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Vishay General Semiconductor - Diodes Division SMPC51AN-M3/H
- Part No.:
- SMPC51AN-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC51AN-M3/H.pdf
- Description:
- TVS DIODE 51VWM 82.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:4,476
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Product details
Overview
SMPC51AN-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMPC (TO-277A) package, designed for high-energy surge protection with 51 V stand-off voltage (VWM), 56.7–62.7 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 μs. It delivers 18.2 A peak pulse current (IPPM) and clamps transients to ≤82.4 V, targeting automotive sensor lines and industrial control inputs.
For engineers reviewing the SMPC51AN-M3/H datasheet, SMPC51AN-M3/H pinout, SMPC51AN-M3/H application, or SMPC51AN-M3/H equivalent, this device is selected for robust ESD/surge immunity in AEC-Q101-compliant systems where low-profile mounting (<1.1 mm height), halogen-free RoHS compliance, and MSL Level 1 reflow capability are mandatory.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging avalanche breakdown to limit transient overvoltages before they damage downstream ICs or MOSFETs. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes and lightning-induced surges.
The SMPC51AN-M3/H is thermally optimized for FR4 PCBs with 2 oz copper, exhibiting RθJA ≤ 100 °C/W and RθJM ≤ 3 °C/W. Its junction temperature range spans −55 °C to +150 °C, supporting operation in under-hood automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 56.7 V / 62.7 V at 1 mA - guaranteed avalanche onset window for predictable turn-on |
| VC @ IPPM | ≤82.4 V at 18.2 A - clamping voltage under full 1500 W surge, limiting stress on protected circuitry |
| PPPM | 1500 W (10/1000 μs) - peak transient energy absorption capacity per IEC 61000-4-5 |
| IR @ VWM | ≤1.0 μA - negligible leakage at rated stand-off, preserving signal integrity and power efficiency |
| TJ max | +150 °C - enables deployment in high-temperature automotive and industrial enclosures |
| Package | SMPC (TO-277A) - 3-terminal SMD outline with cathode band marking and 1.1 mm profile for automated placement |
Pinout & Package
SMPC51AN-M3/H uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with anode-anode-cathode configuration. The cathode is marked by a band on the top surface. Mounting pad layout follows JEDEC TO-277A standard dimensions (0.189" × 0.173" body, 0.268" × 0.186" pad footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | One of two parallel anode terminals; connects to ground or common reference plane in unidirectional clamp topology |
| Anode 2 | Secondary anode connection | Electrically tied to Anode 1 internally; provides redundant solder joint and lower thermal resistance path to PCB ground plane |
| Cathode | Transient voltage input terminal | Connected to protected line (e.g., sensor supply or signal); conducts avalanche current to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection of DC-biased lines without forward conduction during normal operation |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure |
| Halogen-free & RoHS | Complies with environmental regulations and eliminates corrosive halogen emissions during thermal stress |
| Low profile (1.1 mm) | Minimizes board space and enables use in ultra-thin modules such as automotive camera housings |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output line and ground, activated only during positive transients. Use Value: Limits transient voltage to ≤82.4 V while sustaining 18.2 A surge, preventing latch-up or gate oxide damage in connected microcontrollers and ADCs. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-mode protector on 24 V DC input lines, absorbing repetitive 1500 W surges without degradation. Use Value: Maintains ≤1.0 μA leakage at 51 V, ensuring stable logic thresholds and eliminating false triggering in high-noise factory environments. |
| Telecom Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Securing 48 V PoE-powered Ethernet switch ports against lightning-induced surges on data and power lines. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail, coordinated with upstream fuses and secondary filtering. Use Value: Delivers 1500 W peak power handling with ≤82.4 V clamping, meeting IEC 61000-4-5 Level 4 requirements for outdoor telecom equipment. |
Use Scenario: Adding surge immunity to USB Type-C power delivery circuits in portable monitors and docking stations. IC Role / Device Role / Timing Role: Unidirectional suppressor on VBUS line, placed adjacent to connector to intercept external transients before reaching PD controller. Use Value: 1.1 mm height allows integration into tight USB port layouts; halogen-free construction meets consumer safety standards for enclosed devices. |
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-E3/5A (Vishay) | DO-214AC package; same VWM/VBR/PPPM specs but higher RθJA (150 °C/W) and 2.2 mm height | Lacks AEC-Q101 qualification; not rated for automotive under-hood use | Select when cost or legacy footprint compatibility outweighs height and automotive qualification needs |
| 1.5KE51A (ON Semiconductor) | Through-hole DO-201 package; identical electrical specs but no MSL Level 1 or AEC-Q101 validation | Requires wave soldering; unsuitable for fully SMT production lines or high-reliability automotive programs | Choose only for prototyping or non-automotive industrial repairs where board assembly process permits through-hole components |
Compared with SMAJ51A-E3/5A and 1.5KE51A, SMPC51AN-M3/H offers superior thermal performance on FR4 (RθJM ≤ 3 °C/W), automotive qualification, and 1.1 mm profile-critical for space-constrained, high-volume SMT manufacturing in automotive and industrial sectors.
