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Vishay General Semiconductor - Diodes Division TPC51AHM3_A/H
- Part No.:
- TPC51AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC51AHM3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPC51AHM3_A/H from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in TO-277A (SMPC) package, designed for high-energy surge protection of sensitive electronics. It features a standoff voltage (VWM) of 43.6 V, breakdown voltage (VBR) of 48.5–53.6 V at 1 mA, clamping voltage (VC) of 70.1 V at 21.4 A, and junction temperature rating up to +185 °C - making it suitable for automotive power line and industrial sensor interface protection.
For engineers reviewing the TPC51AHM3_A/H datasheet, TPC51AHM3_A/H pinout, TPC51AHM3_A/H application, or TPC51AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 1.1 mm profile for space-constrained PCBs, uni-directional polarity, and low incremental surge resistance for robust clamping under repetitive transients.
Technical Context
The TPC51AHM3_A/H employs passivated anisotropic rectifier technology optimized for fast response (<1 ns) and stable clamping during 10/1000 μs surge events. Its thermal design supports continuous operation up to TJ = 185 °C, enabling use in under-hood automotive environments without derating penalties above 125 °C.
It operates exclusively in unidirectional mode with a single PN junction, requiring correct anode-cathode orientation in series with the protected line. The device exhibits low forward voltage (VF = 3.5 V at 100 A) and meets JESD201 Class 2 whisker resistance, supporting automated SMT placement on high-reliability production lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum DC or continuous reverse operating voltage before leakage exceeds 1 μA; defines safe working margin below breakdown. |
| VBR min/max | 48.5 V / 53.6 V at 1 mA - verified breakdown range ensures predictable turn-on across production lots and temperature. |
| PPPM | 1500 W at 10/1000 μs - peak pulse power handling capacity determines survivability against ISO 7637-2 Pulse 5a/b surges. |
| VC @ IPPM | 70.1 V at 21.4 A - clamping voltage under max surge current; defines worst-case overvoltage seen by downstream ICs. |
| TJ max | +185 °C - enables operation in engine control units, motor drivers, and other high-ambient-temperature locations without thermal shutdown. |
| Package | TO-277A (SMPC) - surface-mount, 3-terminal, low-profile (1.1 mm height) package compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
| Polarity | Uni-directional - requires correct orientation in series with positive rail; not suitable for bidirectional AC line protection. |
Pinout & Package
TO-277A (SMPC) is a 3-terminal surface-mount package with cathode-anode-cathode configuration. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Cathode) | Cathode connection | Connected to protected line side; forms one end of the avalanche junction. |
| Terminal 2 (Anode) | Anode connection | Connected to ground or return path; defines directionality and conduction path during surge. |
| Terminal 3 (Cathode) | Cathode connection | Electrically tied to Terminal 1 internally; provides mechanical stability and current sharing in high-surge scenarios. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for powertrain and body electronics. |
| Junction temperature rating | TJ = –65 °C to +185 °C - eliminates need for external thermal derating in under-hood applications up to 150 °C ambient. |
| Low profile height | 1.1 mm typical - enables use in ultra-thin modules such as ADAS camera housings and compact ECUs. |
| MSL Level 1 | No floor life limitation - allows indefinite storage and standard reflow without baking, reducing manufacturing overhead. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes compliance with JEDEC J-STD-609A Class 1 and EU RoHS Directive 2011/65/EU - supports green manufacturing programs. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed between battery input and upstream DC/DC converter input. Use Value: Clamps transients up to 70.1 V while dissipating 1500 W, preventing damage to LDOs and microcontrollers rated for ≤45 V absolute maximum. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed in series with 4–20 mA loop or voltage output line. Use Value: Limits induced surges from nearby motor switching to <70.1 V, preserving sensor accuracy and avoiding ADC saturation. |
| Telecom Power Feeds | Consumer Power Adapter Inputs |
Use Scenario: Surge suppression on -48 V DC telecom power distribution boards exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary side of isolated DC/DC converters feeding base station radios. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W while maintaining VWM = 43.6 V - matches common -48 V nominal systems. |
Use Scenario: Input-stage protection in USB-C PD adapters and multi-port chargers subjected to ESD and hot-plug transients. IC Role / Device Role / Timing Role: Secondary-level TVS after fuse and common-mode choke, before primary-side controller. Use Value: Fast response (<1 ns) and low clamping ensure downstream MOSFETs and controllers remain within SOA during 8 kV contact ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Lower PPPM (400 W), SMA package (higher thermal resistance), VWM = 43.6 V, VC = 87.1 V at 4.6 A | Not AEC-Q101 qualified; limited to consumer/industrial use; unsuitable for automotive under-hood deployment | Select when cost sensitivity outweighs surge energy requirements and automotive qualification is unnecessary. |
| TPC51AHE3_A/H | Same electrical specs, identical TO-277A package, but HM3 vs. HE3 suffix indicates different halogen-free process and revision code | Functionally interchangeable; HE3 variant may have minor process differences affecting long-term reliability in high-humidity environments | Prefer TPC51AHM3_A/H for new designs due to documented JESD201 Class 2 whisker resistance and latest revision status. |
Compared with SMAJ51A and TPC51AHE3_A/H, the TPC51AHM3_A/H delivers higher surge robustness (1500 W vs. 400 W), automotive qualification, and lower clamping voltage - critical for protecting modern low-voltage controllers in harsh environments without increasing board area.
