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Vishay General Semiconductor - Diodes Division TPSMA9.1AHE3_A/I
- Part No.:
- TPSMA9.1AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA9.1AHE3_A/I.pdf
- Description:
- TVS DIODE 7.78VWM 13VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,615
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Product details
Overview
TPSMA9.1AHE3_A/I 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 operates up to +185 °C junction temperature - used in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the TPSMA9.1AHE3_A/I datasheet, TPSMA9.1AHE3_A/I pinout, TPSMA9.1AHE3_A/I application, or TPSMA9.1AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HE3 suffix), MSL Level 1 rating, 1.0 µA reverse leakage at VWM, 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 junction design enables reliable operation under repetitive 10/1000 µs transients at 0.01% duty cycle and supports fast response time critical for protecting MOSFETs and ICs against inductive switching spikes.
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a positive temperature coefficient of VBR (+0.060 %/°C), enabling predictable voltage clamping behavior across its -65 °C to +185 °C operating range without thermal runaway risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 8.65 / 9.10 / 9.55 V - precise breakdown threshold ensures consistent clamping onset before downstream component damage |
| VWM | 7.78 V - maximum continuous reverse voltage without significant leakage, compatible with 5 V–9 V rail systems |
| VC @ IPPM | 29.9 V at 50 A - limits transient voltage seen by protected circuitry during 400 W surge events |
| PPPM | 400 W (10/1000 µs) - handles typical lightning and load-switching surges per IEC 61000-4-5 |
| IR @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max. | +185 °C - supports under-hood automotive and industrial environments without derating |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by color band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events |
| Cathode | Transient voltage sensing node | Connected to protected line (e.g., power rail or signal); initiates avalanche conduction when VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure improves long-term reliability under thermal cycling and humidity stress |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 | Reflow-compatible up to 260 °C peak without preconditioning - eliminates moisture sensitivity handling overhead |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), enhancing protection margin |
| High TJ capability | Enables placement near heat sources (e.g., power MOSFETs) without derating or thermal shutdown |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output line and chassis ground. Use Value: Clamps transients to ≤29.9 V while maintaining <1.0 µA leakage at 7.78 V, preserving signal fidelity and meeting AEC-Q100 stress requirements. | Use Scenario: Safeguarding AC-DC converter primary-side rectifiers and DC-DC controller inputs against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor mounted across bulk capacitor input terminals. Use Value: Absorbs 400 W (10/1000 µs) without failure, enabling compact design with no external heatsink required due to 185 °C TJ rating. |
| Consumer USB Port ESD Protection | Telecom Line Interface |
Use Scenario: Secondary-level surge suppression on USB 2.0 VBUS lines in portable docking stations exposed to accidental hot-plug transients. IC Role / Device Role / Timing Role: High-power clamping diode placed after primary polymer PTC, upstream of USB switch IC. Use Value: Limits VBUS overvoltage to 29.9 V during 50 A surges, preventing latch-up in USB controllers while supporting 1000+ surge cycles. | Use Scenario: Protecting Ethernet PHY interface transformers and PoE injectors from induced surges on twisted-pair data lines in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS array element across differential pair (e.g., TX+/TX−) referenced to common-mode ground. Use Value: Maintains <1.0 µA leakage at 7.78 V to avoid signal attenuation, while clamping common-mode surges within IEEE 802.3af PoE compliance limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | 9.0 V VBR (min 8.55 V), same SMA package, 400 W PPPM, but not AEC-Q101 qualified | Not certified for automotive use; suitable for industrial/commercial only | Select when AEC-Q101 is not required and tighter VBR tolerance is acceptable |
| TPSMA9.0AHE3_A/I | Identical construction and qualification; differs only in VBR (9.0 V vs. 9.1 V) and marking code (ALP vs. AMP) | No functional difference in protection performance; minor VBR shift affects clamping threshold by ~0.1 V | Use interchangeably where ±0.1 V VBR variation is acceptable in system margin analysis |
Compared with SMAJ9.0A and TPSMA9.0AHE3_A/I, the TPSMA9.1AHE3_A/I provides AEC-Q101 validation and a slightly higher nominal breakdown voltage, making it preferred for automotive designs requiring traceable qualification and tighter thermal stability (0.060 %/°C αT).
