My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMA12HE3_A/I
- Part No.:
- TPSMA12HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12HE3_A/I.pdf
- Description:
- TVS DIODE 9.72VWM 17.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,478
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMA12HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 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), 1.0 W steady-state power dissipation, and operates up to +185 °C junction temperature - used in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA12HE3_A/I datasheet, TPSMA12HE3_A/I pinout, TPSMA12HE3_A/I application, or TPSMA12HE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C capability, 24.0 V clamping performance at rated IPPM, and SMA package compatibility with high-reliability PCB layouts requiring MSL Level 1 reflow.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional architecture provides robust clamping during positive-going transients while blocking reverse leakage below 10.2 V stand-off voltage (VWM) at 25 °C.
The device delivers fast response time and excellent clamping ratio (VC/VBR ≈ 2.0) under 10/1000 µs surge conditions. It meets JESD201 Class 2 whisker testing and is qualified to AEC-Q101, supporting automotive-grade deployment without derating below +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.40 / 12.0 / 12.60 V - ensures reliable turn-on above 11.4 V while maintaining margin against normal operating voltage fluctuations |
| VWM | 10.20 V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit DC bias |
| VC @ IPPM | 24.0 V at 5.0 A - clamps transient energy to safe levels for downstream 24 V-rated ICs and MOSFETs |
| PPPM | 400 W (10/1000 µs) - handles typical lightning-induced surges and inductive switch-off spikes in automotive and industrial environments |
| TJ max. | +185 °C - enables operation in under-hood automotive locations and high-power industrial enclosures without thermal derating |
| Polarity | Unidirectional - protects against positive transients only; requires external design consideration for bidirectional threat scenarios |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads compliant with J-STD-002 |
Pinout & Package
SMA (DO-214AC) package with axial lead configuration: cathode indicated by color band; terminals are non-polarized metallurgically but functionally asymmetric due to unidirectional conduction path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts during overvoltage events to shunt current to ground or return path |
| Anode (non-banded end) | Cathode of internal PN junction | Typically tied to system ground or lower-potential rail; completes clamping path during transient |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces surface leakage and enhances long-term reliability under humid, high-bias stress conditions |
| TJ = 185 °C capability | Supports uninterrupted operation in engine control units, motor drives, and industrial PLCs without thermal shutdown |
| 400 W peak pulse power (10/1000 µs) | Withstands repetitive surge events per 0.01 % duty cycle - suitable for cyclic load switching in automotive actuators |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure risk |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across supply-to-ground or signal-to-ground paths to clamp sub-100 ns spikes. Use Value: Limits voltage excursion to ≤24.0 V during 400 W surges, preserving integrity of 12 V rail and 3.3/5 V logic interfaces. | Use Scenario: Safeguarding 24 V DC input rails in programmable logic controllers and motor drive control boards against inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VIN and GND to absorb energy from relay coil de-energization or solenoid switching. Use Value: Clamps transients within 1 ns response time to prevent latch-up or gate oxide damage in downstream MOSFET drivers. |
| Consumer Device Port Protection | Telecom Line Interface Surge Suppression |
Use Scenario: Shielding USB, HDMI, or Ethernet ports in set-top boxes and smart home hubs from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with differential pairs or power pins to divert ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with minimal parasitic capacitance while limiting post-clamp voltage to safe levels for PHY ICs. | Use Scenario: Front-end protection for DSL or PoE-powered equipment exposed to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Primary clamping device in hybrid protection circuits, coordinated with gas discharge tubes and PTCs. Use Value: Absorbs initial 400 W surge energy before secondary protectors activate, reducing stress on upstream components. |
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 SMA package, 12 V VBR, but rated for 400 W with 1.0 mA test current; no AEC-Q101 qualification stated | Lacks automotive qualification; suitable for commercial/industrial use where AEC compliance is not mandated | Select SMAJ12A when cost sensitivity outweighs automotive qualification requirements and thermal derating to 150 °C is acceptable |
| 1.5SMC12A | Higher 1.5 kW peak power rating, DO-214AB (SMC) package; larger footprint and higher thermal mass | Used in higher-energy surge environments (e.g., AC mains input); incompatible with SMA footprints without layout change | Choose 1.5SMC12A only when system-level surge tests exceed 400 W and board space allows SMC package |
Compared with SMAJ12A and 1.5SMC12A, the TPSMA12HE3_A/I uniquely combines AEC-Q101 qualification, 185 °C operation, and SMA footprint - making it optimal for space-constrained automotive modules where reliability under thermal stress is critical.
