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Taiwan Semiconductor Corporation P4SMA33CH
- Part No.:
- P4SMA33CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CH.pdf
- Description:
- 400W, 33V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:3,420
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Product details
Overview
P4SMA33CH from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with breakdown voltage 29.7–36.3 V at 1 mA, clamping voltage 47.7 V at 8.8 A (10/1000 µs), and working stand-off voltage 26.8 V. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive power line protection.
For engineers reviewing the P4SMA33CH datasheet, P4SMA33CH pinout, P4SMA33CH application, or P4SMA33CH equivalent, this device serves as a robust, fast-response (sub-1 ps) overvoltage clamp for DC/DC converters, SMPS input rails, and automotive body electronics where low leakage (<1 µA at 26.8 V) and high surge immunity are critical.
Technical Context
The P4SMA33CH operates as a unidirectional avalanche diode, designed to shunt transient energy above its breakdown threshold while maintaining low dynamic impedance during clamping. Its glass-passivated junction ensures stable VBR tolerance (±5% typical) and long-term reliability under repeated surge stress.
It complies with AEC-Q101 stress tests including temperature cycling, humidity bias, and mechanical shock, and supports automated SMT placement with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.8 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR @ IT=1 mA | 29.7–36.3 V - Breakdown voltage range defining turn-on threshold under standardized test current |
| VC @ IPPM=8.8 A | 47.7 V - Clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 400 W - Peak pulse power handling capability per single non-repetitive surge event |
| IR @ VWM | <1 µA - Ultra-low reverse leakage ensures minimal standby power loss in battery-sensitive systems |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; terminals are matte tin-plated for reliable reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink reference | Connected to protected circuit ground or low-side return path during clamping |
| Cathode | Transient current source | Connected to protected line (e.g., +12 V rail); polarity mark indicates cathode end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability across temperature cycling, HAST, and mechanical stress |
| Sub-1 ps response time | Enables clamping before sensitive ICs experience overvoltage damage in fast-edge transients |
| Glass-passivated junction | Provides stable electrical parameters and enhanced moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guarantees survivability against real-world automotive load-dump and inductive-switching pulses |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump and jump-start surges in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 12 V supply and local LDO input. Use Value: Limits transient voltage to ≤47.7 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies downstream. | Use Scenario: Shields isolated flyback or buck converter primary-side controller from input line surges in factory automation power supplies. IC Role / Device Role / Timing Role: Primary-side overvoltage clamp on bulk capacitor input rail before PWM controller. Use Value: Absorbs 400 W peak pulses without degradation, preserving regulation stability and eliminating need for redundant crowbar circuits. |
| LED Driver Power Input | Telecom Power Adapter Output |
Use Scenario: Safeguards constant-current LED driver ICs from induced transients on 24 V or 48 V bus lines in streetlight and signage applications. IC Role / Device Role / Timing Role: Line-to-ground TVS on DC input terminal before EMI filter and PFC stage. Use Value: Maintains <1 µA leakage at 26.8 V, avoiding false triggering of upstream OVP circuits during normal operation. | Use Scenario: Suppresses switching noise and line surges on secondary-side 5 V/12 V outputs of AC/DC adapters used in network equipment. IC Role / Device Role / Timing Role: Output-side unidirectional clamp referenced to common ground, protecting USB or PoE interface ICs. Use Value: Clamps to 47.7 V within sub-nanosecond, preventing data corruption or reset events in connected Ethernet PHYs or USB controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | 600 W rating, SMA package, bidirectional variant standard; VC = 53.3 V at 11.2 A | Higher power handling but higher clamping voltage; suitable where surge margin exceeds 47.7 V | Select SMBJ33A when system-level surge testing requires >400 W headroom or bidirectional protection is needed |
| 1.5SMC33A | DO-214AB (SMC) package, 1500 W rating, VC = 53.3 V at 28.3 A | Larger footprint and higher clamping; intended for industrial mains-input stages | Choose 1.5SMC33A only if PCB layout allows SMC package and system must survive 1.5 kW transients |
Compared with SMBJ33A and 1.5SMC33A, the P4SMA33CH offers tighter clamping (47.7 V vs. ≥53.3 V), lower leakage, and AEC-Q101 validation-making it optimal for space-constrained, automotive-grade 400 W surge protection where voltage margin is critical.
Availability
P4SMA33CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, LED driver inputs, and telecom adapter outputs requiring stable component supply across extended temperature and lifecycle demands.
Supply support for P4SMA33CH 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 P4SMA33CH belongs to TSC's AEC-Q101-qualified P4SMAxH series, engineered specifically for high-reliability transient suppression in harsh automotive and industrial power environments.
FAQ
What is the polarity configuration of the P4SMA33CH?
The P4SMA33CH is a unidirectional TVS diode with cathode marked by a band on the DO-214AC (SMA) package. It conducts only when the cathode is positive relative to the anode, making it suitable for DC line-to-ground protection where polarity is fixed. This differs from bidirectional variants like P4SMA33CH's counterpart P4SMA33CAH, which protects AC or reversible DC lines.
Does the P4SMA33CH meet automotive qualification standards?
Yes, the P4SMA33CH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. Its construction-including glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1-ensures suitability for under-hood and body electronics applications where thermal cycling and humidity exposure are routine.
What is the maximum clamping voltage of the P4SMA33CH under surge conditions?
The P4SMA33CH has a maximum clamping voltage (VC) of 47.7 V at 8.8 A peak pulse current (10/1000 µs waveform). This value is guaranteed across temperature and process variation, ensuring downstream components see no more than 47.7 V during standardized surge events-critical for protecting 3.3 V, 5 V, or 12 V logic and power ICs.
Can the P4SMA33CH be used in bidirectional signal lines?
No, the P4SMA33CH is unidirectional and not rated for bidirectional operation. For AC or polarity-agnostic protection, use the bidirectional variant P4SMA33CAH (marked CTJ), which provides symmetrical clamping in both directions and shares the same VBR, VC, and power ratings-but with dual-polarity breakdown behavior.
What is the leakage current specification for the P4SMA33CH at its working voltage?
The P4SMA33CH exhibits maximum reverse leakage current (IR) of 1 µA at its working stand-off voltage (VWM) of 26.8 V, measured at 25°C. This ultra-low leakage minimizes quiescent power loss and avoids interference with high-impedance sensing or battery-backed circuits-key for always-on automotive modules and energy-efficient industrial systems.
P4SMA33CH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
P4SMA33CH FAQ
1.How can I place an order for P4SMA33CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CH 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 P4SMA33CH reliable?
The price and inventory of P4SMA33CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CH is usually 5 days.
3.What payment methods are accepted for P4SMA33CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CH?
P4SMA33CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CH 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 P4SMA33CH?
For technical support, including P4SMA33CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CH requirements.
6.How does Aetrix verify that P4SMA33CH is sourced from the original manufacturer or authorized distributors?
All P4SMA33CH 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 P4SMA33CH meets industry standards.
7.What is the process for return or replacement of P4SMA33CH?
All P4SMA33CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CH, 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 P4SMA33CH part is unused and in its original packaging.
Return procedure for P4SMA33CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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