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Vishay General Semiconductor - Diodes Division TPSMB12AHM3_A/H
- Part No.:
- TPSMB12AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB12AHM3_A/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,365
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Product details
Overview
TPSMB12AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V maximum working voltage (VWM), 16.7 V clamping voltage (VC) at 35.9 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - enabling use in automotive engine control units and industrial motor drives.
For engineers reviewing the TPSMB12AHM3_A/H datasheet, TPSMB12AHM3_A/H pinout, TPSMB12AHM3_A/H application, or TPSMB12AHM3_A/H equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package dimensions, cathode/anode terminal mapping, AEC-Q101 qualification status, and real-world protection scenarios for automotive-grade power rail hardening.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation, delivering stable clamping performance under high-temperature stress (TJ = 185 °C). Its unidirectional polarity and low incremental surge resistance ensure fast response (<1 ns) and minimal overshoot during 10/1000 µs transients.
The device meets MSL Level 1 per J-STD-020 (260 °C reflow peak), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirmed by the HM3 suffix and ordering code structure in Vishay's documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V at 1 mA - defines precise voltage threshold where avalanche conduction begins, critical for matching system overvoltage tolerance |
| VWM | 10.2 V - maximum continuous reverse operating voltage; must exceed normal circuit rail voltage to prevent leakage or false triggering |
| VC @ IPPM | 16.7 V at 35.9 A - clamped voltage seen by protected IC/MOSFET during worst-case surge; determines downstream component voltage rating margin |
| PPPM | 600 W (10/1000 µs) - energy-handling capacity for repetitive surge events; supports automotive load-dump and ISO 7637-2 pulse 1/2a compliance |
| TJ max | +185 °C - enables placement near hot components (e.g., power MOSFETs, DC-DC inductors) without derating loss or reliability risk |
| Package | SMB (DO-214AA) - industry-standard SMD outline with 0.205" × 0.220" footprint; compatible with automated pick-and-place and standard reflow profiles |
| AEC-Q101 | Qualified - validated for automotive underhood applications including engine control modules, body controllers, and ADAS power supplies |
Pinout & Package
TPSMB12AHM3_A/H is housed in the SMB (DO-214AA) surface-mount package, featuring a molded plastic body with matte tin-plated leads. The cathode is marked by a color band on the case end; polarity is non-reversible due to unidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., 12 V rail); conducts avalanche current to ground during overvoltage events |
| Anode | Reference/ground return | Typically tied to system ground plane; completes current path during clamping; requires low-inductance layout for effective transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| 185 °C junction rating | Enables direct placement on high-temperature PCB zones (e.g., near power converters) without thermal derating or heatsinking |
| 600 W peak pulse power (10/1000 µs) | Handles automotive load-dump pulses (ISO 16750-2) and inductive switch-off spikes without degradation over 1000+ cycles |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive underhood environments including temperature cycling, humidity bias, and mechanical shock per AEC test plan |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream components - critical for protecting 16 V-rated CAN transceivers or 20 V logic ICs |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life and standard reflow processing without baking, reducing manufacturing complexity and cost |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input capacitor to clamp surges before they reach LDOs or microcontrollers. Use Value: Maintains VC ≤ 16.7 V during 35.9 A surge, preventing latch-up or gate oxide damage in downstream 20 V-rated power management ICs. |
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS installed at connector interface to shunt fast transients (<1 ns rise time) before reaching ADC front-end. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amps or SAR ADCs experience destructive overvoltage. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Clamping |
|
Use Scenario: Safeguarding PoE-powered equipment inputs against induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input stage, coordinated with upstream fuse and secondary-side TVS for staged protection. Use Value: 600 W rating sustains repeated 10/1000 µs surges per ITU-T K.20/21, meeting telecom infrastructure reliability requirements. |
Use Scenario: Preventing overvoltage damage to USB-C PD controller ICs during adapter plug/unplug events or output short-circuit recovery. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated 5–20 V output rail, absorbing inductive kickback from output filter inductors. Use Value: 10.2 V VWM allows safe operation across full USB PD profile range while clamping to 16.7 V during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, 12 V VBR, but rated for 400 W PPPM; no AEC-Q101 qualification; higher VC (20.1 V) | Not suitable for automotive underhood use; acceptable for commercial-grade industrial or consumer power supplies | Select SMAJ12A only if AEC-Q101 is not required and system can tolerate higher clamping voltage. |
| TPSMB12AHE3_A/H | Identical electrical specs and SMB package; differs only in plating: HE3 = RoHS + AEC-Q101, HM3 = RoHS + AEC-Q101 + halogen-free | No functional difference; HM3 required where halogen-free compliance is mandated (e.g., EU automotive Tier 1 supply chain) | Choose TPSMB12AHE3_A/H for general AEC-Q101 compliance; choose TPSMB12AHM3_A/H when halogen-free material declaration is contractually required. |
Compared with SMAJ12A and TPSMB12AHE3_A/H, the TPSMB12AHM3_A/H provides identical surge protection performance with mandatory halogen-free construction and full AEC-Q101 validation - making it the sole choice for Tier 1 automotive designs requiring both environmental and reliability certification.
