Lan Transformer: VOOHU WHS16037T G as Replacement for Pulse HX1188NL

1. Competitor Product Overview (Pulse Electronics / YAGEO)

Pulse Electronics (a YAGEO Company) HX1188NL (Tape & Reel: HX1188NLT) is a high-performance 100BASE-TX single-port SMD transformer module in a 16-pin package, IEEE 802.3 compliant, J-STD-020 Level 1 (no moisture sensitivity), peak reflow 245°C, RoHS compliant, with an operating temperature of -40°C to +85°C. It features a DAP (Diallyl Phthalate) housing with UL 94V-0 flammability rating and is widely used in 100 Mbps Ethernet interface designs.

2. VOOHU Replacement Product (Su Zhou Voohu Electronic Tech. Co., Ltd.)

VOOHU WHS16037T G is the ideal drop-in replacement offering equivalent functionality with superior cost-effectiveness and supply stability. It is a 10/100BASE-TX single-port SMD transformer module in a pin-compatible 16-pin package, with an identical schematic topology (1CT:1CT, TX/RX dual channel), operating from -40°C to +85°C, allowing direct substitution for the Pulse HX1188NL without PCB redesign.

3. Key Parameter Comparison

The table below maps Pulse product page parameters to VOOHU WHS16037T G specifications. Yellow-highlighted cells indicate notable differences.

Notes:
① Insertion loss: VOOHU -1.1 dB vs Pulse -1.0 dB (1-100 MHz) — only 0.1 dB difference, within IEEE 802.3 limits.
② Return loss: both meet 100BASE-TX standard; presentation differs (Pulse uses formula, VOOHU uses per-band fixed values).
③ Crosstalk: Pulse specifies strict low-frequency value (-62 dB @ 1 MHz); VOOHU provides a unified guaranteed minimum (-30 dB). Performance at actual 100BASE-TX operating frequencies (4-80 MHz) is comparable — bench validation recommended.
④ Turns ratio tolerance: VOOHU ±5% vs Pulse ±2%; both meet application requirements.

4. Application Scenarios

100BASE-TX single-port transformer modules are widely used in the following applications:

1. Ethernet PHY Interface Isolation

Used between the PHY chip and RJ45 connector for signal isolation and impedance matching. WHS16037T G is compatible with mainstream 100M PHY chips.

2. Industrial Automation and Fieldbus Devices

Suitable for Industrial Ethernet devices such as industrial controllers, field devices, and PROFINET interface cards; the wide operating temperature range (-40°C to +85°C) meets industrial-grade requirements, while 1500 VAC isolation ensures circuit safety.

3. IP Cameras and Video Surveillance

Ideal for IP cameras and video encoders. Low insertion loss ensures stable 100 Mbps video stream transmission.

4. Medical Electronics and Precision Instruments

Appropriate for medical devices and precision instruments requiring high isolation voltage (1500 VAC), meeting patient safety standards and EMC compliance.

5. Embedded Boards and Industrial PCs

Ideal for industrial motherboards, embedded systems, and Mini-ITX designs. The compact 16-pin SMD package enables high-density PCB layouts and reduces BOM cost.

5. Frequently Asked Questions (FAQ)

Q1: Is VOOHU WHS16037T G fully pin-compatible with Pulse HX1188NL? Can it be replaced without a PCB change?

A: Yes. Both products use a 16-pin SMD package with 1.27 mm pitch and identical pin assignments (TD+/CT/TD-/RD+/CT/RD-). VOOHU WHS16037T G can be directly substituted without any PCB redesign.

Q2: VOOHU's crosstalk spec (-30 dB) is much lower than Pulse (-62 dB @ 1 MHz). Will this affect real-world performance?

A: The Pulse -62 dB figure applies at 1 MHz (very low frequency) and is expressed via a frequency-dependent formula. In the actual 100BASE-TX operating band (10-80 MHz), performance between the two products is comparable. VOOHU provides a flat guaranteed minimum of -30 dB across 1-100 MHz. Bench validation on the target board is recommended.

Q3: Does VOOHU WHS16037T G support speeds other than 100BASE-TX?

A: Yes. VOOHU WHS16037T G is rated for 10/100BASE-TX, meaning it is backward compatible with 10BASE-T. This makes it suitable for products with Auto-Negotiation (10/100 Mbps), providing broader application coverage than the Pulse HX1188NL.

Q4: Is VOOHU WHS16037T G RoHS compliant and environmentally certified?

A: Yes. VOOHU WHS16037T G is fully RoHS compliant, free of lead, mercury, cadmium, and other restricted substances, meeting EU and major market environmental regulations. It supports lead-free reflow, compatible with standard SMT production lines.

Q5: What is the minimum order quantity (MOQ) and lead time for VOOHU WHS16037T G?

A: VOOHU WHS16037T G is packaged in Tape & Reel at 600 pcs per reel — the same quantity as Pulse. VOOHU supports sample orders with shipment within 48 hours and delivery within 7 days. For bulk pricing, contact: TEL: +86 400 1048 018, WEB: www.voohuele.com.

Why Choose VOOHU?

One-Stop Sourcing: Connectors + Magnetics + Interface ICs — full support from component selection to small-batch production

Custom Solutions: Share your application requirements and budget; receive a tailored solution with dedicated technical support

Fast Development: Direct factory sales, rapid FAE response, efficient sampling — accelerate your time-to-market

Core Certifications: ISO9001, ISO14001, RoHS, REACH — two proprietary factories ensuring on-time delivery and quality

Visit us: China: www.voohu.cn  |  Global: www.voohuele.com  |  Technical Support: song.lei@wohu-tek.com

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