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Vishay General Semiconductor - Diodes Division TPC18AHM3_A/H
- Part No.:
- TPC18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
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Product details
Overview
TPC18AHM3_A/H from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in TO-277A (SMPC) package, designed for robust overvoltage protection of sensitive electronics. It features a breakdown voltage of 17.1–18.9 V at 1.0 mA test current, clamps to ≤25.2 V at 59.5 A peak pulse current, and operates across –65 °C to +185 °C junction temperature range. It is used to protect MOSFETs, ICs, and sensor signal lines in automotive powertrain control modules.
For engineers reviewing the TPC18AHM3_A/H datasheet, TPC18AHM3_A/H pinout, TPC18AHM3_A/H application, or TPC18AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C maximum junction temperature, low-profile 1.1 mm height, uni-directional polarity, and 1500 W peak pulse power rating per 10/1000 μs waveform.
Technical Context
The TPC18AHM3_A/H employs passivated anisotropic rectifier technology optimized for high-reliability transient suppression. Its unidirectional architecture provides forward conduction during overvoltage events while maintaining low leakage (<1.0 μA at 15.3 V) and fast response time under standardized 10/1000 μs surge conditions.
Rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), it delivers 3.5 V maximum forward voltage at 100 A and meets JESD201 Class 2 whisker resistance. The device is qualified to AEC-Q101 and rated MSL Level 1 per J-STD-020, supporting automated SMT placement on automotive-grade PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or inductive switching events |
| Breakdown Voltage VBR | 17.1–18.9 V at 1.0 mA - defines precise turn-on threshold for clamping before downstream circuit damage |
| Clamping Voltage VC | ≤25.2 V at 59.5 A - limits protected node voltage to safe levels during worst-case surge |
| Stand-off Voltage VWM | 15.3 V - maximum continuous reverse operating voltage without significant leakage |
| Junction Temperature Range | –65 °C to +185 °C - enables deployment in under-hood automotive environments and industrial motor drives |
| Package | TO-277A (SMPC) - surface-mount, low-profile (1.1 mm typical height), AEC-Q101 qualified, halogen-free |
| Surge Current IPPM | 59.5 A - peak current handling capability under standardized 10/1000 μs waveform |
Pinout & Package
TO-277A (SMPC) package with three terminals: Anode (Pin 1), Cathode 1 (Pin 2), Cathode 2 (Pin A). Matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards; HM3 suffix indicates JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connects to protected line's positive side; conducts during overvoltage clamp event |
| Cathode 1 (Pin 2) | Common cathode connection | Internally tied to Cathode 2; forms single low-inductance cathode node for bidirectional layout symmetry |
| Cathode 2 (Pin A) | Common cathode connection | Electrically identical to Pin 2; enables dual-pad mounting for thermal and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| 185 °C maximum junction temperature | Supports operation in high-ambient under-hood locations without derating in most duty cycles |
| Very low profile (1.1 mm typical height) | Enables use in space-constrained modules such as battery management systems and ADAS ECUs |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking, simplifying manufacturing logistics |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting gate drivers and microcontroller I/O pins from inductive kickback during solenoid and relay switching in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed at power input and signal interface points to clamp transients before they reach sensitive logic. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V MCU peripherals by limiting voltage to ≤25.2 V during 59.5 A surges. |
Use Scenario: Safeguarding encoder feedback lines and PWM gate drive signals in variable-frequency drives exposed to motor cable reflections. IC Role / Device Role / Timing Role: Transient suppressor installed at board-level interfaces between motor controller and external sensors or actuators. Use Value: Maintains signal integrity under repetitive 1500 W surges while operating continuously up to 185 °C ambient. |
| Automotive Body Electronics | Telecom Power Supply Input |
Use Scenario: Shielding LIN bus transceivers and LED driver ICs from load dump and jump-start transients in door module and lighting control units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail and data lines, positioned upstream of LDO regulators. Use Value: Enables compliance with ISO 7637-2 Pulse 5a (load dump) due to 1500 W rating and fast response time. |
Use Scenario: Protecting AC/DC front-end rectifiers and PFC controllers in telecom base station power supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary surge protection stage after MOVs, providing precise clamping and low capacitance on DC bus lines. Use Value: Delivers stable 15.3 V stand-off with <1.0 μA leakage at 125 °C, minimizing standby power loss. |
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-E3/5A (Vishay) | Lower 400 W peak power; SMA package; 18 V nominal VBR; 28.2 V clamping at 14.3 A | Targeted at lower-energy consumer and industrial applications; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and surge energy requirements |
| TPC18AHM3_A/I (Vishay) | Identical electrical specs; same TO-277A package; differs only in packaging format (13" reel, 6500 pcs) | No functional difference; used for high-volume production with extended reel length | Choose for large-batch SMT assembly where tape-and-reel logistics favor 13" reels |
Compared with SMAJ18A-E3/5A and TPC18AHM3_A/I, the TPC18AHM3_A/H offers the highest surge robustness (1500 W vs. 400 W) and automotive qualification, while sharing identical electrical performance with TPC18AHM3_A/I-making it optimal for AEC-Q101–mandated designs requiring 7" tape-and-reel delivery.
