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Vishay General Semiconductor - Diodes Division TPSMA12AHE3/61T
- Part No.:
- TPSMA12AHE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12AHE3/61T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,381
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Product details
Overview
TPSMA12AHE3/61T 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 12.0 V nominal breakdown voltage (VBR), 24.0 A peak pulse current (IPPM), 16.7 V maximum clamping voltage (VC) at IPPM, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive and industrial power rail protection.
For engineers reviewing the TPSMA12AHE3/61T datasheet, TPSMA12AHE3/61T pinout, TPSMA12AHE3/61T application, or TPSMA12AHE3/61T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (via HE3 suffix), MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive 10/1000 µs surge conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping capability. Its junction passivation enables stable operation up to TJ = 185 °C, supporting high-reliability automotive environments where thermal derating must be minimized.
The device responds in sub-nanosecond time to voltage transients and maintains tight VBR tolerance (±5% at 1.0 mA test current) with a positive temperature coefficient of 0.070 %/°C - ensuring predictable clamping voltage shift across temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.40 / 12.0 / 12.60 V - ensures reliable turn-on above system stand-off voltage while avoiding false triggering during normal operation |
| VWM | 10.20 V - maximum continuous reverse working voltage compatible with 12 V nominal supply rails |
| VC @ IPPM | 16.7 V - clamps 24.0 A surge to safe levels for downstream ICs and MOSFETs |
| PPPM | 400 W - handles standard 10/1000 µs lightning-induced surges per IEC 61000-4-5 |
| IFSM | 40 A - withstands 8.3 ms half-sine inrush or fault currents without degradation |
| TJ max. | +185 °C - supports under-hood automotive placement and high-ambient industrial control cabinets |
| Polarity | Unidirectional - protects against positive-going transients only; requires external circuit design for bidirectional immunity |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode indicated by color band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to protected line (e.g., 12 V rail); forms low-impedance path to ground when VAK exceeds VBR |
| Cathode | Current exit point during clamping; marked by color band | Connected to system ground or low-impedance return path; defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive loads |
| 0.070 %/°C VBR tempco | Ensures predictable clamping voltage rise with temperature - critical for thermal stability in engine control units |
| 400 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs, lighting modules, and body control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and chassis ground to clamp transients before they reach LDOs or microcontrollers. Use Value: Clamps 24.0 A surges to ≤16.7 V, preserving 12 V system integrity and preventing latch-up or gate oxide damage in downstream FETs. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules from EFT and surge coupling on long cables. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before reaching op-amp front-end or ADC inputs. Use Value: Sub-nanosecond response and 16.7 V clamping prevent saturation or offset drift in precision signal chains operating near 10–12 V rails. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage, coordinated with upstream fuse and downstream DC-DC converter. Use Value: 400 W rating and 185 °C TJ allow sustained operation in sealed enclosures with minimal derating at elevated ambient temperatures. | Use Scenario: Protecting USB-C or barrel-jack powered consumer devices (e.g., smart speakers, set-top boxes) from accidental AC adapter misconnection or ESD events. IC Role / Device Role / Timing Role: First-line transient suppressor at DC input, placed before input capacitor and protection FET. Use Value: RoHS-compliant HE3 construction and MSL Level 1 enable high-yield SMT manufacturing without process modifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMA package, 12 V VBR, but rated for 400 W with 1.0 mA IT; no AEC-Q101 qualification | Lacks automotive qualification; suitable for commercial/industrial use only | Select if AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| 1.5SMC12A | Higher-power SMC package (1500 W), same VBR and polarity; larger footprint and higher VC (20.1 V) | Used where higher energy handling is needed, but incompatible with space-constrained SMA layouts | Choose only when surge energy exceeds 400 W and PCB real estate permits SMC footprint |
Compared with SMAJ12A and 1.5SMC12A, the TPSMA12AHE3/61T uniquely combines AEC-Q101 qualification, MSL Level 1 compatibility, and precise 16.7 V clamping in the compact SMA outline - making it the preferred choice for automotive and high-reliability industrial designs requiring validated long-term stability.
Availability
TPSMA12AHE3/61T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for TPSMA12AHE3/61T 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, thermal performance, and automotive-grade validation.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient suppressor product line, engineered specifically for high-temperature, high-reliability protection of power and signal lines in automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the TPSMA12AHE3/61T at its rated peak pulse current?
The TPSMA12AHE3/61T has a maximum clamping voltage (VC) of 16.7 V at its rated peak pulse current of 24.0 A (10/1000 µs waveform). This value is measured under standardized test conditions per JEDEC and IEC standards and reflects the actual voltage seen by protected circuitry during a worst-case surge event. The TPSMA12AHE3/61T maintains this clamping performance across its full operating temperature range due to its stable junction design.
Is the TPSMA12AHE3/61T qualified for automotive applications?
Yes, the TPSMA12AHE3/61T is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's official datasheet (Document Number: 88405, Revision: 23-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive systems. The TPSMA12AHE3/61T meets all requirements for use in automotive power distribution and sensor interface modules.
What does the "HE3" suffix indicate in TPSMA12AHE3/61T?
The "HE3" suffix in TPSMA12AHE3/61T denotes RoHS-compliant construction with AEC-Q101 qualification and compliance with JESD 201 Class 2 whisker resistance. It also indicates packaging in 7-inch tape-and-reel format (61T) with 1800 units per reel. The HE3 designation confirms that the TPSMA12AHE3/61T is manufactured to Vishay's automotive-grade process controls and undergoes additional reliability screening beyond standard commercial parts.
Can the TPSMA12AHE3/61T be used in bidirectional protection circuits?
No, the TPSMA12AHE3/61T is unidirectional only, as explicitly stated in the Vishay datasheet. It clamps positive transients relative to ground and conducts only when anode voltage exceeds cathode voltage by ≥VBR. For bidirectional protection, two TPSMA12AHE3/61T devices must be connected in series opposition, or a dedicated bidirectional TVS (e.g., TPSMA12CA) should be selected. Using the TPSMA12AHE3/61T alone in a bidirectional configuration leaves negative transients unprotected.
What is the maximum junction temperature rating for the TPSMA12AHE3/61T?
The TPSMA12AHE3/61T is rated for a maximum junction temperature (TJ) of +185 °C, enabling operation in high-ambient environments such as automotive engine compartments or industrial motor drive enclosures. This rating is supported by its passivated anisotropic rectifier structure and validated through high-temperature life testing. Derating curves in the datasheet show how peak pulse power decreases linearly above 25 °C ambient, and the TPSMA12AHE3/61T retains usable clamping capability even at TJ = 150 °C.
TPSMA12AHE3/61T 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
TPSMA12AHE3/61T FAQ
1.How can I place an order for TPSMA12AHE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12AHE3/61T 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 TPSMA12AHE3/61T reliable?
The price and inventory of TPSMA12AHE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA12AHE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA12AHE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12AHE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12AHE3/61T?
TPSMA12AHE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12AHE3/61T 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 TPSMA12AHE3/61T?
For technical support, including TPSMA12AHE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12AHE3/61T requirements.
6.How does Aetrix verify that TPSMA12AHE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA12AHE3/61T 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 TPSMA12AHE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA12AHE3/61T?
All TPSMA12AHE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12AHE3/61T, 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 TPSMA12AHE3/61T part is unused and in its original packaging.
Return procedure for TPSMA12AHE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA12AHE3/61T Tags
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