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Vishay General Semiconductor - Diodes Division SMBJ30CD-M3/H
- Part No.:
- SMBJ30CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CD-M3/H.pdf
- Description:
- TVS DIODE 30VWM 47.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,109
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Product details
Overview
SMBJ30CD-M3/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power 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). It protects sensitive ICs and MOSFETs in industrial and telecom interfaces.
For engineers reviewing the SMBJ30CD-M3/H datasheet, SMBJ30CD-M3/H pinout, SMBJ30CD-M3/H application, or SMBJ30CD-M3/H equivalent, key selection criteria include bidirectional clamping capability, ±3.5% VBR tolerance, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche breakdown in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its low incremental surge resistance and fast response time ensure effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The SMBJ30CD-M3/H uses silicon planar junction technology with optimized doping and geometry to achieve tight VBR tolerance (±3.5%), stable clamping under repetitive 10/1000 μs pulses at 0.01% duty cycle, and thermal robustness up to 150 °C junction temperature. It is rated for 5.0 W power dissipation at TM = 50 °C on recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working range for protected line. |
| VBR min/max | 33.8 V / 36.3 V at 1 mA - Tight ±3.5% breakdown tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 47.7 V at 12.6 A - Clamping voltage during 600 W transient; limits stress on downstream components during surge events. |
| PPPM | 600 W (10/1000 μs) - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| ID @ VWM | <0.5 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | 150 °C - Enables reliable operation in industrial ambient environments and under sustained power dissipation. |
| RθJA | 125 °C/W (min. pad) - Thermal resistance informs PCB copper area requirements for thermal management under pulsed loads. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no cathode band. Matte tin-plated leads, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical junction; accepts surge current in either direction during overvoltage events. |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; completes bidirectional conduction path with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating power rails without polarity constraints. |
| ±3.5% VBR tolerance | Reduces design margin overhead and improves consistency in multi-channel or redundant protection schemes. |
| 600 W peak pulse rating | Supports robust immunity to IEC 61000-4-5 4 kV surge tests with minimal PCB footprint. |
| MSL Level 1 rating | Allows standard SMT reflow without baking or special handling, reducing manufacturing complexity and cost. |
| Halogen-free & RoHS | Meets global environmental compliance requirements for industrial, telecom, and consumer end equipment. |
Applications
| Industrial Sensor Interface | RS-485 Communication Line |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to motor drive noise and relay switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and return lines to clamp common-mode and differential surges before they reach ADC input or isolation barrier. Use Value: Prevents sensor output saturation or latch-up during 1 kV/μs fast transients, maintaining measurement accuracy and system uptime. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers connected to long cable runs in building control networks subject to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Placed between A/B differential pair and ground to absorb common-mode surges while preserving signal integrity up to 10 Mbps. Use Value: Limits clamping voltage to 47.7 V, keeping transceiver stress below absolute maximum ratings and avoiding bus lockup. |
| Power Supply Input Stage | Automotive Body Control Module |
Use Scenario: Secondary surge protection on 24 V DC input of programmable logic controllers after primary MOV-based front-end filtering. IC Role / Device Role / Timing Role: Fast-acting clamping device that activates within nanoseconds to limit residual transients passing through upstream filters. Use Value: Complements slower primary protectors by suppressing sub-microsecond spikes that could damage DC-DC controller ICs. |
Use Scenario: Protecting LIN bus pins and switched 12 V supply inputs in BCM modules against load dump and jump-start induced voltage spikes. IC Role / Device Role / Timing Role: Bidirectional TVS on LIN data line and unidirectional variant on power rail-SMBJ30CD-M3/H used where floating or AC-coupled nodes exist. Use Value: Withstands repeated 300 ms load dump pulses up to 35 V and clamps fast ESD events to safe levels for LIN transceiver I/O. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/52 (Vishay) | Same VWM/VBR/VC specs; differs only in packaging (tape-and-reel vs. bulk) and M3 suffix absence - not halogen-free or JESD201 Class 2 qualified. | Lacks industrial-grade reliability certifications required for automotive or harsh-environment deployments. | Select SMBJ30CD-M3/H when MSL Level 1, halogen-free, and whisker-resistant terminations are mandatory. |
| SMLJ30C (Littelfuse) | Same SMB package and bidirectional function but higher VC (50.0 V @ 12.3 A); lower IPPM (12.3 A vs. 12.6 A); same PPPM (600 W). | Higher clamping voltage may exceed safe limits for 3.3 V or 5 V logic interfaces downstream of protection. | Prefer SMBJ30CD-M3/H where tighter clamping (47.7 V) is critical to protect low-voltage interface ICs. |
Compared with SMBJ30CA-E3/52 and SMLJ30C, the SMBJ30CD-M3/H delivers verified halogen-free construction, JESD201 Class 2 whisker resistance, and the lowest clamping voltage in its class-making it optimal for high-reliability industrial and telecom designs requiring strict process and performance control.
