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Vishay General Semiconductor - Diodes Division P6SMB33A-E3/52
- Part No.:
- P6SMB33A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33A-E3/52.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,698
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Product details
Overview
P6SMB33A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 33 V breakdown voltage (VBR = 31.4–34.7 V at IT = 1.0 mA), 28.2 V stand-off voltage (VWM), and 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current (IPPM). It delivers 600 W peak pulse power (10/1000 μs waveform) for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the P6SMB33A-E3/52 datasheet, P6SMB33A-E3/52 pinout, P6SMB33A-E3/52 application, or P6SMB33A-E3/52 equivalent, key selection criteria include unidirectional polarity, 28.2 V working voltage, 45.7 V clamping performance under 13.1 A surge, RoHS-compliant matte tin plating, and MSL Level 1 moisture sensitivity rating for reflow compatibility.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (28.2 V) and rapidly transitions to low-impedance conduction above VBR (31.4–34.7 V), limiting transient voltages to ≤45.7 V at 13.1 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns).
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it supports repetitive surge duty cycles up to 0.01 % and withstands operating junction temperatures from –65 °C to +150 °C. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation without forced cooling in typical PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA test current - defines precise voltage threshold for avalanche conduction onset |
| VWM | 28.2 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 45.7 V at 13.1 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure |
| PPPM | 600 W - peak pulse power handling per standard 10/1000 μs waveform; validates robustness against common ESD/lightning surges |
| IPPM | 13.1 A - peak pulse current corresponding to VC; used to size upstream fusing or trace routing |
| Leakage ID | <1.0 μA at VWM - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge or DC bias |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential rail; avalanche conduction occurs here during transient overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients from inductive load switching without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements for industrial and consumer production |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and GND, conducting only during positive overvoltage events. Use Value: Limits transient voltage to ≤45.7 V, preventing damage to 33 V-rated LDOs and MCU I/O pins while maintaining <1.0 μA standby leakage. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitter outputs) from ESD and field-wiring faults in factory automation systems. IC Role / Device Role / Timing Role: Standoff-mode protector on signal path, activated only when induced transients exceed 28.2 V. Use Value: Clamps 1 kV ESD pulses to sub-50 V levels within nanoseconds, preserving 16-bit DAC accuracy and avoiding system resets. |
| Consumer Power Adapter Input Stage | Telecom Equipment Surge Interface |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD controllers and PMICs. IC Role / Device Role / Timing Role: Fast-response shunt element across regulated 5–20 V outputs, triggered by flyback transformer ringing or regulation fault. Use Value: Absorbs 600 W surges without latch-up, ensuring adapter continues operation after transient clearance and avoids false OVP shutdown. | Use Scenario: Front-end protection for Ethernet PHY power supplies and data line terminations in PoE-powered switches and routers. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V/5 V bias rails feeding magnetics and PHY ICs. Use Value: Withstands multiple 10/1000 μs surges per IEC 61000-4-5 Level 3 (1 kV), maintaining signal integrity and preventing PHY latch-up. |
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-T | Same SMB package, identical VBR (31.4–34.7 V), but rated for 600 W with tighter VC tolerance (45.7 V vs. 46.0 V); slightly higher RθJA (110 °C/W) | Valid for same industrial/sensor protection roles; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification needs and thermal margin permits |
| 1.5SMC33A | Larger SMC (DO-214AB) package (4.5 mm × 3.9 mm vs. 3.94 mm × 2.20 mm), same electrical specs but 1.5× higher thermal mass; 1000 W rating | Preferred where board space allows and higher single-pulse energy absorption is required | Choose when surge duty includes infrequent >600 W events and layout accommodates larger footprint |
Compared with SMBJ33A-T and 1.5SMC33A, P6SMB33A-E3/52 offers optimal balance of compact SMB footprint, RoHS-compliant E3 termination, and verified 600 W clamping performance-making it ideal for space-constrained industrial and automotive modules requiring consistent MSL Level 1 process compatibility.
Availability
P6SMB33A-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom equipment surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P6SMB33A-E3/52 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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, designed to meet stringent surge immunity standards (IEC 61000-4-5) while supporting automated SMT assembly and extended temperature operation.
FAQ
What is the breakdown voltage range of the P6SMB33A-E3/52?
The P6SMB33A-E3/52 has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This tight tolerance ensures predictable clamping behavior across production lots and temperature extremes, critical for protecting 3.3 V or 5 V logic rails fed through voltage regulators with known dropout margins. The P6SMB33A-E3/52 maintains this specification across its full operating junction temperature range (–65 °C to +150 °C).
Is the P6SMB33A-E3/52 suitable for automotive applications?
The base P6SMB33A-E3/52 is RoHS-compliant commercial-grade; however, the automotive-qualified variant is P6SMB33AHE3_B/H (with HE3 suffix and revision code B). That version is AEC-Q101 qualified, tested for temperature cycling, humidity, and mechanical shock per automotive requirements. The P6SMB33A-E3/52 itself is not AEC-Q101 certified, so for automotive use, engineers must specify the HE3 or HM3 suffix variants-not the E3/52 alone.
What does the "-E3/52" suffix indicate in P6SMB33A-E3/52?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance; "/52" specifies packaging in 7-inch plastic tape-and-reel format with 750 units per reel. This configuration ensures compatibility with high-speed pick-and-place equipment and satisfies IPC/JEDEC moisture sensitivity Level 1 (peak reflow ≤260 °C), making the P6SMB33A-E3/52 ready for standard lead-free SMT assembly without baking.
How does the clamping voltage of P6SMB33A-E3/52 compare to its standoff voltage?
The P6SMB33A-E3/52 has a standoff voltage (VWM) of 28.2 V and a maximum clamping voltage (VC) of 45.7 V at 13.1 A. This 17.5 V differential represents the voltage "headroom" available to protect downstream components: any transient exceeding 28.2 V triggers avalanche conduction, limiting the voltage seen by the protected circuit to no more than 45.7 V. This ratio (VC/VWM ≈ 1.62) reflects optimized junction design for low clamping ratio without sacrificing leakage or response time.
Can P6SMB33A-E3/52 be used in bidirectional configurations?
No-the P6SMB33A-E3/52 is strictly unidirectional, as indicated by the "A" suffix (vs. "CA" for bidirectional versions like P6SMB33CA). Its cathode band marks the high-side terminal, and it conducts only during positive overvoltage relative to anode. For bidirectional protection (e.g., AC lines or differential data buses), engineers must select the CA-suffixed variant; using P6SMB33A-E3/52 in reverse-biased AC applications would result in forward conduction and potential failure.
P6SMB33A-E3/52 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB33A-E3/52 FAQ
1.How can I place an order for P6SMB33A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33A-E3/52 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 P6SMB33A-E3/52 reliable?
The price and inventory of P6SMB33A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB33A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33A-E3/52?
P6SMB33A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33A-E3/52 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 P6SMB33A-E3/52?
For technical support, including P6SMB33A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33A-E3/52 requirements.
6.How does Aetrix verify that P6SMB33A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB33A-E3/52 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 P6SMB33A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB33A-E3/52?
All P6SMB33A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33A-E3/52, 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 P6SMB33A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB33A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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