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Vishay General Semiconductor - Diodes Division SMBJ30C-E3/5B
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- Part No.:
- SMBJ30C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30C-E3/5B.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,178
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Product details
Overview
SMBJ30C-E3/5B 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), 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting MOSFETs and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ30C-E3/5B datasheet, SMBJ30C-E3/5B pinout, SMBJ30C-E3/5B application, or SMBJ30C-E3/5B equivalent, this device is selected for robust ESD and surge protection where bidirectional clamping, low leakage (<1.0 µA at VWM), and AEC-Q101 qualification readiness are required in space-constrained PCB layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 33.3 V and 36.8 V at 1.0 mA test current. Its clamping behavior is defined under standardized 10/1000 µs surge conditions, delivering consistent VC ≤ 48.4 V up to IPPM = 12.4 A.
Thermal performance is characterized by RθJA = 100 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead), supporting operation from –55 °C to +150 °C. The device uses a glass-passivated silicon junction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping begins; sets operating margin for 24 V DC systems. |
| VBR (min/max) | 33.3 V / 36.8 V - Breakdown occurs within this range at 1.0 mA; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 48.4 V - Clamped voltage seen by protected circuit during 12.4 A transient; defines worst-case stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| IPPM | 12.4 A - Maximum non-repetitive surge current it safely shunts; determines minimum series impedance needed. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off; negligible loading on high-impedance sensor or communication lines. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); MSL Level 1 (JEDEC J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; cathode-side reference in bidirectional operation | No polarity marking; symmetrical terminals enable identical clamping in either direction - no orientation dependency on PCB. |
| Cathode | Current exit terminal in forward bias; anode-side reference in bidirectional operation | Identical physical terminal to Anode; bidirectional symmetry eliminates need for polarity-aware layout or assembly verification. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, encoder outputs) without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Combination Wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) when properly decoupled. |
| Low clamping voltage (48.4 V) | Protects 3.3 V/5 V/24 V logic and analog ICs by limiting transient overvoltage well below damage thresholds. |
| UL 94 V-0 molding compound | Meets flammability safety requirements for industrial and automotive end equipment requiring certified enclosure materials. |
| RoHS-compliant, commercial grade | E3 suffix confirms lead-free, halogen-free compliance per EU RoHS Directive 2011/65/EU and JEDEC J-STD-20 reflow profile. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail inputs and signal returns to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or oxide rupture in 3.3 V microcontrollers and isolated gate drivers exposed to >100 V/µs dV/dt events. |
Use Scenario: Shielding LIN bus transceivers and door module sensors from battery dump and load-dump transients. IC Role / Device Role / Timing Role: Standoff-rated clamping element on 12 V supply rails and bidirectional data lines to suppress ±30 V surges. Use Value: Maintains communication integrity during ISO 7637-2 Pulse 5a (load dump) by limiting rail excursion to <48.4 V for ≥100 ms. |
| Industrial PLC Analog Inputs | Consumer Appliance Sensor Interfaces |
|
Use Scenario: Guarding 4–20 mA current loop receivers and thermocouple amplifier inputs against ESD and field wiring faults. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) bidirectional clamp mounted directly at connector entry point to minimize trace inductance. Use Value: Preserves 16-bit ADC accuracy by eliminating offset drift caused by sub-µA leakage paths during transient recovery. |
Use Scenario: Safeguarding touch controller I/O and hall-effect motor feedback lines in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) transient suppressor integrated into compact flex PCB assemblies near connectors. Use Value: Survives >30 kV HBM ESD events while maintaining signal integrity on high-impedance capacitive touch traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/5B | Identical electrical specs and package; CA suffix explicitly denotes bidirectional version (same as C suffix in this family). | No functional difference - "C" and "CA" are interchangeable designators per Vishay's ordering nomenclature for bidirectional SMBJ devices. | Select SMBJ30CA-E3/5B if BOM standardization requires explicit "CA" suffix; otherwise SMBJ30C-E3/5B is functionally identical. |
| SAC30C | Same VWM (30 V) and VC (48.4 V), but in SMC (DO-214AB) package - 20 % larger footprint and higher thermal mass. | Preferred where board space allows and higher IPPM margin (>15 A) or improved thermal dissipation is needed beyond SMB limits. | Choose SAC30C only when layout permits larger SMC footprint and thermal derating above 12.4 A is required; not drop-in compatible. |
Compared with SMBJ30CA-E3/5B (identical function) and SAC30C (larger SMC package), SMBJ30C-E3/5B delivers optimal space efficiency for high-density industrial PCBs while maintaining full IEC 61000-4-2/4-5 compliance at minimal cost and assembly complexity.
Availability
SMBJ30C-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and PLC analog input modules requiring stable component supply with RoHS-compliant, commercial-grade reliability.
Supply support for SMBJ30C-E3/5B 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial automation, automotive subsystems, and telecom infrastructure where repeatable clamping and long-term stability are critical.
FAQ
What is the polarity configuration of SMBJ30C-E3/5B?
SMBJ30C-E3/5B is a bidirectional TVS diode with symmetrical anode and cathode terminals - no polarity marking is applied, and it provides identical clamping in both directions. This eliminates orientation errors during automated placement and simplifies layout for AC-coupled or floating signal paths. The "C" suffix in SMBJ30C-E3/5B explicitly denotes bidirectional functionality per Vishay's naming convention.
Does SMBJ30C-E3/5B meet automotive qualification standards?
SMBJ30C-E3/5B is RoHS-compliant and commercial-grade; it is not AEC-Q101 qualified. For automotive applications, Vishay offers the HE3 variant (e.g., SMBJ30CHE3_B/I), which carries AEC-Q101 qualification. SMBJ30C-E3/5B remains suitable for non-safety-critical automotive body electronics where qualification is not mandated, but design validation must confirm system-level compliance.
What is the maximum clamping voltage of SMBJ30C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ30C-E3/5B is 48.4 V at 12.4 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuits during transient events.
Can SMBJ30C-E3/5B be used in place of a unidirectional SMBJ30A-E3/5B?
No - SMBJ30C-E3/5B is bidirectional and cannot replace unidirectional SMBJ30A-E3/5B in DC-biased applications requiring forward conduction blocking. Unidirectional types have a defined cathode band and conduct only in reverse breakdown; substituting SMBJ30C-E3/5B would allow unintended forward current flow, risking circuit malfunction. Always match polarity designation to system bias architecture.
What is the thermal resistance of SMBJ30C-E3/5B, and how does it affect layout?
SMBJ30C-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain safe operation under repetitive surges, PCB copper pads must follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) layout per terminal. Reducing pad area increases thermal impedance and risks exceeding TJ = 150 °C during sustained pulse trains.
SMBJ30C-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- 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)
SMBJ30C-E3/5B FAQ
1.How can I place an order for SMBJ30C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30C-E3/5B 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 SMBJ30C-E3/5B reliable?
The price and inventory of SMBJ30C-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ30C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30C-E3/5B?
SMBJ30C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30C-E3/5B 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 SMBJ30C-E3/5B?
For technical support, including SMBJ30C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30C-E3/5B requirements.
6.How does Aetrix verify that SMBJ30C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ30C-E3/5B 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 SMBJ30C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ30C-E3/5B?
All SMBJ30C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30C-E3/5B, 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 SMBJ30C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ30C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30C-E3/5B Tags
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