights
- Compatible alternative to Brocade 40G-QSFP-ESR4
- 40G connectivity at 42Gbps (4x 10.5Gbps)
- Optical wavelength: 850nm
- Specified reach: 400m on OM4
- MTP/MPO-12 Male / MMF interface
- Operating temperature: 0 to 70°C (32 to 158°F)
- Factory compatibility verification and optical performance testing before shipment
Specifications
| Brocade Compatible | 40G-QSFP-ESR4 |
|---|---|
| Manufacturer | HT |
| HT Part Number | QSFP-CSR4-40G |
| Form Factor | QSFP+ |
| Max. Data Rate | 42Gbps (4x 10.5Gbps) |
| Wavelength | 850nm |
| Max. Transmission Distance | 400m@OM4 |
| Connector | MTP/MPO-12 Male |
| Media | MMF |
| Transimitter Type | VCSEL 850nm |
| Receiver Type | PIN |
| TX Power | -7.5~0dBm |
| Receiver Sensitivity | <-9.9dBm |
| Power Budget | 2.4dB |
| Receiver Overload | 2.4dBm |
| Max. Power Consumption | ≤1.5W |
| Extinction Ratio | >3dB |
| Host FEC | Supported |
| Bit Error Ratio (BER) | 1E-12 |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Protocols | 40G Ethernet, SATA/SAS3, IEEE 802.3ba, MSA Compliant |
Field Installation and Maintenance
Inspect the connector and patch lead before installation, then support the fiber without pulling on the module housing. Release the latch properly during maintenance and keep dust protection on unused interfaces. If a module is removed for later use, retain its part-number label and record its original port. For this model, the principal parameters are data rate 42Gbps (4x 10.5Gbps), wavelength 850nm, rated reach 400m on OM4.
Applications and Optical Link Design
Typical deployments include switch-to-switch, switch-to-server and aggregation links inside a data hall or between adjacent equipment rooms. The MTP/MPO-12 Male interface connects to the specified multimode cabling, and the stated reach depends on fiber grade and link loss. Keep this interface on the matching multimode optical standard rather than connecting it directly to a single-mode wavelength or reach variant.
Before deployment, check the host port type, supported data rate and firmware requirements. The 40G interface configuration must match the remote equipment; sharing a QSFP+ housing alone does not make two transceiver types interoperable.
The multimode channel should use the fiber grade associated with the stated 400m on OM4 reach. Keep the MTP/MPO-12 Male end faces clean and avoid tight bends. Different multimode standards are not interchangeable merely because they share a connector.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -7.5~0dBm; receiver sensitivity is <-9.9dBm; the stated optical power budget is 2.4dB. During commissioning, record the host diagnostic readings after the link has stabilized and compare them with those limits. DOM values are useful operational indicators, but they do not replace calibrated optical measurements when a link is marginal. Investigate unexpected loss through connector inspection, cleaning and a channel measurement before replacing the module. Before every insertion, keep dust caps in place until the patch lead is ready, avoid touching the optical end face and use an appropriate inspection and cleaning procedure. Do not look into an active optical interface.
Quality Assurance and Packaging
Each 40G-QSFP-ESR4 compatible module is inspected, powered up and functionally checked before protective packing. Dust caps and individual trays shield the interface during transport. Customer references, rack groups and project packing lists can be added for volume orders.
Brocade Compatibility and Factory Testing
The module is checked for host recognition as 40G-QSFP-ESR4, link establishment and diagnostic reporting. Physical cage fit alone is not treated as evidence of compatibility. Equipment model, hardware revision and software release can be reviewed before dispatch where platform behavior is uncertain.
Frequently Asked Questions
Is this an original Brocade transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies 40G-QSFP-ESR4, not an original Brocade-branded module.
Which fiber and connector are required?
Use MTP/MPO-12 Male with MMF. The specified maximum reach is 400m on OM4, subject to fiber quality and total link loss.
Can it be mixed with another wavelength or reach version?
Only when the two ends share the same optical standard, wavelength plan and supported data rate. Check the exact part numbers and link budget rather than relying only on the module form factor.
Ordering Information
Quote HT part number QSFP-CSR4-40G together with OEM reference 40G-QSFP-ESR4 and quantity. Add the host model and software release when pre-order verification is required. Neutral labels, customer packaging and project-specific compatibility review are available on request.
Shipping and Lead Time
Standard configurations normally ship within one to three working days, with production lead times confirmed for larger quantities. International courier, air freight and sea freight are available; customer courier accounts and nominated forwarders are accepted.
