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Vishay General Semiconductor - Diodes Division VESD12A1C-02Z-GS08
- Part No.:
- VESD12A1C-02Z-GS08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- SOD-923
- Datasheet:
-
VESD12A1C-02Z-GS08.pdf
- Description:
- TVS DIODE 12VWM 23VC SOD923
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
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Product details
Overview
VESD12A1C-02Z-GS08 from Vishay Semiconductors is a bidirectional asymmetrical (BiAs) ESD protection diode in SOD923 package, rated for 12 V reverse stand-off voltage, 30 kV IEC 61000-4-2 contact/air discharge immunity, 12.5 pF capacitance at 6 V, and 0.1 µA leakage at 12 V - deployed on high-speed data lines including USB 2.0 and HDMI interfaces.
For engineers reviewing the VESD12A1C-02Z-GS08 datasheet, VESD12A1C-02Z-GS08 pinout, VESD12A1C-02Z-GS08 application, or VESD12A1C-02Z-GS08 equivalent, key selection criteria include clamping asymmetry (VF ≈ 1.1 V forward / VC ≈ 20–23 V reverse at 4 A), ultra-low profile (0.4 mm height), and single-line protection capability in space-constrained portable electronics.
Technical Context
The VESD12A1C-02Z-GS08 operates in BiAs mode: pin 1 grounded, pin 2 connected to signal line; it provides high-impedance isolation below 12 V and switches to low-impedance conduction during transients. Its asymmetry enables tighter negative clamping near ground (VF = 1.1 V @ 1 A) while allowing higher positive clamping (VC = 20–23 V @ 4 A) to avoid false triggering.
This behavior stems from internal dual-diode architecture with distinct forward and reverse breakdown paths. It meets IEC 61000-4-2 (±30 kV) and IEC 61000-4-5 (4 A, 8/20 µs), with MSL level 1 rating and UL 94 V-0 molding compound - optimized for automated SMT assembly on consumer and industrial PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-off Voltage | 12 V - maximum continuous operating voltage before conduction begins; defines safe signal swing range for protected line. |
| ESD Immunity | ±30 kV contact & air discharge (IEC 61000-4-2) - ensures robustness against human-body-model ESD events in handheld devices. |
| Clamping Voltage (4 A) | 20–23 V reverse / 1.7–2.1 V forward - determines peak transient voltage seen by downstream IC; asymmetry protects logic thresholds. |
| Capacitance | 12.5 pF @ 6 V, 1 MHz - low enough for USB 2.0 (480 Mbps) and HDMI 1.4 signal integrity without excessive rise-time degradation. |
| Leakage Current | < 0.1 µA @ 12 V - minimizes standby power loss and avoids DC bias shift on sensitive analog or RF signal paths. |
| Package | SOD923 - 0.9 × 0.75 × 0.4 mm footprint; enables placement adjacent to connectors in ultra-thin mobile designs. |
| Operating Temp | −40 °C to +125 °C - supports automotive infotainment and industrial HMI applications with extended thermal cycling. |
Pinout & Package
SOD923 package: 2-terminal surface-mount device with cathode bar marking on pin 1 side; total height ≤ 0.4 mm; land pattern per Vishay doc S8-V-3880.05-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (ground reference) | Connected to system ground plane; serves as return path for both positive and negative ESD currents. |
| Pin 2 | Anode (signal line connection) | Connected directly to protected data line (e.g., USB D+, HDMI TMDS+); carries bidirectional transient current. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Asymmetrical Clamping | Enables sub-1.2 V negative clamping while maintaining >13.5 V reverse breakdown - preserves logic '0' margins without over-clamping '1' levels. |
| Ultra-Low Capacitance | 12.5 pF at 6 V bias - maintains signal integrity for high-speed interfaces up to 480 Mbps without added jitter or attenuation. |
| Tiny SOD923 Footprint | 0.9 mm × 0.75 mm area, 0.4 mm max height - fits within 0.5 mm clearance zones next to micro-B USB or mini-HDMI connectors. |
| High ESD Withstand | ±30 kV IEC 61000-4-2 - exceeds Level 4 immunity requirements for consumer electronics and medical handhelds. |
| Lead-Free & RoHS Compliant | Meets EU RoHS 2002/95/EC and WEEE 2002/96/EC - qualified for global commercial and industrial shipments without exemptions. |
Applications
| USB 2.0 Data Lines | HDMI TMDS Channels |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports in smartphones and OTG accessories against user-handling ESD. IC Role / Device Role / Timing Role: Single-line transient voltage suppressor placed within 3 mm of connector, clamping fast-rising ESD pulses before they reach PHY IC. Use Value: 12.5 pF capacitance prevents signal edge degradation at 480 Mbps; 0.4 mm height allows co-placement with shielded USB receptacles. | Use Scenario: Safeguarding TMDS+ and TMDS− differential pairs in portable projectors and docking stations. IC Role / Device Role / Timing Role: Per-lane ESD clamp mounted directly at HDMI Type A connector, minimizing stub length to preserve 165 MHz pixel clock integrity. Use Value: Asymmetrical clamping holds negative excursions near 0 V while limiting positive overshoot to <23 V - compatible with 3.3 V TMDS receiver input ranges. |
| Industrial Sensor Interfaces | Medical Wearable Data Ports |
Use Scenario: Shielding RS-485 or CAN FD data lines in factory-floor sensors exposed to charged-tool ESD events. IC Role / Device Role / Timing Role: Point-of-entry protection on isolated communication lines, coordinated with upstream common-mode chokes. Use Value: −40 °C to +125 °C operation ensures reliability in uncontrolled ambient environments; MSL level 1 simplifies reflow scheduling. | Use Scenario: ESD hardening of diagnostic port connectors (e.g., UART or SWD) on FDA-cleared wearable monitors. IC Role / Device Role / Timing Role: Final-stage protection before low-power MCU debug interface, preventing latch-up during clinical handling. Use Value: <0.1 µA leakage avoids battery drain in multi-year implantable-grade devices; RoHS/WEEE compliance supports global regulatory submissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD9B5.0ST5G | Unidirectional; 5 V VRWM; 15 pF @ 0 V; 30 kV ESD rating | Requires separate ground-referenced configuration; better suited for 3.3 V logic rails than 12 V signal lines | Select when protecting lower-voltage digital I/O with strict 0 V–3.3 V swing and no negative transients. |
| TPD2E001DRYR | Bidirectional; 5.5 V VRWM; 11 pF @ 0 V; ±8 kV IEC 61000-4-2 | Limited to consumer-grade ESD levels; not rated for ±30 kV; smaller 0.65 × 0.65 mm X2SON package | Choose for cost-sensitive, non-industrial USB ports where full ±30 kV immunity is not mandated. |
Compared with ESD9B5.0ST5G and TPD2E001DRYR, the VESD12A1C-02Z-GS08 uniquely supports 12 V signal rails with ±30 kV immunity and asymmetrical clamping - critical for legacy industrial interfaces and high-swing sensor buses where unidirectional or lower-rated alternatives risk false triggering or insufficient protection margin.
