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Vishay General Semiconductor - Diodes Division P6SMB350A-M3/5B
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- Part No.:
- P6SMB350A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB350A-M3/5B.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,826
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Product details
Overview
P6SMB350A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 350 V standoff voltage (VWM), 368 V maximum breakdown voltage (VBR), and 482 V clamping voltage (VC) at 1.24 A peak pulse current (IPPM), designed to protect power rails and signal lines in high-voltage industrial power supplies and telecom rectifier stages.
For engineers reviewing the P6SMB350A-M3/5B datasheet, P6SMB350A-M3/5B pinout, P6SMB350A-M3/5B application, or P6SMB350A-M3/5B equivalent, key selection criteria include its 600 W peak pulse power rating (10/1000 μs), halogen-free RoHS-compliant M3 suffix, -65 °C to +150 °C operating junction temperature range, and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance standby to low-impedance conduction when reverse voltage exceeds VBR (333–368 V), limiting transient overvoltage to ≤482 V at 1.24 A. Its glass-passivated junction ensures stable avalanche characteristics and low leakage (<1 μA at 300 V).
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, requiring PCB copper pad area (0.2" × 0.2") per terminal for rated 600 W pulse handling. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR (Breakdown) | 333–368 V at 1 mA - Confirmed avalanche onset range under standardized test current |
| VC (Clamping) | 482 V at IPPM = 1.24 A - Peak voltage seen across protected circuit during 10/1000 μs surge |
| PPPM | 600 W - Sustained transient energy absorption capability per single 10/1000 μs pulse |
| IR (Leakage) | <1 μA at 300 V - Minimal DC loading on protected line during normal operation |
| TJ max. | +150 °C - Maximum junction temperature enabling use in enclosed, high-ambient environments |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm body length and 2.20 mm width |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and cathode band marking for unidirectional polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; defines clamping reference point for unidirectional operation |
| Cathode | High-side transient input | Marked with band; connects to protected line; conducts avalanche current into ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 300–400 V DC rails |
| Glass passivated junction | Ensures stable, repeatable avalanche behavior and <1 μA leakage at rated VWM |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and telecom equipment without compromising thermal reliability |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., inductive switch-off) |
Applications
| Industrial Power Supply Input Protection | Telecom Rectifier Stage Clamping |
|---|---|
Use Scenario: Protecting primary-side DC bus in 380 V nominal telecom rectifiers against lightning-induced surges and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between HV DC+ and chassis ground. Use Value: Limits transient voltage to ≤482 V, preventing damage to downstream MOSFETs and controllers while maintaining >300 V steady-state operation. |
Use Scenario: Safeguarding auxiliary power supply inputs in base station power modules exposed to induced transients on long cable runs. IC Role / Device Role / Timing Role: Standby clamping element on 300–400 V intermediate bus, activated only during surge events. Use Value: Provides 600 W pulse handling without derating at +85 °C ambient, supporting compact, fanless designs. |
| High-Voltage Motor Drive DC Link | Renewable Energy Inverter DC Bus |
Use Scenario: Suppressing switching spikes and regenerative energy transients on 350–400 V DC links in servo drives and VFDs. IC Role / Device Role / Timing Role: Fast-response voltage clamp parallel to bulk storage capacitors. Use Value: Clamps sub-microsecond transients with <1 ns response time, reducing stress on IGBT gate drivers and snubbers. |
Use Scenario: Protecting photovoltaic string inverters' DC input stage from grid-switching transients and nearby lightning coupling. IC Role / Device Role / Timing Role: Primary overvoltage suppression component on MPPT input, rated for continuous 300 V operation. Use Value: Maintains <1 μA leakage at 300 V, minimizing parasitic power loss in high-impedance PV monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ350A-E3/5B | Same VWM/VBR/VC ratings but lower PPPM (400 W), SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance on 300+ V rails | Select only if space-constrained and surge energy is confirmed ≤400 W |
| 1.5SMC350A | Same electrical specs but SMC (DO-214AB) package: larger body, lower RθJA (75 °C/W), higher IFSM (200 A) | Better thermal margin in high-repetition surge environments; requires larger PCB area | Prefer when sustained surge duty cycle exceeds 0.01 % or board layout allows SMC footprint |
Compared with P6SMB350A-M3/5B, SMAJ350A-E3/5B trades pulse power for compactness, while 1.5SMC350A offers superior thermal robustness at the cost of board space-making P6SMB350A-M3/5B the optimal balance of 600 W capability, SMB footprint, and halogen-free compliance.
