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Taiwan Semiconductor Corporation P6SMB33CAH
- Part No.:
- P6SMB33CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAH.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
P6SMB33CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with minimum breakdown voltage 31.4 V, maximum clamping voltage 45.7 V at 13.8 A peak pulse current, and AEC-Q101 qualification for automotive electronics protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P6SMB33CAH datasheet, P6SMB33CAH pinout, P6SMB33CAH application, or P6SMB33CAH equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 55 °C/W), moisture sensitivity level 1 compliance, and real-world ESD/inductive-switching protection use cases - all critical for automotive power rail and signal line surge design.
Technical Context
The P6SMB33CAH is a glass-passivated, bipolar junction TVS diode engineered for fast response (<1.0 ps rise time from 0 V to VBR min) and low leakage (<1 µA at 28.2 V stand-off). Its symmetrical breakdown (31.4–34.7 V) and clamping (45.7 V @ 13.8 A) enable robust bidirectional transient suppression on data lines or DC rails without polarity concerns.
Designed per ANSI/IEEE C62.35, it meets ISO 7637-2 immunity requirements for automotive electronics and operates across –55 °C to +150 °C junction temperature. The DO-214AA package supports automated placement and delivers RθJC = 10 °C/W for effective thermal management under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V - Ensures reliable conduction onset within tight tolerance for predictable clamping threshold |
| VWM | 28.2 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 45.7 V @ 13.8 A - Peak clamped voltage during 10/1000 µs surge, defining worst-case overvoltage seen by protected IC |
| PPPSM | 600 W - Non-repetitive peak pulse power handling capability under standardized surge waveform |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Enables operation in under-hood automotive environments without derating |
| RθJA | 55 °C/W - Thermal resistance from junction to ambient, critical for PCB layout and heatsinking decisions |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; two-terminal device with symmetrical bidirectional conduction - no anode/cathode orientation required in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | Both terminals function identically; clamps voltage above ±31.4 V in either polarity - simplifies PCB routing and eliminates polarity-checking during assembly |
| Cathode band (marking) | Reference indicator | Visible band denotes terminal 1 per JEDEC DO-214AA standard; irrelevant for electrical function in CAH variant but aids visual inspection and traceability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - suitable for engine control, body electronics, and ADAS modules |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| Moisture sensitivity level 1 | Zero floor life limitation - can be stored indefinitely at ambient conditions without baking prior to reflow |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives - enables global automotive supply chain acceptance |
| ISO 7637-2 compliant | Withstands defined automotive transient pulses (Pulse 1, 2a, 2b, 3a, 3b) without degradation - eliminates need for additional external filtering |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 24 V vehicle battery lines feeding ECUs and infotainment systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between power rail and ground, limiting surges to ≤45.7 V to protect downstream DC-DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies during ISO 7637-2 Pulse 5a events up to 600 W peak power. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation equipment from ESD and relay-switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across differential or single-ended signal lines to shunt transients before reaching ADC inputs or op-amp front-ends. Use Value: Maintains signal fidelity with <1 µA leakage at 28.2 V and fast <1 ps response, avoiding distortion of mV-level sensor signals. |
| LED Lighting Driver Protection | Automotive CAN Transceiver Protection |
Use Scenario: Safeguarding constant-current LED drivers in headlamps and interior lighting from inductive kickback during MOSFET switching. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from flyback spikes generated by high-side switch turn-off. Use Value: Clamps transients to 45.7 V while sustaining 13.8 A peak pulse current - prevents driver IC overvoltage failure without requiring snubber RC networks. | Use Scenario: Protecting high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD256) from ESD and coupled transients on bus lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CAN_H and CAN_L to clamp common-mode surges while preserving signal integrity. Use Value: Symmetrical 31.4–34.7 V breakdown ensures equal clamping in both directions, maintaining CAN bus differential margin and meeting ISO 11898-2 EMC requirements. |
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 | Same DO-214AA package, identical VBR (31.4–34.7 V), but rated at 600 W with slightly higher VC = 53.3 V @ 11.3 A | Higher clamping voltage reduces margin for 3.3 V/5 V logic protection; better suited for 12–24 V power rail where 53.3 V is acceptable | Select SMBJ33CA only if board layout allows higher clamping voltage and thermal budget permits lower IPPM |
| 1.5KE33CA | Through-hole DO-15 package, same VBR range, 600 W rating, VC = 53.3 V @ 11.3 A, but larger footprint and incompatible with SMT assembly | Not suitable for automated production or space-constrained automotive modules; limited to prototyping or legacy through-hole designs | Choose 1.5KE33CA only for manual assembly or when DO-214AA footprint is unavailable |
Compared with SMBJ33CA and 1.5KE33CA, the P6SMB33CAH offers tighter clamping (45.7 V vs. 53.3 V), lower thermal resistance (55 °C/W vs. ~65 °C/W), and AEC-Q101 validation - making it optimal for high-reliability automotive signal and power line protection where layout density and surge margin are critical.
