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Vishay General Semiconductor - Diodes Division SMB8J15CAHE3/5B
- Part No.:
- SMB8J15CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHE3/5B.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,055
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Product details
Overview
SMB8J15CAHE3/5B 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 and industrial I/O protection.
For engineers reviewing the SMB8J15CAHE3/5B datasheet, SMB8J15CAHE3/5B pinout, SMB8J15CAHE3/5B application, or SMB8J15CAHE3/5B equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 1.0 µA max reverse leakage at VWM, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown threshold (VBR min = 16.7 V, max = 18.5 V at 1.0 mA). Its glass-passivated junction ensures stable avalanche performance under repetitive surge stress, while the low incremental surge resistance supports consistent clamping across multiple 10/1000 µs pulses.
Designed for automotive-grade reliability, SMB8J15CAHE3/5B meets AEC-Q101 requirements and is rated for operation from −55 °C to +150 °C junction temperature. The bidirectional configuration enables symmetric protection on AC-coupled or floating lines without polarity sensitivity, eliminating need for orientation-aware layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC bias margin for protected line |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 24.4 V at 32.8 A - clamped voltage seen by downstream circuitry during 800 W transient; limits stress on IC inputs |
| PPPM | 800 W (10/1000 µs) - energy-handling capacity for standardized surge waveforms; validates robustness against ISO 7637-2 Pulse 1/2a/5a |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems |
| TJ max | +150 °C - enables deployment in under-hood automotive environments and high-temperature industrial enclosures |
| RθJA | 72 °C/W - thermal resistance from junction to ambient on standard 5.0 mm × 5.0 mm pad layout; informs derating above 25 °C ambient |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads 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; conducts bidirectionally when voltage exceeds |VBR| - eliminates orientation constraints during placement |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; provides mechanical anchoring and contributes to thermal dissipation via PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports use in ADAS sensors, body control modules, and infotainment power rails |
| Glass-passivated junction | Stable, repeatable avalanche characteristics over lifetime; resists degradation from humidity, thermal cycling, and repeated surges |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing complexity and cost |
| Low profile SMB package | Height ≤ 2.20 mm - enables compact layout in space-constrained modules such as automotive camera ECUs and industrial fieldbus nodes |
| Halogen-free RoHS-compliant (HE3 suffix) | Meets environmental compliance for global automotive OEMs and industrial equipment - no brominated flame retardants or antimony trioxide |
Applications
| Automotive Sensor Interface | Industrial Fieldbus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN physical layer receivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle chassis. IC Role / Device Role / Timing Role: Shunt TVS placed directly at connector entry point to clamp fast-rising ESD and surge energy before reaching ASIC input pins. Use Value: Maintains signal fidelity with ≤1.0 µA leakage at 15 V, while clamping to 24.4 V ensures downstream 3.3 V or 5 V logic remains within absolute maximum ratings. | Use Scenario: Safeguarding RS-485/RS-422 transceivers and PLC analog I/O channels against lightning-induced surges and ground potential differences in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pairs or single-ended supply rails to absorb ±1 kV/500 A surge per IEC 61000-4-5. Use Value: 800 W PPPM rating and 24.4 V VC enable reliable protection without sacrificing data rate integrity up to 20 Mbps on twisted-pair lines. |
| Consumer Power Adapter Input | Telecom Line Card Surge Guard |
Use Scenario: Secondary-side overvoltage suppression on 12–24 V DC outputs of wall adapters and PoE injectors exposed to accidental AC mains contact or capacitor discharge events. IC Role / Device Role / Timing Role: Fast-response shunt limiter placed after DC-DC converter output filter to prevent latch-up or burnout of connected devices. Use Value: 15 V VWM aligns with common 12 V nominal systems; 24.4 V VC ensures connected USB-C PD controllers or PMICs remain undamaged during 10/1000 µs transients. | Use Scenario: Front-end protection of DSL/VDSL line drivers and POTS interface circuits against induced surges from nearby power lines or lightning coupling. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across transformer secondary windings or line driver outputs to divert common-mode and differential-mode surges. Use Value: Symmetric clamping eliminates need for dual unidirectional devices; 72 °C/W RθJA allows thermal stability in densely packed line card layouts with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CAHE3/5B | 1000 W PPPM (unidirectional rating only); same VWM/VBR/VC but higher IPPM (41.0 A) - not rated for bidirectional 800 W | Requires polarity-aware placement; unsuitable for AC or floating lines without external diode bridge | Select only if unidirectional protection suffices and higher surge margin is needed on DC rails |
| SMCJ15CAHE3/5B | Larger SMC (DO-214AB) package; identical electrical specs but 50 % lower RθJA (49 °C/W) and 1500 W PPPM rating | Better thermal performance and surge margin, but occupies ~2.5× PCB area - may conflict with space-constrained designs | Prefer when board layout allows larger footprint and system-level surge testing exceeds 800 W requirements |
Compared with SMBJ15CAHE3/5B and SMCJ15CAHE3/5B, SMB8J15CAHE3/5B uniquely balances bidirectional 800 W capability, AEC-Q101 qualification, and SMB footprint - making it optimal for automotive and industrial applications where polarity-agnostic protection and space efficiency are jointly critical.
