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Taiwan Semiconductor Corporation P6SMB33H
- Part No.:
- P6SMB33H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33H.pdf
- Description:
- 600W, 33V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,965
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Product details
Overview
P6SMB33H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 29.7–36.3 V, clamping voltage of 47.7 V at 13.0 A peak pulse current, and stand-off voltage of 26.8 V. It features glass-passivated junction, AEC-Q101 qualification, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and EFT immunity.
For engineers reviewing the P6SMB33H datasheet, P6SMB33H pinout, P6SMB33H application, or P6SMB33H equivalent, this device is selected for robust overvoltage protection in 24 V automotive power rails, industrial sensor interfaces, and DC-DC converter input stages where fast clamping (<1.0 ps response), low leakage (<1 µA @ 26.8 V), and DO-214AA package compatibility with automated SMT placement are critical.
Technical Context
The P6SMB33H operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its 600 W peak pulse power rating (10/1000 µs waveform) and 47.7 V clamping voltage ensure safe voltage limiting during ISO 7637-2 Pulse 2b (inductive switch-off) and Pulse 5a (load dump) events on 24 V systems.
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, supporting operation up to TJ = 150 °C. The device uses a single-die DO-214AA (SMB) package with matte tin-plated leads, JESD201 Class 2 whisker resistance, and UL 94V-0 molding compound - optimized for high-reliability automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 29.7 V / 36.3 V - Ensures reliable triggering above 24 V nominal rail while tolerating manufacturing spread and temperature drift |
| VWM | 26.8 V - Maximum continuous reverse operating voltage; maintains <1 µA leakage during normal 24 V system operation |
| VC @ IPPM | 47.7 V @ 13.0 A - Clamped voltage during 10/1000 µs surge; stays below 50 V absolute max for downstream 5 V/3.3 V logic protection |
| PPPSM | 600 W - Peak pulse power handling per ISO 7637-2 Pulse 5a (load dump), enabling single-device protection without parallel stacking |
| TJ max | +150 °C - Supports under-hood automotive environments and high-power density board layouts without derating |
| Package | DO-214AA (SMB) - Standardized 4.5 × 3.9 mm surface-mount footprint compatible with IPC-7351B land patterns and pick-and-place equipment |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; dual-leaded, single-die unidirectional configuration; polarity indicated by black band on cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground plane; carries full surge return current during clamping |
| Cathode | Protected line terminal | Connected to 24 V supply rail or signal line; reverse-biased during transients to initiate avalanche conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass-passivated junction | Eliminates surface contamination sensitivity and ensures stable VBR over lifetime and humidity exposure |
| Clamping response <1.0 ps | Enables protection of high-speed CAN FD, LIN, and sensor analog front-ends against sub-nanosecond ESD events |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Provides full compliance for 12 V/24 V vehicle electrical system immunity without external filtering components |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow; no baking required prior to standard Pb-free soldering processes |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 24 V battery feed to body control module (BCM) exposed to load dump and alternator ripple. IC Role / Device Role: Primary overvoltage clamp on main power input, placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤47.7 V, preventing damage to 40 V-rated input capacitors and regulator ICs without derating margin loss. |
Use Scenario: 4–20 mA current loop transmitter connected to PLC analog input with long cable runs. IC Role / Device Role: Reverse-polarity and surge protector on loop supply line, guarding against induced lightning surges and field wiring faults. Use Value: Withstands 600 W pulses while maintaining <1 µA leakage at 26.8 V, preserving loop accuracy and avoiding false zero-current detection. |
| DC-DC Converter Input Stage | Automotive Lighting Driver Protection |
Use Scenario: 24 V input to buck converter supplying 5 V to infotainment head unit. IC Role / Device Role: First-line transient suppressor before input EMI filter and converter controller IC. Use Value: Fast clamping prevents voltage overshoot from propagating through LC filter, reducing risk of MOSFET gate oxide failure and controller latch-up. |
Use Scenario: LED headlamp driver subjected to PWM switching noise and load dump during ignition cycles. IC Role / Device Role: Unidirectional TVS across driver IC supply pins to absorb inductive kickback and ISO 7637-2 Pulse 2b energy. Use Value: 47.7 V clamping protects 60 V-rated driver FETs and avoids thermal runaway during repeated 100 ms load dump events. |
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 | Bi-directional configuration; VBR = 36.7–40.6 V; VC = 53.3 V @ 11.2 A; same DO-214AA package | Required where bidirectional protection is needed (e.g., AC-coupled data lines); not suitable for DC power rail polarity-sensitive designs | Select SMBJ33A only if symmetrical clamping in both polarities is mandatory; P6SMB33H offers lower clamping voltage for unidirectional 24 V use. |
| 1.5SMC33A | Same unidirectional function but DO-214AB (SMC) package; 1.5 kW rating; VC = 49.9 V @ 30.1 A; larger 7.1 × 6.2 mm footprint | Used when higher surge capacity is required beyond 600 W, or when legacy SMC land patterns exist | Choose 1.5SMC33A only for >600 W surge requirements or existing SMC layout; P6SMB33H saves board space and cost in standard SMB-constrained designs. |
Compared with SMBJ33A and 1.5SMC33A, the P6SMB33H delivers optimal balance of low clamping voltage (47.7 V), compact DO-214AA footprint, and AEC-Q101 validation - making it the preferred choice for space-constrained, automotive-grade 24 V power rail protection where unidirectional operation suffices.
