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Vishay General Semiconductor - Diodes Division TPSMA18HE3/61T
- Part No.:
- TPSMA18HE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA18HE3/61T.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,349
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Product details
Overview
TPSMA18HE3/61T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 18 V breakdown voltage (VBR = 17.1–18.9 V), 400 W peak pulse power (10/1000 µs), 25.5 V clamping voltage at 15.9 A surge current, and 185 °C maximum junction temperature - deployed for ESD and lightning surge protection on automotive sensor signal lines and power rails.
For engineers reviewing the TPSMA18HE3/61T datasheet, TPSMA18HE3/61T pinout, TPSMA18HE3/61T application, or TPSMA18HE3/61T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C capability, 1.0 W steady-state power dissipation, and compatibility with reflow soldering per J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, leveraging passivated anisotropic rectifier technology to deliver fast response time (<1 ns) and low incremental surge resistance. Its unidirectional configuration enables protection of DC-biased lines without forward conduction during normal operation.
Designed for high-reliability environments, the TPSMA18HE3/61T meets AEC-Q101 stress test requirements and supports operation from –65 °C to +185 °C. It is qualified for automotive use via the HE3 suffix and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 V / 18.0 V / 18.9 V - defines precise voltage threshold at which device enters avalanche conduction under 1 mA test current |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA at 25 °C |
| VC @ IPPM | 25.5 V at 15.9 A - clamping voltage during 400 W 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capacity under standardized transient waveform |
| TJ max. | +185 °C - enables placement near high-temperature components (e.g., power MOSFETs, engine control units) |
| Polarity | Unidirectional - protects only against reverse-polarity transients; cathode marked by band |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm thermal pad footprint |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, cathode indicated by color band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE > VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±5 % over lifetime and 185 °C operation without degradation |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture-induced popcorn failure or delamination |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| 400 W peak pulse power (10/1000 µs) | Handles repetitive surges up to 0.01 % duty cycle in industrial motor drive I/O protection |
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 ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Clamping transient energy away from sensitive input pins of automotive-grade microcontrollers and interface ICs. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V systems) and IEC 61000-4-2 ±15 kV contact discharge. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Acting as primary front-end surge limiter on 24 V DC field wiring before optocoupler or Schmitt trigger input stages. Use Value: Prevents latch-up and permanent damage during 400 W, 10/1000 µs transients induced by relay coil de-energization. |
| Consumer Power Adapter Input | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression on 5–12 V DC outputs of wall adapters subjected to lightning-induced surges via shared AC mains. IC Role / Device Role / Timing Role: Fast-clamping element placed between output rail and ground, downstream of DC-DC converter. Use Value: Limits output voltage excursion to ≤25.5 V during 15.9 A surge, protecting USB-PD controllers and LDO regulators. | Use Scenario: Protecting Ethernet PHY interfaces and PoE injectors on telecom line cards from induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Unidirectional TVS placed across differential pairs or supply-to-ground to clamp common-mode transients. Use Value: Achieves <1 ns response with 25.5 V clamping, meeting GR-1089-CORE Level 3 surge immunity 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 |
|---|---|---|---|
| SMAJ18A | Same VBR range (17.1–18.9 V), identical SMA package, but not AEC-Q101 qualified; lower TJ max. (150 °C) | Not suitable for automotive under-hood use; acceptable for commercial-grade industrial or consumer power rails | Select SMAJ18A only if AEC-Q101 compliance and 185 °C operation are not required |
| TPSMA18AHM3/61T | Halogen-free variant with same electrical specs, AEC-Q101 qualification, and identical thermal performance | Required where RoHS + halogen-free compliance is mandated (e.g., EU automotive Tier 1 supply chains) | Choose TPSMA18AHM3/61T when material compliance exceeds standard RoHS requirements |
Compared with SMAJ18A and TPSMA18AHM3/61T, the TPSMA18HE3/61T uniquely combines AEC-Q101 qualification, 185 °C junction rating, and RoHS compliance - making it the preferred choice for automotive sensor nodes and high-temperature industrial control modules where long-term reliability under thermal stress is critical.
Availability
TPSMA18HE3/61T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line card surge suppression requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for TPSMA18HE3/61T 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, thermal robustness, and automotive-grade qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature, high-reliability protection in automotive and industrial environments where sustained 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the TPSMA18HE3/61T at its rated peak pulse current?
The TPSMA18HE3/61T has a maximum clamping voltage (VC) of 25.5 V at its peak pulse current (IPPM) of 15.9 A, measured under the standard 10/1000 µs waveform. This value ensures downstream circuitry remains within safe operating limits during surge events. The TPSMA18HE3/61T achieves this clamping performance while maintaining low incremental surge resistance and fast response time.
Is the TPSMA18HE3/61T qualified for automotive applications?
Yes, the TPSMA18HE3/61T is AEC-Q101 qualified, as confirmed by the HE3 suffix in its ordering code and documentation in Vishay's 88405 datasheet. It supports junction temperatures up to +185 °C and passes all required stress tests for automotive use, including high-temperature reverse bias and temperature cycling. The TPSMA18HE3/61T is intended for under-hood and body-control module applications where reliability under thermal and electrical stress is critical.
What does the "HE3" suffix mean in TPSMA18HE3/61T?
The "HE3" suffix in TPSMA18HE3/61T indicates RoHS-compliant construction and AEC-Q101 qualification per Vishay's ordering nomenclature. It distinguishes this variant from non-automotive versions (e.g., base TPSMA18A) and confirms compliance with JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements. The TPSMA18HE3/61T is fully traceable and intended for high-reliability automotive supply chains.
What is the maximum steady-state power dissipation of the TPSMA18HE3/61T?
The TPSMA18HE3/61T has a maximum steady-state power dissipation (PD) of 1.0 W at ambient temperature (TA) = 25 °C, derating linearly above that temperature per the datasheet's thermal curve. This rating governs continuous reverse leakage power under normal operating conditions and must be considered alongside PCB copper area and ambient airflow. The TPSMA18HE3/61T maintains this rating while supporting 400 W transient pulses.
How is polarity identified on the TPSMA18HE3/61T package?
Polarity on the TPSMA18HE3/61T is indicated by a color band at the cathode end of the SMA (DO-214AC) package. During circuit layout, the banded end must be connected to the line being protected, while the anode is tied to ground or reference potential. This unidirectional configuration ensures the TPSMA18HE3/61T conducts only during reverse overvoltage events, avoiding forward conduction in normal DC-biased operation.
TPSMA18HE3/61T 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):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 15.1A
- 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)
TPSMA18HE3/61T FAQ
1.How can I place an order for TPSMA18HE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA18HE3/61T 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 TPSMA18HE3/61T reliable?
The price and inventory of TPSMA18HE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA18HE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA18HE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA18HE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA18HE3/61T?
TPSMA18HE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA18HE3/61T 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 TPSMA18HE3/61T?
For technical support, including TPSMA18HE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA18HE3/61T requirements.
6.How does Aetrix verify that TPSMA18HE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA18HE3/61T 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 TPSMA18HE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA18HE3/61T?
All TPSMA18HE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA18HE3/61T, 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 TPSMA18HE3/61T part is unused and in its original packaging.
Return procedure for TPSMA18HE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA18HE3/61T Tags
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