Availability
TPSMA12HE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, and telecom line interface surge suppression requiring stable component supply across production lifecycles.
Supply support for TPSMA12HE3_A/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 high-reliability and automotive-grade performance.
The TPSMA12HE3_A/I belongs to Vishay's PAR® series of surface-mount TVS diodes, engineered specifically for high-temperature, high-surge environments in automotive and industrial systems where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the breakdown voltage tolerance for TPSMA12HE3_A/I?
The TPSMA12HE3_A/I has a specified breakdown voltage range of 11.40 V (minimum) to 12.60 V (maximum) at 1.0 mA test current, with 12.0 V as the nominal value. This ±5 % tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 12 V automotive subsystems where overvoltage margins are tightly constrained. The TPSMA12HE3_A/I maintains this specification under full AEC-Q101 qualification testing.
Is TPSMA12HE3_A/I RoHS-compliant and halogen-free?
Yes, the TPSMA12HE3_A/I carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. However, it is not halogen-free; halogen-free versions use the HM3 suffix (e.g., TPSMA12HM3_A/I). The HE3 variant uses standard molding compound meeting UL 94 V-0 flammability rating and matte tin-plated leads solderable per J-STD-002. The TPSMA12HE3_A/I complies fully with EU RoHS Directive 2011/65/EU.
What is the maximum clamping voltage of TPSMA12HE3_A/I and at what current is it measured?
The maximum clamping voltage (VC) of the TPSMA12HE3_A/I is 24.0 V, measured at a peak pulse current (IPPM) of 5.0 A using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is guaranteed across the full operating temperature range. The TPSMA12HE3_A/I achieves this clamping performance while maintaining low dynamic impedance, ensuring effective energy diversion without overstressing downstream components.
Does TPSMA12HE3_A/I support automated optical inspection (AOI) after reflow?
Yes, the TPSMA12HE3_A/I's SMA (DO-214AC) package features a visible cathode band and consistent lead geometry compatible with standard AOI systems. Its matte tin plating provides uniform reflectivity, and the package's defined dimensions (0.208" × 0.157") enable reliable fiducial-based alignment detection. The TPSMA12HE3_A/I is rated MSL Level 1 with 260 °C peak reflow tolerance, ensuring no popcorning or delamination that could interfere with post-reflow inspection accuracy.
Can TPSMA12HE3_A/I be used in bidirectional transient protection circuits?
No, the TPSMA12HE3_A/I is strictly unidirectional and must not be used for bidirectional protection without external circuitry. Its internal structure conducts only during positive transients relative to the cathode terminal. For bidirectional threats (e.g., AC lines or RS-485), two TPSMA12HE3_A/I devices in series-opposing configuration or a dedicated bidirectional TVS like SMAJ12CA would be required. Using a single TPSMA12HE3_A/I in such applications leaves the circuit vulnerable to negative-going surges.
TPSMA12HE3_A/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:
- 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):
- 23.1A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
TPSMA12HE3_A/I FAQ
1.How can I place an order for TPSMA12HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12HE3_A/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 TPSMA12HE3_A/I reliable?
The price and inventory of TPSMA12HE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA12HE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMA12HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12HE3_A/I?
TPSMA12HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12HE3_A/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 TPSMA12HE3_A/I?
For technical support, including TPSMA12HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12HE3_A/I requirements.
6.How does Aetrix verify that TPSMA12HE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMA12HE3_A/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 TPSMA12HE3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMA12HE3_A/I?
All TPSMA12HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12HE3_A/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 TPSMA12HE3_A/I part is unused and in its original packaging.
Return procedure for TPSMA12HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA12HE3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
