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Vishay General Semiconductor - Diodes Division TPSMA20HE3/61T
- Part No.:
- TPSMA20HE3/61T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA20HE3/61T.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,065
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Product details
Overview
TPSMA20HE3/61T 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 20 V breakdown voltage (VBR = 19.0–21.0 V at 1 mA), 400 W peak pulse power (10/1000 µs), 14.4 V maximum clamping voltage at 14.4 A peak pulse current, and 185 °C maximum junction temperature - enabling robust protection in automotive and industrial power rails.
For engineers reviewing the TPSMA20HE3/61T datasheet, TPSMA20HE3/61T pinout, TPSMA20HE3/61T application, or TPSMA20HE3/61T equivalent, key selection criteria include unidirectional polarity, 17.1 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, AEC-Q101 qualification, and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, triggering into avalanche conduction when transient voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier structure ensures stable performance up to TJ = 185 °C and meets MSL Level 1 reflow requirements (260 °C peak).
The device delivers 400 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01 % duty cycle, and exhibits fast response time (<1 ns) and low incremental surge resistance - critical for suppressing ESD, lightning-induced surges, and inductive switching spikes in DC power distribution networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V at 1 mA - defines precise avalanche initiation point for predictable clamping onset |
| VWM | 17.1 V - maximum continuous working voltage before leakage rises significantly |
| VC @ IPPM | 27.7 V at 14.4 A - clamped voltage during 400 W transient, limiting stress on downstream ICs |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity for repetitive transient suppression |
| TJ max. | 185 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm thermal pad layout |
Pinout & Package
SMA (DO-214AC) package with axial lead configuration: molded plastic body, matte tin-plated terminals, cathode indicated by color band. Designed for soldering per J-STD-002 and JESD 22-B102, qualified to MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche diode | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Cathode of internal avalanche diode | Typically tied to system ground or lower-potential rail to complete clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable 185 °C operation and long-term reliability under thermal cycling |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive applications including engine control units and body electronics |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3/4 surge immunity without derating in standard layouts |
| Low 1.0 µA reverse leakage at VWM | Minimizes standby power loss in battery-powered and always-on systems |
| Fast response time & low dynamic impedance | Clamps transients within nanoseconds while maintaining low clamping voltage under high di/dt |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 17.1 V. Use Value: Limits voltage seen by downstream PMICs and microcontrollers to ≤27.7 V during 400 W transients, preventing latch-up or damage. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted across differential signal pair or single-ended output to suppress ESD and cable discharge events. Use Value: Maintains signal integrity with <1 µA leakage at 17.1 V, avoiding offset errors while responding in <1 ns to ±8 kV HBM ESD. |
| Telecom DC Power Input Protection | Consumer Device USB Power Line Protection |
Use Scenario: Securing 24 V/48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC-DC converters. Use Value: Withstands repetitive 10/1000 µs surges up to 400 W and maintains clamping below 28 V - preserving converter MOSFETs and gate drivers. | Use Scenario: Adding secondary overvoltage protection on USB-C VBUS lines in portable monitors or docking stations. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and GND to absorb hot-swap and adapter fault transients. Use Value: 17.1 V VWM avoids interference with 5 V/9 V/15 V/20 V PD profiles while clamping faults to 27.7 V - protecting USB PD controllers and port switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VBR range (19.0–21.0 V), but rated for 400 W at 1.5 kW peak pulse power; no AEC-Q101 qualification | Not validated for automotive use; suitable for commercial/industrial power supplies only | Select if AEC-Q101 is not required and higher surge margin is needed |
| 1.5SMC20A | Larger SMC (DO-214AB) package; same electrical specs but 1.5 kW peak pulse rating and higher thermal mass | Requires larger PCB footprint; better suited for high-energy surge zones like AC/DC front ends | Select when board space allows and higher IPPM (23.5 A) and thermal endurance are prioritized |
Compared with SMAJ20A and 1.5SMC20A, TPSMA20HE3/61T offers AEC-Q101 qualification and optimized thermal performance in the compact SMA footprint - making it the preferred choice for space-constrained automotive and industrial modules where reliability under thermal stress is critical.