Availability
SMBJ30CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication lines, and power supply input stages requiring stable component supply, long-term lifecycle support, and consistent surge performance across production batches.
Supply support for SMBJ30CD-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, precision, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in space-constrained surface-mount applications, targeting industrial automation, telecom infrastructure, and automotive subsystems where robustness and repeatability are essential.
FAQ
What is the polarity configuration of SMBJ30CD-M3/H?
The SMBJ30CD-M3/H is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SMBJ30D), it has no cathode band marking and is intended for AC-coupled or floating signal paths where polarity reversal may occur during surge events. This makes SMBJ30CD-M3/H ideal for protecting differential interfaces like RS-485 or CAN without requiring orientation-aware placement.
Does SMBJ30CD-M3/H meet automotive qualification standards?
The SMBJ30CD-M3/H is not AEC-Q200 qualified, but it meets industrial-grade reliability requirements including MSL Level 1 per J-STD-020, JESD201 Class 2 whisker resistance, and halogen-free RoHS compliance. While used in automotive body control modules for non-safety-critical functions (e.g., LIN bus protection), full automotive qualification requires additional testing beyond the SMBJ30CD-M3/H's published specifications. For AEC-Q200 applications, consult Vishay's automotive-grade TVS portfolio.
What is the maximum clamping voltage of SMBJ30CD-M3/H under surge conditions?
The SMBJ30CD-M3/H has a maximum clamping voltage (VC) of 47.7 V at 12.6 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential waveform. This value represents the upper bound of voltage seen by downstream circuitry during a 600 W transient event. Designers must verify that this clamping level remains below the absolute maximum ratings of protected ICs, especially in 3.3 V or 5 V systems where additional series impedance or secondary protection may be needed.
How does the M3 suffix affect SMBJ30CD-M3/H performance?
The M3 suffix on SMBJ30CD-M3/H indicates halogen-free molding compound, RoHS compliance, industrial-grade temperature rating, and matte tin-plated leads qualified to JESD201 Class 2 for whisker resistance. It does not alter electrical parameters such as VWM, VBR, or VC-but ensures long-term solder joint reliability and environmental compliance in high-reliability applications. The "/H" denotes 7″ tape-and-reel packaging with 750 units per reel.
Can SMBJ30CD-M3/H replace SMBJ30CA in existing designs?
SMBJ30CD-M3/H can replace SMBJ30CA in most functional contexts since both share identical VWM (30 V), VBR (33.8–36.3 V), and VC (47.7 V) specifications. However, SMBJ30CD-M3/H adds halogen-free construction, MSL Level 1 rating, and JESD201 Class 2 whisker resistance-critical for new designs targeting IPC-1752 or automotive Tier 1 compliance. No PCB layout change is required, but requalification per JEDEC J-STD-020 is recommended due to differing material sets.
SMBJ30CD-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ30CD-M3/H FAQ
1.How can I place an order for SMBJ30CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CD-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 SMBJ30CD-M3/H reliable?
The price and inventory of SMBJ30CD-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 SMBJ30CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ30CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CD-M3/H?
SMBJ30CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CD-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 SMBJ30CD-M3/H?
For technical support, including SMBJ30CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CD-M3/H requirements.
6.How does Aetrix verify that SMBJ30CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ30CD-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 SMBJ30CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ30CD-M3/H?
All SMBJ30CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CD-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 SMBJ30CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ30CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CD-M3/H Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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