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Vishay General Semiconductor - Diodes Division TPSMA43HE3/5AT
- Part No.:
- TPSMA43HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA43HE3/5AT.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,574
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Product details
Overview
TPSMA43HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against 10/1000 μs surge transients up to 400 W peak pulse power, with 43 V breakdown voltage (VBR), 36.8 V stand-off voltage (VWM), and 59.3 V clamping voltage (VC) at 6.7 A peak pulse current - used in automotive sensor signal lines and industrial I/O protection.
For engineers reviewing the TPSMA43HE3/5AT datasheet, TPSMA43HE3/5AT pinout, TPSMA43HE3/5AT application, or TPSMA43HE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C maximum junction temperature, low incremental surge resistance, and compatibility with high-reliability PCB layouts requiring MSL Level 1 reflow.
Technical Context
The TPSMA43HE3/5AT operates as a silicon avalanche diode with passivated anisotropic rectifier technology, delivering precise clamping response under fast-rising transients (typical response time < 1 ns). Its thermal design supports continuous operation up to TJ = 185 °C, enabling deployment in under-hood automotive environments and high-temperature industrial control modules.
It is rated for 400 W peak pulse power per 10/1000 μs waveform at 0.01 % duty cycle, with 1.0 W steady-state power dissipation and 40 A non-repetitive forward surge current (8.3 ms half-sine). The device exhibits a +0.092 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 40.9 V / 43.0 V / 45.2 V - defines minimum voltage at which avalanche conduction begins reliably at 1 mA test current |
| VWM | 36.8 V - maximum continuous reverse working voltage before leakage exceeds 1 μA, sets system operating margin |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage during 10/1000 μs surge, determines protected circuit's maximum transient exposure |
| PPPM | 400 W - peak pulse power handling capability under standardized surge waveform, critical for lightning/inductive switch immunity |
| TJ max. | 185 °C - enables use in high-ambient environments without derating, supporting AEC-Q101 automotive qualification |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes terminal orientation on PCB |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to protected line (e.g., signal or power rail); must be routed with low-inductance trace for effective surge shunting |
| Cathode | Current exit point during clamping; referenced to ground or return path | Typically tied to system ground plane; polarity marking ensures correct orientation to avoid open-circuit failure mode |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces surface leakage and improves long-term reliability under high humidity and bias stress conditions |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade production use including temperature cycling, HTRB, and ESD robustness testing |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture-induced delamination or popcorn effect |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for downstream ICs |
| 10/1000 μs waveform compliance | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive applications |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground, absorbing energy before it reaches the transceiver input stage. Use Value: Prevents latch-up or permanent damage to 5 V or 3.3 V interface ICs by limiting transient voltage to ≤59.3 V while maintaining 36.8 V DC operating margin. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation systems. IC Role / Device Role / Timing Role: Front-end transient suppression on 24 V DC input channels, coordinated with series impedance and filtering capacitors. Use Value: Enables reliable operation under repetitive 400 W surges without parameter shift, supported by 185 °C junction rating for enclosed cabinet environments. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from lightning-induced surges on outdoor-facing ports in base station equipment. IC Role / Device Role / Timing Role: Primary-level surge arrestor mounted at connector entry point, preceding secondary TVS arrays and common-mode chokes. Use Value: Withstands 6.7 A peak current at 59.3 V clamping, reducing stress on downstream polymer PTCs and secondary protection devices. |
Use Scenario: Adding robust ESD immunity to USB-C and barrel-jack inputs in AC/DC adapters rated for 100–240 VAC input. IC Role / Device Role / Timing Role: Secondary-side transient suppressor on 5 V or 12 V output rails, guarding against user-handling ESD and cable coupling events. Use Value: Delivers sub-1 ns response and <1 μA leakage at 36.8 V, preserving standby efficiency while meeting IEC 61000-4-2 ±15 kV contact discharge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Same VBR (40.9–45.2 V), but SMB package (DO-214AA); 600 W PPPM, higher IPPM (10.3 A), larger footprint (0.236" × 0.157") | Better suited for higher-energy surges; requires PCB layout change due to larger pad area and different thermal mass | Select when surge energy exceeds 400 W or when board space allows larger package for improved thermal dissipation |
| SMCJ43A | Same VBR range, SMC (DO-214AB) package; 1500 W PPPM, 24.5 A IPPM, 64.5 V VC; 2× larger footprint than SMA | Targeted at primary-level protection in power supplies and motor drives where higher clamping voltage is acceptable | Choose for front-end AC/DC or DC/DC converter input protection where system-level coordination with downstream TVS is required |
Compared with SMBJ43A and SMCJ43A, the TPSMA43HE3/5AT offers optimal balance of compact size, AEC-Q101 qualification, and 400 W surge capability - making it preferred for space-constrained, high-reliability signal-line protection where strict layout control and automotive compliance are mandatory.