Availability
P6SMB350A-M3/5B is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom rectifier stage clamping, high-voltage motor drive DC link protection, renewable energy inverter DC bus safeguarding, and automotive-grade auxiliary power systems requiring stable component supply and long-term lifecycle continuity.
Supply support for P6SMB350A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The P6SMB Series targets high-energy transient suppression in surface-mount power systems, emphasizing ruggedness, standardized packaging, and compliance with AEC-Q101, RoHS, and halogen-free requirements.
FAQ
What is the clamping voltage of P6SMB350A-M3/5B at its rated peak pulse current?
The P6SMB350A-M3/5B has a maximum clamping voltage (VC) of 482 V at its specified peak pulse current (IPPM) of 1.24 A under the 10/1000 μs waveform condition. This value is measured per JEDEC standards and reflects the actual voltage seen across the protected circuit during worst-case surge events. The P6SMB350A-M3/5B maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C), with minimal drift due to its stable glass-passivated junction.
Is P6SMB350A-M3/5B suitable for automotive applications?
The P6SMB350A-M3/5B itself is not AEC-Q101 qualified; it carries the commercial-grade M3 suffix (halogen-free, RoHS-compliant). For automotive use, Vishay offers the P6SMB350AHM3_D/I variant, which adds AEC-Q101 qualification and uses the D suffix for high-voltage variants (250–540 V). Engineers must select P6SMB350AHM3_D/I-not P6SMB350A-M3/5B-if automotive qualification is required. The P6SMB350A-M3/5B remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated.
What does the "/5B" suffix indicate in P6SMB350A-M3/5B?
The "/5B" suffix in P6SMB350A-M3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel, containing 3200 units per reel. This contrasts with "/52", which denotes a 7-inch reel holding 750 units. Both share identical electrical and thermal specifications. The P6SMB350A-M3/5B is optimized for high-volume SMT production lines requiring extended reel life and reduced changeover frequency, while maintaining full compatibility with standard SMB pick-and-place tooling.
How does the thermal resistance of P6SMB350A-M3/5B affect its surge handling capability?
The P6SMB350A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" copper pads per terminal. Exceeding the 600 W peak pulse rating without adequate copper area causes localized heating that degrades clamping consistency and shortens device life. Derating curves in the datasheet show >50 % power reduction above 25 °C ambient-so the P6SMB350A-M3/5B must be applied with strict attention to PCB layout to sustain full-rated surge performance.
Can P6SMB350A-M3/5B replace a bidirectional TVS in a circuit?
No-P6SMB350A-M3/5B is strictly unidirectional and features a cathode band marking; it conducts only in reverse bias and blocks forward current beyond VF ≈ 3.5 V at 50 A. Bidirectional protection requires a CA-suffixed part like P6SMB350CA-M3/5B, which lacks polarity marking and clamps symmetrically in both directions. Substituting P6SMB350A-M3/5B for a bidirectional device leaves the circuit vulnerable to positive-going transients on the anode side. Always verify polarity and directionality before replacement-the P6SMB350A-M3/5B is engineered exclusively for unidirectional DC rail protection.
P6SMB350A-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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 1.24A
- 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)
P6SMB350A-M3/5B FAQ
1.How can I place an order for P6SMB350A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB350A-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 P6SMB350A-M3/5B reliable?
The price and inventory of P6SMB350A-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 P6SMB350A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB350A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB350A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB350A-M3/5B?
P6SMB350A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB350A-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 P6SMB350A-M3/5B?
For technical support, including P6SMB350A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB350A-M3/5B requirements.
6.How does Aetrix verify that P6SMB350A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB350A-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 P6SMB350A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB350A-M3/5B?
All P6SMB350A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB350A-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 P6SMB350A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB350A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB350A-M3/5B Tags
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Diodes Incorporated
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