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Vishay General Semiconductor - Diodes Division P6SMB33CAHE3/52
- Part No.:
- P6SMB33CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHE3/52.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB33CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 33 V standoff voltage (VWM), 36.7 V minimum breakdown voltage (VBR), 45.7 V maximum clamping voltage at 13.1 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P6SMB33CAHE3/52 datasheet, P6SMB33CAHE3/52 pinout, P6SMB33CAHE3/52 application, or P6SMB33CAHE3/52 equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and surge protection design validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling transient suppression without polarity constraints on AC-coupled or differential signal paths. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and robustness against repetitive surges under 0.01% duty cycle.
The device uses a low-inductance SMB package optimized for automated placement and thermal dissipation on 5.0 mm × 5.0 mm copper pads. With a 100 °C/W junction-to-ambient thermal resistance and 150 °C max junction temperature, it supports sustained operation in compact, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1.0 mA - Voltage at which device enters avalanche conduction; tight tolerance enables precise overvoltage threshold setting. |
| VC (Clamping Voltage) | 45.7 V at 13.1 A IPPM - Peak voltage seen by downstream components during worst-case 10/1000 μs surge; determines required voltage margin of protected ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability per JEDEC standard waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal DC loading on signal lines; preserves integrity of high-impedance analog or communication interfaces. |
| TJ max | 150 °C - Maximum junction temperature; supports operation in under-hood automotive or industrial ambient environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated terminals, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either direction; connects to line under protection (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or reference plane; requires low-inductance layout to minimize clamping overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power rails without polarity concerns. |
| 600 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements up to Level 4 (4 kV line-earth, 2 kV line-line) in properly laid-out PCBs. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without pre-baking; eliminates moisture-related assembly defects. |
| Glass-passivated junction | Ensures long-term stability of leakage current and breakdown voltage across temperature and lifetime stress conditions. |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field reliability. |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Communication Line |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamps transients between signal and ground, preserving ADC input integrity during 12 V system surges. Use Value: Prevents sensor signal corruption and microcontroller reset events caused by >30 V spikes, leveraging 28.2 V VWM and 45.7 V VC to maintain safe margin below 5 V rail limits. |
Use Scenario: Shielding RS-485 transceivers in factory automation PLCs from EFT bursts and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed across differential pair (A/B) and/or common-mode (A-GND, B-GND) to suppress common- and differential-mode transients. Use Value: Maintains data integrity under IEC 61000-4-4 (4 kV EFT) and IEC 61000-4-5 (2 kV surge) by limiting voltage excursion to ≤45.7 V during 13.1 A transient events. |
| Consumer USB Port ESD Protection | DC Power Input Surge Suppression |
|
Use Scenario: Safeguarding USB 2.0 data lines (D+, D−) in set-top boxes and smart displays against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp shunts ESD current away from USB PHY pins while minimizing signal distortion. Use Value: Achieves <1.0 μA leakage at 28.2 V VWM to avoid pull-up/pull-down interference, and responds in <1 ns to meet IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) requirements. |
Use Scenario: Front-end protection of 24 V DC power inputs in industrial HMIs and motor drives subjected to inductive kickback from solenoids or relays. IC Role / Device Role / Timing Role: Connected between VIN and GND to clamp positive/negative transients exceeding 28.2 V standoff level. Use Value: Absorbs 600 W surge energy without degradation, enabling compliance with UL 61000-4-5 and reducing need for secondary crowbar circuits or fuses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM (28.2 V), lower PPPM (400 W), SMA package (larger footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive AEC-Q101-critical designs | Select when cost sensitivity outweighs power rating and automotive qualification needs. |
| SMCJ33CA | Same VWM and PPPM (600 W), but SMC package (7.11 mm × 6.22 mm); higher IPPM (19.9 A), lower VC (49.9 V) | Higher clamping voltage reduces margin for 3.3 V or 5 V logic; larger footprint impacts dense layouts | Choose for higher surge current headroom where board space permits and clamping voltage margin allows. |
Compared with SMAJ33CA and SMCJ33CA, P6SMB33CAHE3/52 offers optimal balance of AEC-Q101 qualification, SMB footprint compatibility, and 45.7 V clamping - making it preferred for space-constrained automotive and industrial designs requiring validated reliability and precise voltage limiting.
Availability
P6SMB33CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB ports, and DC power input surge protection requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB33CAHE3/52 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets board-level transient suppression in automotive, industrial, and communications equipment, delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 variants for mission-critical use.
FAQ
What does the "CA" suffix indicate in P6SMB33CAHE3/52?
The "CA" suffix in P6SMB33CAHE3/52 denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P6SMB33A), this device clamps voltage transients equally in both directions - essential for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating power domains. The P6SMB33CAHE3/52 maintains identical electrical specs in forward and reverse bias, with no cathode band marking on the SMB package.
How does the HE3 suffix affect P6SMB33CAHE3/52's qualification and use?
The HE3 suffix in P6SMB33CAHE3/52 indicates RoHS-compliant construction and full AEC-Q101 qualification - validating its reliability for automotive applications including engine control, body electronics, and ADAS modules. This includes extended temperature cycling, high-temperature reverse bias (HTRB), and ESD testing beyond commercial-grade requirements. P6SMB33CAHE3/52 is not merely "suitable for automotive"; it is certified to the AEC-Q101 standard.
What is the maximum clamping voltage of P6SMB33CAHE3/52 under surge conditions?
The maximum clamping voltage (VC) of P6SMB33CAHE3/52 is 45.7 V at 13.1 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential surge waveform. This value represents the highest voltage imposed on protected circuitry during worst-case transient events and must be compared directly against the absolute maximum ratings of downstream ICs - for example, ensuring VC remains below 50 V for 5 V logic families.
Can P6SMB33CAHE3/52 replace unidirectional TVS diodes in existing designs?
P6SMB33CAHE3/52 can replace unidirectional TVS diodes only if the circuit topology supports bidirectional clamping - such as across differential pairs, AC signal lines, or isolated power rails. It must not be substituted in unidirectional configurations (e.g., anode-to-rail, cathode-to-ground) without verifying that reverse conduction does not disrupt biasing or cause latch-up. Layout changes may be needed due to absence of polarity marking on P6SMB33CAHE3/52.
What PCB layout practices maximize the surge protection performance of P6SMB33CAHE3/52?
To maximize P6SMB33CAHE3/52 performance, place it as close as possible to the protected interface connector with minimal trace length - ideally ≤5 mm from line to ground. Use dedicated 5.0 mm × 5.0 mm copper pads per terminal (per datasheet fig. 6), connect ground pad directly to solid ground plane via multiple vias, and avoid routing sensitive traces near the TVS. These practices reduce parasitic inductance, ensuring clamping occurs before voltage overshoot exceeds the 45.7 V VC rating of P6SMB33CAHE3/52.
P6SMB33CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 13.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB33CAHE3/52 FAQ
1.How can I place an order for P6SMB33CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHE3/52 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 P6SMB33CAHE3/52 reliable?
The price and inventory of P6SMB33CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CAHE3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHE3/52?
P6SMB33CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHE3/52 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 P6SMB33CAHE3/52?
For technical support, including P6SMB33CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHE3/52 requirements.
6.How does Aetrix verify that P6SMB33CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHE3/52 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 P6SMB33CAHE3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHE3/52?
All P6SMB33CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHE3/52, 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 P6SMB33CAHE3/52 part is unused and in its original packaging.
Return procedure for P6SMB33CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHE3/52 Tags
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