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Vishay General Semiconductor - Diodes Division TPSMA18AHE3/61T
- Part No.:
- TPSMA18AHE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA18AHE3/61T.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,774
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Product details
Overview
TPSMA18AHE3/61T 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 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 25.5 V maximum clamping voltage (VC) at 15.9 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive power rail protection.
For engineers reviewing the TPSMA18AHE3/61T datasheet, TPSMA18AHE3/61T pinout, TPSMA18AHE3/61T application, or TPSMA18AHE3/61T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C capability, low clamping ratio (VC/VBR ≈ 1.42), and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and fast response to ESD and lightning-induced surges. Its unidirectional architecture provides forward conduction only during overvoltage events, enabling robust protection of DC power rails and low-side signal paths without interfering with normal operation.
Rated for 400 W peak pulse power under 10/1000 µs waveform with 0.01 % duty cycle, it delivers consistent clamping performance across -65 °C to +185 °C operating range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Nominal) | 18.0 V - precise breakdown threshold triggering clamping before downstream IC damage |
| VWM | 15.3 V - maximum continuous reverse voltage without leakage exceeding 1 μA at 25 °C |
| VC @ IPPM | 25.5 V - clamped voltage seen by protected circuit during 15.9 A surge, limiting stress |
| PPPM | 400 W - energy-handling capacity for transient suppression per 10/1000 µs waveform |
| TJ max. | +185 °C - enables use in under-hood automotive environments and high-power industrial enclosures |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band marks polarity |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.28 mm length, compatible with automated placement |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode indicated by color band. Terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VIN exceeds VBR |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return plane; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR drift < ±5 % over lifetime at 150 °C |
| High-temperature operation | Rated for continuous operation up to +185 °C junction temperature, supporting AEC-Q101 automotive compliance |
| Clamping efficiency | Clamping ratio VC/VBR = 1.42 enables tighter margin between VWM and VC, reducing risk of false triggering |
| Surge response speed | Sub-nanosecond response time limits voltage overshoot during fast transients like ESD and inductive switching |
| Reliability validation | Meets JESD201 Class 2 whisker test and MSL Level 1, ensuring robustness in high-volume reflow assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 15.3 V. Use Value: Withstands 400 W pulses and operates reliably at +185 °C, eliminating thermal derating in engine compartment designs. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at sensor connector to absorb induced lightning surges on 4–20 mA loop wiring. Use Value: Low 25.5 V clamping voltage prevents damage to precision op-amps and ADC front-ends while maintaining signal integrity. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters handling 20 V output rails. IC Role / Device Role / Timing Role: Standoff-rated TVS on +20 V output line to suppress coupling from primary-side MOSFET switching noise. Use Value: 15.3 V VWM allows safe operation near 20 V nominal, while 25.5 V VC ensures downstream LDOs remain within absolute max ratings. | Use Scenario: Surge protection on -48 V DC telecom power feeds entering base station cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to chassis ground, absorbing positive transients on negative supply rail. Use Value: AEC-Q101 qualification and 185 °C rating support long-term deployment in outdoor telecom enclosures with wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same VBR (18 V), but SMB package (DO-214AA); 600 W PPPM; higher thermal resistance (RθJA ≈ 70 °C/W vs. SMA's ~85 °C/W) | Higher power handling suits larger PCB areas; less suitable for space-constrained automotive modules | Select SMBJ18A only if board layout permits larger footprint and higher surge energy is expected |
| 1.5SMC18A | Same VBR, but SMC (DO-214AB) package; 1500 W PPPM; significantly larger size and higher cost | Used where MIL-STD-461 or IEC 61000-4-5 Level 4 compliance requires >1 kW surge capability | Choose 1.5SMC18A only when TPSMA18AHE3/61T's 400 W rating is insufficient for system-level test requirements |
Compared with SMBJ18A and 1.5SMC18A, the TPSMA18AHE3/61T offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capability - making it preferred for space-limited, high-temperature automotive and industrial control applications where full 600–1500 W rating is unnecessary.
Availability
TPSMA18AHE3/61T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface circuits, and telecom DC feed protection requiring stable component supply, AEC-Q101 qualification, and high-temperature reliability.
Supply support for TPSMA18AHE3/61T 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, high-temperature performance, and automotive-grade qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-reliability protection in automotive, industrial, and telecom systems exposed to harsh electrical environments.
FAQ
What is the exact breakdown voltage tolerance for TPSMA18AHE3/61T?
The TPSMA18AHE3/61T has a specified breakdown voltage (VBR) range of 17.1 V (min) to 18.9 V (max) at 1.0 mA test current, with 18.0 V as the nominal value. This ±5 % tolerance is confirmed in the Electrical Characteristics table of Vishay document 88405 and applies directly to the TPSMA18AHE3/61T variant.
Is TPSMA18AHE3/61T AEC-Q101 qualified?
Yes, TPSMA18AHE3/61T is AEC-Q101 qualified. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, as explicitly stated in the Mechanical Data section of Vishay document 88405. This qualification covers temperature cycling, humidity testing, and mechanical shock per AEC-Q101 standards.
What is the maximum clamping voltage of TPSMA18AHE3/61T and under what conditions?
The TPSMA18AHE3/61T has a maximum clamping voltage (VC) of 25.5 V at 15.9 A peak pulse current (IPPM), measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and is listed in the Electrical Characteristics table for the TPSMA18A device.
Does TPSMA18AHE3/61T support bidirectional transient suppression?
No, TPSMA18AHE3/61T is unidirectional only. The datasheet explicitly states "Available in uni-directional polarity only", and its electrical characteristics (e.g., no reverse standoff specification for negative transients) confirm it is designed solely for positive-going surge suppression. For bidirectional protection, a separate device such as TPSMA18CA would be required.
What is the thermal resistance (RθJA) of TPSMA18AHE3/61T in standard mounting conditions?
The typical junction-to-ambient thermal resistance (RθJA) for TPSMA18AHE3/61T mounted on a PCB with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal is 85 °C/W, as derived from Vishay's derating curves (Fig. 2) and package thermal modeling for SMA (DO-214AC). This value assumes FR-4 board with 1 oz copper.
TPSMA18AHE3/61T 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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 15.9A
- 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)
TPSMA18AHE3/61T FAQ
1.How can I place an order for TPSMA18AHE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA18AHE3/61T 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 TPSMA18AHE3/61T reliable?
The price and inventory of TPSMA18AHE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA18AHE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA18AHE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA18AHE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA18AHE3/61T?
TPSMA18AHE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA18AHE3/61T 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 TPSMA18AHE3/61T?
For technical support, including TPSMA18AHE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA18AHE3/61T requirements.
6.How does Aetrix verify that TPSMA18AHE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA18AHE3/61T 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 TPSMA18AHE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA18AHE3/61T?
All TPSMA18AHE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA18AHE3/61T, 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 TPSMA18AHE3/61T part is unused and in its original packaging.
Return procedure for TPSMA18AHE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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