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Vishay General Semiconductor - Diodes Division SMB8J15C-E3/5B
- Part No.:
- SMB8J15C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15C-E3/5B.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J15C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) 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 at 32.8 A peak pulse current, and 800 W peak pulse power rating with 10/1000 µs waveform. Used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and lightning-induced transients.
For engineers reviewing the SMB8J15C-E3/5B datasheet, SMB8J15C-E3/5B pinout, SMB8J15C-E3/5B application, or SMB8J15C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.63), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 15 V), while the DO-214AA package supports high surge current handling via optimized thermal path to copper pads.
The device complies with ANSI/IEEE C62.35 for transient suppression and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). It is AEC-Q101 qualified for automotive underhood and body electronics, with operating junction temperature range from –55 °C to +150 °C and thermal resistance RθJL = 20 °C/W to lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min / max | 16.7 V / 18.5 V at 1.0 mA - Confirmed breakdown threshold ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 24.4 V at 32.8 A - Clamping voltage limits downstream IC stress during 800 W transient; clamping ratio = 1.63 supports robust system-level immunity. |
| PPPM | 800 W (10/1000 µs) - Peak pulse power rating determines survivability against IEC 61000-4-5 Level 4 surges (4 kV line-earth). |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| RθJA | 72 °C/W - Thermal resistance value guides minimum copper pad area (0.2" × 0.2") required to maintain junction temperature within limit during repeated surges. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band omitted (bi-directional configuration); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards; RoHS-compliant, AEC-Q101 qualified (HE3 suffix variant available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No polarity marking; terminals interchangeable - enables single-component protection of AC signals, RS-485 buses, or transformer-coupled interfaces. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal path relies on soldered terminations to 5.0 mm × 5.0 mm copper pads per terminal for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body ECUs requiring long-term reliability under thermal cycling and vibration. |
| Low clamping voltage (24.4 V) | Enables protection of 15 V-rated transceivers and microcontrollers without overvoltage damage during 8/20 µs or 10/1000 µs transients. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced failure - eliminates baking requirement prior to assembly. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, with minimal parameter drift versus silicon-processed alternatives. |
| Bi-directional symmetry | Eliminates need for polarity-aware layout; simplifies BOM consolidation for differential pairs (e.g., CAN FD, LIN, RS-422). |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional TVS placed at connector interface to clamp transients before reaching ADC input or signal conditioner IC. Use Value: Withstands 800 W surges and operates up to +150 °C, ensuring functional safety compliance (ISO 26262 ASIL-B supporting elements) without derating. |
Use Scenario: Safeguarding 24 V DC digital input cards in PLCs against field-wiring induced surges and ground loop transients. IC Role / Device Role / Timing Role: Primary surge shunt element located between terminal block and optocoupler input stage. Use Value: 15 V VWM aligns with 24 V system thresholds; 24.4 V VC prevents optocoupler forward-voltage exceedance during 1 kV/500 A surge events. |
| Telecom Line Driver Protection | Consumer USB Interface Protection |
|
Use Scenario: Shielding RS-485 transceivers in base station remote units from lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Paired bi-directional TVS devices on A/B lines referenced to ground, providing symmetrical clamping. Use Value: Matches differential signaling requirements; low capacitance (<100 pF at 0 V) avoids signal edge degradation at 10 Mbps data rates. |
Use Scenario: ESD protection for USB 2.0 D+/D− lines in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Secondary protection stage after integrated ESD array, handling higher-energy contact discharges (IEC 61000-4-2 ±15 kV). Use Value: 800 W PPPM exceeds USB-IF surge test requirements; AEC-Q101 qualification assures batch-to-batch consistency in high-volume production. |
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 | Same DO-214AA package, identical VWM (15 V) and VC (24.4 V), but rated for 600 W PPPM (vs. 800 W for SMB8J15C-E3/5B). | Lower peak power handling limits use in high-surge industrial zones (e.g., factory floor motor drives) where 800 W margin is required. | Select SMBJ15CA only when system-level surge testing confirms ≤600 W threat level and cost optimization is prioritized. |
| 1.5KE15CA | Through-hole DO-201 package, same 15 V VWM and 24.4 V VC, but higher RθJA (60 °C/W) and 1500 W PPPM rating. | Not suitable for dense SMT layouts; requires larger board area and wave-solder process - incompatible with fully automated assembly lines. | Choose 1.5KE15CA only for legacy through-hole designs or prototyping where manual assembly is acceptable and higher peak power is needed. |
Compared with SMBJ15CA and 1.5KE15CA, SMB8J15C-E3/5B uniquely delivers 800 W SMT-compatible surge protection with AEC-Q101 qualification and MSL Level 1 reflow tolerance - making it optimal for next-generation automotive and industrial edge controllers requiring zero rework risk and validated automotive reliability.
Availability
SMB8J15C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line drivers, and consumer USB interface protection requiring stable component supply and full traceability.
Supply support for SMB8J15C-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, power density, and automotive-grade qualification.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial control applications.
FAQ
What is the clamping voltage of SMB8J15C-E3/5B at its rated peak pulse current?
The SMB8J15C-E3/5B has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 32.8 A, measured using a 10/1000 µs waveform. This clamping performance ensures protected downstream circuitry remains below critical voltage thresholds during surge events, and the value is confirmed in Vishay's official datasheet revision 12-Nov-12, page 3 (bi-directional table).
Is SMB8J15C-E3/5B suitable for automotive applications?
Yes, SMB8J15C-E3/5B is AEC-Q101 qualified and explicitly listed in Vishay's documentation as meeting automotive reliability standards. Its –55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow rating, and glass-passivated junction make it appropriate for engine control units, ADAS camera modules, and body electronics where sustained thermal and mechanical stress is expected.
What does the "C" in SMB8J15C-E3/5B indicate?
The "C" in SMB8J15C-E3/5B denotes bi-directional polarity - distinguishing it from uni-directional variants like SMB8J15A. This means the device provides symmetrical clamping for both positive and negative transients, eliminating the need for polarity-aware placement and enabling use on AC-coupled or differential signal lines such as RS-485, CAN, or audio interfaces.
What is the standoff voltage (VWM) and why is it important for SMB8J15C-E3/5B?
The standoff voltage (VWM) of SMB8J15C-E3/5B is 15 V - the maximum DC or continuous reverse voltage the device can withstand without entering avalanche conduction. This parameter is critical for ensuring normal circuit operation without leakage-induced errors or power loss, especially in 12 V automotive systems where a 15 V VWM provides sufficient margin above nominal rail voltage while enabling early clamping onset during overvoltage events.
Does SMB8J15C-E3/5B require special PCB layout considerations?
Yes, SMB8J15C-E3/5B requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 800 W peak pulse power dissipation and thermal performance (RθJA = 72 °C/W). Smaller pads will increase junction temperature during surge events, potentially causing premature failure. The DO-214AA footprint must follow Vishay's recommended mounting pad layout shown in datasheet page 5.
SMB8J15C-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 29.7A
- 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)
SMB8J15C-E3/5B FAQ
1.How can I place an order for SMB8J15C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15C-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 SMB8J15C-E3/5B reliable?
The price and inventory of SMB8J15C-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 SMB8J15C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J15C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15C-E3/5B?
SMB8J15C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15C-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 SMB8J15C-E3/5B?
For technical support, including SMB8J15C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15C-E3/5B requirements.
6.How does Aetrix verify that SMB8J15C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J15C-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 SMB8J15C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J15C-E3/5B?
All SMB8J15C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15C-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 SMB8J15C-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J15C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15C-E3/5B Tags
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Diodes Incorporated
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