Availability
TPSMA9.1AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power supply input stages, and telecom line interface applications requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for TPSMA9.1AHE3_A/I 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, high-temperature operation, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Avalanche Rectifier) transient voltage suppressor product line, engineered specifically for robust, high-energy surge protection in harsh environments including under-hood automotive, industrial controls, and infrastructure equipment.
FAQ
What is the breakdown voltage tolerance of TPSMA9.1AHE3_A/I?
The TPSMA9.1AHE3_A/I has a specified breakdown voltage (VBR) range of 8.65 V (min) to 9.55 V (max) at 1.0 mA test current, with a nominal value of 9.10 V. This ±5% tolerance is confirmed in the Electrical Characteristics table of Vishay document 88405 and applies across the full operating temperature range. The TPSMA9.1AHE3_A/I maintains this specification under standard JEDEC test conditions and is validated per AEC-Q101 stress requirements.
Is TPSMA9.1AHE3_A/I suitable for bidirectional transient suppression?
No, the TPSMA9.1AHE3_A/I is unidirectional only, as explicitly stated in the Features section of the Vishay datasheet. It protects against positive-going transients on the cathode side relative to anode. For bidirectional protection, two TPSMA9.1AHE3_A/I devices must be connected in series opposition, or a dedicated bidirectional TVS such as SMBJ9.0CA should be selected. The TPSMA9.1AHE3_A/I polarity is marked by a cathode band and cannot be used in reverse-biased clamping configurations.
Does TPSMA9.1AHE3_A/I require derating at elevated ambient temperatures?
Yes, the TPSMA9.1AHE3_A/I must be derated above TA = 25 °C per Figure 2 in Vishay document 88405. Its peak pulse power (PPPM) decreases linearly to zero at +185 °C junction temperature. At 125 °C ambient (assuming typical thermal resistance), the usable PPPM drops to approximately 240 W. The TPSMA9.1AHE3_A/I datasheet provides exact derating curves; design margins must account for PCB copper area, airflow, and adjacent heat sources to maintain safe TJ.
What does the "HE3" suffix indicate in TPSMA9.1AHE3_A/I?
The "HE3" suffix in TPSMA9.1AHE3_A/I denotes RoHS-compliant construction and AEC-Q101 qualification per Vishay's ordering nomenclature. It also indicates compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow capability (peak 260 °C). The "A/I" denotes packaging in 13" diameter tape-and-reel (7500 pcs), distinguishing it from "A/H" (7" reel, 1800 pcs). The TPSMA9.1AHE3_A/I meets automotive-grade reliability standards without requiring additional qualification testing.
How does the clamping voltage of TPSMA9.1AHE3_A/I compare to its breakdown voltage?
The TPSMA9.1AHE3_A/I clamps at 29.9 V (VC) when subjected to its rated 50 A peak pulse current (IPPM), which is approximately 3.3× its nominal breakdown voltage (9.10 V). This ratio reflects the device's low incremental surge resistance and is critical for ensuring protected circuitry remains below absolute maximum ratings during surge events. The TPSMA9.1AHE3_A/I achieves this clamping performance while maintaining only 1.0 µA leakage at 7.78 V stand-off voltage, balancing protection strength and standby efficiency.
TPSMA9.1AHE3_A/I 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_A/I FAQ
1.How can I place an order for TPSMA9.1AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA9.1AHE3_A/I 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_A/I reliable?
The price and inventory of TPSMA9.1AHE3_A/I 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_A/I is usually 5 days.
3.What payment methods are accepted for TPSMA9.1AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA9.1AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA9.1AHE3_A/I?
TPSMA9.1AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA9.1AHE3_A/I 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_A/I?
For technical support, including TPSMA9.1AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA9.1AHE3_A/I requirements.
6.How does Aetrix verify that TPSMA9.1AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMA9.1AHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of TPSMA9.1AHE3_A/I?
All TPSMA9.1AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA9.1AHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for TPSMA9.1AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA9.1AHE3_A/I Tags
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