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Vishay General Semiconductor - Diodes Division TPC18AHM3/86A
- Part No.:
- TPC18AHM3/86A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC18AHM3/86A.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:3,365
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Product details
Overview
TPC18AHM3/86A from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMPC (TO-277A) package, designed for high-reliability automotive and industrial electronics protection. It features a breakdown voltage of 17.1–18.9 V at 1.0 mA, clamping voltage of 25.2 V at 59.5 A peak pulse current, and operates up to +185 °C junction temperature.
For engineers reviewing the TPC18AHM3/86A datasheet, TPC18AHM3/86A pinout, TPC18AHM3/86A application, or TPC18AHM3/86A equivalent, key selection criteria include its AEC-Q101 qualification, low-profile 1.1 mm height, MSL Level 1 rating, and suitability for inductive load switching transients on power rails and signal lines.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and lightning-induced surges per IEC 61000-4-2/4-5. Its unidirectional architecture provides forward conduction only during overvoltage events on positive-going transients.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), with thermal design support via transient thermal impedance curves and derating above 25 °C ambient. Junction temperature range spans −65 °C to +185 °C, meeting automotive under-hood and industrial control environment requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V at 1.0 mA - defines precise clamping onset threshold for overvoltage detection |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 25.2 V at 59.5 A - peak clamped voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability for transient energy absorption |
| TJ max. | +185 °C - enables operation in high-temperature automotive engine compartments and industrial motor drives |
| Package | SMPC (TO-277A) - surface-mount, low-profile (1.1 mm height), AEC-Q101 qualified, RoHS-compliant |
Pinout & Package
SMPC (TO-277A) is a 3-terminal surface-mount package with cathode band marking. Dimensions conform to JEDEC TO-277A standard: 4.80 × 4.40 × 1.10 mm (L × W × H), with 2.13 mm nominal standoff height and recommended 6.80 × 4.72 mm PCB pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Cathode | Connected to protected line; conducts when transient exceeds VBR, shunting surge to ground |
| Terminal 2 | Cathode | Parallel cathode connection for enhanced current sharing and lower dynamic impedance |
| Terminal 3 | Anode | Common ground reference; must be low-inductance path to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Junction passivation | Reduces leakage drift and improves long-term stability under high-temperature bias conditions |
| MSL Level 1 | Unlimited floor life at ≤30 °C/85 % RH - eliminates bake requirement prior to reflow |
| Low profile (1.1 mm) | Enables use in space-constrained modules such as ADAS ECUs and battery management systems |
| Halogen-free & RoHS | Complies with environmental regulations and supports lead-free reflow profiles without tin whisker risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load-dump and jump-start transients in body control modules. IC Role / Device Role: Unidirectional TVS placed between power rail and ground to clamp surges above 15.3 V. Use Value: Limits clamped voltage to 25.2 V during 59.5 A transients, preventing damage to 3.3 V/5 V logic and analog front-ends. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules exposed to field wiring inductive kickback. IC Role / Device Role: TVS connected across differential signal pair or single-ended output to ground. Use Value: Fast response and low clamping voltage preserve signal integrity while absorbing >1500 W surge energy without degradation. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding 48 V telecom power supplies from lightning-induced surges entering via outdoor cabling. IC Role / Device Role: Primary-level TVS on input bus before DC/DC converter stage. Use Value: Withstands 200 A 8.3 ms surge and maintains stable VBR up to +185 °C ambient, ensuring uptime in outdoor cabinets. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role: TVS mounted across motor terminals or H-bridge supply rails. Use Value: Low incremental surge resistance minimizes voltage overshoot during commutation, reducing MOSFET stress and EMI emissions. |
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 PPPM (400 W), SMA package (higher thermal resistance), VC = 29.2 V @ 13.7 A | Not AEC-Q101 qualified; limited to commercial/industrial use below 150 °C | Choose for cost-sensitive non-automotive designs where surge energy is <400 W |
| TPC18AHE3/86A | Same electrical specs but HM3/HE3 suffix denotes different tape-and-reel packaging (H vs. E); identical die and SMPC footprint | No functional difference - interchangeable in circuit; differs only in reel size (1500 vs. 3000 units) and delivery mode | Select based on production volume and SMT line feeder compatibility, not performance |
Compared with SMAJ18A and TPC18AHE3/86A, the TPC18AHM3/86A delivers 3.75× higher surge power rating, automotive qualification, and lower clamping voltage - making it optimal for high-energy, high-reliability environments where thermal margin and regulatory compliance are critical.