Availability
P6SMB33H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and DC-DC converter designs requiring stable component supply, AEC-Q101 compliance, and consistent DO-214AA packaging across production batches.
Supply support for P6SMB33H 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 with global automotive and industrial certifications.
The P6SMB33H belongs to TSC's AEC-Q101-qualified P6SMBxH series, engineered specifically for robust transient suppression in 12 V/24 V automotive power networks and industrial control systems demanding high reliability and standardized SMB packaging.
FAQ
What is the maximum clamping voltage of the P6SMB33H under standard test conditions?
The P6SMB33H has a maximum clamping voltage (VC) of 47.7 V when subjected to a 10/1000 µs peak pulse current of 13.0 A. This value is measured per IEC 61000-4-5 and ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs rated to 50 V or less remain within safe operating limits.
Is the P6SMB33H suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the P6SMB33H is explicitly AEC-Q101 qualified per the manufacturer's documentation. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD verification to meet automotive reliability requirements. This makes the P6SMB33H appropriate for under-hood and chassis-mounted applications where extended temperature range (−55 °C to +150 °C) and long-term stability are mandatory.
Does the P6SMB33H have bidirectional capability, or is it unidirectional only?
The P6SMB33H is a unidirectional TVS diode, designed to conduct only in reverse bias above its breakdown voltage. Its cathode band marking indicates polarity, and it must be installed with cathode toward the protected line and anode to ground. For bidirectional protection, the P6SMB33AH variant (with "A" suffix) or SMBJ33A would be required - the P6SMB33H itself does not provide symmetrical clamping.
What is the standoff voltage (VWM) of the P6SMB33H, and why is it important?
The P6SMB33H has a maximum working peak reverse voltage (VWM) of 26.8 V. This parameter defines the highest continuous DC or RMS voltage the device can block without significant leakage current - essential for ensuring minimal power loss and signal integrity in 24 V systems. At this voltage, reverse leakage remains below 1 µA, preserving efficiency and avoiding false triggering in always-on circuits.
Can the P6SMB33H be used in place of the older P6SMB33 without modification?
Yes, the P6SMB33H is a direct replacement for the non-H-suffix P6SMB33, sharing identical electrical specifications, DO-214AA package dimensions, and pinout. The "H" suffix denotes enhanced reliability screening and updated process controls per Taiwan Semiconductor's A2102 revision, but no PCB layout or schematic changes are required when upgrading from P6SMB33 to P6SMB33H in existing designs.
P6SMB33H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 13A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB33H FAQ
1.How can I place an order for P6SMB33H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33H 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 P6SMB33H reliable?
The price and inventory of P6SMB33H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33H is usually 5 days.
3.What payment methods are accepted for P6SMB33H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33H?
P6SMB33H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33H 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 P6SMB33H?
For technical support, including P6SMB33H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33H requirements.
6.How does Aetrix verify that P6SMB33H is sourced from the original manufacturer or authorized distributors?
All P6SMB33H 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 P6SMB33H meets industry standards.
7.What is the process for return or replacement of P6SMB33H?
All P6SMB33H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33H, 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 P6SMB33H part is unused and in its original packaging.
Return procedure for P6SMB33H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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