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Vishay General Semiconductor - Diodes Division TPSMA18HE3_A/H
- Part No.:
- TPSMA18HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA18HE3_A/H.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,526
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Product details
Overview
TPSMA18HE3_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 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 25.5 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 sensor line protection.
For engineers reviewing the TPSMA18HE3_A/H datasheet, TPSMA18HE3_A/H pinout, TPSMA18HE3_A/H application, or TPSMA18HE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 rating, 1.0 W steady-state power dissipation, and compatibility with high-reliability PCB layouts requiring robust ESD and surge immunity per IEC 61000-4-2/4-5.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes and lightning-induced surges on sensitive nodes.
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a typical VBR temperature coefficient of +0.080 %/°C, enabling predictable voltage threshold behavior under thermal stress in automotive engine control units and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 V / 18.0 V / 18.9 V at 1.0 mA - defines precise overvoltage triggering threshold for reliable system-level protection |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA at 25 °C |
| VC @ IPPM | 25.5 V at 5.0 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capability under standardized surge waveform |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes polarity |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and MSL Level 1 moisture sensitivity |
Pinout & Package
SMA (DO-214AC) package with two terminals: molded plastic body, matte tin-plated leads solderable per J-STD-002, cathode indicated by color band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full 400 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line; conducts during overvoltage to shunt energy to ground |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Junction passivation | Optimized die surface treatment ensures stable VBR and low leakage over lifetime and temperature |
| MSL Level 1 | Zero floor life limitation; safe for reflow at peak 260 °C without baking or special handling |
| Low clamping ratio (VC/VBR) | 1.42 - tight ratio minimizes overvoltage margin required in protected circuit design |
| High IFSM | 40 A - withstands repeated motor commutation or relay coil de-energization events |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor interfaces (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Standby clamping element placed between signal line and chassis ground, activated only during >15.3 V transients. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs while maintaining signal integrity below VWM. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected transient absorber on field-side input traces, responding within <1 ns to suppress >1 kV spikes. Use Value: Eliminates need for external RC snubbers and extends mean time between failures in factory automation systems. |
| Consumer Power Adapter ESD Guard | Telecom Line Interface Surge Suppression |
Use Scenario: Secondary-side overvoltage protection on USB-C PD adapter outputs subject to human-body-model ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-reacting shunt device placed after DC-DC converter output filter, clamping to 25.5 V during 8 kV contact discharge. Use Value: Meets IEC 61000-4-2 Level 4 without compromising output regulation or efficiency. |
Use Scenario: Primary protection for Ethernet PHY interfaces and DSL line drivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage TVS in hybrid protection scheme, absorbing bulk energy before gas discharge tube or PTC limiter activates. Use Value: Limits let-through voltage to <30 V, preserving integrity of 3.3 V PHY transceivers per IEEE 802.3af requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same VBR (18 V) but SMB (DO-214AA) package; 600 W PPPM; higher VC = 29.2 V at 6.5 A | Requires larger PCB area; better suited for higher-energy surges where 400 W is marginal | Select when surge energy exceeds 400 W capability and board space allows SMB footprint |
| TPSMA18AHM3_A/H | Identical electrical specs; halogen-free molding compound and whisker-tested terminations per JESD 201 Class 2 | No functional difference; preferred for RoHS+halogen-free compliance programs | Choose for green manufacturing initiatives without sacrificing performance or qualification status |
Compared with SMBJ18A and TPSMA18AHM3_A/H, the TPSMA18HE3_A/H offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and verified 400 W surge handling - making it the default choice for space-constrained automotive and industrial designs requiring production traceability and MSL Level 1 process compatibility.
Availability
TPSMA18HE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, consumer power adapter ESD guard circuits, and telecom line interface surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for TPSMA18HE3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The TPSMA18HE3_A/H belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for high-temperature stability and long-term reliability in harsh environments such as engine compartments and factory floors.
FAQ
What is the breakdown voltage tolerance for TPSMA18HE3_A/H?
The TPSMA18HE3_A/H has a guaranteed breakdown voltage range of 17.1 V to 18.9 V at 1.0 mA test current, with 18.0 V as the nominal value. This ±5.3% tolerance ensures consistent clamping behavior across production lots and supports robust design margins in automotive and industrial applications where precise overvoltage thresholds are critical.
Is TPSMA18HE3_A/H suitable for bidirectional transient protection?
No, TPSMA18HE3_A/H is unidirectional only - it clamps positive transients relative to ground and blocks reverse voltage up to 15.3 V. For bidirectional protection, a separate device such as the SMBJ18CA or dual-diode configuration is required. The cathode band clearly identifies polarity, and misapplication may result in failure during negative excursions.
Does TPSMA18HE3_A/H meet AEC-Q101 requirements?
Yes, TPSMA18HE3_A/H is fully AEC-Q101 qualified, with test evidence covering HTGB, HTRB, temperature cycling, mechanical shock, and ESD per JESD22-A114. The HE3 suffix explicitly denotes this qualification, making TPSMA18HE3_A/H appropriate for automotive powertrain, body control, and ADAS subsystems requiring certified component reliability.
What is the maximum clamping voltage of TPSMA18HE3_A/H under surge conditions?
The TPSMA18HE3_A/H clamps to a maximum of 25.5 V at 5.0 A peak pulse current (10/1000 µs waveform). This value is measured per standard test conditions and represents the worst-case voltage seen by downstream circuitry during transient events - essential for verifying that protected ICs remain within absolute maximum ratings.
Can TPSMA18HE3_A/H be used in reflow soldering processes without preconditioning?
Yes, TPSMA18HE3_A/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can undergo standard lead-free reflow (peak 260 °C) without baking or dry-pack requirements. Its moisture-resistant molding compound and robust internal construction eliminate moisture-related popcorning risk during assembly.
TPSMA18HE3_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):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 15.1A
- 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)
TPSMA18HE3_A/H FAQ
1.How can I place an order for TPSMA18HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA18HE3_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 TPSMA18HE3_A/H reliable?
The price and inventory of TPSMA18HE3_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 TPSMA18HE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA18HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA18HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA18HE3_A/H?
TPSMA18HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA18HE3_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 TPSMA18HE3_A/H?
For technical support, including TPSMA18HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA18HE3_A/H requirements.
6.How does Aetrix verify that TPSMA18HE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA18HE3_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 TPSMA18HE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA18HE3_A/H?
All TPSMA18HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA18HE3_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 TPSMA18HE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA18HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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