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Taiwan Semiconductor Corporation P4SMA33C
- Part No.:
- P4SMA33C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33C.pdf
- Description:
- 400W, 33V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:7,489
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Product details
Overview
P4SMA33C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 33V working stand-off voltage (VWM), 47.7V maximum clamping voltage (VC) at 8.8A peak pulse current, and 400W peak pulse power rating under 10/1000μs waveform - making it suitable for automotive power supply surge suppression per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the P4SMA33C datasheet, P4SMA33C pinout, P4SMA33C application, or P4SMA33C equivalent, key selection considerations include its DO-214AC (SMA) package compatibility with automated placement, sub-1ps response time, <1μA reverse leakage at VWM, and bipolar operation enabling symmetrical clamping without polarity constraints in AC-coupled or floating systems.
Technical Context
The P4SMA33C is a unidirectional/bidirectional TVS diode configured as a single die in a DO-214AC package, with cathode band marking indicating polarity for unidirectional variants; the "C" suffix explicitly denotes bidirectional construction. Its silicon junction is glass passivated to ensure stable breakdown characteristics and low leakage across temperature.
It operates within a -55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements. Clamping performance is specified under standardized 10/1000μs double-exponential surge waveform, with derating applied above 25°C ambient per published pulse derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.8 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 33V nominal systems. |
| VBR min/max | 29.7 V / 36.3 V @ 1 mA - Verified breakdown threshold range ensuring reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | 47.7 V @ 8.8 A - Clamped voltage during 400W 10/1000μs surge; limits downstream IC stress to sub-48V level. |
| PPPM | 400 W - Peak pulse power handling capability under standard surge waveform; supports IEC 61000-4-5 Level 4 compliance when properly routed. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage ensures minimal standby power loss and no measurable loading on high-impedance circuits. |
| Response time | <1.0 ps - Sub-picosecond junction response enables effective suppression of fast ESD and lightning-induced edges. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case with matte tin-plated leads compliant with J-STD-002 solderability and UL 94V-0 flammability rating. Polarity marked by cathode band; for P4SMA33C (bidirectional), the band indicates center tap symmetry - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional polarity - either terminal connects to protected line; enables placement flexibility in AC or floating nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates parameter drift in industrial environments. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line capacitance discharge) - critical for automotive ECUs. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly without dry-pack or floor-life management. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life recycling. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 24V CAN/LIN bus interface circuitry from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching transceiver ICs. Use Value: Limits clamped voltage to 47.7V, well below 50V absolute max rating of common CAN transceivers like TJA1042, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding 24V DC digital input channels against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each optocoupler input leg, placed upstream of series current-limiting resistor. Use Value: Sub-1ps response ensures clamping initiates before transient propagates through RC filter, preserving signal integrity and input logic state fidelity. |
| LED Driver Power Supply Input | Smart Meter AC/DC Auxiliary Supply |
Use Scenario: Suppressing line-to-line and line-to-ground surges on constant-current LED driver input (12–48V DC). IC Role / Device Role / Timing Role: Secondary-level TVS after bulk filtering but before primary-side controller IC (e.g., UCC28056). Use Value: 400W rating handles repetitive switching noise and infrequent lightning-induced surges without degradation, extending driver MTBF. |
Use Scenario: Protecting isolated auxiliary supply input (e.g., 12V derived from mains) in utility smart meters exposed to grid transients. IC Role / Device Role / Timing Role: First-stage transient suppressor on secondary-side DC bus feeding meter SoC and RF module. Use Value: Bidirectional operation accommodates floating ground architecture; <1μA leakage avoids battery drain in backup power modes. |
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 (Bourns) | Same DO-214AA package; 600W PPPM rating; slightly higher VC = 53.3V @ 7.5A. | Higher power handling suits more severe surge environments (e.g., outdoor telecom); larger footprint may require layout change. | Select when >400W surge margin is required and PCB space allows SMB package. |
| 1.5SMC33CA (ON Semiconductor) | DO-214AB package; 1500W PPPM; VC = 53.3V @ 28.3A; higher IR = 5μA @ VWM. | Designed for higher-energy threats (IEC 61000-4-5 Level 4); not optimized for ultra-low leakage. | Prefer for heavy industrial mains-connected equipment where leakage is secondary to energy absorption. |
Compared with SMBJ33CA and 1.5SMC33CA, the P4SMA33C offers optimal balance of compact DO-214AC footprint, 400W surge rating, 47.7V clamping, and <1μA leakage - ideal for space-constrained, low-power, automotive-grade DC protection where precise voltage limiting and minimal standby loss are critical.
Availability
P4SMA33C is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, LED lighting drivers, and smart meter auxiliary supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA33C 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial, automotive, and consumer applications.
The P4SMA33C belongs to TSC's P4SMAxxC family of surface-mount TVS diodes engineered specifically for high-reliability, bidirectional surge protection in space-constrained DC power systems - emphasizing low leakage, fast response, and automotive-grade qualification.
FAQ
What does the "C" suffix in P4SMA33C indicate?
The "C" suffix in P4SMA33C designates a bidirectional configuration, meaning the device provides symmetrical clamping in both polarities without requiring orientation during placement. Unlike unidirectional variants (e.g., P4SMA33A), the P4SMA33C has no cathode band functional significance - both terminals behave identically under reverse or forward surge conditions, simplifying layout in AC-coupled or floating circuits.
What is the maximum clamping voltage of P4SMA33C and under what test condition?
The P4SMA33C has a maximum clamping voltage (VC) of 47.7 V, measured at a peak pulse current (IPPM) of 8.8 A under the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Is P4SMA33C compliant with automotive surge standards?
Yes, the P4SMA33C meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b - covering load dump, supply interruption, and capacitive coupling transients common in 12V/24V automotive electrical systems. Its 400W peak pulse power rating and 47.7V clamping voltage align with protection needs for ECUs, sensors, and body control modules.
What is the reverse leakage current specification for P4SMA33C at its working voltage?
The P4SMA33C exhibits a maximum reverse leakage current (IR) of less than 1 μA when biased at its working stand-off voltage (VWM) of 26.8 V. This ultra-low leakage ensures negligible power loss in always-on systems and prevents unintended loading of high-impedance sensor inputs or reference nodes in precision analog circuits.
Can P4SMA33C be used in place of unidirectional P4SMA33A in a DC power rail?
Yes, the P4SMA33C can replace P4SMA33A in most DC rail applications, but with important design implications: its bidirectional nature means it will clamp equally on positive and negative excursions, which is beneficial for noise immunity but requires verification that downstream components tolerate symmetric overvoltage. No PCB changes are needed since both share the DO-214AC package and pin-compatible terminals.
P4SMA33C 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA33C FAQ
1.How can I place an order for P4SMA33C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33C 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 P4SMA33C reliable?
The price and inventory of P4SMA33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33C is usually 5 days.
3.What payment methods are accepted for P4SMA33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33C?
P4SMA33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33C 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 P4SMA33C?
For technical support, including P4SMA33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33C requirements.
6.How does Aetrix verify that P4SMA33C is sourced from the original manufacturer or authorized distributors?
All P4SMA33C 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 P4SMA33C meets industry standards.
7.What is the process for return or replacement of P4SMA33C?
All P4SMA33C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33C, 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 P4SMA33C part is unused and in its original packaging.
Return procedure for P4SMA33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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