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Vishay General Semiconductor - Diodes Division SMBJ30A-M3/52
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- Part No.:
- SMBJ30A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30A-M3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,180
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Product details
Overview
SMBJ30A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1.0 mA test current, 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 µs waveform - used for safeguarding MOSFETs, ICs, and sensor signal lines in industrial and telecom systems.
For engineers reviewing the SMBJ30A-M3/52 datasheet, SMBJ30A-M3/52 pinout, SMBJ30A-M3/52 application, or SMBJ30A-M3/52 equivalent, key selection considerations include its unidirectional polarity, halogen-free RoHS-compliant M3 suffix, 150 °C maximum junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on PCBs requiring robust ESD and surge immunity per IEC 61000-4-2/4-5.
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 33.3 V minimum breakdown threshold, limiting transient energy to safe levels across protected circuit nodes. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for protecting high-speed digital interfaces and power rails.
The SMBJ30A-M3/52 delivers 600 W peak pulse power handling under standardized 10/1000 µs surge conditions with 0.01% duty cycle, and supports repetitive surge events when thermally managed via its 100 °C/W junction-to-ambient thermal resistance. Its cathode-band marking and DO-214AA footprint align with JEDEC-standard layout practices for unidirectional TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines upper limit of normal circuit operation. |
| VBR (min/max) | 33.3 V / 36.8 V at 1.0 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage seen by protected circuit during full 600 W surge; determines maximum stress on downstream components. |
| PPPM | 600 W - Peak pulse power dissipation capability with 10/1000 µs waveform; validates compliance with IEC 61000-4-5 Level 4 surge immunity. |
| IFSM | 100 A - Peak forward surge current rating (8.3 ms half-sine); supports protection of DC power inputs subject to line-switching transients. |
| TJ max. | +150 °C - Maximum junction temperature enabling reliable operation in industrial environments with elevated ambient temperatures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" x 0.155" footprint; optimized for automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking on one end. Dimensions: 5.59 mm × 3.94 mm × 2.29 mm (L × W × H), with 1.52 mm minimum lead width and 2.18 mm minimum cathode band position.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance reference plane; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to the line being protected (e.g., 30 V rail or signal trace); conducts only during overvoltage conditions. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements up to Level 4 (4 kV line-to-earth, 2 kV line-to-line). |
| Glass passivated chip junction | Ensures stable reverse leakage (<1.0 µA at 30 V) and long-term reliability under thermal cycling and humidity exposure. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance mandates for industrial and automotive supply chains without compromising surge performance. |
| MSL Level 1 (J-STD-020), 260 °C peak reflow | Supports standard lead-free reflow profiles without moisture-related popcorning or delamination risk. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces. |
Applications
| Industrial Motor Drive Control | Telecom Power Input Protection |
|---|---|
Use Scenario: Protecting gate drivers and microcontroller I/O pins from flyback voltage spikes generated by relay or solenoid switching in PLC modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between MOSFET gate and source, or across DC bus inputs. Use Value: Limits transient voltage to ≤48.4 V during 12.4 A surges, preventing latch-up or oxide breakdown in 30 V-rated control ICs. |
Use Scenario: Safeguarding primary-side DC-DC converter inputs in base station power supplies exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Front-end transient suppression on 30 V intermediate bus before buck regulator stage. Use Value: Absorbs 600 W surge energy while maintaining <1.0 µA leakage at nominal 30 V operation, preserving efficiency and standby current. |
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
Use Scenario: Protecting LIN bus transceivers and window motor H-bridge drivers from load dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, or across motor supply terminals. Use Value: Responds in <1 ns to clamp 30 V+ transients, meeting AEC-Q101 qualification requirements when using HM3 variants. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events in factory automation IO-Link nodes. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA or 0–10 V output lines, referenced to system ground. Use Value: Maintains signal integrity with minimal loading due to low leakage (<1.0 µA) and predictable clamping at 48.4 V under 12.4 A surge. |
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-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3 suffix). | Preferred for commercial-grade designs where halogen-free material is not mandated. | Select when cost sensitivity outweighs halogen-free requirement; identical footprint and assembly process. |
| SMBJ30CA-M3/52 | Bidirectional variant with symmetric ±30 V stand-off and same clamping (48.4 V), but no polarity marking. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where bidirectional surge protection is needed. | Choose only when protecting balanced or alternating-polarity circuits; not a drop-in replacement for unidirectional use cases. |
Compared with SMBJ30A-M3/52, the E3 variant offers identical surge performance at lower material cost but lacks halogen-free certification, while the 30CA variant enables bidirectional clamping essential for differential buses - neither is pin-compatible without circuit redesign due to polarity and symmetry differences.
Availability
SMBJ30A-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and sensor interface circuits requiring stable component supply with halogen-free compliance and IEC 61000-4-5 surge immunity.
Supply support for SMBJ30A-M3/52 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, power efficiency, and application-specific performance.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for industrial, automotive, and telecom infrastructure - balancing clamping precision, surge endurance, and manufacturability.
FAQ
What is the maximum clamping voltage of the SMBJ30A-M3/52 under surge conditions?
The SMBJ30A-M3/52 has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during a full 600 W transient event, and is measured per ANSI/IEEE C62.35 standards. The SMBJ30A-M3/52 maintains this clamping performance across its specified operating temperature range.
Is the SMBJ30A-M3/52 suitable for automotive applications?
The SMBJ30A-M3/52 itself is commercial-grade and halogen-free RoHS-compliant, but not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ30A-HM3_X variant (e.g., SMBJ30A-HM3_A), which shares identical electrical specs and SMB package but adds AEC-Q101 qualification. The SMBJ30A-M3/52 is appropriate for non-safety-critical automotive subsystems where qualification is not mandated, such as infotainment power rails.
How does the M3 suffix differ from E3 in SMBJ30A-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction, whereas E3 denotes RoHS-compliant but standard brominated flame-retardant molding compound. Both share identical electrical characteristics, thermal ratings, and mechanical dimensions. The SMBJ30A-M3/52 meets stricter environmental requirements for markets like EU industrial equipment and green electronics initiatives, with no trade-off in surge performance or reliability.
What is the reverse leakage current of SMBJ30A-M3/52 at its rated stand-off voltage?
The SMBJ30A-M3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 30 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on circuits and preserves accuracy in high-impedance sensor bias networks. Leakage remains within specification up to +125 °C, per derating curves in the Vishay datasheet 88392.
Can SMBJ30A-M3/52 be used in bidirectional signal protection?
No - the SMBJ30A-M3/52 is a unidirectional TVS diode, with cathode band marking and asymmetric conduction behavior. For bidirectional protection (e.g., RS-485, USB, or AC signal lines), the SMBJ30CA-M3/52 variant must be used. Substituting SMBJ30A-M3/52 in bidirectional applications risks failure during negative-going transients, as it will not conduct below −0.7 V forward voltage and lacks symmetrical clamping.
SMBJ30A-M3/52 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):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMBJ30A-M3/52 FAQ
1.How can I place an order for SMBJ30A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30A-M3/52 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 SMBJ30A-M3/52 reliable?
The price and inventory of SMBJ30A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30A-M3/52?
SMBJ30A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30A-M3/52 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 SMBJ30A-M3/52?
For technical support, including SMBJ30A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30A-M3/52 requirements.
6.How does Aetrix verify that SMBJ30A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30A-M3/52 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 SMBJ30A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30A-M3/52?
All SMBJ30A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30A-M3/52, 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 SMBJ30A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ30A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30A-M3/52 Tags
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