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Vishay General Semiconductor - Diodes Division P4SMA56AHM3_A/I
- Part No.:
- P4SMA56AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56AHM3_A/I.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,661
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Product details
Overview
P4SMA56AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 56 V breakdown voltage (VBR = 53.2–58.8 V at 1 mA), 47.8 V standoff voltage (VWM), and 77.0 V clamping voltage (VC) at 5.2 A peak pulse current - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the P4SMA56AHM3_A/I datasheet, P4SMA56AHM3_A/I pinout, P4SMA56AHM3_A/I application, or P4SMA56AHM3_A/I equivalent, this device delivers AEC-Q101 qualification, 400 W peak pulse power (10/1000 µs), low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for under-hood automotive modules and high-reliability industrial controllers requiring robust ESD and surge immunity.
Technical Context
The P4SMA56AHM3_A/I operates as a unidirectional clamping TVS diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its 77.0 V clamping voltage ensures safe voltage limiting during 5.2 A 10/1000 µs surges while maintaining 47.8 V DC standoff capability - enabling direct placement across sensitive 50 V-rated power rails or I/O lines.
It features AEC-Q101 qualification and halogen-free RoHS compliance (HM3 suffix), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. The SMA package supports automated SMT assembly and meets UL 94 V-0 flammability rating, with cathode band marking for polarity identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise breakdown threshold for reliable clamping onset |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 77.0 V at 5.2 A - clamped voltage during 400 W transient, protecting downstream 80 V-rated components |
| PPPM | 400 W (10/1000 µs waveform) - sustains high-energy surges without failure in automotive load-dump scenarios |
| IFSM | 40 A (8.3 ms half-sine) - handles repetitive inrush or fault currents without bond-wire fusing |
| TJ max | +150 °C - enables operation in under-hood environments and sealed industrial enclosures |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMT footprint with 5.0 mm × 5.0 mm copper pad thermal design |
Pinout & Package
SMA (DO-214AC) surface-mount package: 2-terminal, molded epoxy case with matte tin-plated leads; cathode identified by black band on body; dimensions 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); MSL Level 1, reflow-compatible up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected circuit; enables unidirectional clamping to ground |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to higher-potential rail or signal line; defines clamping direction and polarity-sensitive protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JESD22 |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and IPC-1752A; eliminates brominated flame retardants for safer end-of-life processing |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 5a load-dump transients in 12 V vehicle systems without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs - critical for 5 V, 3.3 V, and 24 V logic interfaces |
| Fast response time (<1 ns) | Clamps transients before propagation into sensitive analog front-ends or microcontroller I/O pins |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load-dump spikes during battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply and ground, clamping transients before they reach LDOs and MCU VDD. Use Value: Maintains system uptime by preventing latch-up or permanent damage during 100 V/400 W pulses per ISO 16750-2. |
Use Scenario: Shields 24 V digital input optocoupler circuits from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS on input line, conducting only during >47.8 V transients to preserve signal integrity during normal operation. Use Value: Enables >100,000 surge cycles without parameter drift - verified per IEC 61000-4-5 Level 4 testing. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Driver Board |
Use Scenario: Guards AC/DC converter primary-side control ICs against lightning-induced surges coupled through mains input. IC Role / Device Role / Timing Role: Secondary-side clamping device across DC bus rails, triggered only during overvoltage faults exceeding VWM. Use Value: Limits peak voltage to 77.0 V, ensuring safe operation of 100 V-rated MOSFET gate drivers and feedback optos. |
Use Scenario: Suppresses commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals, diverting inductive kickback energy away from H-bridge FETs. Use Value: Reduces EMI emissions by 12 dBµV in 30–230 MHz band and extends MOSFET lifetime by 3× vs. unprotected designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Higher VBR (55–61 V), same VC (93.6 V), SMB package (larger footprint, 1.5× thermal mass) | Lower clamping ratio not achieved; requires PCB layout change due to larger SMB (DO-214AA) footprint | Select when higher thermal margin is needed and board space allows 5.3 mm × 4.6 mm package |
| 1.5KE56A | Through-hole DO-201 package, identical VBR/VC, but 1.5 kW peak power rating (not required for most SMT designs) | Not suitable for automated SMT production; incompatible with reflow profiles optimized for surface-mount TVS | Choose only for legacy through-hole designs or prototyping where manual assembly is acceptable |
Compared with SMBJ58A and 1.5KE56A, the P4SMA56AHM3_A/I provides optimal balance of AEC-Q101 qualification, compact SMA footprint, and precise 47.8 V standoff - making it the preferred choice for new automotive and industrial SMT designs requiring zero layout revision and guaranteed automotive reliability.
