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Vishay General Semiconductor - Diodes Division P4SMA56AHM3/H
- Part No.:
- P4SMA56AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56AHM3/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,356
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Product details
Overview
P4SMA56AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 47.8 V standoff voltage (VWM), 77.0 V maximum clamping voltage (VC) at 5.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the P4SMA56AHM3/H datasheet, P4SMA56AHM3/H pinout, P4SMA56AHM3/H application, or P4SMA56AHM3/H equivalent, this device is selected for robust overvoltage protection where AEC-Q101 qualification, low incremental surge resistance, and fast response time (<1 ns) are required in space-constrained PCB layouts.
Technical Context
The P4SMA56AHM3/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while thermal resistance RθJA = 120 °C/W supports operation up to TJ = 150 °C under defined pad layout conditions.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) with 10/1000 µs waveform compliance and meets J-STD-020 MSL Level 1 (260 °C reflow peak). The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA test current - defines precise clamping onset range for design margining |
| VWM | 47.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 77.0 V at 5.2 A - clamped voltage seen by protected circuit during worst-case transient |
| PPPM | 400 W (10/1000 µs) - energy-handling capacity for common lightning/inductive-spike waveforms |
| IFSM | 40 A (8.3 ms half-sine) - surge withstand capability for power-line fault events |
| TJ max | 150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMD footprint with 5.0 mm × 5.0 mm copper pad requirement |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side (e.g., VIN, signal line); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations without compromising surge performance or thermal stability |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients from inductive switching or ESD without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs during clamping event |
| Fast response time (<1 ns) | Engages before sensitive components experience damaging voltage overshoot |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in engine control modules against load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges exceeding 47.8 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs during ISO 16750-2 compliant tests. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to shunt transient energy before it reaches ADC front-end or op-amp inputs. Use Value: Maintains signal integrity and avoids false readings or reset events in harsh factory-floor environments. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter, sized for 400 W pulse handling per IEEE 802.3bt requirements. Use Value: Enables single-stage protection architecture without additional series impedance, reducing BOM count and board area. |
Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in portable audio devices and smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND, leveraging low capacitance (<100 pF at VWM) to avoid signal distortion. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) without affecting USB 2.0 data eye diagram. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ56A | Same VBR range (53.2–58.8 V), but rated for 400 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select SMAJ56A if AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| SMCJ56A | Higher 1500 W peak pulse power rating, larger SMC (DO-214AB) package, same VBR and VC specs | Requires more PCB area; used where higher surge immunity (e.g., AC mains input) is needed | Choose SMCJ56A when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits larger footprint |
Compared with SMAJ56A, P4SMA56AHM3/H adds AEC-Q101 qualification and halogen-free compliance without sacrificing clamping performance; versus SMCJ56A, it trades surge capacity for compact SMA packaging - making it optimal for automotive ECUs and space-limited industrial controllers.
Availability
P4SMA56AHM3/H is available at Aetrix Electronics and suitable for automotive power supply protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA56AHM3/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 - engineered for consistent clamping behavior, low leakage, and robust surge endurance under thermal stress.
FAQ
What is the breakdown voltage tolerance of P4SMA56AHM3/H?
The P4SMA56AHM3/H has a breakdown voltage VBR specified from 53.2 V to 58.8 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 56 V rating. This tight tolerance ensures predictable clamping onset across production lots and supports reliable margining in safety-critical designs such as automotive power supplies where overvoltage thresholds must be tightly controlled.
Is P4SMA56AHM3/H suitable for bidirectional transient protection?
No, P4SMA56AHM3/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only during reverse-biased overvoltage events. For bidirectional protection, Vishay offers the P4SMA56CA variant. Using P4SMA56AHM3/H in bidirectional applications would leave positive-going transients unprotected and may cause forward conduction failure.
Does P4SMA56AHM3/H meet automotive qualification standards?
Yes, P4SMA56AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix and Vishay documentation. This qualification validates its performance under accelerated stress tests including temperature cycling, humidity bias, and high-temperature operating life - making it suitable for under-hood and cabin applications in passenger vehicles and commercial trucks.
What is the maximum clamping voltage of P4SMA56AHM3/H at rated peak pulse current?
The maximum clamping voltage VC of P4SMA56AHM3/H is 77.0 V at 5.2 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value represents the highest voltage that will appear across the protected circuit during a standardized surge event, directly determining the overvoltage stress imposed on downstream components like microcontrollers or gate drivers.
How does the HM3 suffix affect the material composition of P4SMA56AHM3/H?
The HM3 suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2. Unlike E3 variants, HM3 uses bromine- and chlorine-free molding compounds and plating chemistries - critical for compliance in EU automotive supply chains and environmentally regulated industrial markets without sacrificing electrical or thermal performance.
P4SMA56AHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for P4SMA56AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56AHM3/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 P4SMA56AHM3/H reliable?
The price and inventory of P4SMA56AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA56AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56AHM3/H?
P4SMA56AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56AHM3/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 P4SMA56AHM3/H?
For technical support, including P4SMA56AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56AHM3/H requirements.
6.How does Aetrix verify that P4SMA56AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA56AHM3/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 P4SMA56AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA56AHM3/H?
All P4SMA56AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56AHM3/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 P4SMA56AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA56AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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