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Vishay General Semiconductor - Diodes Division SMB8J15CAHE3_B/I
- Part No.:
- SMB8J15CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHE3_B/I.pdf
- Description:
- 800W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,513
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Product details
Overview
SMB8J15CAHE3_B/I 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_B/I datasheet, SMB8J15CAHE3_B/I pinout, SMB8J15CAHE3_B/I application, or SMB8J15CAHE3_B/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.63), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD. Its glass-passivated junction ensures stable breakdown behavior, while the bidirectional configuration enables symmetric clamping across both polarities without external polarity management.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for protection of 12 V nominal systems. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Confirmed breakdown range ensures reliable triggering above VWM with margin against false trips. |
| VC @ IPPM | 24.4 V at 32.8 A - Clamping voltage limits downstream IC stress during 800 W transient events (10/1000 µs). |
| PPPM | 800 W - Peak pulse power rating defines maximum transient energy absorption capability in bidirectional mode. |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Surface-mount footprint (4.57 mm × 3.94 mm) compatible with standard reflow profiles and pick-and-place equipment. |
Pinout & Package
SMB8J15CAHE3_B/I uses the SMB (DO-214AA) package: a two-terminal, non-polarized surface-mount device with no cathode marking (bidirectional type). Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals serve identically as input/output nodes; bidirectional conduction allows placement without orientation constraints on PCB. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; thermal path relies on copper pad area (0.2" × 0.2") for RθJA = 72 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and HTRB - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in harsh environments. |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfacing with 12 V supply domains. |
| MSL Level 1 rating | Enables unlimited floor life and standard reflow without baking - reduces manufacturing overhead in high-volume SMT lines. |
| Halogen-free RoHS-compliant (HE3 suffix) | Meets automotive environmental compliance requirements (e.g., ELV, IMDS) without compromising surge robustness. |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
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: Shunt-type transient clamp placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: Withstands 800 W surges while limiting clamped voltage to 24.4 V - preserving integrity of 24 V-rated transceivers and 5 V ADC front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and field wiring transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across dry-contact inputs and 24 V DC sensing lines to prevent latch-up or damage during switching events. Use Value: 1.0 µA leakage at 15 V VWM avoids false triggering in high-impedance input circuits; AEC-Q101 grade supports extended industrial lifecycle validation. |
| Consumer Power Adapter ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression on USB-C PD and AC/DC adapter outputs subject to human-body-model (HBM) and system-level ESD. IC Role / Device Role / Timing Role: Fast-response TVS placed between VBUS and GND to clamp ESD events before reaching USB controller or load switch. Use Value: Sub-nanosecond response and 24.4 V VC ensure <100 ns overvoltage exposure - meeting IEC 61000-4-2 Level 4 (15 kV air) requirements. | Use Scenario: Primary protection for Ethernet PHYs and PoE injectors against lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: First-stage bidirectional clamp on differential pairs to reduce surge amplitude prior to secondary GDT or polymer-based protection. Use Value: 800 W PPPM and symmetrical clamping enable robust handling of 10/700 µs telecom surges without polarity sensitivity or board layout constraints. |
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-E3/52 | Unqualified commercial grade; same VWM/VC/IPPM but lacks AEC-Q101 validation and HE3 halogen-free compliance. | Restricted to non-automotive industrial or consumer use where automotive qualification is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free mandate. |
| SMCJ15CAHE3_A/H | Higher PPPM (1500 W), larger SMC (DO-214AB) package; identical VWM/VC but requires 2.5× more PCB area. | Used where higher surge margin is needed (e.g., outdoor telecom, EV charging stations) and board space permits. | Choose only if 1500 W rating is required and SMB footprint constraint does not apply. |
Compared with SMBJ15CA-E3/52, SMB8J15CAHE3_B/I adds AEC-Q101 qualification and halogen-free construction without sacrificing electrical specs; versus SMCJ15CAHE3_A/H, it trades 70% lower footprint for 47% less peak power - optimizing for space-constrained automotive modules.
Availability
SMB8J15CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and consumer power adapter ESD suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J15CAHE3_B/I 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, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and industrial environments where compact size and robust surge handling are mandatory.
FAQ
What is the clamping voltage of SMB8J15CAHE3_B/I at its rated peak pulse current?
The SMB8J15CAHE3_B/I 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 ensures predictable overvoltage limiting for protected downstream circuitry such as microcontrollers or transceivers.
Is SMB8J15CAHE3_B/I suitable for automotive applications?
Yes, SMB8J15CAHE3_B/I is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS-compliance and automotive-grade reliability. It is explicitly rated for operation from –55 °C to +150 °C and validated for temperature cycling, humidity bias, and high-temperature reverse bias - making it appropriate for engine control units, ADAS sensors, and body electronics.
What does the "CA" in SMB8J15CAHE3_B/I indicate?
The "CA" in SMB8J15CAHE3_B/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMB8J15A), this part has no polarity marking and can be placed without orientation concern on PCBs protecting AC-coupled or differential signal paths.
How does SMB8J15CAHE3_B/I differ from SMBJ15CA in terms of surge rating?
SMB8J15CAHE3_B/I delivers 800 W peak pulse power (PPPM) in bidirectional mode, whereas the SMBJ15CA family offers 600 W for bidirectional versions. The higher rating stems from optimized chip geometry and thermal design in the SMB8J series, enabling greater energy absorption without increasing package size - a key advantage for space-constrained automotive modules.
What packaging format is supplied for SMB8J15CAHE3_B/I?
SMB8J15CAHE3_B/I is supplied in 13-inch diameter plastic tape and reel format (package code "I"), with a base quantity of 3200 units per reel. This format supports high-speed automated placement and is compatible with standard SMT feeders used in automotive and industrial electronics manufacturing.
SMB8J15CAHE3_B/I 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:
- 15V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- Telecom
- 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_B/I FAQ
1.How can I place an order for SMB8J15CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHE3_B/I 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_B/I reliable?
The price and inventory of SMB8J15CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHE3_B/I?
SMB8J15CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHE3_B/I 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_B/I?
For technical support, including SMB8J15CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHE3_B/I requirements.
6.How does Aetrix verify that SMB8J15CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHE3_B/I 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_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHE3_B/I?
All SMB8J15CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHE3_B/I, 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_B/I part is unused and in its original packaging.
Return procedure for SMB8J15CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CAHE3_B/I Tags
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