My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA51A-M3/61
- Part No.:
- P4SMA51A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51A-M3/61.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,290
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA51A-M3/61 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 43.6 V stand-off voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 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 telecom systems.
For engineers reviewing the P4SMA51A-M3/61 datasheet, P4SMA51A-M3/61 pinout, P4SMA51A-M3/61 application, or P4SMA51A-M3/61 equivalent, this device delivers verified transient suppression performance in compact SMA packaging with halogen-free, RoHS-compliant construction and AEC-Q101 qualification available in related variants.
Technical Context
The P4SMA51A-M3/61 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 incremental surge resistance, enabling precise clamping during fast transients (response time <1 ns).
Thermal design relies on RθJA = 120 °C/W and RθJL = 30 °C/W, with derating above 25 °C per Fig. 2. It supports repetitive 0.01% duty cycle pulses at 400 W below 91 V and 300 W above - validated under JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Avalanche conduction onset range; ensures reliable triggering across temperature and unit variation |
| VC (Clamping Voltage) | 70.1 V at 5.7 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case transient; limits stress on downstream components |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability under standard 10/1000 µs waveform; enables robust ESD/lightning surge protection |
| IPPM (Peak Pulse Current) | 5.7 A - Maximum non-repetitive surge current handled without degradation; determines minimum series impedance for system-level protection |
| TJ max. | 150 °C - Maximum junction temperature; sets thermal design boundary for PCB copper pad sizing and ambient operating limits |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.0 mm × 5.0 mm copper pads per terminal; compatible with automated placement and reflow |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002/JESD 22-B102, cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; forms forward-biased path during overvoltage events on cathode-side inputs |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential line (e.g., VCC, signal high); initiates avalanche conduction when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V–48 V rails without external series impedance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving clamping precision for sensitive logic interfaces |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive supply chains without compromising thermal or electrical performance |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (260 °C peak), eliminating bake requirements and reducing assembly cost |
| AEC-Q101 qualified variants available | Supports automotive-grade reliability validation (e.g., P4SMA51AHM3_A/H), enabling reuse in ADAS and body control modules |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and ground, clamping negative transients to prevent latch-up or oxide damage. Use Value: Limits transient voltage to ≤70.1 V during 5.7 A surges, preserving MOSFET gate oxide integrity and ensuring uninterrupted PWM operation. |
Use Scenario: Input-stage surge suppression on 48 V DC-DC converter front-ends exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device across input bus, absorbing up to 400 W of transient energy before upstream fusing activates. Use Value: Maintains system uptime by preventing shutdown or component failure during 4 kV combination wave tests without requiring oversized bulk capacitance. |
| Automotive Sensor Interfaces | Consumer IoT Signal Lines |
Use Scenario: ESD protection on LIN bus or analog sensor outputs (e.g., temperature, pressure) in engine control units. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to sensor ground, shunting ±8 kV HBM ESD events away from ADC input stages. Use Value: Guarantees signal integrity with <1 ns response and <1 µA leakage at 43.6 V, avoiding measurement drift or false triggers. |
Use Scenario: USB data line (D+/D−) and button interface protection in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at VWM) placed inline to suppress ±15 kV air discharge without signal distortion. Use Value: Preserves USB 2.0 signal rise/fall times while limiting transient voltage to safe levels for 3.3 V microcontroller GPIOs. |
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 (Bourns) | Same VWM (43.6 V), identical SMA package, but 600 W PPPM and 10.1 A IPPM; higher thermal resistance (RθJA = 140 °C/W) | Better suited for single-event high-energy surges; less optimal for repetitive transients due to slower thermal recovery | Select SMBJ51A when peak surge energy exceeds 400 W and board layout allows larger copper area for thermal management |
| 1.5SMC51A (ON Semiconductor) | Same VBR range and PPPM, but SMC (DO-214AB) package - 20% larger footprint and 0.5 mm taller; RθJA = 110 °C/W | Higher power handling margin in space-tolerant designs; incompatible with SMA-reflow profiles due to different thermal mass | Choose 1.5SMC51A only if existing PCB has SMC footprints or requires enhanced long-duration surge endurance |
Compared with SMBJ51A and 1.5SMC51A, the P4SMA51A-M3/61 offers optimal balance of compact SMA footprint, halogen-free compliance, and verified 400 W transient absorption - making it preferred for high-density industrial and telecom PCBs where reflow compatibility and environmental specs are critical.
