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Vishay General Semiconductor - Diodes Division P4SMA480AHM3_B/H
- Part No.:
- P4SMA480AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA480AHM3_B/H.pdf
- Description:
- TVS DIODE 408VWM 658VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,690
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Product details
Overview
P4SMA480AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 480 V standoff voltage (VWM), 504 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It delivers clamping voltage of 658 V at 0.46 A peak pulse current and is AEC-Q101 qualified for automotive-grade transient protection on high-voltage DC rails.
For engineers reviewing the P4SMA480AHM3_B/H datasheet, P4SMA480AHM3_B/H pinout, P4SMA480AHM3_B/H application, or P4SMA480AHM3_B/H equivalent, key selection criteria include its 480 V VWM rating, 658 V VC clamping performance under 10/1000 µs surge, unidirectional polarity with cathode band marking, and halogen-free RoHS-compliant HM3 suffix for automotive reliability.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, leveraging an avalanche breakdown mechanism to divert transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while MSL Level 1 moisture sensitivity supports standard SMT reflow without preconditioning.
The device is optimized for single-pulse transients up to 400 W (derated to 300 W above 91 V), with thermal resistance RθJA = 120 °C/W and maximum junction temperature of +150 °C. Its 0.46 A IPPM at 658 V VC reflects precise energy-handling capability for high-impedance, low-current surge events in industrial and automotive power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 480 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 400–500 V systems. |
| VBR (Breakdown Voltage) | 456–504 V at 1 mA - Avalanche onset range; ensures reliable triggering within ±5% tolerance under standardized test conditions. |
| VC (Clamping Voltage) | 658 V at IPPM = 0.46 A - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for MOSFET/gate driver survivability. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Surge energy absorption capacity; derates to 300 W above 91 V per spec, confirming suitability for high-V applications. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement; enables automated placement and meets UL 94 V-0. |
| Qualification | AEC-Q101 qualified (HM3 suffix) - Validated for automotive underhood and powertrain applications per stress-test requirements. |
| Leakage Current | <1 µA at 480 V - Minimal standby power loss and signal integrity impact in high-impedance monitoring circuits. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode band marking on one end. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to system ground or low-side reference; forms return path for surge current. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 480 V DC bus); band-marked end indicates polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges on high-voltage industrial DC links without derating penalties below 91 V. |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across temperature (-65 °C to +150 °C), critical for automotive lifetime reliability. |
| AEC-Q101 qualification (HM3) | Validates performance under temperature cycling, humidity bias, and mechanical shock-required for engine control, battery management, and ADAS power stages. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without baking, reducing manufacturing complexity and cost in high-volume automotive assembly. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and automotive material compliance standards (e.g., GMW3172, Ford WSS-M99P9999-A1). |
Applications
| Industrial HV DC Link Protection | Automotive Battery Management Input |
|---|---|
|
Use Scenario: Protection of 400–500 V DC bus in solar inverters, EV chargers, and motor drives against switching transients and lightning-induced surges. IC Role / Device Role / Timing Role: Clamping-type TVS placed directly across DC input terminals to limit voltage excursions during IGBT/MOSFET turn-off. Use Value: 658 V clamping voltage ensures gate drivers and sensing ICs remain within absolute maximum ratings during 400 W surge events. |
Use Scenario: Input surge suppression on 48 V or 400 V battery monitor ICs in hybrid/electric vehicle BMS modules exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery+ and ground to clamp positive-going transients before they reach analog front-end or ADC inputs. Use Value: AEC-Q101 qualification and 480 V VWM provide validated reliability for 120 V load dump (ISO 7637-2 Pulse 5a) compliance in automotive environments. |
| Telecom Power Supply Input | EV Onboard Charger AC-DC Stage |
|
Use Scenario: Secondary-side transient protection on 48 V telecom rectifier outputs feeding base station RF amplifiers and backhaul interfaces. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after bulk filter capacitors to suppress residual line transients and ESD coupling into sensitive RF ICs. Use Value: Sub-1 µA leakage at 480 V prevents DC offset errors in precision current-sense circuits used for power regulation feedback. |
Use Scenario: DC-link overvoltage clamp in bidirectional OBCs handling 400–800 V battery charging, where regenerative braking induces high-energy voltage spikes. IC Role / Device Role / Timing Role: High-V TVS integrated into DC-link capacitor bank layout to absorb stored inductive energy during fast disconnection events. Use Value: 400 W 10/1000 µs rating matches typical OBC surge test profiles (e.g., ISO 16750-2), avoiding reliance on slower MOV-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ480A | Same VWM (480 V) and VC (658 V), but SMB package (DO-214AA); 600 W PPPM rating; higher thermal resistance (RθJA = 140 °C/W). | Higher power rating suits larger PCB footprints; less suitable for space-constrained automotive modules requiring SMA footprint. | Select SMBJ480A only if board layout allows larger package and higher surge margin is prioritized over density. |
| SMCJ480A | Same VWM and VC, but SMC package (DO-214AB); 1500 W PPPM; RθJA = 100 °C/W; larger footprint and higher IFSM (200 A). | Designed for high-energy industrial surge events (e.g., IEC 61000-4-5 combination wave); not AEC-Q101 qualified in standard variants. | Choose SMCJ480A for non-automotive 480 V systems needing >1 kW surge handling; avoid where AEC-Q101 or space constraints apply. |
Compared with SMBJ480A and SMCJ480A, P4SMA480AHM3_B/H offers optimal balance of AEC-Q101 compliance, SMA footprint compatibility, and verified 400 W surge performance-making it the preferred choice for automotive and space-limited industrial 480 V DC protection where qualification and density are mandatory.
