My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA56AHM3_A/H
- Part No.:
- P4SMA56AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56AHM3_A/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,063
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA56AHM3_A/H 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 IT = 1.0 mA), 400 W peak pulse power (10/1000 µs), and clamping voltage of 77.0 V at 5.2 A peak pulse current - deployed for overvoltage protection of MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the P4SMA56AHM3_A/H datasheet, P4SMA56AHM3_A/H pinout, P4SMA56AHM3_A/H application, or P4SMA56AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C maximum junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
The P4SMA56AHM3_A/H operates as a unidirectional clamping device: under normal bias it blocks reverse current up to 47.8 V stand-off voltage (VWM), then rapidly avalanches above 53.2 V to limit transient energy. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Designed for repetitive transients at 0.01% duty cycle, it delivers 400 W peak pulse power only below 91 V; above that threshold, derated to 300 W per specification. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), requiring appropriate PCB copper area for sustained power dissipation.
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 avalanche onset range for reliable clamping margin |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 77.0 V at 5.2 A - clamped voltage during full 400 W transient, critical for downstream component survivability |
| PPPM | 400 W (10/1000 µs waveform) - peak transient energy handling capacity under standard surge test condition |
| IFSM | 40 A (8.3 ms half-sine) - forward surge capability for accidental polarity reversal or inductive kickback |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., power rail or signal); band-marked end for orientation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust suppression of IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation |
| Glass passivated chip junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn or delamination risk |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements |
| Low profile SMA package | Reduces board space vs. SMB/SMBF; compatible with 0.2" × 0.2" thermal pads for RθJA = 120 °C/W |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a, up to 60 V/100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping spikes within 1 ns. Use Value: Limits voltage to ≤77.0 V during 400 W surges, preventing damage to downstream DC-DC controllers and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting transients before reaching op-amp input stage. Use Value: Maintains signal integrity with <1 µA leakage at 47.8 V, avoiding offset errors in precision measurement circuits. |
| Consumer Power Adapter Input Stage | Telecom DC Power Interface |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Placed across bridge rectifier output, absorbing repetitive 10/1000 µs transients from line disturbances. Use Value: Withstands 0.01% duty cycle surges continuously; 150 °C TJ max allows operation near hot transformers. |
Use Scenario: Protecting -48 V telecom power distribution boards from hot-swap transients and field wiring faults. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48 V rail and return, clamping negative-going spikes. Use Value: 47.8 V VWM provides 10.2 V margin below nominal -48 V, ensuring no leakage during steady-state operation. |
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-E3/5A | Same VBR (53.2–58.8 V), identical SMA package, but rated for 400 W only - lacks AEC-Q101 qualification and halogen-free certification | Commercial-grade use only; not approved for automotive production | Select when AEC-Q101 is unnecessary and cost sensitivity outweighs automotive compliance |
| 1.5SMC56A | Higher package (SMC/DO-214AB), 500 W rating, same VBR range - larger footprint, higher thermal mass, no AEC-Q101 | Preferred where board space permits and higher surge margin is required beyond 400 W | Choose for industrial systems needing >400 W headroom and less stringent size constraints |
Compared with SMAJ56A-E3/5A and 1.5SMC56A, the P4SMA56AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free RoHS compliance, and optimized SMA footprint - making it the only drop-in solution for automotive Tier-1 suppliers requiring both reliability validation and SMT scalability.
Availability
P4SMA56AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power supply protection requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for P4SMA56AHM3_A/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, automotive-qualified components for harsh-environment applications.
The P4SMA series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - delivering standardized TVS performance in compact, AEC-Q101-compliant surface-mount packages.
FAQ
What is the clamping voltage of the P4SMA56AHM3_A/H under maximum surge conditions?
The P4SMA56AHM3_A/H exhibits a maximum clamping voltage (VC) of 77.0 V at 5.2 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during a 400 W transient event. The P4SMA56AHM3_A/H maintains this clamping performance across its specified operating temperature range.
Is the P4SMA56AHM3_A/H suitable for automotive applications?
Yes, the P4SMA56AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per AEC-Q101 Rev D. The P4SMA56AHM3_A/H is explicitly recommended for engine control units, body electronics, and ADAS power domains where transient immunity and long-term reliability are mandatory.
What is the maximum operating junction temperature for the P4SMA56AHM3_A/H?
The P4SMA56AHM3_A/H has a maximum junction temperature (TJ) of +150 °C, as specified in the "Maximum Ratings" table of Vishay document 88367. This rating enables deployment in under-hood automotive environments and high-temperature industrial enclosures. Derating curves in Figure 2 confirm usable power dissipation down to ambient temperatures of +125 °C when mounted on 0.2" × 0.2" copper pads.
Does the P4SMA56AHM3_A/H have a bidirectional variant?
No - the P4SMA56AHM3_A/H is strictly unidirectional, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., P4SMA56CA). The P4SMA56AHM3_A/H conducts only in forward bias and clamps reverse transients; it must be oriented with cathode toward the protected line. Using it in bidirectional configurations would result in unintended forward conduction during normal operation.
What does the "_A/H" suffix mean in P4SMA56AHM3_A/H?
The "_A/H" suffix in P4SMA56AHM3_A/H denotes revision level "A" and packaging in 7-inch plastic tape and reel (code "H"), with 1800 units per reel. The "HM3" portion confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This full ordering code distinguishes it from commercial-grade variants (e.g., P4SMA56A-E3/61) and ensures traceability to Vishay's automotive-qualified manufacturing lot.
P4SMA56AHM3_A/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):
- 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/H FAQ
1.How can I place an order for P4SMA56AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56AHM3_A/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_A/H reliable?
The price and inventory of P4SMA56AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA56AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56AHM3_A/H?
P4SMA56AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56AHM3_A/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_A/H?
For technical support, including P4SMA56AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA56AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA56AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA56AHM3_A/H?
All P4SMA56AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for P4SMA56AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA56AHM3_A/H 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 …
