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Vishay General Semiconductor - Diodes Division TPSMA39AHE3_B/H
- Part No.:
- TPSMA39AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39AHE3_B/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,130
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Product details
Overview
TPSMA39AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for clamping inductive switching and lightning-induced transients on power rails and signal lines. It features a 39.0 V 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 maximum junction temperature, and SMA (DO-214AC) package - used in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMA39AHE3_B/H datasheet, TPSMA39AHE3_B/H pinout, TPSMA39AHE3_B/H application, or TPSMA39AHE3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, thermal derating above 25 °C, and compatibility with standard SMA PCB footprints.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds its 39.0 V nominal breakdown threshold. Its passivated anisotropic rectifier technology ensures stable VBR drift (0.091 %/°C) and low incremental surge resistance, enabling consistent clamping across temperature.
Designed for high-reliability environments, the TPSMA39AHE3_B/H supports continuous operation up to 185 °C junction temperature and meets MSL Level 1 reflow requirements (260 °C peak). It is RoHS-compliant, halogen-free optional (HM3 suffix), and qualified to AEC-Q101 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 V / 39.0 V / 41.0 V - defines precise clamping onset voltage at 1 mA test current |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage rises significantly |
| VC @ IPPM | 53.9 V at 7.4 A - peak clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak pulse power handling capability under standardized transient waveform |
| TJ max. | +185 °C - enables use in under-hood automotive or high-temperature industrial enclosures |
| IR @ VWM | 1.0 µA - ultra-low reverse leakage preserves standby power integrity in battery-powered systems |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement |
Pinout & Package
The TPSMA39AHE3_B/H is housed in an SMA (DO-214AC) plastic package with two terminals: cathode (marked by color band) and anode. The device is unidirectional and must be oriented with cathode toward the higher-potential side of the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient conduction path | Connects to the line being protected; conducts surge current to ground when VREV > VBR |
| Anode | Reference node | Typically connected to system ground or lower-potential rail; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| 185 °C junction rating | Supports operation in engine control units, powertrain modules, and other high-ambient-temperature locations |
| 0.091 %/°C VBR tempco | Ensures predictable clamping voltage shift across -65 °C to +185 °C operating range |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak without preconditioning |
| 400 W 10/1000 µs pulse rating | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge waveforms in automotive designs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power inputs in body control modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and chassis ground to shunt surge energy away from PMICs and microcontrollers. Use Value: Limits transient voltage to ≤53.9 V, preventing latch-up or permanent damage to downstream 3.3 V/5 V logic supplies. | Use Scenario: Safeguarding analog input pins of industrial temperature/pressure sensors exposed to EMI and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional clamping element on signal lines (e.g., 4–20 mA loop or RS-485 bus) to suppress fast-rising transients. Use Value: Maintains signal integrity by clamping spikes within 1 ns response time while adding <1 pF capacitance at 0 V bias. |
| Consumer Device USB Port Protection | Telecom Equipment DC Power Input Protection |
Use Scenario: Adding secondary overvoltage protection on USB VBUS lines in portable docking stations and power banks. IC Role / Device Role / Timing Role: Standby-mode TVS that activates only during fault conditions, minimizing standby current draw. Use Value: Delivers 1.0 µA leakage at 33.3 V, preserving battery life while meeting IEC 61000-4-5 Level 3 surge immunity. | Use Scenario: Front-end protection for AC/DC converter outputs feeding telecom base station subsystems. IC Role / Device Role / Timing Role: High-energy clamping device absorbing repetitive lightning-induced surges on 48 V DC distribution buses. Use Value: Handles 400 W pulses with 0.01 % duty cycle, enabling robust protection without thermal runaway in continuous operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39A | Same VBR (39 V), but SMB package (DO-214AA); 600 W PPPM; larger footprint and higher thermal mass | Better suited for higher-energy transients where board space allows; not drop-in compatible due to different pad layout | Select SMBJ39A if surge energy exceeds 400 W or thermal dissipation margin is critical |
| SMCJ39A | Same VBR, SMC package (DO-214AB); 1500 W PPPM; 2× larger footprint than SMA | Used in heavy-duty industrial power supplies requiring multi-kW surge handling; incompatible with SMA land pattern | Choose SMCJ39A for applications demanding >1 kW peak pulse capability and higher IFSM (100 A) |
Compared with SMBJ39A and SMCJ39A, the TPSMA39AHE3_B/H offers optimal balance of compact size, AEC-Q101 qualification, and 400 W surge rating - making it ideal for space-constrained automotive and industrial PCBs where strict qualification and standardized SMA mounting are required.
Availability
TPSMA39AHE3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer USB power management, and telecom DC input protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for TPSMA39AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-temperature performance.
The TPSMA39AHE3_B/H belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for robust electrostatic and surge protection in harsh environments including automotive, industrial, and telecommunications infrastructure.
FAQ
What is the breakdown voltage tolerance for TPSMA39AHE3_B/H?
The TPSMA39AHE3_B/H has a specified breakdown voltage range of 37.1 V (minimum) to 41.0 V (maximum) at 1.0 mA test current, with 39.0 V as the nominal value. This ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in automotive and industrial applications where precise overvoltage thresholds are critical.
Is TPSMA39AHE3_B/H suitable for bidirectional transient protection?
No, the TPSMA39AHE3_B/H is a unidirectional TVS diode and is not rated for bidirectional operation. It conducts only during reverse-biased overvoltage events. For bidirectional protection - such as on AC lines or differential data buses - a dedicated bidirectional part like TPSMA39CA must be selected instead.
Does TPSMA39AHE3_B/H meet automotive qualification standards?
Yes, the TPSMA39AHE3_B/H carries the HE3 suffix, indicating RoHS-compliance and full AEC-Q101 qualification. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114, making it approved for use in automotive powertrain, body electronics, and ADAS subsystems.
What is the maximum clamping voltage of TPSMA39AHE3_B/H under surge conditions?
The TPSMA39AHE3_B/H exhibits a maximum clamping voltage (VC) of 53.9 V when subjected to its rated 7.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across temperature and ensures downstream ICs see no more than 53.9 V during worst-case transient events.
Can TPSMA39AHE3_B/H be used in high-humidity or outdoor environments?
Yes - the TPSMA39AHE3_B/H uses UL 94 V-0 rated molding compound and matte tin-plated leads compliant with J-STD-002, providing resistance to moisture ingress and corrosion. Its -65 °C to +185 °C operating range and AEC-Q101 qualification confirm suitability for sealed outdoor enclosures and under-hood automotive locations.
TPSMA39AHE3_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):
- 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_B/H FAQ
1.How can I place an order for TPSMA39AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39AHE3_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 TPSMA39AHE3_B/H reliable?
The price and inventory of TPSMA39AHE3_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 TPSMA39AHE3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA39AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39AHE3_B/H?
TPSMA39AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39AHE3_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 TPSMA39AHE3_B/H?
For technical support, including TPSMA39AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39AHE3_B/H requirements.
6.How does Aetrix verify that TPSMA39AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA39AHE3_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 TPSMA39AHE3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA39AHE3_B/H?
All TPSMA39AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39AHE3_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 TPSMA39AHE3_B/H part is unused and in its original packaging.
Return procedure for TPSMA39AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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