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Vishay General Semiconductor - Diodes Division SMB8J24CA-E3/52
- Part No.:
- SMB8J24CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CA-E3/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,016
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Product details
Overview
SMB8J24CA-E3/52 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), 38.9 V maximum clamping voltage (VC) at 20.6 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform), with AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J24CA-E3/52 datasheet, SMB8J24CA-E3/52 pinout, SMB8J24CA-E3/52 application, or SMB8J24CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1.0 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 TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetric protection on AC-coupled or floating lines without polarity concerns.
The device is rated for -55 °C to +150 °C operating junction temperature and exhibits typical thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation under repeated surge stress when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 26.7 V / 29.5 V - Breakdown voltage range at 1.0 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 38.9 V - Clamping voltage at 20.6 A peak pulse current; limits downstream voltage stress during 800 W transient events. |
| IPPM | 20.6 A - Peak pulse current (10/1000 µs waveform); quantifies surge-handling capacity for system-level IEC 61000-4-5 compliance. |
| ID @ VWM | <1.0 µA - Reverse leakage at stand-off voltage; minimizes quiescent power loss and avoids false triggering in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive deployment and industrial environments with elevated ambient temps. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
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 requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity across the device. |
| Case (body) | Thermal and mechanical interface | Plastic molded case provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads via thermal vias or wide traces. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under repetitive surge stress. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without pre-baking, reducing manufacturing complexity and cost. |
| Low profile SMB package | 0.130"–0.155" height enables compact board layouts and compatibility with automated pick-and-place equipment. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring extended temperature and lifetime reliability. |
| 800 W peak pulse power | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) in 24 V systems. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN or SENT sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle chassis modules. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point to divert surge energy before reaching ASIC input pins. Use Value: Limits voltage seen by sensor IC to ≤38.9 V during 20.6 A transients, preventing latch-up or gate oxide damage in 24 V supply domains. | Use Scenario: Safeguarding CANH/CANL differential pair in industrial PLCs exposed to motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CAN bus lines to clamp both positive and negative polarity surges without affecting signal integrity. Use Value: Maintains <1.0 µA leakage at 24 V common-mode bias, preserving bus DC termination and minimizing bit error rate under steady-state conditions. |
| Telecom Power Input Stage | Consumer USB-C Port Protection |
Use Scenario: Front-end surge suppression on 24 V telecom power inputs subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter, sized to absorb 800 W pulses without thermal runaway. Use Value: Achieves 72 °C/W junction-to-ambient thermal resistance when mounted on 5.0 mm × 5.0 mm pads, enabling sustained operation after multiple surges. | Use Scenario: Overvoltage protection for USB-C CC and VCONN lines in portable docking stations handling 20 V PD negotiation. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB-C receptacle to suppress ESD and hot-swap transients. Use Value: Delivers sub-1 µA leakage at 24 V, avoiding false detection of accessory insertion while maintaining fast response to ±15 kV contact ESD per IEC 61000-4-2. |
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 | 1000 W unidirectional rating vs. 800 W bidirectional; same VWM/VC but asymmetric clamping. | Requires polarity awareness; unsuitable for AC or floating lines where voltage polarity reverses. | Select SMBJ24CA-E3/52 only when protecting DC rails with known polarity and higher surge margin is required. |
| SAC24-01ETG | Lower 600 W rating; tighter VBR tolerance (±5 %); smaller SOD-123FL package. | Limited thermal mass reduces single-pulse energy handling; not AEC-Q101 qualified. | Prefer SAC24-01ETG for space-constrained consumer designs where automotive qualification is unnecessary. |
Compared with SMBJ24CA-E3/52 and SAC24-01ETG, SMB8J24CA-E3/52 uniquely balances 800 W bidirectional clamping, AEC-Q101 qualification, and SMB footprint-making it optimal for automotive and industrial 24 V interfaces needing polarity-agnostic surge immunity without layout redesign.
Availability
SMB8J24CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, telecom power supplies, and USB-C docking stations requiring stable component supply and full traceability.
Supply support for SMB8J24CA-E3/52 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, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh-environment 12 V–40 V systems.
FAQ
What is the clamping voltage of SMB8J24CA-E3/52 at its rated peak pulse current?
The SMB8J24CA-E3/52 has a maximum clamping voltage (VC) of 38.9 V at its specified peak pulse current (IPPM) of 20.6 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry will not experience voltages exceeding 38.9 V during an 800 W transient event, making SMB8J24CA-E3/52 suitable for protecting 24 V-rated ICs and interfaces.
Is SMB8J24CA-E3/52 suitable for automotive applications?
Yes, SMB8J24CA-E3/52 is AEC-Q101 qualified and explicitly designated for automotive use in Vishay's documentation. Its construction-including glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature-meets requirements for engine control units, body electronics, and ADAS sensors. The "HE3" suffix variant (e.g., SMB8J24CAHE3_B/H) denotes the AEC-Q101 version, while SMB8J24CA-E3/52 is RoHS-compliant commercial grade with identical electrical specs.
How does the bidirectional configuration of SMB8J24CA-E3/52 affect circuit design?
The bidirectional configuration of SMB8J24CA-E3/52 eliminates polarity dependency, allowing placement across AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating grounds without orientation constraints. Unlike unidirectional TVS diodes, SMB8J24CA-E3/52 clamps equally for both positive and negative transients, simplifying layout and reducing BOM count in systems where voltage polarity may reverse or is undefined.
What is the recommended PCB pad layout for SMB8J24CA-E3/52 to achieve rated thermal performance?
Vishay specifies mounting SMB8J24CA-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated 72 °C/W junction-to-ambient thermal resistance. Use minimum 2 oz copper, incorporate thermal vias under pads if possible, and avoid narrow traces between the device and ground/power planes. Deviating from this layout reduces surge current handling and increases junction temperature during repeated transients.
Does SMB8J24CA-E3/52 meet industry surge immunity standards such as IEC 61000-4-5?
SMB8J24CA-E3/52 supports compliance with IEC 61000-4-5 when applied per Vishay's recommended layout and system-level design. Its 800 W peak pulse power rating corresponds to Level 4 (4 kV line-earth, 2 kV line-line) for 24 V systems using appropriate series impedance. Full system validation-including coupling network, source impedance, and board parasitics-is required, but SMB8J24CA-E3/52 provides the foundational clamping performance needed to pass standardized surge testing.
SMB8J24CA-E3/52 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-E3/52 FAQ
1.How can I place an order for SMB8J24CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CA-E3/52 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-E3/52 reliable?
The price and inventory of SMB8J24CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J24CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J24CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CA-E3/52?
SMB8J24CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CA-E3/52 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-E3/52?
For technical support, including SMB8J24CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J24CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J24CA-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J24CA-E3/52?
All SMB8J24CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CA-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J24CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J24CA-E3/52 Tags
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