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Vishay General Semiconductor - Diodes Division TPSMA39AHE3_A/H
- Part No.:
- TPSMA39AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39AHE3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,687
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Product details
Overview
TPSMA39AHE3_A/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 39.0 V nominal breakdown voltage (VBR), 53.9 V maximum clamping voltage (VC) at 7.4 A peak pulse current, 400 W peak pulse power (10/1000 µs), 185 °C max junction temperature, and AEC-Q101 qualification - used to protect automotive sensor interfaces and industrial control inputs.
For engineers reviewing the TPSMA39AHE3_A/H datasheet, TPSMA39AHE3_A/H pinout, TPSMA39AHE3_A/H application, or TPSMA39AHE3_A/H equivalent, key selection criteria include unidirectional polarity, 33.3 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, 0.091 %/°C temperature coefficient of VBR, and compatibility with automated SMT assembly under J-STD-020 MSL Level 1.
Technical Context
This TVS diode operates as a voltage-clamping protection device in parallel with sensitive circuit nodes, triggering into avalanche conduction when transient voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier technology ensures stable performance across -65 °C to +185 °C operating range and enables reliable operation under high-temperature automotive conditions.
The device delivers 400 W peak pulse power handling per 10/1000 µs waveform with 0.01 % duty cycle, exhibits fast response time (<1 ns), and maintains low incremental surge resistance to minimize clamping overshoot during ESD or lightning-induced surges on 12 V and 24 V automotive supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 39.0 V - precise avalanche breakdown threshold for predictable clamping onset |
| VC @ IPPM | 53.9 V at 7.4 A - maximum clamped voltage seen by protected IC during 400 W transient |
| VWM | 33.3 V - maximum continuous working voltage before leakage rises above 1.0 µA |
| PPPM | 400 W - surge energy absorption capability per 10/1000 µs waveform |
| TJ max. | +185 °C - supports under-hood automotive applications without derating |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band marked |
| AEC-Q101 | Qualified - validated for automotive reliability per stress test requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Cathode of internal avalanche junction | Typically connected to system ground or low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR and low leakage over lifetime and temperature cycling |
| 185 °C junction rating | Eliminates thermal derating in engine-control units and ADAS modules |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surge events |
| MSL Level 1 compliance | Allows standard SMT reflow without moisture sensitivity concerns |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive use including vibration, temperature cycling, and HTRB |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Parallel-connected clamping device that limits voltage excursion to ≤53.9 V during 400 W surges, preserving signal integrity and preventing latch-up in downstream ASICs. Use Value: Enables robust operation in AEC-Q100 Grade 1 environments with no additional series impedance or timing delay. | Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges and electrostatic discharge in factory automation cabinets. IC Role / Device Role / Timing Role: Fast-acting voltage clamp placed directly at connector entry point to divert >7 A transient current away from optocoupler or Schmitt-trigger input stages. Use Value: Maintains <1 ns response time and holds clamped voltage below 54 V, ensuring immunity to IEC 61000-4-4 EFT and 61000-4-5 surge tests. |
| Telecom Power Rail Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding DC power inputs of base station remote radio units and PoE-powered devices against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 48 V DC input rail, coordinated with upstream fuses and secondary filtering. Use Value: Delivers 400 W pulse handling with 0.091 %/°C VBR drift, enabling stable protection across -40 °C to +85 °C ambient. | Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine motor control boards from back-EMF spikes generated by brushed DC motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed across motor coil terminals and MCU input pins to clamp negative flyback and positive switching transients. Use Value: Withstands repetitive 40 A IFSM surges and operates reliably at TJ = 185 °C near heat-generating power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36AHE3/A | Higher VWM (30.8 V), lower VC (58.1 V), same PPPM (400 W), SMB package (larger footprint) | Less margin below 39 V rail; requires PCB layout change due to larger SMB (DO-214AA) footprint | Select when higher surge current rating (10.3 A vs. 7.4 A) and lower clamping ratio are prioritized over board space |
| TPSMA36AHE3_A/H | Lower VBR (36.0 V), lower VC (49.9 V), identical package and AEC-Q101 qualification | Better suited for 33 V nominal systems; clamps 4 V lower but triggers earlier, increasing leakage risk in marginal bias conditions | Choose for tighter 33 V rail protection where 39 V standoff is excessive and earlier clamping is acceptable |
Compared with SMBJ36AHE3/A and TPSMA36AHE3_A/H, the TPSMA39AHE3_A/H offers optimal balance of 33.3 V working voltage margin and 53.9 V clamping for 36–39 V automotive subsystems, with minimal PCB area impact and full AEC-Q101 traceability.
