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Vishay General Semiconductor - Diodes Division P6SMB440A-M3/5B
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- Part No.:
- P6SMB440A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB440A-M3/5B.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,400
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Product details
Overview
P6SMB440A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, rated for 440 V standoff voltage (VWM), 462 V maximum breakdown voltage (VBR), and 600 W peak pulse power (10/1000 μs). It clamps transients to 602 V at 1 A peak pulse current and is halogen-free, RoHS-compliant, and qualified per JESD201 Class 2 whisker test - deployed for overvoltage protection of high-voltage DC rails in industrial power supplies and telecom rectifier modules.
For engineers reviewing the P6SMB440A-M3/5B datasheet, P6SMB440A-M3/5B pinout, P6SMB440A-M3/5B application, or P6SMB440A-M3/5B equivalent, key selection criteria include its 440 V stand-off rating, 602 V clamping voltage at 1 A, 100 °C/W junction-to-ambient thermal resistance, unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
The P6SMB440A-M3/5B operates as a unidirectional avalanche diode, leveraging glass-passivated silicon junction technology to deliver fast response (<1 ns) and low incremental surge resistance. Its clamping behavior follows standardized 10/1000 μs waveform testing per REA definitions, with derating applied above TA = 25 °C per Figure 2.
Designed for high-voltage transient suppression, it sustains repetitive 600 W pulses at 0.01 % duty cycle and handles non-repetitive 100 A forward surge (8.3 ms half-sine) - requiring no external bias and functioning solely in reverse-biased conduction during overvoltage events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 440 V - Maximum continuous reverse voltage before clamping begins; defines operating margin for 400–440 V DC systems. |
| VBR (Breakdown) | 418–462 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering within ±5 % tolerance. |
| VC (Clamping) | 602 V at IPPM = 1 A - Peak voltage seen by protected circuit during full-rated transient; limits stress on downstream 600 V-rated MOSFETs or capacitors. |
| PPPM | 600 W (10/1000 μs) - Sustained transient energy handling capacity; supports protection against lightning-induced surges per IEC 61000-4-5 Level 3. |
| IPPM | 1.0 A - Peak pulse current corresponding to 602 V clamping; used to size series impedance for coordination with upstream fuses or PTCs. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in enclosed industrial enclosures up to 105 °C ambient with appropriate PCB copper area. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on minimum pad layout; requires ≥5.0 mm × 5.0 mm copper per terminal for full power rating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by black band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; carries surge current during clamping event. |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., +440 V rail); initiates avalanche conduction when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 combination wave surges without derating in standard PCB layouts. |
| Glass passivated chip junction | Ensures stable leakage performance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow soldering without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualified option available (_B suffix) | Validated for automotive-grade reliability; P6SMB440A-M3/5B itself is commercial-grade but shares identical die and construction. |
| Low profile SMB footprint | 0.220" × 0.130" outline fits high-density power converter layouts while maintaining creepage for >440 V isolation. |
Applications
| Industrial Power Supply Input Protection | Telecom Rectifier Module Clamping |
|---|---|
|
Use Scenario: Protecting primary-side DC bus in 400 V industrial SMPS against load dump and switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across bulk capacitor input to clamp overvoltage spikes before they reach controller ICs or MOSFETs. Use Value: Limits transient voltage to 602 V, preserving 600 V-rated electrolytic capacitors and SiC MOSFETs without requiring active crowbar circuits. |
Use Scenario: Safeguarding output stage of -48 V telecom rectifiers during hot-swap events and relay bounce. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between output rail and chassis ground to absorb inductive kickback from distribution relays. Use Value: Responds in <1 ns to suppress 100 V/μs transients, preventing latch-up in PMBus controllers and protecting isolated feedback optocouplers. |
| High-Voltage Sensor Interface Protection | Renewable Energy DC Link Monitoring |
|
Use Scenario: Shielding precision voltage dividers and isolation amplifiers measuring 300–500 V battery strings in EV charging stations. IC Role / Device Role / Timing Role: Front-end TVS shunting transient energy away from high-impedance sense nodes before signal conditioning stages. Use Value: Maintains <1 μA leakage at 440 V, avoiding measurement offset drift while clamping ESD events to safe levels for 16-bit ADCs. |
Use Scenario: Overvoltage clamping on photovoltaic string combiner box DC links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS array suppressing common-mode transients induced on long outdoor cable runs. Use Value: Withstands 600 W pulses at 0.01 % duty cycle, enabling compliance with UL 1741 SA rapid shutdown requirements without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440A-T | Same VWM/VC, but rated for 600 W with 1.5 kW peak (non-repetitive); higher IFSM (150 A vs. 100 A). | Better suited for infrequent, high-energy surges (e.g., direct lightning coupling); less optimized for repetitive industrial switching noise. | Select SMBJ440A-T if system-level testing reveals need for higher single-pulse margin beyond 600 W baseline. |
| 1.5SMC440A | Larger SMC (DO-214AB) package; identical electrical specs but 130 °C/W RθJA; 1.5 kW peak power rating. | Requires larger PCB area; lower thermal efficiency on same copper pad; preferred where board space allows and higher surge margin is mandatory. | Choose 1.5SMC440A only when existing layout accommodates SMC footprint and thermal modeling confirms adequate derating. |
Compared with SMBJ440A-T and 1.5SMC440A, the P6SMB440A-M3/5B delivers optimal balance of compact SMB footprint, 100 °C/W thermal performance on minimal copper, and verified 600 W repetitive capability - making it the preferred choice for space-constrained, high-volume industrial power designs requiring consistent surge immunity.
