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Vishay General Semiconductor - Diodes Division TPSMA9.1AHE3_B/I
- Part No.:
- TPSMA9.1AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA9.1AHE3_B/I.pdf
- Description:
- TVS DIODE 7.78VWM 13VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,242
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Product details
Overview
TPSMA9.1AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast voltage transients on power and signal lines. It features a 9.1 V nominal 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 - ideal for automotive sensor line protection.
For engineers reviewing the TPSMA9.1AHE3_B/I datasheet, TPSMA9.1AHE3_B/I pinout, TPSMA9.1AHE3_B/I application, or TPSMA9.1AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1.0 µA reverse leakage at VWM, thermal stability at TJ = 185 °C, and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping response under 10/1000 µs transients. Its junction design supports stable operation across -65 °C to +185 °C, with temperature coefficient of VBR at +0.060 %/°C.
Rated for 400 W non-repetitive peak pulse power and 40 A IFSM (8.3 ms half-sine), it meets MSL Level 1 (260 °C reflow peak) and is RoHS-compliant with matte tin-plated leads. The cathode band denotes polarity on the SMA package body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 8.65 / 9.10 / 9.55 V - ensures reliable turn-on above system operating voltage while avoiding false triggering |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA, matching 8–9 V rail applications |
| VC @ IPPM = 50 A | 29.9 V - clamped voltage during 10/1000 µs surge, limiting downstream IC stress to safe levels |
| PPPM | 400 W - peak transient energy handling capability under standard lightning/surge waveform |
| TJ max. | +185 °C - enables use in under-hood automotive environments without derating |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct orientation in circuit |
| Leakage @ VWM | 1.0 µA at 25 °C - minimal standby power loss and signal integrity impact on high-impedance nodes |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with UL 94 V-0 rating; cathode indicated by color band; terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Current exit terminal during forward conduction; clamping node during reverse transient | Connected to protected line (e.g., CAN_H, LIN, sensor supply); absorbs surge energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JEDEC standards |
| Junction passivation | Reduces surface leakage and improves long-term stability under high humidity and bias stress |
| MSL Level 1 | Supports single-reflow assembly at 260 °C peak without popcorn or delamination risk |
| Low clamping ratio (VC/VBR ≈ 3.3) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| Fast response time | Sub-nanosecond turn-on ensures suppression before transient propagates to sensitive inputs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VOUT and chassis ground to limit voltage excursions to ≤30 V. Use Value: Prevents latch-up or gate oxide damage in downstream ADC input stages during 100 V/50 ms load dump events. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controller modules subjected to relay coil flyback. IC Role / Device Role / Timing Role: Standoff device absorbing 400 W surges induced by inductive switching on field wiring. Use Value: Enables >100,000 actuation cycles without degradation, verified per IEC 61000-4-5 Level 3 (1 kV/2 Ω) |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding RS-485 transceiver pins from lightning-induced surges on outdoor data links. IC Role / Device Role / Timing Role: Primary clamping element on differential bus lines, coordinated with common-mode chokes. Use Value: Maintains signal integrity below 25 Mbps while surviving 10/700 µs telecom surge waveforms up to 4 kV. | Use Scenario: Adding secondary-level surge immunity to 12 V DC output rails of wall-mounted AC/DC adapters. IC Role / Device Role / Timing Role: Final-stage protector between regulator output and USB-C PD port, rated for repetitive 10/1000 µs events. Use Value: Complies with UL 62368-1 Annex D requirements for limited power circuits with <1 µA leakage at 12 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | VBR = 9.0 V min, VC = 14.4 V @ 29.3 A, PPPM = 400 W, same SMA package | Lower clamping voltage but reduced surge current rating; not AEC-Q101 qualified | Select when automotive qualification is unnecessary and tighter clamping is prioritized over surge margin |
| 1.5SMC9.0A | VBR = 9.0 V min, VC = 14.4 V @ 29.3 A, PPPM = 1500 W, larger SMC (DO-214AB) package | Higher power rating and thermal mass, but incompatible footprint and higher parasitic inductance | Choose for industrial systems requiring >1 kW surge handling where board space allows SMC mounting |
Compared with SMAJ9.0A and 1.5SMC9.0A, the TPSMA9.1AHE3_B/I delivers AEC-Q101 compliance, +185 °C operation, and optimized low-leakage performance for automotive and high-reliability embedded designs - without sacrificing 400 W surge capability or SMA footprint compatibility.
