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Vishay General Semiconductor - Diodes Division TPSMB12A-1BHE3/5BT
- Part No.:
- TPSMB12A-1BHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB12A-1BHE3/5BT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,523
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Product details
Overview
TPSMB12A-1BHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive and lightning-induced transients on power rails and signal lines. It features a 12 V nominal breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), 16.7 V maximum clamping voltage (VC) at 35.9 A peak pulse current, and 600 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive sensor protection, industrial I/O interfaces, and DC power input stages.
For engineers reviewing the TPSMB12A-1BHE3/5BT datasheet, TPSMB12A-1BHE3/5BT pinout, TPSMB12A-1BHE3/5BT application, or TPSMB12A-1BHE3/5BT equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 185 °C junction rating, SMB (DO-214AA) package compatibility with high-reliability reflow profiles, and verified clamping performance under repetitive surge conditions up to 0.01% duty cycle.
Technical Context
The TPSMB12A-1BHE3/5BT operates as a unidirectional avalanche diode with passivated anisotropic rectifier technology, enabling stable breakdown behavior across -65 °C to +185 °C operating temperature range. Its 0.070 %/°C temperature coefficient of VBR ensures predictable voltage shift under thermal stress, critical for automotive under-hood applications.
It delivers 35.9 A peak pulse current (IPPM) at 16.7 V clamping voltage under standardized 10/1000 µs surge, with low incremental surge resistance and sub-nanosecond response time - optimized for protecting MOSFET gates, microcontroller I/O pins, and analog front-ends against ESD and load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V at 1 mA - defines precise avalanche onset for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse working voltage before leakage exceeds 2 µA |
| VC @ IPPM | 16.7 V at 35.9 A - clamping voltage limiting downstream component stress during surge |
| PPPM | 600 W (10/1000 µs) - peak transient energy absorption capacity without failure |
| TJ max. | +185 °C - enables operation in high-temperature environments including engine control units |
| IFSM | 75 A (8.3 ms half-sine) - withstands high-energy non-repetitive forward surges like battery reverse polarity |
| Polarity | Unidirectional - cathode-banded configuration for DC rail protection only |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), RoHS-compliant and AEC-Q101 qualified. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Current exit terminal under forward bias; avalanche conduction terminal under reverse surge | Connected to protected line (e.g., 12 V rail or signal trace); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| 185 °C junction rating | Supports placement near heat sources (e.g., power converters) without derating penalties |
| 600 W peak pulse power | Handles ISO 7637-2 Pulse 1/2a/5a transients and IEC 61000-4-5 combination wave surges |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage margin required for protected ICs, reducing design safety overhead |
| MSL Level 1 compliance | Enables direct placement into standard SMT assembly without baking or special handling |
Applications
| Automotive Sensor Protection | Industrial DC Power Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors in engine control modules from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between sensor supply rail and chassis ground. Use Value: Limits transient voltage to ≤16.7 V during 35.9 A surges, preventing latch-up or gate oxide damage in 5 V/12 V interface ICs. | Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives against 400 V surge events on 24 V auxiliary power inputs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage upstream of DC-DC converter and EMI filter. Use Value: Absorbs 600 W peak energy within 1 ms, maintaining system uptime without fuse activation or shutdown. |
| Consumer Power Adapter Output | Telecom Line Interface |
Use Scenario: Secondary-side surge suppression on USB-C PD and AC/DC adapter outputs exposed to user-handled cables. IC Role / Device Role / Timing Role: Final-stage transient limiter between output capacitor and connector pins. Use Value: Clamps fast-rising ESD (IEC 61000-4-2) and cable discharge events to <17 V, preserving USB-PD controller integrity. | Use Scenario: Protection of Ethernet PHYs and PoE injectors against induced surges on RJ45 data lines in outdoor base stations. IC Role / Device Role / Timing Role: Bidirectionally paired (with complementary device) or used in unidirectional rail clamp configuration. Use Value: Withstands repetitive 10/1000 µs surges up to 0.01% duty cycle while maintaining <2 µA leakage at 10.2 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same SMB package, identical VBR (11.4–12.6 V), but rated for 600 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| TPSMB12CA | Bi-directional variant with same VBR, VC, and PPPM; includes symmetrical clamping for AC-coupled or floating signal lines | Required for differential or bipolar signal protection (e.g., RS-485, audio lines); not interchangeable in unidirectional DC rail roles | Choose only when bidirectional clamping is mandated by circuit topology or signal swing requirements |
Compared with SMBJ12A and TPSMB12CA, the TPSMB12A-1BHE3/5BT uniquely combines AEC-Q101 qualification, 185 °C operation, and unidirectional clamping in SMB format - making it the preferred choice for automotive power domain protection where reliability and thermal margin are non-negotiable.
