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Vishay General Semiconductor - Diodes Division TPSMA39AHE3/61T
- Part No.:
- TPSMA39AHE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39AHE3/61T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,727
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Product details
Overview
TPSMA39AHE3/61T 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 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 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 in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA39AHE3/61T datasheet, TPSMA39AHE3/61T pinout, TPSMA39AHE3/61T application, or TPSMA39AHE3/61T 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 leads meeting J-STD-002 solderability.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating when transient voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier technology ensures stable VBR drift (αT = 0.091 %/°C) and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 µs surges up to 400 W.
Designed for high-reliability environments, the TPSMA39AHE3/61T supports operation from –65 °C to +185 °C junction temperature and meets MSL Level 1 (260 °C peak reflow). Its cathode-band polarity marking and DO-214AC footprint are standardized for automated placement and thermal management on PCBs with 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 / 39.0 / 41.0 V at 1 mA - defines precise activation threshold for overvoltage clamping |
| VWM | 33.3 V - maximum continuous operating voltage before leakage rises above 1.0 µA |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 400 W transient, limiting stress on downstream ICs |
| PPPM | 400 W (10/1000 µs waveform) - peak surge energy handling capacity under standard test conditions |
| TJ max. | +185 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Polarity & Package | Unidirectional, SMA (DO-214AC) - surface-mount compatible with standard reflow profiles and MSL Level 1 |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case with UL 94 V-0 flammability rating; matte tin-plated leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side of protected line; carries 40 A non-repetitive surge (IFSM) |
| Cathode | Current exit point during forward conduction; clamping reference | Marked with band; connected to higher-potential side; defines VBR and VC reference node |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design reduces VBR drift and improves long-term stability at TJ = 185 °C |
| Clamping performance | Low VC/VBR ratio (1.38) ensures tight voltage limiting without excessive overshoot |
| Surge robustness | 40 A IFSM (8.3 ms half-sine) supports repeated load-dump events in 12 V automotive systems |
| Manufacturing compliance | RoHS-compliant, halogen-free option available (HM3 suffix), JESD 201 Class 2 whisker tested |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ISO 7637-2 pulse 1/2a/5a transients in engine control units. IC Role / Device Role / Timing Role: Parallel-connected clamping diode that diverts surge current away from sensitive input pins during ESD or load dump. Use Value: Limits voltage to ≤53.9 V during 7.4 A transients, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding 24 V DC power inputs in PLC modules and motor drives against switching surges and lightning-induced spikes. IC Role / Device Role / Timing Role: Standoff voltage (33.3 V) allows normal operation while clamping >39 V transients within microseconds. Use Value: Withstands 400 W pulses without degradation, enabling reliable operation in harsh factory-floor environments. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters and USB PD power supplies exposed to mains-borne surges. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed across output capacitor to clamp flyback regulator overshoot. Use Value: 1.0 µA leakage at 33.3 V minimizes standby power loss; 185 °C rating supports compact, thermally constrained designs. | Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom interfaces. IC Role / Device Role / Timing Role: Unidirectional clamping on DC-biased signal lines (e.g., MDI-X), referenced to local ground. Use Value: Low capacitance (<50 pF typical at 0 V) avoids signal integrity degradation at 100 Mbps+ data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39A | Same SMA package, 39 V VBR, but rated for 400 W with 1.0 W steady-state dissipation; no AEC-Q101 qualification | Not qualified for automotive use; suitable for commercial/industrial only | Select SMAJ39A where AEC-Q101 is not required and cost sensitivity outweighs automotive validation |
| 1.5SMC39A | Larger SMC (DO-214AB) package, identical electrical specs, 1.5 kW PPPM, higher thermal mass | Requires larger PCB footprint; better for high-energy, low-duty-cycle surges | Choose 1.5SMC39A when system-level surge testing exceeds 400 W or board layout allows larger package |
Compared with SMAJ39A and 1.5SMC39A, the TPSMA39AHE3/61T uniquely combines AEC-Q101 qualification, 185 °C operation, and RoHS/halogen-free compliance in the compact SMA footprint - making it optimal for space-constrained, high-reliability automotive and industrial designs where qualification and thermal margin are critical.
Availability
TPSMA39AHE3/61T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, and consumer power adapter input applications requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for TPSMA39AHE3/61T 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for high-temperature, high-reliability surge protection in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the breakdown voltage tolerance of the TPSMA39AHE3/61T?
The TPSMA39AHE3/61T has a specified breakdown voltage (VBR) range of 37.1 V to 41.0 V at 1 mA test current, representing ±5% tolerance around the nominal 39 V rating. This tight tolerance ensures predictable clamping onset across production lots and temperature extremes up to 185 °C junction temperature, critical for consistent protection in safety-critical automotive systems.
Is the TPSMA39AHE3/61T suitable for bidirectional transient protection?
No, the TPSMA39AHE3/61T is unidirectional only, as confirmed in the Vishay datasheet. It protects against positive-going transients relative to its cathode terminal and must be oriented with cathode toward the higher-potential side of the protected line. For bidirectional protection, two TPSMA39AHE3/61T devices in series-opposing configuration or a dedicated bidirectional TVS (e.g., TPSMA39CA) would be required.
What is the maximum clamping voltage of the TPSMA39AHE3/61T under surge conditions?
The TPSMA39AHE3/61T exhibits a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during a 400 W transient event, ensuring downstream components remain within safe operating limits.
Does the TPSMA39AHE3/61T meet automotive reliability standards?
Yes, the TPSMA39AHE3/61T is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification validates its performance under rigorous automotive stress tests including temperature cycling, highly accelerated life testing (HALT), and humidity bias HTRB - confirming suitability for under-hood and chassis-mounted applications where reliability at 185 °C junction temperature is mandatory.
What is the thermal derating behavior of the TPSMA39AHE3/61T above 25 °C ambient?
The TPSMA39AHE3/61T follows a linear derating curve for peak pulse power (PPPM) above 25 °C ambient, as shown in Figure 2 of the Vishay datasheet. At 125 °C ambient, its 400 W rating is reduced to approximately 200 W; at 175 °C, it drops to ~80 W. Derating is based on junction temperature limits and requires proper PCB copper pad area (0.2" × 0.2") for thermal management.
TPSMA39AHE3/61T 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):
- 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)
TPSMA39AHE3/61T FAQ
1.How can I place an order for TPSMA39AHE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39AHE3/61T 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 TPSMA39AHE3/61T reliable?
The price and inventory of TPSMA39AHE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39AHE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA39AHE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39AHE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39AHE3/61T?
TPSMA39AHE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39AHE3/61T 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 TPSMA39AHE3/61T?
For technical support, including TPSMA39AHE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39AHE3/61T requirements.
6.How does Aetrix verify that TPSMA39AHE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA39AHE3/61T 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 TPSMA39AHE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA39AHE3/61T?
All TPSMA39AHE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39AHE3/61T, 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 TPSMA39AHE3/61T part is unused and in its original packaging.
Return procedure for TPSMA39AHE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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