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Vishay General Semiconductor - Diodes Division P6SMB39A-M3/5B
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- Part No.:
- P6SMB39A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39A-M3/5B.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,858
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Product details
Overview
P6SMB39A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal 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, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive ECUs.
For engineers reviewing the P6SMB39A-M3/5B datasheet, P6SMB39A-M3/5B pinout, P6SMB39A-M3/5B application, or P6SMB39A-M3/5B equivalent, key selection criteria include unidirectional polarity, SMB package thermal resistance (RθJA = 100 °C/W), clamping performance under repetitive surge conditions, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1 μA at VWM), while the low incremental surge resistance enables rapid energy diversion during ESD or inductive switching events.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operation from –65 °C to +150 °C junction temperature, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-reliability automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 53.9 V at 11.1 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case transient; critical for downstream component voltage rating. |
| PPPM | 600 W - Peak pulse power handling capability; determines survivability against lightning-induced surges or load dump spikes. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; sets upper limit for thermal design in enclosed or high-power environments. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline with 5.59 mm length and 3.94 mm width; compatible with standard pick-and-place and reflow processes. |
Pinout & Package
Package: SMB (DO-214AA), unidirectional configuration with cathode band marking on one end. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; establishes polarity-dependent clamping behavior. |
| Cathode | Avalanche conduction terminal / Clamping node | Connected to higher-potential side (e.g., VBUS or signal line); conducts surge current to ground when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/42 Ω) without degradation across 0.01 % duty cycle. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream components - e.g., keeps 3.3 V or 5 V logic rails within safe operating area during transients. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising surge performance. |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-bake requirement for PCB assembly, reducing manufacturing cost and cycle time in high-volume SMT lines. |
| 150 °C maximum junction temperature | Supports operation in under-hood automotive modules or sealed industrial enclosures where ambient temperatures exceed 85 °C. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp spikes up to ±35 V, limiting voltage seen by MCU power input. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V regulators and CAN transceivers during engine cranking or alternator field decay. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast transients (<1 ns rise time) before reaching precision ADC front-end. Use Value: Maintains signal integrity and measurement accuracy by limiting induced voltage to <55 V, well below op-amp absolute maximum ratings. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter, sized to absorb 600 W pulses per IEEE 802.3bt requirements. Use Value: Ensures system-level compliance with IEC 61000-4-5 Ed. 3, enabling certification without additional staged protection. |
Use Scenario: Adding secondary overvoltage protection to USB VBUS lines in portable chargers and docking stations exposed to hot-plug and adapter faults. IC Role / Device Role / Timing Role: Fast-response TVS placed after primary fuse to suppress 30 kV HBM ESD events before reaching USB controller IC. Use Value: Reduces failure rate in field deployments by preventing gate oxide rupture in USB switch FETs during user-handling events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5B | Same SMB package, but lower PPPM (400 W), higher VWM (33 V), and VC = 53.3 V at 7.5 A. | Less robust for high-energy surges (e.g., automotive load dump); suitable only for consumer-grade ESD-only scenarios. | Select P6SMB39A-M3/5B when 600 W surge immunity and tighter VBR tolerance (±5 % vs. ±6 %) are required. |
| 1.5SMC33A | Higher-power SMC package (1500 W), same VWM/VC specs, but 7.1 mm × 6.2 mm footprint vs. SMB's 4.6 mm × 3.9 mm. | Requires PCB layout change; better for high-reliability industrial power supplies where space allows larger package. | Choose P6SMB39A-M3/5B when board space is constrained and 600 W suffices - avoids redesign cost and maintains SMT compatibility. |
Compared with SMAJ33A-E3/5B, P6SMB39A-M3/5B delivers 50 % higher peak pulse power and tighter VBR control, making it preferable for automotive and industrial surge standards; versus 1.5SMC33A, it trades power headroom for compactness and lower thermal mass - ideal for dense layouts where 600 W meets IEC 61000-4-5 Level 3 requirements.
