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Vishay General Semiconductor - Diodes Division P6SMB440AHM3_D/I
- Part No.:
- P6SMB440AHM3_D/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB440AHM3_D/I.pdf
- Description:
- 600W,440V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,906
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Product details
Overview
P6SMB440AHM3_D/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 in power and signal lines. It features a 440 V standoff voltage (VWM), 462 V maximum breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and clamps transients to 602 V at 1.0 A IPPM. It is AEC-Q101 qualified and used in automotive power rail protection.
For engineers reviewing the P6SMB440AHM3_D/I datasheet, P6SMB440AHM3_D/I pinout, P6SMB440AHM3_D/I application, or P6SMB440AHM3_D/I equivalent, key selection criteria include its 440 V VWM rating, unidirectional polarity, SMB (DO-214AA) package compatibility, and AEC-Q101 qualification for automotive-grade reliability under repetitive surge stress.
Technical Context
The P6SMB440AHM3_D/I operates as a unidirectional clamping device with glass-passivated junction and low incremental surge resistance. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–65 °C to +150 °C) support operation in high-ambient environments when mounted on 5.0 mm × 5.0 mm copper pads.
It delivers 600 W peak pulse power per 10/1000 μs waveform at 0.01 % duty cycle, with fast response time and excellent clamping ratio (VC/VBR ≈ 1.30). The device meets MSL Level 1 per J-STD-020 and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 440 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 400–440 V DC bus applications. |
| VBR (Breakdown Voltage) | 418–462 V at 1.0 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 602 V at IPPM = 1.0 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for downstream IC/MOSFET survival. |
| PPPM (Peak Pulse Power) | 600 W - Sustains standardized 10/1000 μs transient energy without failure; validated at TA = 25 °C with derating above 25 °C. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and reflow soldering. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance per AEC specification. |
| Mounting Thermal Condition | 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - Required layout for rated power dissipation and thermal performance. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); weight: 0.106 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode during reverse surge. |
| Cathode | Current exit point in forward conduction; marked with band | Connected to higher-potential side (e.g., supply rail); reverse-biased during normal operation; avalanches to clamp surges. |
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 400 V systems without derating. |
| AEC-Q101 Qualified (HM3 suffix) | Validated for automotive power electronics including engine control units, battery management, and ADAS power rails. |
| Glass Passivated Junction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives; supports >1000-hour HAST reliability. |
| Low Incremental Surge Resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns rise time), enhancing protection margin for sensitive MOSFETs. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during assembly. |
Applications
| Automotive Power Rail Protection | Industrial DC Link Surge Suppression |
|---|---|
|
Use Scenario: Protecting 48 V and 400 V battery systems in EVs and HEVs against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side power rail and ground to clamp positive-going surges exceeding 440 V. Use Value: Prevents catastrophic failure of SiC MOSFETs and gate drivers by limiting transient voltage to ≤602 V during 600 W pulses. |
Use Scenario: Safeguarding rectified AC/DC outputs in industrial motor drives and UPS systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated clamping device across DC bus terminals to absorb repetitive 10/1000 μs transients without degradation. Use Value: Maintains system uptime by surviving ≥1000 surge events at 80 % of rated PPPM while retaining VWM stability. |
| Telecom Power Supply Input | Renewable Energy Inverter DC Bus |
|
Use Scenario: Front-end protection of telecom rectifiers and PoE injectors subjected to induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Primary surge limiter on +48 V input rail, coordinated with upstream MOVs and downstream filtering. Use Value: Reduces required MOV size by handling fast, high-voltage transients that bypass slower thermal devices. |
Use Scenario: DC link protection in solar string inverters where PV array transients couple into 600–1000 V DC buses. IC Role / Device Role / Timing Role: High-VWM TVS placed across DC bus capacitors to suppress switching noise and grid fault-induced spikes. Use Value: Extends capacitor lifetime by limiting voltage excursions beyond 110 % of rated bus voltage during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ440A-E3/5B | Same VWM (440 V), same SMB package, but only commercial-grade (not AEC-Q101 qualified); RθJA = 110 °C/W vs. 100 °C/W. | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC compliance is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and thermal margin allows for higher RθJA. |
| 1.5SMC440AHE3_A/H | Higher package thermal resistance (RθJA = 125 °C/W), same VWM/VC, but SMC (DO-214AB) package - 0.25 mm taller and 0.5 mm wider than SMB. | Requires PCB layout change due to larger SMC footprint; not drop-in compatible with SMB land pattern. | Choose only if existing design uses SMC footprint or requires higher single-pulse energy absorption (1500 W vs. 600 W). |
Compared with SMAJ440A-E3/5B and 1.5SMC440AHE3_A/H, the P6SMB440AHM3_D/I provides AEC-Q101 qualification and superior thermal performance in the compact SMB outline-making it the preferred choice for space-constrained, automotive-grade 400 V+ surge protection where board real estate and qualification are critical.