Availability
TPSMB12AHM3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and telecom DC power inputs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for TPSMB12AHM3_A/H 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 TPSMB series belongs to Vishay's PAR® (Protected Avalanche Rectifier) family, engineered specifically for robust transient suppression in harsh environments - emphasizing high-temperature stability, repeatable clamping, and automotive qualification from design inception.
FAQ
What is the exact breakdown voltage range for TPSMB12AHM3_A/H?
The TPSMB12AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 11.4 V to 12.6 V at 1 mA test current, as specified in Vishay's official datasheet (Document Number: 88406, Rev. 23-Jan-2024). This tight tolerance ensures predictable clamping onset and compatibility with 12 V nominal systems requiring ±5 % overvoltage margin. The nominal VBR is 12.0 V.
Is TPSMB12AHM3_A/H qualified for automotive applications?
Yes, TPSMB12AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and explicit listing in Vishay's automotive-grade ordering matrix. It undergoes full stress testing per AEC-Q101 including temperature cycling, HTRB, and mechanical shock - making it suitable for engine control, body electronics, and ADAS power domains where reliability at 185 °C junction temperature is mandatory.
What does the 'HM3' suffix mean in TPSMB12AHM3_A/H?
The 'HM3' suffix in TPSMB12AHM3_A/H indicates halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. Unlike the HE3 variant, HM3 meets strict halogen-free material declarations (≤900 ppm bromine, ≤900 ppm chlorine) required by major automotive OEMs and EU environmental regulations - while maintaining identical electrical performance and SMB packaging.
What is the clamping voltage of TPSMB12AHM3_A/H at its rated peak pulse current?
The TPSMB12AHM3_A/H clamps to a maximum of 16.7 V at its rated peak pulse current of 35.9 A (10/1000 µs waveform), per Vishay's datasheet Table on page 2. This VC value is measured under standardized surge conditions and defines the maximum voltage imposed on protected circuitry during worst-case transient events.
Can TPSMB12AHM3_A/H replace TPSMB12AHE3_A/H in a design?
Yes, TPSMB12AHM3_A/H is a direct replacement for TPSMB12AHE3_A/H in terms of electrical performance, package, and AEC-Q101 qualification - the only difference is halogen-free material content. No PCB or schematic changes are needed; however, HM3 should be selected only when halogen-free compliance is contractually required by the end customer or regulatory authority.
TPSMB12AHM3_A/H 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):
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
TPSMB12AHM3_A/H FAQ
1.How can I place an order for TPSMB12AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB12AHM3_A/H 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 TPSMB12AHM3_A/H reliable?
The price and inventory of TPSMB12AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB12AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB12AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB12AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB12AHM3_A/H?
TPSMB12AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB12AHM3_A/H 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 TPSMB12AHM3_A/H?
For technical support, including TPSMB12AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB12AHM3_A/H requirements.
6.How does Aetrix verify that TPSMB12AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB12AHM3_A/H 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 TPSMB12AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB12AHM3_A/H?
All TPSMB12AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB12AHM3_A/H, 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 TPSMB12AHM3_A/H part is unused and in its original packaging.
Return procedure for TPSMB12AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB12AHM3_A/H Tags
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Diodes Incorporated
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Diodes Incorporated
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