Pulse Transformers

Part Number	Description / PDF	Quantity
B78476A1889A003 TDK EPCOS	MODULE MAGNETIC LAN 2-PORT SMD	396
10GB-6012XNL PulseR (iNRCORE	LAN MODULE XFRMR 10GBASE-T SMD	0
H1174FNL PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	0
YLTH96402-1PU Trigon Components	PULSE TRANSFORMER LAN 2.5G/5G	0
T1144NLT PulseLarsen Antenna	XFRMR 1CT:1CT/1CT:2.4CT 1/1MH	827
PE-65948NL PulseLarsen Antenna	XFRMR 1CT:1CT FOR ECHELON/NEURON	471
HX0068ANLT PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	7169
S560-6600-DJ-F Bel Fuse, Inc.	MODULE XFRMR LAN SHDSL ISOL SMD	4460
76601/24HVC Murata Power Solutions	PULSE XFMR 1:1 11.7MH	47
H0013NL PulseLarsen Antenna	MODULE MAGNETIC LAN 1:1 10/100	34
TP-105-PIN Metelics (MACOM Technology Solutions)	TRANSFORMER,WIDE-BAND	10
SMG1553-60 PulseR (iNRCORE	TRANSFORMER 1553 SINGLE PBC	0
HM1193NL PulseLarsen Antenna	XFMR MDL 100BASE-T SMT AEC-Q200	280
1000B-5001FXNLT PulseR (iNRCORE	XFMR CHOKE SHUNT QUAD 100 RPB	0
78601/16C Murata Power Solutions	TRANSFORMER 1:1:1 5000UH 28VUS	155
ALAN-2401 Abracon	PULSE XFMR 1CT:1CT 120UH	0
78601/3JC Murata Power Solutions	PULSE XFMR 1:1 150UH	74
PE-64952NL PulseLarsen Antenna	XFRMR 1:2CT/1:1.36 1.2/1.2MH T/H	0
100B-1003X PulseR (iNRCORE	TRANSFORMER 10/100BASE SINGLE	2908
B78416A2386A003 TDK EPCOS	EP6 SMD TRANSFORMER	450

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