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Vishay General Semiconductor - Diodes Division P4SMA30CAHE3_A/I
- Part No.:
- P4SMA30CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAHE3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA30CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), 41.4 V maximum clamping voltage (VC) at 9.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P4SMA30CAHE3_A/I datasheet, P4SMA30CAHE3_A/I pinout, P4SMA30CAHE3_A/I application, or P4SMA30CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, SMA (DO-214AC) package thermal performance, and compliance with UL 497B surge protector classification.
Technical Context
The P4SMA30CAHE3_A/I operates as a bidirectional avalanche diode, delivering symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables rapid energy diversion during transient events.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads, it sustains repetitive 400 W pulses at TA = 25 °C (derated above 25 °C per Fig. 2), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - enabling reliable operation up to TJ = +150 °C in constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 33.3 V min - Avalanche conduction begins within ±5% tolerance at 1 mA test current; ensures predictable turn-on under transients. |
| VC (Clamping Voltage) | 41.4 V max at IPPM = 9.7 A - Limits voltage seen by protected ICs during 10/1000 µs surge; critical for MOSFET gate and MCU I/O survival. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 µs surges per IEC 61000-4-5; derates to 300 W above 91 V, but fully applicable at 30 V rating. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Negligible standby current draw; avoids signal integrity degradation in high-impedance sensor lines. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without forced cooling. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HE3 denotes qualification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are functionally symmetric; device mounts across protected line and ground (or differential pair).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Conducts surge current toward ground in negative half-cycle; forms symmetrical clamping path with cathode. |
| Cathode | Transient current sink (bidirectional) | Conducts surge current toward ground in positive half-cycle; identical electrical role to anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Electrical symmetry in both directions eliminates need for polarity-aware layout; simplifies placement on differential or AC-coupled lines. |
| 400 W 10/1000 µs pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when mounted per recommended 5.0 mm × 5.0 mm pad layout. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics requiring long-term reliability. |
| UL 497B recognition (QVGQ2) | Approved for use in telecom and industrial surge protection assemblies meeting Underwriters Laboratories safety requirements. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns; no baking required prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive analog front-ends or communication ICs. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while adding zero propagation delay or capacitance impact on 1 Mbps CAN signals. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting transient energy to ground during inductive switching events on DIN-rail mounted I/O modules. Use Value: Prevents false triggering and latch-up in optocoupler input stages by limiting voltage to ≤41.4 V during 400 W surges. |
| Telecom Line Interface | Consumer USB Port Protection |
|
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs (A/B lines), coordinated with secondary GDT or polymer PTC for staged protection. Use Value: Clamps common-mode transients to <45 V within nanoseconds, preserving data integrity across multi-drop networks up to 10 Mbps. |
Use Scenario: Adding secondary surge immunity to USB 2.0 data lines (D+/D−) in smart home hubs exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector to suppress ±15 kV contact ESD per IEC 61000-4-2. Use Value: Adds <1 pF junction capacitance (per diode) - negligible impact on 480 Mbps USB 2.0 eye diagram while meeting Class 4 ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 43.5 V VC at 13.9 A. | Better suited for higher-energy surges (e.g., industrial motor drives); requires larger PCB footprint. | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when thermal margin is critical. |
| 1.5SMC33CA | Same 33 V VBR but unidirectional variant; 53.3 V VC at 11.3 A; DO-214AB package; no AEC-Q101 qualification. | Lacks automotive qualification and bidirectional symmetry; used in cost-sensitive commercial power supplies. | Choose only for non-automotive, unidirectional applications where AEC-Q101 is not required and layout allows polarity orientation. |
Compared with SMBJ30CA and 1.5SMC33CA, the P4SMA30CAHE3_A/I delivers optimal balance of AEC-Q101 compliance, compact SMA footprint, and precise 30 V standoff - making it the preferred choice for space-constrained automotive and industrial edge nodes requiring certified reliability.
Availability
P4SMA30CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply, long-lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for P4SMA30CAHE3_A/I 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 P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for fast response, low clamping, and robust MSL-1 manufacturability in surface-mount production.
FAQ
What is the clamping voltage of the P4SMA30CAHE3_A/I at its rated peak pulse current?
The P4SMA30CAHE3_A/I has a maximum clamping voltage (VC) of 41.4 V at its rated peak pulse current (IPPM) of 9.7 A with a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC and ensures downstream ICs see no more than 41.4 V during surge events - critical for protecting 3.3 V or 5 V logic interfaces connected to 24 V systems. The P4SMA30CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is the P4SMA30CAHE3_A/I suitable for automotive applications?
Yes, the P4SMA30CAHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and Vishay documentation (Document 88367, Rev. 09-Jan-2024). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD robustness required for automotive electronics. The P4SMA30CAHE3_A/I is routinely deployed in engine control units, ADAS camera modules, and body control modules where reliability under harsh thermal and electrical conditions is mandatory.
What does the "CA" suffix indicate in P4SMA30CAHE3_A/I?
The "CA" suffix in P4SMA30CAHE3_A/I designates a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical VBR, VC, and IPPM characteristics for positive and negative surges. Unlike unidirectional "A" variants, the CA version has no cathode band marking and is ideal for AC-coupled lines, differential buses (e.g., RS-485), or any application where polarity cannot be guaranteed. The P4SMA30CAHE3_A/I leverages this symmetry for simplified layout and robust protection without polarity constraints.
What is the thermal resistance of the P4SMA30CAHE3_A/I, and how does it affect PCB layout?
The P4SMA30CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation at TJ ≤ 150 °C, PCB layout must replicate this pad area - undersized traces or insufficient copper will cause thermal derating and premature failure during repetitive surges. The P4SMA30CAHE3_A/I's low RθJL supports efficient heat transfer to solder joints and internal traces, especially important in densely packed automotive modules.
How does the P4SMA30CAHE3_A/I compare to unidirectional TVS diodes in circuit implementation?
The P4SMA30CAHE3_A/I eliminates polarity dependency - unlike unidirectional TVS diodes that require correct cathode orientation relative to ground, the P4SMA30CAHE3_A/I functions identically regardless of mounting direction. This reduces assembly errors and simplifies automated placement in high-volume manufacturing. In practice, the P4SMA30CAHE3_A/I replaces two unidirectional devices in differential protection schemes, cutting BOM count and board area. Its bidirectional behavior is intrinsic to the device structure, not external circuitry.
P4SMA30CAHE3_A/I 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA30CAHE3_A/I FAQ
1.How can I place an order for P4SMA30CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAHE3_A/I 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 P4SMA30CAHE3_A/I reliable?
The price and inventory of P4SMA30CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA30CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAHE3_A/I?
P4SMA30CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAHE3_A/I 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 P4SMA30CAHE3_A/I?
For technical support, including P4SMA30CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA30CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAHE3_A/I 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 P4SMA30CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA30CAHE3_A/I?
All P4SMA30CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAHE3_A/I, 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 P4SMA30CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA30CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30CAHE3_A/I Tags
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