QSFP-100G-SM-SR – 100G CWDM4 Lite QSFP – LC SMF – 2km Reach
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QSFP-100G-SM-SR Description
QSFP-100G-SM-SR is a Cisco QSFP-100G 100GBASE CWDM4 Lite optical transceiver for 100G single-mode fiber links in switch and router QSFP port designs. It is used for duplex LC 100G uplinks and interconnects where the fiber plant is SMF and the planned span stays within Cisco documented 2 km reach. Cisco identifies this SKU as a QSFP transceiver, documents the 100GBASE CWDM4 Lite optical type, specifies 2 km operation over SMF, lists an LC connector, and defines a +10 to +60 degrees C operating temperature range for this module.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
QSFP-100G-SM-SR |
|
Product type |
100GBASE CWDM4 Lite QSFP transceiver |
|
Ordering description |
100GBASE CWDM4 Lite QSFP Transceiver, 2km over SMF, 10-60C |
|
Host interface |
Cisco 100G QSFP port |
|
Connector type |
Duplex LC |
|
Fiber type |
Single-mode fiber |
|
Fiber specification |
G.652 |
|
Supported Ethernet rate |
100 Gigabit Ethernet |
|
Maximum cable distance |
2km |
|
Transmit and receive wavelengths |
Four lanes: 1271, 1291, 1311, and 1331 nm |
|
Optical link budget |
4.2 dB |
|
Power consumption |
3.5W maximum |
|
Operating temperature range |
+10 to +60 degrees C |
Application Scenarios
Use QSFP-100G-SM-SR for 100G links where the fiber run is single-mode G.652, the patching plan uses duplex LC connectors, and the expected distance stays within Cisco’s documented 2 km reach.
Keep this SKU separate from QSFP-100G-CWDM4-S and QSFP-100G-FR-S in spare stock. The names are close, but Cisco documents a specific CWDM4 Lite description, +10 to +60 degrees C temperature range, and 4.2 dB link budget for QSFP-100G-SM-SR.
Use Cisco compatibility documentation to verify the exact switch, router, line card, port type, and software release before ordering. This avoids quoting a valid optic that is not supported in the planned host device.
Product Comparison
|
Parameter |
QSFP-100G-SM-SR |
QSFP-100G-LR-S | ||
|---|---|---|---|---|
|
Product type |
100GBASE CWDM4 Lite QSFP transceiver |
100GBASE CWDM4 QSFP transceiver |
100GBASE FR1 QSFP transceiver |
100GBASE LR1 QSFP transceiver |
|
Connector type |
Duplex LC |
Duplex LC |
Duplex LC |
Duplex LC |
|
Fiber type |
Single-mode fiber |
Single-mode fiber |
Single-mode fiber |
Single-mode fiber |
|
Fiber specification |
G.652 |
G.652 |
G.652 |
G.652 |
|
Supported Ethernet rate |
100G |
100G |
100G |
100G |
|
Maximum cable distance |
2km |
2km |
2km |
10km |
|
Transmit and receive wavelengths |
1271, 1291, 1311, and 1331 nm |
1271, 1291, 1311, and 1331 nm |
1304.5 to 1317.5 nm |
1304.5 to 1317.5 nm |
|
Maximum power consumption |
3.5W |
3.5W |
4.3W |
4.0W |
|
Pull tab color |
Green |
Green |
Green |
Blue |
|
Operating temperature range |
+10 to +60 degrees C |
0 to 70 degrees C |
0 to 70 degrees C |
0 to 70 degrees C |
- QSFP-100G-SM-SR is the Cisco CWDM4 Lite choice for 2 km duplex LC single-mode links when the 4.2 dB link budget and +10 to +60 degrees C temperature range fit the site design.
- QSFP-100G-CWDM4-S shares the same 2 km distance and CWDM wavelengths, so the exact product ID should be checked carefully during order line and receiving.
- QSFP-100G-FR-S is also a 2 km LC single-mode optic, but Cisco documents a different FR1 optical profile and higher power consumption.
- QSFP-100G-LR-S belongs in 10 km single-mode planning, not routine 2 km CWDM4 Lite substitution.
Selection Guide
1. Choose it for 2 km LC single-mode links
Select QSFP-100G-SM-SR when the project needs a Cisco 100G QSFP transceiver for duplex LC G.652 single-mode fiber and the optical path is within 2 km.
2. Check the link budget, not only the distance
The documented 4.2 dB optical link budget matters when the path includes patch panels and multiple connector points. Confirm the measured or planned insertion loss before approving the bill of materials.
3. Do not mix CWDM4 Lite with unrelated 100G optics
Other Cisco 100G QSFP modules may use a different optical specification even when they share the same speed and connector style. Match both ends of the link and confirm module-to-module interoperability before purchase.
4. Validate host support in Cisco documentation
Confirm the Cisco platform, line card, QSFP port, and minimum software support in Cisco compatibility documentation before requesting final price, stock, warranty, and shipping confirmation.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact Product ID |
QSFP-100G-SM-SR |
Prevents confusion with CWDM4-S, FR-S, LR-S, or MPO-based 100G optics |
|
Host compatibility |
Cisco platform, line card, QSFP port, and software release |
Confirms the optic is supported in the intended device |
|
Fiber plant |
G.652 single-mode fiber with duplex LC patching |
Matches the documented cabling requirement |
|
Link distance and loss |
2 km maximum reach and 4.2 dB optical link budget |
Keeps the link inside Cisco’s documented operating envelope |
|
Remote optic |
Cisco-supported compatible 100G optic at the far end |
Reduces interoperability risk before deployment |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | QSFP-100G-SM-SR | Product type | 100GBASE CWDM4 Lite QSFP optical transceiver |
| Ordering description | 100GBASE CWDM4 Lite QSFP Transceiver, 2km over SMF, 10-60C | Host interface | Cisco 100G QSFP port |
| Connector type | Duplex LC | Fiber type | Single-mode fiber |
| Fiber specification | G.652 | Supported Ethernet rate | 100 Gigabit Ethernet |
| Maximum cable distance | 2km | Transmit and receive wavelengths | Four lanes: 1271, 1291, 1311, and 1331 nm |
| Optical link budget | 4.2 dB | Transmit power per lane | -6.9 to +2.5 dBm |
| Receive power per lane | -11.1 to +2.5 dBm | Power consumption | 3.5W maximum |
| Pull tab color | Green | QSFP connector module dimensions | 13.5 x 18.4 x 72.4 mm maximum outer dimensions |
| QSFP connector module weight | 100 grams or less | Operating temperature range | +10 to +60 degrees C |
| Storage temperature range | -40 to +85 degrees C | Standards references | SFF-8665, SFF-8636, IEEE 802.3-2022, IEEE 802.3ba, IEEE 802.3bm |
| Safety classification | Laser Class 1 | Compliance reference | RoHS 6 |
| Standard warranty | 5 years |
Get More Information
Need pricing, stock, or shipping details for the QSFP-100G-SM-SR ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email sales@layer23-switch.com for a fast quotation.
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