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Vishay General Semiconductor - Diodes Division TPC24AHM3_A/I
- Part No.:
- TPC24AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC24AHM3_A/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:6,805
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Product details
Overview
TPC24AHM3_A/I from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in TO-277A (SMPC) package, designed for high-reliability protection of MOSFETs and ICs against inductive switching transients and lightning surges. It features a breakdown voltage of 22.8–25.2 V, clamping voltage of 33.2 V at 45.2 A, and operates up to 185 °C junction temperature.
For engineers reviewing the TPC24AHM3_A/I datasheet, TPC24AHM3_A/I pinout, TPC24AHM3_A/I application, or TPC24AHM3_A/I equivalent, this device serves as an AEC-Q101 qualified, halogen-free, RoHS-compliant TVS optimized for automotive powertrain and industrial motor control circuits where low-profile surface-mount surge protection with fast response (<1 ns) and MSL Level 1 handling is required.
Technical Context
The TPC24AHM3_A/I implements passivated anisotropic rectifier technology to achieve stable breakdown behavior and low incremental surge resistance. Its unidirectional architecture enables integration into DC power rails and signal lines where reverse conduction must be blocked during normal operation.
Rated for 1500 W peak pulse power (10/1000 μs waveform), it delivers 45.2 A peak pulse current with 33.2 V clamping voltage and maintains <1.0 μA leakage at 20.5 V standoff voltage (VWM). The device meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 22.8 V / 25.2 V - ensures reliable triggering above system operating voltage while avoiding false clamping during transients |
| VWM | 20.5 V - maximum continuous reverse working voltage compatible with 24 V nominal automotive and industrial DC systems |
| VC @ IPPM | 33.2 V - clamping voltage limits downstream component stress during 45.2 A surge events |
| PPPM | 1500 W - peak pulse power rating supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| TJ max | +185 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures without derating |
| Package | TO-277A (SMPC) - ultra-low profile (1.1 mm height), compatible with automated SMT placement and high-density PCB layouts |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and temperature cycling |
Pinout & Package
TO-277A (SMPC) is a 3-terminal surface-mount package with cathode-anode-cathode configuration. The package measures 4.80 × 3.70 × 1.10 mm and features matte tin-plated leads compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Cathode) | Reverse-biased terminal connected to protected line | Provides primary surge path to ground when voltage exceeds VBR; paired with Terminal 2 for symmetrical layout |
| Terminal 2 (Anode) | Reference/ground connection point | Serves as common return node; must be routed to low-impedance ground plane to minimize clamping overshoot |
| Terminal 3 (Cathode) | Reverse-biased terminal connected to protected line | Duplicates Terminal 1 functionality to support dual-cathode layout for improved current sharing and thermal distribution |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR over lifetime and temperature, critical for long-term automotive deployments |
| Low profile (1.1 mm height) | Enables placement beneath connectors or in constrained spaces such as ECU modules and battery management systems |
| MSL Level 1 rating | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and cycle time for high-volume production |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates including EU RoHS Directive 2011/65/EU and JEDEC JS709E |
| 185 °C junction capability | Supports operation in engine bay, power inverter, and industrial drive applications without thermal derating penalties |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and high-side switches in 12 V/24 V engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed across MOSFET drain-source or gate-source to clamp induced transients before they exceed absolute maximum ratings. Use Value: Limits clamping voltage to 33.2 V at 45.2 A, preventing gate oxide rupture and ensuring >100,000-cycle reliability under ISO 16750-2 load dump conditions. |
Use Scenario: Safeguarding IGBT gate drivers and feedback sensors in variable-frequency drives subjected to inductive kickback from 3-phase motors. IC Role / Device Role / Timing Role: Mounted directly at motor controller PCB input terminals to absorb 1500 W surge energy within nanoseconds. Use Value: Achieves sub-1 ns response time and 33.2 V clamping, reducing risk of false triggering and enabling tighter voltage margin design for 24 V auxiliary supplies. |
| Telecom Power Supply Input | Consumer Appliance Main Board |
|
Use Scenario: Front-end protection of AC/DC adapters and PoE injectors against lightning-induced surges on 24–48 V DC inputs. IC Role / Device Role / Timing Role: Primary surge suppression element placed upstream of DC-DC converters and PMICs. Use Value: Withstands 45.2 A peak pulse current and maintains <1.0 μA leakage at 20.5 V, preserving standby efficiency while meeting IEC 61000-4-5 Level 4 immunity. |
Use Scenario: Overvoltage protection for microcontroller I/O and display backlight drivers in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Localized TVS on 24 V power rail feeding motor driver ICs and Hall-effect sensors. Use Value: TO-277A's 1.1 mm height allows co-location with sensitive components, minimizing trace inductance and improving clamping effectiveness by >30 % vs. larger packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), higher VC (38.9 V), SMA package (higher profile, 2.3 mm) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 2 kV tests | Select when cost sensitivity outweighs surge energy requirements and board space permits taller profile |
| TPC24AHM3_A/H | Identical electrical specs; differs only in tape-and-reel packaging (7" vs. 13" reel, 1500 vs. 6500 units) | No functional difference; same thermal, electrical, and mechanical performance | Choose based on production volume and SMT line feeder compatibility rather than circuit design |
Compared with SMAJ24A and TPC24AHM3_A/H, the TPC24AHM3_A/I offers superior surge handling (1500 W vs. 400 W), lower clamping voltage (33.2 V vs. 38.9 V), and smaller footprint-making it optimal for space-constrained, high-reliability automotive and industrial designs requiring AEC-Q101 qualification and MSL Level 1 processing.
