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Vishay General Semiconductor - Diodes Division P4SMA300CA-E3/5A
- Part No.:
- P4SMA300CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300CA-E3/5A.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,234
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Product details
Overview
P4SMA300CA-E3/5A from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 300 V standoff voltage (VWM), 315 V minimum breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), and clamps to ≤414 V at 0.73 A peak pulse current - ideal for protecting I/O ports and sensor interfaces in industrial control systems.
For engineers reviewing the P4SMA300CA-E3/5A datasheet, P4SMA300CA-E3/5A pinout, P4SMA300CA-E3/5A application, or P4SMA300CA-E3/5A equivalent, key selection criteria include its bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin terminations, and suitability for automotive and industrial surge protection where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.31), and MSL Level 1 handling are required.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at VWM), but conducts heavily when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (≤1 µA at 300 V).
Designed for repetitive transients with 0.01% duty cycle, it delivers 400 W peak pulse power up to 91 V and 300 W above that threshold - derated linearly with junction temperature per Fig. 2. Thermal resistance (RθJA = 120 °C/W) reflects its reliance on PCB copper pad area (0.2" × 0.2") for heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 285–315 V at 1 mA test current - precise voltage threshold at which avalanche conduction begins; tight ±5% tolerance ensures predictable triggering |
| VC (Clamping Voltage) | 414 V at IPPM = 0.73 A (10/1000 µs) - maximum voltage seen by protected circuit during worst-case surge; enables robust overvoltage margin design |
| PPPM (Peak Pulse Power) | 300 W (≥91 V) - sustained surge energy handling capability; validated with 10/1000 µs waveform and 0.01% duty cycle |
| IPPM (Peak Pulse Current) | 0.73 A - maximum transient current the device safely shunts without degradation; derived directly from VC and PPPM |
| TJmax | 150 °C - maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with 2.54 mm lead pitch; compatible with automated pick-and-place and reflow soldering |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two coplanar matte tin-plated leads; bi-directional construction has no polarity marking (no cathode band). Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional avalanche terminals | Either terminal serves as anode or cathode depending on transient polarity; identical electrical behavior in both directions |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, ADAS, and infotainment modules |
| Glass passivated junction | Ensures stable VBR over time and temperature, low leakage (<1 µA), and immunity to moisture-induced parameter drift |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during assembly |
| 400 W peak pulse power (≤91 V) | Provides headroom for higher-energy surges in lower-voltage systems (e.g., 24 V CAN bus, 48 V DC power rails) |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces downstream of the TVS |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed at connector interface to clamp ESD and ISO 7637-2 pulses before reaching ADC front-end. Use Value: Maintains signal integrity by limiting transient voltage to ≤414 V while surviving repeated 300 W surges - enabling reliable operation across -40 °C to +125 °C ambient. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers interfacing with 24 V field devices subject to relay bounce and motor switching transients. IC Role / Device Role / Timing Role: Bi-directional voltage clamp on dry-contact inputs to absorb both positive and negative polarity spikes without polarity-sensitive layout. Use Value: Eliminates need for dual-diode configurations; single P4SMA300CA-E3/5A provides symmetrical protection with <1 ns response and verified AEC-Q101 stress performance. |
| Telecom Line Interface | Power Supply Input Stage |
|
Use Scenario: Secondary surge protection on RS-485/RS-422 data lines in base station remote units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Back-to-back clamping element placed after primary gas discharge tube (GDT) to handle residual let-through energy. Use Value: Clamps residual transients to safe levels (<414 V) with minimal capacitance (<5 pF at 0 V), preserving signal edge rate and bit error rate in 10 Mbps links. |
Use Scenario: Overvoltage suppression on 300 V DC intermediate bus in industrial SMPS front-ends exposed to AC line surges and capacitor discharge events. IC Role / Device Role / Timing Role: Standoff-rated shunt protector across bulk storage capacitor to prevent overvoltage failure during transient events. Use Value: Withstands 300 V continuous DC stress and clamps 10/1000 µs surges up to 300 W - extending capacitor lifetime and avoiding catastrophic MOSFET gate oxide rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300CA | Higher PPPM (600 W), same VWM/VBR, larger SMB package (DO-214AA) | Better suited for higher-energy surges; requires larger PCB footprint and different thermal pad layout | Select when system-level surge testing exceeds 300 W or when board space allows larger package for improved thermal margin |
| 1.5KE300CA | Through-hole TO-204AE (DO-41), 1500 W PPPM, same VWM/VBR range | Not SMT-compatible; used in legacy or high-reliability through-hole designs where manual assembly is acceptable | Choose only for retrofit or repair of existing through-hole boards; not recommended for new SMT designs due to placement and reflow constraints |
Compared with SMBJ300CA and 1.5KE300CA, the P4SMA300CA-E3/5A offers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and 300 W surge rating - making it the preferred choice for space-constrained automotive and industrial SMT applications requiring certified reliability and automated manufacturability.
