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Vishay General Semiconductor - Diodes Division SMPC43ANHM3/I
- Part No.:
- SMPC43ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC43ANHM3/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:7,563
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Product details
Overview
SMPC43ANHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on power and signal lines. It features a 43.0 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial power rails.
For engineers reviewing the SMPC43ANHM3/I datasheet, SMPC43ANHM3/I pinout, SMPC43ANHM3/I application, or SMPC43ANHM3/I equivalent, key selection criteria include AEC-Q101 qualification, TO-277A (SMPC) package compatibility, unidirectional clamping behavior, thermal resistance (RθJA ≤ 100 °C/W), and compliance with JESD22-B102 solderability standards.
Technical Context
This device operates as a silicon avalanche diode optimized for fast response (<1 ns) to transient overvoltages induced by inductive load switching or ESD events. Its unidirectional polarity requires cathode-band orientation matching circuit ground reference, and it delivers low incremental surge resistance for stable clamping under repetitive surges up to TJ = 150 °C.
The SMPC43ANHM3/I is rated for 1.25 W steady-state power dissipation on FR4 PCB with 2 oz copper, and its thermal performance follows JEDEC 51-2A (RθJA) and 51-14 (RθJM = 2.5–3.0 °C/W) standards. It meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 47.8 V / 52.8 V at 1.0 mA - ensures reliable avalanche turn-on within defined tolerance band |
| VC @ IPPM | 69.4 V at 21.6 A (10/1000 μs) - defines worst-case voltage seen by protected IC during surge |
| PPPM | 1500 W - peak transient energy absorption capability without failure |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| RθJA | ≤100 °C/W - limits junction temperature rise on standard FR4 layout, critical for reliability |
| Polarity | Unidirectional - requires correct cathode-to-ground orientation; not suitable for AC or bidirectional lines |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, 3-terminal configuration with cathode band marking. Dimensions conform to JEDEC TO-277A: 4.80 × 4.40 × 1.10 mm (L × W × H), matte tin-plated leads, halogen-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | Connected to protected line (e.g., 12 V rail or sensor supply); forms one side of avalanche junction |
| Anode 2 | Secondary anode connection | Electrically tied internally to Anode 1; provides mechanical stability and current sharing in high-surge designs |
| Cathode (band end) | Common cathode terminal | Must be connected to system ground or low-impedance return path; clamping occurs when voltage exceeds VBR relative to this node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor modules |
| Very low profile (1.1 mm height) | Enables placement beneath low-clearance shields or in space-constrained modules like ECUs and battery management systems |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns at 260 °C peak |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream MOSFETs and microcontrollers |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance requirements for global OEM and industrial equipment shipments |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VDD and chassis ground to clamp transients before they reach the ASIC or MCU input pins. Use Value: With 69.4 V clamping at 21.6 A, SMPC43ANHM3/I prevents latch-up or gate oxide damage in 45 V-rated automotive-grade ICs during 12 V system surges. | Use Scenario: Safeguarding 48 V DC power distribution networks in factory automation controllers against inductive kickback from solenoid drivers and motor starters. IC Role / Device Role / Timing Role: Mounted directly across input terminals of DC-DC converters or PMICs to absorb 1500 W surges without derating. Use Value: Delivers 1500 W peak pulse power handling while maintaining <1.1 mm height - enabling compact, high-density board layouts in DIN-rail mounted PLCs. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding Ethernet PHY power pins and auxiliary bias rails in PoE-powered switches and base stations from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed upstream of LDO regulators feeding PHY ICs, referenced to local ground plane with minimal trace inductance. Use Value: Fast response time (<1 ns) and 43.0 V VWM ensure compatibility with 48 V PoE+ systems while clamping below 70 V to protect 50 V-rated components. | Use Scenario: Suppressing switch-mode power supply (SMPS) turn-on spikes and external ESD events at the AC-DC adapter primary-side rectifier output. IC Role / Device Role / Timing Role: Connected between bulk capacitor positive terminal and ground to limit voltage overshoot during cold-start or line surge conditions. Use Value: RθJA ≤ 100 °C/W and 1.25 W steady-state PD allow reliable operation without heatsinking in sealed plastic enclosures typical of wall-wart adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/5A | Same VWM (43 V) and VC (69.4 V), but SMA package (higher RθJA ≈ 150 °C/W), lower PPPM (400 W) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when cost or legacy footprint drives choice, but avoid in automotive or high-reliability thermal environments |
| TPSMD43A | Identical VWM and VC, same TO-277A package, but rated for 1700 W PPPM and higher IPPM (23.5 A) | Designed for extended surge duty cycles; slightly higher leakage at VWM (5 μA vs. 1 μA) | Prefer for applications requiring margin beyond ISO 16750-2 Pulse 5b or IEC 61000-4-5 Level 4 testing |
Compared with SMAJ43A-E3/5A and TPSMD43A, the SMPC43ANHM3/I uniquely combines AEC-Q101 qualification, 1500 W PPPM, and 1.1 mm profile in TO-277A - making it optimal for space-constrained automotive modules where thermal robustness and qualification compliance are non-negotiable.
Availability
SMPC43ANHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial 48 V power rails, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMPC43ANHM3/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 application-specific performance.
The SMPC series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and low-profile packaging are essential.
FAQ
What is the clamping voltage of the SMPC43ANHM3/I under a 10/1000 μs surge?
The SMPC43ANHM3/I has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 21.6 A with a 10/1000 μs waveform. This value is measured across the device terminals and represents the upper bound voltage imposed on the protected circuit during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the SMPC43ANHM3/I qualified for automotive applications?
Yes, the SMPC43ANHM3/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the SMPC22AN through SMPC85AN series. This qualification covers stress tests including HTGB, HTRB, TCT, and ESD, validating its suitability for under-hood and cabin-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What does the "HM3/I" suffix indicate in SMPC43ANHM3/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 6500 units. This ordering code ensures consistent material compliance and automated assembly readiness per J-STD-002 and JESD22-B102 standards.
Can SMPC43ANHM3/I be used in bidirectional signal lines?
No, the SMPC43ANHM3/I is strictly unidirectional and must be oriented with its cathode band toward ground. It is unsuitable for AC-coupled or bidirectional data lines (e.g., USB, RS-485) unless paired with a second device in anti-parallel configuration - which is not recommended due to mismatched VBR tolerances and increased board area.
What is the thermal resistance junction-to-ambient (RθJA) for SMPC43ANHM3/I?
The SMPC43ANHM3/I has a maximum RθJA of 100 °C/W when mounted on a standard FR4 PCB with 2 oz copper and the recommended pad layout per JEDEC TO-277A. This value assumes no additional heatsinking and is critical for calculating junction temperature rise under steady-state power dissipation of 1.25 W at TA = 25 °C.
SMPC43ANHM3/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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 21.6A
- 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)
SMPC43ANHM3/I FAQ
1.How can I place an order for SMPC43ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC43ANHM3/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 SMPC43ANHM3/I reliable?
The price and inventory of SMPC43ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC43ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC43ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC43ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC43ANHM3/I?
SMPC43ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC43ANHM3/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 SMPC43ANHM3/I?
For technical support, including SMPC43ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC43ANHM3/I requirements.
6.How does Aetrix verify that SMPC43ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC43ANHM3/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 SMPC43ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC43ANHM3/I?
All SMPC43ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC43ANHM3/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 SMPC43ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC43ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC43ANHM3/I Tags
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