QSFP-100G-DR-S – 100G DR QSFP – LC SMF – 500m Reach

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Model: QSFP-100G-DR-S
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QSFP-100G-DR-S Description

The QSFP-100G-DR-S is a Cisco 100GBASE-DR QSFP transceiver for 100G links of up to 500m over duplex LC single-mode fiber. The module sends one wavelength between 1304.5 and 1317.5 nm with onboard PAM4 modulation and FEC, draws up to 4.3W and operates from 0 to 70 degrees C. The module interoperates with 400GBASE-DR4 optics only through fiber breakout cables, and it accepts PC or UPC patch cords but not APC.

Quick Specs

Parameter

Specification

Product ID

QSFP-100G-DR-S

Product type

100GBASE-DR QSFP optical transceiver

Cisco ordering description

100GBASE-DR QSFP Transceiver, 500m over SMF

Host interface

Cisco 100G QSFP port

Connector type

Duplex LC

Fiber type

Single-mode fiber

Fiber specification

G.652

Data rate

100 Gigabit Ethernet

Maximum cable distance

500m

Nominal wavelength

1310 nm

Optical specification

IEEE 802.3 100GBASE-DR

Power consumption

4.3W maximum

Operating temperature

0 to 70°C

Application Scenarios

Short Single-Mode Data Center Links

In a data center hall, a leaf switch and a spine switch up to 500m apart can connect over duplex LC single-mode patching, with the module sending a single PAM4 wavelength.

Fan-Out From A 400G DR4 Port

A 400GBASE-DR4 port on a spine switch can break out through fiber breakout cables into four 100G links, with the module terminating one of them at the far-end switch.

Product Comparison

Parameter

QSFP-100G-DR-S

QSFP-100G-PSM4-S

QSFP-100G-FR-S

QSFP-100G-LR-S

Maximum cable distance

500m

500m

2km

10km

Connector type

Duplex LC

MPO

Duplex LC

Duplex LC

Fiber type

Single-mode fiber

Single-mode fiber

Single-mode fiber

Single-mode fiber

Nominal wavelength

1304.5 to 1317.5 nm

1295 to 1325 nm

1304.5 to 1317.5 nm

1310 nm

Maximum power consumption

4.3W

3.5W

4.3W

4.0W

Operating temperature

0 to 70°C

0 to 70°C

0 to 70°C

0 to 70°C

QSFP-100G-DR-S and QSFP-100G-PSM4-S both stop at 500m on single-mode fiber, but QSFP-100G-DR-S uses duplex LC at 4.3W while QSFP-100G-PSM4-S uses an MPO connector at 3.5W, so the choice follows whether the plant is duplex LC or MPO. LC runs between 500m and 2km move to QSFP-100G-FR-S, and runs up to 10km move to QSFP-100G-LR-S at 4.0W. The datasheet also states that QSFP-100G-DR-S interoperates with 400GBASE-DR4 optics such as QSFP-400G-DR4-S through fiber breakout cables, which suits 400G-to-100G fan-out designs.

Ordering Checklist

  • Host support: Confirm the host switch or router is listed for this optic in the Cisco 100 Gigabit Ethernet Transceiver Modules Compatibility Matrix. The datasheet leaves exact hosts to the matrix, and a QSFP28 cage alone does not make the optic supported.
  • Patch cords: Order duplex LC patch cords with PC or UPC connectors, not APC. Only PC or UPC jumpers are allowed on QSFP-100G-DR-S; APC is documented for QSFP-100G-PSM4-S only.
  • Breakout from 400G: Add fiber breakout cables between QSFP-100G-DR-S and a 400GBASE-DR4 optic such as QSFP-400G-DR4-S. DR4 interoperability is documented only through breakout fibers, so the cabling must be on the order.

Specifications

Parameter Specification Parameter Specification
Product ID QSFP-100G-DR-S Product type 100GBASE-DR QSFP optical transceiver
Cisco ordering description 100GBASE-DR QSFP Transceiver, 500m over SMF Host interface Cisco 100G QSFP port
Connector type Duplex LC Fiber type Single-mode fiber
Fiber specification G.652 Data rate 100 Gigabit Ethernet
Maximum cable distance 500m Nominal wavelength 1310 nm
Optical specification IEEE 802.3 100GBASE-DR Signal method Single wavelength with onboard PAM4 modulation and FEC
400G breakout interoperability Interoperates with IEEE 400GBASE-DR4 transceivers such as Cisco QSFP-400G-DR4-S through fiber breakout cables Maximum power consumption 4.3W maximum
Pull tab color Orange QSFP connector module dimensions 13.5 x 18.4 x 72.4 mm maximum outer dimensions
QSFP connector module weight 100 grams or less Operating temperature 0 to 70°C
Storage temperature -40 to +85°C Standards references SFF-8665, SFF-8636, IEEE 802.3-2022, IEEE 802.3ba, IEEE 802.3bm
Safety classification Laser Class 1 Compliance reference RoHS 6

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Questions & Answers

  • What is the maximum reach of QSFP-100G-DR-S?

    QSFP-100G-DR-S reaches 500m over duplex LC G.652 single-mode fiber at a nominal wavelength of 1310 nm. The module accepts PC or UPC patch cords but not APC, and it uses a single wavelength with onboard PAM4 modulation and FEC.

  • What operating temperature range does QSFP-100G-DR-S support?

    QSFP-100G-DR-S operates from 0 to 70°C. Storage is rated from -40 to +85°C, and the module draws up to 4.3W at maximum power consumption while it runs. The module is a Laser Class 1 product.

  • Can QDD-400G-DR4-S break out to four QSFP-100G-DR-S modules, and over what fiber?

    Yes, QDD-400G-DR4-S can break out to four QSFP-100G-DR-S modules at 500m. The 400G end uses parallel G.652 single-mode fiber with an MPO-12 male connector. Each QSFP-100G-DR-S end uses duplex LC. Cisco's breakout guide lists this as a 400G to 100G (x4) performance level.

  • What reach applies when eight QSFP-100G-DR-S modules connect to a QDD-8X100G-FR breakout?

    The link is limited to 500m. QDD-8X100G-FR is a 2km optic on parallel G.652 single-mode fiber with dual MPO-12 male connectors. Cisco's breakout guide lists QSFP-100G-DR-S (x8) at the far end and marks the 500m limit for QSFP-100G-DR-S only. Plan the 800G to 100G (x8) run within that distance.

  • What transmit power range does QSFP-100G-DR-S launch into the fiber?

    The transmit power range is 4 maximum and -2.9 dBm minimum. The module is a Laser Class 1 device with an orange pull tab. Use these figures when you calculate the receive level on a 500m duplex LC link or set up an optical power check on the host port.

  • What fiber length does Cisco intend QSFP-100G-DR-S for in a leaf-spine fabric?

    Cisco's single-lambda 100G overview intends QSFP-100G-DR-S for leaf-spine links in data centers where fiber seldom exceeds 100 m. The module is rated for 500m, so the rated reach leaves margin for patch panels and longer rows between halls. Cisco lists the specification as IEEE 100GBASE-DR.

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DataSheet Downloads

  • QSFP-100G-DR-S Datasheet

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