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Vishay General Semiconductor - Diodes Division TPSMA9.1AHM3_B/H
- Part No.:
- TPSMA9.1AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA9.1AHM3_B/H.pdf
- Description:
- TVS DIODE 7.78VWM 13VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,934
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Product details
Overview
TPSMA9.1AHM3_B/H 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 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 - deployed in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the TPSMA9.1AHM3_B/H datasheet, TPSMA9.1AHM3_B/H pinout, TPSMA9.1AHM3_B/H application, or TPSMA9.1AHM3_B/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal derating behavior, clamping performance under surge conditions, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity enables robust protection against positive-going transients while maintaining low leakage (<10 µA at VWM) and fast response time - critical for safeguarding MOSFET gates and microcontroller I/O pins.
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a +0.060 %/°C temperature coefficient of VBR, enabling predictable clamping across -65 °C to +185 °C operating range. Mounting on 5.0 mm × 5.0 mm copper pads ensures thermal reliability under repetitive 0.01 % duty cycle surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 8.65 / 9.10 / 9.55 V at 1.0 mA - defines precise voltage threshold where avalanche conduction begins, ensuring consistent turn-on during overvoltage events |
| VWM | 7.78 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR for DC-biased lines |
| VC @ IPPM | 29.9 V at 50 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry |
| PPPM | 400 W - peak pulse power handling capability; defines survivability against lightning-induced or inductive-switching transients |
| TJ max. | +185 °C - enables use in under-hood automotive environments and high-power industrial enclosures without thermal derating penalties |
| Leakage @ VWM | 10 µA at 25 °C - ensures minimal power loss and signal integrity degradation in battery-powered or high-impedance sensing circuits |
| AEC-Q101 | Qualified - confirms reliability validation for automotive electronics per stress-test requirements including HTGB, HTRB, and temperature cycling |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to lower-potential side (e.g., ground or return path); forms low-impedance shunt to divert surge energy |
| Cathode | Current exit point during clamping; marked with band | Connected to protected line (e.g., 12 V rail or CAN bus); establishes reverse-bias standoff until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure reduces leakage drift and improves long-term stability under thermal cycling |
| MSL Level 1 | Reflow-compatible up to 260 °C peak, eliminating pre-bake requirements and supporting standard SMT assembly |
| Halogen-free construction | Meets IEC 61249-2-21 and JEDEC J-STD-020; supports environmentally regulated automotive and industrial supply chains |
| Low clamping ratio (VC/VBR) | 3.29 - indicates efficient energy absorption with minimal overvoltage overshoot during fast transients |
| JESD201 Class 2 whisker resistance | Validated for high-reliability applications requiring zero tin whisker risk in hermetic or high-vibration environments |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on 5 V or 12 V sensor supply rails before they reach ADC inputs or op-amp front-ends. Use Value: Maintains signal fidelity by limiting clamped voltage to ≤29.9 V while surviving 400 W surges - preventing latch-up or permanent damage to precision analog circuitry. | Use Scenario: Safeguarding digital input channels on programmable logic controllers interfacing with 24 V DC field devices subject to inductive kickback. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed between field wiring and optocoupler input, absorbing energy from relay coil de-energization. Use Value: Enables reliable operation at +185 °C ambient with <10 µA leakage, reducing false triggering and extending maintenance intervals in factory automation systems. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from ESD and lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs, working in coordination with common-mode chokes and secondary-stage protection. Use Value: Provides 29.9 V clamping at 50 A with sub-nanosecond response, meeting IEC 61000-4-5 Level 3 (1 kV/2 kV) surge immunity requirements. | Use Scenario: Protecting USB-C and barrel-jack inputs of wall adapters against user-handling ESD and accidental AC-line transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary-side DC input, placed upstream of switching controller ICs and bulk capacitors. Use Value: Halogen-free, AEC-Q101-qualified construction satisfies OEM sustainability mandates while delivering 400 W surge resilience in compact SMA footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Higher package thermal mass (SMB/DO-214AA), 9.0 V VBR, 27.7 V VC @ 52.2 A, same PPPM | Better thermal dissipation for higher average surge duty cycles; larger PCB footprint required | Select when board layout allows SMB size and sustained surge energy exceeds SMA thermal limits |
| 1.5SMC9.0A | Higher PPPM (1500 W), DO-214AB package, 9.0 V VBR, 14.4 V VC @ 104 A | Designed for primary-level lightning protection; lower clamping voltage but significantly larger and less suitable for space-constrained sensor nodes | Choose for front-end AC/DC input stages where 1500 W rating and lower VC outweigh size constraints |
Compared with SMBJ9.0A and 1.5SMC9.0A, the TPSMA9.1AHM3_B/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and precise 9.1 V clamping threshold - making it preferred for automotive-grade sensor modules and miniaturized industrial edge nodes where board space and regulatory alignment are critical.
