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Vishay General Semiconductor - Diodes Division P4SMA30CAHE3_A/H
- Part No.:
- P4SMA30CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30CAHE3_A/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,004
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Product details
Overview
P4SMA30CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on 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 at 9.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the P4SMA30CAHE3_A/H datasheet, P4SMA30CAHE3_A/H pinout, P4SMA30CAHE3_A/H application, or P4SMA30CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.24), thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast transient suppression with minimal voltage overshoot.
The device is rated for 400 W peak pulse power (10/1000 µs) up to 91 V, derating to 300 W above that threshold, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance. It is AEC-Q101 qualified (automotive grade) and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 33.3 V min - Voltage at which device enters avalanche conduction under 1.0 mA test current; ensures predictable turn-on threshold. |
| VC (Clamping Voltage) | 41.4 V max at 9.7 A - Peak voltage seen by protected circuit during 10/1000 µs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity for standardized 10/1000 µs surge; validates robustness against IEC 61000-4-5 induced transients. |
| ID (Reverse Leakage) | ≤1.0 µA at 30 V - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; informs PCB pad design (0.2" × 0.2" copper per terminal recommended). |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. No polarity marking for bidirectional configuration - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | Accepts surge current during positive or negative voltage excursion; connects to line being protected. |
| Cathode | Transient current exit point (either direction) | Completes surge path to ground or return rail; bidirectional symmetry eliminates cathode/anode assignment. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces under temperature cycling, humidity, and mechanical shock stress. |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in 12 V/24 V vehicle electrical systems and industrial motor drive switching noise. |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes overvoltage stress on protected ICs - critical for safeguarding 3.3 V or 5 V logic inputs without additional series impedance. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling requirements. |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and leakage performance across temperature and lifetime stress conditions. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt surge energy before it reaches sensitive front-end amplifiers or microcontrollers. Use Value: Prevents latch-up or permanent damage to AEC-Q100 qualified ICs by limiting transient voltage to ≤41.4 V during 10/1000 µs events up to 400 W. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers exposed to relay coil flyback, ESD, and field wiring surges in factory automation. IC Role / Device Role / Timing Role: Fast-response voltage clamp on 24 V DC I/O lines, mounted adjacent to terminal blocks to minimize inductance in the surge path. Use Value: Enables reliable operation in harsh electromagnetic environments by maintaining signal integrity under repetitive 1 kV/500 A surge tests per IEC 61000-4-5 Level 3. |
| Telecom Line Interface Protection | Consumer Device USB/UART Protection |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary transient suppressor on differential data lines, paired with common-mode chokes to handle both differential and common-mode transients. Use Value: Maintains data link uptime by clamping transients within 1 ns response time while adding <1 pF junction capacitance at 0 V bias - preserving signal rise/fall times. |
Use Scenario: Adding secondary-level ESD and surge protection to USB 2.0 D+/D− and UART TX/RX lines in smart home hubs and portable medical devices. IC Role / Device Role / Timing Role: Secondary TVS after primary ESD array, absorbing higher-energy transients that bypass on-chip protection. Use Value: Extends product lifecycle by preventing cumulative degradation of internal ESD structures through low-leakage (<1 µA) operation at 3.3 V/5 V supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Higher 600 W PPPM rating, larger SMB (DO-214AA) package, 33 V VWM, 36.7 V VBR min, 53.3 V VC at 11.3 A | Better suited for higher-energy surges; requires larger PCB footprint and higher thermal mass for full power dissipation | Select when system-level surge testing exceeds 400 W or when layout allows SMB package and enhanced clamping margin is needed |
| 1.5KE33CA | Through-hole DO-201 package, 1500 W PPPM, 33 V VWM, 36.7 V VBR min, 53.3 V VC at 28.3 A | Designed for board-edge or chassis-level protection; not suitable for dense SMT layouts or automated assembly | Choose for cost-sensitive industrial power supplies where manual assembly is acceptable and higher surge immunity is mandatory |
Compared with SMBJ33CA and 1.5KE33CA, P4SMA30CAHE3_A/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability - making it preferred for space-constrained automotive and embedded designs requiring automotive-grade reliability without through-hole or oversized SMT compromises.
Availability
P4SMA30CAHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC I/O modules, and telecom line interface circuits requiring stable component supply, AEC-Q101 compliance, and repeatable SMT manufacturability.
Supply support for P4SMA30CAHE3_A/H 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 targets cost-effective, high-volume transient protection for automotive, industrial, and consumer electronics - delivering standardized TVS performance in compact surface-mount packages with automotive qualification options.
FAQ
What is the clamping voltage of P4SMA30CAHE3_A/H at its rated peak pulse current?
The P4SMA30CAHE3_A/H has a maximum clamping voltage (VC) of 41.4 V at 9.7 A peak pulse current (IPPM), measured using the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Electrical Characteristics table of Vishay's Document Number 88367. The low clamping ratio (VC/VBR ≈ 1.24) ensures effective protection for 3.3 V and 5 V logic interfaces without excessive overvoltage stress.
Is P4SMA30CAHE3_A/H suitable for automotive applications?
Yes, P4SMA30CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix and revision code "_A/H". It meets rigorous stress tests including temperature cycling, humidity, mechanical shock, and high-temperature operating life - validated for under-hood and cabin-mounted ECUs, sensor modules, and infotainment interfaces. Its MSL Level 1 rating also supports standard lead-free reflow assembly in automotive manufacturing lines.
How does the bidirectional configuration of P4SMA30CAHE3_A/H affect its circuit implementation?
The bidirectional configuration of P4SMA30CAHE3_A/H means it conducts symmetrically in both polarities, eliminating the need for polarity-aware placement on PCBs. It is installed across differential lines (e.g., RS-485 A/B, CAN H/L) or between signal and ground without cathode/anode orientation constraints. This simplifies layout, reduces BOM complexity versus unidirectional alternatives, and ensures consistent clamping behavior for AC-coupled or floating signals - a key advantage in telecom and automotive serial bus protection.
What is the thermal resistance of P4SMA30CAHE3_A/H, and how does it impact PCB layout?
P4SMA30CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking and dictates minimum copper area required to maintain junction temperature below +150 °C during repetitive surge events. Reducing pad size increases thermal resistance and risks thermal runaway; designers must adhere to Vishay's mounting pad layout in Document 88367 to guarantee rated 400 W pulse power performance.
Does P4SMA30CAHE3_A/H have a specified junction capacitance, and is it suitable for high-speed data lines?
While the datasheet does not list a guaranteed maximum junction capacitance for P4SMA30CAHE3_A/H, typical values for the P4SMA30CA variant are ≤100 pF at 0 V bias (per Fig. 4 in Document 88367). This makes it suitable for moderate-speed interfaces such as RS-232, RS-485, and 10/100 Mbps Ethernet PHYs, but not for USB 2.0 HS (>480 Mbps) or PCIe where sub-1 pF capacitance is required. For high-speed applications, designers should verify signal integrity with IBIS models or bench measurements, as capacitance varies with applied voltage and temperature.
P4SMA30CAHE3_A/H 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/H FAQ
1.How can I place an order for P4SMA30CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30CAHE3_A/H 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/H reliable?
The price and inventory of P4SMA30CAHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for P4SMA30CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30CAHE3_A/H?
P4SMA30CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30CAHE3_A/H 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/H?
For technical support, including P4SMA30CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30CAHE3_A/H requirements.
6.How does Aetrix verify that P4SMA30CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA30CAHE3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of P4SMA30CAHE3_A/H?
All P4SMA30CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30CAHE3_A/H, 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/H part is unused and in its original packaging.
Return procedure for P4SMA30CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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