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Vishay General Semiconductor - Diodes Division TPSMA20HE3_A/I
- Part No.:
- TPSMA20HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA20HE3_A/I.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,841
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Product details
Overview
TPSMA20HE3_A/I 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 20 V nominal breakdown voltage (VBR = 19.0–21.0 V), 400 W peak pulse power (10/1000 µs), 14.4 A peak pulse current (IPPM), 27.7 V maximum clamping voltage (VC), and operates up to TJ = 185 °C - used in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the TPSMA20HE3_A/I datasheet, TPSMA20HE3_A/I pinout, TPSMA20HE3_A/I application, or TPSMA20HE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HE3 suffix), MSL Level 1 rating, 1.0 W steady-state power dissipation, and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge conditions. Its junction temperature capability of 185 °C enables operation in under-hood automotive environments and high-temperature industrial enclosures without derating penalties beyond those defined in Figure 2 of the datasheet.
The device responds to transients within picoseconds and maintains low incremental surge resistance during 10/1000 µs waveform events. Clamping performance is specified at IPPM = 14.4 A, delivering VC ≤ 27.7 V - critical for protecting 24 V system ICs with 30 V absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable triggering above 24 V system nominal while staying below 30 V IC damage thresholds |
| VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1 µA, compatible with 18 V rail monitoring |
| VC @ IPPM | 27.7 V - clamped voltage at 14.4 A surge, limiting stress on downstream 30 V-rated MOSFETs or regulators |
| PPPM | 400 W - peak pulse power handling per 10/1000 µs waveform, supporting IEC 61000-4-5 Level 4 compliance |
| TJ max. | 185 °C - enables use in AEC-Q101 automotive applications without thermal derating in engine control modules |
| Polarity | Unidirectional - protects against positive-going transients only; requires external circuit design for bidirectional immunity |
| MSL Level | Level 1 (J-STD-020) - supports lead-free reflow up to 260 °C peak without moisture-induced failure |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode indicated by molded band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), with 2.54 mm lead pitch and matte tin-plated terminals compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; must be routed with minimal inductance to preserve clamping speed |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 24 V supply rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Reduces long-term parameter drift under thermal cycling and humidity exposure, improving field reliability in automotive ECUs |
| AEC-Q101 qualification (HE3) | Validated for automotive-grade production use including temperature cycling, HTRB, and ESD testing per AEC standard |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), enhancing protection margin for sensitive analog front-ends |
| 400 W peak pulse power | Supports robust immunity to ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 combination wave surges in 24 V systems |
| 185 °C junction rating | Eliminates need for thermal derating in under-hood applications up to +125 °C ambient with 60 °C rise |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller I/O from load dump and inductive switching transients in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 24 V supply and ground, triggered within <1 ns to limit voltage to ≤27.7 V during 100 V/100 ms load dump events. Use Value: Prevents latch-up or permanent damage to 30 V-rated CAN transceivers and MCU power domains without requiring series impedance. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff voltage (VWM = 17.1 V) allows normal 24 V logic detection while clamping transients >27.7 V to protect optocoupler input stages. Use Value: Enables direct interface to industrial field devices without additional RC filtering or voltage dividers, reducing BOM count and board space. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Board |
Use Scenario: Secondary-side overvoltage suppression on 24 V DC-DC converter outputs feeding base station control circuitry. IC Role / Device Role / Timing Role: Fast-response TVS placed across output capacitor to absorb residual switching spikes and lightning-induced surges coupled through secondary windings. Use Value: Maintains output regulation integrity during 400 W transient events without affecting steady-state efficiency or thermal design. | Use Scenario: Protecting gate drivers and MCU GPIOs on washing machine motor control boards subject to brush-commutator noise and pump relay switching. IC Role / Device Role / Timing Role: Mounted adjacent to motor driver ICs to clamp inductive kickback from H-bridge freewheeling paths before it couples into logic supply rails. Use Value: Reduces electromagnetic interference (EMI) emissions and prevents false resets caused by voltage rail perturbation during motor commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same SMA package, 20 V VBR, but rated for 400 W with 1.0 W PD; no AEC-Q101 qualification; MSL Level 1 confirmed | Not qualified for automotive production; suitable for commercial/industrial designs where qualification is not mandated | Select SMAJ20A when AEC-Q101 is unnecessary and cost sensitivity outweighs qualification requirements |
| TPSMA20AHM3_A/I | Identical electrical specs and AEC-Q101 qualification; halogen-free molding compound; same HE3 mechanical form factor | Required for RoHS-compliant, halogen-free manufacturing programs (e.g., EU automotive Tier 1s) | Choose TPSMA20AHM3_A/I when halogen-free compliance is mandatory per material declaration requirements |
Compared with SMAJ20A and TPSMA20AHM3_A/I, the TPSMA20HE3_A/I provides AEC-Q101 qualification and RoHS compliance in a standard tin-plated termination, making it the default choice for automotive and industrial applications requiring both reliability validation and supply chain traceability.
