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Vishay General Semiconductor - Diodes Division TPSMA12AHE3_A/H
- Part No.:
- TPSMA12AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12AHE3_A/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,413
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Product details
Overview
TPSMA12AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching transients and lightning-induced surges. 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), 185 °C maximum junction temperature, and SMA (DO-214AC) package - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the TPSMA12AHE3_A/H datasheet, TPSMA12AHE3_A/H pinout, TPSMA12AHE3_A/H application, or TPSMA12AHE3_A/H equivalent, key selection criteria include unidirectional polarity, 10.2 V stand-off voltage (VWM), <1.0 µA reverse leakage at VWM, AEC-Q101 qualification, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS diode operates as a voltage-clamping protection device in parallel with sensitive circuit nodes. Its passivated anisotropic rectifier technology enables fast response time and low incremental surge resistance, while its TJ = 185 °C rating supports high-reliability operation under sustained thermal stress in engine compartments and industrial motor drives.
The device is rated for 400 W peak pulse power per 10/1000 µs waveform at 0.01 % duty cycle and delivers stable clamping performance across -65 °C to +185 °C operating junction temperature range. Its unidirectional configuration ensures forward conduction only during positive overvoltage events on the cathode-biased side.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.40 / 12.0 / 12.60 V - defines precise voltage threshold at which avalanche conduction begins under 1.0 mA test current |
| VWM | 10.20 V - maximum continuous reverse working voltage before significant leakage occurs |
| VC @ IPPM | 24.0 V at 5.0 A - clamped voltage seen by protected circuit during worst-case 400 W transient event |
| PPPM | 400 W - peak pulse power handling capability with standard 10/1000 µs waveform |
| TJ max. | +185 °C - enables use in under-hood automotive and high-temperature industrial environments without derating |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes terminal orientation |
| MSL Level | Level 1 per J-STD-020 - supports lead-free reflow up to 260 °C peak without moisture-related failure |
Pinout & Package
Package: SMA (DO-214AC) - surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and cathode identification via color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient voltage clamp input | Connected to protected line; conducts when line voltage exceeds VBR relative to anode |
| Anode | Reference/return path | Typically tied to ground or low-impedance return plane; completes clamping current path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR and low leakage (<1.0 µA at VWM) across full temperature range |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| 400 W peak pulse power (10/1000 µs) | Withstands repetitive load dump and ISO 7637-2 pulse 5a/b surges without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or relay bounce) |
| TJ = 185 °C capability | Eliminates need for thermal derating in high-ambient environments such as motor controllers and LED drivers |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Suppressing load dump transients on 12 V battery-fed microcontroller supply rails in engine control units (ECUs). IC Role / Device Role / Timing Role: Voltage clamping element placed between VBAT and ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits rail voltage to ≤24.0 V during 400 W pulses, preventing latch-up or permanent damage to 3.3 V/5 V logic ICs. | Use Scenario: Protecting gate driver inputs and feedback signal lines in variable-frequency AC motor inverters. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on isolated analog sensor outputs (e.g., current shunt amplifiers). Use Value: Clamps fast-switching noise and commutation spikes to <24.0 V, preserving ADC accuracy and preventing false fault triggering. |
| Telecom Line Interface Protection | Consumer Sensor Module Surge Hardening |
Use Scenario: Guarding RS-485 transceiver I/O pins against lightning-induced surges on outdoor data links. IC Role / Device Role / Timing Role: Unidirectional TVS placed on each differential line relative to local ground plane. Use Value: Maintains signal integrity by clamping common-mode transients to ≤24.0 V while adding <1 pF junction capacitance at 0 V bias. | Use Scenario: Shielding MEMS accelerometer and temperature sensor outputs in smart home hubs exposed to ESD events. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) clamping diode on analog output traces prior to ADC input. Use Value: Prevents sensor offset drift and digital corruption during 8 kV contact ESD discharge without loading the high-impedance signal path. |
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 lower PPPM = 400 W (same rating), non-AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial only | Select when AEC-Q101 compliance is not required and cost sensitivity outweighs qualification needs |
| SMCJ12A | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, same VBR/VC specs | Requires PCB layout change; preferred where higher surge margin is mandated (e.g., industrial mains interfaces) | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits larger footprint |
Compared with SMAJ12A and SMCJ12A, the TPSMA12AHE3_A/H provides identical clamping performance in a compact SMA package with certified AEC-Q101 reliability - making it optimal for space-constrained automotive modules requiring zero qualification risk.
Availability
TPSMA12AHE3_A/H is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom line interface applications requiring stable component supply and long-term lifecycle support.
Supply support for TPSMA12AHE3_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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The TPSMA series belongs to Vishay's PAR® transient voltage suppressor family, engineered specifically for robust, high-temperature-stable clamping in harsh-environment applications including engine control, industrial automation, and telecommunications infrastructure.
FAQ
What is the breakdown voltage tolerance of the TPSMA12AHE3_A/H?
The TPSMA12AHE3_A/H has a specified breakdown voltage (VBR) range of 11.40 V (min) to 12.60 V (max) at 1.0 mA test current, yielding ±5 % tolerance around the nominal 12.0 V value. This tight distribution ensures consistent clamping behavior across production lots and supports reliable overvoltage threshold design in safety-critical circuits.
Is the TPSMA12AHE3_A/H RoHS-compliant and halogen-free?
The TPSMA12AHE3_A/H carries the HE3 suffix, indicating RoHS-compliance and AEC-Q101 qualification, but it is not halogen-free. For halogen-free compliance, the HM3-suffixed variant (e.g., TPSMA12AHM3_A/H) must be selected - both meet JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements.
What is the maximum clamping voltage of the TPSMA12AHE3_A/H under surge conditions?
The TPSMA12AHE3_A/H exhibits a maximum clamping voltage (VC) of 24.0 V when subjected to its rated 5.0 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream circuit overvoltage margin analysis.
Does the TPSMA12AHE3_A/H require heatsinking in typical applications?
No, the TPSMA12AHE3_A/H does not require external heatsinking for transient suppression duty cycles (e.g., 0.01 % duty cycle, 10/1000 µs pulses). Its 1.0 W steady-state power dissipation (PD) and thermally robust SMA package are sufficient when mounted on standard 0.2" × 0.2" copper pads - heatsinking is only needed if DC leakage or frequent surges exceed thermal limits.
How is polarity identified on the TPSMA12AHE3_A/H package?
Polarity is identified by a visible cathode band located near one end of the SMA (DO-214AC) package. The banded terminal is the cathode and must be connected toward the side of the circuit to be protected (e.g., VIN or signal line), while the unbanded end is the anode and connects to ground or reference potential.
TPSMA12AHE3_A/H 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/H FAQ
1.How can I place an order for TPSMA12AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12AHE3_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 TPSMA12AHE3_A/H reliable?
The price and inventory of TPSMA12AHE3_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 TPSMA12AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA12AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12AHE3_A/H?
TPSMA12AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12AHE3_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 TPSMA12AHE3_A/H?
For technical support, including TPSMA12AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12AHE3_A/H requirements.
6.How does Aetrix verify that TPSMA12AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA12AHE3_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 TPSMA12AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA12AHE3_A/H?
All TPSMA12AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12AHE3_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 TPSMA12AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA12AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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