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Vishay General Semiconductor - Diodes Division TPC51AHM3_A/I
- Part No.:
- TPC51AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC51AHM3_A/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:8,743
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Product details
Overview
TPC51AHM3_A/I 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 automotive-grade power and signal lines. It features a 43.6 V stand-off voltage (VWM), 48.5–53.6 V breakdown range (VBR), 70.1 V clamping voltage at 21.4 A peak pulse current, and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the TPC51AHM3_A/I datasheet, TPC51AHM3_A/I pinout, TPC51AHM3_A/I application, or TPC51AHM3_A/I equivalent, key selection criteria include its 185 °C junction rating, low-profile 1.1 mm height, MSL Level 1 moisture sensitivity, and uni-directional clamping behavior in high-reliability automotive power rail protection.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver fast response time and low incremental surge resistance. Its unidirectional architecture enables robust forward-biased surge handling on DC power rails while maintaining tight clamping performance under 10/1000 μs transients.
The device operates across -65 °C to +185 °C junction temperature range and meets JESD201 Class 2 whisker resistance. Its TO-277A (SMPC) package supports automated placement and provides UL 94 V-0 flammability compliance with matte tin-plated terminals solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VBR min/max | 48.5 V / 53.6 V at 1 mA - guaranteed breakdown onset window for reliable triggering |
| VC @ IPPM | 70.1 V at 21.4 A - clamping voltage limiting downstream circuit stress during 10/1000 μs surge |
| PPPM | 1500 W - peak pulse power handling capability per single non-repetitive 10/1000 μs waveform |
| TJ max | +185 °C - enables operation in under-hood automotive environments without thermal derating |
| Polarity | Uni-directional - protects only against positive-going transients on anode-to-cathode bias |
| Package | TO-277A (SMPC) - surface-mount, 3-terminal, low-profile (1.1 mm typical height) package |
Pinout & Package
TPC51AHM3_A/I uses the TO-277A (SMPC) package: a 3-terminal surface-mount case with cathode-anode-cathode configuration. Dimensions conform to JEDEC TO-277A standard; mounting pad layout specified for 2 oz copper PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Cathode) | Reverse-biased terminal | Connected to protected line; conducts during overvoltage to shunt energy to ground/rail |
| Terminal 2 (Anode) | Forward reference terminal | Typically tied to ground or lower-potential rail; defines conduction direction |
| Terminal 3 (Cathode) | Redundant cathode | Electrically parallel to Terminal 1; improves current sharing and thermal distribution |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Junction temperature rating | 185 °C maximum TJ enables use in engine control units and battery management systems |
| Low profile height | 1.1 mm typical - allows integration into space-constrained modules without mechanical interference |
| MSL Level 1 | No floor life limitation; compatible with standard reflow processes without baking |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental regulations and whisker resistance (JESD201 Class 2) |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator surge events. IC Role / Device Role / Timing Role: Uni-directional TVS placed between battery rail and system input to clamp positive transients. Use Value: Clamps 70.1 V at 21.4 A, limiting stress on downstream DC-DC converters rated for ≤75 V input. |
Use Scenario: Safeguarding IGBT gate drivers from switching-induced voltage spikes in variable-frequency drives. IC Role / Device Role / Timing Role: TVS connected across driver supply pins to absorb fast-rising inductive kickback. Use Value: 10/1000 μs 1500 W rating handles repetitive surges common in PWM motor control without degradation. |
| Telecom DC Power Feeds | Automotive Sensor Signal Lines |
|
Use Scenario: Securing -48 V telecom power inputs against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail to clamp negative transients relative to ground. Use Value: 1.1 mm height enables dense placement near connectors where surge entry occurs. |
Use Scenario: Shielding CAN/LIN bus transceivers from ESD and ISO 7637-2 pulse 1/2a transients. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line with cathode to signal, anode to ground. Use Value: Fast response time and 185 °C rating ensure protection remains effective in hot under-dash environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/5A (Vishay) | Same VWM/VBR range but 400 W PPPM rating; DO-214AC package; 175 °C TJ max | Limited to lower-energy surges; not AEC-Q101 qualified; unsuitable for under-hood automotive | Select when cost or board space is prioritized over automotive qualification and 1500 W surge capacity |
| TPSMD51A (Littelfuse) | 1500 W PPPM, same VWM/VBR, TO-277A package, AEC-Q101 qualified, but 175 °C TJ max | Lower thermal margin limits sustained operation above 150 °C ambient | Choose if alternate sourcing is needed but verify thermal design margins for >150 °C junction conditions |
Compared with SMAJ51A-E3/5A and TPSMD51A, TPC51AHM3_A/I delivers superior thermal resilience (185 °C TJ), tighter process control for automotive production, and identical package footprint-enabling drop-in replacement where higher junction temperature capability is required.
