Electronic Coils, Transformers & Other Inductors
3 tracked issuers filing with the SEC under this industry classification.
Issuers
3
Filings
40
SIC Code
3677
Industry Overview
Electronic Coils, Transformers & Other Inductors
Electronic Coils, Transformers & Other Inductors producers in SIC 3677 design magnetics that manage power conversion, signal integrity, and filtering for automotive EV platforms, aerospace avionics, medical devices, industrial automation, telecom/5G gear, consumer electronics, and renewable energy inverters. Core products span surface-mount inductors, common-mode chokes, current sensors, and custom high-frequency transformers, often paired with design services to meet EMI, thermal, and reliability specs. Typical customers demand tight tolerance, low loss, and compact footprints, driving investment in ferrite and powder materials, automated winding, and co-development with wide-bandgap SiC/GaN power stages. Major risks include copper and rare-earth price volatility, trade and export controls, UL/IEC safety certifications, RoHS/REACH substance compliance, and liability from field failures or recalls. 2024–2025 trends center on miniaturization for wearables, higher efficiency for fast chargers and data centers, grid-hardening components for storage and solar, and reshoring to improve supply resilience. For ongoing disclosures and competitive signals, view live SEC filings on Earnings Feed.
Source: Earnings Feed research · 11/23/2025
Latest Filings
- 8-KBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 8-K
Dec 3, 1:43 PM ET236.9 KB - 8-KBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 8-K
May 1, 10:31 AM ET136.2 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Mar 2, 2:18 PM ET8.9 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Aug 29, 9:49 AM ET8.4 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Aug 18, 10:40 AM ET5.2 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Aug 8, 10:16 AM ET1.2 MB - 8-KBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 8-K
Jul 27, 9:44 AM ET161.6 KB - 8-KTOROTEL INC
TOROTEL INC 8-K
Jul 12, 5:39 PM ET7.4 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Jul 7, 7:01 PM ET5.2 KB - SC 13GBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G
Apr 25, 1:04 PM ET9.2 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Aug 10, 4:57 PM ET20.3 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Aug 9, 4:21 PM ET473.1 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Nov 13, 4:20 PM ET157.3 KB - 3TOROTEL INC
TOROTEL INC 3
Oct 6, 2:15 PM ET3.6 KB - 3TOROTEL INC
TOROTEL INC 3
Oct 6, 2:15 PM ET3.6 KB - 8-KTOROTEL INC
TOROTEL INC 8-K
Oct 1, 10:01 AM ET45.7 KB - 8-KTOROTEL INC
TOROTEL INC 8-K
Sep 22, 4:31 PM ET14.1 KB - 8-KTOROTEL INC
TOROTEL INC 8-K
Sep 15, 11:18 AM ET93.0 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Sep 12, 12:21 PM ET8.6 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Sep 10, 1:27 PM ET14.0 KB - 4/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4/A
Sep 2, 2:47 PM ET7.8 KB - 4BEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 4
Aug 29, 1:36 PM ET26.9 KB - 8-KBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 8-K
Aug 4, 3:17 PM ET14.5 KB - 8-KTOROTEL INC
TOROTEL INC 8-K
Jul 25, 9:46 AM ET157.3 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Feb 7, 4:47 PM ET85.0 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Feb 7, 3:47 PM ET85.0 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Jan 31, 9:27 AM ET11.4 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Nov 12, 9:45 AM ET83.4 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Nov 12, 9:07 AM ET10.6 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Aug 12, 2:13 PM ET73.6 KB - 8-K/ATOROTEL INC
TOROTEL INC 8-K/A
May 29, 9:28 AM ET119.3 KB - 8-KTOROTEL INC
TOROTEL INC 8-K
Apr 4, 7:00 PM ET11.6 KB - 10-KBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-K
Mar 27, 7:00 PM ET152.3 KB - SC 13GBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G
Feb 12, 7:00 PM ET9.1 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Feb 11, 7:00 PM ET7.4 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Feb 11, 7:00 PM ET7.4 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Nov 8, 7:00 PM ET56.7 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Oct 8, 8:00 PM ET18.7 KB - 10-QBEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ 10-Q
Aug 9, 8:00 PM ET50.1 KB - SC 13G/ABEL FUSE INC /NJ$BELFA
BEL FUSE INC /NJ SC 13G/A
Aug 6, 8:00 PM ET18.4 KB
Featured Issuers
3Classification
- SIC Code
- 3677
- Total Issuers
- 3
- Recent Filings
- 40