Availability
P4SMA300CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and DC power supply input stages requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA300CA-E3/5A 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 optimization.
The P4SMA Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems - combining AEC-Q101 qualification, low-profile packaging, and precise bi-directional clamping in a cost-effective SMA format.
FAQ
What is the maximum clamping voltage of the P4SMA300CA-E3/5A under standard test conditions?
The P4SMA300CA-E3/5A clamps to a maximum of 414 V when subjected to a 10/1000 µs surge waveform at 0.73 A peak pulse current. This value is measured at TA = 25 °C with specified mounting conditions (0.2" × 0.2" copper pads), and represents the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the P4SMA300CA-E3/5A suitable for automotive applications?
Yes, the P4SMA300CA-E3/5A is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junction, MSL Level 1 moisture sensitivity, and guaranteed operation from -65 °C to +150 °C junction temperature - meeting requirements for engine bay, chassis, and ADAS subsystems where reliability under thermal and mechanical stress is mandatory.
Does the P4SMA300CA-E3/5A have polarity markings on the package?
No, the P4SMA300CA-E3/5A is a bi-directional TVS diode and carries no polarity marking such as a cathode band. Its DO-214AC (SMA) package is symmetrical, and either terminal functions identically regardless of applied voltage polarity - simplifying PCB layout and eliminating orientation errors during automated assembly.
What is the standoff voltage rating of the P4SMA300CA-E3/5A, and how does it relate to system operating voltage?
The P4SMA300CA-E3/5A has a standoff voltage (VWM) of 300 V, meaning it remains non-conductive up to this DC or RMS voltage level. For reliable operation, system nominal voltage must be ≤80% of VWM - e.g., it is appropriate for 240 V AC-derived DC buses or 300 V DC intermediate supplies where transient margins exceed 30 V above nominal.
How does the P4SMA300CA-E3/5A differ from uni-directional variants like P4SMA300A-E3/5A?
The P4SMA300CA-E3/5A is bi-directional (denoted by "CA"), providing symmetrical clamping for both positive and negative transients, whereas P4SMA300A-E3/5A is uni-directional and requires correct polarity alignment. The "CA" version eliminates polarity dependency in AC-coupled or floating signal paths - essential for RS-485, CAN FD, and sensor differential pairs where voltage polarity reverses dynamically.
P4SMA300CA-E3/5A 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 730mA
- Power - Peak Pulse:
- 300W
- 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)
P4SMA300CA-E3/5A FAQ
1.How can I place an order for P4SMA300CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300CA-E3/5A 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 P4SMA300CA-E3/5A reliable?
The price and inventory of P4SMA300CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA300CA-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA300CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300CA-E3/5A?
P4SMA300CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300CA-E3/5A 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 P4SMA300CA-E3/5A?
For technical support, including P4SMA300CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300CA-E3/5A requirements.
6.How does Aetrix verify that P4SMA300CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA300CA-E3/5A 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 P4SMA300CA-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA300CA-E3/5A?
All P4SMA300CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300CA-E3/5A, 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 P4SMA300CA-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA300CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA300CA-E3/5A Tags
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