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Vishay General Semiconductor - Diodes Division TPSMA12AHM3_B/I
- Part No.:
- TPSMA12AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12AHM3_B/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,391
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Product details
Overview
TPSMA12AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive-switching and lightning-induced transients on power rails and signal lines. It features 12.0 V nominal breakdown voltage (VBR), 24.0 V maximum clamping voltage (VC) at 5.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), 185 °C maximum junction temperature, and SMA (DO-214AC) package - deployed in automotive sensor power protection and industrial I/O interface circuits.
For engineers reviewing the TPSMA12AHM3_B/I datasheet, TPSMA12AHM3_B/I pinout, TPSMA12AHM3_B/I application, or TPSMA12AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, thermal derating above 25 °C, and compatibility with J-STD-020 MSL Level 1 reflow profiles.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds its 11.4–12.6 V breakdown range (VBR at 1.0 mA). Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients without affecting normal operation.
Designed for high-reliability environments, the TPSMA12AHM3_B/I supports continuous operation up to 185 °C junction temperature and meets AEC-Q101 stress testing requirements. Its halogen-free, RoHS-compliant construction and matte tin-plated terminals comply with JESD 22-B102 solderability and JESD 201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 V / 12.0 V / 12.6 V at 1.0 mA - defines precise clamping onset threshold for overvoltage events |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 24.0 V at 5.0 A - peak clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak pulse power handling capability under standardized 10/1000 µs waveform |
| TJ max. | 185 °C - enables use in under-hood automotive and high-ambient industrial environments |
| IR @ VWM | 1.0 µA - ultra-low reverse leakage ensures minimal standby power loss in battery-powered systems |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with cathode band marking; terminals are matte tin plated, compliant with J-STD-002 solderability and JESD 22-B102 wetting balance testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient conduction path anode-to-cathode during overvoltage | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference node / return path | Typically tied to system ground or lower-potential rail; completes clamping current loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Junction temperature rating | 185 °C continuous operation enables placement near heat sources without derating penalties |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; compatible with standard 260 °C peak reflow profile |
| Low clamping ratio | VC/VBR = 24.0/12.0 = 2.0 - tight voltage margin preserves headroom for downstream logic-level interfaces |
Applications
| Automotive Cabin Sensors | Industrial PLC Digital Inputs |
|---|---|
|
Use Scenario: Protecting LIN bus-connected temperature/humidity sensors from load dump and alternator ripple in vehicle cabin modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply rail and chassis ground to clamp transients below 24.0 V. Use Value: Prevents latch-up or permanent damage to 12 V-rated analog front-end ICs during ISO 7637-2 Pulse 1/2a events. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted directly at terminal block entry point, shunting energy to common ground. Use Value: Maintains functional safety integrity by limiting transient voltage to <24.0 V, ensuring reliable optocoupler triggering and microcontroller input tolerance. |
| Consumer Appliance Motor Drivers | Telecom Power Supply Rails |
|
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to absorb inductive kickback during MOSFET turn-off. Use Value: Eliminates need for snubber RC networks while sustaining 400 W peak pulse handling for repetitive switching cycles. |
Use Scenario: Secondary-side overvoltage protection on 12 V/48 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage clamping element downstream of primary MOVs and filter stages. Use Value: Provides precise 24.0 V clamping ceiling to protect PoE controllers and Ethernet PHYs without false triggering during normal line regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3_A/H | Same VBR (11.4–12.6 V), but SMB package (DO-214AA); 600 W PPPM; higher thermal mass | Better suited for higher-energy transients where PCB space allows larger footprint | Select when surge energy exceeds 400 W and layout permits 4.58 mm × 3.94 mm footprint |
| TPSMA12AHM3_B/H | Identical electrical specs and qualification; differs only in tape-and-reel packaging (1800 pcs vs. 7500 pcs) | No functional or application difference; same thermal, electrical, and mechanical behavior | Choose based on production volume and pick-and-place feeder compatibility |
Compared with SMBJ12AHE3_A/H and TPSMA12AHM3_B/H, the TPSMA12AHM3_B/I offers identical clamping performance and AEC-Q101 qualification in the smaller SMA package, enabling denser layouts while maintaining full compliance with automotive and industrial surge immunity standards.
Availability
TPSMA12AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for TPSMA12AHM3_B/I 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 reliability and application-specific performance.
The TPSMA12AHM3_B/I belongs to Vishay's PAR® family of high-temperature, AEC-Q101-qualified TVS diodes engineered for robust transient suppression in automotive powertrain, body electronics, and industrial control systems.
FAQ
What is the clamping voltage of the TPSMA12AHM3_B/I under a 10/1000 µs surge?
The TPSMA12AHM3_B/I has a maximum clamping voltage (VC) of 24.0 V at 5.0 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88405 and defines the upper voltage limit imposed on protected circuitry during transient events. The TPSMA12AHM3_B/I maintains this clamping performance across its rated junction temperature range.
Is the TPSMA12AHM3_B/I qualified for automotive applications?
Yes, the TPSMA12AHM3_B/I is AEC-Q101 qualified, as confirmed in the "FEATURES" section of Vishay document 88405. Its HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. The TPSMA12AHM3_B/I undergoes stress testing including high-temperature reverse bias, temperature cycling, and mechanical shock per JESD47, making it suitable for automotive cabin and chassis applications.
What is the standoff voltage rating for the TPSMA12AHM3_B/I?
The TPSMA12AHM3_B/I has a maximum working peak reverse voltage (VWM) of 10.2 V, meaning it can safely block up to this DC or RMS voltage in normal operation without significant leakage. At VWM, reverse leakage current is guaranteed ≤1.0 µA at 25 °C and ≤1000 µA at 150 °C. This VWM rating ensures compatibility with 12 V nominal automotive and industrial systems where margin below VBR is required.
Does the TPSMA12AHM3_B/I have a bidirectional configuration option?
No, the TPSMA12AHM3_B/I is unidirectional only, as explicitly stated in the "FEATURES" section of Vishay document 88405. It conducts surge current only in the reverse direction (cathode to anode) when voltage exceeds VBR. For bidirectional protection, engineers must select a different part number from the TPSMA series - such as TPSMA12CA - which is not applicable to the TPSMA12AHM3_B/I.
What is the thermal derating behavior of the TPSMA12AHM3_B/I above 25 °C ambient?
The TPSMA12AHM3_B/I follows the derating curve shown in Figure 2 of Vishay document 88405: peak pulse power decreases linearly from 400 W at 25 °C to zero at 185 °C junction temperature. At 125 °C, it retains approximately 65 % of rated PPPM. This derating applies to both single-pulse and repetitive surge conditions and must be applied using actual junction temperature, not ambient, for accurate design margining.
TPSMA12AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 24A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
TPSMA12AHM3_B/I FAQ
1.How can I place an order for TPSMA12AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12AHM3_B/I 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 TPSMA12AHM3_B/I reliable?
The price and inventory of TPSMA12AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA12AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA12AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12AHM3_B/I?
TPSMA12AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12AHM3_B/I 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 TPSMA12AHM3_B/I?
For technical support, including TPSMA12AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA12AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA12AHM3_B/I 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 TPSMA12AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA12AHM3_B/I?
All TPSMA12AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12AHM3_B/I, 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 TPSMA12AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA12AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA12AHM3_B/I Tags
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