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Vishay General Semiconductor - Diodes Division P6SMB350AHM3_D/H
- Part No.:
- P6SMB350AHM3_D/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB350AHM3_D/H.pdf
- Description:
- 600W,350V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB350AHM3_D/H 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 minimum breakdown voltage (VBR), and 482 V maximum 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 motor drive circuits.
For engineers reviewing the P6SMB350AHM3_D/H datasheet, P6SMB350AHM3_D/H pinout, P6SMB350AHM3_D/H application, or P6SMB350AHM3_D/H equivalent, key selection criteria include its 600 W peak pulse power rating (10/1000 μs), AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance of 100 °C/W junction-to-ambient - critical for sustained surge handling in automotive-grade power modules and telecom rectifier stages.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated silicon junction technology for stable avalanche behavior under repetitive transients. Its 10/1000 μs waveform response delivers precise voltage limiting without degradation across ≥10⁴ pulses at 0.01% duty cycle.
Designed for PCB-level transient suppression, it features low incremental surge resistance and fast response time (<1 ns), enabling effective protection of downstream MOSFETs and IGBT gate drivers against inductive switching spikes and lightning-induced surges in DC-link and auxiliary supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin for 350 V nominal systems. |
| VBR (Breakdown) | 333–368 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events above system rating. |
| VC (Clamping) | 482 V at IPPM = 1.24 A - Peak voltage seen by protected circuit during worst-case 600 W transient; determines stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; supports robust protection in high-energy surge environments like AC/DC front-ends. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in enclosed industrial enclosures or under elevated ambient conditions. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow processes. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for under-hood power electronics. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and MSL Level 1 moisture sensitivity (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when voltage exceeds VBR - must be routed with low-inductance path to earth reference. |
| Anode | Reference node | Typically tied to system ground or low-impedance return plane; forms complete clamping path during avalanche conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 300–400 V DC rails without derating. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and chassis applications requiring extended lifetime and failure-mode robustness under thermal cycling. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance; supports green manufacturing and export compliance. |
| Low RθJA (100 °C/W) | Permits sustained operation at 5.0 W power dissipation on standard PCB copper pads (5.0 mm × 5.0 mm), reducing need for heatsinking. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%) and long-term parameter stability under humidity and thermal stress - critical for field-reliability. |
Applications
| Industrial Power Supply Protection | Automotive DC-DC Converter Input |
|---|---|
|
Use Scenario: Suppresses switching transients and load-dump spikes on the 300–400 V DC output of three-phase rectifiers feeding isolated DC-DC converters. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed directly across input capacitor terminals to limit voltage overshoot during MOSFET turn-off. Use Value: Limits clamped voltage to ≤482 V, preventing overvoltage failure of primary-side controller ICs and bulk capacitors rated for 450 V DC. |
Use Scenario: Protects 24 V automotive DC-DC converter inputs from battery line transients including ISO 7637-2 Pulse 5a (load dump up to 60 V) and coupled noise. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VIN and GND to clamp surges before they reach synchronous rectifier drivers and PWM controllers. Use Value: Withstands 600 W pulses while maintaining <1 μA leakage at 300 V, ensuring no standby current penalty in always-on vehicle subsystems. |
| Telecom Rectifier Module | Motor Drive DC Link Clamp |
|
Use Scenario: Shields telecom rectifier outputs (336–384 V nominal) from lightning-induced surges entering via AC mains or backup generator interfaces. IC Role / Device Role / Timing Role: High-VWM TVS installed at rectifier output stage to absorb energy from 10/1000 μs surges without thermal runaway. Use Value: 482 V clamping voltage ensures compatibility with 400 V-rated electrolytic capacitors and SiC MOSFETs used in high-efficiency telecom PSUs. |
Use Scenario: Clamps regenerative voltage spikes on 350 V DC link buses during rapid deceleration of industrial servo motors with IGBT inverters. IC Role / Device Role / Timing Role: Unidirectional suppressor connected between DC+ and DC− rails to shunt inductive kickback energy away from bus capacitors and gate drivers. Use Value: 1.24 A IPPM rating and fast response (<1 ns) prevent voltage overshoot beyond 482 V, avoiding IGBT desaturation and overvoltage lockout. |
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 non-AEC-Q101, commercial-grade (E3), higher RθJA (125 °C/W) | Lacks automotive qualification; suitable only for industrial/commercial equipment without automotive reliability requirements | Select when cost sensitivity outweighs AEC-Q101 requirement and thermal margin allows higher junction temperature rise |
| 1.5SMC350AHE3_A/H | Same electrical specs but SMC (DO-214AB) package - larger footprint (7.11 mm × 6.22 mm), 1000 W PPPM rating | Higher power handling but requires PCB layout change; not drop-in compatible due to different pad dimensions and thermal mass | Choose when system-level surge testing exceeds 600 W and board space permits larger SMC footprint |
Compared with SMAJ350A-E3/5B, P6SMB350AHM3_D/H offers automotive-grade reliability and lower thermal resistance; versus 1.5SMC350AHE3_A/H, it trades peak power headroom for compact SMB footprint and tighter board integration - ideal where space-constrained AEC-Q101 compliance is mandatory.
