My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA33CA
- Part No.:
- P4SMA33CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CA.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA33CA 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 33 V working stand-off voltage (VWM), 31.4–34.7 V breakdown voltage (VBR) at 1 mA, 45.7 V clamping voltage (VC) at 9.0 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform - deployed in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA33CA datasheet, P4SMA33CA pinout, P4SMA33CA application, or P4SMA33CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AC (SMA) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1 µA reverse leakage at VWM, and junction temperature range of –55°C to +150°C.
Technical Context
The P4SMA33CA implements a glass-passivated silicon avalanche junction optimized for fast transient suppression with sub-nanosecond response time (<1.0 ps). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating circuits without polarity sensitivity.
It operates within a –55°C to +150°C junction temperature range and is rated for 400 W non-repetitive peak pulse power (10/1000 µs), with thermal derating above 25°C ambient per manufacturer curve Fig.2. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 31.4 V / 34.7 V at 1 mA - ensures reliable avalanche conduction onset across production lot |
| VC @ IPPM | 45.7 V at 9.0 A - limits downstream voltage stress during 10/1000 µs transients |
| PPPM | 400 W - sustains high-energy surges typical of automotive load dump or inductive switching |
| IR @ VWM | <1 µA - negligible standby power loss and minimal impact on high-impedance sensing nodes |
| TJ max | +150 °C - supports operation in thermally constrained PCB layouts near power components |
| Package | DO-214AC (SMA) - industry-standard SMT footprint with 0.060 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; two-terminal bidirectional device - no polarity assignment required for circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | Either terminal conducts during overvoltage in either polarity; symmetric clamping behavior eliminates orientation constraints |
| Case (non-connection) | Mechanical mounting | No electrical connection; body serves only as thermal mass and mechanical anchor |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, low-leakage avalanche performance across temperature and lifetime |
| ISO 7637-2 compliance | Validated for automotive-level transient immunity (Pulse 1, 2a, 2b, 3a, 3b) |
| Fast response time | <1.0 ps - clamps before sensitive ICs experience damaging voltage overshoot |
| Halogen-free construction | Meets IEC 61249-2-21 - supports RoHS-compliant and environmentally regulated designs |
| Moisture sensitivity level 1 | No dry-pack or bake requirement prior to reflow - simplifies SMT manufacturing flow |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier outputs against flyback spikes and cross-talk. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across input/output rails to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents cumulative degradation of power FETs and controller ICs by suppressing repetitive 400 W transients without leakage-induced efficiency loss. | Use Scenario: Safeguarding 12 V to 3.3 V/5 V point-of-load regulators in vehicle infotainment and ADAS modules. IC Role / Device Role / Timing Role: Standoff protection element absorbing load-dump pulses (ISO 7637-2 Pulse 5a) and alternator overshoot events. Use Value: Maintains regulator input voltage below 45.7 V during 9.0 A surges, avoiding brownout or latch-up in downstream microcontrollers. |
| LED Driver Circuit | Industrial Sensor Interface |
Use Scenario: Overvoltage protection for constant-current LED driver ICs subjected to cable discharge events in architectural lighting systems. IC Role / Device Role / Timing Role: Parallel-connected transient shunt that activates only during >28.2 V excursions, remaining invisible during normal 24 V operation. Use Value: Eliminates need for series impedance or active crowbar circuits while preserving driver efficiency and dimming linearity. | Use Scenario: Shielding analog front-end inputs (e.g., 4–20 mA loop receivers) from ESD and inductive coupling in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical), low-leakage protector placed directly at connector entry point. Use Value: Clamps transients to ≤45.7 V without distorting mV-level sensor signals due to sub-µA reverse leakage at 28.2 V. |
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; 600 W PPPM rating; slightly higher VC = 53.3 V at 7.5 A | Better suited for higher-energy transients but requires larger board area than SMA | Select SMBJ33CA when surge energy exceeds 400 W and DO-214AA layout is acceptable |
| 1.5KE33CA (ON Semiconductor) | Through-hole DO-15 package; 1500 W PPPM; VC = 53.3 V at 28.3 A; higher IR = 5 µA | Designed for legacy through-hole assembly; not suitable for dense SMT layouts | Choose 1.5KE33CA only for repair, retrofit, or prototyping where THT compatibility is mandatory |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA33CA offers optimal balance of compact DO-214AC footprint, 400 W surge handling, and ultra-low leakage - making it preferred for space-constrained, high-reliability SMT power rail protection where moderate surge levels dominate.