Availability
TPC24AHM3_A/I 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, full traceability, and long-term lifecycle support.
Supply support for TPC24AHM3_A/I 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 application-specific optimization.
The TPC series was developed specifically for high-energy transient suppression in automotive and industrial environments, targeting AEC-Q101 compliance, extended temperature operation, and low-profile SMT integration.
FAQ
What is the maximum clamping voltage of the TPC24AHM3_A/I under surge conditions?
The TPC24AHM3_A/I has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 45.2 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream 24 V-rated components. The TPC24AHM3_A/I achieves this clamping performance while maintaining low incremental surge resistance, ensuring minimal voltage overshoot during fast-rising transients.
Is the TPC24AHM3_A/I suitable for automotive under-hood applications?
Yes, the TPC24AHM3_A/I is AEC-Q101 qualified and rated for a maximum junction temperature of +185 °C, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and battery disconnect units. Its TO-277A package provides mechanical robustness and thermal performance needed in high-vibration, high-temperature environments. The TPC24AHM3_A/I also meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 requirements for automotive manufacturing.
How does the dual-cathode configuration of the TPC24AHM3_A/I improve surge handling?
The TPC24AHM3_A/I uses a three-terminal TO-277A package with two cathodes (Terminals 1 and 3) and one anode (Terminal 2), enabling symmetrical current splitting during high-current transients. This configuration reduces effective surge resistance and improves thermal distribution across the die, supporting the full 1500 W peak pulse power rating. The dual-cathode layout also minimizes parasitic inductance in PCB routing, enhancing clamping speed and consistency compared to standard two-terminal TVS diodes like the TPC24AHM3_A/I's single-anode alternatives.
What is the standoff voltage (VWM) of the TPC24AHM3_A/I, and why is it important?
The TPC24AHM3_A/I has a maximum working standoff voltage (VWM) of 20.5 V, meaning it remains non-conductive under normal 24 V system operation with margin for ripple and tolerance. This parameter ensures no leakage-induced power loss or false triggering during steady-state conditions. Maintaining VWM below typical 24 V rail peaks (e.g., 28.5 V load dump) while keeping VBR sufficiently above prevents nuisance conduction-critical for reliability in always-on automotive modules. The TPC24AHM3_A/I's 20.5 V VWM balances safety margin and clamping responsiveness.
Does the TPC24AHM3_A/I require special PCB layout considerations?
Yes-the TPC24AHM3_A/I benefits from short, wide traces between its terminals and the protected node, especially between Terminal 2 (anode) and ground, to minimize inductance that could degrade clamping performance. Vishay recommends using the provided mounting pad layout (0.268" × 0.186") with 2 oz. copper and thermal vias under the anode pad. Because the TPC24AHM3_A/I handles 45.2 A peak current, inadequate copper area or via count may cause localized heating and reduced surge endurance. Proper layout ensures the TPC24AHM3_A/I delivers its full 1500 W rating without thermal derating.
TPC24AHM3_A/I 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- 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)
TPC24AHM3_A/I FAQ
1.How can I place an order for TPC24AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC24AHM3_A/I 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 TPC24AHM3_A/I reliable?
The price and inventory of TPC24AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPC24AHM3_A/I is usually 5 days.
3.What payment methods are accepted for TPC24AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC24AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC24AHM3_A/I?
TPC24AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC24AHM3_A/I 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 TPC24AHM3_A/I?
For technical support, including TPC24AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC24AHM3_A/I requirements.
6.How does Aetrix verify that TPC24AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All TPC24AHM3_A/I 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 TPC24AHM3_A/I meets industry standards.
7.What is the process for return or replacement of TPC24AHM3_A/I?
All TPC24AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPC24AHM3_A/I, 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 TPC24AHM3_A/I part is unused and in its original packaging.
Return procedure for TPC24AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC24AHM3_A/I Tags
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Diodes Incorporated
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Diodes Incorporated
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