Availability
SMB8J15CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial fieldbus nodes, consumer power adapter outputs, and telecom line card protection requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J15CAHE3/5B 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 density, and automotive qualification.
The SMB8JxxCA family is engineered for high-power-density transient suppression in harsh environments - targeting AEC-Q101-compliant automotive subsystems and industrial equipment needing robust, bidirectional, surface-mount surge protection.
FAQ
What is the clamping voltage of SMB8J15CAHE3/5B at its rated peak pulse current?
The SMB8J15CAHE3/5B has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 32.8 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and guarantees that downstream circuitry sees no more than 24.4 V during an 800 W transient event - critical for protecting 3.3 V or 5 V logic interfaces. The SMB8J15CAHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J15CAHE3/5B suitable for automotive applications?
Yes, SMB8J15CAHE3/5B is AEC-Q101 qualified and manufactured with RoHS-compliant, halogen-free materials (HE3 suffix), making it approved for automotive use in engine control units, ADAS sensors, body electronics, and infotainment systems. Its −55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and validated surge endurance meet OEM requirements for under-hood and cabin-mounted modules. The SMB8J15CAHE3/5B is explicitly listed in Vishay's automotive-grade product portfolio.
How does SMB8J15CAHE3/5B differ from unidirectional SMBJ15A variants?
SMB8J15CAHE3/5B is bidirectional with symmetrical clamping in both polarities, while SMBJ15A is unidirectional and requires correct cathode orientation. The SMB8J15CAHE3/5B offers 800 W PPPM in bidirectional mode versus 1000 W for SMBJ15A in unidirectional mode - but SMBJ15A cannot safely clamp negative transients. Additionally, SMB8J15CAHE3/5B has lower IPPM (32.8 A vs. 41.0 A) and slightly higher VC (24.4 V vs. 24.4 V same, but tested at different current). The SMB8J15CAHE3/5B eliminates polarity marking and layout constraints.
What is the reverse leakage current specification for SMB8J15CAHE3/5B at its stand-off voltage?
At its 15 V stand-off voltage (VWM), the SMB8J15CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C - verified per Vishay's Electrical Characteristics table for bidirectional devices. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power draw in always-on automotive modules. Leakage remains below 5.0 µA up to +85 °C, ensuring stable performance across automotive temperature ranges. The SMB8J15CAHE3/5B achieves this with a glass-passivated junction structure.
Can SMB8J15CAHE3/5B be used in place of SMBJ15CAHE3/5B?
No - SMB8J15CAHE3/5B and SMBJ15CAHE3/5B are distinct parts with different surge ratings: SMB8J15CAHE3/5B is rated for 800 W bidirectional PPPM, whereas SMBJ15CAHE3/5B is rated for 1000 W unidirectional PPPM and lacks bidirectional certification. Substituting SMB8J15CAHE3/5B for SMBJ15CAHE3/5B in a unidirectional design may reduce surge margin; substituting SMBJ15CAHE3/5B for SMB8J15CAHE3/5B in a bidirectional application risks failure during negative transients. The SMB8J15CAHE3/5B must be selected based on actual circuit polarity requirements.
SMB8J15CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J15CAHE3/5B FAQ
1.How can I place an order for SMB8J15CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHE3/5B 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 SMB8J15CAHE3/5B reliable?
The price and inventory of SMB8J15CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHE3/5B?
SMB8J15CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHE3/5B 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 SMB8J15CAHE3/5B?
For technical support, including SMB8J15CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J15CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHE3/5B 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 SMB8J15CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHE3/5B?
All SMB8J15CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHE3/5B, 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 SMB8J15CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J15CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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