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STE Components Reported in Geely and StarCharge EV Chargers

Original report

STE edition

Adapted from Chongdiantou

Chongdiantou identifies STE ceramic capacitors and a varistor in two EV charging products, with a source marking discrepancy retained.

Chongdiantou's February 2025 report documents STE components in a Geely portable DC charger and a StarCharge AC charging station. The observations concern the units examined in the underlying teardowns. They identify component use; they do not establish a current supply agreement or demonstrate that an individual component determines a complete charger's safety, efficiency or reliability.

Geely 2 kW portable DC charger

The first case is the portable DC charger described for the Geely Panda mini electric vehicle. Chongdiantou reports a total weight of 4.8 kg, an approximately 2.9 m input cable and a 1.5 m output cable. The reported electrical range is 175–265 VAC input and 250–500 VDC output, with a maximum output current of 5.5 A. Those output limits should not be multiplied to infer a continuous power rating beyond the product's stated 2 kW rating.

The article describes two cooling fans and an IP66 enclosure rating. These are characteristics of the reported charger, separate from the ratings of the components inside it.

STE varistor: an unresolved marking discrepancy

The source identifies a STE varistor for overvoltage surge absorption. Its subsection heading names 14D561K, while the next paragraph says the device is marked 14D471K. Both identifiers are preserved here because the written source is inconsistent. The photograph and underlying teardown should be checked before a specific part is entered into a bill of materials or product selection record.

The article also describes STE's wider varistor offering: a broad voltage range, nonlinear and approximately symmetrical voltage–current behavior, fast response, and versions for adapters, appliances, industrial controls and communications equipment. It names CQC, VDE and UL approvals at portfolio level. These statements should be read as the source's description of the product range, not as confirmation that every rating or approval applies to the photographed part.

STE CD-series ceramic Y capacitor

The Geely charger also contains a blue STE CD-series ceramic Y capacitor. The report describes a high-permittivity ceramic dielectric with flame-retardant epoxy encapsulation. It lists 250 VAC, 400 VAC, 500 VAC and 1,500 VDC options in its family overview, together with RoHS, REACH and bromine-/halogen-free statements. Those values are the article's family-level description, not a verified rating of this particular installed capacitor.

The reported applications include power-circuit noise suppression, antenna coupling, bridging and bypass circuits. Selection for a safety-related position still requires the exact type, applicable safety class, approval and circuit conditions.

StarCharge 7 kW smart AC charging station

The second case is StarCharge's compact Chenxing smart AC charging station. The source describes 220 V operation and 7 kW charging, a −40 to +65°C operating range and an IP55 protection rating.

It also reports protective functions, operating- and fault-state detection, energy metering and billing, and coordinated control. Supported control or authorization methods include a mobile app, Bluetooth, phone NFC, QR-code scanning and a card. These details describe the charging station covered at the time of publication.

Inside this product, Chongdiantou identifies another blue STE CD-series Y capacitor. The source refers readers to the same family description given in the Geely section rather than supplying an additional installed-part rating.

Company and exhibition context

The original includes a historical notice for STE's participation at the Spring 2025 Asia Charging Expo on March 28, at stands A35–A36. It describes STE’s Shantou bonded-zone company, established in 2012, and reports a 75,000 m² manufacturing and development site.

The company profile covers ceramic and film capacitors, varistors and thermistors; provincial and municipal engineering centers; two UL-recognized laboratories; and ISO 9001, IATF 16949 and ISO 14001 management systems. It also names product approvals from CQC, UL, VDE, KTL, ENEC and CB. These remain dated source statements, with scope and current status dependent on the corresponding certificates.

The article closes by discussing STE's intended role in EV charging and other power applications. Its underlying teardown links and related reports on portable power stations, PD3.1 chargers and SMD safety capacitors are retained in the source-link record.

Figures and tables from the original report

The following figures retain their original captions, markings and historical context. Transcribed tables present the values shown in the published images; product selection should use the specifications for the selected part.

Illustration from the original report — source figure 1
Figure 1. Illustration from the original report. Image: Chongdiantou. Image source
Illustration from the original report — source figure 2
Figure 2. Illustration from the original report. Image: Chongdiantou. Image source
Illustration from the original report — source figure 3
Figure 3. Illustration from the original report. Image: Chongdiantou. Image source
Illustration from the original report — source figure 4
Figure 4. Illustration from the original report. Image: Chongdiantou. Image source
Illustration from the original report — source figure 5
Figure 5. Illustration from the original report. Image: Chongdiantou. Image source
Illustration from the original report — source figure 6
Figure 6. Illustration from the original report. Image: Chongdiantou. Image source

Related reading cited by the original report

Chinese source titles are retained below. 拆解报告：GEELY吉利2kW便携式直流充电机 拆解报告：StarCharge星星充电7kW智能交流充电桩 正浩、隆鑫两家知名户外电源品牌齐选松田元件 行业首家通过VDE认证的小型化安规方案，松田电子带来SMD-X1Y1贴片Y电容 盘点获公牛、绿联两家知名品牌PD3.1快充采用的松田元件 松田 SMC X1Y2 陶瓷电容器详解，为电子行业高效生产及性能提升赋能 百款设备的共同选择，一文看懂松田元件历年拆解案例

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