My Inquiry
My Account
Taiwan Semiconductor Corporation P6SMB33CA
- Part No.:
- P6SMB33CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CA.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,980
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB33CA from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 28.2 V, breakdown voltage range of 31.4–34.7 V at 1 mA, and clamping voltage of 45.7 V at 13.8 A peak pulse current. It protects DC power rails and signal lines in switching mode power supplies, adapters, and display electronics against ESD and surge events per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the P6SMB33CA datasheet, P6SMB33CA pinout, P6SMB33CA application, or P6SMB33CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AA (SMB) package compatibility, 150°C junction rating, sub-1μA leakage at 28.2 V, and verified compliance with automotive transient immunity standards.
Technical Context
The P6SMB33CA operates as a bipolar avalanche diode, symmetrically clamping transients in both forward and reverse directions without polarity dependence. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at VWM), while the 10/1000 μs waveform-rated 600 W peak pulse power supports robust surge handling in automotive and industrial environments.
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, enabling reliable operation up to 150 °C junction temperature. The device meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance, supporting high-yield automated assembly on SMB footprint PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - Confirmed breakdown threshold for bidirectional surge suppression |
| VC @ IPPM | 45.7 V at 13.8 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPSM | 600 W - Peak pulse power dissipation capability under standardized surge waveform |
| IR @ VWM | <1 μA - Ultra-low leakage ensures minimal standby power loss in always-on circuits |
| TJ max | 150 °C - Maximum junction temperature enabling use in thermally constrained enclosures |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass and UL 94V-0 molding |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; P6SMB33CA is bidirectional and marked with "LTJ" code - no polarity band required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional clamping node | Either terminal serves as input/output - no fixed anode/cathode; connects across protected line and ground or between differential lines |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and thermal path to PCB copper; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over time and temperature, critical for long-life automotive applications |
| ISO 7637-2 compliance | Validated immunity to Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling noise) |
| Fast response time | <1.0 ps rise time from 0 V to VBR(min), enabling protection of high-speed digital interfaces |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; compatible with standard SMT assembly lines without special handling |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - suitable for green manufacturing and export compliance |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Input rectifier stage and secondary-side DC bus in offline SMPS designs subject to line surges and load-dump transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across bulk capacitor or MOSFET drain-source to clamp repetitive switching spikes and external surges. Use Value: Limits transient voltage to ≤45.7 V, preventing overvoltage failure of 60 V-rated MOSFETs and electrolytic capacitors rated for 50 V DC. | Use Scenario: Secondary-side output rail protection in universal-input wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Parallel-connected TVS across +VOUT/GND to absorb ESD events from USB/DC jack insertion and fast transient coupling. Use Value: Sub-1 μA leakage avoids battery-drain issues in always-connected standby modes; SMB footprint enables compact layout near connector. |
| Television Power Boards | Monitor Backlight Drivers |
Use Scenario: Protection of main 12 V/24 V logic and backlight power rails in LED-backlit TVs exposed to EMC test pulses and field surges. IC Role / Device Role / Timing Role: Mounted directly at board edge connectors and DC input terminals to intercept incoming transients before reaching DC-DC converters. Use Value: 600 W rating handles multiple ISO 7637-2 Pulse 1 events without degradation; 150 °C rating supports operation near heat-generating power stages. | Use Scenario: Surge suppression on CCFL or LED driver high-voltage return paths where fast-rising transients induce destructive voltage overshoot. IC Role / Device Role / Timing Role: Bidirectional placement between HV return and chassis ground to clamp common-mode transients induced by inverter switching. Use Value: Symmetrical clamping ensures equal protection regardless of transient polarity; 45.7 V clamping prevents gate oxide breakdown in driver ICs with 50 V absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA (Bourns) | Same DO-214AA package, identical VWM/VBR/VC specs, but higher typical IR (≤5 μA vs. <1 μA) | Suitable where ultra-low leakage is not required; slightly lower surge lifetime endurance per JEDEC standards | Select when sourcing flexibility is prioritized and leakage budget allows ≤5 μA at 28.2 V |
| 1.5SMC33CA (ON Semiconductor) | Same electrical specs but larger DO-214AB (SMC) package (7.11 × 6.22 mm vs. 4.57 × 3.94 mm); 1.5 kW rating | Requires PCB layout change; preferred for higher-reliability industrial systems needing margin beyond 600 W | Select only if board space permits larger footprint and system-level surge testing exceeds 600 W requirements |
Compared with SMBJ33CA and 1.5SMC33CA, the P6SMB33CA delivers identical clamping performance in the smallest SMB footprint with the lowest leakage, making it optimal for space-constrained, low-power-consumption designs requiring automotive-grade transient immunity.
