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Vishay General Semiconductor - Diodes Division TPSMA12HE3_A/H
- Part No.:
- TPSMA12HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12HE3_A/H.pdf
- Description:
- TVS DIODE 9.72VWM 17.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMA12HE3_A/H 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 12.0 V nominal breakdown voltage (VBR), 10.2 V stand-off voltage (VWM), 24.0 V maximum clamping voltage (VC) at 5.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive power rail protection.
For engineers reviewing the TPSMA12HE3_A/H datasheet, TPSMA12HE3_A/H pinout, TPSMA12HE3_A/H application, or TPSMA12HE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with high-reliability PCB layouts requiring robust ESD/surge immunity in engine control units and ADAS sensor interfaces.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping performance under repetitive surge stress. Its 10/1000 µs waveform response supports 400 W peak pulse power with low incremental surge resistance and fast response time - critical for protecting MOSFETs and ICs against inductive switching spikes and lightning-induced surges.
The device is rated for TJ = –65 °C to +185 °C, meets JESD201 Class 2 whisker resistance, and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002. The HE3 suffix confirms AEC-Q101 qualification and compliance with automotive reliability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 V / 12.0 V / 12.6 V - ensures reliable triggering above system operating voltage while avoiding false clamping during normal operation |
| VWM | 10.2 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA, matching 12 V automotive supply rails |
| VC @ IPPM | 24.0 V at 5.0 A - limits transient voltage across protected circuitry to safe levels during 400 W surge events |
| PPPM | 400 W (10/1000 µs) - sustains high-energy transients without failure, suitable for ISO 7637-2 Pulse 1/2a/5a compliance testing |
| TJ max. | +185 °C - enables placement near heat-generating components in under-hood automotive modules |
| Polarity | Unidirectional - provides reverse-biased clamping only, optimized for DC power line protection with cathode-to-rail configuration |
| MSL Level | Level 1 (J-STD-020) - allows standard reflow without baking, reducing manufacturing complexity |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode indicated by color band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), with 5.0 mm × 5.0 mm copper pad layout recommended for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to system ground or low-side reference | Enables clamping when transient exceeds VBR; must be routed with low-inductance path to minimize overshoot |
| Cathode | Current exit point during reverse-biased clamping; connected to protected line (e.g., 12 V rail) | Defines clamping polarity; color band identifies this terminal for correct PCB orientation and functional safety alignment |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for ECUs and body control modules |
| Junction temperature capability | Rated to +185 °C - supports operation in high-ambient environments such as engine compartments and power inverters |
| Low clamping voltage | VC = 24.0 V at 5.0 A - minimizes stress on downstream 24 V tolerant components like CAN transceivers and microcontrollers |
| Fast response time | Sub-nanosecond turn-on - arrests transients before sensitive logic or analog circuits experience overvoltage damage |
| MSL Level 1 | No floor life limitation - eliminates pre-bake requirements and streamlines SMT assembly for high-volume automotive production |
Applications
| Engine Control Unit (ECU) Power Protection | Automotive Camera Module Signal Lines |
|---|---|
Use Scenario: Protects 12 V supply input of engine control units against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input to clamp surges before regulation stage. Use Value: Withstands 400 W pulses and operates up to +185 °C, ensuring uninterrupted function during extended high-temperature engine operation. | Use Scenario: Shields LVDS or FPD-Link III video signal lines in rear-view or surround-view cameras from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with differential pairs to suppress transients without distorting high-speed video signals. Use Value: Clamps to 24.0 V while maintaining signal integrity - verified via 1.0 MHz junction capacitance data and fast response for <100 ps ESD pulses. |
| Body Control Module (BCM) Input Protection | ADAS Radar Power Supply Filtering |
Use Scenario: Guards wake-up inputs and LIN bus lines in BCMs against electrostatic discharge and inductive kickback from relay coils. IC Role / Device Role / Timing Role: Standoff voltage of 10.2 V ensures no conduction during normal 12 V operation; triggers only during >11.4 V transients. Use Value: AEC-Q101 qualification and JESD201 Class 2 whisker resistance guarantee long-term reliability in vibration-prone vehicle door modules. | Use Scenario: Safeguards 5 V or 12 V radar module power inputs against coupled transients from adjacent high-power RF sections or switching regulators. IC Role / Device Role / Timing Role: Mounted directly at power entry point to absorb energy before reaching GaN FETs and MMICs. Use Value: 400 W peak pulse rating and 24.0 V clamping enable compliance with ISO 11452-4 bulk current injection test levels without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12AHE3_A/H | Same SMA package, identical VBR (11.4–12.6 V), but lower PPPM = 400 W (same rating), higher VC = 19.9 V at 20.1 A - different test current basis | Designed for higher IPPM applications; less optimal for low-current precision clamping where 5.0 A VC matters | Select TPSMA12HE3_A/H when clamping voltage at lower surge currents (≤5 A) is critical for downstream component margin |
