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Vishay General Semiconductor - Diodes Division TPSMA9.1HE3/5AT
- Part No.:
- TPSMA9.1HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA9.1HE3/5AT.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,037
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Product details
Overview
TPSMA9.1HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping inductive switching surges and lightning-induced transients. It features 9.1 V breakdown voltage (VBR), 7.78 V stand-off voltage (VWM), 29.9 V 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 signal-line protection.
For engineers reviewing the TPSMA9.1HE3/5AT datasheet, TPSMA9.1HE3/5AT pinout, TPSMA9.1HE3/5AT application, or TPSMA9.1HE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1.0 μA max reverse leakage at VWM, thermal stability at TJ = 185 °C, and compatibility with standard SMA PCB footprints.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature reliability and fast transient response. Its unidirectional architecture provides low clamping voltage during positive-going surges while blocking reverse conduction until breakdown.
Designed for repetitive surge suppression under 0.01 % duty cycle, it delivers stable performance across -65 °C to +185 °C operating range and meets MSL Level 1 reflow requirements (peak 260 °C). The device is qualified to AEC-Q101 and RoHS-compliant with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 8.65 / 9.10 / 9.55 V - ensures reliable triggering above system operating voltage with tight tolerance |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA |
| VC @ IPPM = 50 A | 29.9 V - clamped voltage during worst-case 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak pulse power handling capability per JEDEC-standard waveform |
| TJ max. | +185 °C - enables use in under-hood automotive environments without derating |
| Polarity | Unidirectional - protects against positive transients only; cathode marked by band |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 0.208" x 0.157" footprint and 0.060" lead pitch |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode (non-banded end) | Cathode of internal PN junction | Typically tied to system ground or low-impedance return path for clamping |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term reliability under thermal cycling and humidity |
| AEC-Q101 qualification | Validated for automotive-grade applications including engine control, ADAS sensors, and infotainment interfaces |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving clamping precision |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-related damage |
| Fast response time | Sub-nanosecond turn-on enables protection of high-speed digital interfaces and analog front-ends |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground to limit transient voltage to safe levels. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs by clamping surges to ≤29.9 V at 50 A. | Use Scenario: Shielding digital input modules in programmable logic controllers from relay coil flyback and ESD events in factory automation systems. IC Role / Device Role / Timing Role: Standoff protection element mounted directly at connector entry point to absorb energy before reaching isolation barriers. Use Value: Maintains signal integrity under repeated 400 W surges while supporting wide ambient temperature operation (-40 °C to +85 °C). |
| Telecom Line Interface | Consumer Power Adapter Feedback Loop |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced common-mode surges on twisted-pair lines. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pair, coordinated with primary gas discharge tube for staged protection. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (1 kV line-to-ground) when combined with proper layout and filtering. | Use Scenario: Securing optocoupler feedback paths in AC/DC adapters against transformer leakage spikes and mains transients. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor across secondary-side error amplifier inputs. Use Value: Avoids false regulation trips by limiting transient excursions to <30 V while adding <1 pF parasitic capacitance. |
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 | VBR = 9.0 V min, VC = 14.4 V @ 27.8 A, lower PPPM = 400 W but lower clamping voltage at reduced current | Higher current density required; less margin for high-energy surges | Select when tighter clamping at moderate currents is prioritized over full 50 A surge handling |
| SMCJ9.0A | Same VBR/VC specs but in larger SMC (DO-214AB) package; higher thermal mass supports longer surge duration | Requires larger PCB area; better suited for industrial motor drives with sustained overvoltage | Choose for applications needing >100 ms surge endurance or improved thermal dissipation |
Compared with SMAJ9.0A and SMCJ9.0A, the TPSMA9.1HE3/5AT offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and verified 50 A clamping performance - making it preferred for space-constrained automotive and portable industrial designs where both size and reliability are critical.
Availability
TPSMA9.1HE3/5AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input circuits, telecom line interface shielding, and consumer power adapter feedback loop safeguarding requiring stable component supply and traceable sourcing.
Supply support for TPSMA9.1HE3/5AT 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 reliability, thermal performance, and automotive qualification.
The TPSMA9.1HE3/5AT belongs to Vishay's PAR® series of surface-mount TVS diodes, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the breakdown voltage specification for TPSMA9.1HE3/5AT?
The TPSMA9.1HE3/5AT has a guaranteed breakdown voltage (VBR) range of 8.65 V (minimum) to 9.55 V (maximum) at 1.0 mA test current, with a typical value of 9.10 V. This parameter defines the voltage threshold at which the device transitions from high-impedance blocking to low-impedance clamping behavior, and is measured per ANSI/IEEE C62.35 standards using square-wave pulses.
Is TPSMA9.1HE3/5AT qualified for automotive applications?
Yes, the TPSMA9.1HE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified versions. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and cabin electronics.
What is the maximum clamping voltage of TPSMA9.1HE3/5AT under surge conditions?
The TPSMA9.1HE3/5AT exhibits a maximum clamping voltage (VC) of 29.9 V when subjected to a 10/1000 μs surge waveform at 50 A peak pulse current. This value represents the upper limit of voltage seen by protected circuitry during worst-case transient events and is measured with specified PCB mounting conditions (0.2" × 0.2" copper pads).
Does TPSMA9.1HE3/5AT have unidirectional or bidirectional polarity?
The TPSMA9.1HE3/5AT is strictly unidirectional, meaning it conducts only during positive voltage excursions relative to its cathode terminal. Polarity is marked by a visible color band on the cathode end, and the device does not provide symmetrical clamping for negative transients - bidirectional protection requires pairing with another device or selecting a dedicated bidirectional variant.
What package type and mounting specifications apply to TPSMA9.1HE3/5AT?
The TPSMA9.1HE3/5AT uses the SMA (DO-214AC) surface-mount package with standardized dimensions: 4.93 mm × 3.99 mm body, 2.54 mm lead pitch, and 1.98 mm lead width. It is compatible with IPC-7351B footprint recommendations and supports reflow soldering per J-STD-020 MSL Level 1 (260 °C peak).
TPSMA9.1HE3/5AT 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):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
TPSMA9.1HE3/5AT FAQ
1.How can I place an order for TPSMA9.1HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA9.1HE3/5AT 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 TPSMA9.1HE3/5AT reliable?
The price and inventory of TPSMA9.1HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA9.1HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA9.1HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA9.1HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA9.1HE3/5AT?
TPSMA9.1HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA9.1HE3/5AT 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 TPSMA9.1HE3/5AT?
For technical support, including TPSMA9.1HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA9.1HE3/5AT requirements.
6.How does Aetrix verify that TPSMA9.1HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA9.1HE3/5AT 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 TPSMA9.1HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA9.1HE3/5AT?
All TPSMA9.1HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA9.1HE3/5AT, 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 TPSMA9.1HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA9.1HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA9.1HE3/5AT Tags
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