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Vishay General Semiconductor - Diodes Division SMPC33ANHM3/H
- Part No.:
- SMPC33ANHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC33ANHM3/H.pdf
- Description:
- TVS DIODE 33VWM 53.3VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:6,098
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Product details
Overview
SMPC33ANHM3/H 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 33 V stand-off voltage (VWM), 53.3 V maximum clamping voltage at 28.1 A peak pulse current, 1500 W peak pulse power rating with 10/1000 μs waveform, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the SMPC33ANHM3/H datasheet, SMPC33ANHM3/H pinout, SMPC33ANHM3/H application, or SMPC33ANHM3/H equivalent, this device is selected for robust overvoltage protection in automotive sensor interfaces, industrial power rails, and telecom line receivers where low-profile SMT placement and reliable transient immunity are required.
Technical Context
The SMPC33ANHM3/H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 36.7–40.6 V breakdown range (VBR at 1 mA). Its low incremental surge resistance and fast response time enable effective clamping of ESD and inductive switching transients before downstream ICs or MOSFETs are damaged.
Mounted on FR4 PCB with 2 oz copper, it delivers 1.25 W steady-state power dissipation at 25 °C and supports junction temperatures from –55 °C to +150 °C. The TO-277A (SMPC) package provides thermal path optimization with RθJM ≤ 3 °C/W when cathode is mounted to heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - Confirmed avalanche onset range for reliable turn-on threshold |
| VC @ IPPM | 53.3 V at 28.1 A - Clamped voltage during 10/1000 μs surge, limiting stress on protected circuitry |
| PPPM | 1500 W - Peak pulse power handling capability under standardized transient waveform |
| IR @ VWM | 1.0 μA - Low leakage ensures minimal standby power loss and signal integrity |
| Package | SMPC (TO-277A) - 3-terminal surface-mount package with 1.1 mm typical height for space-constrained layouts |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMPC33ANHM3/H uses the SMPC (TO-277A) package: a 3-terminal, low-profile surface-mount outline with cathode band marking. Terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 & Anode 2 | Parallel anode connections | Internally tied anodes provide dual-path conduction and lower effective dynamic resistance during surge |
| Cathode | Common cathode terminal | Marked with band; serves as single output node for clamping to ground or supply rail |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables use in ultra-thin modules and stacked PCB assemblies without mechanical interference |
| Unidirectional operation | Protects DC-biased lines such as automotive 12 V power rails or sensor supply outputs |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive ICs |
| AEC-Q101 qualified | Validated for automotive under-hood and chassis-mounted applications requiring extended temperature and lifetime reliability |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for industrial and consumer end equipment |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VDD and ground to clamp positive-going surges before they reach the ASIC or microcontroller. Use Value: With 53.3 V clamping at 28.1 A and AEC-Q101 qualification, SMPC33ANHM3/H ensures sustained operation in automotive environments where 33 V nominal systems experience up to 40 V transients. | Use Scenario: Safeguarding 24 V industrial PLC I/O modules against inductive kickback from solenoid and relay coils. IC Role / Device Role / Timing Role: Mounted across 24 V supply and ground to absorb repetitive 1500 W surges without degradation. Use Value: 1500 W PPPM rating and 1.25 W steady-state dissipation allow reliable long-term deployment in factory automation equipment with frequent switching events. |
| Telecom Line Receiver Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding Ethernet PHY or DSL line drivers from lightning-induced surges and EFT bursts on twisted-pair interfaces. IC Role / Device Role / Timing Role: Placed at line-side input of receiver ICs to limit common-mode transients before differential amplifiers. Use Value: 33 V VWM aligns with telecom interface voltage margins, while 53.3 V VC ensures receiver ICs remain within absolute maximum ratings during 10/1000 μs threats. | Use Scenario: Suppressing switch-mode power supply (SMPS) turn-on spikes and external surges at AC-DC adapter primary-side inputs. IC Role / Device Role / Timing Role: Connected between rectified DC bus and ground to protect bridge rectifier and bulk capacitor from overvoltage. Use Value: TO-277A package enables automated placement in high-volume adapter manufacturing, and 1.1 mm height accommodates compact enclosure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5A | DO-214AC (SMA) package; 33 V VWM; 53.3 V VC at 27.9 A; 400 W PPPM | Lower power rating limits use to sub-400 W surge environments; not AEC-Q101 qualified | Select SMAJ33A-E3/5A only for cost-sensitive industrial or consumer applications where automotive qualification and 1500 W surge immunity are not required. |
| 1.5KE33A | DO-201AD axial lead; 33 V VWM; 53.3 V VC at 28.1 A; 1500 W PPPM; through-hole mounting | Requires manual or wave soldering; incompatible with fully SMT production; no AEC-Q101 validation | Choose 1.5KE33A for prototyping or legacy through-hole designs where board real estate and automated assembly are not constraints. |
Compared with SMAJ33A-E3/5A and 1.5KE33A, SMPC33ANHM3/H uniquely combines 1500 W surge capability, AEC-Q101 qualification, and low-profile SMT packaging-making it the only option suitable for high-reliability automotive electronics requiring both performance and manufacturability.
