VOOHU WH191R02SD0S02 as a Replacement for Molex 74737-0009 - SFP Cage Comparison

1. Competitor Product Overview (Molex, Molex LLC)

Molex (Molex LLC) is a globally recognized supplier of connectors and interconnect solutions, covering high-speed interconnects, optical-communication cages, and wire harnesses. Its 74737 series belongs to the High-Speed EMI Cages family. The 74737-0009 is an SFP single-port (1x1) one-piece press-fit EMI cage made of copper alloy, with EMI shielding spring fingers, 3.05 mm press-fit tails and a closed-top structure. It uses horizontal module-to-board mounting and tray packaging, supports data rates up to 10 Gbps, and provides board-level shielding and retention for SFP optical modules.

2. VOOHU Replacement Overview (Suzhou VOOHU Electronic Technology Co., Ltd.)

Suzhou VOOHU Electronic Technology Co., Ltd. (VOOHU) focuses on Ethernet connectors and magnetics, including RJ45 jacks, SFP cages, LAN transformers, common-mode chokes and protection devices. The WH191R02SD0S02 is an SFP 1x1 one-piece EMI cage made of nickel-plated stainless steel, with through-hole press-fit mounting, a closed-top structure and EMI shielding spring fingers. It operates from −55°C to +85°C, is RoHS and REACH compliant, and ships in tray packaging. Its port configuration, mounting method and structure match the Molex 74737-0009, with a comparable press-fit tail length, making it a drop-in replacement candidate for SFP optical ports in switches, optical transport and industrial Ethernet equipment.

3. Key Parameter Comparison

The table below uses the Molex 74737-0009 datasheet/product-page parameters as the baseline, with the corresponding VOOHU WH191R02SD0S02 drawing specs filled in (only parameters specified by both and matchable one-to-one are listed; items missing from one side are explained in the Notes).

Notes:

1. Housing material difference (key): the Molex 74737-0009 body is copper alloy, while the VOOHU WH191R02SD0S02 is nickel-plated stainless steel. Both are common SFP-cage materials - copper alloy offers slightly better conductivity/thermal transfer and shielding continuity, while nickel-plated stainless steel provides higher mechanical strength, corrosion resistance and better cost. For EMI/thermal-critical designs, please confirm with system-level testing.
2. Press-fit tail length: Molex specifies 3.05 mm and VOOHU's drawing specifies 2.90 mm (compliant-pin length below the board); the two are close. Actual press-fit must match PCB thickness and hole size - VOOHU's recommended PCB through-holes are Ø0.95±0.05 ×9, Ø1.05±0.1 x10 and Ø1.55±0.05 x2 (plating optional); please verify hole positions and plating against your PCB stack-up.
3. Operating temperature: VOOHU's drawing explicitly specifies −55°C to +85°C (industrial range); the Molex product page does not list an operating-temperature range, so it is not included in the comparison table.
4. Items specified only by Molex (not on the VOOHU drawing, hence not tabulated): data rate 10 Gbps, net weight approx. 4.309 g, rear legs 3, solder process SMC & WAVE, max solder temperature 265°C. SFP is a standardized mechanical interface; the cage itself does not set link speed, which is determined by the inserted optical module and PCB routing.
5. Pin/hole and footprint compatibility and plating should be finalized against both parties' 3D/PCB footprints. VOOHU's recommended PCB layout and bezel opening are on pages 2-3 of the drawing (bezel opening 15.25 x 16.25 mm, etc.).

4. Applications

1. Data communication and optical-module interfaces: board-level SFP/SFP+ cages for switches, routers, servers and NICs, supporting hot-swap.
2. Telecom and industrial Ethernet equipment: optical-port cages for transport gear and industrial switches, combining EMI shielding with mechanical retention.
3. Security and video transmission: SFP optical ports for fiber surveillance and video optical terminals.
4. High-density optical-port panels: designs requiring through-hole press-fit, solder-free mounting and bezel grounding/shielding.

5. FAQ

Q1: Can the VOOHU WH191R02SD0S02 directly replace the Molex 74737-0009?

Both are SFP 1x1 single-port one-piece press-fit EMI cages with matching port configuration, mounting (through-hole press-fit), closed-top structure, EMI spring fingers, horizontal mounting and tray packaging, and a comparable press-fit tail length (2.90 mm vs 3.05 mm). The main difference is the housing material (nickel-plated stainless steel vs copper alloy). Before replacing, compare the recommended PCB hole pattern and bezel opening, and validate against your system EMI/thermal requirements.

Q2: What is the impact of the different materials?

Copper alloy offers slightly better conductivity, thermal transfer and shielding continuity; nickel-plated stainless steel offers higher mechanical strength, corrosion resistance and better cost. In most SFP applications a nickel-plated stainless-steel cage meets EMI and thermal requirements; confirm with system-level testing.

Q3: Does the replacement require PCB changes?

VOOHU provides a recommended PCB hole pattern and bezel design (pages 2-3 of the drawing). If the original design follows the Molex 74737 footprint, hole positions are usually close, but please verify against VOOHU's recommended hole sizes (0.95 / 1.05 / 1.55).

Q4: What is the operating temperature range?

VOOHU specifies −55°C to +85°C, covering the industrial range; the Molex product page does not list an operating temperature - refer to its formal datasheet.

Q5: What about samples and lead time?

VOOHU sells factory-direct; sample orders typically ship within 48 hours and arrive within 7 days, with customization available. For more information visit www.voohuele.com or contact technical support at song.lei@voohu.cn.

Why VOOHU?

One-stop sourcing: connectors + magnetics + interface chips, full support from selection to small-batch production.

Custom solutions: just share your application requirements and budget to get a tailored solution with professional technical support.

Fast development: direct from the manufacturer, rapid FAE response, efficient sampling, shorter time-to-market.

Core qualifications: ISO9001, ISO14001, RoHS, REACH; two in-house factories ensure delivery and quality.

For more information, visit VOOHU: China www.voohu.cn | Overseas www.voohuele.com | Technical support: song.lei@voohu.cn

Replacement Cross-Reference

Molex 74737-0009 - SFP one-piece EMI cage, 1x1 port, through-hole press-fit with 3.05 mm tails, copper alloy, closed top, tray packaging, up to 10 Gbps. VOOHU WH191R02SD0S02 - SFP 1x1 EMI cage, through-hole press-fit with 2.90 mm tails, nickel-plated stainless steel, closed top, EMI spring fingers, operating temperature −55°C to +85°C, RoHS & REACH. Compatible VOOHU WH191R02SD0S02, replacement, visit for more information: