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Vishay General Semiconductor - Diodes Division SMB8J24CA-E3/5B
- Part No.:
- SMB8J24CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CA-E3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,630
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Product details
Overview
SMB8J24CA-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 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V clamping voltage (VC) at 20.6 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 SMB8J24CA-E3/5B datasheet, SMB8J24CA-E3/5B pinout, SMB8J24CA-E3/5B application, or SMB8J24CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1 µA at VWM), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection against voltage transients induced by inductive load switching, ESD, and lightning surges without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive stress.
The device complies with ANSI/IEEE C62.35 standards for transient suppression and is rated for operation from –55 °C to +150 °C junction temperature. Thermal resistance is 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable power dissipation in compact PCB layouts with minimum recommended pad dimensions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - guaranteed breakdown threshold range ensuring consistent turn-on behavior across production lots |
| VC @ IPPM | 38.9 V at 20.6 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure level |
| PPPM | 800 W - peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| ID @ VWM | <1 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems |
| TJ max. | +150 °C - extended thermal rating supports under-hood automotive and high-temperature industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114 |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient conduction path (both directions) | Acts as common terminal for symmetrical clamping; no color band - bidirectional symmetry eliminates orientation dependency during placement |
| Anode (Cathode) | Transient conduction path (both directions) | Electrically identical to opposite terminal; enables single-component protection of AC-coupled or floating signal lines without polarity concerns |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential pairs, AC signals, and ungrounded buses without external polarity management |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics requiring long-term field reliability |
| Low-profile SMB package | 0.220" × 0.130" footprint with 0.086" height fits space-constrained layouts while maintaining 800 W surge capability |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, critical for precision voltage thresholding in safety-critical protection circuits |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak, eliminating bake requirements and simplifying high-volume SMT manufacturing |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt surge energy before reaching IC pins. Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining signal fidelity during normal operation. |
Use Scenario: Safeguarding PLC digital input modules against inductive kickback from solenoids, relays, and motor contactors. IC Role / Device Role / Timing Role: Primary front-end surge absorber on 24 V DC input lines, coordinated with series impedance and filtering components. Use Value: Absorbs up to 800 W of transient energy without degradation, extending system uptime and reducing field failure rates in factory automation equipment. |
| Telecom Line Interface | Consumer USB Port Protection |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level protector downstream of gas discharge tubes (GDTs), providing fast-response clamping after coarse suppression. Use Value: Responds in <1 ps to clamp transients to safe levels, preserving Ethernet signal integrity and avoiding PHY reset or data corruption. |
Use Scenario: Hardening USB 2.0 data lines (D+/D−) and VBUS against ESD events per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector to divert ESD current away from USB transceiver ESD structures. Use Value: Delivers sub-100 ns response with <1 µA leakage, ensuring USB enumeration reliability and zero signal distortion 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 |
|---|---|---|---|
| SMBJ24CA-E3/52 | Same electrical specs but packaged in 7" tape (750 pcs/reel); identical SMB package and AEC-Q101 qualification | No functional difference; selected when smaller reel size aligns with SMT line changeover frequency or inventory turnover | Preferred for low-volume prototyping or mixed-product feeders where 7" reels reduce setup time |
| SMCJ24CA-E3/57 | Higher PPPM (1500 W), larger SMC (DO-214AB) package; same VWM/VBR/VC ratings and AEC-Q101 qualification | Used where higher surge margin is required (e.g., 12 V battery rail protection), but requires PCB layout revision due to 2.5× larger footprint | Chosen when system-level surge testing exceeds 800 W compliance and board space permits larger package |
Compared with SMB8J24CA-E3/5B, SMBJ24CA-E3/52 offers identical protection performance in a smaller reel format, while SMCJ24CA-E3/57 trades compactness for 87.5% higher surge power handling - making the SMB8J24CA-E3/5B optimal for space-constrained, high-reliability bidirectional protection where 800 W suffices.
Availability
SMB8J24CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line interfaces, and consumer USB port protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J24CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for automotive and industrial surge immunity where bidirectional clamping, AEC-Q101 compliance, and compact SMB packaging are mandatory.
FAQ
What is the clamping voltage of SMB8J24CA-E3/5B at its rated peak pulse current?
The SMB8J24CA-E3/5B has a maximum clamping voltage (VC) of 38.9 V at 20.6 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J24CA-E3/5B suitable for automotive applications?
Yes, SMB8J24CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor modules, and body electronics. Its –55 °C to +150 °C operating range, robust surge handling, and glass-passivated junction meet stringent automotive reliability requirements defined in JESD22-A114 and JESD22-A108.
How does SMB8J24CA-E3/5B differ from unidirectional variants like SMB10J24A-E3/5B?
SMB8J24CA-E3/5B is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas SMB10J24A-E3/5B is unidirectional with a cathode band and 1000 W PPPM. The "8" prefix denotes 800 W bidirectional rating; "10" indicates 1000 W unidirectional. SMB8J24CA-E3/5B is used where AC or floating signals require polarity-agnostic protection.
What is the maximum reverse leakage current for SMB8J24CA-E3/5B at its stand-off voltage?
At its 24 V stand-off voltage (VWM), the SMB8J24CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power draw in always-on automotive modules.
Does SMB8J24CA-E3/5B require special handling during PCB assembly?
No - SMB8J24CA-E3/5B meets MSL Level 1 per J-STD-020 and supports lead-free reflow profiles with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, enabling standard SMT processes without baking, dry pack, or humidity-controlled storage.
SMB8J24CA-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMB8J24CA-E3/5B FAQ
1.How can I place an order for SMB8J24CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CA-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 SMB8J24CA-E3/5B reliable?
The price and inventory of SMB8J24CA-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 SMB8J24CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J24CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CA-E3/5B?
SMB8J24CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CA-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 SMB8J24CA-E3/5B?
For technical support, including SMB8J24CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J24CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J24CA-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 SMB8J24CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J24CA-E3/5B?
All SMB8J24CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CA-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 SMB8J24CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J24CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J24CA-E3/5B Tags
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Diodes Incorporated
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Diodes Incorporated
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