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Vishay General Semiconductor - Diodes Division P4SMA480AHM3_A/I
- Part No.:
- P4SMA480AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA480AHM3_A/I.pdf
- Description:
- TVS DIODE 408VWM 658VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA480AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for high-energy surge protection on DC power rails and signal lines. It features a 480 V breakdown voltage (VBR = 456–504 V at 1 mA), 400 W peak pulse power (10/1000 µs), clamping voltage of 658 V at 0.46 A, and operates up to +150 °C junction temperature - ideal for protecting industrial motor drives and telecom power supplies against lightning-induced transients.
For engineers reviewing the P4SMA480AHM3_A/I datasheet, P4SMA480AHM3_A/I pinout, P4SMA480AHM3_A/I application, or P4SMA480AHM3_A/I equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package compatibility with automated placement, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and verified clamping performance under repetitive 0.01% duty-cycle surges.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of transient overvoltages induced by inductive switching or ESD events. Its unidirectional configuration provides forward conduction capability while blocking reverse current until breakdown.
The device is rated for 400 W peak pulse power (10/1000 µs waveform) at 25 °C, derated linearly above TA = 25 °C per Figure 2, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 456 V / 504 V at 1 mA - defines precise voltage threshold where avalanche conduction begins under controlled test conditions |
| VWM | 408 V - maximum continuous reverse working voltage before leakage exceeds 1 µA; sets safe operating margin below breakdown |
| VC @ IPPM | 658 V at 0.46 A - clamped voltage during full-rated 400 W transient, directly limiting stress on downstream components |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity; derates to 300 W above 91 V per specification note |
| IFSM | 40 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction, critical for input rectifier protection |
| TJ max | +150 °C - maximum junction temperature enabling reliable operation in enclosed industrial enclosures without forced cooling |
| Package | SMA (DO-214AC) - standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal management |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to system ground or low-side return path; establishes polarity-dependent clamping direction |
| Cathode | Avalanche conduction terminal / protected line connection | Connected to line being protected (e.g., +48 V telecom rail); conducts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 48 V systems without derating |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood power modules |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709C requirements for environmentally constrained industrial and telecom applications |
| Low profile SMA package | 0.208" × 0.157" footprint enables dense PCB layouts in space-constrained telecom rectifiers and PoE injectors |
| Fast response time (<1 ns) | Clamps transients before sensitive MOSFET gates or controller ICs experience overvoltage stress, preserving system uptime |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus inputs in variable-frequency drives exposed to regenerative braking spikes and contactor bounce. IC Role / Device Role / Timing Role: Unidirectional TVS placed across +400 V DC link to clamp inductive kickback surges within nanoseconds. Use Value: Limits voltage overshoot to ≤658 V, preventing gate oxide rupture in 600 V IGBTs and extending drive lifetime in harsh factory environments. |
Use Scenario: Surge suppression on -48 V DC distribution rails in central office equipment subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary-level TVS on input stage of telecom rectifier modules, coordinated with upstream GDTs. Use Value: Absorbs 400 W pulses without degradation, maintaining <1 µA leakage at 408 V to avoid standby power loss in always-on systems. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Input protection for 12 V/24 V BCMs connected to vehicle battery rails prone to load dump (SAE J1113-11). IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional suppressor on main power input, mounted per recommended 5.0 mm × 5.0 mm pads. Use Value: Withstands 35 V/100 ms load dump events while maintaining stable VWM margin and passing HTOL at 150 °C. |
Use Scenario: DC-link protection in solar string inverters where PV arrays generate high-voltage transients during rapid cloud cover changes. IC Role / Device Role / Timing Role: Secondary clamping device parallel to MOVs on 600–1000 V DC strings, providing precise voltage limiting. Use Value: Delivers repeatable 456–504 V breakdown with ±5% tolerance, reducing thermal runaway risk compared to zinc-oxide varistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ480A | Same VBR range (456–504 V) and SMA package, but rated for 400 W only at TA ≤ 25 °C with no specified derating curve above 91 V | Lacks AEC-Q101 qualification and halogen-free certification; limited to commercial-grade industrial use | Select when cost sensitivity outweighs automotive qualification and environmental compliance requirements |
| 1.5SMC480A | Higher 1500 W rating but in larger SMC (DO-214AB) package; VC = 658 V at 2.3 A, requiring larger PCB area and different thermal layout | Better suited for primary-level AC-line protection where space permits; not drop-in compatible due to footprint mismatch | Choose when higher single-pulse energy absorption is required and board real estate allows SMC footprint |
Compared with SMAJ480A, P4SMA480AHM3_A/I offers guaranteed AEC-Q101 reliability and halogen-free compliance; versus 1.5SMC480A, it delivers identical clamping performance in a 35% smaller SMA footprint - enabling compact, automotive-qualified designs without layout redesign.