Availability
SMPC33ANHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for SMPC33ANHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMPC series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, low-profile surge suppression in automotive, industrial, and communications infrastructure where space, thermal performance, and qualification rigor are critical.
FAQ
What is the breakdown voltage range of SMPC33ANHM3/H?
The SMPC33ANHM3/H has a specified breakdown voltage (VBR) range of 36.7 V to 40.6 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent avalanche initiation across production lots and temperature extremes, directly supporting its role as a precision clamping device in 33 V system protection schemes.
Is SMPC33ANHM3/H suitable for automotive applications?
Yes, SMPC33ANHM3/H is AEC-Q101 qualified and explicitly listed in Vishay's documentation as available in HM3 suffix for automotive-grade reliability. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD, making SMPC33ANHM3/H appropriate for under-hood and chassis-mounted automotive electronics.
What does the "HM3" suffix indicate in SMPC33ANHM3/H?
The "HM3" suffix in SMPC33ANHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JEDEC-standard MSL level 1 moisture sensitivity. It also specifies the H-packaging code (7-inch tape-and-reel, 1500 units per reel), distinguishing it from industrial-grade M3 variants and non-automotive AN versions.
How does the SMPC (TO-277A) package improve thermal performance?
The SMPC (TO-277A) package of SMPC33ANHM3/H provides a dedicated thermal path via the cathode terminal, achieving RθJM ≤ 3 °C/W when mounted to a heatsink. This allows SMPC33ANHM3/H to sustain higher surge duty cycles than standard SOD or SMA packages, especially in thermally constrained automotive and industrial enclosures.
Can SMPC33ANHM3/H be used in bidirectional configurations?
No, SMPC33ANHM3/H is strictly unidirectional and must be oriented with the cathode band toward the protected circuit's reference (typically ground). Bidirectional protection requires two SMPC33ANHM3/H devices in series opposition or a dedicated bidirectional TVS such as SMPC33CA; using SMPC33ANHM3/H in reverse polarity risks permanent failure.
SMPC33ANHM3/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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- 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)
SMPC33ANHM3/H FAQ
1.How can I place an order for SMPC33ANHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC33ANHM3/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 SMPC33ANHM3/H reliable?
The price and inventory of SMPC33ANHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC33ANHM3/H is usually 5 days.
3.What payment methods are accepted for SMPC33ANHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC33ANHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC33ANHM3/H?
SMPC33ANHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC33ANHM3/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 SMPC33ANHM3/H?
For technical support, including SMPC33ANHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC33ANHM3/H requirements.
6.How does Aetrix verify that SMPC33ANHM3/H is sourced from the original manufacturer or authorized distributors?
All SMPC33ANHM3/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 SMPC33ANHM3/H meets industry standards.
7.What is the process for return or replacement of SMPC33ANHM3/H?
All SMPC33ANHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC33ANHM3/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 SMPC33ANHM3/H part is unused and in its original packaging.
Return procedure for SMPC33ANHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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