Availability
TPC18AHM3_A/H is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power supply input applications requiring stable component supply, long-term lifecycle support, and AEC-Q101–compliant sourcing.
Supply support for TPC18AHM3_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 diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The TPC series belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for harsh-environment transient suppression in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of the TPC18AHM3_A/H under standard surge conditions?
The TPC18AHM3_A/H has a maximum clamping voltage (VC) of 25.2 V when subjected to its rated peak pulse current of 59.5 A under the 10/1000 μs waveform defined in IEC 61000-4-5. This value is measured at room temperature and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. The TPC18AHM3_A/H maintains this clamping performance across its full operating temperature range, making it suitable for demanding automotive applications where voltage margin is critical.
Is the TPC18AHM3_A/H qualified for automotive use?
Yes, the TPC18AHM3_A/H is AEC-Q101 qualified and explicitly rated for automotive applications. Its qualification includes stress testing for temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge per JESD22-A114. The device also supports junction temperatures up to +185 °C and meets MSL Level 1 per J-STD-020-key requirements for under-hood and powertrain control modules. The TPC18AHM3_A/H is listed in Vishay's official AEC-Q101 qualified product catalog.
What does the "HM3_A/H" suffix indicate in TPC18AHM3_A/H?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101–qualified TO-277A package with matte tin plating and JESD201 Class 2 whisker resistance. The "A" indicates revision level, and "H" specifies the packaging format: 7-inch diameter plastic tape-and-reel with 1500 units per reel. This distinguishes it from TPC18AHM3_A/I, which uses a 13-inch reel with 6500 units. The TPC18AHM3_A/H is fully compatible with standard SMT pick-and-place equipment.
How does the TPC18AHM3_A/H compare to bidirectional TVS diodes in terms of application scope?
The TPC18AHM3_A/H is unidirectional and intended for DC circuits where polarity is fixed-such as 12 V automotive rails or regulated DC power inputs. Unlike bidirectional TVS diodes, it does not conduct in reverse bias beyond its stand-off voltage (15.3 V), eliminating leakage concerns in polarized systems. Its design avoids the higher capacitance and reduced surge margin typical of bidirectional variants. For AC or floating-signal applications, a different device type would be required; the TPC18AHM3_A/H is optimized exclusively for unidirectional protection.
What is the thermal resistance characteristic of the TPC18AHM3_A/H in typical PCB layouts?
The TPC18AHM3_A/H exhibits transient thermal impedance of approximately 1.2 °C/W at 1 ms pulse duration when mounted on a recommended 2 oz. copper PCB pad layout per Vishay's datasheet Figure 5. Its low-profile TO-277A package enables efficient heat spreading across dual cathode pads. Steady-state thermal resistance (RθJA) depends on board layout but typically falls between 45–60 °C/W with 1 in² of 2 oz. copper. This allows the TPC18AHM3_A/H to sustain repeated 1500 W pulses without exceeding its 185 °C junction limit under controlled duty cycles.
TPC18AHM3_A/H 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:
- Active
- 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_A/H FAQ
1.How can I place an order for TPC18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC18AHM3_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 TPC18AHM3_A/H reliable?
The price and inventory of TPC18AHM3_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 TPC18AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TPC18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC18AHM3_A/H?
TPC18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC18AHM3_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 TPC18AHM3_A/H?
For technical support, including TPC18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC18AHM3_A/H requirements.
6.How does Aetrix verify that TPC18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPC18AHM3_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 TPC18AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TPC18AHM3_A/H?
All TPC18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPC18AHM3_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 TPC18AHM3_A/H part is unused and in its original packaging.
Return procedure for TPC18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC18AHM3_A/H Tags
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