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Vishay General Semiconductor - Diodes Division P4SMA20A-M3/61
- Part No.:
- P4SMA20A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20A-M3/61.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA20A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages on power and signal lines. It features 20 V standoff voltage (VWM), 27.7 V maximum clamping voltage at 14.4 A peak pulse current, and 400 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P4SMA20A-M3/61 datasheet, P4SMA20A-M3/61 pinout, P4SMA20A-M3/61 application, or P4SMA20A-M3/61 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C, unidirectional polarity marking, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The P4SMA20A-M3/61 operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its 19.0–21.0 V breakdown range (VBR at 1 mA), clamping transients within nanoseconds. Its glass-passivated junction ensures stable leakage (<1 µA at 17.1 V) and repeatable response across temperature (-65 °C to +150 °C).
Thermal performance is defined by 120 °C/W junction-to-ambient resistance (RθJA) on standard 0.2" × 0.2" copper pads, requiring layout-aware derating above 25 °C ambient per Fig. 2. The device supports repetitive 0.01% duty cycle surges and meets AEC-Q101 qualification for automotive use (M3 suffix denotes halogen-free, RoHS-compliant commercial grade).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit operation. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1 mA - Confirmed avalanche initiation range; defines minimum overvoltage threshold for clamping activation. |
| VC (Clamping Voltage) | 27.7 V at 14.4 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; must stay below downstream IC's absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; derates to 300 W above 91 V. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Ensures minimal standby power loss and signal integrity on high-impedance lines like sensor outputs. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated assembly; cathode band identifies polarity for unidirectional mounting. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow). Cathode marked by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unmarked end) | Reference / return path | Typically tied to system ground or low-impedance return; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) without degradation over 1000+ events. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during fast transients - critical for safeguarding 3.3 V or 5 V logic interfaces. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per JESD22-A101. |
| AEC-Q101 qualified (M3 suffix) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor front-ends. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A; supports sustainability requirements for Tier 1 OEM supply chains. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach the transceiver input stage. Use Value: Prevents latch-up or permanent damage to automotive-grade transceivers rated for ≤36 V absolute max, leveraging 27.7 V clamping at 14.4 A. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, absorbing 400 W surges while maintaining <1 µA leakage at 17.1 V nominal rail. Use Value: Eliminates need for external series resistors or RC filters, preserving signal rise time and enabling direct connection to microcontroller GPIOs. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification, guarding against transformer leakage spikes and capacitor discharge transients. IC Role / Device Role / Timing Role: Unidirectional clamping device between +VOUT and GND, triggered only during reverse-polarity or overvoltage fault conditions. Use Value: Maintains UL 497B recognition for protector classification while supporting compact 5 mm × 3 mm PCB footprints. |
Use Scenario: Primary-level surge protection on Ethernet PHY interface lines (e.g., MDI pairs) in enterprise switches subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response TVS mounted adjacent to RJ45 connector, shunting energy before it propagates into magnetics or PHY IC. Use Value: Achieves sub-1 ns response time and 27.7 V clamping to protect 100BASE-TX PHYs with 3.3 V core rails and 5 V I/O tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VWM (17.1 V), identical SMA package, but lower PPPM (400 W vs. P4SMA20A-M3/61's 400 W); slightly higher VC (28.0 V vs. 27.7 V). | Approved for industrial-grade designs where AEC-Q101 is not required; lacks halogen-free certification (M3 suffix). | Select SMAJ20A for cost-sensitive non-automotive applications where minor clamping voltage increase is acceptable. |
| 1.5SMC20A | Higher package thermal resistance (RθJA = 150 °C/W vs. 120 °C/W); same VWM and VC, but larger SMC (DO-214AB) footprint (7.11 mm × 6.22 mm vs. 4.93 mm × 3.99 mm). | Used where board space permits larger footprint and higher thermal mass is needed for sustained surge duty cycles. | Choose 1.5SMC20A only if PCB layout allows SMC package and thermal design requires >120 °C/W margin. |
Compared with SMAJ20A and 1.5SMC20A, P4SMA20A-M3/61 delivers tighter clamping (27.7 V), halogen-free compliance, and superior thermal performance in the smallest SMA footprint - making it optimal for space-constrained automotive and industrial modules requiring AEC-Q101 validation.
Availability
P4SMA20A-M3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line card surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for P4SMA20A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for fast response, stable clamping, and compatibility with automated SMT assembly processes.
FAQ
What is the maximum clamping voltage of the P4SMA20A-M3/61 under a 10/1000 µs surge?
The P4SMA20A-M3/61 has a maximum clamping voltage (VC) of 27.7 V at 14.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and represents the highest voltage the protected circuit will experience during a transient event - critical for ensuring compatibility with downstream ICs rated for ≤30 V absolute maximum.
Is the P4SMA20A-M3/61 suitable for automotive applications?
Yes, the P4SMA20A-M3/61 is AEC-Q101 qualified and carries the M3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It is specified for operating junction temperatures up to +150 °C and meets MSL Level 1 handling requirements, making it appropriate for under-hood and cabin-mounted ECUs, sensor modules, and infotainment power rails.
What does the "M3" in P4SMA20A-M3/61 signify?
The "M3" suffix in P4SMA20A-M3/61 denotes halogen-free, RoHS-compliant packaging meeting IPC-1752A material declarations and JEDEC J-STD-020 MSL Level 1 reflow profile (peak 260 °C). It distinguishes this variant from E3 (RoHS-compliant but not halogen-free) and HM3 (AEC-Q101 qualified + halogen-free), confirming suitability for environmentally regulated automotive and industrial supply chains.
How does the P4SMA20A-M3/61 compare to bidirectional TVS diodes like P4SMA20CA?
The P4SMA20A-M3/61 is unidirectional and features a cathode band for polarity-sensitive placement, whereas P4SMA20CA is bidirectional with no polarity marking and symmetric clamping in both directions. Unidirectional types offer lower leakage and tighter VBR tolerance; bidirectional variants are used where AC-coupled or differential signals require symmetrical protection - the choice depends on circuit topology and grounding scheme.
What is the thermal resistance of the P4SMA20A-M3/61, and how does it affect layout?
The P4SMA20A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per datasheet Figure 6; reducing pad area increases RθJA and requires derating of peak power capability above 25 °C ambient - PCB layout must allocate sufficient copper area to maintain safe junction temperature during repetitive surges.
P4SMA20A-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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- 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)
P4SMA20A-M3/61 FAQ
1.How can I place an order for P4SMA20A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20A-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 P4SMA20A-M3/61 reliable?
The price and inventory of P4SMA20A-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 P4SMA20A-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA20A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20A-M3/61?
P4SMA20A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20A-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 P4SMA20A-M3/61?
For technical support, including P4SMA20A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20A-M3/61 requirements.
6.How does Aetrix verify that P4SMA20A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA20A-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 P4SMA20A-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA20A-M3/61?
All P4SMA20A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20A-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 P4SMA20A-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA20A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA20A-M3/61 Tags
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