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Vishay General Semiconductor - Diodes Division TPSMA39HE3_A/I
- Part No.:
- TPSMA39HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39HE3_A/I.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,165
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Product details
Overview
TPSMA39HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 53.9 V clamping voltage at 7.4 A peak pulse current, and 400 W peak pulse power with 10/1000 µs waveform. It operates up to +185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the TPSMA39HE3_A/I datasheet, TPSMA39HE3_A/I pinout, TPSMA39HE3_A/I application, or TPSMA39HE3_A/I equivalent, key selection criteria include unidirectional polarity, 33.3 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, TJ = 185 °C capability, and RoHS-compliant matte tin-plated terminals solderable per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge conditions. Its 10/1000 µs waveform rating supports lightning and inductive-switching transient suppression in high-reliability systems, with thermal derating defined up to 185 °C junction temperature.
The device features low incremental surge resistance and fast response time-critical for protecting sensitive downstream components such as MOSFETs and ICs. Its MSL Level 1 rating (260 °C peak reflow) and AEC-Q101 qualification confirm suitability for automated SMT assembly in automotive-grade designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 / 39.0 / 41.0 V at 1 mA - defines precise voltage threshold at which avalanche conduction begins |
| VWM | 33.3 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 400 W transient, limiting stress on protected circuitry |
| PPPM | 400 W (10/1000 µs) - peak surge power handling capacity under standardized transient waveform |
| TJ max. | +185 °C - enables operation in under-hood automotive environments and high-power industrial enclosures |
| IR @ VWM | 1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on systems |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and cathode band marking |
Pinout & Package
SMA (DO-214AC) package with axial lead configuration: molded epoxy body, matte tin-plated terminals, cathode indicated by color band. Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop with minimal inductance |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR performance and low leakage across 185 °C operating range |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive powertrain, body control, and ADAS subsystems |
| MSL Level 1 (260 °C peak) | Supports single-pass lead-free reflow without popcorn or delamination risk |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surge immunity requirements |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through voltage to protect 3.3 V/5 V/12 V logic and power rails |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V/24 V supply rails in BCM, lighting modules, and motor drivers against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to shunt surges exceeding 33.3 V. Use Value: Withstands 400 W pulses and operates reliably at +185 °C, meeting OEM requirements for under-hood placement. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors from ESD and switching noise in factory automation. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) standoff protection element placed directly at connector interface. Use Value: Clamps to 53.9 V while preserving signal fidelity-no loading effect on high-impedance sensor outputs. |
| Telecom DC Power Input | Consumer USB-C Power Delivery |
Use Scenario: Safeguarding -48 V telecom rectifier outputs and PoE injectors against lightning-induced surges on outdoor plant equipment. IC Role / Device Role / Timing Role: Primary transient suppressor on DC input bus, coordinated with upstream fuses and downstream DC-DC converters. Use Value: 33.3 V VWM allows safe operation across wide input tolerance; 53.9 V VC ensures downstream 50 V-rated capacitors remain within rating. | Use Scenario: Secondary-level surge protection on USB-C CC and VBUS lines in portable docking stations and monitors. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp on VBUS rail to absorb hot-plug and ESD events before reaching PD controller. Use Value: Sub-100 ns response time and 1.0 µA leakage prevent interference with USB PD communication and power negotiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Higher VWM (30.8 V), lower VC (58.1 V at 6.9 A), same 400 W rating but SMB package (larger footprint) | Less suitable for space-constrained PCBs; higher thermal mass slows response slightly | Select when board layout permits larger pad area and higher clamping margin is acceptable |
| 1.5SMC39A | Same VBR range, but DO-214AB (SMC) package; 1.5 kW rating (10/1000 µs), higher IPPM (38.9 A) | Designed for higher-energy transients; not drop-in due to larger footprint and different thermal profile | Choose for industrial mains-connected equipment requiring >400 W surge headroom |
Compared with SMBJ36A and 1.5SMC39A, the TPSMA39HE3_A/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and precise 33.3 V standoff-making it preferred for automotive and dense consumer PCBs where board space and qualification compliance are critical.
Availability
TPSMA39HE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC inputs, and consumer USB-C power delivery systems requiring stable component supply and long-term lifecycle support.
Supply support for TPSMA39HE3_A/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 devices, and optoelectronics with emphasis on reliability, high-temperature operation, and automotive qualification.
The TPSMA39HE3_A/I belongs to Vishay's PAR® series of surface-mount TVS diodes, engineered specifically for robust transient suppression in harsh-environment applications including automotive, industrial controls, and telecommunications infrastructure.
FAQ
What is the breakdown voltage tolerance for TPSMA39HE3_A/I?
The TPSMA39HE3_A/I has a specified breakdown voltage (VBR) range of 37.1 V to 41.0 V at 1.0 mA test current, representing ±5% nominal tolerance around 39.0 V. This tight spread ensures consistent clamping behavior across production lots and supports reliable design margining in safety-critical circuits.
Is TPSMA39HE3_A/I suitable for automotive applications?
Yes, the TPSMA39HE3_A/I is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS compliance and automotive-grade reliability. Its 185 °C maximum junction temperature, MSL Level 1 reflow rating, and validated performance under ISO 7637-2 transients make it appropriate for engine control units, body electronics, and ADAS power supplies.
What does the "A/I" suffix mean in TPSMA39HE3_A/I?
The "A/I" suffix in TPSMA39HE3_A/I indicates packaging: "A" is the revision code (per Vishay's ordering nomenclature), and "I" denotes 13-inch diameter plastic tape-and-reel delivery containing 7500 units. This format supports high-volume SMT assembly with standard pick-and-place feeders.
How does TPSMA39HE3_A/I compare to bidirectional TVS diodes?
The TPSMA39HE3_A/I is unidirectional only, meaning it protects against positive transients on a referenced line (e.g., VCC-to-ground). Unlike bidirectional variants, it cannot suppress negative-going surges on AC or floating lines-but offers lower capacitance and leakage, making it ideal for DC power and signal rails where polarity is fixed.
What is the maximum clamping voltage of TPSMA39HE3_A/I under surge conditions?
The maximum clamping voltage (VC) of TPSMA39HE3_A/I is 53.9 V at 7.4 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is guaranteed across temperature and ensures protected downstream components see no more than 53.9 V during worst-case transient events.
TPSMA39HE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 7.1A
- 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)
TPSMA39HE3_A/I FAQ
1.How can I place an order for TPSMA39HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39HE3_A/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 TPSMA39HE3_A/I reliable?
The price and inventory of TPSMA39HE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39HE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMA39HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39HE3_A/I?
TPSMA39HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39HE3_A/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 TPSMA39HE3_A/I?
For technical support, including TPSMA39HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39HE3_A/I requirements.
6.How does Aetrix verify that TPSMA39HE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMA39HE3_A/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 TPSMA39HE3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMA39HE3_A/I?
All TPSMA39HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39HE3_A/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 TPSMA39HE3_A/I part is unused and in its original packaging.
Return procedure for TPSMA39HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA39HE3_A/I Tags
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