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Taiwan Semiconductor Corporation P4SMA30H
- Part No.:
- P4SMA30H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30H.pdf
- Description:
- 400W, 30V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,756
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Product details
Overview
P4SMA30H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 27.0–33.0V breakdown voltage (VBR), and 43.5V maximum clamping voltage (VC) at 9.6A peak impulse current. It protects DC/DC converters and automotive power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA30H datasheet, P4SMA30H pinout, P4SMA30H application, or P4SMA30H equivalent, key selection criteria include its 24.3V working stand-off voltage (VWM), <1μA reverse leakage at VWM, AEC-Q101 qualification, glass-passivated junction, and 1.0ps typical response time-critical for robust ESD and surge immunity in automotive-grade power supplies.
Technical Context
The P4SMA30H operates as a unidirectional avalanche diode, clamping transient overvoltages above its VBR (27.0–33.0V) while maintaining low leakage (<1μA at 24.3V). Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for compliance with ISO 7637-2 test pulses, it delivers 400W peak pulse power (10/1000μs waveform) with a maximum clamping voltage of 43.5V at 9.6A, enabling effective protection of 24V automotive electronics without compromising system voltage margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 27.0–33.0V - defines minimum and maximum avalanche initiation threshold under standardized test conditions |
| VWM | 24.3V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM=9.6A | 43.5V - clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPPM | 400W - peak pulse power handling capability per single 10/1000μs transient event |
| IR @ VWM | <1μA - ultra-low reverse leakage preserves efficiency in always-on 24V systems |
| TJ Range | −55°C to +150°C - supports under-hood automotive deployment without derating |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to protected circuit ground or low-side return; conducts during forward surge events |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 24V rail); avalanches into conduction when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade temperature cycling, humidity, and mechanical shock per JESD22 standards |
| Glass-passivated junction | Eliminates surface contamination effects, ensuring stable VBR and low leakage over lifetime |
| ISO 7637-2 compliance | Withstands defined automotive load-dump and inductive-switching transients without degradation |
| Fast response time | <1.0ps - limits voltage overshoot before protection engages, critical for sensitive 24V microcontrollers |
Applications
| Automotive Body Control Module (BCM) | Industrial 24V DC/DC Converter |
|---|---|
Use Scenario: Protects LIN bus interface and power input stage of BCM against battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at 24V input connector. Use Value: Limits transient voltage to ≤43.5V during ISO 7637-2 Pulse 5a, preventing damage to upstream PMIC and MCU power domains. | Use Scenario: Shields primary-side MOSFET gate driver and controller IC in isolated 24V-to-5V flyback converter. IC Role / Device Role / Timing Role: Input-stage surge clamp on secondary-side 24V output rail. Use Value: Maintains VWM = 24.3V margin above nominal rail, enabling reliable operation with <1μA leakage at full temperature range. |
| Commercial Lighting Driver | Onboard Charger (OBC) Auxiliary Supply |
Use Scenario: Safeguards constant-current LED driver ICs from switching noise and lightning-induced surges on 24V input. IC Role / Device Role / Timing Role: Primary overvoltage protection element on AC/DC output bus. Use Value: 400W peak power rating absorbs multiple 10/1000μs transients without thermal runaway or parameter shift. | Use Scenario: Guards 12V auxiliary supply rail in EV onboard charger against coupling from high-voltage DC-link switching. IC Role / Device Role / Timing Role: Secondary-side transient suppressor on isolated 12V control rail. Use Value: AEC-Q101 qualification ensures reliability in high-vibration, thermally aggressive OBC environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | DO-214AA (SMB) package; 600W rating; bidirectional variant standard; VC = 48.4V @ 8.3A | Higher power but larger footprint; bidirectional default requires polarity verification in unidirectional circuits | Select when higher surge margin is needed and board space allows SMB footprint |
| 1.5SMC33A | DO-214AB (SMC) package; 1500W rating; VC = 53.3V @ 28.3A; higher VWM = 28.2V | Larger package increases layout area; higher VWM reduces margin for 24V systems near upper rail tolerance | Choose only if 1500W surge immunity is mandatory and thermal management supports SMC size |
Compared with SMBJ30A and 1.5SMC33A, the P4SMA30H offers optimal balance of compact DO-214AC footprint, precise 24.3V VWM for 24V systems, AEC-Q101 qualification, and verified ISO 7637-2 compliance-making it the preferred choice for space-constrained automotive and industrial 24V protection where leakage and response time are critical.
