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Vishay General Semiconductor - Diodes Division SMBJ30D-M3/H
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- Part No.:
- SMBJ30D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30D-M3/H.pdf
- Description:
- TVS DIODE 30VWM 47.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,971
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Product details
Overview
SMBJ30D-M3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 30 V stand-off voltage (VWM), 33.8–36.3 V breakdown voltage (VBR) at 1 mA, 47.7 V maximum clamping voltage (VC) at 12.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform), commonly deployed to protect MOSFETs and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ30D-M3/H datasheet, SMBJ30D-M3/H pinout, SMBJ30D-M3/H application, or SMBJ30D-M3/H equivalent, key selection criteria include its unidirectional polarity, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), M3 halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 30 V and rapidly transitions to low-impedance conduction above its 33.8–36.3 V breakdown threshold, limiting transient energy to safe levels. Its 10/1000 μs surge rating supports repetitive 0.01 % duty cycle events, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature.
The SMBJ30D-M3/H exhibits 125 °C/W junction-to-ambient thermal resistance on standard pads and 20 °C/W junction-to-mount resistance, enabling effective heat dissipation during transient suppression. Its 150 °C maximum junction temperature and -55 °C to +150 °C operating range support deployment in harsh industrial environments without derating penalties up to 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR min/max | 33.8 V / 36.3 V - Breakdown occurs within this tight ±3.5 % tolerance band at 1 mA test current |
| VC @ IPPM | 47.7 V - Clamped voltage across device when subjected to 12.6 A 10/1000 μs surge |
| PPPM | 600 W - Peak transient power handling capability under standardized 10/1000 μs waveform |
| ID @ VWM | <0.5 μA - Extremely low reverse leakage ensures minimal standby power loss |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.20 mm × 4.57 mm footprint and 2.44 mm height |
| TJ max | +150 °C - Enables reliable operation in high-temperature industrial enclosures and power converters |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards; M3 suffix indicates halogen-free, RoHS-compliant, industrial-grade construction meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; defines forward conduction direction |
| Cathode (banded end) | High-side transient clamp node | Connected to protected line; absorbs positive-going surges by avalanche conduction to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise clamping thresholds across production lots, reducing design margin uncertainty |
| 600 W 10/1000 μs rating | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) in single-device configurations |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement without baking, simplifying SMT manufacturing flow |
| <0.5 μA ID at VWM | Minimizes quiescent current draw in battery-powered or low-power sensor nodes |
| Halogen-free M3 construction | Meets IPC-1752A environmental compliance requirements for industrial and automotive supply chains |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source to clamp negative transients and prevent gate oxide rupture. Use Value: 47.7 V clamping voltage ensures gate-source voltage stays within ±20 V absolute maximum rating of common logic-level MOSFETs. | Use Scenario: Shielding LIN bus transceivers and sensor inputs from load dump and jump-start induced spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line to absorb 100 V/50 ms load dump energy while maintaining signal integrity below 30 V. Use Value: Tight 33.8–36.3 V VBR allows reliable detection of valid LIN recessive states while blocking damaging overvoltage events. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
Use Scenario: Input-stage surge protection for AC/DC adapters and DC/DC converters exposed to lightning-induced surges on mains-connected equipment. IC Role / Device Role / Timing Role: Primary clamping device across bulk capacitor input rails to limit transient voltage before downstream regulators. Use Value: 600 W peak power rating enables single-device compliance with IEC 61000-4-5 surge immunity requirements for Class II equipment. | Use Scenario: ESD and switching transient protection for microcontroller GPIOs connected to pushbuttons, displays, and relay coils in white goods. IC Role / Device Role / Timing Role: Localized TVS on each user-interface signal line to shunt fast transients before they propagate into MCU pins. Use Value: Low 0.5 μA leakage prevents false wake-up events in sleep-mode appliances, extending battery backup runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A-M3/H | Bidirectional variant with same VWM (30 V), but symmetric clamping in both polarities; VBR min/max = 33.8–36.3 V in either direction | Required where AC-coupled or differential signal lines need protection against both positive and negative transients | Select SMBJ30A-M3/H only if bidirectional clamping is required; SMBJ30D-M3/H is optimal for DC-biased rails with defined polarity |
| SMCJ30A | Larger SMC (DO-214AB) package with higher 1500 W PPPM rating; same VWM/VBR but higher VC (48.4 V) and IPPM (31.8 A) | Used where higher surge energy absorption is needed, such as primary-side AC input protection or high-power motor drives | Choose SMCJ30A when system-level surge testing exceeds 600 W; SMBJ30D-M3/H fits space-constrained secondary-side locations |
Compared with SMBJ30A-M3/H and SMCJ30A, the SMBJ30D-M3/H provides optimized unidirectional clamping in the smallest standard SMB footprint, delivering precise 30 V standoff and 47.7 V clamping for cost-sensitive, space-limited DC rail protection without over-engineering surge capacity.