Availability
TPSMA43HE3/5AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, consistent AEC-Q101 qualification, and RoHS-compliant manufacturing traceability.
Supply support for TPSMA43HE3/5AT 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 performance, and automotive-grade validation.
The TPSMA43HE3/5AT belongs to Vishay's PAR® (Protected Avalanche Rectifier) TVS family, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments where sustained 185 °C operation and AEC-Q101 compliance are essential.
FAQ
What is the breakdown voltage tolerance for TPSMA43HE3/5AT?
The TPSMA43HE3/5AT has a specified breakdown voltage (VBR) range of 40.9 V (minimum) to 45.2 V (maximum) at 1.0 mA test current, with 43.0 V nominal. This ±5 % tolerance ensures predictable clamping onset across production lots and temperature extremes, supporting robust design margins in automotive and industrial applications where precise overvoltage thresholds are critical. The TPSMA43HE3/5AT maintains this specification under full AEC-Q101 qualification testing.
Is TPSMA43HE3/5AT suitable for bidirectional transient protection?
No, the TPSMA43HE3/5AT is unidirectional only, as confirmed by its datasheet polarity designation and electrical characteristics table. It clamps positive transients relative to cathode (ground), but does not suppress negative excursions. For bidirectional protection, a pair of TPSMA43HE3/5AT devices in series-opposing configuration or a dedicated bidirectional TVS such as SMBJ43CA would be required. The TPSMA43HE3/5AT datasheet explicitly states "Available in uni-directional polarity only."
What does the 'HE3' suffix indicate in TPSMA43HE3/5AT?
The 'HE3' suffix in TPSMA43HE3/5AT denotes RoHS-compliant construction and AEC-Q101 qualification per Vishay's ordering nomenclature. It confirms that the device meets automotive reliability standards including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock tests. The '5AT' denotes tape-and-reel packaging in 7" diameter reels with 1800 units per reel - a standard logistics code verified in Vishay's ordering information table.
How does the clamping voltage of TPSMA43HE3/5AT compare to its breakdown voltage?
The TPSMA43HE3/5AT clamps at 59.3 V when subjected to its rated 6.7 A peak pulse current (10/1000 μs waveform), which is approximately 38 % above its nominal 43.0 V breakdown voltage. This VC/VBR ratio reflects low incremental surge resistance and efficient avalanche conduction - critical for protecting downstream 48 V tolerant or 36 V-rated circuits. The TPSMA43HE3/5AT achieves this performance while maintaining 1.0 μA leakage at 36.8 V stand-off voltage.
Can TPSMA43HE3/5AT be used in lead-free reflow processes?
Yes, the TPSMA43HE3/5AT is rated for MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, making it fully compatible with standard lead-free soldering profiles. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, and the HE3 suffix confirms qualification for automotive production environments. No pre-baking is required prior to reflow, simplifying manufacturing for TPSMA43HE3/5AT integration.
TPSMA43HE3/5AT 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- 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)
TPSMA43HE3/5AT FAQ
1.How can I place an order for TPSMA43HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA43HE3/5AT 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 TPSMA43HE3/5AT reliable?
The price and inventory of TPSMA43HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA43HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA43HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA43HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA43HE3/5AT?
TPSMA43HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA43HE3/5AT 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 TPSMA43HE3/5AT?
For technical support, including TPSMA43HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA43HE3/5AT requirements.
6.How does Aetrix verify that TPSMA43HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA43HE3/5AT 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 TPSMA43HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA43HE3/5AT?
All TPSMA43HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA43HE3/5AT, 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 TPSMA43HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA43HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA43HE3/5AT Tags
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