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Vishay General Semiconductor - Diodes Division SMPC28ANHM3/I
- Part No.:
- SMPC28ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC28ANHM3/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:7,950
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Product details
Overview
SMPC28ANHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® SMPC (TO-277A) package, designed for high-energy surge 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 (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - ideal for protecting MOSFETs and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMPC28ANHM3/I datasheet, SMPC28ANHM3/I pinout, SMPC28ANHM3/I application, or SMPC28ANHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, low-profile 1.1 mm height, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on FR4 PCBs with 2 oz copper.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 28.0 V stand-off voltage and rapidly transitions to low-impedance conduction above its 31.1–34.4 V breakdown threshold. Its 45.4 V clamping voltage at 33.0 A ensures downstream ICs experience minimal overvoltage during transient events such as inductive load switching or ESD.
The SMPC28ANHM3/I uses a planar junction structure in a dual-anode/single-cathode configuration (SMPCxxAN topology), enabling symmetric thermal dissipation when mounted with cathode on heatsink. Its 2.5 °C/W typical junction-to-mount thermal resistance supports reliable operation up to 150 °C junction temperature under pulsed conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.0 V - maximum continuous reverse operating voltage before significant leakage; defines safe operating margin for protected circuitry. |
| VBR min/max | 31.1 V / 34.4 V at 1.0 mA - guaranteed breakdown range ensuring consistent turn-on behavior across production lots. |
| VC @ IPPM | 45.4 V at 33.0 A (10/1000 μs) - clamping voltage limiting transient energy delivered to downstream components. |
| PPPM | 1500 W - peak pulse power handling capacity for standardized surge waveforms per IEC 61000-4-5. |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments and industrial enclosures. |
| Package | SMPC (TO-277A) - surface-mount, low-profile (1.1 mm height), AEC-Q101 qualified, MSL Level 1, halogen-free, RoHS-compliant. |
Pinout & Package
SMPC28ANHM3/I uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with cathode band marking, matte tin-plated leads, and dual-anode/single-cathode internal configuration. Mounting requires cathode-side thermal contact for optimal junction-to-mount thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | Electrically tied to Anode 2 internally; provides dual-path current entry for improved surge current sharing and thermal distribution. |
| Anode 2 | Secondary anode connection | Internally connected to Anode 1; enables symmetrical PCB pad layout and balanced thermal coupling to copper pour. |
| Cathode | Common cathode terminal | Marked by band; serves as the low-impedance discharge path during transients; recommended for direct heatsink attachment. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring robust transient immunity. |
| Low-profile height (1.1 mm) | Enables use in space-constrained modules such as battery management systems and compact motor drivers without compromising board clearance. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning, reducing manufacturing complexity and cost. |
| Unidirectional clamping | Provides precise overvoltage protection for DC-biased signal and power rails where reverse conduction must be blocked. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), critical for safeguarding high-speed interface ICs. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V power rails in engine control modules against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed upstream of LDO regulators and microcontrollers. Use Value: Limits voltage excursions to ≤45.4 V during 33 A surges, preventing latch-up or permanent damage to downstream 5 V logic. |
Use Scenario: Safeguarding analog output lines of pressure and temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry transient suppressor on 4–20 mA or 0–10 V signal paths exposed to relay-induced spikes. Use Value: Clamps induced transients within 1 ns while maintaining <1.0 μA leakage at 28 V, preserving signal accuracy and ADC resolution. |
| DC Motor Drive Gate Protection | Telecom Interface Surge Protection |
|
Use Scenario: Shielding high-side N-channel MOSFET gates in brushed DC motor controllers from inductive kickback. IC Role / Device Role / Timing Role: Fast-response clamping diode between gate and source, referenced to local ground. Use Value: Responds in <1 ns to suppress >100 V spikes, preventing gate oxide rupture and ensuring MOSFET reliability over 100k+ cycles. |
Use Scenario: Front-end protection for RS-485 transceivers in outdoor telecom base stations subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression stage before secondary filtering and common-mode chokes. Use Value: Handles 1500 W pulses per IEC 61000-4-5 Level 4, enabling compliance with EN 61000-4-5 without additional cascaded stages. |
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 | Same VWM (28 V) and PPPM (400 W), but lower 400 W rating and SMA package (higher RθJA = 150 °C/W). | Limited to lower-energy transients; not AEC-Q101 qualified; unsuitable for under-hood automotive use. | Select only for cost-sensitive industrial controls where 1500 W surge immunity is not required. |
| SMCJ28AHE3/73 | Same VWM (28 V), higher PPPM (3000 W), but larger SMC package (2.5 mm height) and no AEC-Q101 certification. | Better energy handling but incompatible with ultra-low-profile layouts; lacks automotive qualification documentation. | Choose when peak surge energy exceeds 1500 W and board height >2.5 mm is acceptable. |
Compared with SMAJ28A-E3/5A and SMCJ28AHE3/73, the SMPC28ANHM3/I uniquely combines AEC-Q101 qualification, 1500 W capability, and 1.1 mm profile - making it the only option for space-constrained, automotive-grade transient protection without trade-offs in reliability or footprint.
