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Vishay General Semiconductor - Diodes Division TPSMB20HE3/52T
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- Part No.:
- TPSMB20HE3/52T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB20HE3/52T.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,941
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Product details
Overview
TPSMB20HE3/52T 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 reliably up to TJ = 185 °C in automotive and industrial power supply protection.
For engineers reviewing the TPSMB20HE3/52T datasheet, TPSMB20HE3/52T pinout, TPSMB20HE3/52T application, or TPSMB20HE3/52T equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and clamping performance under 10/1000 µs surge conditions.
Technical Context
The TPSMB20HE3/52T employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its junction passivation enables reliable operation at TJ = 185 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature.
As a unidirectional TVS diode, it conducts only during reverse overvoltage events-clamping transients above VWM = 17.1 V while maintaining <1 µA leakage at rated stand-off voltage. It delivers 600 W peak pulse power with fast response time and excellent clamping ratio (VC/VBR ≈ 1.39).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - Ensures consistent breakdown initiation across production lots and temperature range. |
| VWM | 17.1 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below VBR. |
| VC @ IPPM | 27.7 V - Clamped voltage during 21.7 A 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - Peak pulse power handling capability under standardized 10/1000 µs waveform; validates robustness against common surge threats. |
| TJ max. | +185 °C - Enables use in under-hood automotive and high-ambient industrial environments without derating. |
| Polarity | Unidirectional - Provides reverse-biased surge suppression only; requires correct orientation relative to DC rail polarity. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.205" × 0.220" footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line (e.g., GND or return path); conducts during forward surge or ESD event. |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential side (e.g., VIN or signal line); initiates avalanche breakdown when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per AEC stress test requirements. |
| Junction passivated anisotropic rectifier | Reduces parameter drift over lifetime and improves consistency of VBR and leakage across temperature and aging. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorning or delamination risks. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision and downstream IC survivability. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Suppressing load-dump and alternator ripple transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VBAT and GND to clamp reverse surges above 17.1 V. Use Value: Maintains system uptime by preventing latch-up or gate oxide damage in MCU and CAN transceivers during ISO 7637-2 Pulse 5a events. | Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with 4–20 mA or 0–10 V output lines to limit transient voltage to ≤27.7 V. Use Value: Preserves measurement accuracy and prevents ADC saturation or op-amp input stage damage during IEC 61000-4-2 contact discharge. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Safeguarding AC/DC adapter primary-side rectifiers and controllers against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input to absorb differential-mode surges before they reach switching controller. Use Value: Extends adapter lifetime by limiting peak voltage stress on electrolytic capacitors and MOSFETs during 1.2/50 µs line surges. | Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras, wireless APs) from induced transients on 48 V DC feed lines. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; TPSMB20HE3/52T used on positive rail with complementary device on return path if needed. Use Value: Prevents latch-up in IEEE 802.3af/at PD interface ICs by clamping surges to 27.7 V before reaching classification and detection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient 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. | Not certified for automotive under-hood use; suitable for industrial/commercial designs where qualification is not mandated. | Select SMBJ20A when AEC-Q101 compliance is unnecessary and cost optimization is prioritized. |
| TPSMB20AHM3/52T | Halogen-free variant of same base device; identical electrical specs, same AEC-Q101 qualification, but with halogen-free molding compound. | Required for RoHS-compliant, halogen-free BOMs in EU automotive programs (e.g., VW TL 813). | Choose TPSMB20AHM3/52T when material compliance mandates halogen-free construction without sacrificing performance or qualification. |
Compared with SMBJ20A and TPSMB20AHM3/52T, the TPSMB20HE3/52T uniquely combines AEC-Q101 qualification, RoHS compliance, and standard tin-lead-free plating in a single cost-optimized variant-making it the default choice for Tier 1 automotive suppliers requiring validated reliability without halogen-free overhead.
Availability
TPSMB20HE3/52T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface clamping, and consumer power adapter surge suppression requiring stable component supply across multi-year production cycles.
Supply support for TPSMB20HE3/52T 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 TPSMB series was developed specifically for robust transient suppression in harsh-environment applications-including automotive engine control, industrial motor drives, and telecom infrastructure-where sustained operation at 185 °C and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the TPSMB20HE3/52T under a 10/1000 µs surge?
The TPSMB20HE3/52T has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current of 21.7 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream circuitry remains within safe voltage limits during transient events. The TPSMB20HE3/52T achieves this clamping performance while maintaining low incremental surge resistance and stable behavior up to 185 °C junction temperature.
Is the TPSMB20HE3/52T AEC-Q101 qualified?
Yes, the TPSMB20HE3/52T is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101-qualified variants. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and surge endurance-validating suitability for automotive under-hood applications. The TPSMB20HE3/52T is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the TPSMB family.
What does the "HE3" suffix indicate in TPSMB20HE3/52T?
The "HE3" suffix in TPSMB20HE3/52T identifies a RoHS-compliant, AEC-Q101-qualified version with matte tin-plated leads that meet J-STD-002 and JESD 22-B102 solderability standards and JESD 201 Class 2 whisker resistance. It distinguishes this variant from non-qualified versions (e.g., base TPSMB20A) and halogen-free alternatives (e.g., HM3). The "52T" denotes tape-and-reel packaging per Vishay's preferred delivery mode for SMB devices.
Can the TPSMB20HE3/52T be used in bidirectional protection circuits?
No, the TPSMB20HE3/52T is unidirectional only, as specified in Vishay's datasheet. It provides clamping only for reverse-biased overvoltage events and must be oriented with cathode toward the higher-potential node. For bidirectional protection, two TPSMB20HE3/52T devices may be connected in series opposing configuration, or a dedicated bidirectional TVS such as SMBJ20CA should be selected instead.
What is the thermal derating behavior of the TPSMB20HE3/52T above 25 °C ambient?
The TPSMB20HE3/52T follows standard thermal derating curves per Figure 2 in Vishay document 88406: peak pulse power decreases linearly above TA = 25 °C, reaching ~50 % of rated 600 W at TA ≈ 100 °C (with appropriate PCB copper area). Derating is based on junction temperature limits (TJ ≤ 185 °C) and assumes mounting on 0.2" × 0.2" copper pads per terminal. Full derating data is provided in the official TPSMB20HE3/52T datasheet curve.
TPSMB20HE3/52T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 20.6A
- 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 (SMBJ)
TPSMB20HE3/52T FAQ
1.How can I place an order for TPSMB20HE3/52T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB20HE3/52T 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 TPSMB20HE3/52T reliable?
The price and inventory of TPSMB20HE3/52T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB20HE3/52T is usually 5 days.
3.What payment methods are accepted for TPSMB20HE3/52T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB20HE3/52T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB20HE3/52T?
TPSMB20HE3/52T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB20HE3/52T 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 TPSMB20HE3/52T?
For technical support, including TPSMB20HE3/52T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB20HE3/52T requirements.
6.How does Aetrix verify that TPSMB20HE3/52T is sourced from the original manufacturer or authorized distributors?
All TPSMB20HE3/52T 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 TPSMB20HE3/52T meets industry standards.
7.What is the process for return or replacement of TPSMB20HE3/52T?
All TPSMB20HE3/52T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB20HE3/52T, 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 TPSMB20HE3/52T part is unused and in its original packaging.
Return procedure for TPSMB20HE3/52T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB20HE3/52T Tags
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