Availability
TPSMB12A-1BHE3/5BT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power inputs, and telecom line interface designs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for TPSMB12A-1BHE3/5BT 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The TPSMB12A-1BHE3/5BT belongs to Vishay's PAR® (Protection and Regulation) family of transient voltage suppressors, engineered specifically for robust, high-temperature-stable clamping in harsh automotive and industrial environments.
FAQ
What is the exact breakdown voltage tolerance of the TPSMB12A-1BHE3/5BT?
The TPSMB12A-1BHE3/5BT has a guaranteed breakdown voltage (VBR) range of 11.4 V to 12.6 V at 1 mA test current, with a nominal value of 12.0 V. This ±5% tolerance is specified per the Vishay datasheet revision 23-Jan-2024 (Document Number: 88406), ensuring consistent clamping behavior across production lots and temperature extremes up to 185 °C.
Is the TPSMB12A-1BHE3/5BT compatible with lead-free reflow soldering processes?
Yes, the TPSMB12A-1BHE3/5BT is fully compatible with lead-free reflow soldering. It meets MSL Level 1 per J-STD-020 with a maximum peak temperature of 260 °C, and its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards - eliminating need for pre-baking or special handling in standard SMT lines.
Does the TPSMB12A-1BHE3/5BT meet AEC-Q101 requirements?
Yes, the TPSMB12A-1BHE3/5BT is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet under "FEATURES" and "ORDERING INFORMATION". The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction, validated for automotive applications including engine control, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of the TPSMB12A-1BHE3/5BT under surge conditions?
The TPSMB12A-1BHE3/5BT exhibits a maximum clamping voltage (VC) of 16.7 V at 35.9 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events.
Can the TPSMB12A-1BHE3/5BT be used in bidirectional signal protection?
No, the TPSMB12A-1BHE3/5BT is strictly unidirectional and must not be used for bidirectional signal protection. Its cathode-anode polarity is fixed, and it conducts only during reverse-biased surges. For AC or differential lines (e.g., RS-485, USB D+/D−), the bi-directional variant TPSMB12CA - not the TPSMB12A-1BHE3/5BT - is required.
TPSMB12A-1BHE3/5BT 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 35.9A
- 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)
TPSMB12A-1BHE3/5BT FAQ
1.How can I place an order for TPSMB12A-1BHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB12A-1BHE3/5BT 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 TPSMB12A-1BHE3/5BT reliable?
The price and inventory of TPSMB12A-1BHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB12A-1BHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB12A-1BHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB12A-1BHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB12A-1BHE3/5BT?
TPSMB12A-1BHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB12A-1BHE3/5BT 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 TPSMB12A-1BHE3/5BT?
For technical support, including TPSMB12A-1BHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB12A-1BHE3/5BT requirements.
6.How does Aetrix verify that TPSMB12A-1BHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB12A-1BHE3/5BT 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 TPSMB12A-1BHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB12A-1BHE3/5BT?
All TPSMB12A-1BHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB12A-1BHE3/5BT, 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 TPSMB12A-1BHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB12A-1BHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB12A-1BHE3/5BT Tags
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