Pulse Transformers

Part Number	Description / PDF	Quantity
QT1553-24 PulseR (iNRCORE	TRANSFORMER PBC	0
E4001NLT PulseLarsen Antenna	XFRMR LAN ISOL 10BASE-T 1:2 SMD	685
YLTH48702T Trigon Components	TRANSFORMER ETHERNET LAN 10G	0
10GB-6012NLT PulseR (iNRCORE	LAN MODULE XFRMR 10GBASE-T SMD	0
H1012NL PulseLarsen Antenna	MODULE TRANSFMR SNGL LAN 16P SMD	347
SM91074ALE J.W. Miller / Bourns	10/100 BASE T XFORMER AECQ +125	0
78601/16MC Murata Power Solutions	PULSE XFMR 1:1 4MH	0
H4001CG Mentech Technology USA Inc.	QUAD LAN XFMR 10/100 BASE-T	400
HX5062NL PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 350UH	1929
PE-65745NL PulseLarsen Antenna	XFRMR LAN ISOL 1CT:1.414CT 10B-T	604
HM7142NL PulseLarsen Antenna	XFMR MDL 10GBASE-T SMT AEC-Q200	355
ALAN-505 Abracon	PULSE XFMR 1CT:1CT 350UH	0
HM6098FNL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	946
PA2053NLT PulseLarsen Antenna	PULSE XFMR 292UH	0
H7137NL PulseLarsen Antenna	10GBASE-T DISCRETE 5CH	315
HX5014FNLT PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 350UH	45
SPOE7-0508 Signal Transformer	POE PWR OVER ETHERNET EP10 CORE	3197
HM1238NL PulseLarsen Antenna	XFMR CMC MODULE AECQ BATT MNGT	52
H7008NL PulseLarsen Antenna	TRANSFORMER MODULE 10GBASE-T	0
PE-68515LNLT PulseLarsen Antenna	XFRMR MODULE 1PORT 1:1 10/100B-T	91

Pulse Transformers

1. Overview

Pulse transformers are specialized electromagnetic devices designed to transfer electrical pulse signals between circuits while maintaining galvanic isolation. They play a critical role in modern electronics by enabling efficient signal transmission, voltage level conversion, and noise suppression. Their unique ability to handle fast transient signals makes them essential in power electronics, telecommunications, and industrial control systems.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Signal Pulse Transformer	High bandwidth, fast rise time (ns level), low distortion	Digital communication interfaces (RS485, Ethernet)
Power Pulse Transformer	High voltage isolation (>1kV), high efficiency (>90%)	Switch-mode power supplies (SMPS), motor drives
High-Voltage Pulse Transformer	Multi-kV insulation, partial discharge resistance	X-ray generators, radar systems
Wideband Pulse Transformer	Frequency range: 100kHz-100MHz, flat response curve	RF amplifiers, test equipment

3. Structure and Components

Typical construction includes:

Primary/secondary windings: Enamelled copper wire with precise turn ratio
Magnetic core: Ferrite (high permeability), powdered iron (high saturation)
Insulation system: Multi-layer dielectric barriers, vacuum pressure impregnation
Termination: Surface-mount pads or through-hole pins

Advanced designs use planar transformers with PCB-integrated windings for improved thermal management.

4. Key Technical Parameters

Parameter	Typical Range	Importance
Turns Ratio	1:1 to 1:100	Voltage scaling accuracy
Frequency Range	100kHz-10MHz	Signal integrity maintenance
Isolation Voltage	500V-30kV	Safety compliance (UL/IEC)
Pulse Rise Time	1ns-50ns	Digital signal fidelity
Leakage Inductance	<1 H	Efficiency optimization

5. Application Fields

Power Electronics: Isolated gate drivers for IGBT/MOSFET
Telecommunications: DSL line interface units
Medical Equipment: Patient-isolated monitoring systems
Industrial Control: PLC signal transmission
Automotive: EV battery management system (BMS) isolation

Case Study: In electric vehicle chargers, pulse transformers enable 1500V isolation between grid and battery systems while maintaining 98% signal integrity at 2MHz switching frequency.

6. Leading Manufacturers

Manufacturer	Key Product Series	Specifications
Coilcraft	Pulse-Hi Series	1:1.4 ratio, 25kV isolation, 100MHz bandwidth
Pulse Electronics	PA1538NL	1:16 ratio, 3kV isolation, 100ns rise time
TDK-Lambda	CUT100	2.5kV isolation, 2MHz frequency, SMD package

7. Selection Guidelines

Key considerations:

Match turns ratio with driver/receiver voltage requirements
Verify insulation class against system safety standards
Check frequency response vs. signal bandwidth requirements
Consider thermal rating for continuous power operation
Evaluate PCB footprint constraints (through-hole vs SMD)

8. Industry Trends

Current development directions include:

Miniaturization through nanocrystalline core materials
Integration with EMI filtering components
Increased operating frequencies (>10MHz) for 5G infrastructure
SiC/GaN compatible designs for wide bandgap power devices
Automotive-grade models for 800V EV systems