Availability
SMBJ30D-M3/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and consumer appliance control boards requiring stable component supply and long-term manufacturability.
Supply support for SMBJ30D-M3/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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMBJ series was engineered for high-reliability transient suppression in space-constrained surface-mount applications, targeting industrial automation, automotive subsystems, and power conversion where precise clamping and MSL Level 1 assembly compatibility are critical.
FAQ
What is the clamping voltage of SMBJ30D-M3/H at its rated peak pulse current?
The SMBJ30D-M3/H has a maximum clamping voltage (VC) of 47.7 V when subjected to its rated 12.6 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit sees no more than 47.7 V during a full-power transient event, making SMBJ30D-M3/H suitable for safeguarding 3.3 V, 5 V, and 24 V logic and power rails.
Is SMBJ30D-M3/H RoHS-compliant and halogen-free?
Yes, SMBJ30D-M3/H carries the M3 suffix, which certifies it as halogen-free, RoHS-compliant, and industrial-grade per Vishay's material categorization standard. The device uses UL 94 V-0 molding compound and matte tin-plated leads qualified to J-STD-002 and JESD 22-B102, ensuring environmental compliance and solderability in lead-free reflow processes.
How does the unidirectional polarity of SMBJ30D-M3/H affect its circuit placement?
The unidirectional polarity of SMBJ30D-M3/H requires correct orientation: the banded cathode must connect to the line being protected, while the anode connects to ground or the lower-potential reference. This configuration allows SMBJ30D-M3/H to conduct only during positive transients, preventing unintended conduction during normal reverse-biased operation-critical for DC power rail and signal line protection.
What is the thermal resistance of SMBJ30D-M3/H on standard PCB pads?
SMBJ30D-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended pad layout, and 100 °C/W on a 5.0 mm × 5.0 mm copper pad. These values define steady-state power dissipation limits: at 25 °C ambient, SMBJ30D-M3/H supports 1.0 W continuous power, dropping linearly to zero at 150 °C junction temperature.
Can SMBJ30D-M3/H be used in place of a bidirectional TVS like SMBJ30CD?
No-SMBJ30D-M3/H is unidirectional and cannot replace bidirectional devices like SMBJ30CD in AC or differential signal applications. Attempting substitution risks failure during negative transients, as SMBJ30D-M3/H blocks conduction in reverse bias beyond its 30 V standoff. Use SMBJ30D-M3/H only on DC lines with known polarity; for bidirectional protection, select SMBJ30A-M3/H or SMBJ30CD variants explicitly rated for dual-polarity clamping.
SMBJ30D-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.8V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ30D-M3/H FAQ
1.How can I place an order for SMBJ30D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30D-M3/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 SMBJ30D-M3/H reliable?
The price and inventory of SMBJ30D-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ30D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30D-M3/H?
SMBJ30D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30D-M3/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 SMBJ30D-M3/H?
For technical support, including SMBJ30D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30D-M3/H requirements.
6.How does Aetrix verify that SMBJ30D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ30D-M3/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 SMBJ30D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ30D-M3/H?
All SMBJ30D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30D-M3/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 SMBJ30D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ30D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30D-M3/H Tags
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