My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA480AHM3_B/I
- Part No.:
- P4SMA480AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA480AHM3_B/I.pdf
- Description:
- TVS DIODE 408VWM 658VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA480AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-voltage surge protection in power rails and interface lines. It features a 480 V standoff voltage (VWM), 504 V maximum breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 0.46 A peak pulse current (IPPM), and clamps transients to 658 V at rated surge. It is used in industrial power supplies and telecom line cards to protect MOSFETs and DC-DC controllers from lightning-induced surges.
For engineers reviewing the P4SMA480AHM3_B/I datasheet, P4SMA480AHM3_B/I pinout, P4SMA480AHM3_B/I application, or P4SMA480AHM3_B/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMA (DO-214AC) package details, clamping performance under standardized surge waveforms, and direct alternative part comparisons for high-voltage TVS selection.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (456–504 V), it avalanches to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM).
Rated for 400 W peak pulse power per 10/1000 µs waveform with 0.01% duty cycle, it sustains repetitive surges only up to 300 W above 91 V - confirmed by derating curve Fig. 2. Thermal resistance RθJA is 120 °C/W on standard 0.2" × 0.2" copper pads, limiting continuous power dissipation to 3.3 W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 408 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC rail margin. |
| VBR (min/max) | 456 V / 504 V - breakdown occurs within this range at 1 mA test current; ensures predictable clamping onset. |
| VC @ IPPM | 658 V - clamped voltage during 0.46 A 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 400 W - peak surge energy handling capability under standard waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1 µA - reverse leakage at standoff voltage; minimizes standby power loss and avoids false triggering. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line (e.g., ground or return path); must be routed with low-inductance trace. |
| Cathode | Current exit terminal during reverse avalanche | Connected to higher-potential side (e.g., DC bus or signal line); carries full surge current during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against severe lightning-induced transients per IEC 61000-4-5 without external series impedance. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature, with <1 µA leakage at 408 V for minimal standby loading. |
| AEC-Q101 qualified (HM3 suffix) | Validates reliability for automotive power modules and industrial control units requiring extended thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C reflow) | Supports single-pass lead-free reflow assembly without popcorn effect or delamination risk. |
| SMA (DO-214AC) package | Standardized footprint compatible with automated pick-and-place; 5.28 mm × 4.50 mm body enables high-density PCB layout. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protecting AC/DC front-end rectifiers and bulk capacitors from lightning surges entering via mains input. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed across DC bus after bridge rectifier to clamp positive-going transients. Use Value: Limits voltage excursion to ≤658 V during 400 W surge, preventing overvoltage failure of 600 V-rated electrolytic capacitors and MOSFETs. |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors from induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: TVS connected between data pair and chassis ground to absorb common-mode transients before reaching magnetics. Use Value: Sub-1 ns response time and 658 V clamping prevent latch-up or gate oxide rupture in 10/100/1000BASE-T transceivers. |
| Automotive DC-DC Converter Input | Renewable Energy Inverter DC Link |
Use Scenario: Shielding 12 V/24 V automotive DC-DC converters from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly across input terminals to clamp 120 V/200 V spikes per ISO 7637-2 Pulse 5a/5b. Use Value: AEC-Q101 qualification and 150 °C TJ rating ensure survival in engine bay environments with repeated thermal stress. |
Use Scenario: Protecting IGBT gate drivers and sensing circuits in solar inverter DC link sections exposed to grid switching transients. IC Role / Device Role / Timing Role: High-VWM TVS placed across DC link capacitor bank to suppress fast-rising dV/dt events from stray inductance. Use Value: 408 V VWM provides margin above 350–450 V nominal DC link, while 658 V VC prevents overvoltage damage to isolated gate drivers. |
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-E3/5A | Same VWM (408 V), identical SMA package, but rated for 400 W only at TA = 25 °C; no AEC-Q101 qualification. | Commercial-grade use only; unsuitable for automotive or mission-critical industrial deployments requiring long-term reliability validation. | Select when cost sensitivity outweighs automotive qualification needs and ambient temperature remains ≤40 °C. |
| 1.5SMC480AHE3_A | Higher package thermal mass (SMC/DO-214AB), 400 W rating maintained up to 75 °C ambient; same VWM/VBR/VC specs. | Better thermal performance in high-power density designs; larger footprint (7.11 mm × 6.22 mm) requires PCB redesign. | Choose when board space allows and sustained surge repetition or elevated ambient temperatures (>60 °C) are expected. |
Compared with SMAJ480A-E3/5A, P4SMA480AHM3_B/I adds AEC-Q101 qualification and halogen-free compliance without sacrificing clamping performance; versus 1.5SMC480AHE3_A, it trades thermal headroom for 30% smaller footprint and lower assembly cost in space-constrained layouts.