Availability
P4SMA480AHM3_B/H is available at Aetrix Electronics and suitable for automotive battery management, industrial HV DC link protection, and telecom power supply input applications requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA480AHM3_B/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, designed specifically to meet stringent AEC-Q101, UL 497B, and IEC 61000-4-5 requirements with standardized SMA packaging.
FAQ
What is the clamping voltage of P4SMA480AHM3_B/H at its rated peak pulse current?
The P4SMA480AHM3_B/H has a maximum clamping voltage (VC) of 658 V when subjected to its specified peak pulse current (IPPM) of 0.46 A under a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay Document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA480AHM3_B/H maintains this clamping performance consistently due to its glass-passivated junction and tight VBR tolerance.
Is P4SMA480AHM3_B/H suitable for automotive applications?
Yes, P4SMA480AHM3_B/H is AEC-Q101 qualified (indicated by the HM3 suffix) and specifically designed for automotive use, including battery management systems, onboard chargers, and ADAS power supplies. Its halogen-free construction, MSL Level 1 rating, and validation across temperature cycling, humidity bias, and mechanical shock make it compliant with automotive reliability standards. The P4SMA480AHM3_B/H meets ISO 7637-2 Pulse 5a load dump requirements when applied with appropriate PCB layout.
What does the "HM3" suffix in P4SMA480AHM3_B/H signify?
The "HM3" suffix in P4SMA480AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with automotive material standards (e.g., GMW3172, Ford WSS-M99P9999-A1). The "B" indicates revision level for the 250–540 V range, and "H" specifies 7-inch tape-and-reel packaging (1800 units per reel). The P4SMA480AHM3_B/H thus combines environmental compliance, automotive qualification, and standardized logistics.
How does P4SMA480AHM3_B/H compare to bidirectional TVS diodes in the same series?
P4SMA480AHM3_B/H is unidirectional, meaning it conducts only during reverse-bias surges and blocks forward current-ideal for DC bus protection where polarity is fixed. Bidirectional variants (e.g., P4SMA480CA) would be inappropriate here, as they lack polarity discrimination and exhibit higher capacitance. The P4SMA480AHM3_B/H's cathode band marking ensures correct orientation, and its 480 V VWM rating applies only in reverse direction, unlike bidirectional types which specify symmetric VWM values.
What is the maximum operating temperature for P4SMA480AHM3_B/H?
The P4SMA480AHM3_B/H has a maximum junction temperature (TJ max.) of +150 °C and an operating junction/storage temperature range of -65 °C to +150 °C. Its thermal resistance (RθJA) is 120 °C/W under standard mounting conditions (0.2" × 0.2" copper pads), allowing direct calculation of allowable power dissipation at elevated ambient temperatures. This rating enables deployment in under-hood automotive locations and industrial enclosures where ambient temperatures exceed 105 °C, provided PCB thermal design meets Vishay's pad layout recommendations.
P4SMA480AHM3_B/H 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:
- Active
- 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:
- -
- 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_B/H FAQ
1.How can I place an order for P4SMA480AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA480AHM3_B/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 P4SMA480AHM3_B/H reliable?
The price and inventory of P4SMA480AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA480AHM3_B/H is usually 5 days.
3.What payment methods are accepted for P4SMA480AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA480AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA480AHM3_B/H?
P4SMA480AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA480AHM3_B/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 P4SMA480AHM3_B/H?
For technical support, including P4SMA480AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA480AHM3_B/H requirements.
6.How does Aetrix verify that P4SMA480AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P4SMA480AHM3_B/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 P4SMA480AHM3_B/H meets industry standards.
7.What is the process for return or replacement of P4SMA480AHM3_B/H?
All P4SMA480AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA480AHM3_B/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 P4SMA480AHM3_B/H part is unused and in its original packaging.
Return procedure for P4SMA480AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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