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Vishay General Semiconductor - Diodes Division TPSMA12HE3/5AT
- Part No.:
- TPSMA12HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA12HE3/5AT.pdf
- Description:
- TVS DIODE 9.72VWM 17.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
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Product details
Overview
TPSMA12HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMA (DO-214AC) package, rated for 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 400 W peak pulse power (10/1000 µs), and 24.0 V clamping voltage at 5.0 A IPPM. It operates from −65 °C to +185 °C and is AEC-Q101 qualified for automotive-grade reliability.
For engineers reviewing the TPSMA12HE3/5AT datasheet, TPSMA12HE3/5AT pinout, TPSMA12HE3/5AT application, or TPSMA12HE3/5AT equivalent, key selection criteria include unidirectional polarity, 10.2 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, 185 °C junction rating, and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and fast response to transients. Its unidirectional configuration provides robust protection against positive-going surges on DC power rails and signal lines, with clamping action triggered when voltage exceeds VBR.
The device meets MSL Level 1 per J-STD-020 (peak reflow ≤ 260 °C), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and exhibits a temperature coefficient of VBR of +0.070 %/°C - enabling predictable voltage shift over temperature in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V at 1 mA - defines precise voltage threshold for avalanche conduction onset |
| VWM | 10.2 V - maximum continuous working voltage before significant leakage begins |
| VC @ IPPM | 24.0 V at 5.0 A - clamped voltage during 400 W surge, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs waveform) - peak transient energy absorption capability |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-power industrial environments |
| Polarity | Unidirectional - protects against positive transients only; cathode band denotes terminal orientation |
| IFSM | 40 A (8.3 ms half-sine) - withstands high-current inrush without bond wire failure |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded epoxy case meeting UL 94 V-0 flammability rating. Cathode indicated by color band. Terminals are matte tin-plated for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts when line voltage exceeds VBR relative to ground |
| Anode (non-banded end) | Cathode of internal PN junction | Typically tied to system ground or lowest potential reference point |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR and low leakage across 185 °C operating range |
| 400 W peak pulse power (10/1000 µs) | Protects against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in automotive ECUs |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive use including engine control, body electronics, and ADAS sensor interfaces |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (< 1 ns response time) |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VBAT and GND, absorbing energy before it reaches downstream regulators. Use Value: Clamps to 24.0 V at 5.0 A, limiting input voltage to LDOs and MCUs while surviving 185 °C under-hood temperatures. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Signal-line TVS on 0–10 V or 4–20 mA sensor outputs exposed to ESD and switching noise from solenoids. Use Value: 10.2 V VWM ensures no interference during normal operation; 1.0 µA leakage preserves measurement accuracy. |
| Consumer Power Adapter Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side surge suppression in USB-C PD adapters and AC/DC wall adapters subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on +5 V/+9 V/+15 V output rails feeding USB ports or display controllers. Use Value: 400 W PPPM handles repetitive 10/1000 µs transients; RoHS-compliant HE3 suffix supports global compliance requirements. | Use Scenario: DC power feed protection in PoE-powered base stations and remote radio units handling −48 V telecom supply. IC Role / Device Role / Timing Role: Unidirectional TVS on −48 V return path to suppress common-mode surges entering via Ethernet cabling. Use Value: 185 °C TJ rating ensures reliability in sealed outdoor enclosures; 0.070 %/°C αT allows accurate thermal derating models. |
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), higher VC (23.2 V), non-AEC-Q101 | Lacks automotive qualification; suitable for commercial/industrial only | Select if AEC-Q101 not required and cost sensitivity outweighs qualification needs |
| TPSMA12AHM3/5AT | Identical electrical specs; halogen-free molding compound and whisker-tested leads (JESD 201 Class 2) | Required for halogen-free BOMs in EU/Asia markets; same footprint and thermal performance | Choose for RoHS+halogen-free compliance without redesign or layout change |
Compared with SMAJ12A and TPSMA12AHM3/5AT, the TPSMA12HE3/5AT delivers identical clamping and surge performance with certified AEC-Q101 qualification - making it the preferred choice for automotive Tier 1 suppliers requiring traceable, high-temperature-reliable TVS components without compromising on footprint or thermal margin.
Availability
TPSMA12HE3/5AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and consumer power adapter input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for TPSMA12HE3/5AT 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, high-temperature operation, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor product line, engineered specifically for high-reliability surge protection in harsh environments including automotive under-hood, industrial motor drives, and telecom infrastructure.
FAQ
What is the clamping voltage of the TPSMA12HE3/5AT at its rated peak pulse current?
The TPSMA12HE3/5AT has a maximum clamping voltage (VC) of 24.0 V when subjected to its specified peak pulse current (IPPM) of 5.0 A under a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88405 and ensures downstream circuitry remains within safe operating limits during transient events. The TPSMA12HE3/5AT maintains this clamping performance across its full operating temperature range.
Is the TPSMA12HE3/5AT qualified for automotive applications?
Yes, the TPSMA12HE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified construction. It is rated for junction temperatures up to +185 °C and meets MSL Level 1 reflow requirements - making it suitable for engine control units, body electronics, and ADAS sensor modules. The TPSMA12HE3/5AT carries full qualification documentation per AEC-Q101 Rev H.
What does the "HE3" suffix indicate in TPSMA12HE3/5AT?
The "HE3" suffix in TPSMA12HE3/5AT identifies the part as RoHS-compliant, AEC-Q101 qualified, and built with passivated anisotropic rectifier technology. It also confirms compliance with JESD 201 Class 2 whisker testing and J-STD-002 solderability standards. The "5AT" denotes tape-and-reel packaging in 7-inch reels with 1800 units per reel - a detail verified in Vishay's ordering information table for TPSMA12AHE3_B/H.
How does the TPSMA12HE3/5AT compare to bidirectional TVS diodes in circuit design?
The TPSMA12HE3/5AT is unidirectional and must be oriented with cathode toward the protected line - unlike bidirectional types that protect both polarities. Its 10.2 V VWM allows use on positive DC rails without forward conduction, whereas a bidirectional 12 V device would have ~8.5 V VWM per polarity. The TPSMA12HE3/5AT offers tighter VBR tolerance and lower leakage than most bidirectional equivalents, making it preferable for precision DC rail protection.
What is the thermal derating behavior of the TPSMA12HE3/5AT above 25 °C ambient?
The TPSMA12HE3/5AT follows standard derating per Figure 2 in Vishay document 88405: peak pulse power decreases linearly from 400 W at 25 °C to zero at 185 °C junction temperature. At 125 °C ambient (assuming typical θJA ≈ 100 °C/W), usable PPPM drops to ~220 W. Derating is based on junction temperature, not ambient alone - so PCB copper area (e.g., 5.0 mm × 5.0 mm pads) directly impacts actual thermal margin. The TPSMA12HE3/5AT's 185 °C TJ max enables higher sustained power than standard 150 °C TVS devices.
TPSMA12HE3/5AT 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)
TPSMA12HE3/5AT FAQ
1.How can I place an order for TPSMA12HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA12HE3/5AT 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 TPSMA12HE3/5AT reliable?
The price and inventory of TPSMA12HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA12HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA12HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA12HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA12HE3/5AT?
TPSMA12HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA12HE3/5AT 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 TPSMA12HE3/5AT?
For technical support, including TPSMA12HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA12HE3/5AT requirements.
6.How does Aetrix verify that TPSMA12HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA12HE3/5AT 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 TPSMA12HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA12HE3/5AT?
All TPSMA12HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA12HE3/5AT, 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 TPSMA12HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA12HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA12HE3/5AT Tags
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