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Vishay General Semiconductor - Diodes Division TPSMA20AHE3_A/H
- Part No.:
- TPSMA20AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA20AHE3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,646
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Product details
Overview
TPSMA20AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 20 V breakdown voltage (VBR = 19.0–21.0 V), 400 W peak pulse power (10/1000 µs), 14.4 V maximum clamping voltage at 14.4 A, 1.0 W steady-state power dissipation, and operates up to +185 °C junction temperature - deployed in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMA20AHE3_A/H datasheet, TPSMA20AHE3_A/H pinout, TPSMA20AHE3_A/H application, or TPSMA20AHE3_A/H equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and verified clamping performance under 10/1000 µs surge conditions.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional architecture provides forward conduction only during reverse overvoltage events, with clamping initiated at VBR = 19.0–21.0 V and limiting voltage to ≤27.7 V at rated IPPM.
The device meets MSL Level 1 per J-STD-020 (peak reflow = 260 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 - confirming suitability for automotive-grade board-level ESD and surge protection where reliability under thermal stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - precise reverse breakdown threshold ensures consistent clamping onset across production lots |
| VWM | 17.1 V - maximum continuous reverse working voltage before leakage exceeds 1 μA at 25 °C |
| VC @ IPPM | 27.7 V - clamped voltage at 14.4 A peak pulse current, defining worst-case rail overshoot during surge |
| PPPM | 400 W - peak pulse power handling capability with 10/1000 µs waveform, enabling robust transient absorption |
| TJ max. | +185 °C - extended junction temperature rating supports operation in engine bay or industrial control enclosures |
| IFSM | 40 A - 8.3 ms single half-sine surge current rating, validating resilience against motor-switching events |
| Polarity | Unidirectional - cathode-banded configuration protects DC rails without forward conduction during normal operation |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and 0.078" lead spacing |
Pinout & Package
TPSMA20AHE3_A/H is housed in the SMA (DO-214AC) package: a molded plastic case with two coplanar gull-wing leads, UL 94 V-0 rated compound, and cathode identified by a color band. The package measures 5.28 mm × 3.99 mm × 2.29 mm (L × W × H) with 2.54 mm lead pitch and 1.88 mm pad width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path terminal | Connected to system ground or lower-potential node; conducts during reverse-transient clamping |
| Cathode | Reverse-biased voltage reference terminal | Connected to protected line (e.g., 12 V rail); initiates avalanche breakdown when VLINE > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process reduces leakage drift and improves long-term stability at TJ = 150 °C |
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| MSL Level 1 rating | Enables single-pass reflow assembly without moisture sensitivity concerns (peak temp = 260 °C) |
| Low clamping ratio (VC/VBR) | 1.385 - tight ratio minimizes overvoltage exposure to downstream ICs during transient events |
| High IFSM / PD ratio | 40 A / 1.0 W - exceptional surge-to-steady-state power ratio supports infrequent but severe load-dump events |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and DC/DC converter input stage. Use Value: Limits voltage excursion to ≤27.7 V during 10/1000 µs surges, preventing damage to 36 V-rated regulators and microcontrollers. | Use Scenario: Shielding analog outputs of pressure sensors in factory automation PLC modules from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on 4–20 mA current loop output pins. Use Value: Clamps induced spikes within 1 ns while maintaining <1 µA leakage at 17.1 V, preserving loop accuracy and noise immunity. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Surge Suppression |
Use Scenario: Safeguarding AC/DC adapter primary-side rectifiers and controllers against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Secondary-level TVS placed after bridge rectifier, upstream of bulk capacitor. Use Value: Absorbs 400 W pulses without degradation, reducing need for oversized MOVs and improving compactness. | Use Scenario: Protecting PoE-powered network switches from longitudinal surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Unidirectional clamp on each DC feed pair, referenced to chassis ground. Use Value: Withstands repetitive 10/1000 µs surges at 0.01% duty cycle, ensuring uptime in outdoor telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Same VBR range (19.0–21.0 V), higher PPPM = 600 W, SMB (DO-214AA) package - 2.5 mm wider body | Preferred where higher surge margin is required and PCB space allows larger footprint | Select SMBJ20A if design requires ≥600 W pulse rating and layout accommodates SMB outline |
| 1.5SMC20A | Identical electrical specs, but SMC (DO-214AB) package - 0.25 mm thicker and 1.2 mm longer than SMA | Used in legacy industrial designs with established SMC land patterns and thermal mass requirements | Choose 1.5SMC20A only when replacing existing SMC-based designs or needing higher thermal mass |
Compared with SMBJ20A and 1.5SMC20A, TPSMA20AHE3_A/H offers the smallest footprint (SMA) among 20 V unidirectional TVS diodes with AEC-Q101 qualification, making it optimal for space-constrained automotive modules where 400 W pulse rating suffices and thermal cycling reliability is prioritized.
