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Vishay General Semiconductor - Diodes Division TPSMC18AHE3/9AT
- Part No.:
- TPSMC18AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
TPSMC18AHE3/9AT.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,872
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Product details
Overview
TPSMC18AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-reliability overvoltage protection of sensitive electronics. It features 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 1500 W peak pulse power (10/1000 µs), 59.5 A peak pulse current (IPPM), and clamps to 25.2 V at IPPM. It is used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supply rails.
For engineers reviewing the TPSMC18AHE3/9AT datasheet, TPSMC18AHE3/9AT pinout, TPSMC18AHE3/9AT application, or TPSMC18AHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C maximum junction temperature, unidirectional polarity, low clamping ratio (25.2 V / 18.0 V ≈ 1.40), and compatibility with high-temperature PCB assembly processes including 260 °C reflow per J-STD-020.
Technical Context
The TPSMC18AHE3/9AT operates as a silicon avalanche diode with passivated anisotropic rectifier technology, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient energy during ESD or inductive switching events. Its junction passivation enables stable performance under high-temperature stress up to TJ = 185 °C.
It is rated for non-repetitive 10/1000 µs waveform surges only, with derating above 25 °C ambient per Fig. 2. The device exhibits a positive temperature coefficient of VBR (αT = 0.080 %/°C), ensuring predictable voltage shift across operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - defines minimum voltage at which avalanche conduction begins reliably at 1 mA test current |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| IPPM | 59.5 A - peak surge current it can withstand once without failure under 10/1000 µs waveform |
| VC @ IPPM | 25.2 V - clamping voltage during full-rated surge; determines maximum stress imposed on protected downstream circuitry |
| PPPM | 1500 W - peak pulse power handling capability; defines transient energy absorption capacity per single event |
| TJ max. | 185 °C - enables operation in under-hood automotive environments and high-power industrial enclosures without thermal derating |
| Polarity | Unidirectional - protects against positive transients only; requires correct cathode orientation toward protected line |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by color band. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage event |
| Cathode | Protected line connection | Connected to line being protected (e.g., 12 V rail, sensor output); blocks normal operation but conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| 185 °C junction rating | Supports operation in high-ambient environments such as engine control units and power inverters without thermal shutdown |
| 1500 W peak pulse power | Provides robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events in industrial and automotive systems |
| Low clamping ratio (1.40) | Minimizes voltage overshoot during clamping, reducing risk of damage to downstream logic-level interfaces and analog front-ends |
| MSL Level 1, 260 °C reflow compatible | Enables standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp transients above 15.3 V. Use Value: Limits peak voltage to 25.2 V during 59.5 A surge, preventing latch-up or gate oxide rupture in MCU power domains. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS placed across sensor output and ground to absorb ESD and switching noise from nearby solenoids. Use Value: With 1 µA leakage at 15.3 V, avoids DC offset error in precision 4–20 mA loops while responding in <1 ns. |
| Consumer Power Adapter Input Stage | Telecom DC Power Distribution Board |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters after primary-side regulation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 20 V output rail to prevent damage from feedback loop faults or Zener failure. Use Value: Clamps to 25.2 V before downstream USB-PD controller ICs exceed absolute maximum ratings. | Use Scenario: Protecting -48 V telecom power distribution nodes from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48 V bus and ground to shunt positive-going transients. Use Value: 1500 W rating handles IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) without degradation. |
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 | Lower peak power (400 W), same VWM/VBR, SMA package (smaller footprint, lower thermal mass) | Not suitable for automotive load dump; limited to consumer-grade ESD and low-energy transients | Select when space-constrained and surge energy is ≤400 W; verify thermal dissipation in layout |
| TPSMC18AHM3/9AT | Identical electrical specs; halogen-free molding compound, same AEC-Q101 qualification | No functional difference; selected where halogen-free compliance is mandated by OEM or regional regulations | Drop-in replacement if halogen-free requirement applies; otherwise identical performance and fit |
Compared with SMAJ18A and TPSMC18AHM3/9AT, the TPSMC18AHE3/9AT delivers 3.75× higher surge power handling than SMAJ18A and matches TPSMC18AHM3/9AT's automotive reliability while using RoHS-compliant (non-halogen-free) packaging-making it optimal for cost-sensitive AEC-Q101 designs where halogen content is unrestricted.
