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Vishay General Semiconductor - Diodes Division P6SMB350AHM3_C/I
- Part No.:
- P6SMB350AHM3_C/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB350AHM3_C/I.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB350AHM3_C/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for high-energy surge protection on DC power rails and signal lines. It features a 350 V standoff voltage (VWM), 482 V maximum clamping voltage (VC) at 1.24 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in industrial motor drives, telecom power supplies, and automotive ECUs.
For engineers reviewing the P6SMB350AHM3_C/I datasheet, P6SMB350AHM3_C/I pinout, P6SMB350AHM3_C/I application, or P6SMB350AHM3_C/I equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, thermal derating above 25 °C, unidirectional polarity marking, and AEC-Q101 qualification status for automotive use cases.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 300 V), then rapidly avalanches below its 333–368 V breakdown range (VBR) to divert transient energy. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
The device uses a single PN junction in SMB (DO-214AA) package with cathode band marking, optimized for automated placement and reflow soldering per J-STD-020 MSL level 1. Thermal resistance is 100 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 300 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; sets upper limit for protected line operating voltage. |
| VBR (Breakdown) | 333–368 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC (Clamping) | 482 V at 1.24 A IPPM - Peak voltage seen by downstream circuit during 10/1000 μs surge; defines minimum required overvoltage margin. |
| PPPM | 600 W - Sustains 10/1000 μs transients without failure; validates robustness against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; determines max ambient temperature for full-power operation. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with proper layout. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics; suffix HM3 denotes halogen-free, RoHS-compliant, AEC-Q101 grade. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL level 1, UL 94 V-0 molding compound. Cathode marked with band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction; connected to lower-potential side of protected line | Enables unidirectional clamping only when transient polarity reverses - not used for DC forward bias in typical protection topology. |
| Cathode | Current exit during reverse avalanche; connected to higher-potential side (e.g., VIN rail) | Defines polarity-sensitive placement; must be tied to the node requiring overvoltage clamping, with anode grounded or referenced to return path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces downstream of DC/DC converters. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and body electronics where reliability under thermal cycling is mandatory. |
| MSL level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability across temperature and lifetime - essential for safety-critical systems. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and MCU inputs against inductive kickback from IGBTs and relays in variable-frequency drives. IC Role / Device Role / Timing Role: Shunt clamping element placed across DC bus or control signal lines to clamp transients to safe levels within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V microcontrollers and isolated gate drivers exposed to >1 kV switching noise. |
Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs feeding PoE injectors and base station backplanes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC distribution, coordinated with upstream MOVs and fuses. Use Value: Limits voltage excursion to <482 V during lightning-induced surges, preserving integrity of downstream DC/DC controllers rated for 500 V max input. |
| Automotive Body Control Modules | Industrial PLC I/O Modules |
Use Scenario: Protection of LIN bus transceivers and power window motor drivers against load dump and jump-start events. IC Role / Device Role / Timing Role: Unidirectional TVS mounted between VBAT and ground, triggered by 12 V/24 V system overvoltage. Use Value: Withstands 35 V load dump pulses per ISO 7637-2 while maintaining clamping below 482 V - compatible with 500 V-rated CAN/LIN interface ICs. |
Use Scenario: Field-side analog input protection in programmable logic controllers exposed to 24 V sensor wiring faults and ESD. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V supply rail feeding precision ADCs and isolation amplifiers. Use Value: Clamps fast-rising transients (<1 ns rise time) to <482 V, preventing saturation or offset drift in 24-bit sigma-delta ADCs. |
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 (300 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 150 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when board space is constrained and surge threat level is ≤2 kV/1 kA. |
| 1.5SMC350AHE3_A/H | Same VWM and PPPM (600 W), but SMC package (larger, RθJA = 75 °C/W); AEC-Q101 qualified | Higher thermal performance allows sustained operation at elevated ambient temperatures (>85 °C). | Choose for high-power industrial systems requiring extended thermal headroom and mechanical robustness. |
Compared with SMAJ350A-E3/5B, P6SMB350AHM3_C/I delivers 50 % higher surge energy handling in a compact SMB outline; versus 1.5SMC350AHE3_A/H, it trades thermal margin for smaller PCB area - ideal for space-constrained automotive modules where AEC-Q101 compliance and 600 W capability are both mandatory.
