H3C SFP-GE-LH40-SM1270-CW Compatible 1G SFP Transceiver Module
The SFP-GE-LH40-SM1270-CW compatible module serves equipment requiring a 1G SFP interface with 1270nm optics and a 40km rating. Connection is through Duplex LC. Product data, application guidance and factory verification are presented together to support field technicians install, maintain and identify the exact compatible module.
OEM Part Number: SFP-GE-LH40-SM1270-CWHT Part Number: CW-SFP1G40-27
Product Highlights
- Compatible alternative to H3C SFP-GE-LH40-SM1270-CW
- 1G connectivity at 1000Mbps
- Optical wavelength: 1270nm
- Specified reach: 40km
- Duplex LC / SMF interface
- Digital diagnostic monitoring: Supported
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| H3C Compatible | SFP-GE-LH40-SM1270-CW |
|---|---|
| Manufacturer | HT |
| HT Part Number | CW-SFP1G40-27 |
| Form Factor | SFP |
| Max Data Rate | 1000Mbps |
| Wavelength | 1270nm |
| Max Cable Distance | 40km |
| Connector | Duplex LC |
| Media | SMF |
| Transmitter Type | DFB CWDM |
| Receiver Type | PIN |
| Receiver Sensitivity | <-24dBm |
| SMSR | 30dB |
| TX Power | -5~0dBm |
| RX Power | -24~-1dBm |
| Power Consumption | ≤1W |
| Power Budget | 19dB |
| EMC (Electro Magnetic Comnatihilitv) | Supported |
| DDM/DOM | Supported |
| Commercial Temperature Range | 0 to 70°C (32 to 158°F) |
| Protocols | SFP MSASFF-8472 |
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 1000Mbps, wavelength 1270nm, rated reach 40km.
Applications and Optical Link Design
Use this module for equipment interconnection over the specified single-mode fiber plant, including enterprise backbone, campus, metro or data-center interconnect links according to its rated distance. Confirm that both ends use the same optical standard and wavelength plan, and allow for connector, splice and patch-panel loss within the stated power budget.
Before deployment, check the host port type, supported data rate and firmware requirements. The 1G interface configuration must match the remote equipment; sharing a SFP housing alone does not make two transceiver types interoperable.
Wavelength-selective links require the exact channel plan at both ends. Confirm that filters pass 1270nm, then include their insertion loss in the 40km power budget. A nearby channel is not a substitute for the specified wavelength.
Optical Acceptance, Diagnostics and Handling
For this model, the specified transmit-power range is -5~0dBm; receiver sensitivity is <-24dBm; the stated optical power budget is 19dB. Digital diagnostics make later maintenance easier when baseline values are captured at installation. Save the initial readings with the port and OEM reference, then investigate meaningful changes rather than reacting to a single transient value. Diagnostic support depends on the host as well as the module, so unavailable fields should be confirmed with the platform documentation. Diagnostic monitoring is listed as Supported. 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 SFP-GE-LH40-SM1270-CW 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.
H3C Compatibility and Factory Testing
The module is checked for host recognition as SFP-GE-LH40-SM1270-CW, 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 H3C transceiver?
No. It is an HT-manufactured compatible alternative for equipment that specifies SFP-GE-LH40-SM1270-CW, not an original H3C-branded module.
Which fiber and connector are required?
Use Duplex LC with SMF. The specified maximum reach is 40km, 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 CW-SFP1G40-27 together with OEM reference SFP-GE-LH40-SM1270-CW 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.
