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Vishay General Semiconductor - Diodes Division TPSMA20HE3_A/H
- Part No.:
- TPSMA20HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA20HE3_A/H.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,650
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Product details
Overview
TPSMA20HE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching and lightning-induced transients on power rails and signal lines. It features a 20 V breakdown voltage (VBR = 19.0–21.0 V at 1 mA), 400 W peak pulse power (10/1000 µs), 1.0 W steady-state power dissipation, 185 °C maximum junction temperature, and SMA (DO-214AC) package - used in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMA20HE3_A/H datasheet, TPSMA20HE3_A/H pinout, TPSMA20HE3_A/H application, or TPSMA20HE3_A/H equivalent, key selection criteria include unidirectional clamping capability, AEC-Q101 qualification status, TJ = 185 °C thermal rating, 27.7 V maximum clamping voltage at 14.4 A IPPM, and RoHS-compliant matte tin-plated terminals solderable per J-STD-002.
Technical Context
This TVS diode operates as a unidirectional clamping device with an anisotropic rectifier structure optimized for high-reliability environments. Its junction passivation enables stable performance up to TJ = 185 °C and meets MSL Level 1 (260 °C peak reflow). The device responds in sub-nanosecond time to transient overvoltages and maintains low incremental surge resistance during 400 W pulse events.
It is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), exhibits 3.5 V max forward voltage at 25 A, and delivers consistent clamping behavior across -65 °C to +185 °C operating range. The 0.082 %/°C temperature coefficient of VBR ensures predictable voltage shift under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V at 1 mA - defines precise clamping onset threshold for overvoltage protection |
| VWM | 17.1 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 27.7 V at 14.4 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs waveform) - peak surge energy handling capacity for lightning/inductive spikes |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes polarity |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded epoxy case meeting UL 94 V-0; cathode indicated by color band; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to protected line (e.g., 12 V rail); conducts during overvoltage event to shunt current to ground |
| Cathode | Current exit point; marked with band | Typically tied to system ground or lower-potential reference; establishes unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable 185 °C operation and low leakage (<1 μA at VWM) across full temperature range |
| 400 W peak pulse power (10/1000 µs) | Withstands automotive load-dump and industrial relay-switching surges without degradation |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress tests including HTRB, HTGB, and temperature cycling |
| MSL Level 1, 260 °C peak reflow | Compatible with standard SMT assembly processes without moisture sensitivity concerns |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during transients, reducing risk to downstream MOSFETs and controllers |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive voltage spikes above 27.7 V. Use Value: Prevents latch-up or gate oxide damage in microcontrollers and CAN transceivers by limiting transient voltage to ≤27.7 V at 14.4 A. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive coupling in factory automation sensors. IC Role / Device Role / Timing Role: TVS connected across signal and return path to absorb fast-rising transients before reaching ADC front-end or op-amp inputs. Use Value: Maintains signal integrity by suppressing >8 kV contact ESD (IEC 61000-4-2) with <1 ns response and <1 μA leakage at 17.1 V. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Safeguarding AC/DC adapter secondary-side 5–24 V outputs against surge coupling from primary side or external connectors. IC Role / Device Role / Timing Role: Unidirectional TVS installed at output connector to clamp overvoltage before reaching USB-PD controller or charging IC. Use Value: Enables compliance with UL 62368-1 surge immunity requirements using compact SMA footprint and 400 W pulse rating. | Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) from induced surges on 48 V DC feed lines in outdoor telecom cabinets. IC Role / Device Role / Timing Role: TVS mounted across DC input pins to divert lightning-induced common-mode surges to chassis ground. Use Value: Supports IEC 61000-4-5 Level 3 (2 kV) surge immunity while maintaining <1 μA leakage at nominal 48 V derated VWM. |
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 SMA package, 20 V VBR, but rated for 400 W (10/1000 µs); not AEC-Q101 qualified; higher VC = 32.4 V | Lacks automotive qualification; suitable for commercial/industrial use only | Select when AEC-Q101 is not required and higher clamping voltage is acceptable |
| TPSMA20AHM3_A/H | Identical electrical specs; halogen-free variant with same RoHS/AEC-Q101 compliance; identical thermal and surge ratings | No functional difference; differs only in material composition (halogen-free molding compound) | Choose for halogen-free compliance mandates without sacrificing performance or qualification |
Compared with SMAJ20A and TPSMA20AHM3_A/H, the TPSMA20HE3_A/H provides identical clamping performance and automotive qualification in a RoHS-compliant, non-halogen-free version - making it optimal for cost-sensitive AEC-Q101 designs where halogen content is unrestricted.
Availability
TPSMA20HE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface clamping, and telecom DC feed surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for TPSMA20HE3_A/H 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, MOSFETs, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The TPSMAxxA series belongs to Vishay's PAR® transient voltage suppressor product line, engineered specifically for robust, high-temperature-stable clamping in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the breakdown voltage tolerance for TPSMA20HE3_A/H?
The TPSMA20HE3_A/H has a specified breakdown voltage range of 19.0 V (minimum) to 21.0 V (maximum) at 1 mA test current, with a typical value of 20.0 V. This ±5 % tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for consistent overvoltage protection in safety-critical systems.
Is TPSMA20HE3_A/H suitable for automotive applications?
Yes, TPSMA20HE3_A/H is AEC-Q101 qualified and rated for TJ = 185 °C, making it suitable for under-hood and body-control module applications. Its qualification covers high-temperature reverse bias, temperature cycling, and humidity testing - confirming reliability in automotive environments where TPSMA20HE3_A/H is deployed for power rail and signal line protection.
What does the "HE3" suffix indicate in TPSMA20HE3_A/H?
The "HE3" suffix in TPSMA20HE3_A/H denotes RoHS-compliant construction and AEC-Q101 qualification. It identifies the part as meeting automotive reliability standards and environmental compliance requirements, distinguishing it from non-qualified variants like TPSMA20A or halogen-free HM3 versions - ensuring TPSMA20HE3_A/H meets both regulatory and functional demands.
What is the maximum clamping voltage of TPSMA20HE3_A/H during a surge event?
The maximum clamping voltage (VC) of TPSMA20HE3_A/H is 27.7 V at 14.4 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 400 W transient, directly determining the safe operating margin for downstream components such as microcontrollers and power switches.
How does TPSMA20HE3_A/H compare to bidirectional TVS diodes?
TPSMA20HE3_A/H is unidirectional and protects only against positive-going transients, unlike bidirectional variants that clamp both polarities. Its design yields lower leakage (<1 μA at 17.1 V) and tighter VBR tolerance than comparable bidirectional parts - making TPSMA20HE3_A/H preferred for DC power rail protection where polarity is fixed and low leakage is essential.
TPSMA20HE3_A/H 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_A/H FAQ
1.How can I place an order for TPSMA20HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA20HE3_A/H 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_A/H reliable?
The price and inventory of TPSMA20HE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA20HE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA20HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA20HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA20HE3_A/H?
TPSMA20HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA20HE3_A/H 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_A/H?
For technical support, including TPSMA20HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA20HE3_A/H requirements.
6.How does Aetrix verify that TPSMA20HE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA20HE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA20HE3_A/H?
All TPSMA20HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA20HE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for TPSMA20HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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