Availability
TPSMA20HE3/61T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across production lifecycles.
Supply support for TPSMA20HE3/61T 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 high-reliability and automotive-grade components.
The TPSMA series is part of Vishay's PAR® transient voltage suppressor family, engineered specifically for high-temperature stability and AEC-Q101 compliance in demanding automotive and industrial power protection applications.
FAQ
What is the breakdown voltage tolerance of TPSMA20HE3/61T?
The TPSMA20HE3/61T has a specified breakdown voltage range of 19.0 V to 21.0 V at 1 mA test current, per the Vishay datasheet (Document Number: 88405). This ±5 % tolerance ensures consistent clamping behavior across production lots and supports reliable design margining for 12 V and 24 V systems. The nominal VBR is 20.0 V, and the parameter is measured after 300 µs square-wave pulse application.
Is TPSMA20HE3/61T suitable for automotive applications?
Yes, TPSMA20HE3/61T is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS-compliance and automotive qualification. It supports operating junction temperatures up to +185 °C and meets MSL Level 1 reflow standards - making it suitable for under-hood ECUs, body control modules, and ADAS power supplies where thermal and reliability demands are stringent. The TPSMA20HE3/61T is explicitly listed in Vishay's automotive ordering code table.
What is the maximum clamping voltage of TPSMA20HE3/61T under surge conditions?
The TPSMA20HE3/61T has a maximum clamping voltage (VC) of 27.7 V at 14.4 A peak pulse current (IPPM), tested with a 10/1000 µs waveform. This value represents the upper limit of voltage imposed on protected circuitry during a 400 W transient event. The low clamping ratio (VC/VBR ≈ 1.39) reflects efficient avalanche conduction and minimal voltage overshoot beyond breakdown.
Does TPSMA20HE3/61T have bidirectional capability?
No, TPSMA20HE3/61T is unidirectional only, as confirmed in the Vishay datasheet's FEATURES section and ELECTRICAL CHARACTERISTICS table. It protects against positive-going transients on the cathode side relative to anode (ground). For bidirectional protection, a separate device such as TPSMA20CA would be required - but that part is not AEC-Q101 qualified and uses different marking and packaging conventions.
What is the thermal pad layout recommendation for TPSMA20HE3/61T?
Vishay specifies mounting TPSMA20HE3/61T on PCBs with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads attached to each terminal to achieve rated 400 W peak pulse power. This layout maximizes heat dissipation during transient events and ensures compliance with derating curves in Figure 2 of the datasheet. Smaller pads reduce surge capability and may cause premature failure under repeated stress.
TPSMA20HE3/61T 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 13.7A
- 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)
TPSMA20HE3/61T FAQ
1.How can I place an order for TPSMA20HE3/61T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA20HE3/61T 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 TPSMA20HE3/61T reliable?
The price and inventory of TPSMA20HE3/61T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA20HE3/61T is usually 5 days.
3.What payment methods are accepted for TPSMA20HE3/61T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA20HE3/61T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA20HE3/61T?
TPSMA20HE3/61T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA20HE3/61T 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 TPSMA20HE3/61T?
For technical support, including TPSMA20HE3/61T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA20HE3/61T requirements.
6.How does Aetrix verify that TPSMA20HE3/61T is sourced from the original manufacturer or authorized distributors?
All TPSMA20HE3/61T 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 TPSMA20HE3/61T meets industry standards.
7.What is the process for return or replacement of TPSMA20HE3/61T?
All TPSMA20HE3/61T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA20HE3/61T, 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 TPSMA20HE3/61T part is unused and in its original packaging.
Return procedure for TPSMA20HE3/61T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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