Arista 100GQSFP28E-LR4S 100GBASE-LR4 QSFP28 Transceiver — 10km SMF, Duplex LC, Refurbished
Warranty: Lifetime
100G LR4 over duplex SMF — 10 km LAN-WDM, not CWDM4 2 km
Arista 100GQSFP28E-LR4S — 100GBASE-LR4 QSFP28 transceiver, refurbished
Arista / E-series Part Number: 100GQSFP28E-LR4S
Common aliases: QSFP-100G-LR4 · 100G-LR4
Description: Hot-pluggable QSFP28, 100GbE over duplex single-mode fiber, IEEE 100GBASE-LR4, duplex LC
This is the LR4 100G optic — four LAN-WDM lanes around 1310 nm muxed onto one duplex LC SMF pair for up to 10 km. Fully interoperable with standard 100GBASE-LR4 peers (including sibling PID 100GQSFP28E-LR4). It is not CWDM4 (2 km / different grid) and not SR4 (MPO multimode).
Refurbished, tested, and coded for Arista QSFP28 ecosystems. Lifetime warranty from Resilient Tec.
Which One Do I Need?
| Going into | You need |
|---|---|
| Arista (or Arista-coded) 100G QSFP28 port, duplex SMF, runs up to ~10 km | 100GQSFP28E-LR4S — this product (LR4) |
| Same cages, but BOM says CWDM4 / runs ≤ 2 km and you want the cheaper optic | 100GQSFP28E-CW4 — CWDM4 2 km |
| Short-reach parallel MMF (MPO-12) | QSFP28-SR4-100G — not this module |
| Cisco-coded 100G LR4 specifically | Cisco QSFP-100G-LR4-S Compatible |
LR4 vs CWDM4: same cage, same LC connector, different wavelength plan and reach. Match the PID — do not swap them because the fiber looks the same.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 100GQSFP28E-LR4S |
| Form Factor | QSFP28 (hot-pluggable) |
| Ethernet Standard | IEEE 802.3ba 100GBASE-LR4 |
| Data Rate | 100 Gbps (4 × 25.78125 Gb/s) |
| Wavelengths | LAN-WDM: 1295.56 / 1300.05 / 1304.58 / 1309.14 nm |
| Connector | Duplex LC/UPC |
| Fiber / Reach | Up to 10 km over duplex SMF (G.652) |
| DOM / DDM | Supported |
| Power | ~4.0 W max class |
| Operating Temperature | 0°C to 70°C (commercial) |
| Interoperability | Fully interoperable with 100GQSFP28E-LR4 / IEEE 100GBASE-LR4 peers |
| Standards | QSFP28 MSA, IEEE 802.3ba, RoHS |
| Warranty | Lifetime, backed by Resilient Tec |
| Condition | Refurbished |
Note on Reach: LR4 10 km vs LRL4 2 km
Full 100GBASE-LR4 is specified to 10 km on G.652. Arista also sells a shorter LRL4 (2 km) part that uses the same LAN-WDM grid but a tighter budget. This PID (100GQSFP28E-LR4S) is the 10 km LR4 class — interoperable with standard LR4. If your run is only a few hundred meters on SMF, CWDM4 is usually the better-value buy; if the BOM says LR4 or the span needs 10 km, stay here.
Good to Know
- Duplex LC SMF only — not MPO parallel fiber.
- LAN-WDM LR4 and CWDM4 will not interoperate with each other even though both use duplex LC.
- Refurbished = previously deployed, tested, and re-warranted by Resilient Tec.
- Confirm against your Arista EOS / platform optics matrix before production cutover.
Quick Checklist — Is This the Right Module?
You have a 100G QSFP28 port that accepts Arista LR4 coding. Your fiber is duplex single-mode with LC. You need up to 10 km (or your BOM specifically says LR4). You are not ordering CWDM4 or SR4 by mistake.
Availability
In stock at Resilient Tec · Ships from Knoxville, TN.
Need CWDM4 and LR4 mixed in one spare kit? We will quote both. Request a quote →
Warranty: lifetime, backed by Resilient Tec.
