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Vishay General Semiconductor - Diodes Division SMB8J15CA-E3/5B
- Part No.:
- SMB8J15CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CA-E3/5B.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,706
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Product details
Overview
SMB8J15CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O ports, and telecom line protection.
For engineers reviewing the SMB8J15CA-E3/5B datasheet, SMB8J15CA-E3/5B pinout, SMB8J15CA-E3/5B application, or SMB8J15CA-E3/5B equivalent, this device is evaluated for AEC-Q101 qualified surge immunity in harsh environments, low-leakage reverse operation at 15 V, and thermal robustness up to 150 °C junction temperature - critical for ESD and lightning-induced transient suppression in safety-critical systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling clamping of positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the SMB package supports automated SMT placement and meets MSL level 1 per J-STD-020 at 260 °C peak reflow.
The device complies with ANSI/IEEE C62.35 standards for transient suppression and delivers 1.0 μA max reverse leakage at VWM, enabling low-power system compatibility. Its 72 °C/W junction-to-ambient thermal resistance requires minimum 5.0 mm × 5.0 mm copper pad layout for rated 800 W dissipation under 10/1000 μs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 16.7 V / 18.5 V - guaranteed breakdown voltage range at 1.0 mA test current |
| VC @ IPPM | 24.4 V - clamping voltage measured at 32.8 A peak pulse current (10/1000 μs) |
| PPPM | 800 W - peak pulse power handling capability under standardized surge waveform |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage ensuring minimal standby power loss |
| TJ max. | +150 °C - maximum junction temperature rating supporting automotive under-hood use |
| Package | SMB (DO-214AA) - surface-mount package with 2.20 mm × 3.94 mm body and matte tin leads |
Pinout & Package
SMB8J15CA-E3/5B uses a 2-terminal SMB (DO-214AA) package with no polarity marking - consistent with bidirectional TVS construction. Terminals are matte tin plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band - enables polarity-agnostic PCB layout |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; requires 5.0 mm × 5.0 mm copper pads per terminal for rated power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standard |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under repeated surge events |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to protected ICs during 10/1000 μs surges |
| MSL Level 1 | Zero floor life limitation - supports unlimited storage and standard reflow without baking |
| RoHS-compliant, halogen-free option available | E3 suffix denotes RoHS compliance; HM3 variant adds halogen-free certification for green manufacturing |
Applications
| Automotive Sensor Protection | Industrial Fieldbus Interface |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: 24.4 V clamping voltage ensures downstream 3.3 V/5 V microcontrollers and ADCs remain within absolute maximum ratings during 100 V/500 ms load dump events. |
Use Scenario: Safeguarding RS-485/RS-422 transceivers in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Line-side TVS mounted differential across A/B bus lines to suppress common-mode and differential-mode transients simultaneously. Use Value: 800 W PPPM rating sustains multiple 1 kV EFT bursts per IEC 61000-4-4 without degradation, preserving communication integrity. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Surge protection on POTS or DSL line cards subjected to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary protection stage before gas discharge tube (GDT) or secondary TVS, absorbing fast-rising transients (<1 ns rise time). Use Value: 32.8 A IPPM and 24.4 V VC limit let-through energy to <10 mJ - below failure threshold of downstream hybrid couplers and transformers. |
Use Scenario: Input-stage transient suppression in AC-DC adapters for smart home devices, guarding against mains-borne surges and capacitor discharge spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk input capacitor to clamp voltage overshoot during hot-plug or rectifier recovery. Use Value: 1.0 μA ID at 15 V VWM prevents measurable standby current increase, maintaining Energy Star efficiency compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/5B | Unidirectional variant with identical VWM, VC, and PPPM but asymmetric conduction - requires polarity-aware layout | Limited to DC-biased lines where reverse polarity is blocked by series components | Select only when unidirectional clamping suffices and board space allows orientation-specific placement |
| SMAJ15CA-E3/5B | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable for lower-energy surges or space-constrained consumer designs, not automotive or industrial | Choose for cost-sensitive, non-AEC-Q101 applications where 800 W rating is unnecessary |
Compared with SMB8J15CA-E3/5B, SMBJ15CA-E3/5B trades bidirectional symmetry for unidirectional precision, while SMAJ15CA-E3/5B sacrifices power handling and thermal performance for footprint reduction - making SMB8J15CA-E3/5B the optimal choice for AEC-Q101-compliant, high-surge industrial and automotive interfaces.
Availability
SMB8J15CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial fieldbus nodes, and telecom line cards requiring stable component supply with full traceability and AEC-Q101 qualification.
Supply support for SMB8J15CA-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 ruggedized performance.
The SMB8J series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power, bidirectional transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 800 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMB8J15CA-E3/5B at its rated peak pulse current?
The SMB8J15CA-E3/5B has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 32.8 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream circuitry remains within safe voltage limits during surge events. The SMB8J15CA-E3/5B achieves this with low incremental surge resistance and a tightly controlled VBR range of 16.7 V to 18.5 V.
Is SMB8J15CA-E3/5B suitable for automotive applications?
Yes, SMB8J15CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with junction temperatures up to +150 °C. Its bidirectional architecture, 800 W PPPM rating, and low-leakage performance make it ideal for protecting CAN, LIN, and sensor interfaces against ISO 7637-2 load dump and ISO 16750-2 supply transients. The SMB8J15CA-E3/5B meets all required stress tests including HTRB, temperature cycling, and ESD per AEC-Q101 Rev D.
How does SMB8J15CA-E3/5B differ from SMBJ15CA-E3/5B?
SMB8J15CA-E3/5B is bidirectional with symmetrical clamping for AC or polarity-agnostic lines, while SMBJ15CA-E3/5B is unidirectional and requires correct cathode orientation. Both share identical VWM (15 V), VC (24.4 V), and PPPM (800 W), but SMBJ15CA-E3/5B exhibits forward conduction below VWM and cannot suppress negative transients without external biasing. The SMB8J15CA-E3/5B eliminates layout polarity constraints and simplifies design for differential or floating signal paths.
What is the thermal resistance of SMB8J15CA-E3/5B, and how does it affect layout?
SMB8J15CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes FR-4 PCB with 1 oz copper and no internal planes. To sustain full 800 W pulse power, designers must adhere strictly to this pad layout - reducing pad size increases junction temperature and derates surge capability per Figure 2 in the datasheet. The SMB8J15CA-E3/5B thermal performance is validated only under these conditions.
Does SMB8J15CA-E3/5B require special handling or moisture sensitivity precautions?
No - SMB8J15CA-E3/5B is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can be processed using standard SMT reflow profiles with peak temperatures up to 260 °C without baking or dry-pack requirements. Its epoxy molding compound is moisture-resistant, and the matte tin-plated leads comply with J-STD-002 for solderability. This eliminates moisture-related defects like popcorning and simplifies manufacturing for SMB8J15CA-E3/5B integration.
SMB8J15CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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)
SMB8J15CA-E3/5B FAQ
1.How can I place an order for SMB8J15CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CA-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 SMB8J15CA-E3/5B reliable?
The price and inventory of SMB8J15CA-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 SMB8J15CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J15CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CA-E3/5B?
SMB8J15CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CA-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 SMB8J15CA-E3/5B?
For technical support, including SMB8J15CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J15CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J15CA-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 SMB8J15CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J15CA-E3/5B?
All SMB8J15CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CA-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 SMB8J15CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J15CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CA-E3/5B Tags
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