Pulse Transformers

Part Number	Description / PDF	Quantity
78602/4C Murata Power Solutions	PULSE XFMR 1:1:1 67UH	0
76600/1C Murata Power Solutions	PULSE XFMR 1:1 1.92MH	50
B8846NL PulseLarsen Antenna	PULSE XFMR ADSL2 ETSI-B	0
EX2024FNLT PulseLarsen Antenna	PULSE XFMR 1CT:2.5CT 1CT:1CT	13
H1260FNLT PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	1648
10GB-6013 PulseR (iNRCORE	LAN MODULE XFRMR 10GBASE-T SMD	0
QC1553-82 PulseR (iNRCORE	TRANSFORMER PBC	0
SMQC1553-45 PulseR (iNRCORE	TRANSFORMER PULSE DUAL RATIO	24
TLA-6T404 TDK Corporation	XFRMR FOR BCM5208,5203 CS 40SOP	0
ALAN-1002 Abracon	PULSE XFMR 1CT:1 350UH	0
G505 Tamura	TRANSFORMER 5.0MH 2:1:1 PULSE	0
MGDT100125 Vishay / Dale	PLANAR GATE-DRIVE XFMR, 1 : 1.25	57
EX2024FNL PulseLarsen Antenna	PULSE XFMR 1CT:2.5CT 1CT:1CT	0
H7029FNLT PulseLarsen Antenna	10GBASE-T DISCRETE 4CH MAR/SOL P	2750
H4807CG Mentech Technology USA Inc.	QUAD LAN XFMR 10/100 BASE-T	300
YLTH24P01T Trigon Components	PULSE TRANSFORMER LAN 10G	20
1002C Murata Power Solutions	TRANSFORMER PULSE 1:1:1 200VUS	1974
100B-1001NLT PulseR (iNRCORE	EXTMP XFMR 100BT SMG COM RPB	0
749010012A Würth Elektronik Midcom	WE-LAN 10/100 BASE-T SMT TRANSFO	604
PA1277NLT PulseLarsen Antenna	XFRMR 3.3V 10W 20.4UH POE EP10	38456

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