40 G - QSFP+
Single Mode / 100 M / Cisco
$165.00
Sale price
$165.00
Regular price
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40 G - QSFP+
$165.00
Sale price
$165.00
Regular price
QSFP+ — 40G. 40G aggregation — four parallel 10G lanes in one cage.
Overview
Quad SFP+, SFF-8436. Four 10.3125 Gbps electrical lanes aggregated into one module — used as native 40G (SR4/LR4/ER4) or broken out into 4× 10G SFP+ links on platforms that support it. Common in legacy data-center spines and storage networks; less common in new builds.
Key specifications
| Speed | 40G |
|---|---|
| Electrical interface | 4 lanes × 10.3125 Gbps NRZ SerDes |
| Signalling | Per-lane 64B/66B NRZ |
| FEC | None at 40G (BASE-R / FireCode FEC optional on some platforms) |
| Typical power draw | 1.5 W – 3.5 W per module |
| Connectors | MPO-12 (SR4), LC duplex (LR4, ER4, BiDi), QSFP+ DAC, AOC, breakout cables |
| MSA / standards | SFF-8436 (mechanical); SFF-8636 (management) |
| Introduced | 2010 (IEEE 802.3ba) |
Available variants
| Part number | Standard | Wavelength | Fiber | Reach | Notes |
|---|---|---|---|---|---|
NAP-QSFP-SR4 |
40GBASE-SR4 | 850 nm | MM OM3/4 | 100 / 150 m | MPO-12, 4×10G VCSEL |
NAP-QSFP-LR4 |
40GBASE-LR4 | 1271/91/11/31 nm CWDM | SM | 10 km | LC duplex |
NAP-QSFP-ER4 |
40GBASE-ER4 | 1271/91/11/31 nm CWDM | SM | 40 km | Extended reach |
NAP-QSFP-PSM4 |
40G PSM4 | 1310 nm | SM parallel | 500 m – 10 km | MPO-12, 4 parallel SM |
NAP-QSFP-BIDI |
40G BiDi (Cisco) | 832/918 nm | MM OM3/4 | 100 / 150 m | Re-uses existing 10G MM duplex |
NAP-QSFP-DAC-1M…5M |
40G DAC | — | Twinax | 1–5 m | Passive |
NAP-QSFP-BREAKOUT-3M |
40G → 4×10G DAC | — | Twinax | 3 m | One QSFP+ to four SFP+ |
Coded for these platforms
Every NetAPI QSFP+ module is OEM-coded for the target switch and validated against current production firmware. Common targets:
- Cisco Nexus 5K/7K/9K, Catalyst 9500/9600
- Juniper QFX5100/5110/5200, MX
- Arista 7050, 7280, 7300
- Dell S-series, Z-series (legacy)
- NVIDIA Spectrum (legacy)
Recommended for
- Retrofit / parity with existing 40G data-center fabric
- Cisco BiDi 40G overlays on OM3/OM4 cabling plant
- 40G storage interconnect (legacy iSCSI/FCoE)
- Aggregating 4×10G access uplinks via breakout
Engineering notes
- 40G is declining in new deployments — most architectures skip directly from 10G to 25G/100G. Recommended only for matching existing 40G infrastructure or specific Cisco BiDi retrofits.
- 40G BiDi (Cisco-style) is not an IEEE standard — wavelength pairings vary by vendor. Always pair like-with-like.
Need a coding or reach you don't see? NetAPI custom-codes against the full Cisco, Juniper, Arista, Dell, HPE, Aruba, Palo Alto, Huawei, and NVIDIA OUI sets. Contact us with your switch model and we'll quote.