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Vishay General Semiconductor - Diodes Division TPSMA39HE3/5AT
- Part No.:
- TPSMA39HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39HE3/5AT.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,051
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Product details
Overview
TPSMA39HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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 (VC) at 7.4 A peak pulse current, and 400 W peak pulse power (10/1000 µs). It operates up to +185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the TPSMA39HE3/5AT datasheet, TPSMA39HE3/5AT pinout, TPSMA39HE3/5AT application, or TPSMA39HE3/5AT equivalent, key selection criteria include unidirectional polarity, 33.3 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, 3.5 V max forward voltage at 25 A, and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for high reliability under thermal stress. Its 185 °C maximum junction temperature and AEC-Q101 qualification support operation in under-hood automotive environments and industrial control systems exposed to wide ambient swings.
The device delivers precise clamping performance with 0.091 %/°C temperature coefficient of VBR, enabling stable overvoltage protection across temperature. Its low incremental surge resistance and fast response time ensure effective suppression of transients from inductive switching and lightning-induced surges on signal lines and power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 / 39.0 / 41.0 V at 1 mA - defines reliable conduction onset under surge conditions |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs waveform) - peak surge energy handling capability per single event |
| TJ max. | +185 °C - enables use in high-temperature automotive and industrial enclosures without derating |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band marks polarity |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 0.208" x 0.157" footprint and MSL Level 1 rating |
Pinout & Package
TPSMA39HE3/5AT is housed in an SMA (DO-214AC) surface-mount package with two terminals: anode and cathode. The cathode is marked by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when VBR exceeded |
| Anode | Reference/ground return path | Typically tied to system ground; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR and low leakage over 1000+ thermal cycles at 185 °C |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST testing |
| MSL Level 1 (260 °C peak) | Allows standard reflow assembly without pre-baking or special handling |
| 0.091 %/°C VBR tempco | Ensures predictable clamping voltage shift across -65 °C to +185 °C operating range |
| Low 1.0 µA IR at VWM | Minimizes standby power loss and avoids false triggering in low-power sensor interfaces |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp spikes above 33.3 V. Use Value: Withstands 400 W surges and maintains clamping at ≤53.9 V, preventing damage to MCU power inputs and CAN transceivers. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS connected across differential signal pair (e.g., 4–20 mA loop) to shunt ESD and switching noise. Use Value: 1.0 µA leakage at 33.3 V ensures minimal offset error; fast response preserves signal integrity during 8 kV contact ESD events. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered network switches against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary TVS on DC input rail upstream of DC/DC converter, configured unidirectionally. Use Value: 185 °C rating allows placement near heat-generating magnetics; 53.9 V clamping prevents overvoltage at converter enable pin. | Use Scenario: Adding secondary-level surge protection on VBUS line of USB-C ports in portable monitors. IC Role / Device Role / Timing Role: TVS placed between VBUS and GND, sized to handle IEC 61000-4-5 10/1000 µs surges. Use Value: SMA package fits tight board space; 7.4 A IPPM rating meets 10 A surge requirement with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Higher VWM (30.8 V), lower VC (58.1 V), same PPPM (400 W), SMB package (larger footprint) | Less suitable for 33.3 V nominal rails due to tighter VWM/VBR margin; requires PCB area increase | Select if higher surge current margin needed or existing SMB layout reuse is prioritized |
| SMCJ36A | Same VBR range (36.0–37.8 V), higher PPPM (1500 W), SMC package (3× larger than SMA) | Over-specified for 400 W needs; incompatible with space-constrained layouts requiring SMA | Choose only when system-level surge requirements exceed 400 W or higher IPPM (23.5 A) is mandated |
Compared with SMBJ36A and SMCJ36A, the TPSMA39HE3/5AT provides optimal balance of 33.3 V working voltage margin, compact SMA footprint, and AEC-Q101 qualification-making it preferred for automotive and space-limited industrial designs where 400 W surge rating suffices.
Availability
TPSMA39HE3/5AT is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface clamping, and telecom DC input surge suppression requiring stable component supply, AEC-Q101 compliance, and high-temperature operational assurance.
Supply support for TPSMA39HE3/5AT 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, thermal robustness, and automotive qualification.
The TPSMA39HE3/5AT belongs to Vishay's PAR® series of high-temperature TVS diodes, engineered specifically for harsh-environment overvoltage protection in automotive, industrial, and telecom infrastructure where sustained 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance for TPSMA39HE3/5AT?
The TPSMA39HE3/5AT has a specified breakdown voltage (VBR) range of 37.1 V (min) to 41.0 V (max) at 1.0 mA test current, with a typical value of 39.0 V. This ±5.2% tolerance ensures consistent clamping behavior across production lots while maintaining compatibility with 33.3 V stand-off voltage (VWM) requirements in 36 V nominal systems. The device meets ANSI/IEEE C62.35 standards for transient suppressor characterization.
Is TPSMA39HE3/5AT RoHS-compliant and halogen-free?
Yes, the TPSMA39HE3/5AT carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. However, it is not halogen-free; halogen-free versions use the HM3 suffix (e.g., TPSMA39AHM3/5AT). The HE3 variant uses standard molding compound meeting UL 94 V-0 flammability rating and matte tin-plated leads compliant with J-STD-002 solderability requirements.
What is the maximum clamping voltage of TPSMA39HE3/5AT under surge conditions?
The maximum clamping voltage (VC) of TPSMA39HE3/5AT is 53.9 V at 7.4 A peak pulse current (IPPM), measured using the standardized 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by downstream circuitry during a 400 W transient event and is critical for ensuring protected ICs remain within their absolute maximum ratings.
Can TPSMA39HE3/5AT be used in bidirectional configurations?
No, TPSMA39HE3/5AT is unidirectional only, as confirmed in the Vishay datasheet. It conducts surge current from cathode to anode only and must be oriented with the banded end toward the protected line. For bidirectional protection, a separate device such as the TPSMA39CA (center-tapped, bidirectional variant) or dual-series configuration would be required-TPSMA39HE3/5AT itself does not support symmetrical clamping.
What is the thermal derating behavior of TPSMA39HE3/5AT above 25 °C ambient?
TPSMA39HE3/5AT follows standard thermal derating per Figure 2 in its datasheet: peak pulse power (PPPM) decreases linearly from 400 W at 25 °C to zero at 185 °C junction temperature. At 125 °C ambient (assuming typical θJA), usable PPPM drops to approximately 240 W. Derating is based on junction temperature, not ambient alone, so PCB copper area and airflow significantly impact real-world performance.
TPSMA39HE3/5AT 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)
TPSMA39HE3/5AT FAQ
1.How can I place an order for TPSMA39HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39HE3/5AT 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 TPSMA39HE3/5AT reliable?
The price and inventory of TPSMA39HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA39HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39HE3/5AT?
TPSMA39HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39HE3/5AT 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 TPSMA39HE3/5AT?
For technical support, including TPSMA39HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39HE3/5AT requirements.
6.How does Aetrix verify that TPSMA39HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA39HE3/5AT 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 TPSMA39HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA39HE3/5AT?
All TPSMA39HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39HE3/5AT, 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 TPSMA39HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA39HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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