STE develops capacitors, varistors and thermistors through in-house materials research, product design and testing. A provincial engineering research center, a CNAS-accredited test center and a UL WTDP laboratory support that work. STE is recognized under China’s national “Little Giant” program.
The part is decoded from its maker’s own ordering rules, then matched against STE parts with every difference and open check listed. Paste a whole BOM to check up to 50 parts at once, then download or share the results.
The film follows safety capacitors, varistors and NTC thermistors through the main production and test steps.
From power supplies and appliances to industrial and automotive electronics: components for EMI suppression, surge protection and temperature sensing.
4 product lines · 55 series · 17,903 part numbers
EMI suppression in power supplies and appliances, plus medium- and high-voltage industrial circuits.
9 series · 4,582 part numbersInput EMI suppression, power filtering and DC-link support in solar and energy-storage inverters.
24 series · 8,419 part numbersSurge protection at the power input, absorbing transient overvoltages in appliances and industrial equipment.
7 series · 3,345 part numbersInrush current limiting, temperature sensing and compensation, and overcurrent or overload protection.
15 series · 1,557 part numbers
SMD ceramic capacitors, varistors and thermistors
7 series · 301 part numbers
Capacitors and varistors for automotive electronics. AEC-Q200 qualification reports and qualified part numbers on request.
6 series · 396 part numbersSMD and automotive series are included in the product lines above.
X2 and Y capacitors in the input EMI filter; NTC thermistors for inrush current limiting; varistors for surge protection at the AC input.
Film and ceramic safety capacitors for mains filtering and interference suppression; varistors to absorb surges at the power input; NTC thermistors for temperature sensing.
DC-link film capacitors to support the DC bus; medium- and high-voltage ceramic capacitors at high-voltage nodes; varistors for surge protection.
Automotive series: CY-A, CE-A, MPX/X2-A, MPK/X1-A, MPY/Y2-A and Q-A.
DC-link film capacitors on the DC side of solar and storage inverters; varistors for surge protection on the AC side.
Approval scope as stated on each certificate.
ULUL recognition for selected series; laboratory in the UL Witnessed Test Data Program for UL 1449 and UL 60384-14
VDEVDE certificates for selected series
ENECENEC certificates for selected series
CQCCQC certificates for selected series
Automotive quality management system certification
Test center accredited by CNAS to ISO/IEC 17025
Product releases, new approvals and trade-fair dates.
STE showed passive components for automotive, energy, industrial automation, communications and high-power-density applications at electronica China 2026 in Shanghai on 1–3 July.
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STE showed passive components for photovoltaic, energy-storage and new-power-system applications at SNEC PV+ 2026 in Shanghai.
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STE showed capacitors, varistors and thermistors for power conversion, renewable energy, charging infrastructure and industrial electronics at PCIM Europe 2026 in Nuremberg.
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Songtian Science and Technology Park, Shantou (aerial view)R&D and production share one 75,000 m² site: Songtian Science and Technology Park in the Shantou Bonded Zone, with an east and a west campus.
Tell us the series or part number, the application and your annual volume. STE sales will reply by email.