Availability
TPC51AHM3_A/H is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, and telecom DC feed protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPC51AHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The TPC51AHM3_A/H belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for automotive and industrial applications demanding AEC-Q101 compliance, high-temperature operation, and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of the TPC51AHM3_A/H under surge conditions?
The TPC51AHM3_A/H has a maximum clamping voltage (VC) of 70.1 V when subjected to its peak pulse current (IPPM) of 21.4 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the worst-case overvoltage imposed on protected circuitry during standardized surge events - critical for ensuring downstream components like microcontrollers or gate drivers remain within their absolute maximum ratings. The TPC51AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the TPC51AHM3_A/H suitable for automotive applications?
Yes, the TPC51AHM3_A/H is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood automotive applications including engine control units, body control modules, and ADAS power supplies. Its TO-277A package meets MSL Level 1, and its construction passes JESD201 Class 2 whisker testing - all requirements for high-reliability automotive deployment. The TPC51AHM3_A/H is explicitly listed in Vishay's automotive-grade product documentation as compliant with these standards.
What does the "HM3" suffix indicate in TPC51AHM3_A/H?
The "HM3" suffix in TPC51AHM3_A/H denotes a halogen-free, RoHS-compliant, and AEC-Q101-qualified version of the device, where "H" identifies the base package code and "M3" specifies the material revision and plating process. Per Vishay documentation, HM3 devices feature matte tin-plated terminals meeting J-STD-002 and JESD22-B102 solderability standards, plus JESD201 Class 2 whisker resistance - distinguishing them from earlier revisions like HE3. This ensures long-term interconnect reliability in high-vibration environments.
How does the TPC51AHM3_A/H compare to SMAJ51A in terms of surge handling capability?
The TPC51AHM3_A/H handles 1500 W of peak pulse power (PPPM) in a 10/1000 μs waveform, whereas the SMAJ51A is rated for only 400 W under the same conditions. This threefold increase enables the TPC51AHM3_A/H to survive severe transients like ISO 7637-2 Pulse 5a (load dump) without degradation. Additionally, the TPC51AHM3_A/H achieves lower clamping voltage (70.1 V vs. 87.1 V) at higher surge current, offering superior protection margin for modern low-voltage electronics compared to the SMAJ51A.
Can the TPC51AHM3_A/H be used in bidirectional configurations?
No, the TPC51AHM3_A/H is strictly unidirectional and must be oriented with its anode toward ground to function correctly. It contains a single PN junction optimized for forward-biased conduction during reverse-transient events - unlike bidirectional TVS devices that use back-to-back diodes. Attempting to use the TPC51AHM3_A/H in AC or floating-line applications will result in improper clamping or catastrophic failure. For bidirectional protection, discrete solutions or dedicated bidirectional TVS arrays must be selected instead of the TPC51AHM3_A/H.
TPC51AHM3_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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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)
TPC51AHM3_A/H FAQ
1.How can I place an order for TPC51AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC51AHM3_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 TPC51AHM3_A/H reliable?
The price and inventory of TPC51AHM3_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 TPC51AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TPC51AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC51AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC51AHM3_A/H?
TPC51AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC51AHM3_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 TPC51AHM3_A/H?
For technical support, including TPC51AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC51AHM3_A/H requirements.
6.How does Aetrix verify that TPC51AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPC51AHM3_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 TPC51AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TPC51AHM3_A/H?
All TPC51AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPC51AHM3_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 TPC51AHM3_A/H part is unused and in its original packaging.
Return procedure for TPC51AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC51AHM3_A/H Tags
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