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Vishay General Semiconductor - Diodes Division TPSMA39HE3/61T
- Part No.:
- TPSMA39HE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39HE3/61T.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,311
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Product details
Overview
TPSMA39HE3/61T 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 39 V breakdown voltage (VBR = 37.1–41.0 V), 53.9 V maximum clamping voltage 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 TPSMA39HE3/61T datasheet, TPSMA39HE3/61T pinout, TPSMA39HE3/61T application, or TPSMA39HE3/61T equivalent, key selection criteria include unidirectional polarity, 33.3 V stand-off voltage (VWM), low incremental surge resistance, fast response time, and compliance with MSL Level 1 reflow requirements.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, activating when reverse voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier technology ensures stable leakage performance up to 150 °C and enables reliable operation under repetitive surge conditions with 0.01 % duty cycle.
The device is optimized for high-temperature environments: it sustains continuous operation from –65 °C to +185 °C, exhibits a positive temperature coefficient of VBR (+0.091 %/°C), and maintains clamping integrity during 8.3 ms half-sine surges up to 40 A IFSM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 / 39.0 / 41.0 V - defines precise activation threshold for transient clamping |
| VWM | 33.3 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 53.9 V - clamped voltage seen by protected circuit during 7.4 A 10/1000 μs surge |
| PPPM | 400 W - peak surge power handling capability under standardized waveform |
| IFSM | 40 A - non-repetitive forward surge current rating for inductive switching events |
| TJ max | +185 °C - enables use in under-hood automotive and high-ambient industrial environments |
| MSL Level | Level 1 - supports standard SMT reflow without moisture sensitivity concerns |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode indicated by molded band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), with 5.0 mm × 5.0 mm copper pad layout recommended for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line; conducts during overvoltage to shunt energy to ground |
| Anode | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Reduces long-term leakage drift and improves stability under thermal cycling and humidity |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD testing per stress test plan |
| 400 W peak pulse power | Handles common ISO 7637-2 and IEC 61000-4-5 surge waveforms without degradation |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to downstream ICs while maintaining margin above VWM |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp transients before they reach sensitive input stages. Use Value: Maintains signal integrity with 33.3 V stand-off and 53.9 V clamping, preventing latch-up or damage to 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding 24 V DC input rails in PLC I/O modules against lightning-induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor absorbing 400 W pulses without failure across wide temperature range. Use Value: Enables robust design with 185 °C junction rating and AEC-Q101 qualification, supporting extended field life in harsh enclosures. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side surge suppression in AC/DC adapters for smart home devices exposed to mains-borne transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V or 19 V output rail to prevent overvoltage propagation to USB-PD controllers or microcontrollers. Use Value: Low leakage (<1 μA at VWM) avoids standby power penalty; MSL Level 1 simplifies manufacturing integration. | Use Scenario: Protecting Ethernet PHY interfaces and PoE injectors from ESD and induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp on data pair lines referenced to chassis ground. Use Value: 7.4 A IPPM and 53.9 V VC ensure compliance with IEC 61000-4-2 (±8 kV contact) and IEC 61000-4-5 (1 kV line-earth). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ39A | Same VBR range (37.1–41.0 V), but rated for 400 W with 1.0 W steady-state power; no AEC-Q101 qualification | Not qualified for automotive use; suitable for commercial/industrial only | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMCJ39A | Higher PPPM (1500 W), same VBR, larger SMC (DO-214AB) package; TJ max = 175 °C | Requires larger PCB footprint; better for higher-energy threats like lightning | Choose when surge energy exceeds 400 W and board space allows larger package |
Compared with SMAJ39A and SMCJ39A, the TPSMA39HE3/61T uniquely combines AEC-Q101 qualification, 185 °C junction rating, and compact SMA footprint - making it optimal for space-constrained automotive and high-reliability industrial designs where qualification and thermal margin are critical.
Availability
TPSMA39HE3/61T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, and telecom line interface protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPSMA39HE3/61T 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, precision, and high-temperature performance.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-stability clamping in automotive, industrial, and telecom systems subject to severe electrical stress and thermal cycling.
FAQ
What is the breakdown voltage tolerance for TPSMA39HE3/61T?
The TPSMA39HE3/61T has a specified breakdown voltage range of 37.1 V (minimum) to 41.0 V (maximum) at 1.0 mA test current, with a nominal value of 39.0 V. This ±5% tolerance ensures predictable clamping onset across production lots and temperature extremes, and is verified per ANSI/IEEE C62.35 standards. The TPSMA39HE3/61T maintains this specification under derated conditions up to 150 °C junction temperature.
Is TPSMA39HE3/61T suitable for automotive applications?
Yes, the TPSMA39HE3/61T is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS-compliance and automotive-grade reliability. It supports operating junction temperatures up to +185 °C and passes stress tests including high-temperature operating life (HTOL), temperature cycling, and ESD per JESD22-A114. The TPSMA39HE3/61T is explicitly intended for use in engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of TPSMA39HE3/61T at its rated peak pulse current?
The TPSMA39HE3/61T exhibits a maximum clamping voltage (VC) of 53.9 V at its rated peak pulse current (IPPM) of 7.4 A, measured using the standardized 10/1000 μs double-exponential waveform. This clamping level provides safe margin below typical 60 V absolute maximum ratings of automotive microcontrollers and transceivers, ensuring robust protection without overstressing downstream components.
Does TPSMA39HE3/61T have unidirectional or bidirectional polarity?
The TPSMA39HE3/61T is a unidirectional TVS diode, meaning it functions as a Zener-like clamp only in reverse bias and conducts forward current like a standard diode. Polarity is marked by a cathode band; the device must be oriented with cathode toward the protected line and anode toward ground. Bidirectional variants (e.g., TPSMA39CA) are separate part numbers and not interchangeable with the TPSMA39HE3/61T.
What is the thermal resistance (RθJA) of TPSMA39HE3/61T?
The datasheet does not specify RθJA for TPSMA39HE3/61T as a standalone parameter; instead, thermal performance is defined via derating curves and mounting recommendations. With 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, the device achieves sufficient heat dissipation for its 1.0 W steady-state power rating and 400 W transient capability. The TPSMA39HE3/61T relies on PCB copper area rather than package-level RθJA values for thermal management.
TPSMA39HE3/61T 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):
- 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)
TPSMA39HE3/61T FAQ
1.How can I place an order for TPSMA39HE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39HE3/61T 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 TPSMA39HE3/61T reliable?
The price and inventory of TPSMA39HE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39HE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA39HE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39HE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39HE3/61T?
TPSMA39HE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39HE3/61T 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 TPSMA39HE3/61T?
For technical support, including TPSMA39HE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39HE3/61T requirements.
6.How does Aetrix verify that TPSMA39HE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA39HE3/61T 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 TPSMA39HE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA39HE3/61T?
All TPSMA39HE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39HE3/61T, 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 TPSMA39HE3/61T part is unused and in its original packaging.
Return procedure for TPSMA39HE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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