Availability
P6SMB440A-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, high-voltage sensor interfaces, and renewable energy DC link monitoring requiring stable component supply and halogen-free compliance.
Supply support for P6SMB440A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power handling, and automotive qualification.
The P6SMB Series targets high-voltage transient suppression in commercial and industrial environments, designed to replace older axial-leaded TVS devices with surface-mount scalability, automated assembly readiness, and consistent clamping performance across 6.8 V to 540 V ratings.
FAQ
What is the maximum clamping voltage of the P6SMB440A-M3/5B at its rated peak pulse current?
The P6SMB440A-M3/5B clamps to a maximum of 602 V at its specified peak pulse current of 1.0 A (10/1000 μs waveform). This value is measured under standardized test conditions with the device mounted on 0.2" × 0.2" copper pads per the Vishay datasheet, and represents the upper limit of voltage imposed on the protected circuit during full-rated transient events. The P6SMB440A-M3/5B maintains this clamping performance across its operational temperature range and is validated for repetitive 600 W pulse handling.
Is the P6SMB440A-M3/5B suitable for automotive applications?
The P6SMB440A-M3/5B is a commercial-grade, halogen-free, RoHS-compliant part and is not AEC-Q101 qualified. However, Vishay offers the functionally identical P6SMB440AHE3_B variant (with _B suffix) that is AEC-Q101 qualified for automotive use. Engineers selecting the P6SMB440A-M3/5B for automotive-adjacent systems must perform full qualification per their internal reliability requirements, as the P6SMB440A-M3/5B itself lacks automotive-specific stress testing documentation.
What is the thermal resistance and recommended PCB layout for the P6SMB440A-M3/5B?
The P6SMB440A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper areas per terminal. To achieve full 600 W pulse rating, these pads must be implemented on the outer layer with no thermal relief; internal copper planes are not required but improve margin. The P6SMB440A-M3/5B's SMB package supports standard reflow profiles including lead-free peak temperatures up to 260 °C (MSL Level 1).
How does the P6SMB440A-M3/5B differ from bidirectional TVS diodes like P6SMB440CA?
The P6SMB440A-M3/5B is unidirectional and features a cathode band marking; it conducts only during reverse overvoltage events and blocks forward current like a standard diode. In contrast, P6SMB440CA is bidirectional with no polarity marking and clamps transients of either polarity - making it suitable for AC lines or differential signal protection. The P6SMB440A-M3/5B's unidirectional design yields lower leakage (<1 μA at 440 V) and avoids ambiguity in DC rail placement, unlike bidirectional variants which exhibit symmetrical leakage in both directions.
What is the surge current rating and test condition for the P6SMB440A-M3/5B?
The P6SMB440A-M3/5B is rated for a non-repetitive peak forward surge current (IFSM) of 100 A under an 8.3 ms single half-sine waveform - applicable only to unidirectional types. This rating validates robustness against short-duration inrush or fault currents in DC systems. The device also supports repetitive 600 W pulses at 0.01 % duty cycle using the 10/1000 μs waveform, with peak pulse current (IPPM) scaling inversely with clamping voltage per the datasheet table - e.g., 1.0 A at 602 V.
P6SMB440A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Cut Tape (CT)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB440A-M3/5B FAQ
1.How can I place an order for P6SMB440A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB440A-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 P6SMB440A-M3/5B reliable?
The price and inventory of P6SMB440A-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 P6SMB440A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB440A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB440A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB440A-M3/5B?
P6SMB440A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB440A-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 P6SMB440A-M3/5B?
For technical support, including P6SMB440A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB440A-M3/5B requirements.
6.How does Aetrix verify that P6SMB440A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB440A-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 P6SMB440A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB440A-M3/5B?
All P6SMB440A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB440A-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 P6SMB440A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB440A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB440A-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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