Availability
TPSMA39AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom power rails, and consumer appliance motor drives requiring stable component supply and AEC-Q101 assurance.
Supply support for TPSMA39AHE3_A/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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The TPSMA39AHE3_A/H belongs to Vishay's PAR® (Protection Against Transients) family of TVS diodes, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments.
FAQ
What is the maximum clamping voltage of the TPSMA39AHE3_A/H under specified test conditions?
The TPSMA39AHE3_A/H has a maximum clamping voltage (VC) of 53.9 V when subjected to its rated peak pulse current of 7.4 A using a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the upper voltage limit imposed on protected circuitry during transient events. The TPSMA39AHE3_A/H achieves this clamping performance while maintaining low dynamic impedance, making it suitable for safeguarding sensitive 36 V-rated components in automotive ECUs.
Is the TPSMA39AHE3_A/H qualified for automotive applications?
Yes, the TPSMA39AHE3_A/H carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (UHAST), confirming suitability for automotive under-hood and body-control module applications. The TPSMA39AHE3_A/H operates up to +185 °C junction temperature, supporting extended thermal margins required by AEC-Q100 Grade 0 and 1 systems.
What does the "HE3" suffix indicate in TPSMA39AHE3_A/H?
The "HE3" suffix in TPSMA39AHE3_A/H denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements. The "_A/H" further specifies revision A and packaging in 7" tape-and-reel (H code). This distinguishes it from HM3 variants (halogen-free) and non-qualified base parts, ensuring traceable compliance for automotive production. The TPSMA39AHE3_A/H meets all mechanical and reliability criteria defined in the Vishay 88405 datasheet.
How does the TPSMA39AHE3_A/H compare to bidirectional TVS diodes in circuit protection?
The TPSMA39AHE3_A/H is unidirectional and protects only against positive-going transients on DC lines, unlike bidirectional types that guard both polarities. Its 33.3 V stand-off voltage allows safe operation on 36 V nominal rails with margin, while delivering 53.9 V clamping. Bidirectional equivalents would exhibit higher capacitance and reduced VWM for the same VBR, potentially compromising noise immunity. For dedicated 12 V/24 V/36 V automotive power rails, the TPSMA39AHE3_A/H provides superior leakage control and thermal stability.
What is the recommended PCB pad layout for the TPSMA39AHE3_A/H?
Vishay specifies a minimum pad layout of 0.2" x 0.2" (5.0 mm x 5.0 mm) copper areas per terminal to achieve rated 400 W peak pulse power and proper thermal dissipation. The SMA (DO-214AC) package requires alignment with the dimensional drawing in document 88405, including 0.074" maximum height and 0.208" maximum body length. Proper thermal relief and grounding of the anode pad are critical to maintain clamping performance under repetitive surge conditions. The TPSMA39AHE3_A/H must be mounted per J-STD-020 MSL Level 1 reflow profile.
TPSMA39AHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- 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)
TPSMA39AHE3_A/H FAQ
1.How can I place an order for TPSMA39AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39AHE3_A/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 TPSMA39AHE3_A/H reliable?
The price and inventory of TPSMA39AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA39AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39AHE3_A/H?
TPSMA39AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39AHE3_A/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 TPSMA39AHE3_A/H?
For technical support, including TPSMA39AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39AHE3_A/H requirements.
6.How does Aetrix verify that TPSMA39AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA39AHE3_A/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 TPSMA39AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA39AHE3_A/H?
All TPSMA39AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39AHE3_A/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 TPSMA39AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA39AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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