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Vishay General Semiconductor - Diodes Division SMPC28AN-M3/I
- Part No.:
- SMPC28AN-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC28AN-M3/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMPC28AN-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® Series, designed for robust overvoltage protection of sensitive electronics. It features a 28.0 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V maximum clamping voltage (VC) at 33.0 A peak pulse current, and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive sensor modules and industrial motor controllers.
For engineers reviewing the SMPC28AN-M3/I datasheet, SMPC28AN-M3/I pinout, SMPC28AN-M3/I application, or SMPC28AN-M3/I equivalent, key selection criteria include clamping performance under 33 A surge, thermal resistance (RθJA ≤ 100 °C/W), AEC-Q101 qualification status, TO-277A package footprint compatibility, and halogen-free RoHS-compliant construction.
Technical Context
This TVS diode operates in avalanche mode to clamp transient overvoltages induced by inductive load switching or ESD events. Its unidirectional polarity requires cathode connection to the protected line and anode to ground, with clamping action triggered only when reverse voltage exceeds VBR (31.1–34.4 V). The device sustains 1500 W peak pulse power for 10/1000 μs transients while maintaining VC ≤ 45.4 V at IPPM = 33.0 A.
Thermally, it uses the SMPC (TO-277A) package with matte tin-plated leads solderable per J-STD-002, rated for TJ = –55 to +150 °C, and meets MSL Level 1 (260 °C peak reflow). It is AEC-Q101 qualified (indicated by "AN" suffix and HM3 ordering code variants), making it suitable for automotive-grade designs requiring validated reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 31.1 V / 34.4 V at IT = 1.0 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 45.4 V at 33.0 A - limits downstream voltage stress during worst-case 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy handling capacity per JEDEC standard waveform |
| RθJA | ≤ 100 °C/W - junction-to-ambient thermal resistance on FR4 PCB with 2 oz copper |
| Polarity | Unidirectional - requires correct cathode-to-line orientation for functional protection |
| Package | SMPC (TO-277A) - 3-pin surface-mount outline with 1.1 mm typical height and 0.189" x 0.173" footprint |
Pinout & Package
The SMPC28AN-M3/I uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with cathode band marking, 1.1 mm typical height, and JEDEC-compliant dimensions (0.189" × 0.173" body). Terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 & Anode 2 | Common anode connection | Internally tied anodes - both pins must be connected to system ground for proper clamping path |
| Cathode | Protected line input | Single cathode terminal connects to the line being protected (e.g., 24 V supply rail or CAN_H) |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile | 1.1 mm typical height - enables use in space-constrained automotive ECUs and portable industrial sensors |
| AEC-Q101 qualified | Validated for automotive applications - supports deployment in ADAS camera modules and body control units without additional qualification |
| Low incremental surge resistance | Enables tighter clamping (VC = 45.4 V @ 33 A) - reduces voltage overshoot on protected ICs during fast transients |
| Halogen-free & RoHS-compliant | M3 suffix indicates industrial-grade compliance - satisfies environmental requirements for global OEM BOMs |
| MSL Level 1 rating | 260 °C peak reflow compatibility - allows single-pass assembly with standard lead-free SMT processes |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus transceivers and Hall-effect position sensors in engine control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply line and chassis ground to clamp transients before they reach analog front-end ICs. Use Value: Clamps 33 A surges to ≤45.4 V, preventing latch-up or damage to 5 V/12 V sensor ICs while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding digital I/O lines of PLC output modules driving solenoids and contactors subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC control outputs, absorbing repetitive 1500 W spikes without degradation. Use Value: Withstands >1000 surges at rated PPPM due to low thermal resistance (RθJM ≤ 3 °C/W), ensuring long-term reliability in factory automation systems. |
| Telecom Power Rail Protection | Consumer Appliance Control Board |
Use Scenario: Guarding 48 V PoE-powered Ethernet switch ports against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC/DC converters and PHY ICs. Use Value: Fast response time and 45.4 V clamping limit enable compliance with IEC 61000-4-5 Level 4 (4 kV) testing when combined with series impedance. | Use Scenario: Shielding microcontroller GPIOs and relay drivers in smart washing machine control boards from ESD and relay coil flyback. IC Role / Device Role / Timing Role: Point-of-load TVS on 5 V/3.3 V rails and isolated signal paths feeding user interface components. Use Value: 1.1 mm height and automated placement compatibility reduce board area and assembly cost versus through-hole alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/5A | DO-214AC package; 28 V VWM; 43.5 V VC @ 34.5 A; RθJA ≈ 125 °C/W | Higher thermal resistance; not AEC-Q101 qualified; lower mounting density | Acceptable for non-automotive industrial use where board space and qualification are less critical |
| SMCJ28A | DO-214AB package; same VWM/VC specs; 1500 W PPPM; RθJA ≈ 110 °C/W; no AEC-Q101 variant | Larger footprint (0.275" × 0.255"); higher profile (2.3 mm); no automotive qualification path | Preferred where higher surge margin is needed and space permits; unsuitable for AEC-Q101-mandated designs |
Compared with SMAJ28A-E3/5A and SMCJ28A, SMPC28AN-M3/I delivers superior thermal performance (RθJA ≤ 100 °C/W), AEC-Q101 qualification, and 45% lower profile - enabling compact, automotive-grade protection in next-generation ECUs and ADAS subsystems.