Availability
SMPC51AN-M3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and telecom power rail protection requiring stable component supply, AEC-Q101 compliance, and high-volume tape-and-reel delivery.
Supply support for SMPC51AN-M3/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, automotive qualification, and green manufacturing.
The SMPC series was developed specifically for high-power, low-profile transient suppression in automotive and industrial applications where AEC-Q101 compliance, MSL Level 1 reflow, and minimal board footprint are essential design constraints.
FAQ
What is the polarity configuration of SMPC51AN-M3/H?
SMPC51AN-M3/H is a unidirectional TVS diode with anode-anode-cathode terminal arrangement. The cathode is marked by a band on the top surface. During normal operation, it blocks reverse current up to 51 V; during transients exceeding 56.7 V, it avalanches from cathode to both anodes, shunting surge current to ground. This configuration ensures precise clamping on positively biased lines.
Does SMPC51AN-M3/H meet AEC-Q101 requirements?
Yes, SMPC51AN-M3/H is AEC-Q101 qualified, as confirmed in the Vishay datasheet (Document Number 89116, Revision 17-Sep-2021). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for automotive applications such as engine control, ADAS sensors, and body electronics where reliability under thermal and mechanical stress is critical.
What is the maximum clamping voltage for SMPC51AN-M3/H under surge conditions?
The maximum clamping voltage (VC) for SMPC51AN-M3/H is 82.4 V at 18.2 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value represents the upper limit of voltage seen by protected circuitry during a full-rated 1500 W transient event, enabling accurate margin analysis for downstream ICs like microcontrollers or transceivers with known absolute maximum ratings.
Can SMPC51AN-M3/H be used in bidirectional protection circuits?
No, SMPC51AN-M3/H is strictly unidirectional and must not be used for bidirectional protection. Its internal structure supports conduction only from cathode to anodes. For AC or dual-polarity signal lines, a dedicated bidirectional TVS (e.g., SMPC51CA) or back-to-back unidirectional configuration is required. Using SMPC51AN-M3/H in reverse-biased configurations risks permanent breakdown or failure.
What is the thermal resistance from junction to mount (RθJM) for SMPC51AN-M3/H?
The typical thermal resistance from junction to mount (RθJM) for SMPC51AN-M3/H is 2.5 °C/W, with a maximum of 3 °C/W, per JEDEC 51-14 using the Transient Dual Interface Method. This low value reflects efficient heat transfer from the die to the PCB copper plane via the dual-anode thermal path, supporting sustained operation at elevated ambient temperatures when mounted on 2 oz FR4 with standard footprint.
SMPC51AN-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC51AN-M3/H FAQ
1.How can I place an order for SMPC51AN-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC51AN-M3/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 SMPC51AN-M3/H reliable?
The price and inventory of SMPC51AN-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC51AN-M3/H is usually 5 days.
3.What payment methods are accepted for SMPC51AN-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC51AN-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC51AN-M3/H?
SMPC51AN-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC51AN-M3/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 SMPC51AN-M3/H?
For technical support, including SMPC51AN-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC51AN-M3/H requirements.
6.How does Aetrix verify that SMPC51AN-M3/H is sourced from the original manufacturer or authorized distributors?
All SMPC51AN-M3/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 SMPC51AN-M3/H meets industry standards.
7.What is the process for return or replacement of SMPC51AN-M3/H?
All SMPC51AN-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC51AN-M3/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 SMPC51AN-M3/H part is unused and in its original packaging.
Return procedure for SMPC51AN-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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