Availability
VESD12A1C-02Z-GS08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS channel hardening, and industrial RS-485 data line safeguarding requiring stable component supply across long-life production programs.
Supply support for VESD12A1C-02Z-GS08 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in power management, sensing, and circuit protection components with vertical manufacturing control.
The VESD12A1C-02Z-GS08 belongs to Vishay's BiAs ESD protection diode family, engineered specifically for high-speed data line protection where asymmetric voltage clamping and ultra-low capacitance are mandatory design constraints.
FAQ
What is the clamping behavior of the VESD12A1C-02Z-GS08 during positive and negative ESD events?
The VESD12A1C-02Z-GS08 exhibits bidirectional asymmetrical (BiAs) clamping: during negative transients (pin 1 → pin 2), it conducts in forward bias with VF ≈ 1.1 V @ 1 A; during positive transients (pin 2 → pin 1), it breaks down in reverse with VC ≈ 20–23 V @ 4 A. This asymmetry prevents false triggering on logic-high signals while tightly constraining negative excursions near ground - a key advantage over symmetrical TVS diodes in mixed-swing interfaces.
Can the VESD12A1C-02Z-GS08 be used to protect a 3.3 V I²C bus line?
No - the VESD12A1C-02Z-GS08 has a 12 V reverse stand-off voltage (VRWM), making it unsuitable for direct use on 3.3 V I²C lines where clamping would occur during normal high-level signaling. For 3.3 V buses, a device with VRWM ≤ 3.6 V (e.g., VESD05A1C-02Z) is required. Using VESD12A1C-02Z-GS08 here risks signal corruption and increased bus capacitance beyond I²C timing limits.
What is the maximum peak pulse current the VESD12A1C-02Z-GS08 can handle per IEC 61000-4-5?
The VESD12A1C-02Z-GS08 is rated for 4 A peak pulse current (IPPM) under IEC 61000-4-5 8/20 µs waveform conditions. At this current, its reverse clamping voltage reaches 20–23 V, and forward clamping rises to 1.7–2.1 V. This rating applies to single-shot events; repeated surges require derating per Vishay's thermal dissipation guidelines in the datasheet.
Is the VESD12A1C-02Z-GS08 compatible with lead-free reflow soldering processes?
Yes - the VESD12A1C-02Z-GS08 is qualified for lead-free reflow with a maximum terminal temperature of 260 °C for 10 seconds, per J-STD-020 MSL level 1 classification. Its SOD923 package uses UL 94 V-0 compliant molding compound and meets RoHS 2002/95/EC requirements, enabling compatibility with standard Pb-free SAC305 profiles without delamination or parametric shift.
How does the capacitance of the VESD12A1C-02Z-GS08 vary with applied reverse voltage?
The VESD12A1C-02Z-GS08 capacitance decreases with increasing reverse bias: it measures 30–36 pF at 0 V, dropping to 12.5 pF at 6 V, and further declining near VRWM (12 V). This voltage-dependent behavior is typical of junction capacitance in PN diodes and is documented in Figure 3 of the datasheet - critical for high-frequency designers who must model dynamic impedance across operating voltage ranges.
VESD12A1C-02Z-GS08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- SOD-923
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 23V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 92W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 30pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-923
VESD12A1C-02Z-GS08 FAQ
1.How can I place an order for VESD12A1C-02Z-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VESD12A1C-02Z-GS08 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VESD12A1C-02Z-GS08 reliable?
The price and inventory of VESD12A1C-02Z-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VESD12A1C-02Z-GS08 is usually 5 days.
3.What payment methods are accepted for VESD12A1C-02Z-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VESD12A1C-02Z-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VESD12A1C-02Z-GS08?
VESD12A1C-02Z-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VESD12A1C-02Z-GS08 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VESD12A1C-02Z-GS08?
For technical support, including VESD12A1C-02Z-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VESD12A1C-02Z-GS08 requirements.
6.How does Aetrix verify that VESD12A1C-02Z-GS08 is sourced from the original manufacturer or authorized distributors?
All VESD12A1C-02Z-GS08 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VESD12A1C-02Z-GS08 meets industry standards.
7.What is the process for return or replacement of VESD12A1C-02Z-GS08?
All VESD12A1C-02Z-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with VESD12A1C-02Z-GS08, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VESD12A1C-02Z-GS08 part is unused and in its original packaging.
Return procedure for VESD12A1C-02Z-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VESD12A1C-02Z-GS08 Tags
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