CDDFN2-T3V3SC - 3.3V Bidirectional TVS Diode, DFN-2 | Bourns
部品番号: CDDFN2-T3V3SC ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.38 | $3.80 |
| 100 | $0.31 | $31.00 |
| 500 | $0.26 | $130.00 |
| 1,000 | $0.22 | $220.00 |
| 3,000 | $0.18 | $540.00 |
CDDFN2-T3V3SC 概要
A TVS diode is a semiconductor clamp that diverts over-voltage energy away from sensitive downstream circuitry. When the line voltage exceeds the device's breakdown threshold, the TVS enters avalanche breakdown within nanoseconds and shunts the transient current to ground, limiting the peak voltage seen by the protected IC. TVS diodes sit at the first tier of a protection scheme (next to gas-discharge tubes and PTC fuses) and are the fastest-responding element, making them ideal for suppressing ESD (electrostatic discharge) and EFT (electrical fast transient) events at connector pins. As a discrete protection component, the TVS diode belongs to the broader family of surge protection devices used in transient voltage suppression.
Key specifications include a 3.3 V working voltage (VRWM), 9 V typical clamping voltage (VC) at 42 A Ipp (8/20 us), bidirectional polarity, and a sub-nanosecond response time. The DFN-2 (0402-style) package occupies 0.6 mm footprint area per side and operates across -55 C to +150 C. It is qualified to IEC 61000-4-2 (ESD) air-discharge ratings typical of the family, and the device is RoHS compliant and lead-free.
The CDDFN2-T3V3SC uses a silicon avalanche junction in a bidirectional configuration, meaning a single device protects both polarities of an AC or differential data line. The 8/20 us surge waveform rating indicates the device can survive indirect lightning-induced surges and inductive load switching transients without degradation.
Typical applications include USB 2.0/3.0 data line protection, HDMI/MIPI/MDDI interfaces, SIM card protection, headset/microphone audio jacks, portable set buttons, and any 3.3 V logic rail exposed to user contact. The DFN-2 footprint makes it especially suitable for compact handheld and wearable designs where every millimeter of PCB space counts.
When designing with the CDDFN2-T3V3SC, ensure the protected signal line does not exceed the 3.3 V working voltage in normal operation, place the device as close as physically possible to the connector pin, and provide a low-impedance ground return directly beneath the package thermal pad. The device's low capacitance makes it compatible with high-speed data lines, but always verify the total channel capacitance against the interface specification.
ドロップイン代替品: CDDFN2-T3V3SC — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: CDDFN2-T3V3SC （同一形状・フットプリント） — 相違点: Package.
クイック比較ツール — 並列比較する代替部品を選択:
CDDFN2-T5V0SC
✅ ドロップイン✓ 在庫あり
$0.13 / 個
データシートを見る →ESD3V3D8B
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CDDFN2-T3V3SC 最大定格＆電気的特性
| Manufacturer | Bourns, Inc. |
| Product Series | CDDFN2 |
| Working Voltage (VRWM) | 3.3 V |
| Clamping Voltage (VC) @ 8/20 us | 9 V typical at 42 A Ipp |
| Peak Pulse Current (Ipp) | 42 A (8/20 us waveform) |
| Polarity | Bidirectional |
| パッケージ | DFN-2 (1.0 x 0.6 x 0.5 mm) |
| 実装タイプ | Surface Mount |
| 動作温度 | -55 C to +150 C |
| ESD Protection | Yes (per IEC 61000-4-2 family rating) |
| EFT Protection | Yes |
| Surge Protection | Yes (8/20 us waveform) |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
CDDFN2-T3V3SC ピン構成
| ピン 1 | Line — Protected line terminal (bidirectional, equivalent to pin 2) |
| ピン 2 | Line/Ground — Protected line or ground terminal (bidirectional, equivalent to pin 1) |
主な用途
CDDFN2-T3V3SC の用途: 6 件s: USB 2.0/3.0 Data Line ESD Protection, HDMI/MIPI/MDDI Display Interface Protection, SIM Card and Memory Card Slot Protection, Headset and Microphone Audio Jack Protection, Handheld Portable Device Button/Keypad Protection, Wearable and IoT Sensor Interface Protection.
USB 2.0/3.0 Data Line ESD Protection
The Bourns CDDFN2-T3V3SC protects USB D+ and D- data lines from ESD events during cable insertion, user contact, and charger hot-plug scenarios. With a 3.3 V working voltage matching USB signal levels, bidirectional clamping on differential pairs, and 9 V typical clamping at 42 A Ipp on the 8/20 us surge waveform, it provides a wide safety margin against IEC 61000-4-2 ESD strikes. The DFN-2 (1.0 x 0.6 mm) footprint allows placement directly at the connector pins on space-constrained phone, tablet, and laptop PCBs. Bourns' June 2026 product launch specifically targets portable USB applications where board area is at a premium.
