Pulse Transformers

Part Number	Description / PDF	Quantity
H5020NL PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT 2PORT	422
H2009FNLT PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	34
H5014NLT PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT 2PORT	250
HD8008NL PulseLarsen Antenna	MOD,SIN,HDBT,1:1, SMD, NPB	0
HM1225NL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	0
PA1138NLT PulseLarsen Antenna	XFRMR 12V 13.5W 127UH POE EP13	19501950
HM2102NLT PulseLarsen Antenna	XFMR CMC MODULE AECQ BATT MNGT	2238
PA2777NL PulseLarsen Antenna	PULSE XFMR 1:1 335.2UH	0
HX2260NL PulseLarsen Antenna	XFRMR MODUL 1PORT POE 1:1 10/100	0
E2023FNLT PulseLarsen Antenna	XFRMR LAN ISOL 10BASET 1:2.5 SMD	0
23Z91SMNL-T PulseLarsen Antenna	XFRMR AUI ETHERNET LAN 16SOIC	0
H1197FNL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	0
HX6098FNLT PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 120UH	4062
PE-65726NL PulseLarsen Antenna	TRANSFORMER 2000VRMS 200UH SMD	0
H2009NL PulseLarsen Antenna	MODULE XFRMR VOIP DL LAN 24-SOIC	384
PA2531NL PulseLarsen Antenna	PULSE XFMR 4.5UH	388
H1086NLT PulseLarsen Antenna	XFRMR MODULE 1PORT 1:1 10/100	524
PA3855.005NL PulseLarsen Antenna	PULSE XFMR 21UH	0
HX1178NLT PulseLarsen Antenna	XFRMR MODULE 1PORT 1:1 10/100	654
PA1276NLT PulseLarsen Antenna	XFRMR 12V 13.5W 77.4UH POE EP13	473

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