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Vishay General Semiconductor - Diodes Division P6SMB39CAHM3_A/I
- Part No.:
- P6SMB39CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAHM3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB39CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, 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 test current, 53.9 V maximum clamping voltage (VC) at 11.1 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P6SMB39CAHM3_A/I datasheet, P6SMB39CAHM3_A/I pinout, P6SMB39CAHM3_A/I application, or P6SMB39CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMB (DO-214AA) package thermal performance, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements in harsh EMI environments.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding its VWM (33.3 V), it avalanches rapidly (<1 ns response time) to divert surge current away from downstream circuitry. Its bidirectional structure enables symmetric clamping in AC-coupled or floating signal paths without polarity sensitivity.
Thermally, it delivers 600 W peak pulse power under JEDEC-standard 10/1000 μs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads, with junction-to-ambient thermal resistance (RθJA) of 100 °C/W and maximum operating junction temperature of +150 °C - supporting reliable operation in high-temperature automotive engine bays and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33.3 V - maximum continuous reverse voltage before avalanche conduction begins; defines safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 37.1–41.0 V at IT = 1 mA - precise voltage threshold where device enters controlled avalanche; ensures repeatable clamping onset. |
| VC (Clamping Voltage) | 53.9 V at IPPM = 11.1 A - maximum voltage seen by protected circuit during 600 W transient; determines residual stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity under standardized 10/1000 μs surge waveform; validates robustness against lightning-induced surges. |
| ID (Reverse Leakage) | 1.0 μA at VWM - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max. | +150 °C - enables deployment in under-hood automotive modules and industrial enclosures without derating. |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability per stress-test standard, including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Cathode/anode terminals are unmarked for bidirectional operation; polarity is non-applicable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either polarity relative to cathode. |
| Cathode | Transient current sink (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or reference during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled lines (e.g., RS-485, CAN, audio) without polarity concerns or external rectification. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) surges when properly laid out on PCB. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including body control modules and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow compatibility with standard SMT assembly processes up to 260 °C peak. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting wheel speed sensor outputs exposed to load-dump and ISO 7637-2 pulses in chassis wiring harnesses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across differential pair inputs of analog front-end amplifier. Use Value: Limits induced transients to ≤53.9 V, preventing latch-up or damage to 3.3 V/5 V ADC input stages while maintaining <1 μA leakage at 33.3 V nominal bus voltage. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLC backplanes subjected to motor switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping device connected between A/B lines and ground to absorb common-mode surges. Use Value: Clamps 10/1000 μs surges up to 600 W without degrading signal integrity due to low capacitance (<100 pF) and symmetric VBR tolerance (±5.3%). |
| Consumer USB-C Port ESD | Telecom DSL Line Protection |
Use Scenario: Secondary-level ESD protection on USB-C CC and VCONN lines in portable docking stations. IC Role / Device Role / Timing Role: Fast-response TVS placed after primary polymer PTC fuse to handle repetitive ±8 kV IEC 61000-4-2 discharges. Use Value: Sub-1 ns response time and 53.9 V clamping ensure downstream USB PD controllers remain within absolute maximum ratings during contact discharge events. |
Use Scenario: Overvoltage protection on twisted-pair DSL subscriber lines vulnerable to lightning-induced surges in outdoor cabinets. IC Role / Device Role / Timing Role: Primary shunt protector mounted at line interface connector, upstream of transformer and line driver IC. Use Value: Withstands 10/1000 μs surges up to 600 W and maintains stable VWM (33.3 V) across -40 °C to +125 °C ambient, ensuring fail-safe operation in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same SMB package, but lower PPPM (600 W same), higher VWM (33 V vs. 33.3 V), identical VC (53.3 V), not AEC-Q101 qualified. | Targeted at commercial/industrial use only; lacks automotive reliability validation and halogen-free certification. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive traceability. |
| 1.5KE39CA | Through-hole DO-201 package, same VWM/VC specs, 1500 W PPPM, higher thermal mass, no MSL rating. | Suitable for prototyping or low-volume legacy designs where manual assembly or high-energy surges dominate. | Choose only if board space allows larger footprint and reflow compatibility is not needed; not suitable for automated SMT production. |
Compared with SMBJ33CA and 1.5KE39CA, P6SMB39CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, MSL Level 1 compatibility, and precise 33.3 V VWM - making it the preferred choice for volume automotive electronics requiring full supply-chain compliance and zero rework risk in high-speed SMT lines.