Availability
P6SMB39A-M3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power inputs, and consumer USB power delivery systems requiring stable component supply with halogen-free compliance and AEC-Q101-qualified variants available upon request.
Supply support for P6SMB39A-M3/5B 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, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in space-constrained SMT designs, with focus on automotive, industrial, and telecom applications demanding consistent clamping performance and long-term stability under thermal cycling.
FAQ
What is the maximum clamping voltage of P6SMB39A-M3/5B under a 10/1000 μs surge?
The maximum clamping voltage (VC) of P6SMB39A-M3/5B is 53.9 V when subjected to a 10/1000 μs waveform at 11.1 A peak pulse current. This value is measured per JEDEC standards and reflects the actual voltage imposed on protected circuitry during worst-case transient events - a critical parameter for ensuring downstream components like 3.3 V MCUs or 5 V LDOs remain within their absolute maximum ratings. The P6SMB39A-M3/5B achieves this with low incremental surge resistance and tight VBR distribution.
Is P6SMB39A-M3/5B suitable for automotive applications?
Yes, P6SMB39A-M3/5B is suitable for automotive applications as a unidirectional TVS diode, especially in non-safety-critical subsystems such as body control modules and infotainment power rails. While the base P6SMB39A-M3/5B is commercial-grade, Vishay offers AEC-Q101 qualified versions (e.g., P6SMB39AHM3_B/5B) with identical electrical specs and enhanced reliability testing. The P6SMB39A-M3/5B itself meets MSL Level 1 and operates up to +150 °C junction temperature - key prerequisites for under-dash and engine bay environments.
What does the "M3" suffix indicate in P6SMB39A-M3/5B?
The "M3" suffix in P6SMB39A-M3/5B denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that satisfy JESD22-B102 whisker resistance Class 2 and J-STD-002 solderability. It distinguishes the part from the "E3" variant (RoHS-compliant but not halogen-free) and confirms compliance with environmental regulations including EU RoHS Directive 2011/65/EU Annex II. This makes P6SMB39A-M3/5B appropriate for export-controlled and green-electronics programs where brominated flame retardants are prohibited.
How does P6SMB39A-M3/5B compare to bidirectional TVS diodes like P6SMB39CA-M3/5B?
P6SMB39A-M3/5B is unidirectional and intended for DC line protection where polarity is fixed (e.g., VBUS to GND), offering lower leakage (<1 μA at 33.3 V) and slightly tighter VBR tolerance. In contrast, P6SMB39CA-M3/5B is bidirectional, supporting AC or floating signal lines (e.g., RS-485), but exhibits higher reverse leakage and symmetric clamping in both directions. Engineers select P6SMB39A-M3/5B when protecting polarized power rails - its cathode-band marking simplifies orientation during placement, and its performance is optimized for single-polarity surge suppression.
What is the thermal resistance of P6SMB39A-M3/5B, and how does it affect layout?
The typical junction-to-ambient thermal resistance (RθJA) of P6SMB39A-M3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in the Vishay datasheet. This value directly impacts PCB layout: reducing pad size or omitting thermal vias increases RθJA, causing higher junction temperature during repetitive surges. To maintain reliability, designers must allocate minimum recommended copper area and consider thermal relief patterns. The P6SMB39A-M3/5B's RθJA enables operation up to +125 °C ambient if derated per Figure 2 in the datasheet, supporting use in thermally demanding enclosures.
P6SMB39A-M3/5B 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:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB39A-M3/5B FAQ
1.How can I place an order for P6SMB39A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39A-M3/5B 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 P6SMB39A-M3/5B reliable?
The price and inventory of P6SMB39A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB39A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39A-M3/5B?
P6SMB39A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39A-M3/5B 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 P6SMB39A-M3/5B?
For technical support, including P6SMB39A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39A-M3/5B requirements.
6.How does Aetrix verify that P6SMB39A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB39A-M3/5B 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 P6SMB39A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB39A-M3/5B?
All P6SMB39A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39A-M3/5B, 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 P6SMB39A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB39A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39A-M3/5B Tags
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