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Vishay General Semiconductor - Diodes Division TPSMA12AHE3/5AT
- Part No.:
- TPSMA12AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12AHE3/5AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,302
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Product details
Overview
TPSMA12AHE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 12.0 V nominal breakdown voltage (VBR), 24.0 V maximum clamping voltage (VC) at 5.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), 1.0 W steady-state power dissipation, and operates up to +185 °C junction temperature - used in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA12AHE3/5AT datasheet, TPSMA12AHE3/5AT pinout, TPSMA12AHE3/5AT application, or TPSMA12AHE3/5AT equivalent, key selection criteria include unidirectional polarity, 10.2 V stand-off voltage (VWM), <1.0 µA reverse leakage at VWM, AEC-Q101 qualification, and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional architecture provides fast response time (<1.0 ns) and excellent clamping performance during transient events such as inductive load switching or lightning-induced surges.
The device is rated for repetitive 10/1000 µs waveform pulses at 0.01% duty cycle and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is AEC-Q101 qualified (HE3 suffix), RoHS-compliant, and features matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.40 / 12.0 / 12.60 V - ensures reliable conduction onset above 10.2 V system operating voltage |
| VWM | 10.20 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 24.0 V at 5.0 A - limits downstream IC voltage stress during 400 W transient events |
| PPPM | 400 W (10/1000 µs) - handles automotive load-dump and ISO 7637-2 pulse 1/2/5a energy levels |
| TJ max. | +185 °C - supports under-hood automotive and industrial environments without derating |
| Polarity | Unidirectional - protects DC rails only; cathode band denotes terminal orientation |
| Package | SMA (DO-214AC) - industry-standard SMT footprint compatible with automated assembly |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode indicated by color band; terminals are matte tin-plated for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; defines clamping reference for positive transients |
| Cathode | Protected line input | Connected to power/signal line being protected; conducts when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive-grade operation including temperature cycling, HTRB, and ESD |
| MSL Level 1 | Zero moisture sensitivity - supports standard 260 °C lead-free reflow without baking |
| Low clamping ratio | VC/VBR = 2.0 - minimizes overvoltage exposure to protected circuitry |
| High IFSM | 40 A (8.3 ms half-sine) - withstands repeated motor-start or relay-coil turn-off surges |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor supply line and ground, responding within nanoseconds to transients exceeding 10.2 V. Use Value: Prevents latch-up or permanent damage to 12 V-rated analog front-ends while maintaining signal integrity below VWM. | Use Scenario: Safeguarding 12 V/24 V DC power inputs of PLC I/O modules against inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, absorbing 400 W pulses without degradation across 1000+ cycles. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without external crowbar circuits. |
| Consumer Device USB Port Protection | Telecom Line Interface Surge Suppression |
Use Scenario: Shielding USB VBUS and D+/D− lines in portable medical monitors and smart home hubs from human-body-model ESD and cable discharge events. IC Role / Device Role / Timing Role: Secondary-level TVS placed after common-mode choke, clamping differential and common-mode transients simultaneously. Use Value: Limits VC to 24.0 V to prevent damage to USB PHY ICs rated for 3.3 V–5.5 V operation. | Use Scenario: Protecting Ethernet PHY interfaces and RS-485 transceivers in base station equipment exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage unidirectional suppressor on DC bias lines feeding PoE injectors and line drivers. Use Value: Withstands 6.7 A peak surge (per TPSMA43A family limit) while maintaining <1 µA leakage at 30.8 V standby voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMA package, 12 V VBR, but lower PPPM = 400 W (same rating), no AEC-Q101 qualification | Not validated for automotive use; suitable for commercial/industrial only | Select if AEC-Q101 is not required and cost is prioritized |
| TPSMA12AHM3/5AT | Identical electrical specs; halogen-free molding compound and whisker-tested leads (JESD 201 Class 2) | Required for RoHS + halogen-free compliance in EU/Asia export programs | Select when halogen-free material compliance is mandated |
Compared with SMAJ12A and TPSMA12AHM3/5AT, the TPSMA12AHE3/5AT offers AEC-Q101 qualification and standard RoHS compliance out-of-the-box, making it optimal for automotive Tier-1 designs where qualification traceability and reflow robustness are mandatory - while TPSMA12AHM3/5AT adds halogen-free assurance for stricter environmental programs.
Availability
TPSMA12AHE3/5AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power supplies, and telecom line interface designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPSMA12AHE3/5AT 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The TPSMAxxA series belongs to Vishay's PAR® (Protection and Regulation) transient suppressor product line, engineered specifically for high-temperature, high-reliability DC rail and signal-line protection in automotive and industrial systems.
FAQ
What is the maximum clamping voltage of the TPSMA12AHE3/5AT at its rated peak pulse current?
The TPSMA12AHE3/5AT has a maximum clamping voltage (VC) of 24.0 V when subjected to its rated peak pulse current of 5.0 A (10/1000 µs waveform). This value is measured per JEDEC standards and ensures downstream components experience limited overvoltage during transient events. The clamping performance is guaranteed across the full operating temperature range up to +185 °C junction temperature.
Is the TPSMA12AHE3/5AT qualified for automotive applications?
Yes, the TPSMA12AHE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's documentation for HE3-suffix parts. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD verification. This qualification makes the TPSMA12AHE3/5AT suitable for under-hood and cabin applications such as engine control sensors, body electronics, and ADAS power domains.
What does the "HE3" suffix indicate in TPSMA12AHE3/5AT?
The "HE3" suffix in TPSMA12AHE3/5AT denotes a RoHS-compliant, AEC-Q101-qualified variant with matte tin-plated leads that meet JESD 22-B102 solderability and JESD 201 Class 2 whisker resistance requirements. The "5AT" denotes tape-and-reel packaging in 7-inch reels with 1800 units per reel - a standard logistics configuration for SMT production lines.
How does the TPSMA12AHE3/5AT compare to bidirectional TVS diodes in surge protection?
The TPSMA12AHE3/5AT is unidirectional and optimized for DC power line protection where only positive transients occur relative to ground. Unlike bidirectional devices, it provides lower leakage (<1.0 µA at 10.2 V) and tighter VBR tolerance, but cannot suppress negative-going surges. It is therefore selected for 12 V automotive rails and industrial DC supplies - not AC or data-line applications requiring symmetrical clamping.
What PCB layout guidance applies to the TPSMA12AHE3/5AT for optimal surge handling?
Vishay specifies mounting the TPSMA12AHE3/5AT on PCBs with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W pulse power. Trace inductance must be minimized - short, wide traces directly connecting cathode to protected line and anode to low-inductance ground plane. Thermal relief should be avoided on pads to maintain surge current path integrity and junction temperature control.
TPSMA12AHE3/5AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 24A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA12AHE3/5AT FAQ
1.How can I place an order for TPSMA12AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12AHE3/5AT 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 TPSMA12AHE3/5AT reliable?
The price and inventory of TPSMA12AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA12AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA12AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12AHE3/5AT?
TPSMA12AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12AHE3/5AT 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 TPSMA12AHE3/5AT?
For technical support, including TPSMA12AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA12AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA12AHE3/5AT 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 TPSMA12AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA12AHE3/5AT?
All TPSMA12AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12AHE3/5AT, 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 TPSMA12AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA12AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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