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Vishay General Semiconductor - Diodes Division TPSMB20AHE3_A/I
- Part No.:
- TPSMB20AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB20AHE3_A/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,446
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Product details
Overview
TPSMB20AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching transients and lightning-induced surges on power rails and signal lines. It features a 20 V breakdown voltage (VBR = 19–21 V), 17.1 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 21.7 A peak pulse current (IPPM), and 27.7 V maximum clamping voltage (VC) at IPPM, operating up to +185 °C junction temperature.
For engineers reviewing the TPSMB20AHE3_A/I datasheet, TPSMB20AHE3_A/I pinout, TPSMB20AHE3_A/I application, or TPSMB20AHE3_A/I equivalent, this page delivers verified package mapping (SMB/DO-214AA), polarity confirmation (cathode-banded unidirectional), thermal derating curves, AEC-Q101 qualification status, and real-world clamping performance data under standardized surge waveforms.
Technical Context
The TPSMB20AHE3_A/I employs passivated anisotropic rectifier technology with optimized junction passivation for stable high-temperature operation. Its unidirectional configuration provides forward conduction during overvoltage events while maintaining low leakage (<1 µA at VWM) and fast response time (<1 ns) to transient threats.
Rated for 600 W peak pulse power per 10/1000 µs waveform and 75 A non-repetitive forward surge current (8.3 ms half-sine), it supports automotive-grade reliability with MSL Level 1 moisture sensitivity and JESD 201 Class 2 whisker resistance - confirmed by its HE3 suffix denoting RoHS-compliant, AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable triggering above system nominal voltage without false clamping |
| VWM | 17.1 V - defines maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 27.7 V - clamps 21.7 A transient to safe level for downstream 24 V-rated ICs and MOSFETs |
| PPPM | 600 W - sustains standardized 10/1000 µs surge energy without degradation |
| TJ max. | +185 °C - enables placement near hot components (e.g., power converters, engine control units) |
| Polarity | Unidirectional - protects DC rails only; requires correct cathode orientation toward positive rail |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD footprint with 5.59 mm × 4.06 mm body and 2.20 mm height |
Pinout & Package
TPSMB20AHE3_A/I uses the SMB (DO-214AA) surface-mount package: a 2-terminal, unidirectional device with cathode indicated by a color band. The package features matte tin-plated leads, UL 94 V-0 molding compound, and meets J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-side reference; carries full surge current during clamping |
| Cathode | Transient voltage sensing node | Connected to protected line (e.g., 24 V rail); triggers conduction when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TC, HAST, and UHAST |
| 185 °C junction rating | Enables use in under-hood ECUs, motor controllers, and industrial drives without thermal derating penalties |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected devices compared to higher-ratio TVS diodes |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking or special handling |
| Passivated anisotropic rectifier | Delivers stable VBR drift < ±5 % over 1000 hrs at 150 °C, critical for long-life systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control modules (ECMs) against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC/DC converters and microcontrollers. Use Value: Limits transient excursions to ≤27.7 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic powered from regulated 24 V rails. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) of pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional TPSMB20AHE3_A/I guards against positive-going ESD and inductive kickback on sensor output lines. Use Value: Maintains signal integrity with <1 µA leakage at 17.1 V, avoiding offset errors in precision current-loop interfaces. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Surge Suppression |
Use Scenario: Safeguarding 12–24 V DC input stages of PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: First-line transient suppression before primary filtering and regulation stages. Use Value: Withstands repetitive 600 W surges at 0.01 % duty cycle, meeting GR-1089-CORE telecom immunity requirements. | Use Scenario: Absorbing back-EMF spikes from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive turn-off transients. Use Value: 75 A IFSM rating handles repeated 8.3 ms half-sine surges common in motor commutation cycles. |
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 SMB package, identical VBR (19–21 V), but rated for 600 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated | Select SMBJ20A when cost sensitivity outweighs automotive compliance requirements |
| TPSMB20AHM3_A/I | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free molding compound (HM3 vs. HE3) | Required for RoHS+halogen-free compliance programs (e.g., EU automotive Tier 1 procurement) | Choose TPSMB20AHM3_A/I if halogen-free material specification is contractually enforced |
Compared with SMBJ20A and TPSMB20AHM3_A/I, the TPSMB20AHE3_A/I offers AEC-Q101 qualification with standard RoHS compliance - making it optimal for automotive and high-reliability industrial applications where both qualification and supply-chain traceability are mandatory, without requiring halogen-free materials.
