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Taiwan Semiconductor Corporation P4SMA33AH
- Part No.:
- P4SMA33AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33AH.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,000
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Product details
Overview
P4SMA33AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 31.4–34.7 V breakdown voltage (VBR), 28.2 V working stand-off voltage (VWM), 45.7 V clamping voltage (VC) at 9.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), and <1 µA reverse leakage at VWM, making it suitable for automotive-grade DC/DC converters and industrial power adapters.
For engineers reviewing the P4SMA33AH datasheet, P4SMA33AH pinout, P4SMA33AH application, or P4SMA33AH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, fast sub-1 ps response time, and DO-214AC (SMA) package compatibility - critical for high-reliability 12–24 V system protection design.
Technical Context
The P4SMA33AH operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transient surges on positive-polarity DC lines. Its electrical behavior follows IEEE C62.35 standards, with VBR tested at 1.0 mA and clamping defined per 10/1000 µs waveform per REA specification.
It supports operation across –55 °C to +150 °C junction temperature range, exhibits 0.098 %/°C VBR temperature coefficient, and maintains <1 µA IR at VWM, ensuring low standby power loss in always-on systems such as automotive body control modules and industrial PLC I/O protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 31.4–34.7 V - defines minimum and maximum avalanche initiation threshold under standardized test conditions |
| VWM | 28.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM = 9.0 A | 45.7 V - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 400 W - peak pulse power handling capability, derated above 25 °C ambient per Fig.2 |
| IR @ VWM | <1 µA - ensures negligible standby current draw in battery-powered or energy-sensitive applications |
| Junction Temp Range | –55 to +150 °C - enables deployment in under-hood automotive and industrial environments |
| Package | DO-214AC (SMA) - industry-standard SMD outline with matte tin-plated leads, J-STD-002 solderable |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; polarity-sensitive unidirectional configuration; terminals are anode and cathode; weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-biased operation | Connected to ground or lower-potential rail; forms current path during transient clamp |
| Cathode | Protected line connection point | Connected to the line being protected (e.g., 24 V supply rail); clamps to anode when overvoltage occurs |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | Typically <1.0 ps - enables suppression of nanosecond-scale ESD and EFT events before IC damage |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - no floor life limitation; safe for standard SMT reflow without baking |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from load dump and jump-start transients in vehicle door modules and lighting controllers. IC Role / Device Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping surges to ≤45.7 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic interfaces by limiting rail excursion below 46 V during ISO 7637-2 Pulse 1 (–100 V, 50 ms). | Use Scenario: Shields primary-side controller ICs and MOSFET gates from switching-induced spikes in 48 V-to-12 V isolated DC/DC converters. IC Role / Device Role: Mounted across input capacitor terminals to absorb repetitive 400 W pulses without degradation. Use Value: Enables >100,000 surge cycles per MIL-STD-883H Method 3015.7 due to stable glass-passivated junction and 150 °C TJMAX. |
| LED Driver Power Supply | Smart Meter Power Input Stage |
Use Scenario: Safeguards constant-current LED driver ICs against induced surges from nearby relay switching or lightning-induced coupling in outdoor signage. IC Role / Device Role: Connected anode-to-ground, cathode-to-24 V input rail to suppress positive transients only. Use Value: Maintains <1 µA leakage at 28.2 V, avoiding false triggering or efficiency loss in low-power standby modes. | Use Scenario: Provides first-line protection on AC/DC adapter output feeding metrology SoCs in utility smart meters exposed to grid disturbances. IC Role / Device Role: Placed after bulk capacitor to clamp residual surges escaping upstream MOV-based protection. Use Value: Delivers 400 W peak power rating with 0.098 %/°C VBR stability, ensuring consistent clamping across –25 to +70 °C field operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Same VWM (28.2 V), higher PPPM (600 W), DO-214AA (SMB) package - 2.6 mm wider body | Requires PCB pad revision; better suited for higher-energy surges where space allows | Select SMBJ33A if system-level testing requires >400 W margin or legacy SMB footprint is fixed |
| 1.5SMC33A | Same VWM/VC, 1500 W PPPM, DO-214AB (SMC) package - larger, through-hole compatible variant | Not SMT-compatible; used in high-surge industrial power supplies with manual assembly | Choose 1.5SMC33A only for prototyping or low-volume builds where DO-214AC footprint is unavailable |
Compared with P4SMA33AH, SMBJ33A offers higher surge capacity in a slightly larger but still SMT-compatible package, while 1.5SMC33A provides significantly higher power handling at the cost of SMT compatibility and board area - making P4SMA33AH optimal for space-constrained, AEC-Q101-compliant automotive and industrial designs.
Availability
P4SMA33AH is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converter inputs, and smart meter power input stages requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for P4SMA33AH 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 for automotive, industrial, and consumer markets.
The P4SMA series belongs to TSC's AEC-Q101-qualified surface-mount TVS portfolio, engineered specifically for reliable transient suppression in 12 V/24 V automotive and harsh-environment industrial power systems.
FAQ
What is the polarity configuration of the P4SMA33AH?
The P4SMA33AH is a unidirectional TVS diode, configured with cathode marked by a band on the DO-214AC (SMA) package. It conducts only during positive transients on the cathode side relative to anode (ground), making it suitable for protecting positive DC rails. This differs from bidirectional variants like P4SMA33CAH, which suppress both polarities.
Does the P4SMA33AH meet automotive qualification standards?
Yes, the P4SMA33AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. Its glass-passivated junction, MSL Level 1 rating, and –55 °C to +150 °C operating range confirm suitability for under-hood and body electronics applications where P4SMA33AH is deployed.
What is the clamping voltage of the P4SMA33AH at its rated peak pulse current?
The P4SMA33AH has a maximum clamping voltage (VC) of 45.7 V at 9.0 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per REA-defined pulse shape (Fig.5) and ensures protected circuits remain below critical voltage thresholds during surge events.
Can the P4SMA33AH be used in bidirectional protection applications?
No - the P4SMA33AH is unidirectional only. For bidirectional transient suppression, Taiwan Semiconductor specifies the P4SMA33CAH variant (with "CAH" suffix), which provides symmetrical clamping in both directions. Using P4SMA33AH in bidirectional scenarios risks failure during negative transients.
What is the maximum junction temperature rating for the P4SMA33AH?
The P4SMA33AH has a maximum junction temperature (TJMAX) of +150 °C, with a specified operating junction temperature range of –55 °C to +150 °C. This rating supports use in high-ambient environments such as engine compartments and enclosed industrial enclosures where P4SMA33AH must sustain repeated surge events without thermal runaway.
P4SMA33AH 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 9A
- 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)
P4SMA33AH FAQ
1.How can I place an order for P4SMA33AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33AH 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 P4SMA33AH reliable?
The price and inventory of P4SMA33AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33AH is usually 5 days.
3.What payment methods are accepted for P4SMA33AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33AH?
P4SMA33AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33AH 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 P4SMA33AH?
For technical support, including P4SMA33AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33AH requirements.
6.How does Aetrix verify that P4SMA33AH is sourced from the original manufacturer or authorized distributors?
All P4SMA33AH 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 P4SMA33AH meets industry standards.
7.What is the process for return or replacement of P4SMA33AH?
All P4SMA33AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33AH, 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 P4SMA33AH part is unused and in its original packaging.
Return procedure for P4SMA33AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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