Availability
TPSMA20HE3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power supply design requiring stable component supply, full AEC-Q101 documentation, and MSL Level 1 reflow compatibility.
Supply support for TPSMA20HE3_A/I 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, high-temperature, and automotive-qualified components.
The TPSMAxxA family was engineered specifically for high-temperature transient suppression in automotive and industrial environments, targeting applications demanding 185 °C junction operation, AEC-Q101 compliance, and robust 400 W surge handling in compact SMA packages.
FAQ
What is the maximum clamping voltage of the TPSMA20HE3_A/I under a 10/1000 µs surge?
The TPSMA20HE3_A/I has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current of 14.4 A under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C with recommended PCB pad layout (0.2" × 0.2" copper per terminal). The clamping voltage remains stable across temperature due to the device's low temperature coefficient of VBR (0.082 %/°C).
Is the TPSMA20HE3_A/I qualified for automotive applications?
Yes, the TPSMA20HE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3". It meets all stress tests required for automotive-grade discrete semiconductors, including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) per AEC-Q101 Rev D. This qualification applies directly to the TPSMA20HE3_A/I part number.
What does the "HE3" suffix indicate in TPSMA20HE3_A/I?
The "HE3" suffix in TPSMA20HE3_A/I denotes RoHS-compliant construction and AEC-Q101 qualification. It specifies matte tin-plated leads, JESD201 Class 2 whisker resistance, and compliance with MSL Level 1 (peak reflow temperature 260 °C). The "A/I" denotes packaging in 13" diameter plastic tape and reel, with 7500 units per reel - a configuration validated for automated SMT assembly.
Can the TPSMA20HE3_A/I be used in bidirectional protection circuits?
No, the TPSMA20HE3_A/I is unidirectional only, as explicitly stated in the Vishay datasheet. It protects against positive transients on the cathode side relative to anode (ground). For bidirectional protection, two TPSMA20HE3_A/I devices must be connected in series opposition, or a dedicated bidirectional TVS such as TPSMA20CA should be selected instead.
What is the standoff voltage (VWM) and why is it important for TPSMA20HE3_A/I selection?
The TPSMA20HE3_A/I has a maximum working peak reverse voltage (VWM) of 17.1 V, meaning it remains in high-impedance state below this voltage with leakage <1 µA at 25 °C. This parameter ensures reliable operation on 18 V or 24 V nominal rails without false triggering or excessive power loss - critical for maintaining signal integrity and minimizing standby current in always-on automotive modules.
TPSMA20HE3_A/I 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/I FAQ
1.How can I place an order for TPSMA20HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA20HE3_A/I 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/I reliable?
The price and inventory of TPSMA20HE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for TPSMA20HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA20HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA20HE3_A/I?
TPSMA20HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA20HE3_A/I 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/I?
For technical support, including TPSMA20HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA20HE3_A/I requirements.
6.How does Aetrix verify that TPSMA20HE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMA20HE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of TPSMA20HE3_A/I?
All TPSMA20HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA20HE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for TPSMA20HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA20HE3_A/I Tags
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