Availability
P4SMA33CA is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and industrial sensor interfaces requiring stable component supply and full traceability.
Supply support for P4SMA33CA 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 industrial and automotive markets.
The P4SMA33CA belongs to TSC's P4SMAx family of surface-mount TVS diodes engineered specifically for high-reliability, automated SMT deployment in harsh-environment power conversion and interface protection.
FAQ
What is the clamping voltage of P4SMA33CA and how is it measured?
The P4SMA33CA has a maximum clamping voltage (VC) of 45.7 V, measured at 9.0 A peak pulse current under the standardized 10/1000 µs double-exponential waveform. This value reflects the maximum voltage seen across the device terminals during a defined surge event and is critical for ensuring downstream ICs remain within their absolute maximum voltage ratings. The P4SMA33CA achieves this clamping performance while maintaining sub-µA leakage at its 28.2 V working stand-off voltage.
Is P4SMA33CA unidirectional or bidirectional, and how does the 'CA' suffix indicate this?
The 'CA' suffix in P4SMA33CA explicitly denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA33A), the P4SMA33CA has no anode/cathode polarity marking requirement and functions identically regardless of voltage polarity applied. This makes the P4SMA33CA ideal for AC-coupled lines, floating grounds, or differential bus protection where polarity reversal is possible.
Does P4SMA33CA meet automotive transient standards, and which specific tests apply?
Yes, the P4SMA33CA meets ISO 7637-2 for automotive transient immunity, specifically covering Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply line inductance), Pulse 3a (capacitive coupled noise), and Pulse 3b (capacitive coupled noise with ground bounce). These tests validate its suitability for 12 V and 24 V vehicle subsystems including infotainment, body control modules, and ADAS sensors - all while operating reliably across –55°C to +150°C junction temperature.
What is the moisture sensitivity level (MSL) of P4SMA33CA and what does it mean for assembly?
The P4SMA33CA is rated MSL Level 1 per J-STD-020, indicating unlimited floor life at ≤30°C/60% RH and no requirement for dry-packaging or pre-reflow baking. This simplifies SMT manufacturing logistics, eliminates moisture-related popcorning risk during reflow, and allows direct placement from standard tape-and-reel packaging. The device's DO-214AC (SMA) package uses UL 94V-0 compliant molding compound and matte tin-plated leads solderable per J-STD-002.
How does the temperature coefficient of breakdown voltage affect P4SMA33CA in wide-temperature applications?
The P4SMA33CA has a maximum temperature coefficient of VBR of 0.098 %/°C, meaning its breakdown voltage increases by up to 0.098% per degree Celsius rise in junction temperature. At +125°C, VBR may shift upward by ~9.8%, keeping the actual breakdown range within 31.4–34.7 V (25°C) to approximately 34.4–38.0 V. This predictable positive drift ensures consistent clamping margin across the full –55°C to +150°C operating range without premature conduction or failure to trigger.
P4SMA33CA 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA33CA FAQ
1.How can I place an order for P4SMA33CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CA 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 P4SMA33CA reliable?
The price and inventory of P4SMA33CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CA is usually 5 days.
3.What payment methods are accepted for P4SMA33CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CA?
P4SMA33CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CA 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 P4SMA33CA?
For technical support, including P4SMA33CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CA requirements.
6.How does Aetrix verify that P4SMA33CA is sourced from the original manufacturer or authorized distributors?
All P4SMA33CA 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 P4SMA33CA meets industry standards.
7.What is the process for return or replacement of P4SMA33CA?
All P4SMA33CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CA, 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 P4SMA33CA part is unused and in its original packaging.
Return procedure for P4SMA33CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
