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Vishay General Semiconductor - Diodes Division P6SMB33CA-M3/52
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- Part No.:
- P6SMB33CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CA-M3/52.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,942
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Product details
Overview
P6SMB33CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33 V standoff voltage (VWM), 45.7 V maximum clamping voltage (VC) at 13.1 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P6SMB33CA-M3/52 datasheet, P6SMB33CA-M3/52 pinout, P6SMB33CA-M3/52 application, or P6SMB33CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT assembly on SMB (DO-214AA) footprint.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient events exceeding its breakdown voltage (VBR min = 31.4 V, max = 34.7 V at 1 mA), it rapidly switches to low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and fast response time (<1 ns).
Rated for -65 °C to +150 °C junction temperature, it supports repetitive transients at 0.01% duty cycle and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The bidirectional configuration eliminates polarity concerns in AC-coupled or differential signal paths such as RS-485, CAN bus, and Ethernet PHY interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 28.2 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 31.4 V to 34.7 V at 1 mA - Tight tolerance ensures predictable turn-on across production lots and temperature |
| VC (Clamping) | 45.7 V at 13.1 A IPPM - Limits voltage seen by protected IC to safe level during 10/1000 μs surge |
| PPPM | 600 W - Sustains high-energy transients like ISO 7637-2 Pulse 1/2a/5a without degradation |
| RθJL | 20 °C/W - Enables effective heat transfer to PCB copper pads, critical for reliability under repeated surges |
| Package | SMB (DO-214AA) - Standardized 2-pin SMT outline with 5.0 mm × 5.0 mm thermal pad area per terminal |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); meets JESD201 Class 2 whisker resistance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally between them during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or differential buses without external polarity management |
| 600 W peak pulse power | Withstands automotive load-dump and inductive switching transients per ISO 7637-2 and IEC 61000-4-5 |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1 μA) across temperature and humidity stress |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without preconditioning or baking |
| Halogen-free construction (M3) | Meets environmental requirements for automotive and industrial end-equipment without compromising surge performance |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed across sensor supply and ground to clamp transients before they reach analog front-end ICs. Use Value: Maintains signal integrity under ISO 16750-2 pulses up to 100 V/100 ms while preserving low-leakage bias conditions. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to EFT and surge noise on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pair (A/B) and ground to suppress common-mode and differential-mode transients. Use Value: Prevents latch-up or permanent damage to MAX1487/SP3485-level transceivers during 4 kV ESD contact discharge per IEC 61000-4-2. |
| Telecom Line Card Protection | Consumer Power Adapter Input |
Use Scenario: Front-end surge suppression on DSL or POTS line cards handling lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary clamping device in series with gas discharge tube (GDT) for hybrid protection architecture. Use Value: Limits let-through voltage to <50 V during 10/700 μs telecom surges (IEC 61000-4-5), enabling downstream MOV/GDT coordination. |
Use Scenario: Secondary-side overvoltage clamp on 24 V DC input rails of smart home hubs after AC/DC conversion. IC Role / Device Role / Timing Role: Fast-acting shunt protector responding within nanoseconds to switching regulator fault or capacitor failure. Use Value: Holds rail voltage at 45.7 V during 13.1 A transient, preventing damage to 3.3 V/5 V LDOs and microcontrollers downstream. |
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-T | Same VWM (28.2 V), VC (45.7 V), and SMB package; rated for 600 W but uses different internal chip design and JEDEC qualification. | Identical placement and clamping behavior; validated for same automotive and industrial standards. | Preferred where second-source qualification or alternate manufacturing lot traceability is required. |
| 1.5SMC33CA | Higher package thermal resistance (RθJA ≈ 125 °C/W vs. 100 °C/W); same electrical specs but larger SMC (DO-214AB) footprint. | Requires PCB layout change; suitable only when higher power derating margin or legacy board reuse is needed. | Select only if existing SMC footprint must be retained or when >1000 W pulse handling is anticipated with heatsinking. |
Compared with SMBJ33CA-T and 1.5SMC33CA, P6SMB33CA-M3/52 offers halogen-free compliance, tighter VBR tolerance (±5%), and optimized thermal performance for dense SMT layouts - making it ideal for new automotive and industrial designs requiring MSL Level 1 and AEC-Q101 alignment.
Availability
P6SMB33CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, and telecom line protection requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.
Supply support for P6SMB33CA-M3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications systems - engineered for automated assembly, thermal robustness, and consistent clamping across temperature and life cycle.
FAQ
What is the maximum clamping voltage of P6SMB33CA-M3/52 under a 10/1000 μs surge?
The maximum clamping voltage (VC) of P6SMB33CA-M3/52 is 45.7 V at 13.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. P6SMB33CA-M3/52 maintains this clamping performance across its full operating temperature range.
Is P6SMB33CA-M3/52 suitable for automotive applications?
Yes, P6SMB33CA-M3/52 is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes (e.g., P6SMB33CAHM3_B/H). While the M3/52 variant itself is commercial-grade, its construction - including glass-passivated junction, MSL Level 1 rating, and halogen-free materials - aligns with automotive reliability requirements. For certified automotive use, specify the HM3_B or HM3_I ordering code. P6SMB33CA-M3/52 serves as the baseline platform for those qualified versions.
How does the bidirectional configuration of P6SMB33CA-M3/52 affect PCB layout?
The bidirectional configuration of P6SMB33CA-M3/52 eliminates polarity constraints: no cathode band marking is present, and both terminals are functionally identical. This simplifies PCB layout by removing orientation checks during automated placement and enables symmetric routing in differential or AC-coupled paths. P6SMB33CA-M3/52 can be placed across any two nodes requiring mutual transient suppression - such as RS-485 A/B lines or transformer-coupled Ethernet pairs - without regard to signal direction or DC bias polarity.
What is the thermal resistance from junction to lead (RθJL) for P6SMB33CA-M3/52?
The typical thermal resistance from junction to lead (RθJL) for P6SMB33CA-M3/52 is 20 °C/W. This low value reflects efficient heat conduction from the silicon die through the metallized leads into the PCB copper pads, supporting reliable operation under repetitive surge conditions. When mounted per recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) pad layout, P6SMB33CA-M3/52 achieves stable junction temperatures even during burst-mode transients at 0.01% duty cycle.
Does P6SMB33CA-M3/52 meet RoHS and halogen-free requirements?
Yes, P6SMB33CA-M3/52 is halogen-free and RoHS-compliant, as indicated by the "M3" suffix in its part number. It satisfies JEDEC J-STD-020 MSL Level 1 moisture sensitivity classification and passes JESD201 Class 2 whisker resistance testing. These attributes make P6SMB33CA-M3/52 suitable for environmentally regulated markets including EU automotive, industrial control, and consumer electronics where material declarations and process compatibility are mandatory.
P6SMB33CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- 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):
- 13.1A
- 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 (SMBJ)
P6SMB33CA-M3/52 FAQ
1.How can I place an order for P6SMB33CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CA-M3/52 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 P6SMB33CA-M3/52 reliable?
The price and inventory of P6SMB33CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CA-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB33CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CA-M3/52?
P6SMB33CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CA-M3/52 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 P6SMB33CA-M3/52?
For technical support, including P6SMB33CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CA-M3/52 requirements.
6.How does Aetrix verify that P6SMB33CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB33CA-M3/52 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 P6SMB33CA-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB33CA-M3/52?
All P6SMB33CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CA-M3/52, 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 P6SMB33CA-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB33CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CA-M3/52 Tags
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