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Vishay General Semiconductor - Diodes Division TPSMA18AHE3_B/H
- Part No.:
- TPSMA18AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA18AHE3_B/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,105
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Product details
Overview
TPSMA18AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients. It features a 18.0 V nominal breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 15.9 V maximum clamping voltage at 15.9 A peak pulse current, and operates up to +185 °C junction temperature - deployed in automotive sensor signal-line protection and industrial I/O interface circuits.
For engineers reviewing the TPSMA18AHE3_B/H datasheet, TPSMA18AHE3_B/H pinout, TPSMA18AHE3_B/H application, or TPSMA18AHE3_B/H equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, TJ = 185 °C capability, and 1.0 µA reverse leakage at 15.3 V stand-off voltage.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-temperature stability. Its unidirectional architecture provides low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and repetitive transients on DC power rails and signal lines.
The device is rated for 400 W peak pulse power under 10/1000 µs waveform with 0.01 % duty cycle, and derates linearly above TA = 25 °C per Fig. 2. It meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 2 whisker testing - confirming suitability for lead-free reflow assembly in automotive-grade production.
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 clamping onset threshold for overvoltage events |
| VWM | 15.3 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 25.5 V at 15.9 A - actual clamped voltage during 400 W transient, critical for downstream IC survivability |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity without failure |
| TJ max. | +185 °C - enables operation in under-hood automotive environments and high-power industrial enclosures |
| Polarity | Unidirectional - protects only against positive-going transients relative to cathode |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
TPSMA18AHE3_B/H is housed in an SMA (DO-214AC) plastic package with matte tin-plated leads. The cathode is marked by a color band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE > VBR |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control modules and ADAS sensor interfaces |
| Junction temperature rating | 185 °C maximum - supports placement near heat sources without derating loss |
| Clamping ratio (VC/VBR) | 1.42 - indicates efficient voltage limiting with minimal overshoot during fast transients |
| MSL Level 1 | Compatible with standard 260 °C peak reflow profiles without moisture sensitivity concerns |
| Low leakage at VWM | 1.0 µA at 15.3 V and 25 °C - minimizes standby power loss in battery-powered systems |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground to limit transient voltage to safe levels. Use Value: Ensures signal integrity and prevents latch-up or permanent damage to 3.3 V/5 V interface ICs during 100 V/100 ms load dump events. | Use Scenario: Shielding digital input/output channels of programmable logic controllers from inductive kickback caused by solenoid or relay switching. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC I/O lines, absorbing repetitive 400 W surges without degradation. Use Value: Extends field reliability of PLC modules in factory automation where maintenance intervals exceed 10 years. |
| Telecom Power Rail Clamping | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 12 V–48 V telecom power distribution boards against lightning-induced surges entering via external ports. IC Role / Device Role / Timing Role: Primary-level TVS on bulk supply rail upstream of DC/DC converters and PMICs. Use Value: Limits rail collapse to <25.5 V during 10/1000 µs transients, preserving brown-out immunity of downstream regulators. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines and VBUS in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on VBUS line, coordinated with ESD diodes on D+/D−. Use Value: Passes IEC 61000-4-5 Level 3 (1 kV line-earth) while maintaining USB 2.0 signal integrity up to 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Same SMA package, 400 W PPPM, but VBR = 20.0–22.2 V (higher threshold); no AEC-Q101 qualification | Not approved for automotive use; suitable for industrial/commercial designs with looser clamping tolerance | Select SMAJ18A only if AEC-Q101 compliance is not required and higher VBR aligns with system margin needs. |
| TPSMA18AHM3_B/H | Identical electrical specs and AEC-Q101 qualification; halogen-free molding compound vs. RoHS-compliant only in HE3 version | No functional difference; used where halogen-free material compliance is mandated by OEM or regional regulation | Choose TPSMA18AHM3_B/H when halogen-free certification (per IEC 61249-2-21) is contractually required. |
Compared with SMAJ18A and TPSMA18AHM3_B/H, the TPSMA18AHE3_B/H offers verified AEC-Q101 qualification and RoHS compliance in a cost-optimized manufacturing flow - making it the preferred choice for Tier-1 automotive suppliers requiring traceable, high-reliability TVS diodes without halogen-free overhead.
Availability
TPSMA18AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power rail clamping requiring stable component supply across multi-year production cycles.
Supply support for TPSMA18AHE3_B/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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature, high-surge environments in automotive and industrial control systems.
FAQ
What is the exact breakdown voltage range for TPSMA18AHE3_B/H?
The TPSMA18AHE3_B/H has a guaranteed breakdown voltage range of 17.1 V (minimum) to 18.9 V (maximum) at 1.0 mA test current, with a typical value of 18.0 V. This specification is measured per ANSI/IEEE C62.35 and confirmed in the Vishay Document Number 88405, Table on page 2. The tight 5.3 % tolerance ensures predictable clamping behavior across production lots.
Is TPSMA18AHE3_B/H qualified for automotive applications?
Yes, TPSMA18AHE3_B/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88405, page 1). The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction. It is rated for operation from –65 °C to +185 °C and passes JESD 201 Class 2 whisker testing - meeting requirements for under-hood and ADAS sensor module deployment.
What is the maximum clamping voltage of TPSMA18AHE3_B/H during a 400 W transient?
The maximum clamping voltage (VC) of TPSMA18AHE3_B/H is 25.5 V at 15.9 A peak pulse current (IPPM), corresponding to the 400 W 10/1000 µs waveform. This value is specified in the Electrical Characteristics table (page 2 of Document 88405) and represents the worst-case voltage seen by downstream circuitry during full-rated surge events.
Does TPSMA18AHE3_B/H have bidirectional polarity?
No, TPSMA18AHE3_B/H is unidirectional only, as confirmed in the Features section of the Vishay datasheet (page 1): "Available in uni-directional polarity only." It protects against positive transients on the cathode side relative to anode and must be oriented accordingly in-circuit - unlike bidirectional variants such as TPSMA18CA.
What is the thermal pad layout requirement for TPSMA18AHE3_B/H?
TPSMA18AHE3_B/H requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads attached to each terminal for rated 400 W pulse power dissipation, as specified in Note (2) under Maximum Ratings (page 1 of Document 88405). Deviation from this layout reduces peak power capability and may cause thermal runaway during repetitive surge events.
TPSMA18AHE3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 15.9A
- 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)
TPSMA18AHE3_B/H FAQ
1.How can I place an order for TPSMA18AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA18AHE3_B/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 TPSMA18AHE3_B/H reliable?
The price and inventory of TPSMA18AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA18AHE3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA18AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA18AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA18AHE3_B/H?
TPSMA18AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA18AHE3_B/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 TPSMA18AHE3_B/H?
For technical support, including TPSMA18AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA18AHE3_B/H requirements.
6.How does Aetrix verify that TPSMA18AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA18AHE3_B/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 TPSMA18AHE3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA18AHE3_B/H?
All TPSMA18AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA18AHE3_B/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 TPSMA18AHE3_B/H part is unused and in its original packaging.
Return procedure for TPSMA18AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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