| 1.5SMC12AH | Same VBR range, but SMC (DO-214AB) package - larger footprint (7.11 mm × 6.22 mm), higher thermal mass, PPPM = 1500 W | Used where board space permits and higher surge energy handling is needed; not drop-in compatible due to different pad layout | Choose TPSMA12HE3_A/H for space-constrained automotive modules requiring AEC-Q101 and MSL Level 1 in compact SMA form factor |
Compared with SMAJ12AHE3_A/H and 1.5SMC12AH, the TPSMA12HE3_A/H offers tighter VC specification at low IPPM (24.0 V @ 5.0 A), smaller SMA footprint for dense PCB layouts, and guaranteed AEC-Q101 qualification - making it preferred for modern ADAS and powertrain control units where size, thermal resilience, and automotive certification are jointly critical.
Availability
TPSMA12HE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, sensor interface surge suppression, and industrial control system transient immunity requiring stable component supply across multi-year production cycles.
Supply support for TPSMA12HE3_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 reliability, efficiency, and application-specific performance.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature, high-reliability automotive and industrial environments demanding AEC-Q101 compliance and sustained operation beyond 150 °C.
FAQ
What is the breakdown voltage tolerance for TPSMA12HE3_A/H?
The TPSMA12HE3_A/H has a specified breakdown voltage (VBR) range of 11.4 V (minimum) to 12.6 V (maximum) at 1.0 mA test current, with 12.0 V nominal. This ±5% tolerance ensures consistent clamping behavior across production lots while accommodating thermal drift via its 0.070 %/°C temperature coefficient - critical for stable protection in varying ambient conditions.
Is TPSMA12HE3_A/H qualified for automotive use?
Yes, TPSMA12HE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant, AEC-Q101 qualified, and JESD201 Class 2 whisker-tested construction. It is explicitly intended for automotive applications including engine control, body electronics, and ADAS subsystems where reliability under thermal and mechanical stress is mandatory.
What is the maximum clamping voltage of TPSMA12HE3_A/H and at what current is it measured?
The maximum clamping voltage (VC) of TPSMA12HE3_A/H is 24.0 V, measured at a peak pulse current (IPPM) of 5.0 A using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is validated per ANSI/IEEE C62.35 standards - essential for ensuring downstream ICs remain within absolute maximum ratings.
Does TPSMA12HE3_A/H have a bidirectional configuration option?
No, TPSMA12HE3_A/H is unidirectional only, as stated in the Vishay datasheet. It provides reverse-biased clamping for DC power lines and is not suitable for AC or bipolar signal protection. For bidirectional applications, engineers must select alternate part numbers such as TPSMA12CAHE3_A/H - which is a separate device with distinct marking, packaging, and electrical characteristics.
What is the moisture sensitivity level (MSL) rating for TPSMA12HE3_A/H?
TPSMA12HE3_A/H meets MSL Level 1 per J-STD-020, with a maximum lead-free reflow peak temperature of 260 °C. This means the device has unlimited floor life and can be mounted using standard SMT reflow processes without baking or special handling - simplifying manufacturing for high-volume automotive electronics production.
TPSMA12HE3_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):
- 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/H FAQ
1.How can I place an order for TPSMA12HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12HE3_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 TPSMA12HE3_A/H reliable?
The price and inventory of TPSMA12HE3_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 TPSMA12HE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA12HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12HE3_A/H?
TPSMA12HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12HE3_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 TPSMA12HE3_A/H?
For technical support, including TPSMA12HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12HE3_A/H requirements.
6.How does Aetrix verify that TPSMA12HE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA12HE3_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 TPSMA12HE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA12HE3_A/H?
All TPSMA12HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12HE3_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 TPSMA12HE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA12HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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