Availability
TPC51AHM3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial motor drive inputs, and telecom DC power feeds requiring stable component supply and long-term lifecycle support.
Supply support for TPC51AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
TPC51AHM3_A/I belongs to the PAR® series of high-power TVS diodes engineered specifically for AEC-Q101-compliant automotive and industrial surge protection where 1500 W pulse handling and 185 °C operation are critical.
FAQ
What is the clamping voltage of TPC51AHM3_A/I at its rated peak pulse current?
The TPC51AHM3_A/I has a maximum clamping voltage (VC) of 70.1 V when subjected to its rated peak pulse current (IPPM) of 21.4 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures predictable voltage limiting during surge events. The clamping performance is validated across the full operating temperature range up to 185 °C junction temperature.
Is TPC51AHM3_A/I suitable for automotive under-hood applications?
Yes, TPC51AHM3_A/I is explicitly AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood automotive applications such as engine control units, battery management systems, and ADAS power supplies. Its TO-277A package supports high-reliability solder joints, and the HM3 suffix confirms halogen-free, RoHS-compliant, and whisker-resistant construction.
What does the "HM3_A/I" suffix indicate in TPC51AHM3_A/I?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified variant with JESD201 Class 2 whisker resistance. "A" indicates revision level A; "I" specifies packaging in 13-inch tape-and-reel format with 6500 units per reel. This distinguishes it from the "H" variant (7-inch reel, 1500 units) and confirms compliance with automotive and environmental requirements.
How does the TO-277A package of TPC51AHM3_A/I differ from standard SMA or SMB packages?
The TO-277A (SMPC) package used by TPC51AHM3_A/I features three terminals (cathode-anode-cathode), lower profile (1.1 mm height), and higher thermal mass than two-terminal SMA/SMB packages. Its symmetrical dual-cathode layout improves current sharing and reduces thermal resistance, enabling 1500 W pulse handling-more than triple the capability of typical SMA-packaged TVS devices.
Can TPC51AHM3_A/I be used for bidirectional transient suppression?
No, TPC51AHM3_A/I is strictly unidirectional and must be installed with correct polarity-cathode toward the protected line, anode toward ground or lower potential. It does not suppress negative-going transients on the protected line. For bidirectional protection, a separate device or a dedicated bi-directional TVS (e.g., TPC51CA variant) is required; the TPC51AHM3_A/I datasheet explicitly states "Uni-direction only" as a core feature.
TPC51AHM3_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):
- 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/I FAQ
1.How can I place an order for TPC51AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC51AHM3_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 TPC51AHM3_A/I reliable?
The price and inventory of TPC51AHM3_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 TPC51AHM3_A/I is usually 5 days.
3.What payment methods are accepted for TPC51AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC51AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC51AHM3_A/I?
TPC51AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC51AHM3_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 TPC51AHM3_A/I?
For technical support, including TPC51AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC51AHM3_A/I requirements.
6.How does Aetrix verify that TPC51AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All TPC51AHM3_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 TPC51AHM3_A/I meets industry standards.
7.What is the process for return or replacement of TPC51AHM3_A/I?
All TPC51AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPC51AHM3_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 TPC51AHM3_A/I part is unused and in its original packaging.
Return procedure for TPC51AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC51AHM3_A/I Tags
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