Availability
TPSMA9.1AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPSMA9.1AHM3_B/H 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 high-reliability, high-temperature, and automotive-qualified solutions.
The TPSMA9.1AHM3_B/H belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and extended temperature operation.
FAQ
What is the breakdown voltage tolerance for TPSMA9.1AHM3_B/H?
The TPSMA9.1AHM3_B/H 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 ensures consistent clamping behavior across production lots and supports reliable design margining in automotive and industrial systems where precise overvoltage thresholds are critical. The TPSMA9.1AHM3_B/H maintains this specification under full temperature range (-65 °C to +185 °C) with documented temperature coefficient.
Is TPSMA9.1AHM3_B/H qualified for automotive use?
Yes, the TPSMA9.1AHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling to ensure reliability in under-hood and chassis-mounted applications. The TPSMA9.1AHM3_B/H is explicitly designated for automotive sensor units and ECUs per Vishay's ordering documentation.
What is the maximum clamping voltage of TPSMA9.1AHM3_B/H under surge conditions?
The TPSMA9.1AHM3_B/H has a maximum clamping voltage (VC) of 29.9 V at 50 A peak pulse current using the standardized 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case transient events and is measured under defined PCB mounting conditions (0.2" × 0.2" copper pads). The TPSMA9.1AHM3_B/H achieves this with a clamping ratio of 3.29, confirming effective energy diversion without excessive overvoltage overshoot.
Does TPSMA9.1AHM3_B/H meet lead-free and halogen-free compliance standards?
Yes, the TPSMA9.1AHM3_B/H is both RoHS-compliant and halogen-free, meeting IEC 61249-2-21 and JEDEC J-STD-020 requirements. The HM3 suffix explicitly denotes halogen-free molding compound and matte tin-plated leads. It also passes JESD201 Class 2 whisker testing, making the TPSMA9.1AHM3_B/H suitable for high-reliability aerospace, medical, and automotive applications where material restrictions and long-term interconnect integrity are mandated.
How does thermal derating affect TPSMA9.1AHM3_B/H's surge capability above 25 °C?
The TPSMA9.1AHM3_B/H's peak pulse power (PPPM) is derated linearly above 25 °C ambient, following the curve in Figure 2 of datasheet 88405: at +125 °C, it retains ~60 % of its 400 W rating, and at +175 °C, ~25 %. This derating is based on junction temperature limits (TJ ≤ 185 °C) and assumes standard PCB mounting (5.0 mm × 5.0 mm copper pads per terminal). The TPSMA9.1AHM3_B/H remains fully functional within its specified TJ range, with no change to VBR or VC values beyond temperature-coefficient scaling.
TPSMA9.1AHM3_B/H 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA9.1AHM3_B/H FAQ
1.How can I place an order for TPSMA9.1AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA9.1AHM3_B/H 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 TPSMA9.1AHM3_B/H reliable?
The price and inventory of TPSMA9.1AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA9.1AHM3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA9.1AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA9.1AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA9.1AHM3_B/H?
TPSMA9.1AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA9.1AHM3_B/H 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 TPSMA9.1AHM3_B/H?
For technical support, including TPSMA9.1AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA9.1AHM3_B/H requirements.
6.How does Aetrix verify that TPSMA9.1AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA9.1AHM3_B/H 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 TPSMA9.1AHM3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA9.1AHM3_B/H?
All TPSMA9.1AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA9.1AHM3_B/H, 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 TPSMA9.1AHM3_B/H part is unused and in its original packaging.
Return procedure for TPSMA9.1AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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