Availability
P4SMA480AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and renewable energy inverters requiring stable component supply with long-term lifecycle assurance.
Supply support for P4SMA480AHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series was developed for high-reliability transient suppression in space-constrained, high-voltage DC applications - targeting industrial automation, telecom infrastructure, and automotive electrification systems where consistent clamping and long-term stability are critical.
FAQ
What is the maximum clamping voltage of the P4SMA480AHM3_A/I under rated surge conditions?
The P4SMA480AHM3_A/I has a maximum clamping voltage (VC) of 658 V at its rated peak pulse current of 0.46 A, measured using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 658 V during a 400 W transient event. The P4SMA480AHM3_A/I maintains this clamping performance with minimal variation due to its tightly controlled avalanche characteristics.
Is the P4SMA480AHM3_A/I suitable for automotive applications?
Yes, the P4SMA480AHM3_A/I is AEC-Q101 qualified (indicated by the HM3 suffix) and specifically tested for automotive reliability including temperature cycling, high-temperature reverse bias, and mechanical shock. Its halogen-free, RoHS-compliant construction and operation up to +150 °C junction temperature make it appropriate for under-hood body control modules and power distribution units. The P4SMA480AHM3_A/I meets all stress-test requirements defined in the AEC-Q101 standard for discrete semiconductors.
What does the "HM3" suffix signify in P4SMA480AHM3_A/I?
The "HM3" suffix in P4SMA480AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade variants like E3 or M3. The "H" indicates halogen-free molding compound, "M" confirms AEC-Q101 qualification, and "3" specifies compliance with JESD201 Class 2 whisker resistance. The "_A/I" further specifies revision A and 13-inch tape-and-reel packaging (7500 units per reel). This full suffix ensures traceable, automotive-grade material content for the P4SMA480AHM3_A/I.
How does the P4SMA480AHM3_A/I compare to bidirectional TVS diodes in surge protection?
The P4SMA480AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed - offering lower leakage current (<1 µA at 408 V) and higher surge current capability in the forward direction compared to bidirectional equivalents. Unlike bidirectional devices (e.g., P4SMA480CA), it cannot protect AC signals or floating buses. For +48 V telecom rails or automotive battery inputs, the P4SMA480AHM3_A/I provides superior VWM margin and tighter VBR tolerance, making it the preferred choice for polarized DC systems.
What PCB layout considerations are required for optimal thermal performance of the P4SMA480AHM3_A/I?
For optimal thermal performance, the P4SMA480AHM3_A/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. These pads provide necessary heat spreading to achieve the rated 400 W pulse power and maintain RθJA = 120 °C/W. Avoid narrow traces or thermal reliefs on these pads; use multiple vias to inner-layer ground planes if ambient temperatures exceed 70 °C. The P4SMA480AHM3_A/I's thermal design is validated only with this pad layout.
P4SMA480AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 408V
- Voltage - Breakdown (Min):
- 456V
- Voltage - Clamping (Max) @ Ipp:
- 658V
- Current - Peak Pulse (10/1000µs):
- 460mA
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA480AHM3_A/I FAQ
1.How can I place an order for P4SMA480AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA480AHM3_A/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 P4SMA480AHM3_A/I reliable?
The price and inventory of P4SMA480AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA480AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA480AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA480AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA480AHM3_A/I?
P4SMA480AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA480AHM3_A/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 P4SMA480AHM3_A/I?
For technical support, including P4SMA480AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA480AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA480AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA480AHM3_A/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 P4SMA480AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA480AHM3_A/I?
All P4SMA480AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA480AHM3_A/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 P4SMA480AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA480AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA480AHM3_A/I Tags
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