Juniper JNP-QSFP-40GE-ER4 · 740-066424

MPN / P/N

740-066424

Manufacturer model

JNP-QSFP-40GE-ER4

Part Number

740-066424

Speed

40 Gigabit Ethernet

Breakout Capable

No

Form Factor

QSFP+

Product Type

Optical Transceiver

Connector

Duplex LC PC/UPC

40GBASE-ER4 / Cable type

SMF

40GBASE-ER4 / Core size/cladding

9/125 µm

40GBASE-ER4 / Diagnostic support

Yes

40GBASE-ER4 / Distance

40 km

40GBASE-ER4 / Maximum Power consumption (W)

3.5 W

40GBASE-ER4 / Operating Temperature (range)

0° C to 70° C

40GBASE-ER4 / Optical receiver damage input power threshold

+3.8dBm(min each lane)

40GBASE-ER4 / Receiver input power, each lane (maximum)

–4.5 dBm

40GBASE-ER4 / Receiver input power, each lane (minimum)

–21.2 dBm

40GBASE-ER4 / Signaling rate, each lane

10.3125 GBd +/- 100 ppm

40GBASE-ER4 / Storage temperature

–40° C to 85° C

40GBASE-ER4 / Transmitter output power, each lane (maximum)

4.5 dBm

40GBASE-ER4 / Transmitter output power, each lane (minimum)

–2.7 dBm

40GBASE-ER4 / Transmitter wavelengths (range)

Lane 0–1264.5 nm to 1277.5 nm Lane 1–12845 nm to 1297.5 nm Lane 2–1304.5 nm to 1317.5 nm Lane 3–1324.5 nm to 1337.5 nm

Documented selection limits

Reach, rate, form factor and breakout support apply only to the listed standard/mode, fiber grade and platform/port configuration. Keep source qualifiers for FEC, attenuation, transmit/receive limits, temperature, active/passive operation and cable ends. Check Juniper HCT for the exact host, interface module, port mode, Junos release, required QSA adapter and qualifications before ordering. Do not infer universal interoperability or combine power/temperature/reach across model profiles. Optical link budgets are not calculated or inferred.

Specification source: Juniper ↗
Checked against documentation: 19.10.2026