Availability
P6SMB33CA is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply with full traceability and lifecycle management.
Supply support for P6SMB33CA 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, computing, and consumer markets.
The P6SMB33CA belongs to TSC's P6SMB series of 600 W surface-mount TVS diodes designed specifically for cost-sensitive, high-volume applications demanding ISO 7637-2 compliance and automated assembly compatibility.
FAQ
What is the polarity configuration of the P6SMB33CA?
The P6SMB33CA is a bidirectional TVS diode, meaning it functions identically in both forward and reverse bias directions. Unlike unidirectional variants (e.g., P6SMB33C), it has no cathode band marking and is intended for applications where transient polarity is unpredictable - such as across DC power rails or differential signal lines. Its symmetrical breakdown ensures consistent clamping regardless of surge direction.
Does the P6SMB33CA meet automotive transient immunity standards?
Yes, the P6SMB33CA meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling noise). This certification is explicitly stated in the official Taiwan Semiconductor datasheet (Version Q2209) and confirms its suitability for 12 V and 24 V automotive subsystems including infotainment power supplies and body control modules.
What is the maximum clamping voltage of the P6SMB33CA under surge conditions?
The maximum clamping voltage (VC) of the P6SMB33CA is 45.7 V at a peak pulse current (IPPM) of 13.8 A, measured using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a worst-case surge event and is critical for ensuring downstream components remain within their absolute maximum voltage ratings.
Can the P6SMB33CA be used in place of a unidirectional TVS like P6SMB33C?
No - the P6SMB33CA is not a drop-in replacement for unidirectional types such as P6SMB33C. While both share the same VWM, VBR, and VC values, the P6SMB33C conducts in forward bias like a standard diode and blocks only in reverse, whereas the P6SMB33CA clamps in both directions. Using it in a forward-biased rectifier path would cause unintended conduction and potential circuit malfunction.
What is the thermal resistance profile of the P6SMB33CA?
The P6SMB33CA has a junction-to-case thermal resistance (RθJC) of 10 °C/W and a junction-to-ambient thermal resistance (RθJA) of 55 °C/W, as specified in the Taiwan Semiconductor datasheet. These values assume standard PCB mounting with adequate copper pour; actual RθJA will improve with thermal vias and heatsinking, supporting reliable operation up to the rated 150 °C maximum junction temperature.
P6SMB33CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- 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):
- 13.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB33CA FAQ
1.How can I place an order for P6SMB33CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CA 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 P6SMB33CA reliable?
The price and inventory of P6SMB33CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CA is usually 5 days.
3.What payment methods are accepted for P6SMB33CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CA?
P6SMB33CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CA 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 P6SMB33CA?
For technical support, including P6SMB33CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CA requirements.
6.How does Aetrix verify that P6SMB33CA is sourced from the original manufacturer or authorized distributors?
All P6SMB33CA 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 P6SMB33CA meets industry standards.
7.What is the process for return or replacement of P6SMB33CA?
All P6SMB33CA units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CA, 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 P6SMB33CA part is unused and in its original packaging.
Return procedure for P6SMB33CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CA 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…
