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Taiwan Semiconductor Corporation P4SMA30AH
- Part No.:
- P4SMA30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30AH.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,396
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Product details
Overview
P4SMA30AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 30V nominal breakdown voltage (28.5–31.5V), and clamping voltage of 41.4V at 10A peak impulse current. It provides robust ESD and surge protection for DC/DC converters, automotive power supplies, and industrial adapters.
For engineers reviewing the P4SMA30AH datasheet, P4SMA30AH pinout, P4SMA30AH application, or P4SMA30AH equivalent, key selection criteria include its 25.6V working stand-off voltage, <1μA reverse leakage at VWM, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and glass-passivated junction for stable clamping under fast transients.
Technical Context
The P4SMA30AH operates as a unidirectional avalanche diode with a single-die construction in DO-214AC package. Its 28.5–31.5V breakdown voltage is tested at 1mA, and it delivers 41.4V clamping at 10A (10/1000μs waveform), enabling reliable overvoltage protection in low-impedance power rails.
It features a fast response time of <1.0ps, temperature coefficient of VBR at 0.097%/°C, and operates across –55°C to +150°C junction temperature range. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT | 28.5–31.5V at 1mA - defines precise avalanche initiation threshold for predictable turn-on during transients |
| VWM | 25.6V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 41.4V at 10A (10/1000μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400W - peak pulse power handling capability per single non-repetitive event |
| IR @ VWM | <1μA - ultra-low leakage ensures minimal standby power loss and signal integrity |
| TJ Range | –55°C to +150°C - supports operation in under-hood automotive and industrial environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline compatible with automated placement |
Pinout & Package
DO-214AC (SMA) package with axial lead configuration: Cathode marked by band on body; anode and cathode terminals are non-polarized in layout but functionally asymmetric for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events |
| Cathode | Protected line input | Connected to line being protected (e.g., 24V rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal/humidity stress |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow-enables direct SMT assembly without preconditioning |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
Applications
| Automotive Power Supply Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs against load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power input and chassis ground to clamp surges above 25.6V. Use Value: Limits transient voltage to ≤41.4V at 10A, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding isolated 48V-to-12V DC/DC converter inputs in factory automation controllers. IC Role / Device Role / Timing Role: Standoff protector on primary-side input rail, absorbing repetitive switching noise and lightning-induced surges. Use Value: Maintains <1μA leakage at 25.6V, avoiding efficiency loss while delivering 400W single-pulse immunity. |
| LED Driver Power Stage | Telecom Adapter Surge Interface |
Use Scenario: Input-stage surge suppression for constant-current LED drivers used in street lighting systems. IC Role / Device Role / Timing Role: Primary-line TVS connected across bulk capacitor input to absorb IEC 61000-4-5 Level 3 surges. Use Value: Clamps 10/1000μs transients to 41.4V, preserving MOSFET gate drive integrity and feedback sensing accuracy. | Use Scenario: Secondary-side overvoltage protection in AC/DC wall adapters powering PoE-powered devices. IC Role / Device Role / Timing Role: Unidirectional suppressor on regulated 5V/12V output rail to prevent backfeed damage during hot-plug events. Use Value: Leverages 25.6V VWM margin to avoid false triggering while ensuring sub-42V clamping during adapter fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | 600W rating, SMB package (larger footprint), 30V VBR min/max tighter (28.5–33.3V) | Higher power handling suits higher-energy surges; less suitable for space-constrained layouts | Select when >400W pulse energy must be absorbed or board layout allows SMB footprint |
| 1.5SMC33A | 1500W rating, SMC package (3.5mm × 7.0mm), 33V VBR range (31.4–34.7V) | Designed for high-energy industrial transients; not AEC-Q101 qualified | Choose for non-automotive, high-surge environments where footprint and qualification are secondary |
Compared with SMBJ30A and 1.5SMC33A, the P4SMA30AH offers optimal balance of AEC-Q101 compliance, DO-214AC compactness, and 400W capability-making it preferred for automotive and space-sensitive industrial designs requiring certified reliability.
Availability
P4SMA30AH is available at Aetrix Electronics and suitable for automotive electronics, industrial DC/DC converters, and LED driver power stages requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA30AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs with global distribution and AEC-Q101 validation capabilities.
The P4SMA series is designed specifically for surface-mount transient suppression in automotive and industrial power systems, emphasizing reliability under harsh electrical and thermal conditions.
FAQ
What is the breakdown voltage range of the P4SMA30AH?
The P4SMA30AH has a guaranteed breakdown voltage (VBR) range of 28.5V to 31.5V at 1mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and enables accurate system-level surge margining in designs using the P4SMA30AH.
Is the P4SMA30AH suitable for automotive applications?
Yes, the P4SMA30AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements-making it suitable for front-end protection in automotive ECUs, body control modules, and infotainment power supplies where the P4SMA30AH provides certified surge resilience.
What is the clamping voltage of the P4SMA30AH at its rated peak current?
The P4SMA30AH clamps to a maximum of 41.4V at 10A peak impulse current under the standard 10/1000μs waveform. This value is critical for determining whether downstream components like LDOs or DC/DC controllers remain within their absolute maximum ratings when the P4SMA30AH activates.
Does the P4SMA30AH have polarity marking, and how is it oriented in circuit?
Yes, the P4SMA30AH uses a cathode band marking on the DO-214AC body. In circuit, the cathode connects to the line being protected (e.g., 24V rail), and the anode connects to ground-ensuring unidirectional conduction during overvoltage events. This orientation is essential for correct operation of the P4SMA30AH.
What packaging and moisture sensitivity level does the P4SMA30AH use?
The P4SMA30AH is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel, with Moisture Sensitivity Level 1 per J-STD-020-meaning no baking or floor life restrictions apply before reflow soldering, simplifying manufacturing flow for the P4SMA30AH.
P4SMA30AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 10A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA30AH FAQ
1.How can I place an order for P4SMA30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30AH 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 P4SMA30AH reliable?
The price and inventory of P4SMA30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30AH is usually 5 days.
3.What payment methods are accepted for P4SMA30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30AH?
P4SMA30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30AH 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 P4SMA30AH?
For technical support, including P4SMA30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30AH requirements.
6.How does Aetrix verify that P4SMA30AH is sourced from the original manufacturer or authorized distributors?
All P4SMA30AH 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 P4SMA30AH meets industry standards.
7.What is the process for return or replacement of P4SMA30AH?
All P4SMA30AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30AH, 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 P4SMA30AH part is unused and in its original packaging.
Return procedure for P4SMA30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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