Availability
P6SMB33CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting drivers, and CAN bus protection requiring stable component supply and full AEC-Q101 compliance.
Supply support for P6SMB33CAH 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 P6SMB series targets high-reliability transient suppression in harsh environments - designed specifically for AEC-Q101-compliant automotive subsystems and industrial equipment demanding robust ESD/ISO 7637-2 immunity.
FAQ
What is the breakdown voltage range of the P6SMB33CAH?
The P6SMB33CAH has a guaranteed breakdown voltage range of 31.4 V to 34.7 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage protection design for 24 V automotive and industrial systems where the P6SMB33CAH is deployed.
Is the P6SMB33CAH suitable for bidirectional transient suppression?
Yes, the P6SMB33CAH is explicitly designed for bidirectional operation, as indicated by the "CAH" suffix. Its symmetrical VBR and VC characteristics apply equally in both polarities, enabling protection of AC-coupled signals, differential buses like CAN, and ungrounded power domains without polarity-sensitive placement - a key advantage of the P6SMB33CAH over unidirectional variants.
Does the P6SMB33CAH meet automotive qualification standards?
Yes, the P6SMB33CAH is AEC-Q101 qualified and tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. It also complies with J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance - confirming its suitability for under-hood and body-control module applications where the P6SMB33CAH is commonly specified.
What is the maximum clamping voltage of the P6SMB33CAH during a 10/1000 µs surge?
The P6SMB33CAH clamps to a maximum of 45.7 V at 13.8 A peak pulse current under the standardized 10/1000 µs waveform. This value defines the highest voltage imposed on protected circuitry during surge events and is critical for ensuring compatibility with 3.3 V, 5 V, and 24 V system components downstream of the P6SMB33CAH.
Can the P6SMB33CAH be used in automated SMT assembly processes?
Yes, the P6SMB33CAH uses the DO-214AA (SMB) package with matte tin-plated leads compliant with J-STD-002 solderability standards and is optimized for pick-and-place automation. Its low-profile construction and moisture sensitivity level 1 rating eliminate pre-bake requirements - enabling direct use in high-volume SMT lines where the P6SMB33CAH is integrated into automotive and industrial PCBs.
P6SMB33CAH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB33CAH FAQ
1.How can I place an order for P6SMB33CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAH 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 P6SMB33CAH reliable?
The price and inventory of P6SMB33CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CAH is usually 5 days.
3.What payment methods are accepted for P6SMB33CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAH?
P6SMB33CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAH 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 P6SMB33CAH?
For technical support, including P6SMB33CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAH requirements.
6.How does Aetrix verify that P6SMB33CAH is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAH 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 P6SMB33CAH meets industry standards.
7.What is the process for return or replacement of P6SMB33CAH?
All P6SMB33CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAH, 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 P6SMB33CAH part is unused and in its original packaging.
Return procedure for P6SMB33CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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