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STE Safety Components in Chargers and Appliances Reported in July 2025

Original report

STE edition

Adapted from Chongdiantou

A July 2025 Chongdiantou roundup groups reported STE component use across power adapters, appliances and portable power equipment.

Chongdiantou's July 2025 review organizes reported STE component use into the product groupings in this report, from surface-mount safety capacitors to inrush-limiting thermistors and varistors. The equipment spans phone and computer chargers, robot power supplies, charging stations, portable power products and household appliances.

The following inventory preserves every application entry in the source. It records the publisher's category assignments rather than independently verified ordering codes. C means USB-C and A means USB-A. Names without a confirmed English market equivalent use romanized source labels.

Surface-mount Y1 safety capacitors

The report describes a lower-profile package than conventional leaded Y capacitors, flame-retardant epoxy encapsulation and tape-and-reel packaging. Its manufacturing discussion concerns compatibility with automated assembly; it does not provide a comparative production study. The two listed applications are:

  1. BULL 45 W USB-C GaN charger
  2. Motorola 90 W USB-C charger

X2 safety capacitors

The historical family overview lists 275, 305, 310, 330 and 350 VAC options. It discusses interference suppression across the supply lines and capacitive-dropper applications, together with UL94 V-0, RoHS, REACH and halogen-related claims. The exact construction, intended function and supporting approvals remain variant-specific. Listed equipment:

  1. GPD computer original 100 W GaN charger
  2. Huawei Pura X original 66 W Bing Tang GaN charger
  3. Unitree robot 302.4 W charger
  4. Motorola 90 W USB-C charger
  5. OPPO 100 W Xiaofangping GaN charger
  6. Huntkey 240 W three-C GaN charger
  7. Guozili 50 W dual-C GaN charger
  8. Baseus 67 W three-C GaN charger with retractable cable
  9. Baseus 67 W 10000 mAh power bank with display
  10. REDMAGIC 65 W Deuterium Energy Cube mini
  11. Huawei 100 W multiport charger

CD ceramic Y1 capacitors

Chongdiantou describes the CD family as using a high-permittivity ceramic dielectric and flame-retardant epoxy encapsulation. The article lists 400 and 500 VAC options and associates the family with noise suppression, coupling and bypass applications. Its case list includes:

  1. Beishida K46 45 W USB-C GaN charger
  2. Motorola 50 W 1A1C charger
  3. ARRIS 5 W Ethernet adapter
  4. StarCharge 7 kW AC charging station
  5. Lenovo 45 W USB-C charger
  6. Unitree robot 302.4 W charger
  7. Beishida 45 W USB-C charger described as integrated fast charging
  8. Xiaomi 15 Pro original 90 W GaN charger

CE ceramic Y2 capacitors

The section heading identifies CE, but its first descriptive sentence names CD. This adaptation preserves the CE application grouping while withholding that ambiguous parameter block. It should not be used to establish a CE or CD rating without the exact datasheet. Equipment listed under the CE heading:

  1. Dyson 53.4 W DC adapter
  2. Ninebot 160 W lithium-battery e-bike charger described as meeting the new Chinese standard
  3. Ninebot 1080 W e-bike charger described as meeting the new Chinese standard
  4. Jackery 2 kWh portable power station

CBB21B boxed film capacitors

The source describes a plastic-cased metallized polypropylene family, citing self-healing behavior, high insulation resistance and low high-frequency loss. Its overview lists 0.01–10 µF, an operating range of −40 to +105 °C and storage at 15–35 °C. Those family-level statements do not identify every available combination. The listed application is:

  1. EcoFlow RIVER 3 Plus 600 W 286 Wh portable power station

MF72 thermistors

MF72 thermistors are presented for inrush-current limiting in power-conversion, switching and UPS applications. The report lists disc diameters from 5 to 20 mm. It does not provide the exact thermistor code or operating conditions for each equipment entry:

  1. Panasonic 1200 W hair dryer
  2. BULL 20 W 2A1C GaN extension power strip

Varistors

The article describes varistors for transient overvoltage protection in adapters, appliances, industrial equipment and communications products. It mentions CQC, VDE and UL approvals at family level. An application assessment must establish which approval and pulse conditions apply to the specific part. Its eight examples are:

  1. Huntkey EasyCombo 6S USB extension power strip
  2. Xiaomi 120 W 3C1A GaN charger
  3. Panasonic 1200 W hair dryer
  4. Wofu Xiaohuatong high-speed hair dryer
  5. IKEA SJÖSS 45 W dual-port charger
  6. Mijia 1600 W high-speed hair dryer
  7. HONOR 66 W SuperCharge charger
  8. Huawei 100 W Bing Tang GaN charger

Scope of the report

Together, the entries show how Chongdiantou distributed its reported observations across STE product families. Several products appear more than once because the article associates them with more than one category. These appearances should not be counted as separate equipment designs.

The original introduction also presents historical company and laboratory credentials. This adaptation focuses on the product and equipment coverage rather than treating those broad statements as current certification evidence. The source's further-reading section links a separate STE surface-mount Y capacitor introduction.

For engineering use, follow the original teardown, confirm the component marking and obtain the relevant current specification. Neither the presence of a brand name nor the use of a component in one sample establishes endorsement, production volume or a measured reliability advantage.

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
Illustration from the original report — source figure 7
Figure 7. 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：公牛45W USB-C氮化镓快充充电器 拆解报告：摩托罗拉90W USB-C快充充电器 拆解报告：GPD电脑原装100W氮化镓充电器 拆解报告：华为Pura X原装66W冰糖全能氮化镓充电器 拆解报告：Unitree宇树智能机器人302.4W充电器 拆解报告：OPPO 100W小方瓶超级闪充氮化镓充电器 拆解报告：航嘉240W 3USB-C氮化镓充电器 拆解报告：果子理50W双USB-C氮化镓充电器 拆解报告：倍思67W 3USB-C伸缩线氮化镓充电器 拆解报告：倍思67W 10000mAh超能充数显移动电源 拆解报告：红魔65W氘锋能量块mini 拆解报告：华为100W全能充多口充电器 拆解报告：倍仕达45W USB-C氮化镓快充充电器K46 拆解报告：摩托罗拉50W 1A1C快充充电器 拆解报告：ARRIS艾锐势5W以太网适配器 拆解报告：StarCharge星星充电7kW智能交流充电桩 拆解报告：联想45W USB-C快充充电器 拆解报告：倍仕达45W USB-C融合快充充电器 拆解报告：小米15 Pro标配90W氮化镓快充充电器 拆解报告：戴森53.4W DC电源适配器 拆解报告：九号160W电动自行车新国标锂电池充电器 拆解报告：九号1080W电动自行车新国标充电器 户外电源拆解报告：电小二极致安全2度电 拆解报告：正浩 睿 RIVER 3 Plus 600W 286Wh户外电源 拆解报告：松下电器1200W电吹风 拆解报告：公牛20W 2A1C氮化镓快充延长线插座 拆解报告：航嘉EasyCombo 6S USB延长线插座 拆解报告：小米120W 3C1A四口氮化镓充电器 拆解报告：喔夫小话筒高速吹风机 拆解报告：宜家 SJÖSS赫约斯45W双口快充充电器 拆解报告：米家1600W高速吹风机 拆解报告：荣耀66W超级快充充电器 拆解报告：华为100W冰糖全能氮化镓充电器 小身材，大能量，STE松田电子推出贴片Y电容

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