Availability
P6SMB350AHM3_D/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive DC-DC converters, and telecom rectifier modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB350AHM3_D/H 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 performance.
The P6SMB Series targets high-energy transient suppression in space-constrained, high-reliability applications - engineered for automotive, industrial, and telecom systems demanding AEC-Q101 validation and consistent clamping behavior across temperature and lifetime.
FAQ
What is the clamping voltage of P6SMB350AHM3_D/H at its rated peak pulse current?
The P6SMB350AHM3_D/H has a maximum clamping voltage (VC) of 482 V at its specified peak pulse current (IPPM) of 1.24 A, measured using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-power transient event and is guaranteed across the operating temperature range of -65 °C to +150 °C. The P6SMB350AHM3_D/H maintains this clamping performance with minimal variation due to its glass-passivated junction and tight VBR tolerance.
Is P6SMB350AHM3_D/H suitable for automotive applications?
Yes, P6SMB350AHM3_D/H is AEC-Q101 qualified, as indicated by the HM3 suffix, and meets all stress tests required for automotive power electronics including temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge (ESD) per ANSI/ESDA/JEDEC JS-001. It is specifically intended for use in engine control units, body electronics, and DC-DC converters where reliability under thermal shock and vibration is mandatory. The P6SMB350AHM3_D/H also complies with halogen-free and RoHS directives required for modern vehicle platforms.
What does the "D" in P6SMB350AHM3_D/H signify?
The "D" in P6SMB350AHM3_D/H denotes the AEC-Q101 qualification grade for high-voltage variants (250 V to 540 V) within the P6SMB family, as defined in Vishay's ordering nomenclature. It distinguishes this part from lower-voltage AEC-Q101 versions marked with "B" (for 6.8 V to 220 V). The "D" suffix confirms that the P6SMB350AHM3_D/H has undergone full automotive qualification testing specific to its voltage range, and is not interchangeable with "B"-grade parts in design documentation or procurement.
How does the thermal resistance of P6SMB350AHM3_D/H affect its power handling capability?
The P6SMB350AHM3_D/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. This allows it to dissipate 5.0 W continuously at TA = 50 °C without exceeding its 150 °C maximum junction temperature. For transient events, the low RθJA ensures rapid heat dissipation during 10/1000 μs pulses, preserving clamping accuracy and preventing thermal runaway - a critical factor in high-duty-cycle industrial power applications where the P6SMB350AHM3_D/H is deployed.
Can P6SMB350AHM3_D/H replace a bidirectional TVS in an existing design?
No, P6SMB350AHM3_D/H is a unidirectional TVS diode, identifiable by its cathode band marking, and is not functionally equivalent to bidirectional devices such as P6SMB350CA. It conducts only in reverse bias and blocks forward current - making it unsuitable for AC-coupled or symmetrical surge environments. Substituting P6SMB350AHM3_D/H for a bidirectional part would leave the circuit unprotected during positive-going transients. Always verify polarity and conduction direction in the schematic before selecting the P6SMB350AHM3_D/H.
P6SMB350AHM3_D/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- 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:
- 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)
P6SMB350AHM3_D/H FAQ
1.How can I place an order for P6SMB350AHM3_D/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB350AHM3_D/H 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 P6SMB350AHM3_D/H reliable?
The price and inventory of P6SMB350AHM3_D/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB350AHM3_D/H is usually 5 days.
3.What payment methods are accepted for P6SMB350AHM3_D/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB350AHM3_D/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB350AHM3_D/H?
P6SMB350AHM3_D/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB350AHM3_D/H 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 P6SMB350AHM3_D/H?
For technical support, including P6SMB350AHM3_D/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB350AHM3_D/H requirements.
6.How does Aetrix verify that P6SMB350AHM3_D/H is sourced from the original manufacturer or authorized distributors?
All P6SMB350AHM3_D/H 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 P6SMB350AHM3_D/H meets industry standards.
7.What is the process for return or replacement of P6SMB350AHM3_D/H?
All P6SMB350AHM3_D/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB350AHM3_D/H, 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 P6SMB350AHM3_D/H part is unused and in its original packaging.
Return procedure for P6SMB350AHM3_D/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB350AHM3_D/H Tags
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