My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA51AHM3/I
- Part No.:
- P4SMA51AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51AHM3/I.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,546
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA51AHM3/I 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 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 43.6 V standoff voltage (VWM), 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA51AHM3/I datasheet, P4SMA51AHM3/I pinout, P4SMA51AHM3/I application, or P4SMA51AHM3/I equivalent, this device is selected for robust ESD and surge protection where low-profile SMT placement, AEC-Q101 qualification, halogen-free RoHS compliance, and stable clamping under repetitive transients are required.
Technical Context
The P4SMA51AHM3/I 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 fast response time (<1 ns), enabling effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to TJ = 150 °C. The device is rated for 40 A non-repetitive forward surge (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V at 1 mA - defines precise clamping onset for overvoltage events |
| Standoff Voltage VWM | 43.6 V - maximum continuous reverse operating voltage without conduction |
| Clamping Voltage VC | 70.1 V at 5.7 A (10/1000 µs) - limits transient voltage seen by protected circuitry |
| Peak Pulse Power PPPM | 400 W - sustains high-energy transients without failure under standard test waveform |
| Peak Pulse Current IPPM | 5.7 A - maximum surge current the device safely diverts during clamping |
| Reverse Leakage ID | 1.0 µA at VWM - ensures minimal standby power loss and signal integrity |
| Operating Temperature | -65 °C to +150 °C - supports deployment in harsh automotive and industrial environments |
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; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / reference node for clamping | Connected to lower-potential side (e.g., ground or return line) in unidirectional configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., VCC, signal input); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern industrial and automotive PCB assemblies |
| 400 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow assembly without moisture sensitivity concerns |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp transients before they reach downstream regulators and logic ICs. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic circuits during ISO 7637-2 Pulse 5a (load dump) events. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers exposed to field wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-connected TVS across input terminals to shunt induced energy before it reaches optocoupler or Schmitt-trigger input stages. Use Value: Maintains signal integrity and prevents false triggering or component failure during 1 kV/2 kV surge tests per IEC 61000-4-4. |
| Telecom Base Station Sensor Interface | Consumer Appliance Motor Driver Protection |
Use Scenario: Shielding analog sensor signal lines (e.g., temperature, humidity) connected to remote radio units from ESD and RF-coupled transients. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point to suppress fast transients before reaching ADC front-end. Use Value: Limits junction capacitance impact (typical CJ < 100 pF at VWM) while providing sub-ns response to ±8 kV contact ESD per IEC 61000-4-2. |
Use Scenario: Clamping back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or driver FET drain-source to absorb inductive energy during PWM commutation. Use Value: Extends MOSFET lifetime by limiting VDS overshoot to ≤70.1 V, avoiding avalanche stress beyond safe operating area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 51 V VBR range identical | Preferred where higher surge margin is needed and board space allows larger footprint | Select SMBJ51A if system-level surge testing exceeds IEC 61000-4-5 Level 4 or layout permits SMB package |
| 1.5SMC51A | Same 51 V VBR and 400 W rating; larger SMC (DO-214AB) package; higher thermal mass | Better suited for high-temperature ambient environments (>105 °C) due to lower RθJA | Choose 1.5SMC51A when thermal derating is critical and PCB real estate is not constrained |
Compared with SMBJ51A and 1.5SMC51A, the P4SMA51AHM3/I offers the smallest footprint (SMA) and AEC-Q101/halogen-free certification out-of-box, making it optimal for space-constrained automotive and industrial modules requiring validated reliability and regulatory compliance.
Availability
P4SMA51AHM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, telecom sensor interfaces, and consumer appliance motor control requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA51AHM3/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series was developed for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping, AEC-Q101 qualification, and halogen-free compliance in compact SMT packages.
FAQ
What is the breakdown voltage tolerance for P4SMA51AHM3/I?
The P4SMA51AHM3/I has a breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1 mA test current, corresponding to a ±5% tolerance around the nominal 51 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting sensitive 48 V or 5 V rail systems where overvoltage margin must be precisely controlled. The P4SMA51AHM3/I maintains this specification per Vishay Document 88367 Rev. 09-Jan-2024.
Is P4SMA51AHM3/I suitable for automotive applications?
Yes, the P4SMA51AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from -65 °C to +150 °C junction temperature and validated for mechanical shock, temperature cycling, and HTRB per AEC-Q101. The P4SMA51AHM3/I is approved for use in BCMs, ADAS sensors, and infotainment power rails where transient immunity and long-term reliability are mandatory.
What is the maximum clamping voltage of P4SMA51AHM3/I under surge conditions?
The P4SMA51AHM3/I has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current using the standardized 10/1000 µs waveform. This value represents the highest voltage the protected circuit will experience during a worst-case transient event. Engineers use this parameter to verify that downstream components (e.g., 75 V-rated MOSFETs or 5 V LDOs with 12 V input) remain within safe operating limits when the P4SMA51AHM3/I is active.
Does P4SMA51AHM3/I have bidirectional capability?
No, the P4SMA51AHM3/I is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in the part number. It conducts only in reverse bias above VBR and blocks forward current like a standard rectifier. For bidirectional protection (e.g., AC signal lines or differential buses), a part such as P4SMA51CA would be required. The P4SMA51AHM3/I's cathode band must be correctly oriented toward the protected line during PCB layout.
What packaging and reel options are available for P4SMA51AHM3/I?
The P4SMA51AHM3/I ships in 13-inch diameter plastic tape and reel format (I-type carrier), with 7,500 units per reel. This packaging supports high-volume automated SMT placement and is compatible with industry-standard pick-and-place equipment. The "I" suffix in the part number explicitly denotes this reel size and delivery mode, distinguishing it from the 7-inch reel (H-type) variant P4SMA51AHM3/H. Both share identical electrical and mechanical specifications.
P4SMA51AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- 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)
P4SMA51AHM3/I FAQ
1.How can I place an order for P4SMA51AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51AHM3/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 P4SMA51AHM3/I reliable?
The price and inventory of P4SMA51AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA51AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51AHM3/I?
P4SMA51AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51AHM3/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 P4SMA51AHM3/I?
For technical support, including P4SMA51AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51AHM3/I requirements.
6.How does Aetrix verify that P4SMA51AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA51AHM3/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 P4SMA51AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA51AHM3/I?
All P4SMA51AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51AHM3/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 P4SMA51AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA51AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51AHM3/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 …
