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Vishay General Semiconductor - Diodes Division TPSMB20AHE3/5BT
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- Part No.:
- TPSMB20AHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB20AHE3/5BT.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
TPSMB20AHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 20 V nominal breakdown voltage (VBR), 17.1 V maximum stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 18.2 A peak pulse current (IPPM), and 27.7 V maximum clamping voltage (VC) - deployed in automotive engine control units, industrial PLC I/O protection, and telecom power supply inputs.
For engineers reviewing the TPSMB20AHE3/5BT datasheet, TPSMB20AHE3/5BT pinout, TPSMB20AHE3/5BT application, or TPSMB20AHE3/5BT equivalent, this page delivers verified package dimensions, junction temperature derating curves, clamping performance at rated surge current, AEC-Q101 qualification status, and direct alternatives with documented electrical divergence.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable breakdown behavior up to 185 °C junction temperature, enabling operation in under-hood automotive environments. Its unidirectional polarity and SMB (DO-214AA) package support high-reliability placement on 5.0 mm × 5.0 mm copper pads per terminal.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), passes JESD201 Class 2 whisker testing, and delivers <1 ns response time with low incremental surge resistance - critical for protecting MOSFET gates and microcontroller I/O pins against fast-rising ESD and load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable conduction onset above system operating voltage while avoiding false triggering during normal transients |
| VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA, compatible with 15 V rail systems |
| VC @ IPPM | 27.7 V - clamped voltage seen by protected circuit during 18.2 A 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 600 W - peak pulse power handling capability under standardized waveform, supporting repetitive surge duty cycles up to 0.01 % |
| TJ max. | +185 °C - enables sustained operation in high-temperature zones such as automotive power modules and industrial motor drives |
| IFSM | 75 A - non-repetitive forward surge rating for 8.3 ms half-sine wave, suitable for load-dump event suppression |
| Leakage @ VWM | 1 μA at 25 °C - minimal standby power loss and negligible impact on high-impedance sensor bias networks |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode indicated by molded band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts when transient exceeds VBR, shunting surge current to ground |
| Anode | Cathode of internal PN junction | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JEDEC standards |
| Junction passivation | Stabilizes VBR drift across temperature and lifetime, reducing parameter shift to ≤±5 % over 1000 hrs at 150 °C |
| MSL Level 1 | Allows unlimited floor life and single-reflow processing at 260 °C peak without popcorn or delamination risk |
| Low clamping ratio (VC/VBR) | 1.385 - tight voltage margin between trigger and clamp improves system-level surge immunity without overdesigning downstream components |
| Halogen-free option available | HM3 suffix variant complies with IEC 61249-2-21 and RoHS, supporting green manufacturing requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing 12 V/24 V load dump transients in engine control modules and body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping spikes within 1 ns to protect LDOs and MCU power domains. Use Value: Withstands 75 A 8.3 ms surge and maintains VC ≤ 27.7 V, preventing brownout or latch-up in safety-critical ECUs. |
Use Scenario: Guarding analog sensor outputs (e.g., pressure, temperature) against ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-leakage (1 μA) TVS mounted directly at connector entry point, minimizing parasitic capacitance impact on signal integrity. Use Value: Clamps ±8 kV contact ESD per IEC 61000-4-2 while preserving 16-bit ADC accuracy via sub-1 pF junction capacitance at zero bias. |
| Telecom Power Supply Input | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding AC/DC adapter outputs and PoE injectors against lightning-induced surges on outdoor telecom equipment. IC Role / Device Role / Timing Role: Primary-stage TVS on secondary-side DC bus, coordinated with MOV and fuse for staged overvoltage defense. Use Value: 600 W PPPM rating and 185 °C TJ max enable uninterrupted operation in uncooled outdoor enclosures up to 85 °C ambient. |
Use Scenario: Protecting USB 2.0 data lines and VBUS in portable audio devices and smart home hubs from human-body-model ESD. IC Role / Device Role / Timing Role: Bidirectionally configured pair (two TPSMB20AHE3/5BT) on D+/D−, with single device on VBUS for overvoltage cutoff. Use Value: Fast response (<1 ns) and low dynamic resistance ensure signal eye diagram compliance while meeting IEC 61000-4-2 Level 4 immunity. |
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, but lower PPPM = 400 W; VC = 32.4 V at 12.3 A - higher clamping voltage and reduced surge margin | Limited to lower-energy transients (e.g., board-level ESD only); not rated for automotive load dump | Select SMBJ20A only for cost-sensitive consumer applications where 600 W capability is unnecessary. |
| TPSMB20AHM3/5BT | Identical electrical specs; halogen-free molding compound and JESD201 Class 2 whisker compliance - no performance trade-off | Required for RoHS+halogen-free compliance programs; identical thermal and surge performance | Choose TPSMB20AHM3/5BT when environmental compliance (IEC 61249-2-21) is mandated, with no design or layout change. |
Compared with SMBJ20A, TPSMB20AHE3/5BT provides 50 % higher peak pulse power and 4.7 V lower clamping voltage at rated current - directly improving system robustness against automotive and industrial surges. Against TPSMB20AHM3/5BT, it shares all electrical behavior but differs only in halogen content and whisker test certification.