Availability
SMPC28ANHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC motor drive gate safeguarding requiring stable component supply across multi-year production programs.
Supply support for SMPC28ANHM3/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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMPC series was developed to deliver AEC-Q101-qualified, low-profile TVS solutions for next-generation automotive ECUs and compact industrial modules where thermal performance and mounting density are critical.
FAQ
What is the polarity configuration of the SMPC28ANHM3/I?
The SMPC28ANHM3/I is a unidirectional TVS diode with dual-anode/single-cathode construction (SMPCxxAN topology). The cathode is marked by a band on the package body, and the device conducts only when cathode voltage exceeds anode voltage by ≥31.1 V. This configuration blocks reverse current in DC-biased applications while providing precise clamping during positive transients.
Is SMPC28ANHM3/I suitable for automotive applications?
Yes, SMPC28ANHM3/I is AEC-Q101 qualified and specifically designated for automotive use via the "HM3" suffix. It meets stringent requirements for temperature cycling, humidity resistance, and mechanical shock - validated for deployment in engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh environmental conditions is mandatory.
What does the "I" suffix mean in SMPC28ANHM3/I?
The "I" suffix in SMPC28ANHM3/I indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 6500 units per reel. This format is optimized for high-volume automated SMT assembly lines and supports JIT inventory management for large-scale production programs using the SMPC28ANHM3/I.
How does SMPC28ANHM3/I compare to SMPC28A-M3/I?
SMPC28ANHM3/I is AEC-Q101 qualified and rated for automotive use, whereas SMPC28A-M3/I is industrial grade only. Both share identical electrical parameters (VWM = 28.0 V, VC = 45.4 V), but SMPC28ANHM3/I undergoes extended stress testing per AEC-Q101 - including HTGB, HTRB, and temperature cycling - making it the sole choice for safety-critical automotive designs.
What is the thermal performance of SMPC28ANHM3/I when mounted with cathode on heatsink?
When the cathode terminal of SMPC28ANHM3/I is thermally connected to a heatsink or large copper pour, its typical junction-to-mount thermal resistance is 2.5 °C/W. This enables sustained power dissipation up to 1.25 W at 25 °C ambient and supports reliable operation at junction temperatures up to +150 °C during repetitive surge events.
SMPC28ANHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®, eSMP™
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-277A (SMPC)
SMPC28ANHM3/I FAQ
1.How can I place an order for SMPC28ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC28ANHM3/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 SMPC28ANHM3/I reliable?
The price and inventory of SMPC28ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC28ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC28ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC28ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC28ANHM3/I?
SMPC28ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC28ANHM3/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 SMPC28ANHM3/I?
For technical support, including SMPC28ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC28ANHM3/I requirements.
6.How does Aetrix verify that SMPC28ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC28ANHM3/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 SMPC28ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC28ANHM3/I?
All SMPC28ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC28ANHM3/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 SMPC28ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC28ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC28ANHM3/I Tags
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