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Vishay General Semiconductor - Diodes Division TPSMA9.1AHE3/5AT
- Part No.:
- TPSMA9.1AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA9.1AHE3/5AT.pdf
- Description:
- TVS DIODE 7.78VWM 13VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,356
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Product details
Overview
TPSMA9.1AHE3/5AT 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 9.1 V breakdown voltage (VBR), 7.78 V stand-off voltage (VWM), 29.9 V maximum clamping voltage (VC) at 50 A peak pulse current, 400 W peak pulse power (10/1000 µs), and 185 °C maximum junction temperature - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the TPSMA9.1AHE3/5AT datasheet, TPSMA9.1AHE3/5AT pinout, TPSMA9.1AHE3/5AT application, or TPSMA9.1AHE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1.0 µA reverse leakage at VWM, thermal derating above 25 °C, and compatibility with J-STD-020 MSL Level 1 reflow profiles.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by overvoltage events such as inductive switching surges or ESD. Its passivated anisotropic rectifier structure enables fast response time (<1 ns) and low incremental surge resistance, ensuring robust clamping performance under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for 40 A non-repetitive forward surge current (IFSM) and exhibits a positive temperature coefficient of breakdown voltage (+0.060 %/°C), enabling predictable VBR drift across its -65 °C to +185 °C operating range - critical for high-reliability automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 8.65 / 9.10 / 9.55 V at 1.0 mA test current - defines precise clamping initiation threshold under DC stress |
| VWM | 7.78 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 29.9 V at 50 A peak pulse current - actual clamped voltage during worst-case 400 W transient |
| PPPM | 400 W (10/1000 µs waveform) - peak surge energy handling capacity per pulse |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-temperature industrial PCBs |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes polarity |
| Package | SMA (DO-214AC) - surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Junction passivation | Reduces surface leakage and improves long-term stability under high humidity and bias stress |
| MSL Level 1 | Compatible with standard SMT reflow up to 260 °C peak without moisture-induced damage |
| Low clamping ratio (VC/VBR) | 3.29 - ensures minimal overvoltage exposure to downstream ICs during surge events |
| High IFSM | 40 A (8.3 ms half-sine) - withstands repeated motor drive or relay coil turn-off surges |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping transient suppressor placed between signal line and chassis ground. Use Value: Limits induced transients to ≤29.9 V, preventing damage to 5 V or 3.3 V interface ICs while maintaining signal integrity. |
Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring surge coupling. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on 24 V DC input channels exposed to relay contact bounce or inductive kickback. Use Value: Absorbs 400 W surges without degradation, supporting >100,000 surge cycles per IEC 61000-4-5 compliance testing. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side surge protection in AC/DC adapters for USB-C PD and smart home hubs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5–12 V DC output rails to suppress cross-coupled transients from primary-side switching noise. Use Value: 7.78 V VWM allows stable operation across full load range while clamping spikes within safe margin of downstream regulators. |
Use Scenario: Overvoltage protection on Ethernet PHY power pins and auxiliary control lines in base station backhaul equipment. IC Role / Device Role / Timing Role: Unidirectional clamp on 3.3 V or 5 V supply rails feeding sensitive RF front-end ICs. Use Value: 185 °C TJ max. supports operation in sealed telecom enclosures with ambient temperatures up to 105 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | 9.0 V VBR (min), 7.37 V VWM, 14.4 V VC @ 27.8 A - lower clamping voltage but 300 W PPPM | Lower power handling limits use in <300 W surge environments; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and higher clamping margin is acceptable |
| TPSMA9.0AHE3/5AT | 9.0 V VBR (min), 7.65 V VWM, 30.0 V VC @ 49.7 A - nearly identical specs, minor VBR/VC shift due to binning | Same AEC-Q101 qualification, RoHS, and packaging - direct functional substitute with no layout change | Preferred for design-in continuity where 9.0 V nominal breakdown is specified in legacy schematics |
Compared with SMAJ9.0A and TPSMA9.0AHE3/5AT, the TPSMA9.1AHE3/5AT offers tighter VBR tolerance (±5%), higher PPPM, and guaranteed AEC-Q101 qualification - making it optimal for new automotive and industrial designs requiring validated reliability and precise clamping thresholds.
Availability
TPSMA9.1AHE3/5AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply, AEC-Q101 traceability, and consistent DO-214AC packaging.
Supply support for TPSMA9.1AHE3/5AT 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, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-grade performance.
The TPSMA series is part of Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for robust, high-temperature-stable clamping in harsh-environment electronics including engine control units and factory automation systems.
FAQ
What is the breakdown voltage tolerance for TPSMA9.1AHE3/5AT?
The TPSMA9.1AHE3/5AT has a breakdown voltage (VBR) range of 8.65 V to 9.55 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 9.1 V value. This tight tolerance ensures predictable clamping behavior across production lots and supports precise circuit margining in safety-critical applications like automotive sensor interfaces.
Is TPSMA9.1AHE3/5AT qualified to AEC-Q101?
Yes, TPSMA9.1AHE3/5AT is AEC-Q101 qualified - confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101-qualified variants. This qualification covers stress tests including HTGB, H3TRB, and temperature cycling, validating suitability for automotive under-hood and body-control module applications.
What is the maximum clamping voltage of TPSMA9.1AHE3/5AT at rated surge current?
The TPSMA9.1AHE3/5AT clamps to a maximum of 29.9 V at 50 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can TPSMA9.1AHE3/5AT be used in bidirectional configurations?
No, TPSMA9.1AHE3/5AT is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts only during positive transients relative to its cathode terminal. For bidirectional protection, a separate device such as the TPSMA9.0CAHE3/5AT (center-tapped or complementary pair) must be selected.
What is the thermal derating behavior of TPSMA9.1AHE3/5AT above 25 °C?
TPSMA9.1AHE3/5AT follows linear derating per Figure 2 in the datasheet: peak pulse power (PPPM) decreases from 400 W at 25 °C to zero at 185 °C. At 125 °C ambient, PPPM is reduced to approximately 240 W - a critical consideration for high-temperature PCB layouts in engine control or industrial motor drives.
TPSMA9.1AHE3/5AT 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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
TPSMA9.1AHE3/5AT FAQ
1.How can I place an order for TPSMA9.1AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA9.1AHE3/5AT 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 TPSMA9.1AHE3/5AT reliable?
The price and inventory of TPSMA9.1AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA9.1AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA9.1AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA9.1AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA9.1AHE3/5AT?
TPSMA9.1AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA9.1AHE3/5AT 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 TPSMA9.1AHE3/5AT?
For technical support, including TPSMA9.1AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA9.1AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA9.1AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA9.1AHE3/5AT 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 TPSMA9.1AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA9.1AHE3/5AT?
All TPSMA9.1AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA9.1AHE3/5AT, 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 TPSMA9.1AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA9.1AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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