Juniper QSFP-4X25G-LR · 740-148749

MPN / P/N

740-148749

Manufacturer model

QSFP-4X25G-LR

Part Number

740-148749

Breakout Capable

Yes

Form Factor

QSFP28

Product Type

Optical Transceiver

Connector

MPO-12 APC

25GBASE-LR / Cable type

SMF

25GBASE-LR / Core size/cladding

9/125 µm

25GBASE-LR / Digital Diagnostic Monitoring

Temperature Supply voltage TX bias current TX power RX power

25GBASE-LR / Distance

2 m to 10 km

25GBASE-LR / Effective modal bandwidth

(for MM only)

25GBASE-LR / Fiber grade

(for MM only)

25GBASE-LR / Form Factor (i.e., SFP, SFP+, XFP, CFP, etc..)

QSFP28

25GBASE-LR / MSA compliance (SFF, for e.g. SFF-8665)

SFF-8636 SFF-8024

25GBASE-LR / Maximum Power consumption (W)

3.5W

25GBASE-LR / Minimum Junos/EVO OS release

23.3R1(EX4650 and QFX5120-48Y) 23.4R1: EX4400-24MP, EX4400-24P, EX4400-24T, EX4400-48F, EX4400-48MP, EX4400-48P, EX4400-48T, EX4300-MP

25GBASE-LR / Operating Temperature (range)

0C-70C

25GBASE-LR / Optic Type (Commercial Vs Service Provider Grade)

Commercial

25GBASE-LR / Receive lane wavelengths (range)

1284.5nm to 1297.5nm

25GBASE-LR / Receiver input power, each lane (maximum)

2.0 dBm

25GBASE-LR / Receiver input power, each lane (minimum)

-13.3 dBm

25GBASE-LR / Receiver sensitivity (OMA), each lane (maximum)

-12.3 dBm

25GBASE-LR / Signaling rate, each lane

25.78125GBd ± 100 ppm

25GBASE-LR / Standards compliance (Ethernet/OTN Standard, for e.g. 100GBASE-LR4)

25GBASE-LR Note: 100G PSM4 MSA compliant

25GBASE-LR / Storage temperature

-40C to 85C

25GBASE-LR / Stressed receiver sensitivity (OMA) each lane (maximum)

-9.5 dBm

25GBASE-LR / Transmitter RMS spectral width (maximum)

(for MM only)

25GBASE-LR / Transmitter fibers

1

25GBASE-LR / Transmitter output power, each lane (maximum)

2.0 dBm

25GBASE-LR / Transmitter output power, each lane (minimum)

-6.7dBm

25GBASE-LR / Transmitter wavelengths (range)

1295nm to 1325nm

25GBASE-LR / Typical Weight & Dimensions

Weight: 0.15 kg Height: 8.55 mm Width: 13.55 mm Depth: 57.5 mm

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