Availability
P6SMB440AHM3_D/I is available at Aetrix Electronics and suitable for automotive power modules, industrial DC link protection, and renewable energy inverter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB440AHM3_D/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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The P6SMB series was developed for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure-delivering consistent clamping behavior and AEC-Q101 validation across 6.8 V to 540 V ratings.
FAQ
What is the maximum clamping voltage of the P6SMB440AHM3_D/I at its rated peak pulse current?
The P6SMB440AHM3_D/I clamps to a maximum of 602 V at its specified peak pulse current (IPPM) of 1.0 A under the 10/1000 μs waveform condition. This value is measured per JEDEC standards and confirmed in the Vishay P6SMB datasheet revision 09-Jan-2024, page 2. The clamping voltage directly determines the protection margin for downstream components like MOSFETs or controllers connected to the same rail as the P6SMB440AHM3_D/I.
Is the P6SMB440AHM3_D/I suitable for automotive applications?
Yes, the P6SMB440AHM3_D/I is AEC-Q101 qualified, as indicated by the "HM3" and "D" suffixes in its part number-signifying halogen-free, RoHS-compliant construction and automotive-grade reliability testing. It is explicitly listed in Vishay's ordering table for AEC-Q101 parts covering 250 V to 540 V, making the P6SMB440AHM3_D/I appropriate for engine control units, battery management systems, and ADAS power rails where sustained surge immunity is required.
What does the "D/I" suffix mean in P6SMB440AHM3_D/I?
The "D" denotes AEC-Q101 qualification for the 250 V to 540 V voltage range, while "I" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This matches Vishay's documented ordering convention on page 3 of document 88370, where "P6SMB250AHM3_D/I" and "P6SMB440AHM3_D/I" share identical delivery mode and qualification coding. The "HM3" portion confirms halogen-free and RoHS-compliant materials.
Can the P6SMB440AHM3_D/I be used in bidirectional configurations?
No, the P6SMB440AHM3_D/I is a unidirectional TVS diode, as confirmed by its "A" suffix (per Vishay's naming convention: "A" = unidirectional, "CA" = bidirectional) and absence of "CA" in the part number. Bidirectional variants such as P6SMB440CA do exist in the same series but have different breakdown symmetry and no cathode band marking-whereas the P6SMB440AHM3_D/I uses a visible cathode band and is intended only for single-polarity surge suppression.
What is the recommended PCB pad layout for optimal thermal performance of the P6SMB440AHM3_D/I?
Vishay specifies mounting the P6SMB440AHM3_D/I on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 600 W peak pulse power and thermal resistance of 100 °C/W. This pad area is mandatory for datasheet-specified performance; reducing pad size increases junction temperature and degrades surge capability. The P6SMB440AHM3_D/I thermal derating curve (Fig. 2, page 4) assumes this layout, and deviation voids the published PPPM rating.
P6SMB440AHM3_D/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 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)
P6SMB440AHM3_D/I FAQ
1.How can I place an order for P6SMB440AHM3_D/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB440AHM3_D/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 P6SMB440AHM3_D/I reliable?
The price and inventory of P6SMB440AHM3_D/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB440AHM3_D/I is usually 5 days.
3.What payment methods are accepted for P6SMB440AHM3_D/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB440AHM3_D/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB440AHM3_D/I?
P6SMB440AHM3_D/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB440AHM3_D/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 P6SMB440AHM3_D/I?
For technical support, including P6SMB440AHM3_D/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB440AHM3_D/I requirements.
6.How does Aetrix verify that P6SMB440AHM3_D/I is sourced from the original manufacturer or authorized distributors?
All P6SMB440AHM3_D/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 P6SMB440AHM3_D/I meets industry standards.
7.What is the process for return or replacement of P6SMB440AHM3_D/I?
All P6SMB440AHM3_D/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB440AHM3_D/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 P6SMB440AHM3_D/I part is unused and in its original packaging.
Return procedure for P6SMB440AHM3_D/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB440AHM3_D/I Tags
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