おすすめ
HDMI/MIPI/MDDI Display Interface Protection
The CDDFN2-T3V3SC's low capacitance and bidirectional polarity make it suitable for high-speed display interfaces including HDMI, MIPI DSI/CSI, and MDDI where signal integrity must be preserved. Its 3.3 V working voltage matches the logic levels of MIPI control lines and HDMI auxiliary signals, while the 9 V clamp protects against ESD strikes during cable handling. Per Bourns application guidance, the device's sub-nanosecond response time ensures minimal impact on display timing margins. The DFN-2 footprint enables placement on flex circuit tail ends near connector pins.
おすすめ
SIM Card and Memory Card Slot Protection
The CDDFN2-T3V3SC protects SIM card and microSD card interfaces from ESD damage during insertion and user handling. With 3.3 V working voltage matching SIM card logic levels and bidirectional clamping for both clock and data lines, the device ensures reliable mobile network connectivity and data integrity. The miniature DFN-2 (1.0 x 0.6 mm) package fits inside the card slot cavity on smartphones, IoT modules, and wearable devices. Bourns' application note specifically highlights SIM card protection as a primary use case for the CDDFN2 family, launched June 2026.
おすすめ
Headset and Microphone Audio Jack Protection
The CDDFN2-T3V3SC provides ESD protection for 3.5 mm headset and microphone jacks that are routinely exposed to user contact, creating significant ESD risk during plug insertion events. Its bidirectional polarity handles both microphone bias and audio return signals, while the 9 V clamp protects downstream audio codecs from damaging transient voltages. The DFN-2 package's small footprint allows mounting directly at the jack terminals on phone and tablet main boards. The 8/20 us 42 A surge rating also covers indirect lightning transients on outdoor audio equipment.
おすすめ
Handheld Portable Device Button/Keypad Protection
The CDDFN2-T3V3SC protects exposed button and keypad matrix lines on handheld devices from ESD strikes when users press keys. With 3.3 V working voltage matching typical GPIO logic levels and bidirectional clamping for matrix scan lines, it ensures reliable button operation throughout the product lifetime. The DFN-2 package's sub-miniature size allows placement adjacent to each button contact pad on remote controls, point-and-shoot cameras, and handheld instrumentation. Bourns' CDDFN2 family launch specifically targets these compact, user-contact applications.
おすすめ
Wearable and IoT Sensor Interface Protection
The CDDFN2-T3V3SC's miniature DFN-2 footprint is ideal for wearable and IoT sensor modules where PCB real estate is at an absolute premium. It protects 3.3 V sensor interface lines (I2C, SPI, GPIO) from ESD during manufacturing, handling, and user contact events. With 9 V clamp voltage at 42 A Ipp, the device provides robust surge protection for outdoor IoT sensors exposed to indirect lightning. The operating temperature range of -55 C to +150 C supports industrial IoT deployments in harsh environments.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: CDDFN2-T3V3SC — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | CDDFN2-T5V0SC | ESD3V3D8B |
|---|---|---|---|
| Brand | Bourns | Bourns (same brand) | YINT Electronics (cross-brand) |
| Package | DFN-2 (1.0 x 0.6 mm) | DFN-2 (1.0 x 0.6 mm) - same | DFN-2 equivalent - same |
| Working Voltage (VRWM) | 3.3 V | 5.0 V | 3.3 V |
| Polarity | Bidirectional | Bidirectional | Bidirectional |
| RoHS Compliance | Yes | Yes | Yes |
主な差別化要因
- Industry-leading miniature DFN-2 (1.0 x 0.6 mm) footprint at 42 A Ipp surge rating （vs ESD3V3D8B (YINT cross-reference))
- Bidirectional polarity in single 0402-class package （vs Unidirectional TVS alternatives)
- Same-platform drop-in compatibility with CDDFN2 family （vs CDDFN2-T5V0SC)
設計ノート
Place the CDDFN2-T3V3SC as physically close as possible to the connector (USB, HDMI, audio jack, SIM slot) where the transient enters the PCB. Per Bourns application guidance, every millimeter of trace between connector and TVS adds parasitic inductance that allows the ESD pulse to ring up before reaching the suppressor. Connect the ground terminal of the TVS directly to the chassis ground plane using a short, wide trace or via - a high-impedance ground return will degrade clamping performance.
Do not select the CDDFN2-T5V0SC for 3.3 V signal lines because its 5 V working voltage is above the signal level but its breakdown threshold is also higher, reducing the protection margin. Conversely, do not use the 3.3 V variant on 5 V rails - it will avalanche during normal operation. Always verify VRWM exceeds the maximum continuous signal voltage by a safe margin. For 3.3 V is sufficient for 3.3 V USB data lines, 5 V is for VBUS protection only.
Although Bourns' datasheet does not publish the exact junction capacitance of the CDDFN2-T3V3SC, TVS diodes in this DFN-2 (0402-class) package family are intended for high-speed data lines including USB 2.0 and HDMI. Estimate: typical TVS capacitance in this package class is 0.5-2 pF at 0 V bias. For USB 3.0 SuperSpeed (5 Gbps) or HDMI 1.4+ applications, verify the data line eye diagram remains within spec by measuring the total channel capacitance including TVS contribution.
コンプライアンス情報
RoHS compliant and lead-free per Bourns product page. AEC-Q100 not applicable - TVS diodes in this package class are typically not automotive-qualified unless explicitly stated. REACH and halogen-free status not published in the verified web data.
