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Diodes Incorporated T12S5A-7
- Part No.:
- T12S5A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
T12S5A-7.pdf
- Description:
- Surge Protection PP SOD523 T&R 3
- Quantity:
- Payment:
- Shipping:
Inventory:9,851
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Product details
Overview
T12S5A-7 from Diodes Incorporated is a unidirectional surface-mount TVS diode designed for ESD and transient overvoltage protection in low-capacitance signal lines. It features a 12 V standoff voltage, 14.1 V minimum breakdown voltage at 1 mA, clamps to 17.2 V at 5 A (8/20 µs), delivers 300 W peak pulse power, and exhibits only 85 pF typical capacitance at 0 V - ideal for USB 2.0, HDMI, and high-speed data interfaces.
For engineers reviewing the T12S5A-7 datasheet, T12S5A-7 pinout, T12S5A-7 application, or T12S5A-7 equivalent, key selection criteria include reverse standoff voltage accuracy, clamping performance under 5 A transients, low junction-to-ambient thermal resistance (417 °C/W), and compatibility with SOD523 footprint constraints in space-constrained PCB layouts.
Technical Context
This TVS operates as a single-channel, cathode-anode unidirectional clamp with fast response time (<1 ns) and low leakage (<0.01 µA at 12 V). Its silicon avalanche structure ensures repeatable breakdown behavior and stable clamping across temperature (-65 °C to +150 °C).
The device is optimized for IEC 61000-4-2 ±30 kV air/contact ESD protection and meets JEDEC JESD22-A114F requirements. Its SOD523 package enables direct integration into high-density routing paths without compromising signal integrity due to parasitic capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 12 V - maximum continuous DC or RMS voltage before significant conduction begins |
| Breakdown Voltage (min) | 14.1 V @ 1 mA - guaranteed avalanche onset threshold for reliable triggering |
| Clamping Voltage | 17.2 V @ 5 A (8/20 µs) - peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power | 300 W - maximum transient energy absorption capability per IEC 61000-4-2 |
| Total Capacitance | 85 pF @ 0 V, 1 MHz - minimal loading on high-speed digital or RF signal paths |
| ESD Rating | ±30 kV (IEC 61000-4-2 contact/air) - exceeds industrial and consumer immunity requirements |
| Thermal Resistance | 417 °C/W - defines derating curve for sustained power dissipation on FR-4 board |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic case (1.25 mm × 0.85 mm × 0.65 mm), cathode-banded polarity marking, matte tin-plated alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Transient current sink path | Connected to protected line; conducts surge current toward ground when clamped |
| Cathode (Pin 2) | Reference node / ground return | Connected to system ground plane; establishes clamping reference and completes surge path |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Ratio | 1.43× VRWM (17.2 V / 12 V) - minimizes stress on downstream ICs during surge events |
| Ultra-Low Capacitance | 85 pF - preserves signal rise/fall times in 480 Mbps USB 2.0 and 1.65 Gbps HDMI 1.4a links |
| Automotive-Qualified Variant Available | T12S5AQ - AEC-Q101 qualified version for infotainment and ADAS sensor interfaces |
| Green Compliance | Halogen- and antimony-free, RoHS 3 compliant - meets IPC-1752A material declaration requirements |
| Fast Response Time | <1 ns - triggers before sensitive logic inputs are damaged by ESD-induced voltage overshoot |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Channels |
|---|---|
Use Scenario: Protecting USB 2.0 differential pairs against ESD events during hot-plug insertion and cable handling. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between D+ and D− lines and chassis ground. Use Value: 85 pF capacitance avoids signal integrity degradation while maintaining <1 ns response to ±8 kV HBM surges. | Use Scenario: Safeguarding HDMI DDC (I²C) and CEC control lines from electrostatic discharge in home theater receivers. IC Role / Device Role / Timing Role: Single-channel transient suppressor on bidirectional 5 V control bus with pull-up resistors. Use Value: 12 V standoff allows full 5 V logic swing; 17.2 V clamping prevents latch-up in HDMI controller I/O cells. |
| Industrial Sensor Interfaces | Automotive Infotainment Displays |
