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Vishay General Semiconductor - Diodes Division TPSMA12AHE3_A/I
- Part No.:
- TPSMA12AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12AHE3_A/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,030
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Product details
Overview
TPSMA12AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 12.0 V nominal breakdown voltage (VBR), 10.2 V stand-off voltage (VWM), 24.0 A peak pulse current (IPPM), 16.7 V maximum clamping voltage (VC) at IPPM, and 400 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and rated for TJ = 185 °C, targeting automotive and industrial electronics protection.
For engineers reviewing the TPSMA12AHE3_A/I datasheet, TPSMA12AHE3_A/I pinout, TPSMA12AHE3_A/I application, or TPSMA12AHE3_A/I equivalent, this page delivers verified electrical parameters, thermal reliability data, polarity configuration, PCB mounting guidance, and direct alternatives for ESD/surge protection design-in.
Technical Context
The TPSMA12AHE3_A/I operates as a unidirectional avalanche diode with passivated anisotropic rectifier technology, enabling fast response to transient overvoltage events. Its junction temperature rating of 185 °C supports operation in high-reliability automotive under-hood environments and industrial control cabinets where ambient temperatures exceed 125 °C.
It delivers 400 W peak pulse power per 10/1000 µs waveform with 0.01 % duty cycle, and exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.39), critical for protecting downstream MOSFETs and ICs from inductive switching spikes and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.40 / 12.0 / 12.60 V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 10.20 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 16.7 V - clamped voltage during 24.0 A transient, limiting stress on protected circuitry |
| IPPM | 24.0 A - peak surge current capability under standardized 10/1000 µs waveform |
| PPPM | 400 W - transient energy absorption capacity without failure |
| TJ max. | 185 °C - enables use in high-temperature automotive and industrial applications without derating |
| Polarity | Unidirectional - cathode-banded configuration for DC line protection only (not AC or bidirectional) |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow), RoHS-compliant and AEC-Q101 qualified. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Cathode of internal avalanche junction | Typically tied to system ground; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR performance and low leakage (<1 µA at VWM) across temperature and lifetime |
| 185 °C junction rating | Supports uninterrupted operation in engine control units (ECUs), motor drives, and industrial PLCs without thermal shutdown |
| 400 W peak pulse power (10/1000 µs) | Absorbs high-energy transients from relay coil flyback or load dump without degradation |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| Low clamping voltage (16.7 V @ 24 A) | Provides tighter voltage margin between VC and IC absolute maximum ratings, reducing risk of latch-up or damage |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from ISO 7637-2 load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp transients above 12 V. Use Value: Withstands 400 W surges and maintains VC ≤ 16.7 V, ensuring downstream regulators and microcontrollers remain within safe operating limits. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from EMI and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS mounted at connector interface to suppress sub-100 ns ESD pulses. Use Value: Delivers <1 µA leakage at 10.2 V and fast response time, preserving signal integrity while meeting IEC 61000-4-2 Level 4 (15 kV air) requirements. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Safeguarding primary-side controllers and bridge rectifiers in wall adapters against lightning-induced surges on AC input lines. IC Role / Device Role / Timing Role: Mounted after fuse and before bridge rectifier to absorb differential-mode transients. Use Value: 185 °C rating allows placement near heat-generating components; 24 A IPPM handles 1.2/50 µs surges per IEC 61000-4-5. | Use Scenario: Protecting -48 V DC telecom power distribution boards from hot-swap transients and accidental short-circuit recovery spikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48 V rail and return, clamping positive-going transients to ground. Use Value: Stable VBR tolerance (±5 %) ensures predictable clamping across production lots; RoHS + halogen-free compliance meets GR-1089-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMA package, 12 V VBR, but lower PPPM = 400 W (same), non-AEC-Q101 qualified, higher VC = 19.9 V | Not suitable for automotive under-hood use; acceptable for commercial-grade industrial or consumer applications | Select SMAJ12A only if AEC-Q101 qualification and 16.7 V clamping are not required. |
| SMCJ12A | Larger SMC (DO-214AB) package, same VBR, higher PPPM = 1500 W, VC = 19.9 V, AEC-Q101 available in HE3 variant | Requires larger PCB footprint; used where higher surge immunity (e.g., 10/1000 µs >100 A) is needed | Choose SMCJ12A when system-level surge test levels exceed 400 W or layout allows larger package. |
Compared with SMAJ12A and SMCJ12A, the TPSMA12AHE3_A/I uniquely combines AEC-Q101 qualification, 16.7 V clamping, and SMA footprint-enabling compact, automotive-grade transient suppression without sacrificing surge margin or thermal robustness.
Availability
TPSMA12AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeds requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for TPSMA12AHE3_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 reliability, thermal performance, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Avalanche Rectifier) transient voltage suppressor product line, engineered specifically for high-temperature, high-reliability protection of sensitive electronics in automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for TPSMA12AHE3_A/I?
The TPSMA12AHE3_A/I has a nominal breakdown voltage (VBR) of 12.0 V, with a guaranteed range of 11.40 V (min) to 12.60 V (max) at 1.0 mA test current. This ±5 % tolerance ensures consistent clamping behavior across production lots and supports robust design margins for 12 V system protection.
Is TPSMA12AHE3_A/I suitable for automotive applications?
Yes, TPSMA12AHE3_A/I is AEC-Q101 qualified and rated for TJ = 185 °C, making it suitable for automotive applications including engine control units, body electronics, and infotainment power supplies. Its HE3 suffix confirms RoHS compliance and automotive qualification per the Vishay ordering matrix.
What is the maximum clamping voltage of TPSMA12AHE3_A/I at rated surge current?
The maximum clamping voltage (VC) of TPSMA12AHE3_A/I is 16.7 V at 24.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream ICs see limited overvoltage during transient events.
Does TPSMA12AHE3_A/I have bidirectional capability?
No, TPSMA12AHE3_A/I is unidirectional only. Its cathode band indicates polarity, and it conducts only when the cathode is more positive than the anode by ≥VBR. For AC or bidirectional protection, a separate part number (e.g., TPSMA12CA) would be required.
What is the thermal resistance (RθJA) of TPSMA12AHE3_A/I in standard PCB layout?
Vishay specifies thermal performance based on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. While RθJA is not explicitly listed for TPSMA12AHE3_A/I, the 1.0 W steady-state power dissipation (PD) and 185 °C TJ max imply RθJA ≈ 185 K/W under those conditions-enabling reliable operation up to +125 °C ambient with appropriate copper area.
TPSMA12AHE3_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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA12AHE3_A/I FAQ
1.How can I place an order for TPSMA12AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12AHE3_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 TPSMA12AHE3_A/I reliable?
The price and inventory of TPSMA12AHE3_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 TPSMA12AHE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMA12AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12AHE3_A/I?
TPSMA12AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12AHE3_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 TPSMA12AHE3_A/I?
For technical support, including TPSMA12AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12AHE3_A/I requirements.
6.How does Aetrix verify that TPSMA12AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMA12AHE3_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 TPSMA12AHE3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMA12AHE3_A/I?
All TPSMA12AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12AHE3_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 TPSMA12AHE3_A/I part is unused and in its original packaging.
Return procedure for TPSMA12AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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