QFX-QSFP-40G-ESR4: Juniper Networks 40GBASE-ESR4 QSFP+ Transceiver Module (MMF, 850nm, 300m, MPO)
MPN: QFX-QSFP-40G-ESR4|By: Juniper Networks
Starting from
$720
Indicative. Final pricing is confirmed with your quote.
In Stockships worldwide
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
Product overview
QFX-QSFP-40G-ESR4 is a Juniper Networks 40GBASE-ESR4 QSFP+ Transceiver Module (MMF, 850nm, 300m, MPO). Optics have to match at both ends and are frequently vendor-coded, so a module that is electrically correct can still refuse to link. Tell us both switch models and we will confirm compatibility before it ships.
Tell us the switch at each end and we will confirm the coding before anything ships, not after it fails to link.
Specifications
General
- Manufacturer part number
- QFX-QSFP-40G-ESR4
- Product Type
- Transceivers & Cables
- Manufacturer
- Juniper Networks
Interfaces & connectivity
- Connector
- MPO
Published specifications for QFX-QSFP-40G-ESR4. Anything not listed here we will confirm against the manufacturer's documentation before quoting, because we would rather answer the question than let you assume.
Where the Juniper Networks QFX-QSFP-40G-ESR4 is deployed
- Swapping out a failed transceiver for QFX-QSFP-40G-ESR4 under change control
- Cabling a new rack into an installed fabric
- Replacing an optic that has started erroring
Who this part is for
- Data centre teams cabling a new rack to an installed fabric
- MSPs holding spare optics against a customer SLA
- Integrators supplying the passive layer with a switch order
What you get ordering this from us
Ordered by part number
QFX-QSFP-40G-ESR4 is what is quoted and QFX-QSFP-40G-ESR4 is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Volume pricing
The listed price is per unit; tiered pricing applies at quantity and purchase orders are accepted.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Questions buyers ask about this part
Is QFX-QSFP-40G-ESR4 genuine and is the warranty intact?
Yes. Supplied new and unopened, so the manufacturer warranty and firmware update path stay supported. No grey-market stock and no refurbished units sold as new.
Will QFX-QSFP-40G-ESR4 work in my server?
Tell us the switch at both ends of the link. Optics are frequently vendor-coded, so a module that is electrically correct can still refuse to come up; we confirm the coding for both ends before it ships.
Do you accept purchase orders and quote at volume?
Yes. Purchase orders are accepted from qualified organisations, net terms are available on approval, and tiered pricing applies at quantity. Tell us how many you need.
Compare other Transceivers & Cables we stock
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| 10G SFP+ SR 850nm 300m Optical Transceiver Module | NVIDIA Networking | Speed: 10Gb/s | In Stock | $40 |
| Cisco 1G SFP SX 850nm Optical Transceiver Module | Cisco | Speed: 1Gb/s | In Stock | $60 |
| Arista 1G SFP SX 850nm Optical Transceiver Module | Arista | Speed: 1Gb/s | In Stock | $50 |
| Juniper 1G SFP SX 850nm Optical Transceiver Module | Juniper | Speed: 1Gb/s | In Stock | $50 |
| HPE 1G SFP SX 850nm Optical Transceiver Module | HPE | Speed: 1Gb/s | In Stock | $50 |
| Dell Technologies 1G SFP SX 850nm Optical Transceiver Module | Dell Technologies | Speed: 1Gb/s | In Stock | $50 |
Browse all Transceivers & Cables or everything we stock from Juniper Networks.
Specifying a system, not just the part?
Optics and cabling are part of the fabric spec on a cluster build, since both ends and the switch have to agree.