Advanced Circuit Protection

Devices and systems designed to protect electrical circuits from overcurrents, short circuits, and other faults, often involving rapid response, high voltage/current handling, and sophisticated interruption mechanisms.

5,305 US filings from 1,147 companies since 2023 · 2023: 1,524 · 2024: 1,566 · 2025: 1,539 · 2026 YTD: 676

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Top companies

Ranked by filings in this theme since 2023. 2026 is partial.

#	Company	Since 2023	2023	2024	2025	2026 YTD	YoY
1	Eaton Intelligent Power Limited	295	116	79	74	26	-6.3%
2	LS ELECTRIC CO., LTD.	180	51	62	52	15	-16.1%
3	ABB Schweiz AG	163	56	37	42	28	+13.5%
4	Siemens Aktiengesellschaft	127	29	48	36	14	-25.0%
5	Schneider Electric Industries SAS	116	16	36	40	24	+11.1%
6	Hubbell Incorporated	108	34	30	36	8	+20.0%
7	TEXAS INSTRUMENTS INCORPORATED	96	27	33	23	13	-30.3%
8	SCHNEIDER ELECTRIC USA, INC.	83	30	19	18	16	-5.3%
9	Mitsubishi Electric Corporation	72	24	27	17	4	-37.0%
10	Littelfuse, Inc.	69	21	23	18	7	-21.7%
11	Panasonic Intellectual Property Management Co., Ltd.	62	15	22	16	9	-27.3%
12	HITACHI ENERGY LTD	60	·	17	26	17	+52.9%
13	ROHM CO., LTD.	55	14	26	10	5	-61.5%
14	Huawei Digital Power Technologies Co., Ltd.	51	19	13	15	4	+15.4%
15	Siemens Industry, Inc.	49	10	11	21	7	+90.9%
16	DEXERIALS CORPORATION	46	9	13	18	6	+38.5%
17	S&C Electric Company	46	14	13	12	7	-7.7%
18	Infineon Technologies AG	43	17	6	13	7	+116.7%
19	SIEMENS ENERGY GLOBAL GMBH & CO. KG	43	14	16	4	9	-75.0%
20	HAMILTON SUNDSTRAND CORPORATION	42	14	12	14	2	+16.7%
21	Xiamen Hongfa Electric Power Controls Co., Ltd.	42	6	20	6	10	-70.0%
22	FUJI ELECTRIC CO., LTD.	40	12	11	12	5	+9.1%
23	Sumitomo Wiring Systems, Ltd.	40	6	10	16	8	+60.0%
24	JST POWER EQUIPMENT, INC.	38	18	13	6	1	-53.8%
25	AutoNetworks Technologies, Ltd.	37	4	9	16	8	+77.8%