HB1601SNL Ethernet transformer Overview
The HB1601SNL is a compact surface-mount (SMD) 10/100Base-T Ethernet isolation transformer and filter designed for reliable network signal transmission and noise suppression in Ethernet PHY interfaces. Housed in an SOP-16 package, it provides galvanic isolation, impedance matching, and excellent EMI performance for Fast Ethernet applications.
Designed in accordance with IEEE 802.3 and ANSI X3.263 standards, the HB1601SNL is widely used in SOHO networking equipment, LAN-on-Motherboard (LOM) designs, Ethernet switches, hubs, and industrial networking devices. It is RoHS-compliant, lead-free, and suitable for automated SMT assembly.
Ordering Information
- Part Number: HB1601SNL
- Package: SOP-16, Tape & Reel (for automated SMT assembly)
- Category: LAN Magnetics / Ethernet Isolation Transformers
The HB1601SNL is a reliable, standards-compliant 10/100Base-T SMD Ethernet isolation transformer designed for compact, high-performance networking equipment. With proven electrical performance, strong isolation, and UL certification, it is an ideal choice for OEM designs and professional repair applications.
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Key Features of SMD Ethernet isolation transformer
- 10/100Base-T Ethernet isolation transformer with integrated filtering
- SOP-16 surface-mount package, optimized for compact PCB layouts
- Designed to meet IEEE 802.3 and ANSI X3.263 specifications
- Excellent signal integrity with low insertion loss and high return loss
- High common-mode noise rejection (DCMR)
- 1500 Vrms isolation (Hi-Pot) for reliable galvanic isolation
- RoHS compliant, lead-free construction
- Supports reflow soldering up to 245 °C (5 seconds max)
- UL certified (File No. E484635)
HB1601SNL Datasheet
Specifications of HB1601SNL LAN Transformer
Mechanical & Environmental Specifications
| Parameter | Value |
| Package Type | SOP-16 (Surface Mount) |
| Mounting | SMT (Reflow Soldering) |
| Operating Temperature | 0 °C to +70 °C |
| Max Reflow Temperature | 245 °C, 5 seconds |
| Compliance | RoHS, Lead-Free |
| Safety Certification | UL Recognized (E484635) |
Electrical Specifications (@25 °C)
Inductance (OCL)
- 350 µH MIN
- Measured at 100 kHz, 0.1 Vrms, 8 mA DC bias
Turns Ratio
- TX: 1CT : 1CT
- RX: 1CT : 1CT
Insertion Loss
- 0.1 – 100 MHz: -1.1 dB MAX
Return Loss (Typical)
- 30 MHz: -20 dB
- 60 MHz: -14 dB
- 80 MHz: -11.5 dB
Crosstalk (Typical)
- 30 MHz: -45 dB
- 60 MHz: -40 dB
- 100 MHz: -35 dB
Differential-to-Common Mode Rejection (DCMR, Typical)
- 30 MHz: -42 dB
- 50 MHz: -37 dB
- 100 MHz: -33 dB
Isolation Voltage
Applications of 10/100Base-T SOP-16 LAN magnetics
The HB1601SNL is designed to support a wide range of Fast Ethernet networking applications, including:
- SOHO networking equipment (ADSL modems, routers, gateways)
- LAN-on-Motherboard (LOM) Ethernet interfaces
- Ethernet hubs and switches
- Embedded Ethernet controllers
- Industrial networking and automation systems
- Network device repair and refurbishment
Its SOP-16 form factor makes it ideal for high-density PCB designs where board space is limited.
HB1601SNL PCB Design & Assembly Notes
- Follow the recommended SOP-16 land pattern to ensure proper solder wetting and coplanarity.
- Maintain adequate clearance between primary and secondary circuits to preserve isolation performance.
- Place the transformer close to the Ethernet PHY to minimize trace length and reduce EMI.
- Use controlled impedance routing for TX/RX differential pairs.
- Suitable for standard lead-free reflow soldering profiles, with a maximum peak temperature of 245 °C.
Standards & Compliance of Ethernet Isolation Transformer
- IEEE 802.3 compliant for 10/100Base-T Ethernet
- ANSI X3.263 compliant
- RoHS compliant and lead-free
- UL Recognized Component (File No. E484635)
These certifications make the HB1601SNL suitable for global markets and long-term industrial deployment.
FAQs about HB1601SNL 10/100Base-T Ethernet Transformer
1. What is the primary function of HB1601SNL?
HB1601SNL provides galvanic isolation, impedance matching, and noise suppression between the Ethernet PHY and the network cable in 10/100Base-T applications.
2. Is HB1601SNL suitable for PoE designs?
HB1601SNL is designed for Fast Ethernet signal isolation. PoE capability depends on the overall system design, current rating, and PCB layout. Always verify against PoE standards before use.
3. Can HB1601SNL be used in industrial environments?
Yes. With its high isolation voltage, strong DCMR performance, and UL recognition, it is suitable for industrial and embedded Ethernet applications within the specified temperature range.
4. Is this part suitable for automated SMT production?
Yes. The SOP-16 package supports tape-and-reel packaging and standard reflow soldering processes.
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HB1601SNL 10/100Base-T SMD Ethernet Isolation Transformer SOP-16 Images
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