You Might Also Need
- 100GQSFP28E-CW4 — Arista 100G CWDM4 QSFP28, Refurbished
- QSFP28-SR4-100G — 100G SR4 QSFP28, Refurbished
- Cisco QSFP-100G-LR4-S Compatible — 100G LR4, 10 km
- Product guides · Request a quote
Related Guides
Lifetime warranty — how Resilient Tec backs what we sell
100G LR4 over duplex SMF — 10 km LAN-WDM, not CWDM4 2 km
Arista 100GQSFP28E-LR4S — 100GBASE-LR4 QSFP28 transceiver, refurbished
Arista / E-series Part Number: 100GQSFP28E-LR4S
Common aliases: QSFP-100G-LR4 · 100G-LR4
Description: Hot-pluggable QSFP28, 100GbE over duplex single-mode fiber, IEEE 100GBASE-LR4, duplex LC
This is the LR4 100G optic — four LAN-WDM lanes around 1310 nm muxed onto one duplex LC SMF pair for up to 10 km. Fully interoperable with standard 100GBASE-LR4 peers (including sibling PID 100GQSFP28E-LR4). It is not CWDM4 (2 km / different grid) and not SR4 (MPO multimode).
Refurbished, tested, and coded for Arista QSFP28 ecosystems. Lifetime warranty from Resilient Tec.
Which One Do I Need?
| Going into | You need |
|---|---|
| Arista (or Arista-coded) 100G QSFP28 port, duplex SMF, runs up to ~10 km | 100GQSFP28E-LR4S — this product (LR4) |
| Same cages, but BOM says CWDM4 / runs ≤ 2 km and you want the cheaper optic | 100GQSFP28E-CW4 — CWDM4 2 km |
| Short-reach parallel MMF (MPO-12) | QSFP28-SR4-100G — not this module |
| Cisco-coded 100G LR4 specifically | Cisco QSFP-100G-LR4-S Compatible |
LR4 vs CWDM4: same cage, same LC connector, different wavelength plan and reach. Match the PID — do not swap them because the fiber looks the same.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 100GQSFP28E-LR4S |
| Form Factor | QSFP28 (hot-pluggable) |
| Ethernet Standard | IEEE 802.3ba 100GBASE-LR4 |
| Data Rate | 100 Gbps (4 × 25.78125 Gb/s) |
| Wavelengths | LAN-WDM: 1295.56 / 1300.05 / 1304.58 / 1309.14 nm |
| Connector | Duplex LC/UPC |
| Fiber / Reach | Up to 10 km over duplex SMF (G.652) |
| DOM / DDM | Supported |
| Power | ~4.0 W max class |
| Operating Temperature | 0°C to 70°C (commercial) |
| Interoperability | Fully interoperable with 100GQSFP28E-LR4 / IEEE 100GBASE-LR4 peers |
| Standards | QSFP28 MSA, IEEE 802.3ba, RoHS |
| Warranty | Lifetime, backed by Resilient Tec |
| Condition | Refurbished |
Note on Reach: LR4 10 km vs LRL4 2 km
Full 100GBASE-LR4 is specified to 10 km on G.652. Arista also sells a shorter LRL4 (2 km) part that uses the same LAN-WDM grid but a tighter budget. This PID (100GQSFP28E-LR4S) is the 10 km LR4 class — interoperable with standard LR4. If your run is only a few hundred meters on SMF, CWDM4 is usually the better-value buy; if the BOM says LR4 or the span needs 10 km, stay here.
Good to Know
- Duplex LC SMF only — not MPO parallel fiber.
- LAN-WDM LR4 and CWDM4 will not interoperate with each other even though both use duplex LC.
- Refurbished = previously deployed, tested, and re-warranted by Resilient Tec.
- Confirm against your Arista EOS / platform optics matrix before production cutover.
Quick Checklist — Is This the Right Module?
You have a 100G QSFP28 port that accepts Arista LR4 coding. Your fiber is duplex single-mode with LC. You need up to 10 km (or your BOM specifically says LR4). You are not ordering CWDM4 or SR4 by mistake.
Availability
In stock at Resilient Tec · Ships from Knoxville, TN.
Need CWDM4 and LR4 mixed in one spare kit? We will quote both. Request a quote →
Warranty: lifetime, backed by Resilient Tec.
You Might Also Need
- 100GQSFP28E-CW4 — Arista 100G CWDM4 QSFP28, Refurbished
- QSFP28-SR4-100G — 100G SR4 QSFP28, Refurbished
- Cisco QSFP-100G-LR4-S Compatible — 100G LR4, 10 km
- Product guides · Request a quote
Related Guides
Lifetime warranty — how Resilient Tec backs what we sell