Availability
P6SMB39CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, consumer USB-C docking stations, and telecom DSL line cards requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for P6SMB39CAHM3_A/I 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The P6SMB series was engineered specifically for robust, surface-mount transient suppression in space-constrained, high-surge environments - emphasizing low clamping voltage, fast response, and automotive-grade qualification.
FAQ
What is the clamping voltage of P6SMB39CAHM3_A/I at its rated peak pulse current?
The P6SMB39CAHM3_A/I has a maximum clamping voltage (VC) of 53.9 V at its rated peak pulse current (IPPM) of 11.1 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuits will not experience voltages exceeding 53.9 V during worst-case surge events, preserving the integrity of downstream 3.3 V or 5 V logic interfaces. The P6SMB39CAHM3_A/I achieves this with low incremental surge resistance and symmetric bidirectional behavior.
Is P6SMB39CAHM3_A/I suitable for automotive applications?
Yes, P6SMB39CAHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting stringent automotive reliability requirements for under-hood and chassis-mounted electronics. Its operating junction temperature range of -65 °C to +150 °C, MSL Level 1 rating, and validated performance across temperature and humidity stress tests make it appropriate for engine control units, ADAS camera modules, and body electronics. The P6SMB39CAHM3_A/I suffix "HM3" explicitly denotes this automotive qualification.
How does the bidirectional design of P6SMB39CAHM3_A/I affect its usage in circuit protection?
The bidirectional design of P6SMB39CAHM3_A/I eliminates polarity dependence, allowing it to clamp overvoltages of either polarity across its terminals - essential for protecting AC-coupled or floating signal lines like RS-485, CAN, or audio interfaces. Unlike unidirectional TVS diodes, the P6SMB39CAHM3_A/I requires no orientation during placement and provides matched VBR and VC characteristics in both directions, simplifying layout and improving surge immunity consistency. This symmetry is confirmed in Vishay's electrical characteristics table for all CA-suffix devices.
What is the thermal resistance of P6SMB39CAHM3_A/I, and how does it impact PCB layout?
P6SMB39CAHM3_A/I 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 - a condition specified in the datasheet for thermal derating calculations. To maintain safe junction temperatures during repetitive surges, designers must replicate this pad area and ensure adequate copper pour or thermal vias beneath the SMB (DO-214AA) package. Failure to meet this layout requirement may cause premature thermal failure, especially in high-duty-cycle applications. The P6SMB39CAHM3_A/I thermal model assumes no additional heatsinking beyond the defined pad geometry.
Does P6SMB39CAHM3_A/I have any special handling or soldering requirements?
P6SMB39CAHM3_A/I is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and supports standard lead-free reflow profiles with a maximum peak temperature of 260 °C. No baking or dry-pack handling is required prior to assembly. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and whisker resistance meets JESD 201 Class 2. These attributes ensure robust manufacturability in high-volume SMT lines - a key advantage of the P6SMB39CAHM3_A/I over legacy through-hole alternatives.
P6SMB39CAHM3_A/I 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:
- Obsolete
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB39CAHM3_A/I FAQ
1.How can I place an order for P6SMB39CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAHM3_A/I 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 P6SMB39CAHM3_A/I reliable?
The price and inventory of P6SMB39CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB39CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAHM3_A/I?
P6SMB39CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAHM3_A/I 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 P6SMB39CAHM3_A/I?
For technical support, including P6SMB39CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB39CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAHM3_A/I 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 P6SMB39CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB39CAHM3_A/I?
All P6SMB39CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAHM3_A/I, 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 P6SMB39CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB39CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CAHM3_A/I Tags
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