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Vishay General Semiconductor - Diodes Division SMB8J30C-E3/5B
- Part No.:
- SMB8J30C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30C-E3/5B.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,229
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Product details
Overview
SMB8J30C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for robust overvoltage protection on signal and power lines. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V clamping voltage (VC) at 16.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform. Used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J30C-E3/5B datasheet, SMB8J30C-E3/5B pinout, SMB8J30C-E3/5B application, or SMB8J30C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.61), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5% typical) and low leakage (<1.0 µA at VWM), critical for high-impedance sensor inputs.
The device complies with ANSI/IEEE C62.35 surge standards and delivers 800 W peak pulse power under 10/1000 µs transients while maintaining thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuitry. |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown threshold ensuring predictable turn-on during transients. |
| VC @ IPPM | 48.4 V at 16.5 A - Clamped voltage seen by downstream ICs during worst-case 800 W surge; limits stress on 3.3 V/5 V logic rails. |
| PPPM | 800 W - Peak transient energy absorption capacity with 10/1000 µs waveform; validates suitability for ISO 7637-2 Pulse 1/2/5a automotive tests. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity in high-impedance analog front-ends and sensor bias networks. |
| TJ max | 150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band absent per bi-directional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; enables single-device protection of AC or differential lines. |
| Case (body) | Thermal and mechanical interface | Exposed metal slug provides primary heat dissipation path; requires minimum 5.0 mm × 5.0 mm copper pad per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Protects AC-coupled interfaces (e.g., RS-485, CAN, audio) without external polarity management or dual-diode arrangements. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control units, ADAS sensors, and body electronics. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh industrial environments. |
| MSL Level 1 (260 °C) | Supports lead-free reflow without popcorn effect or delamination; eliminates pre-bake requirements in high-volume SMT lines. |
| RoHS-compliant matte tin leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD201 Class 1A, critical for medical and telecom deployments. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensor outputs from load dump and inductive switching spikes in vehicle cabins. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector entry point to clamp ±100 V transients before reaching ASIC input pins. Use Value: Limits clamped voltage to 48.4 V, safeguarding 5 V tolerant sensor interface ICs while meeting ISO 16750-2 test requirements. |
Use Scenario: Shielding PLC analog input channels (4–20 mA, 0–10 V) from ESD and field wiring surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal line between terminal block and precision ADC front-end. Use Value: Sub-1 µA leakage at 30 V prevents measurement error in high-resolution 24-bit systems; 800 W rating handles 2 kV EFT bursts. |
| Telecom Line Interface | Consumer USB Port Protection |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors against lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), absorbing residual energy post-GDT crowbar action. Use Value: 48.4 V clamping ensures Ethernet MAC/PHY ICs (typically 3.3 V I/O) remain within absolute maximum ratings during combined surge events. |
Use Scenario: Preventing ESD damage to USB 2.0 data lines (D+/D−) and VBUS during hot-plug insertion in portable devices. IC Role / Device Role / Timing Role: Bi-directional TVS placed adjacent to USB connector to shunt ±15 kV contact ESD per IEC 61000-4-2. Use Value: 16.5 A IPPM and 48.4 V VC ensure full ESD energy dissipation without latch-up or degradation of signal integrity at 480 Mbps. |
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-E3/5B | Same DO-214AA package and 30 V VWM, but rated for 600 W PPPM (vs. 800 W) and higher VC (53.3 V at 13.3 A). | Lower power handling limits use in high-energy automotive load-dump scenarios; suitable for lower-tier industrial controls. | Select when cost sensitivity outweighs need for highest surge margin; verify clamping voltage compliance with downstream IC VIOMAX. |
| SMCJ30CA | DO-214AB (SMC) package, larger footprint (7.11 mm × 6.22 mm), 800 W PPPM, same 30 V VWM and 48.4 V VC, but higher thermal mass. | Requires PCB redesign due to larger pad layout; preferred where sustained surge duty cycles demand superior thermal dissipation. | Choose for applications with repetitive surges (e.g., motor drive feedback loops) where junction temperature rise must be minimized. |
Compared with SMBJ30CA-E3/5B and SMCJ30CA, SMB8J30C-E3/5B uniquely balances 800 W surge capacity in the compact DO-214AA footprint with AEC-Q101 qualification-enabling automotive-grade protection without board space penalty or thermal derating.
Availability
SMB8J30C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply and full traceability.
Supply support for SMB8J30C-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and performance in harsh environments.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-qualified transient suppression in automotive and industrial systems where space, thermal, and reliability constraints are critical.
FAQ
What is the clamping voltage of SMB8J30C-E3/5B at its rated peak pulse current?
The SMB8J30C-E3/5B exhibits a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 16.5 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream 3.3 V or 5 V ICs remain within absolute maximum voltage ratings during surge events. The SMB8J30C-E3/5B achieves this with a clamping ratio (VC/VWM) of 1.61, indicating efficient transient energy diversion.
Is SMB8J30C-E3/5B suitable for automotive applications?
Yes, SMB8J30C-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control modules, ADAS sensor interfaces, and body electronics. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin terminations-all validated per JESD47. The SMB8J30C-E3/5B meets ISO 7637-2 and ISO 16750-2 surge test requirements when mounted per recommended 5.0 mm × 5.0 mm copper pads.
How does SMB8J30C-E3/5B differ from uni-directional variants like SMB10J30A?
The SMB8J30C-E3/5B is bi-directional with symmetrical clamping behavior on both polarities and no cathode marking, whereas SMB10J30A is uni-directional with a visible cathode band and forward conduction capability. SMB8J30C-E3/5B has a lower peak pulse power rating (800 W vs. 1000 W) and higher IPPM (16.5 A vs. 20.7 A) at the same VWM, reflecting optimized bidirectional surge handling. The SMB8J30C-E3/5B also lacks IFSM rating since it does not conduct DC forward current.
What is the thermal resistance of SMB8J30C-E3/5B, and how does it affect layout?
The SMB8J30C-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values require adherence to the datasheet-recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal to achieve rated power dissipation. Reducing pad area increases RθJA, causing premature thermal shutdown during repetitive surges; the SMB8J30C-E3/5B's performance is strictly contingent on this layout.
Does SMB8J30C-E3/5B have a specified junction capacitance?
No, the official Vishay datasheet for SMB8J30C-E3/5B (Document Number 88422) does not specify junction capacitance (CJ). While Figure 4 shows typical CJ curves for the SMB8J family versus reverse bias voltage, no discrete value is provided for the 30 V variant. For high-speed data line protection (e.g., USB, HDMI), designers should consult Vishay's application notes or characterize CJ empirically, as the SMB8J30C-E3/5B is not optimized for ultra-low-capacitance applications.
SMB8J30C-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):
- 15A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J30C-E3/5B FAQ
1.How can I place an order for SMB8J30C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30C-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 SMB8J30C-E3/5B reliable?
The price and inventory of SMB8J30C-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 SMB8J30C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J30C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30C-E3/5B?
SMB8J30C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30C-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 SMB8J30C-E3/5B?
For technical support, including SMB8J30C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30C-E3/5B requirements.
6.How does Aetrix verify that SMB8J30C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J30C-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 SMB8J30C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J30C-E3/5B?
All SMB8J30C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30C-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 SMB8J30C-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J30C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30C-E3/5B Tags
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