Availability
TPSMB20AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power supplies, and consumer appliance motor drives requiring stable component supply across multi-year production cycles.
Supply support for TPSMB20AHE3_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 solutions.
The TPSMB series was engineered specifically for robust transient suppression in harsh environments - targeting automotive power distribution, industrial automation, and infrastructure equipment where sustained 185 °C operation and AEC-Q101 validation are essential.
FAQ
What is the clamping voltage of the TPSMB20AHE3_A/I at its rated peak pulse current?
The TPSMB20AHE3_A/I has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current (IPPM) of 21.7 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuitry downstream will not experience voltages exceeding 27.7 V during transient events - critical for safeguarding 24 V-rated components. The TPSMB20AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is the TPSMB20AHE3_A/I qualified for automotive applications?
Yes, the TPSMB20AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's official datasheet (Document Number: 88406). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive powertrain, body electronics, and ADAS subsystems. The TPSMB20AHE3_A/I is explicitly designated for automotive use in Vishay's ordering nomenclature.
What does the "HE3" suffix mean in TPSMB20AHE3_A/I?
The "HE3" suffix in TPSMB20AHE3_A/I indicates RoHS-compliant construction with matte tin-plated leads and AEC-Q101 qualification. It also confirms compliance with JESD 201 Class 2 whisker resistance and MSL Level 1 handling per J-STD-020. The "A" denotes the revision code, and "I" specifies packaging in 13-inch tape-and-reel format (3200 units per reel). This full designation ensures traceability to Vishay's qualified manufacturing lot and material specifications for the TPSMB20AHE3_A/I.
Can the TPSMB20AHE3_A/I be used in bidirectional protection circuits?
No, the TPSMB20AHE3_A/I is unidirectional only, as stated in the Vishay datasheet. It conducts current in one direction - from cathode to anode - during overvoltage events and blocks reverse current up to its 17.1 V stand-off voltage. For bidirectional protection (e.g., AC lines or differential signal pairs), a separate device such as the SMBJ20CA or a dual-diode array would be required. Using the TPSMB20AHE3_A/I in reverse-biased configurations risks permanent failure due to lack of reverse avalanche capability.
What is the maximum junction temperature rating for the TPSMB20AHE3_A/I?
The TPSMB20AHE3_A/I is rated for a maximum junction temperature (TJ) of +185 °C, enabling deployment in high-thermal-stress environments such as engine compartments, motor drive inverters, and enclosed industrial controls. This rating is validated through accelerated life testing and is supported by thermal derating curves in the datasheet (Fig. 2), which show allowable pulse power reduction above 25 °C ambient. The TPSMB20AHE3_A/I maintains specified electrical parameters within this full temperature range.
TPSMB20AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 21.7A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
TPSMB20AHE3_A/I FAQ
1.How can I place an order for TPSMB20AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB20AHE3_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 TPSMB20AHE3_A/I reliable?
The price and inventory of TPSMB20AHE3_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 TPSMB20AHE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMB20AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB20AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB20AHE3_A/I?
TPSMB20AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB20AHE3_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 TPSMB20AHE3_A/I?
For technical support, including TPSMB20AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB20AHE3_A/I requirements.
6.How does Aetrix verify that TPSMB20AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMB20AHE3_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 TPSMB20AHE3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMB20AHE3_A/I?
All TPSMB20AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB20AHE3_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 TPSMB20AHE3_A/I part is unused and in its original packaging.
Return procedure for TPSMB20AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB20AHE3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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