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Vishay General Semiconductor - Diodes Division TPSMA15AHE3/5AT
- Part No.:
- TPSMA15AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA15AHE3/5AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,798
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Product details
Overview
TPSMA15AHE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients. It features a 15.0 V nominal breakdown voltage (VBR), 12.8 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 µs), 18.9 A peak pulse current (IPPM), and 21.2 V maximum clamping voltage (VC) at IPPM, operating up to +185 °C junction temperature.
For engineers reviewing the TPSMA15AHE3/5AT datasheet, TPSMA15AHE3/5AT pinout, TPSMA15AHE3/5AT application, or TPSMA15AHE3/5AT equivalent, this device is selected for high-reliability automotive and industrial overvoltage protection where AEC-Q101 qualification, MSL Level 1 moisture resistance, and stable clamping under thermal stress are critical design requirements.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation for stable performance across -65 °C to +185 °C. Its unidirectional polarity enables forward-biased surge conduction only during reverse overvoltage events, delivering fast response time and low incremental surge resistance.
The device is rated for 400 W peak pulse power per 10/1000 µs waveform at 0.01 % duty cycle and supports repetitive surge handling when mounted on 5.0 mm × 5.0 mm copper pads. It meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 14.3 V / 15.0 V / 15.8 V - ensures reliable triggering above system operating voltage while maintaining margin against false clamping |
| VWM | 12.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA, compatible with 12 V rail systems |
| VC @ IPPM | 21.2 V - clamped voltage during 18.9 A transient, limiting downstream IC stress to safe levels |
| PPPM | 400 W - peak surge energy absorption capability for 10/1000 µs waveform, sufficient for ISO 7637-2 Pulse 1/2a/5a |
| TJ max. | +185 °C - enables operation in under-hood automotive environments and high-power industrial enclosures |
| Polarity | Unidirectional - provides reverse-biased clamping only; requires correct orientation relative to protected line polarity |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 0.208" length, 0.177" width, and cathode band marking |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and cathode indicated by color band. Dimensions: 5.28 mm × 4.50 mm × 2.29 mm (L × W × H), recommended pad layout per datasheet Figure 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal during clamping | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Reverse-biased clamping node | Connected to higher-potential side (e.g., 12 V supply or signal line); marked by color band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
| Junction temperature capability | Rated for continuous operation up to +185 °C, enabling placement near heat sources without derating |
| Clamping performance stability | 0.076 %/°C temperature coefficient of VBR ensures predictable clamping voltage shift across operating range |
| Moisture sensitivity | MSL Level 1 per J-STD-020 - no dry-pack or bake required prior to reflow assembly |
| Surge robustness | 40 A IFSM (8.3 ms half-sine) supports repeated load-dump events without degradation |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails in engine control units (ECUs) and body control modules (BCMs) against ISO 7637-2 load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits clamped voltage to 21.2 V during 18.9 A transients, preventing damage to 3.3 V/5 V logic supplies downstream while maintaining AEC-Q101 compliance. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs exposed to motor drive noise and relay contact bounce. IC Role / Device Role / Timing Role: TVS placed at sensor connector interface to shunt ESD and fast transients before entering signal conditioning circuitry. Use Value: Sub-1 ns response time and 21.2 V clamping protect precision op-amps and ADC inputs from latch-up or parametric shift during 4 kV contact ESD events. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Securing 48 V DC input ports in PoE-powered network switches and base stations against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on main DC input, coordinated with upstream fuses and secondary filtering. Use Value: 400 W peak power rating handles 10/1000 µs surges per IEC 61000-4-5 Level 4, with 21.2 V clamping ensuring downstream DC/DC converter survival. | Use Scenario: Adding transient immunity to 5 V USB-C or barrel jack inputs in smart home hubs and portable audio devices. IC Role / Device Role / Timing Role: Standalone TVS on input power path, positioned before input capacitor and buck converter. Use Value: 12.8 V VWM allows clean 5 V operation with margin; 21.2 V VC prevents overvoltage on 6 V-rated input capacitors during ESD or hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same SMA package, 15 V VBR, but 400 W PPPM at 10/1000 µs and 21.2 V VC; not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select SMAJ15A for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
| 1.5SMC15A | Higher-power SMC package (5.3 mm × 5.3 mm), same 15 V VBR, 400 W rating, 21.2 V VC; AEC-Q101 available in HE3 variant | Requires larger PCB footprint; better thermal dissipation for sustained surge duty | Choose 1.5SMC15A when board space permits and higher thermal mass is needed for repetitive surge environments |
Compared with SMAJ15A and 1.5SMC15A, TPSMA15AHE3/5AT delivers identical electrical clamping performance in a compact SMA footprint while guaranteeing AEC-Q101 qualification-making it the preferred choice for space-constrained automotive modules requiring zero-compromise reliability validation.
