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Vishay General Semiconductor - Diodes Division P4SMA9.1CA-E3/5A
- Part No.:
- P4SMA9.1CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CA-E3/5A.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,271
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Product details
Overview
P4SMA9.1CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 9.1 V breakdown voltage (VBR min/max = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), 13.4 V maximum clamping voltage (VC) at 29.9 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA9.1CA-E3/5A datasheet, P4SMA9.1CA-E3/5A pinout, P4SMA9.1CA-E3/5A application, or P4SMA9.1CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.47), AEC-Q101 qualification eligibility (via HE3/HM3 variants), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche diode structure with glass-passivated junction. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity marking requirements and enabling use on AC-coupled or differential signal paths without orientation constraints.
It delivers fast transient response (<1 ps typical), low incremental surge resistance, and thermal stability up to TJ = 150 °C. Derated peak pulse power drops to 300 W above 91 V, but remains at full 400 W for P4SMA9.1CA-E3/5A due to its 9.1 V rating - confirmed by Fig. 1 and Table on page 2 of Document 88367.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 7.78 V - maximum continuous reverse working voltage before leakage exceeds 50 μA; sets safe operating margin below VBR |
| VC @ IPPM | 13.4 V at 29.9 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM | 400 W - peak pulse power handling per 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 29.9 A - peak pulse current capacity; defines maximum transient energy absorption before failure |
| TJ max | 150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" × 0.157" footprint and J-STD-020 MSL Level 1 rating |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and polarity-unmarked terminals for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | Enables identical clamping in both directions - no polarity-dependent installation required |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional mode | Matches anode electrically; terminals are functionally interchangeable for AC or differential line protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance in both polarities - eliminates orientation errors during assembly |
| 400 W peak pulse power | Withstands 10/1000 µs transients up to 29.9 A - meets IEC 61000-4-5 surge immunity requirements for industrial interfaces |
| Glass-passivated junction | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| AEC-Q101 qualification path | HE3/HM3 variants available - supports automotive-grade deployment in ADAS sensors and body control modules |
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 ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pairs or supply rails to clamp transients before they reach sensitive analog front-ends. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs during 12 V/24 V system surges - validated by AEC-Q101-qualified variants. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against inductive kickback from solenoid/relay switching. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to shunt >1 kV transients within nanoseconds while maintaining DC signal integrity. Use Value: Enables >100,000 switching cycles without degradation - supported by 400 W pulse rating and 150 °C junction limit. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding RS-485/RS-232 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary clamping device on data lines, coordinated with GDT or MOV for staged protection architecture. Use Value: Achieves <13.4 V clamping at 29.9 A - keeps protected transceiver within absolute maximum ratings during 10/1000 µs threats. |
Use Scenario: Adding secondary-level surge suppression on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed after primary ESD array to handle higher-energy transients. Use Value: Maintains signal integrity with minimal parasitic capacitance - verified via typical CJ < 100 pF at VWM (Fig. 4, Doc. 88367). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Higher 9.0 V nominal VBR (8.55–9.45 V), SMB package (larger footprint), 600 W PPPM | Used where board space allows larger package and higher surge margin is needed | Select when 600 W rating and 0.25" × 0.15" SMB layout is acceptable; not drop-in due to different pad dimensions |
| 1.5KE9.1CA | Through-hole DO-201 package, same 9.1 V VBR, 1500 W PPPM, higher VC = 15.4 V | Preferred for legacy through-hole designs or high-energy surge zones requiring axial-leaded robustness | Choose for prototyping or low-volume assemblies where manual soldering is acceptable and 1500 W headroom justifies larger size |
Compared with P4SMA9.1CA-E3/5A, SMBJ9.0CA offers higher surge margin in a larger SMT package, while 1.5KE9.1CA provides greater energy handling in through-hole format - neither is pin-compatible, but all three share identical bidirectional clamping function and voltage grading for cross-application validation.
Availability
P4SMA9.1CA-E3/5A is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive sensor interface hardening, and telecom line surge suppression requiring stable component supply, RoHS compliance, and AEC-Q101 upgrade path.
Supply support for P4SMA9.1CA-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, power efficiency, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume SMT applications needing standardized TVS protection - engineered for automated placement, thermal resilience, and consistent clamping across commercial and automotive temperature ranges.
FAQ
What is the breakdown voltage tolerance for P4SMA9.1CA-E3/5A?
The P4SMA9.1CA-E3/5A has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 9.1 V rating. This tight distribution ensures predictable clamping onset across production lots and supports reliable design margining in safety-critical circuits.
Is P4SMA9.1CA-E3/5A suitable for automotive applications?
P4SMA9.1CA-E3/5A itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under HE3/HM3 ordering codes (e.g., P4SMA9.1CAHE3_A). The P4SMA9.1CA-E3/5A shares identical electrical specs and package, making it a direct functional precursor for automotive qualification - design-in is common before upgrading to HE3 for production.
What does the "CA" suffix indicate in P4SMA9.1CA-E3/5A?
The "CA" suffix in P4SMA9.1CA-E3/5A denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and IPPM values regardless of voltage polarity. This eliminates the need for polarity marking and simplifies layout on AC-coupled or differential signal lines.
How is thermal performance characterized for P4SMA9.1CA-E3/5A?
P4SMA9.1CA-E3/5A has a typical junction-to-ambient thermal resistance RθJA of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. Its maximum junction temperature is 150 °C, and derating curves (Fig. 2, Doc. 88367) show usable power retention down to ~70% at 100 °C ambient - critical for under-hood or enclosed industrial deployments.
What is the clamping ratio of P4SMA9.1CA-E3/5A, and why does it matter?
The clamping ratio of P4SMA9.1CA-E3/5A is VC/VBR(min) = 13.4 V / 8.65 V ≈ 1.55 - indicating how tightly the device limits voltage during surge events. A lower ratio means less stress on downstream components; this value confirms effective protection for 5 V or 3.3 V ICs when combined with appropriate series impedance.
P4SMA9.1CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
P4SMA9.1CA-E3/5A FAQ
1.How can I place an order for P4SMA9.1CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CA-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 P4SMA9.1CA-E3/5A reliable?
The price and inventory of P4SMA9.1CA-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 P4SMA9.1CA-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CA-E3/5A?
P4SMA9.1CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CA-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 P4SMA9.1CA-E3/5A?
For technical support, including P4SMA9.1CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CA-E3/5A requirements.
6.How does Aetrix verify that P4SMA9.1CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CA-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 P4SMA9.1CA-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CA-E3/5A?
All P4SMA9.1CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CA-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 P4SMA9.1CA-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA9.1CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CA-E3/5A Tags
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