Availability
TPSMA20AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer power adapter input stages requiring stable component supply, AEC-Q101 compliance, and high-temperature operational integrity.
Supply support for TPSMA20AHE3_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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-reliability clamping in harsh environments - including under-hood automotive, industrial motor drives, and telecom infrastructure.
FAQ
What is the exact breakdown voltage tolerance for TPSMA20AHE3_A/H?
The TPSMA20AHE3_A/H has a guaranteed breakdown voltage range of 19.0 V (minimum) to 21.0 V (maximum) at 1.0 mA test current, with 20.0 V nominal. This ±5% tolerance is measured per ANSI/IEEE C62.35 and validated across production lots. The parameter is critical for ensuring predictable clamping behavior in TPSMA20AHE3_A/H-based protection circuits without premature triggering or insufficient surge suppression.
Is TPSMA20AHE3_A/H RoHS-compliant and halogen-free?
Yes, TPSMA20AHE3_A/H is RoHS-compliant and halogen-free. The "HE3" suffix indicates compliance with EU RoHS Directive 2011/65/EU and halogen-free material categorization per Vishay specification doc#99912. The molding compound meets UL 94 V-0, and terminals are matte tin-plated - fully compatible with lead-free reflow processes and environmentally regulated supply chains.
Does TPSMA20AHE3_A/H require derating above 25 °C ambient?
Yes, TPSMA20AHE3_A/H must be derated above TA = 25 °C. Its peak pulse power (PPPM) decreases linearly with rising junction temperature per Figure 2 in datasheet 88405: at TJ = 125 °C, PPPM drops to ~65% of 400 W; at TJ = 150 °C, it falls to ~45%. Derating ensures safe operation within the 185 °C maximum junction limit and maintains clamping integrity in TPSMA20AHE3_A/H deployments like engine control modules.
What is the maximum clamping voltage of TPSMA20AHE3_A/H at its rated peak pulse current?
The maximum clamping voltage (VC) of TPSMA20AHE3_A/H is 27.7 V at its rated peak pulse current (IPPM) of 14.4 A, tested with a 10/1000 µs waveform. This value defines the upper bound of voltage seen by downstream components during worst-case surge events and is measured under standardized conditions per JEDEC standards - a key parameter for validating TPSMA20AHE3_A/H in 12 V or 24 V system protection schemes.
How does the AEC-Q101 qualification impact TPSMA20AHE3_A/H usage in automotive designs?
TPSMA20AHE3_A/H's AEC-Q101 qualification certifies it has passed accelerated stress tests for temperature cycling, humidity bias, high-temperature operating life, and mechanical shock - confirming suitability for automotive powertrain, chassis, and body electronics. This qualification eliminates need for additional qualification testing by Tier 1 suppliers and enables direct use in TPSMA20AHE3_A/H-based ECU protection without design revalidation.
TPSMA20AHE3_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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- 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)
TPSMA20AHE3_A/H FAQ
1.How can I place an order for TPSMA20AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA20AHE3_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 TPSMA20AHE3_A/H reliable?
The price and inventory of TPSMA20AHE3_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 TPSMA20AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA20AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA20AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA20AHE3_A/H?
TPSMA20AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA20AHE3_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 TPSMA20AHE3_A/H?
For technical support, including TPSMA20AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA20AHE3_A/H requirements.
6.How does Aetrix verify that TPSMA20AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA20AHE3_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 TPSMA20AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA20AHE3_A/H?
All TPSMA20AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA20AHE3_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 TPSMA20AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA20AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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