Availability
TPSMA15AHE3/5AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, AEC-Q101 traceability, and consistent clamping performance across temperature extremes.
Supply support for TPSMA15AHE3/5AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The TPSMA15AHE3/5AT belongs to Vishay's PAR® series of transient voltage suppressors, engineered specifically for high-temperature, high-reliability overvoltage protection in automotive and industrial systems where long-term stability under thermal stress is mandatory.
FAQ
What is the maximum clamping voltage of the TPSMA15AHE3/5AT at its rated peak pulse current?
The TPSMA15AHE3/5AT has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated 18.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuits during transient events. The TPSMA15AHE3/5AT maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient of 0.076 %/°C.
Is the TPSMA15AHE3/5AT qualified for automotive applications?
Yes, the TPSMA15AHE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. It undergoes rigorous testing for temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 requirements. The TPSMA15AHE3/5AT is intended for use in automotive powertrain, body electronics, and ADAS modules where component-level reliability validation is mandatory.
What is the stand-off voltage (VWM) of the TPSMA15AHE3/5AT and why does it matter?
The TPSMA15AHE3/5AT has a stand-off voltage (VWM) of 12.8 V, meaning it remains in high-impedance state with leakage < 1 μA up to this reverse voltage. This parameter ensures compatibility with 12 V nominal systems-such as automotive battery rails-by providing sufficient margin below the 15.0 V nominal breakdown voltage (VBR) to prevent false triggering during normal operation. The TPSMA15AHE3/5AT uses this 12.8 V VWM to reliably distinguish between steady-state conditions and actual overvoltage faults.
Does the TPSMA15AHE3/5AT require special PCB layout considerations?
Yes-the TPSMA15AHE3/5AT must be mounted using the minimum recommended pad layout specified in Vishay document 88405: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 400 W peak pulse power. Smaller pads cause excessive thermal impedance, leading to premature failure during surge events. The TPSMA15AHE3/5AT also requires short, low-inductance traces to the protected node and proper grounding to ensure sub-nanosecond response and effective clamping.
What is the junction temperature rating of the TPSMA15AHE3/5AT and how does it impact system design?
The TPSMA15AHE3/5AT is rated for a maximum junction temperature (TJ) of +185 °C, significantly exceeding standard industrial limits. This enables direct placement near heat-generating components (e.g., power MOSFETs or DC/DC converters) without thermal derating, simplifying thermal management in dense automotive and industrial layouts. The TPSMA15AHE3/5AT leverages this rating to maintain stable VBR and clamping performance across extreme ambient conditions, supporting under-hood and enclosed control cabinet deployments.
TPSMA15AHE3/5AT 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 18.9A
- 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)
TPSMA15AHE3/5AT FAQ
1.How can I place an order for TPSMA15AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA15AHE3/5AT 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 TPSMA15AHE3/5AT reliable?
The price and inventory of TPSMA15AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA15AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA15AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA15AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA15AHE3/5AT?
TPSMA15AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA15AHE3/5AT 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 TPSMA15AHE3/5AT?
For technical support, including TPSMA15AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA15AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA15AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA15AHE3/5AT 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 TPSMA15AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA15AHE3/5AT?
All TPSMA15AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA15AHE3/5AT, 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 TPSMA15AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA15AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA15AHE3/5AT Tags
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