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Vishay General Semiconductor - Diodes Division TPSMA20AHE3/5AT
- Part No.:
- TPSMA20AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA20AHE3/5AT.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
TPSMA20AHE3/5AT 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 20 V nominal breakdown voltage (VBR), 17.1 V stand-off voltage (VWM), 27.7 V maximum clamping voltage at 14.4 A peak pulse current, 400 W peak pulse power (10/1000 µs), and 185 °C maximum junction temperature - enabling robust protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the TPSMA20AHE3/5AT datasheet, TPSMA20AHE3/5AT pinout, TPSMA20AHE3/5AT application, or TPSMA20AHE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1.0 W steady-state power dissipation, low incremental surge resistance, and compatibility with reflow soldering per J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, activating when reverse voltage exceeds its 20 V breakdown threshold. Its passivated anisotropic rectifier technology ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for safeguarding MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
The device is rated for repetitive 10/1000 µs surge pulses at 0.01% duty cycle and derates linearly above 25 °C ambient, maintaining reliable operation up to 185 °C junction temperature. Its SMA package supports high thermal dissipation via 5.0 mm × 5.0 mm copper pads and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 V / 20.0 V / 21.0 V - defines precise clamping onset; ensures consistent overvoltage protection across production lots |
| VWM | 17.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 27.7 V at 14.4 A - clamping voltage during 400 W transient; limits stress on downstream ICs |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity for lightning and load-switching events |
| TJ max. | +185 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation in PCB layout |
| MSL Level | Level 1 (260 °C peak) - supports standard lead-free reflow without moisture sensitivity concerns |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads. Cathode identified by color band. Compliant with JEDEC DO-214AC outline and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side of protected line; forms return path during clamping |
| Cathode | Current exit point during reverse-biased clamping | Connected to higher-potential side (e.g., VCC rail); conducts surge current to ground when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design reduces leakage drift and improves long-term reliability at elevated temperatures |
| AEC-Q101 qualification | Validated for automotive-grade applications including engine control units and body electronics |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, enhancing protection margin for sensitive logic |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when properly mounted |
| 185 °C junction rating | Supports operation in high-ambient environments without thermal derating penalties up to 155 °C ambient |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp spikes >27.7 V. Use Value: Prevents latch-up or permanent damage to MCU power inputs during ISO 16750-2 pulse 5a/b events. | Use Scenario: Shielding analog output lines of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS connected across signal and ground to absorb ESD and cable discharge events. Use Value: Maintains signal integrity below 17.1 V stand-off while limiting clamping to 27.7 V during 8 kV contact ESD (IEC 61000-4-2). |
| Consumer USB Port Surge Suppression | Telecom DC Power Input Protection |
Use Scenario: Safeguarding USB VBUS lines in portable docking stations exposed to hot-plug transients. IC Role / Device Role / Timing Role: Unidirectional TVS on +5 V supply rail upstream of USB controller. Use Value: Clamps 10/1000 µs surges to ≤27.7 V before they reach USB PHY, preserving data link stability. | Use Scenario: Protecting -48 V telecom power feeds from lightning-induced surges on outdoor cabinet inputs. IC Role / Device Role / Timing Role: TVS configured in series with fuse on negative rail to shunt positive transients to chassis ground. Use Value: Withstands 400 W surges while maintaining <1 µA leakage at -41.0 V (derated VWM), ensuring low standby loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same SMA package, 20 V VBR, but 400 W PPPM with higher VC = 32.4 V at 12.3 A; not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select when AEC-Q101 is not required and higher clamping voltage is acceptable |
| 1.5SMC20A | Higher-power SMC package (1500 W), same 20 V VBR, VC = 32.4 V at 46.7 A; larger footprint and thermal mass | Designed for higher-energy surges; requires PCB area increase and different pad layout | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits SMC |
Compared with SMAJ20A and 1.5SMC20A, the TPSMA20AHE3/5AT delivers tighter clamping (27.7 V vs. ≥32.4 V), automotive qualification, and optimized thermal performance in the compact SMA footprint - making it preferred for space-constrained, high-reliability designs where low VC and AEC-Q101 compliance are mandatory.
Availability
TPSMA20AHE3/5AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer USB power delivery systems requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for TPSMA20AHE3/5AT 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-grade validation.
The TPSMAxxA family is engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments - delivering AEC-Q101 qualification, 185 °C junction capability, and stable clamping across extended temperature ranges.
FAQ
What is the breakdown voltage tolerance for TPSMA20AHE3/5AT?
The TPSMA20AHE3/5AT has a specified breakdown voltage range of 19.0 V (minimum) to 21.0 V (maximum) at 1.0 mA test current, with 20.0 V as the nominal value. This ±5% tolerance ensures predictable clamping behavior across manufacturing lots and temperature extremes, supporting robust design margins in automotive and industrial applications.
Is TPSMA20AHE3/5AT AEC-Q101 qualified?
Yes, TPSMA20AHE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for automotive powertrain and body electronics.
What is the maximum clamping voltage of TPSMA20AHE3/5AT and under what conditions?
The TPSMA20AHE3/5AT has a maximum clamping voltage (VC) of 27.7 V, measured at 14.4 A peak pulse current using a 10/1000 µs waveform. This value is guaranteed under standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads), and represents the upper voltage limit imposed on protected circuitry during surge events.
Can TPSMA20AHE3/5AT be used in bidirectional configurations?
No, TPSMA20AHE3/5AT is unidirectional only, as explicitly stated in the Vishay datasheet. It protects against positive transients on the cathode side relative to anode. For bidirectional protection, two devices must be connected in series opposition or a dedicated bidirectional TVS (e.g., TPSMA20CA) must be selected.
What is the steady-state power dissipation rating for TPSMA20AHE3/5AT?
The TPSMA20AHE3/5AT has a steady-state power dissipation (PD) rating of 1.0 W at TA = 25 °C, derating linearly above that temperature. This rating governs continuous reverse-bias leakage power and must be considered alongside thermal pad design to maintain junction temperature below 185 °C in final application layouts.
TPSMA20AHE3/5AT 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- 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)
TPSMA20AHE3/5AT FAQ
1.How can I place an order for TPSMA20AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA20AHE3/5AT 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 TPSMA20AHE3/5AT reliable?
The price and inventory of TPSMA20AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA20AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA20AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA20AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA20AHE3/5AT?
TPSMA20AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA20AHE3/5AT 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 TPSMA20AHE3/5AT?
For technical support, including TPSMA20AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA20AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA20AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA20AHE3/5AT 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 TPSMA20AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA20AHE3/5AT?
All TPSMA20AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA20AHE3/5AT, 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 TPSMA20AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA20AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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