Availability
P4SMA480AHM3_B/I is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive DC-DC converters, and renewable energy inverters requiring stable component supply across multi-year production cycles.
Supply support for P4SMA480AHM3_B/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 targets high-voltage transient suppression in harsh environments, delivering AEC-Q101-qualified TVS diodes with precise breakdown control and industry-standard SMA packaging for automated manufacturing.
FAQ
What is the maximum clamping voltage of the P4SMA480AHM3_B/I under a 10/1000 µs surge?
The P4SMA480AHM3_B/I clamps to a maximum of 658 V when subjected to its rated peak pulse current of 0.46 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA480AHM3_B/I maintains this clamping performance consistently due to its glass-passivated junction and controlled avalanche characteristics.
Is the P4SMA480AHM3_B/I suitable for automotive applications?
Yes, the P4SMA480AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA datasheet revision 09-Jan-2024. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per JESD22, making it suitable for automotive power modules, body control units, and DC-DC converters where reliability under thermal and electrical stress is mandatory. The P4SMA480AHM3_B/I operates up to +150 °C junction temperature, supporting under-hood deployment.
What does the "HM3" suffix indicate in P4SMA480AHM3_B/I?
The "HM3" suffix in P4SMA480AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 compliance, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. The "B" refers to the revision level for the 250–540 V voltage range, and "I" specifies 7500-unit tape-and-reel packaging on 13-inch reels. The P4SMA480AHM3_B/I meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow requirements.
How does the P4SMA480AHM3_B/I compare to bidirectional TVS diodes in surge protection?
The P4SMA480AHM3_B/I is unidirectional and intended for DC-biased lines where only positive-going transients require suppression - such as DC power rails or single-ended signal paths. Unlike bidirectional variants (e.g., P4SMA480CA), it cannot suppress negative surges without forward conduction, which would cause excessive power dissipation. Its 408 V VWM provides higher DC blocking margin than equivalent bidirectional parts (max VWM = 185 V), making the P4SMA480AHM3_B/I optimal for high-voltage DC protection where polarity is fixed and reverse conduction must be avoided.
What is the thermal resistance and power derating behavior of the P4SMA480AHM3_B/I?
The P4SMA480AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. Its 3.3 W steady-state power dissipation rating derates linearly above 50 °C ambient, dropping to zero at +150 °C. For example, at 85 °C ambient, maximum continuous power drops to ~2.1 W. This derating is critical when using the P4SMA480AHM3_B/I in enclosed industrial enclosures or near heat-generating components, as exceeding thermal limits risks premature failure.
P4SMA480AHM3_B/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:
- 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/I FAQ
1.How can I place an order for P4SMA480AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA480AHM3_B/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_B/I reliable?
The price and inventory of P4SMA480AHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for P4SMA480AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA480AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA480AHM3_B/I?
P4SMA480AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA480AHM3_B/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_B/I?
For technical support, including P4SMA480AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA480AHM3_B/I requirements.
6.How does Aetrix verify that P4SMA480AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P4SMA480AHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of P4SMA480AHM3_B/I?
All P4SMA480AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA480AHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for P4SMA480AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA480AHM3_B/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