Availability
TPSMA9.1AHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer power adapter designs requiring stable component supply, AEC-Q101 traceability, and high-temperature reliability.
Supply support for TPSMA9.1AHE3_B/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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for robust, high-temperature-stable clamping in automotive and industrial environments where sustained 150–185 °C operation is required.
FAQ
What is the AEC-Q101 qualification status of the TPSMA9.1AHE3_B/I?
The TPSMA9.1AHE3_B/I carries full AEC-Q101 qualification, confirmed in Vishay's official documentation (Doc. #88405, Rev. 23-Jan-2024). This includes stress testing for temperature cycling, high-temperature reverse bias, and ESD per JESD22-A114. The HE3 suffix explicitly denotes AEC-Q101 qualification and RoHS compliance, making TPSMA9.1AHE3_B/I suitable for automotive powertrain and body electronics applications.
Does the TPSMA9.1AHE3_B/I have bidirectional or unidirectional polarity?
The TPSMA9.1AHE3_B/I is strictly unidirectional, as stated in the Vishay datasheet under FEATURES and ELECTRICAL CHARACTERISTICS. It conducts only during positive transients relative to its cathode and must be oriented with cathode toward the protected line. No bidirectional variant exists in the TPSMA6.8A–TPSMA43A family - all parts are unidirectional, confirmed by polarity specification and test conditions referencing reverse-biased operation.
What is the maximum clamping voltage of the TPSMA9.1AHE3_B/I and at what current is it specified?
The maximum clamping voltage (VC) of the TPSMA9.1AHE3_B/I is 29.9 V, measured at IPPM = 50 A using the standardized 10/1000 µs double-exponential surge waveform. This value is listed in the ELECTRICAL CHARACTERISTICS table (page 2, Doc. #88405) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can the TPSMA9.1AHE3_B/I be used in place of the TPSMA9.0A?
No direct replacement exists - TPSMA9.0A is not a valid Vishay part number. The closest documented variant is TPSMA9.1A, which matches TPSMA9.1AHE3_B/I in electrical specs and package. Any substitution must verify identical marking code (AMP), breakdown tolerance (±5%), and qualification status (HE3 = AEC-Q101). Always cross-check the full ordering code and revision letter (B/I) to ensure tape-and-reel configuration and RoHS/halogen-free compliance align with production requirements.
What is the thermal resistance junction-to-ambient (RθJA) for the TPSMA9.1AHE3_B/I in standard PCB layout?
Vishay does not publish RθJA for the TPSMA9.1AHE3_B/I in Doc. #88405. Thermal performance is characterized indirectly via derating curves (Fig. 2) and maximum power dissipation (PD = 1.0 W at TA = 25 °C). For thermal design, use the 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout specified in Note (2), and apply derating per Fig. 2 - e.g., at 100 °C ambient, TPSMA9.1AHE3_B/I retains ~65 % of rated PPPM.
TPSMA9.1AHE3_B/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:
- Active
- 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_B/I FAQ
1.How can I place an order for TPSMA9.1AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA9.1AHE3_B/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_B/I reliable?
The price and inventory of TPSMA9.1AHE3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA9.1AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA9.1AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA9.1AHE3_B/I?
TPSMA9.1AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA9.1AHE3_B/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_B/I?
For technical support, including TPSMA9.1AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA9.1AHE3_B/I requirements.
6.How does Aetrix verify that TPSMA9.1AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA9.1AHE3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA9.1AHE3_B/I?
All TPSMA9.1AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA9.1AHE3_B/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_B/I part is unused and in its original packaging.
Return procedure for TPSMA9.1AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA9.1AHE3_B/I Tags
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