Availability
TPSMC18AHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom power distribution boards requiring stable component supply and long-term lifecycle support.
Supply support for TPSMC18AHE3/9AT 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 and high-temperature performance.
The TPSMC18AHE3/9AT belongs to Vishay's PAR® series of high-power surface-mount TVS diodes, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, 185 °C operation, and robust 1500 W surge immunity.
FAQ
What is the breakdown voltage tolerance of the TPSMC18AHE3/9AT?
The TPSMC18AHE3/9AT has a specified breakdown voltage (VBR) range of 17.1 V (min) to 18.9 V (max) at 1 mA test current, with 18.0 V nominal. This ±5.6% tolerance ensures consistent clamping behavior across production lots while maintaining compatibility with 15.3 V stand-off voltage design margins. The TPSMC18AHE3/9AT achieves this via tightly controlled silicon process parameters and post-package screening.
Is the TPSMC18AHE3/9AT suitable for bidirectional transient protection?
No, the TPSMC18AHE3/9AT is unidirectional only, as confirmed in the Vishay datasheet section "FEATURES" and "PRIMARY CHARACTERISTICS". It protects against positive transients on the cathode side relative to anode (ground). For bidirectional protection, a separate device such as the SMBJ18CA or dual-diode configuration is required. The TPSMC18AHE3/9AT must be oriented with the cathode band toward the protected line.
Does the TPSMC18AHE3/9AT meet automotive qualification standards?
Yes, the TPSMC18AHE3/9AT is AEC-Q101 qualified, as explicitly stated in the "FEATURES" section and "ORDERING INFORMATION" table of the Vishay datasheet (Doc. #88407). The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress tests including HTGB, H3TRB, and temperature cycling, validating suitability for automotive powertrain and body electronics.
What is the maximum clamping voltage of the TPSMC18AHE3/9AT under full-rated surge?
The maximum clamping voltage (VC) of the TPSMC18AHE3/9AT is 25.2 V at 59.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of the Vishay datasheet and represents the worst-case voltage seen by protected circuitry during a full-rated transient event. The TPSMC18AHE3/9AT maintains this clamping performance across its full operating temperature range.
Can the TPSMC18AHE3/9AT be used in lead-free reflow processes?
Yes, the TPSMC18AHE3/9AT meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, making it fully compatible with standard lead-free soldering profiles. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102, and the HE3 suffix confirms qualification for high-temperature assembly. No pre-baking is required prior to reflow, simplifying manufacturing for the TPSMC18AHE3/9AT.
TPSMC18AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
TPSMC18AHE3/9AT FAQ
1.How can I place an order for TPSMC18AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMC18AHE3/9AT 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 TPSMC18AHE3/9AT reliable?
The price and inventory of TPSMC18AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMC18AHE3/9AT is usually 5 days.
3.What payment methods are accepted for TPSMC18AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMC18AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMC18AHE3/9AT?
TPSMC18AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMC18AHE3/9AT 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 TPSMC18AHE3/9AT?
For technical support, including TPSMC18AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMC18AHE3/9AT requirements.
6.How does Aetrix verify that TPSMC18AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All TPSMC18AHE3/9AT 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 TPSMC18AHE3/9AT meets industry standards.
7.What is the process for return or replacement of TPSMC18AHE3/9AT?
All TPSMC18AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMC18AHE3/9AT, 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 TPSMC18AHE3/9AT part is unused and in its original packaging.
Return procedure for TPSMC18AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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