Pulse Transformers

Part Number	Description / PDF	Quantity
GDE25-2 Triad Magnetics	TRANSF .650 OHM DUAL GATE DRIVE	1167
HX2326NL PulseLarsen Antenna	MODULE 10/100B-T POE SMD	1789
H1102NLT PulseLarsen Antenna	XFRMR MAGNETIC 1PORT 1:1 10/100	7381
ITRB-0249-D101 Schurter	ITRB PULSE TRANSFORMER THT 0.1A	1405
78613/3MC-R Murata Power Solutions	PULSE XFMR 1CT:1 200UH	0
H5020NL PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT 2PORT	422
YLTH48701T Trigon Components	TRANSFORMER ETHERNET LAN 10G	0
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
77204C Murata Power Solutions	PULSE XFMR 1:1 4MH	0
ITRA-0249-D104 Schurter	ITRA PULSE TRANSFORMER THT 0.1A	33
10GB-6014T PulseR (iNRCORE	LAN MODULE XFRMR 10GBASE-T SMD	0
B78476A8135A003 TDK EPCOS	PULSE XFMR 1CT:1CT 350UH	2321
74930000 Würth Elektronik Midcom	XFRMR 1:1 350UH SUPER TINY SMD	542
HM1225NL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	0
PA1138NLT PulseLarsen Antenna	XFRMR 12V 13.5W 127UH POE EP13	19501950
1000B-5001FXT PulseR (iNRCORE	XFMR MODULE SNGL 1000BT SMT PBC	1151
750110007 Würth Elektronik Midcom	TRANS ANALOG MODE SMART DAA SMD	0
S558-5999-Z6-F Bel Fuse, Inc.	XFRMR MODULE LAN 10/100BT 16P SM	0

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