Availability
P6SMB350AHM3_C/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply with AEC-Q101 qualification and consistent surge performance.
Supply support for P6SMB350AHM3_C/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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on reliability, efficiency, and application-specific performance.
The P6SMB series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for stable clamping, low leakage, and AEC-Q101 compliance in harsh environments.
FAQ
What is the maximum clamping voltage of the P6SMB350AHM3_C/I under a 10/1000 μs surge?
The P6SMB350AHM3_C/I has a maximum clamping voltage (VC) of 482 V at 1.24 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the highest voltage imposed on protected circuitry during a defined surge event. The P6SMB350AHM3_C/I maintains this clamping performance across its specified operating temperature range.
Is the P6SMB350AHM3_C/I AEC-Q101 qualified, and what does the 'HM3' suffix indicate?
Yes, the P6SMB350AHM3_C/I is AEC-Q101 qualified. The 'HM3' suffix indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - verified per stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. This makes the P6SMB350AHM3_C/I suitable for automotive applications such as body control modules and power distribution units where reliability under thermal and mechanical stress is critical.
How does the P6SMB350AHM3_C/I differ from bidirectional TVS diodes like P6SMB350CA?
The P6SMB350AHM3_C/I is unidirectional and features a cathode band marking, enabling clamping only during reverse-biased transients - ideal for DC power rail protection. In contrast, P6SMB350CA is bidirectional and lacks polarity marking, supporting AC or dual-polarity signal line protection. The P6SMB350AHM3_C/I exhibits lower leakage at VWM and is optimized for asymmetric voltage threats, whereas the CA variant provides symmetrical clamping in both directions.
What is the thermal resistance and recommended PCB layout for optimal performance of the P6SMB350AHM3_C/I?
The P6SMB350AHM3_C/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. To achieve rated power dissipation, use minimum pad dimensions matching the SMB (DO-214AA) outline, ensure solid copper pour under the device, and avoid thermal isolation. Derating begins above TA = 25 °C per Figure 2 in the datasheet - at 75 °C ambient, maximum PPPM drops to ~420 W.
Can the P6SMB350AHM3_C/I be used in place of lower-voltage P6SMB devices like P6SMB24A in the same footprint?
No - while all P6SMB devices share the SMB (DO-214AA) package, the P6SMB350AHM3_C/I is not a drop-in replacement for lower-voltage variants due to fundamental differences in VWM, VBR, and clamping behavior. Substituting it for a 24 V device would leave downstream circuits unprotected against transients below 300 V. Selection must match the protected line's operating voltage and required clamping margin - the P6SMB350AHM3_C/I is specifically intended for 300 V DC systems.
P6SMB350AHM3_C/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:
- 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:
- -
- 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_C/I FAQ
1.How can I place an order for P6SMB350AHM3_C/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB350AHM3_C/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 P6SMB350AHM3_C/I reliable?
The price and inventory of P6SMB350AHM3_C/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB350AHM3_C/I is usually 5 days.
3.What payment methods are accepted for P6SMB350AHM3_C/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB350AHM3_C/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB350AHM3_C/I?
P6SMB350AHM3_C/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB350AHM3_C/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 P6SMB350AHM3_C/I?
For technical support, including P6SMB350AHM3_C/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB350AHM3_C/I requirements.
6.How does Aetrix verify that P6SMB350AHM3_C/I is sourced from the original manufacturer or authorized distributors?
All P6SMB350AHM3_C/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 P6SMB350AHM3_C/I meets industry standards.
7.What is the process for return or replacement of P6SMB350AHM3_C/I?
All P6SMB350AHM3_C/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB350AHM3_C/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 P6SMB350AHM3_C/I part is unused and in its original packaging.
Return procedure for P6SMB350AHM3_C/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB350AHM3_C/I Tags
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