Pulse Transformers

Part Number	Description / PDF	Quantity
PE-65848NLT PulseLarsen Antenna	XFRMR 1CS:1CS FOR ECHELON/NEURON	23
HDX8008NL PulseLarsen Antenna	MDL,SIN, HDBASET, 60W, SMT	316
H0019NLT PulseLarsen Antenna	MODULE MAGNETIC LAN 1:1 10/100	0
HM1188NL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	1020
HD8006FNL PulseLarsen Antenna	TRANSFORMER HDBASET 140W	279
H5G1002NLT PulseLarsen Antenna	MDL,SIN, 5GBASE-T, 4P POE (60W),	0
H2260NLT PulseLarsen Antenna	XFRMR MODUL 1PORT POE 1:1 10/100	0
HX1234 PulseLarsen Antenna	MODULE XFRMR ETHERNET LAN 40SOIC	0
HM1236NLT PulseLarsen Antenna	MDL, SIN, XFMR-CMC, 1:1, 3.2KV,	0
HX5181NL PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 350UH	211
H1081NLT PulseLarsen Antenna	XFRMR MODUL 1PORT 1:1.141 10/100	357
H5015NL PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT 1PORT	341
H6080FNL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	0
H5019NL PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT 1PORT	302
HX1148NLT PulseLarsen Antenna	XFRMR MODULE 1PORT 1:1 10/100	539
H7029FNL PulseLarsen Antenna	10GBASE-T DISCRETE 4CH MAR/SOL P	1570
PE-5760NL PulseLarsen Antenna	TRANSFORMER 1:1:1 500VRMS	424
HX1259NLT PulseLarsen Antenna	XFRMR MODULE 4PORT 1:1 10/100	0
PA2001NL PulseLarsen Antenna	PULSE XFMR 1:1 403UH	5559
HX5008FNL PulseLarsen Antenna	PULSE XFMR 1CT:1 TX 1CT:1 RX	561

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