Availability
P4SMA51A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive sensor interfaces, and consumer IoT signal lines requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA51A-M3/61 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 P4SMA51A-M3/61 belongs to Vishay's TRANSZORB® TVS family, engineered for high-speed transient suppression in space-constrained, high-reliability applications across industrial, automotive, and communications infrastructure.
FAQ
What is the maximum clamping voltage of the P4SMA51A-M3/61 under standard test conditions?
The P4SMA51A-M3/61 has a maximum clamping voltage (VC) of 70.1 V when subjected to a 10/1000 µs waveform at 5.7 A peak pulse current. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during a defined transient event - critical for ensuring downstream ICs remain within absolute maximum ratings. The P4SMA51A-M3/61 maintains this clamping performance across its specified operating temperature range.
Is the P4SMA51A-M3/61 suitable for automotive applications?
The P4SMA51A-M3/61 itself is a commercial-grade part (M3 suffix), but Vishay offers AEC-Q101 qualified variants such as P4SMA51AHM3_A/H for automotive use. These share identical electrical characteristics and SMA packaging but undergo additional stress testing per AEC-Q101. For non-safety-critical automotive subsystems like infotainment or body electronics, the P4SMA51A-M3/61 may be used pending customer qualification - however, the P4SMA51A-M3/61 is not certified to AEC-Q101.
What does the "M3" suffix indicate in P4SMA51A-M3/61?
The "M3" suffix in P4SMA51A-M3/61 denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD 201 Class 2 whisker resistance requirements. It also confirms compliance with JEDEC J-STD-020 MSL Level 1, allowing unlimited floor life and standard 260 °C reflow profiles. This distinguishes it from the "E3" (RoHS-compliant but not halogen-free) and "HM3" (halogen-free + AEC-Q101 qualified) variants.
How does the P4SMA51A-M3/61 compare to bidirectional TVS diodes like P4SMA51CA?
The P4SMA51A-M3/61 is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-ground), offering tighter VBR tolerance and lower leakage. In contrast, P4SMA51CA is bidirectional, symmetrically rated for AC or floating signal lines, with identical VWM/VBR values in both directions. The P4SMA51A-M3/61 cannot replace P4SMA51CA in AC-coupled applications without redesigning biasing and grounding - their circuit roles and failure modes differ fundamentally.
What PCB layout considerations are required for optimal thermal performance of the P4SMA51A-M3/61?
For optimal thermal performance, the P4SMA51A-M3/61 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2 derating curves. Smaller pads increase RθJA beyond the rated 120 °C/W, risking thermal runaway during repetitive surges. Thermal vias under pads and internal ground planes further reduce junction temperature - essential when operating near the 150 °C TJ limit in enclosed enclosures.
P4SMA51A-M3/61 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51A-M3/61 FAQ
1.How can I place an order for P4SMA51A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51A-M3/61 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 P4SMA51A-M3/61 reliable?
The price and inventory of P4SMA51A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51A-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA51A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51A-M3/61?
P4SMA51A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51A-M3/61 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 P4SMA51A-M3/61?
For technical support, including P4SMA51A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51A-M3/61 requirements.
6.How does Aetrix verify that P4SMA51A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA51A-M3/61 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 P4SMA51A-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA51A-M3/61?
All P4SMA51A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51A-M3/61, 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 P4SMA51A-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA51A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51A-M3/61 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 …
