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Vishay General Semiconductor - Diodes Division TPSMB12HE3/5BT
- Part No.:
- TPSMB12HE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB12HE3/5BT.pdf
- Description:
- TVS DIODE 9.72VWM 17.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
TPSMB12HE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching and lightning-induced transients on power rails and signal lines. It features 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), 16.7 V clamping voltage (VC) at 35.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the TPSMB12HE3/5BT datasheet, TPSMB12HE3/5BT pinout, TPSMB12HE3/5BT application, or TPSMB12HE3/5BT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal derating behavior, SMB package mechanical dimensions, and real-world clamping performance data required for robust overvoltage design in high-reliability embedded systems.
Technical Context
The TPSMB12HE3/5BT operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its junction passivated anisotropic rectifier structure ensures stable VBR drift of +0.070 %/°C and enables reliable operation up to TJ = 185 °C - critical for under-hood automotive environments.
It responds within <1 ns to transient events and maintains low incremental surge resistance during 10/1000 µs surges, delivering consistent clamping at 16.7 V even at 35.9 A IPPM. The device is rated for 75 A non-repetitive forward surge (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V at 1 mA - defines precise turn-on threshold for overvoltage detection and clamping initiation |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 2 µA, ensuring no false triggering in nominal 12 V systems |
| VC @ IPPM | 16.7 V at 35.9 A - clamped voltage seen by protected IC/MOSFET during worst-case transient, limiting stress below safe thresholds |
| PPPM | 600 W (10/1000 µs) - energy-handling capacity sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges |
| TJ max | +185 °C - supports placement near hot components (e.g., power MOSFETs, DC/DC converters) without derating loss |
| Package | SMB (DO-214AA) - industry-standard SMD outline with 5.59 mm × 4.06 mm footprint and 2.44 mm height, compatible with automated assembly |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, RoHS-compliant and whisker-tested (JESD 201 Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR, defining clamping polarity |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes conduction path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier technology | Enables stable VBR drift (+0.070 %/°C) and repeatable clamping across -65 °C to +185 °C operating range |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in 12 V automotive power nets and industrial motor drives without degradation |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow soldering without moisture-related popcorning or delamination risks |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients, reducing stress on downstream silicon like microcontrollers and CAN transceivers |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 12 V. Use Value: Limits voltage to ≤16.7 V during 35.9 A transients, preventing damage to 36 V-rated LDOs and MCU power inputs. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to absorb ESD (IEC 61000-4-2) and inductive kickback from nearby solenoids. Use Value: Clamps transients within <1 ns while maintaining <1 µA leakage at 10.2 V, preserving signal integrity and measurement accuracy. |
| Telecom Power Input Stage | Consumer Device USB Port Protection |
Use Scenario: Front-end surge suppression for PoE-powered network switches handling IEEE 802.3af/at transients. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input, coordinated with upstream GDT or MOV. Use Value: Absorbs 600 W pulses without thermal runaway, enabling compact layout with minimal heatsinking due to 185 °C TJ rating. | Use Scenario: Overvoltage protection for USB VBUS line in portable audio devices exposed to accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Standoff-rated TVS that remains non-conductive below 10.2 V but clamps hard above 12 V. Use Value: Prevents latch-up in USB controller ICs by limiting VBUS to 16.7 V, meeting USB-IF VBUS tolerance requirements. |
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 industrial/commercial designs where AEC compliance is not mandated | Select SMBJ12A for cost-sensitive non-automotive applications requiring identical clamping performance without qualification overhead |
| TPSMB12AHM3/5BT | Identical electrical specs and AEC-Q101 qualification, but halogen-free molding compound and JESD 201 Class 2 whisker test compliance | Required for RoHS+halogen-free mandates (e.g., EU automotive Tier 1 programs); same thermal and surge performance | Choose TPSMB12AHM3/5BT when material compliance (halogen-free, whisker-safe) is contractually required alongside AEC-Q101 |
Compared with SMBJ12A and TPSMB12AHM3/5BT, the TPSMB12HE3/5BT provides AEC-Q101 qualification and RoHS compliance in a standard matte-tin finish - making it the default choice for automotive designs where halogen-free content is not mandated but automotive reliability validation is essential.
Availability
TPSMB12HE3/5BT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom power input surge suppression requiring stable component supply across long production lifecycles.
Supply support for TPSMB12HE3/5BT 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-grade solutions.
The TPSMB series was engineered specifically for demanding transient suppression in automotive and industrial environments, combining high-temperature junction capability (185 °C), AEC-Q101 qualification, and robust 600 W surge handling in the compact SMB package.
FAQ
What is the breakdown voltage tolerance of the TPSMB12HE3/5BT?
The TPSMB12HE3/5BT has a guaranteed breakdown voltage range of 11.4 V to 12.6 V at 1 mA test current, corresponding to ±5 % tolerance around the nominal 12 V rating. This tight VBR window ensures predictable clamping onset in 12 V systems and aligns with automotive voltage rail specifications. The TPSMB12HE3/5BT's VBR drift coefficient is +0.070 %/°C, allowing accurate thermal compensation in high-temperature deployments.
Is the TPSMB12HE3/5BT AEC-Q101 qualified?
Yes, the TPSMB12HE3/5BT is fully 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 ESD, validating the TPSMB12HE3/5BT for use in automotive powertrain, body, and ADAS modules where reliability is mission-critical.
What is the maximum clamping voltage of the TPSMB12HE3/5BT under surge conditions?
The TPSMB12HE3/5BT exhibits a maximum clamping voltage (VC) of 16.7 V at its rated peak pulse current (IPPM) of 35.9 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the worst-case voltage imposed on protected circuitry during a full-power transient. The TPSMB12HE3/5BT maintains this clamping performance across its full operating temperature range (-65 °C to +185 °C).
Can the TPSMB12HE3/5BT be used in bidirectional configurations?
No, the TPSMB12HE3/5BT is unidirectional only, as explicitly stated in Vishay's datasheet. Its internal structure supports conduction only from cathode to anode during reverse overvoltage events. For bidirectional protection (e.g., AC lines or differential signals), two TPSMB12HE3/5BT devices must be connected in series opposition, or a dedicated bidirectional TVS such as SMBJ12CA should be selected instead of the TPSMB12HE3/5BT.
What is the thermal derating behavior of the TPSMB12HE3/5BT above 25 °C ambient?
The TPSMB12HE3/5BT follows Vishay's standardized derating curve (Fig. 2 in datasheet 88406): peak pulse power drops linearly from 100 % at 25 °C to ~50 % at 125 °C ambient, with full derating to zero at 175 °C. This behavior is directly tied to its 185 °C maximum junction temperature rating. Designers must apply this derating when sizing PCB copper pads (0.2" × 0.2" recommended) and estimating worst-case clamping performance in high-ambient environments - a key consideration for the TPSMB12HE3/5BT in under-hood applications.
TPSMB12HE3/5BT 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):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 34.7A
- 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)
TPSMB12HE3/5BT FAQ
1.How can I place an order for TPSMB12HE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB12HE3/5BT 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 TPSMB12HE3/5BT reliable?
The price and inventory of TPSMB12HE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB12HE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB12HE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB12HE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB12HE3/5BT?
TPSMB12HE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB12HE3/5BT 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 TPSMB12HE3/5BT?
For technical support, including TPSMB12HE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB12HE3/5BT requirements.
6.How does Aetrix verify that TPSMB12HE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB12HE3/5BT 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 TPSMB12HE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB12HE3/5BT?
All TPSMB12HE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB12HE3/5BT, 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 TPSMB12HE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB12HE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB12HE3/5BT Tags
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