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Vishay General Semiconductor - Diodes Division P6SMB39CAHE3/52
- Part No.:
- P6SMB39CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAHE3/52.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,688
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Product details
Overview
P6SMB39CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 11.1 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB39CAHE3/52 datasheet, P6SMB39CAHE3/52 pinout, P6SMB39CAHE3/52 application, or P6SMB39CAHE3/52 equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM), while the low RθJA (100 °C/W) supports thermal reliability under repetitive surge conditions.
The device delivers precise clamping performance: at 11.1 A IPPM (10/1000 μs), VC remains ≤53.9 V - a 30% margin below typical 3.3 V or 5 V rail overvoltage thresholds. Its 0.100 %/°C VBR temperature coefficient ensures predictable response across -65 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - Maximum continuous reverse voltage before conduction; defines safe operating window for protected circuitry. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Voltage at which device enters avalanche; tight 10% tolerance enables accurate overvoltage threshold setting. |
| VC (Clamping) | 53.9 V at 11.1 A - Peak voltage seen by downstream IC during surge; limits stress on 3.3 V/5 V logic and analog front-ends. |
| PPPM | 600 W - Surge energy handling per 10/1000 μs pulse; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 events. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive use and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22-A108. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; compatible with standard 7" tape-and-reel (E3/52) feeding. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical avalanche junction; connects to line under protection (e.g., CAN_H or RS-485 A). |
| Cathode | Terminal K | Other side of symmetrical avalanche junction; connects to same line (e.g., CAN_L or RS-485 B); no functional distinction from Anode in bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities - eliminates need for polarity-aware layout in differential bus protection (e.g., CAN, RS-485). |
| AEC-Q101 qualification | Validated for automotive electronics - enables direct use in ADAS sensors, body control modules, and infotainment without requalification. |
| 600 W peak pulse power | Handles 10/1000 μs surges up to 11.1 A - exceeds IEC 61000-4-5 Level 3 (1 kV/2 kV line-earth) immunity requirements. |
| Low clamping ratio (VC/VBR) | 1.45 typical (53.9 V / 37.1 V) - minimizes let-through voltage to preserve margin for downstream 3.3 V or 5 V ICs. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - supports just-in-time SMT assembly without baking or dry pack handling. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs from load dump and inductive switching transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between transceiver pins and connector interface. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while preserving <1 μA leakage at 33.3 V nominal bus voltage. |
Use Scenario: Safeguarding RS-485 transceivers against ESD and lightning-induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Differential-line TVS mounted across A/B data lines near connector entry point. Use Value: Limits clamped voltage to ≤53.9 V during 1 kV EFT bursts, preventing latch-up in MAX1487 or SN65HVD7x transceivers. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
Use Scenario: Shielding USB 2.0 D+/D− lines from human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed inline with data traces before USB controller. Use Value: Delivers <100 pF junction capacitance (per fig. 4) and sub-1 ns response - avoids signal distortion at 480 Mbps full-speed operation. |
Use Scenario: Front-end surge suppression for ADSL/VDSL line drivers exposed to telecom central office lightning surges. IC Role / Device Role / Timing Role: Primary protection stage shunting common-mode surges between tip/ring and ground. Use Value: Withstands 600 W pulses at 10/1000 μs while maintaining ≤33.3 V DC hold-off - prevents false triggering during normal 48–56 V phantom power operation. |
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 SMB package, but lower PPPM (400 W), higher VC (53.3 V at 9.9 A), and no AEC-Q101 qualification. | Limited to commercial-grade consumer/industrial use; not approved for automotive under-hood deployment. | Select when cost sensitivity outweighs automotive qualification and 200 W lower surge margin is acceptable. |
| 1.5KE39CA | Higher-power through-hole (DO-201AE) variant: 1500 W PPPM, 58.1 V VC at 25.4 A, but larger footprint and incompatible with SMT-only lines. | Suitable for high-energy primary protection stages where PCB space allows axial/lead mounting. | Choose only if board design accommodates through-hole assembly and requires >600 W surge handling. |
Compared with SMAJ33CA and 1.5KE39CA, P6SMB39CAHE3/52 uniquely combines AEC-Q101 qualification, SMB SMT compatibility, and 600 W clamping in a single-source automotive-qualified solution - eliminating second-source validation overhead while ensuring consistent thermal derating and MSL handling.
Availability
P6SMB39CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB ports, and telecom DSL line protection requiring stable component supply and long-term lifecycle assurance.
Supply support for P6SMB39CAHE3/52 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, precision, and automotive-grade qualification.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for fast response, repeatable clamping, and robust thermal performance in compact surface-mount packages.
FAQ
What is the clamping voltage of P6SMB39CAHE3/52 at its rated peak pulse current?
The P6SMB39CAHE3/52 has a maximum clamping voltage (VC) of 53.9 V at 11.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and ensures predictable overvoltage limiting for downstream 3.3 V or 5 V circuits. The P6SMB39CAHE3/52 maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is P6SMB39CAHE3/52 qualified for automotive applications?
Yes, P6SMB39CAHE3/52 carries AEC-Q101 qualification, verified per stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction. This makes P6SMB39CAHE3/52 suitable for under-hood and cabin applications such as ADAS camera modules, body control units, and infotainment power rails.
How does the bidirectional design of P6SMB39CAHE3/52 affect its circuit implementation?
The bidirectional design of P6SMB39CAHE3/52 means it functions identically in both polarities - no cathode band marking is present, and either terminal can connect to either side of a differential or AC-coupled line. This simplifies layout for interfaces like CAN, RS-485, or USB, eliminating polarity verification during assembly and enabling symmetric placement across signal pairs. The P6SMB39CAHE3/52 achieves matched VBR and VC in both directions per datasheet specifications.
What is the thermal resistance of P6SMB39CAHE3/52, and how does it impact PCB layout?
P6SMB39CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation under repetitive surges, PCB layout must replicate this minimum pad area - reducing pad size increases junction temperature and degrades surge endurance. The P6SMB39CAHE3/52 datasheet provides exact mounting dimensions in inches and millimeters for compliance.
Does P6SMB39CAHE3/52 meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, P6SMB39CAHE3/52 meets MSL Level 1 per J-STD-020, with unlimited floor life at ≤30 °C/60% RH. Its matte tin-plated leads are solderable per J-STD-002 and JESD22-B102, supporting peak reflow temperatures up to 260 °C. This eliminates baking requirements and dry pack storage - critical for high-volume SMT lines. The P6SMB39CAHE3/52 packaging (E3/52) uses 7" tape-and-reel compatible with standard pick-and-place feeders.
P6SMB39CAHE3/52 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- 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)
P6SMB39CAHE3/52 FAQ
1.How can I place an order for P6SMB39CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAHE3/52 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 P6SMB39CAHE3/52 reliable?
The price and inventory of P6SMB39CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAHE3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB39CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAHE3/52?
P6SMB39CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAHE3/52 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 P6SMB39CAHE3/52?
For technical support, including P6SMB39CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAHE3/52 requirements.
6.How does Aetrix verify that P6SMB39CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAHE3/52 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 P6SMB39CAHE3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB39CAHE3/52?
All P6SMB39CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAHE3/52, 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 P6SMB39CAHE3/52 part is unused and in its original packaging.
Return procedure for P6SMB39CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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