Availability
TPC18AHM3/86A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power systems requiring stable component supply, AEC-Q101 compliance, and high-temperature operational resilience.
Supply support for TPC18AHM3/86A 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 optimization.
The TPC series belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and 1500 W surge capability are mandatory.
FAQ
What is the breakdown voltage tolerance of TPC18AHM3/86A?
The TPC18AHM3/86A has a specified breakdown voltage range of 17.1 V (min) to 18.9 V (max) at 1.0 mA test current, with 18.0 V nominal. This ±5.3 % tolerance ensures consistent clamping behavior across production lots and supports reliable overvoltage threshold setting in protected circuits.
Is TPC18AHM3/86A suitable for bidirectional transient protection?
No, TPC18AHM3/86A is unidirectional only and must be used with polarity-aware placement - anode to ground, cathodes to protected line. For bidirectional protection, Vishay offers separate part numbers like TPB18A; using TPC18AHM3/86A in reverse-biased configuration risks permanent failure due to lack of reverse breakdown specification.
Does TPC18AHM3/86A require derating at elevated ambient temperatures?
Yes, TPC18AHM3/86A must be derated above 25 °C ambient per Figure 2 in the datasheet. At 100 °C ambient, its peak pulse power drops to ~65 % of 1500 W (≈975 W), and at 150 °C, it falls to ~35 % (≈525 W). Thermal design must account for PCB copper area and airflow to maintain safe junction temperature.
What is the meaning of the 'HM3/86A' suffix in TPC18AHM3/86A?
The 'HM3' denotes halogen-free, RoHS-compliant, AEC-Q101-qualified SMPC packaging with matte tin plating and JESD201 Class 2 whisker resistance. '86A' is the revision code indicating manufacturing lot and process version - critical for traceability and compliance documentation but electrically identical to earlier revisions of TPC18A in HM3 package.
Can TPC18AHM3/86A replace SMAJ18A in existing designs without layout changes?
No - although both are unidirectional TVS diodes with similar VBR, TPC18AHM3/86A uses SMPC (TO-277A) package while SMAJ18A uses SMA (DO-214AC), differing in footprint, thermal pad layout, and solder joint geometry. Direct replacement requires PCB redesign to accommodate the 4.80 × 4.40 mm SMPC outline and dual-cathode terminal configuration of TPC18AHM3/86A.
TPC18AHM3/86A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- PAR®, eSMP®
- 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:
- TO-277A (SMPC)
TPC18AHM3/86A FAQ
1.How can I place an order for TPC18AHM3/86A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC18AHM3/86A 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 TPC18AHM3/86A reliable?
The price and inventory of TPC18AHM3/86A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPC18AHM3/86A is usually 5 days.
3.What payment methods are accepted for TPC18AHM3/86A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC18AHM3/86A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC18AHM3/86A?
TPC18AHM3/86A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC18AHM3/86A 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 TPC18AHM3/86A?
For technical support, including TPC18AHM3/86A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC18AHM3/86A requirements.
6.How does Aetrix verify that TPC18AHM3/86A is sourced from the original manufacturer or authorized distributors?
All TPC18AHM3/86A 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 TPC18AHM3/86A meets industry standards.
7.What is the process for return or replacement of TPC18AHM3/86A?
All TPC18AHM3/86A units undergo pre-shipment inspection (PSI). If there is an issue with TPC18AHM3/86A, 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 TPC18AHM3/86A part is unused and in its original packaging.
Return procedure for TPC18AHM3/86A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC18AHM3/86A Tags
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