Availability
P4SMA56AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power supply surge hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA56AHM3_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-volume, high-reliability transient suppression in automotive, industrial, and consumer power systems - delivering standardized TVS performance in compact, AEC-Q101-qualified surface-mount packages.
FAQ
What is the clamping voltage of the P4SMA56AHM3_A/I under a 10/1000 µs surge?
The P4SMA56AHM3_A/I clamps to 77.0 V at 5.2 A peak pulse current under a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the maximum voltage seen by protected circuitry during transient events - critical for ensuring compatibility with 80 V-rated downstream components. The P4SMA56AHM3_A/I maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is the P4SMA56AHM3_A/I suitable for automotive applications?
Yes, the P4SMA56AHM3_A/I is AEC-Q101 qualified and specifically designated for automotive use via the HM3 suffix (halogen-free, RoHS-compliant, and automotive-grade). It has passed stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - validating its suitability for under-hood modules, body control units, and infotainment power supplies. The P4SMA56AHM3_A/I is referenced in Vishay's automotive-grade product roadmap and carries full PPAP documentation support.
What does the "HM3_A/I" suffix mean in P4SMA56AHM3_A/I?
The "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction; "A" indicates the revision level (per Vishay's ordering nomenclature for P4SMA6.8A–P4SMA220A series); and "I" specifies packaging in 13-inch tape-and-reel format with 7500 units per reel. This full suffix confirms the P4SMA56AHM3_A/I meets automotive reliability standards, environmental compliance requirements, and automated SMT assembly logistics - distinguishing it from commercial-grade (E3/M3) or non-automotive variants.
How does the P4SMA56AHM3_A/I compare to bidirectional TVS diodes like P4SMA56CA?
The P4SMA56AHM3_A/I is unidirectional and intended for DC rail protection where polarity is fixed (e.g., 12 V supply to ground), offering tighter VBR tolerance and lower leakage at VWM. In contrast, P4SMA56CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485, audio), with symmetrical clamping in both directions but higher leakage above 10 µA. The P4SMA56AHM3_A/I cannot replace P4SMA56CA in AC-coupled applications due to polarity dependence - selection must match circuit topology and transient polarity expectations.
What is the maximum operating junction temperature for the P4SMA56AHM3_A/I?
The P4SMA56AHM3_A/I has a maximum junction temperature (TJ) of +150 °C, validated per JEDEC JESD22-A108. This rating enables reliable operation in high-ambient environments such as engine compartments, enclosed industrial drives, and sealed telecom power supplies. Derating curves in the datasheet show that at 100 °C ambient, the device retains >70 % of its 400 W peak pulse capability - confirming sustained performance in thermally demanding deployments of the P4SMA56AHM3_A/I.
P4SMA56AHM3_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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4SMA56AHM3_A/I FAQ
1.How can I place an order for P4SMA56AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56AHM3_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 P4SMA56AHM3_A/I reliable?
The price and inventory of P4SMA56AHM3_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 P4SMA56AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA56AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56AHM3_A/I?
P4SMA56AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56AHM3_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 P4SMA56AHM3_A/I?
For technical support, including P4SMA56AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA56AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA56AHM3_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 P4SMA56AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA56AHM3_A/I?
All P4SMA56AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56AHM3_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 P4SMA56AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA56AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA56AHM3_A/I Tags
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