Use Scenario: Shielding RS-485 or CAN FD transceiver I/O pins from induced lightning surges in factory automation systems. IC Role / Device Role / Timing Role: Point-of-entry protection on twisted-pair communication lines referenced to local ground. Use Value: 300 W peak power rating sustains multiple 10/1000 µs transients per IEC 61000-4-5 Level 3 compliance. | Use Scenario: ESD protection for LVDS video interface traces connecting head unit to TFT display in automotive dashboards. IC Role / Device Role / Timing Role: Low-capacitance TVS on each LVDS pair, mounted adjacent to connector. Use Value: 85 pF ensures <1% rise-time degradation at 1.5 Gbps; SOD523 footprint fits tight trace spacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | DO-214AC package (larger); 12 V standoff, 19.9 V clamping @ 5 A; 100 pF capacitance | Higher board area use; suitable for higher-power industrial transients but less optimal for high-speed data | Select when board space permits and clamping voltage margin >2.7 V is acceptable |
| SP1003-010 | SOD-323 package; 12 V standoff, 19.5 V clamping @ 5 A; 15 pF capacitance | Lower capacitance but reduced surge rating (150 W); optimized for ultra-high-speed interfaces like PCIe Gen3 | Select when sub-20 pF is mandatory and peak surge current ≤3 A suffices |
Compared with SMAJ12A and SP1003-010, T12S5A-7 uniquely balances 85 pF capacitance, 17.2 V clamping, and SOD523 size - making it optimal for cost-sensitive, space-constrained USB/HDMI designs requiring robust ±30 kV ESD immunity.
Availability
T12S5A-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI control channel safeguarding, and industrial sensor I/O conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for T12S5A-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, computing, and consumer markets.
T12S5A-7 belongs to Diodes' S5A series of ultra-small unidirectional TVS diodes, engineered specifically for high-speed data line protection where low capacitance, precise clamping, and miniature packaging are critical design constraints.
FAQ
What is the maximum operating temperature range for T12S5A-7?
T12S5A-7 operates reliably from -65 °C to +150 °C, enabling deployment in extended-temperature environments such as automotive engine bays, industrial motor drives, and outdoor telecom equipment. This range is validated per JEDEC JESD22-A104D thermal cycling and JESD22-A103B high-temperature storage tests.
Is T12S5A-7 compatible with lead-free reflow soldering processes?
Yes, T12S5A-7 supports standard lead-free reflow profiles up to 260 °C peak temperature (per JEDEC J-STD-020), with moisture sensitivity level 1 rating. Its matte tin finish on alloy 42 leadframe ensures consistent wetting and void-free joints on FR-4 and high-Tg PCBs.
How does T12S5A-7 perform under repeated ESD strikes?
T12S5A-7 maintains clamping voltage stability and leakage current below 0.01 µA after ≥1000 consecutive ±8 kV HBM ESD pulses (JEDEC JESD22-A114F), confirming robust wear-out resistance and suitability for high-volume consumer electronics with frequent user interaction.
Can T12S5A-7 be used in bidirectional signal paths?
No - T12S5A-7 is unidirectional and must be oriented with cathode to ground. For bidirectional protection (e.g., USB D+/D−), two devices are required per line or a dedicated bidirectional TVS like D3V3S5A must be selected to avoid forward conduction during normal signal swings.
T12S5A-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-79, SOD-523
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 14.1V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 85pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
T12S5A-7 FAQ
1.How can I place an order for T12S5A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for T12S5A-7 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 T12S5A-7 reliable?
The price and inventory of T12S5A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T12S5A-7 is usually 5 days.
3.What payment methods are accepted for T12S5A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T12S5A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T12S5A-7?
T12S5A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T12S5A-7 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 T12S5A-7?
For technical support, including T12S5A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T12S5A-7 requirements.
6.How does Aetrix verify that T12S5A-7 is sourced from the original manufacturer or authorized distributors?
All T12S5A-7 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 T12S5A-7 meets industry standards.
7.What is the process for return or replacement of T12S5A-7?
All T12S5A-7 units undergo pre-shipment inspection (PSI). If there is an issue with T12S5A-7, 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 T12S5A-7 part is unused and in its original packaging.
Return procedure for T12S5A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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