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Vishay General Semiconductor - Diodes Division TPSMA11AHM3_B/I
- Part No.:
- TPSMA11AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA11AHM3_B/I.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMA11AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 11.0 V nominal breakdown voltage (VBR), 9.40 V stand-off voltage (VWM), 25.6 V maximum clamping voltage (VC) at 5.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), and 185 °C maximum junction temperature - deployed in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the TPSMA11AHM3_B/I datasheet, TPSMA11AHM3_B/I pinout, TPSMA11AHM3_B/I application, or TPSMA11AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C capability, low clamping ratio (VC/VBR ≈ 2.33), and halogen-free RoHS-compliant construction per ordering suffix HM3.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, activating when reverse voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier technology ensures stable VBR over temperature (αT = 0.067 %/°C) and low incremental surge resistance for effective transient energy diversion.
Designed for high-reliability environments, it supports repetitive 10/1000 µs surge events at 0.01 % duty cycle and meets MSL Level 1 (260 °C peak reflow). The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits fast response time (< 1 ns) to ESD and lightning-induced transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 10.5 V / 11.0 V / 11.6 V - defines precise activation threshold for transient suppression |
| VWM | 9.40 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM = 5.0 A | 25.6 V - clamped voltage during worst-case surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient power handling capacity under standardized 10/1000 µs waveform |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Polarity | Unidirectional - protects against positive transients only; requires correct cathode orientation |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
SMA (DO-214AC) package with axial lead configuration: molded plastic body, cathode band marking, and two terminals - anode and cathode - mounted on PCB using 5.0 mm × 5.0 mm copper pads per terminal per JEDEC standard layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference/ground return path | Typically tied to system ground; completes clamping loop during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±5 % over lifetime and temperature cycling |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including HTGB, HTRB, and TC1000 testing |
| Halogen-free, RoHS-compliant construction | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 requirements |
| Low clamping ratio (VC/VBR) | 2.33 - minimizes overvoltage overshoot during fast transients compared to competing TVS devices |
| Fast response time | < 1 ns - ensures clamping activation prior to damage threshold of sensitive MOSFETs or microcontrollers |
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 in engine control units. IC Role / Device Role / Timing Role: Voltage clamping element placed across signal line and chassis ground, activated within nanoseconds of transient onset. Use Value: Limits induced voltage to ≤25.6 V during 5.0 A surges, preventing latch-up or gate oxide rupture in 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input rails, absorbing repetitive 400 W spikes without degradation. Use Value: Maintains functional integrity under 0.01 % duty cycle surges while supporting 185 °C ambient operation near motor drives. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters subjected to lightning-induced surges on DC output lines. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between +VOUT and GND, clamping flyback spikes from transformer leakage inductance. Use Value: Withstands 40 A 8.3 ms forward surge and maintains 9.40 V hold-off to avoid false triggering during normal regulation. | Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors against induced surges on twisted-pair data lines per IEC 61000-4-5. IC Role / Device Role / Timing Role: Unidirectional clamp on differential pairs, referenced to local ground plane with minimal parasitic inductance. Use Value: Achieves 25.6 V clamping at 5.0 A with <1 ns response, meeting GR-1089-CORE Level 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11AHE3_A/H | Same VBR range (10.5–11.6 V), but lower PPPM = 400 W and no AEC-Q101 qualification (HE3 vs HM3) | Not rated for automotive under-hood use; suitable for commercial-grade consumer electronics | Select when AEC-Q101 is not required and cost sensitivity outweighs halogen-free compliance |
| 1.5SMC11A | Larger SMC (DO-214AB) package, same electrical specs, higher thermal mass but 2× PCB area | Preferred where board space allows and higher IFSM margin is needed beyond 40 A | Choose for legacy designs using SMC footprints or where enhanced surge endurance justifies larger footprint |
Compared with SMAJ11AHE3_A/H and 1.5SMC11A, the TPSMA11AHM3_B/I delivers halogen-free construction, AEC-Q101 qualification, and optimal SMA footprint density - making it the preferred choice for new automotive and high-reliability industrial designs requiring compact, compliant TVS protection.
Availability
TPSMA11AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card surge protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPSMA11AHM3_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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and automotive qualification.
The TPSMAxxA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor product line, engineered specifically for high-temperature, high-reliability clamping in automotive and industrial systems where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the meaning of the 'HM3' suffix in TPSMA11AHM3_B/I?
The 'HM3' suffix in TPSMA11AHM3_B/I indicates halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. This distinguishes it from HE3-suffixed variants (RoHS-compliant but not halogen-free) and confirms compliance with automotive reliability standards including high-temperature bias life testing and temperature cycling. TPSMA11AHM3_B/I is certified for use in safety-critical vehicle subsystems.
Does TPSMA11AHM3_B/I support bidirectional transient suppression?
No, TPSMA11AHM3_B/I is strictly unidirectional and protects only against positive-going transients on the cathode side relative to anode. It cannot suppress negative transients or AC waveforms. For bidirectional protection, a separate device such as TPSMA11CA or paired unidirectional TVS diodes would be required. The datasheet explicitly states "Available in uni-directional polarity only" for the TPSMAxxA family.
What is the maximum clamping voltage of TPSMA11AHM3_B/I and at what test condition is it specified?
The maximum clamping voltage of TPSMA11AHM3_B/I is 25.6 V, measured at a peak pulse current (IPPM) of 5.0 A using the standardized 10/1000 µs double-exponential waveform. This value appears in the Electrical Characteristics table under "MAXIMUM CLAMPING VOLTAGE AT IPPM" and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the temperature coefficient of VBR affect TPSMA11AHM3_B/I performance in high-ambient environments?
The TPSMA11AHM3_B/I has a VBR temperature coefficient (αT) of +0.067 %/°C, meaning its breakdown voltage increases linearly with junction temperature. At 150 °C, VBR rises by ~8.4 % above its 25 °C value - from 11.0 V to ~11.9 V - ensuring continued protection margin without premature conduction. This behavior is documented in Note (3) of the Vishay datasheet 88405.
Is TPSMA11AHM3_B/I compatible with lead-free reflow soldering processes?
Yes, TPSMA11AHM3_B/I is fully compatible with lead-free reflow soldering, meeting J-STD-020 MSL Level 1 with a maximum peak temperature of 260 °C. Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and the molding compound complies with UL 94 V-0 flammability rating - confirming robust thermal stability during standard Pb-free assembly cycles.
TPSMA11AHM3_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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 25.6A
- 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)
TPSMA11AHM3_B/I FAQ
1.How can I place an order for TPSMA11AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA11AHM3_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 TPSMA11AHM3_B/I reliable?
The price and inventory of TPSMA11AHM3_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 TPSMA11AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA11AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA11AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA11AHM3_B/I?
TPSMA11AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA11AHM3_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 TPSMA11AHM3_B/I?
For technical support, including TPSMA11AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA11AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA11AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA11AHM3_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 TPSMA11AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA11AHM3_B/I?
All TPSMA11AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA11AHM3_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 TPSMA11AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA11AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA11AHM3_B/I Tags
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