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Vishay General Semiconductor - Diodes Division TPC51AHM3/87A
- Part No.:
- TPC51AHM3/87A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
TPC51AHM3/87A.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:6,725
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Product details
Overview
TPC51AHM3/87A 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 surge protection. It features a 51 V breakdown voltage (VBR), 43.6 V stand-off voltage (VWM), clamping voltage of 70.1 V at 21.4 A peak pulse current, and junction temperature rating up to +185 °C.
For engineers reviewing the TPC51AHM3/87A datasheet, TPC51AHM3/87A pinout, TPC51AHM3/87A application, or TPC51AHM3/87A equivalent, key selection criteria include its AEC-Q101 qualification, low-profile 1.1 mm height, MSL Level 1 moisture sensitivity, and unidirectional clamping behavior for DC-biased signal and power line protection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for stable breakdown characteristics under repetitive surge stress. Its 10/1000 µs waveform peak power rating of 1500 W and low incremental surge resistance enable robust clamping during inductive load switching transients.
The device operates across –65 °C to +185 °C junction temperature range and meets JESD201 Class 2 whisker resistance requirements. Its SMPC (TO-277A) package supports automated placement and provides UL 94 V-0 compliant molding compound with matte tin-plated terminals solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 48.5 / 51.0 / 53.6 V - ensures reliable conduction onset above system operating voltage while accommodating process variation |
| VWM | 43.6 V - maximum continuous reverse voltage before leakage exceeds 1 µA, suitable for 36 V automotive systems |
| VC @ IPPM | 70.1 V - clamping voltage at 21.4 A peak pulse, limiting downstream IC stress during ISO 7637-2 pulse 1/2a/5a events |
| PPPM | 1500 W - peak pulse power handling capability for 10/1000 µs transients, enabling protection of 12–48 V power rails |
| TJ max | +185 °C - extended junction temperature rating supports under-hood automotive placement without derating |
| Package | SMPC (TO-277A) - surface-mount, 3-terminal, low-profile (1.1 mm typical height) package compatible with standard SMT reflow |
Pinout & Package
TPC51AHM3/87A is housed in a 3-terminal SMPC (TO-277A) package with cathode band marking on terminal 1. The package conforms to JEDEC TO-277A outline and features matte tin-plated leads for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Anode-side reference node | Connected to protected line; forms cathode connection for unidirectional clamping path to ground |
| 2 (Cathode) | Common cathode node | Internally tied to Pin 1; dual-cathode configuration enables higher surge current handling via parallel conduction paths |
| 3 (Anode) | Ground reference | Connected to system ground or low-impedance return path; completes clamping circuit during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Junction passivation optimized design | Stable VBR drift < ±5 % after 1000 surge cycles, critical for long-life engine control and ADAS modules |
| MSL Level 1 (per J-STD-020) | No floor life limitation; can be stored indefinitely before reflow without baking preconditioning |
| Low profile (1.1 mm typical height) | Enables use in space-constrained modules such as battery management systems and radar front-ends |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation material required for automotive cabin and powertrain applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V mild-hybrid vehicle power distribution networks from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges above 43.6 V. Use Value: Withstands 1500 W pulses and operates up to +185 °C, enabling direct mounting near high-temperature power electronics. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Clamping induced ESD and inductive kickback on 24 V signal lines before reaching precision ADC inputs. Use Value: 70.1 V clamping voltage limits stress on downstream op-amps and isolators rated for ≤ 80 V absolute maximum. |
| Telecom DC Power Feeds | Consumer Power Adapter Input Stage |
Use Scenario: Surge suppression on -48 V telecom central office power feeds exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional TPC51AHM3/87A used with series fuse for fail-safe open-circuit behavior. Use Value: 21.4 A peak pulse current rating handles IEC 61000-4-5 2 Ω/12 Ω combination wave test levels. | Use Scenario: Input-stage transient protection in universal-input AC/DC adapters for smart home hubs and gateways. IC Role / Device Role / Timing Role: Mounted after bridge rectifier to suppress differential-mode surges on bulk capacitor charging path. Use Value: Low 1.1 mm profile allows placement in ultra-thin adapter PCBs without interfering with heatsink clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Lower PPPM (400 W), SMA package (higher thermal resistance), VC = 82.4 V at 4.9 A | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Choose SMAJ51A only if surge energy requirements are ≤ 400 W and automotive qualification is unnecessary. |
| TPSMD51A | Same 1500 W rating and AEC-Q101 qualification, but SMD (TO-277) package lacks HM3 halogen-free/RoHS compliance code | Legacy variant without JESD201 Class 2 whisker resistance; unsuitable for high-vibration automotive modules | Prefer TPC51AHM3/87A when whisker resistance and halogen-free compliance are mandatory per OEM specification. |
Compared with SMAJ51A and TPSMD51A, TPC51AHM3/87A uniquely combines 1500 W surge capability, +185 °C operation, AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and halogen-free construction-making it the only option meeting full Tier-1 automotive module requirements for 48 V systems.