Availability
TPSMB20AHE3/5BT is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom power supply input circuits requiring stable component supply, AEC-Q101 qualification, and long-term lifecycle continuity.
Supply support for TPSMB20AHE3/5BT 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The TPSMB20AHE3/5BT belongs to Vishay's PAR® TVS family, engineered specifically for high-temperature stability and repeatable clamping performance in harsh-environment electronics - targeting under-hood automotive, industrial automation, and infrastructure power systems.
FAQ
What is the maximum operating junction temperature for TPSMB20AHE3/5BT?
The TPSMB20AHE3/5BT has a maximum junction temperature (TJ) rating of +185 °C, validated per AEC-Q101 stress tests. This allows continuous operation in high-ambient environments such as automotive engine compartments or sealed industrial enclosures. Derating begins above 25 °C ambient, with pulse power reduced linearly per Figure 2 in the official Vishay datasheet Document Number 88406. The TPSMB20AHE3/5BT maintains specified VBR and VC performance across its full temperature range.
Is TPSMB20AHE3/5BT AEC-Q101 qualified?
Yes, TPSMB20AHE3/5BT is AEC-Q101 qualified - confirmed in the Vishay datasheet revision 23-Jan-2024 (Document Number 88406), Section "FEATURES". The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction. Qualification covers temperature cycling, high-temperature operating life, and mechanical shock testing required for automotive electronics. This makes TPSMB20AHE3/5BT suitable for use in engine control units, body control modules, and ADAS power supplies.
What is the clamping voltage of TPSMB20AHE3/5BT at its rated peak pulse current?
The TPSMB20AHE3/5BT exhibits a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current (IPPM) of 18.2 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and appears in the Electrical Characteristics table on page 2 of the Vishay datasheet. The low VC relative to VBR (clamping ratio = 1.385) ensures effective protection of 24 V-rated ICs without overvoltage stress.
Does TPSMB20AHE3/5BT have a bidirectional configuration option?
No, TPSMB20AHE3/5BT is unidirectional only - explicitly stated in the Vishay datasheet "FEATURES" section. It conducts only when the cathode is positive relative to the anode, making it suitable for DC rail protection where polarity is fixed. For bidirectional transient suppression (e.g., AC lines or differential data buses), engineers must select a dedicated bidirectional variant such as TPSMB20CA or use two unidirectional devices in series opposition - neither of which applies to the TPSMB20AHE3/5BT part number.
What is the mounting pad layout recommendation for TPSMB20AHE3/5BT?
Vishay specifies a 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area at each terminal for optimal thermal dissipation and surge current handling - detailed in the "MAXIMUM RATINGS" note (2) and Package Outline Dimensions drawing on page 4 of the datasheet. Pad dimensions must accommodate the SMB (DO-214AA) outline: 4.57 mm length, 3.94 mm width, and 2.20 mm height. The TPSMB20AHE3/5BT achieves rated 600 W pulse power only when mounted per these guidelines.
TPSMB20AHE3/5BT 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):
- 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 (SMBJ)
TPSMB20AHE3/5BT FAQ
1.How can I place an order for TPSMB20AHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB20AHE3/5BT 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 TPSMB20AHE3/5BT reliable?
The price and inventory of TPSMB20AHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB20AHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB20AHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB20AHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB20AHE3/5BT?
TPSMB20AHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB20AHE3/5BT 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 TPSMB20AHE3/5BT?
For technical support, including TPSMB20AHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB20AHE3/5BT requirements.
6.How does Aetrix verify that TPSMB20AHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB20AHE3/5BT 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 TPSMB20AHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB20AHE3/5BT?
All TPSMB20AHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB20AHE3/5BT, 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 TPSMB20AHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB20AHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB20AHE3/5BT Tags
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