Availability
SMPC28AN-M3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor drive I/O protection, and telecom power rail safeguarding requiring stable component supply across high-volume production cycles.
Supply support for SMPC28AN-M3/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, MOSFETs, and protection devices with emphasis on reliability and application-specific validation.
The eSMP® Series - including SMPC28AN-M3/I - was developed for high-density, automotive-qualified transient suppression in space-constrained environments where low profile, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMPC28AN-M3/I at its rated peak pulse current?
The SMPC28AN-M3/I has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 33.0 A, measured using a 10/1000 μs waveform per Figure 1 in Vishay document 89116. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events, directly impacting downstream IC survivability.
Is SMPC28AN-M3/I AEC-Q101 qualified?
Yes, SMPC28AN-M3/I is AEC-Q101 qualified. The "AN" suffix in the part number explicitly denotes AEC-Q101 qualification per Vishay's ordering information table (Document 89116, page 3), and the device meets all stress test requirements for automotive applications including temperature cycling, HTRB, and ESD.
What does the "M3/I" suffix indicate in SMPC28AN-M3/I?
The "M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction; "I" specifies packaging in 13-inch diameter plastic tape and reel with 6500 units per reel. This configuration supports high-speed SMT placement and complies with environmental standards required for global electronics manufacturing.
How is the polarity configured on SMPC28AN-M3/I?
SMPC28AN-M3/I is unidirectional with cathode marked by a band on the package. The cathode terminal connects to the line being protected (e.g., 24 V rail), while both anode terminals must be connected to system ground to complete the clamping path - confirmed by the SMPCxxAN pinout diagram in Vishay document 89116, page 2.
What is the thermal resistance specification for SMPC28AN-M3/I?
SMPC28AN-M3/I has a maximum junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on a standard FR4 PCB with 2 oz copper, per JEDEC 51-2A. Its junction-to-mount thermal resistance (RθJM) is ≤3.0 °C/W, enabling effective heat transfer to heatsink-equipped layouts in high-power industrial applications.
SMPC28AN-M3/I 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SMPC28AN-M3/I FAQ
1.How can I place an order for SMPC28AN-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC28AN-M3/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 SMPC28AN-M3/I reliable?
The price and inventory of SMPC28AN-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC28AN-M3/I is usually 5 days.
3.What payment methods are accepted for SMPC28AN-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC28AN-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC28AN-M3/I?
SMPC28AN-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC28AN-M3/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 SMPC28AN-M3/I?
For technical support, including SMPC28AN-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC28AN-M3/I requirements.
6.How does Aetrix verify that SMPC28AN-M3/I is sourced from the original manufacturer or authorized distributors?
All SMPC28AN-M3/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 SMPC28AN-M3/I meets industry standards.
7.What is the process for return or replacement of SMPC28AN-M3/I?
All SMPC28AN-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC28AN-M3/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 SMPC28AN-M3/I part is unused and in its original packaging.
Return procedure for SMPC28AN-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC28AN-M3/I Tags
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