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Vishay General Semiconductor - Diodes Division P4SMA20A-E3/61
- Part No.:
- P4SMA20A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20A-E3/61.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
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Product details
Overview
P4SMA20A-E3/61 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 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR) at 1 mA, 27.7 V clamping voltage (VC) at 14.4 A peak pulse current (IPPM), and 400 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA20A-E3/61 datasheet, P4SMA20A-E3/61 pinout, P4SMA20A-E3/61 application, or P4SMA20A-E3/61 equivalent, this page delivers verified electrical parameters, thermal behavior, polarity marking, RoHS-compliant packaging, and AEC-Q101 qualification status - all critical for ESD/surge protection design-in and BOM validation.
Technical Context
The P4SMA20A-E3/61 operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast transient response (<1 ns) and low incremental surge resistance. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Thermally, it exhibits RθJA = 120 °C/W (junction-to-ambient) and RθJL = 30 °C/W (junction-to-lead), with a maximum operating junction temperature of +150 °C. Derating above TA = 25 °C follows Fig. 2 in the datasheet, supporting use in compact PCB layouts with minimal copper pad area (0.2" × 0.2").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 14.4 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per single 10/1000 µs transient; rated at TA = 25 °C. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Minimal standby current leakage; preserves low-power system integrity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 3.99 mm width, and 2.29 mm height; compatible with standard reflow profiles (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge or bias conditions. |
| Cathode | Avalanche clamping terminal (unidirectional) | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating in typical PCB layouts. |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, with <0.1 %/°C drift and immunity to humidity-induced parameter shift. |
| AEC-Q101 qualified (E3 suffix variant) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Low profile SMA package | 0.208" × 0.157" footprint supports high-density routing and automated placement on consumer and industrial PCBs. |
| RoHS-compliant, halogen-free option available | E3/61 version meets EU RoHS Directive 2011/65/EU and JEDEC JS709C material requirements. |
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 transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping transients within 1 ns to prevent latch-up or gate oxide damage in downstream ICs. Use Value: With VC = 27.7 V and VWM = 17.1 V, it safeguards 24 V automotive systems while maintaining >7 V noise margin below supply rails. |
Use Scenario: Shielding digital input/output channels of programmable logic controllers from field-side surge events caused by motor contactor switching or lightning-induced coupling. IC Role / Device Role / Timing Role: Standoff-connected TVS on each I/O line, absorbing up to 400 W pulses without degradation across 10⁵+ surge cycles. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards in harsh factory environments. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controller ICs against mains-borne surges and capacitor discharge transients. IC Role / Device Role / Timing Role: Placed across bridge rectifier output or DC bus, conducting only during overvoltage events to limit stress on bulk capacitors and PWM controllers. Use Value: 150 °C TJ max and 120 °C/W RθJA allow reliable operation in enclosed, thermally constrained enclosures without heatsinking. |
Use Scenario: Protecting Ethernet PHYs, DSL line drivers, and RS-485 transceivers from induced surges on twisted-pair communication lines. IC Role / Device Role / Timing Role: Bidirectional-capable family member (P4SMA20CA-E3/61 alternative) used in differential pair protection; unidirectional variant applied for single-ended line clamping. Use Value: Low 1.0 µA ID at VWM minimizes standby power loss in always-on telecom equipment with strict energy budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/52 | Higher power rating (600 W), larger SMB (DO-214AA) package, same VWM/VBR/VC specs. | Better suited for higher-energy transients; requires larger PCB footprint and different pad layout. | Select when surge energy exceeds 400 W or when board space allows larger package for improved thermal margin. |
| 1.5SMC20A | Same electrical specs but in SMC (DO-214AB) package; 1.5 kW peak power rating, higher thermal mass. | Used where long-duration transients or repeated surge duty cycles demand greater thermal resilience. | Choose for industrial motor drives or renewable energy inverters with frequent switching-induced transients. |
Compared with P4SMA20A-E3/61, SMBJ20A-E3/52 offers +50 % peak power in a slightly larger footprint, while 1.5SMC20A provides triple the power handling in a significantly larger package - both retain identical clamping behavior but differ in thermal response, PCB area, and surge repetition capability.
Availability
P4SMA20A-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer power adapters, and telecom line interfaces requiring stable component supply, RoHS compliance, and AEC-Q101 qualification.
Supply support for P4SMA20A-E3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series was developed for cost-effective, high-volume transient suppression in space-constrained surface-mount designs - targeting automotive, industrial, and consumer applications where fast response, low leakage, and MSL Level 1 reflow compatibility are essential.
FAQ
What is the clamping voltage of P4SMA20A-E3/61 at its rated peak pulse current?
The P4SMA20A-E3/61 has a maximum clamping voltage (VC) of 27.7 V at 14.4 A peak pulse current (IPPM) under a 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 circuits during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is P4SMA20A-E3/61 qualified for automotive applications?
Yes, P4SMA20A-E3/61 is AEC-Q101 qualified per Vishay's documentation (Revision 09-Jan-2024, Document Number 88367). The "E3" suffix denotes RoHS-compliant commercial-grade qualification, and Vishay explicitly states AEC-Q101 availability for the P4SMA20A variant. This makes P4SMA20A-E3/61 suitable for non-safety-critical automotive subsystems including body control modules and sensor interfaces.
What does the "-E3/61" suffix mean in P4SMA20A-E3/61?
The "-E3" suffix indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/61" specifies packaging in 7-inch diameter plastic tape and reel, with a standard quantity of 1800 pieces per reel. This ordering code aligns with Vishay's preferred part numbering in Table 3 of datasheet 88367 and ensures correct logistics and assembly-line compatibility.
How does the thermal resistance of P4SMA20A-E3/61 affect its surge handling capability?
P4SMA20A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W. At elevated ambient temperatures, its peak pulse power must be derated per Figure 2 in the datasheet - e.g., at TA = 85 °C, PPPM drops to ~280 W. This directly impacts sustained surge repetition rate and requires attention to PCB copper area and airflow in thermally dense designs using P4SMA20A-E3/61.
Can P4SMA20A-E3/61 be used in bidirectional protection circuits?
No - P4SMA20A-E3/61 is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, the equivalent part is P4SMA20CA-E3/61 ("CA" suffix), which provides symmetrical clamping in both polarities. Using P4SMA20A-E3/61 in AC or differential signal paths risks forward conduction and failure during negative transients.
P4SMA20A-E3/61 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-E3/61 FAQ
1.How can I place an order for P4SMA20A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20A-E3/61 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-E3/61 reliable?
The price and inventory of P4SMA20A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA20A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA20A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20A-E3/61?
P4SMA20A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20A-E3/61 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-E3/61?
For technical support, including P4SMA20A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20A-E3/61 requirements.
6.How does Aetrix verify that P4SMA20A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA20A-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA20A-E3/61?
All P4SMA20A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20A-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA20A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA20A-E3/61 Tags
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