Availability
P4SMA30H is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24V DC/DC converters, and commercial LED lighting drivers requiring stable component supply across extended temperature and surge stress conditions.
Supply support for P4SMA30H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices.
The P4SMA series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for automotive and industrial power rail protection with emphasis on low leakage, fast response, and robust surge endurance.
FAQ
What is the maximum clamping voltage of the P4SMA30H under standard surge conditions?
The P4SMA30H has a maximum clamping voltage (VC) of 43.5V when subjected to a 10/1000μs waveform with a peak impulse current (IPPM) of 9.6A. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during transient events. The P4SMA30H maintains this clamping performance across its full operating temperature range (−55°C to +150°C).
Is the P4SMA30H suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the P4SMA30H is explicitly AEC-Q101 qualified per the manufacturer's datasheet (Version A2102). It undergoes rigorous stress testing-including temperature cycling, humidity bias, and mechanical shock-to ensure reliability in automotive environments such as body control modules and onboard chargers. The P4SMA30H also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements, confirming its suitability for vehicle-level EMC compliance.
What is the working stand-off voltage (VWM) of the P4SMA30H, and why does it matter?
The P4SMA30H has a working stand-off voltage (VWM) of 24.3V, which is the maximum DC or continuous reverse voltage the device can withstand without entering avalanche conduction. This value provides a safe margin below the 27.0V minimum breakdown voltage (VBR) and ensures minimal leakage (<1μA) in 24V systems-even at elevated temperatures. For the P4SMA30H, this enables reliable operation in automotive and industrial 24V rails without false triggering.
Does the P4SMA30H have polarity markings, and how is it oriented on the PCB?
Yes, the P4SMA30H uses a DO-214AC (SMA) package with a visible cathode band marking on the body. The cathode terminal must be connected to the protected line (e.g., 24V rail), and the anode to ground. This unidirectional orientation ensures proper clamping during positive transients. The P4SMA30H's marking code "BQJ" is laser-etched adjacent to the cathode band, and its matte tin-plated leads comply with J-STD-002 solderability standards.
How does the P4SMA30H compare to the P4SMA30AH variant?
The P4SMA30H and P4SMA30AH differ in breakdown voltage tolerance: P4SMA30H specifies VBR = 27.0–33.0V (±10%), while P4SMA30AH tightens this to 28.5–31.5V (±5%). Both share identical VWM (24.3V), VC (43.5V), and packaging. The P4SMA30H is selected when broader VBR tolerance is acceptable; the P4SMA30AH suits designs requiring tighter clamping consistency. Neither variant changes the P4SMA30H's core electrical behavior or footprint.
P4SMA30H 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):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 9.6A
- 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)
P4SMA30H FAQ
1.How can I place an order for P4SMA30H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30H 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 P4SMA30H reliable?
The price and inventory of P4SMA30H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30H is usually 5 days.
3.What payment methods are accepted for P4SMA30H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30H?
P4SMA30H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30H 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 P4SMA30H?
For technical support, including P4SMA30H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30H requirements.
6.How does Aetrix verify that P4SMA30H is sourced from the original manufacturer or authorized distributors?
All P4SMA30H 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 P4SMA30H meets industry standards.
7.What is the process for return or replacement of P4SMA30H?
All P4SMA30H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30H, 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 P4SMA30H part is unused and in its original packaging.
Return procedure for P4SMA30H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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