Availability
TPC51AHM3/87A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC feeds, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for TPC51AHM3/87A 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade performance.
The TPC51AHM3/87A belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for harsh-environment transient suppression in 12 V to 48 V automotive and industrial power systems.
FAQ
What is the clamping voltage of TPC51AHM3/87A at its rated peak pulse current?
The clamping voltage (VC) of TPC51AHM3/87A is 70.1 V at its specified peak pulse current (IPPM) of 21.4 A, measured under 10/1000 µs waveform conditions. This value defines the maximum voltage seen by downstream circuitry during a surge event and is critical for ensuring compatibility with the absolute maximum ratings of protected ICs and MOSFETs in the TPC51AHM3/87A-protected system.
Is TPC51AHM3/87A qualified for automotive applications?
Yes, TPC51AHM3/87A is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood and powertrain applications. It also meets JESD201 Class 2 whisker resistance and is halogen-free and RoHS-compliant, satisfying Tier-1 automotive supplier requirements. The TPC51AHM3/87A data sheet explicitly lists automotive grade qualification in its notes section.
What does the "HM3/87A" suffix indicate in TPC51AHM3/87A?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified base part, while "87A" specifies the revision code per Vishay's internal documentation. The full ordering code TPC51AHM3/87A identifies the exact variant with confirmed electrical parameters, packaging (SMPC), and qualification status as defined in Vishay document 89056, revision 19-Apr-2022.
Can TPC51AHM3/87A be used in bidirectional configurations?
No, TPC51AHM3/87A is strictly unidirectional and must be used with correct polarity: anode (Pin 3) to ground and cathodes (Pins 1 and 2) to the protected line. For bidirectional protection, two TPC51AHM3/87A devices would need to be connected in series opposition-but this is not recommended due to mismatched VBR tolerances and reduced reliability. Use a dedicated bidirectional TVS such as SMBJ51CA instead.
What is the maximum reverse leakage current of TPC51AHM3/87A at its stand-off voltage?
At VWM = 43.6 V and TA = 25 °C, the maximum reverse leakage current (IR) of TPC51AHM3/87A is 1.0 µA. At elevated temperature (TJ = 150 °C), the leakage increases to 20 µA maximum. These values ensure minimal standby power loss in always-on automotive modules while maintaining effective high-impedance blocking below the clamping threshold.
TPC51AHM3/87A 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):
- 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)
TPC51AHM3/87A FAQ
1.How can I place an order for TPC51AHM3/87A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPC51AHM3/87A 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 TPC51AHM3/87A reliable?
The price and inventory of TPC51AHM3/87A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPC51AHM3/87A is usually 5 days.
3.What payment methods are accepted for TPC51AHM3/87A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPC51AHM3/87A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPC51AHM3/87A?
TPC51AHM3/87A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPC51AHM3/87A 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 TPC51AHM3/87A?
For technical support, including TPC51AHM3/87A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPC51AHM3/87A requirements.
6.How does Aetrix verify that TPC51AHM3/87A is sourced from the original manufacturer or authorized distributors?
All TPC51AHM3/87A 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 TPC51AHM3/87A meets industry standards.
7.What is the process for return or replacement of TPC51AHM3/87A?
All TPC51AHM3/87A units undergo pre-shipment inspection (PSI). If there is an issue with TPC51AHM3/87A, 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 TPC51AHM3/87A part is unused and in its original packaging.
Return procedure for TPC51AHM3/87A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPC51AHM3/87A Tags
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