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Vishay General Semiconductor - Diodes Division SMB8J24CHE3/52
- Part No.:
- SMB8J24CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CHE3/52.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,581
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Product details
Overview
SMB8J24CHE3/52 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 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 (PPPM) with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMB8J24CHE3/52 datasheet, SMB8J24CHE3/52 pinout, SMB8J24CHE3/52 application, or SMB8J24CHE3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 24 V working voltage compatibility, thermal resistance (RθJA = 72 °C/W), and DO-214AA mounting requirements for automotive-grade PCB layouts.
Technical Context
This bi-directional TVS diode 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 VWM), while the low incremental surge resistance supports fast clamping response under 10/1000 µs transients.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 72 °C/W junction-to-ambient thermal resistance requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full 800 W rating compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse stand-off voltage before conduction begins; defines safe operating range for protected circuit. |
| VBR min / max | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | 38.9 V at 20.6 A - Clamping voltage during 10/1000 µs surge; limits transient voltage seen by downstream ICs. |
| PPPM | 800 W - Peak pulse power handling with 10/1000 µs waveform; determines energy absorption capacity per transient event. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at 24 V; negligible loading on high-impedance sensor or communication lines. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance; dictates required PCB copper area for thermal management. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking. Cathode band absent; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Bi-directional conduction path - either terminal serves as anode or cathode depending on transient polarity; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low parameter drift over temperature and lifetime. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow processes without preconditioning or special handling. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation material meeting flammability safety requirements for enclosed automotive modules. |
| Matte tin plated leads | RoHS-compliant terminations solderable per J-STD-002 and JESD 22-B102; HE3 suffix meets JESD 201 Class 2 whisker resistance. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bay or chassis modules exposed to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between sensor output and microcontroller ADC input or signal conditioner. Use Value: Limits transient voltage to ≤38.9 V during 20.6 A surges, preventing damage to 3.3 V or 5 V rail-tied signal chain components. |
Use Scenario: Guarding CAN_H and CAN_L lines in vehicle ECUs and gateway modules against ESD (IEC 61000-4-2 ±15 kV) and burst noise (IEC 61000-4-4). IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed differential across CAN bus pair, referenced to ground via common-mode choke. Use Value: Maintains signal integrity with <1.0 µA leakage at 24 V, while clamping common-mode surges without disrupting 1 Mbps CAN timing. |
| Power Supply Input Protection | Industrial Digital I/O Protection |
|
Use Scenario: Safeguarding 24 V DC input rails of PLC modules, motor drives, and lighting controllers against load dump (ISO 16750-2) and jump-start events. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converter input, paralleled with fuse or polyfuse. Use Value: Absorbs up to 800 W (10/1000 µs) without failure, limiting input voltage excursion to ≤38.9 V and preserving downstream regulator functionality. |
Use Scenario: Shielding 24 V digital input channels in factory automation I/O cards from field-wiring induced transients and ground bounce. IC Role / Device Role / Timing Role: Point-of-entry protection on each optocoupler input line, mounted directly at connector interface. Use Value: Enables reliable detection of 10–30 V logic states while surviving repeated 1 kV/500 Ω ring wave surges per IEC 61000-4-5. |
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 DO-214AA package and 24 V VWM, but rated for 600 W PPPM (vs. 800 W) and 15.5 A IPPM (vs. 20.6 A); not AEC-Q101 qualified. | Limited to commercial-grade industrial equipment; unsuitable for automotive under-hood use due to qualification gap and lower surge margin. | Select when cost sensitivity outweighs automotive qualification and higher surge immunity requirements. |
| SMCJ24CAHE3/52 | DO-214AB (SMC) package, same 24 V VWM and AEC-Q101 qualification, but rated for 1500 W PPPM and 39.4 A IPPM; larger footprint (7.11 × 6.22 mm vs. 4.57 × 3.94 mm). | Supports higher-energy transients in battery management or alternator regulation systems; requires PCB layout revision for larger pad area. | Select when system-level surge testing exceeds 800 W or when design margin must accommodate aging derating. |
Compared with SMBJ24CA-E3/52 and SMCJ24CAHE3/52, SMB8J24CHE3/52 uniquely balances AEC-Q101 qualification, 800 W surge capability, and compact DO-214AA footprint-making it optimal for space-constrained automotive sensor nodes where both reliability and board area are critical.
Availability
SMB8J24CHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and 24 V power supply input protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J24CHE3/52 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-power density packaging.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What is the polarity configuration of SMB8J24CHE3/52?
SMB8J24CHE3/52 is a bi-directional TVS diode with symmetrical terminals and no polarity marking. It conducts equally in both directions once the breakdown voltage is exceeded, making it ideal for protecting AC-coupled signals, differential buses like CAN, or unidirectional lines where reverse voltage risk exists. The device does not have a cathode band, unlike uni-directional variants.
Is SMB8J24CHE3/52 suitable for automotive applications?
Yes, SMB8J24CHE3/52 is AEC-Q101 qualified and rated for -55 °C to +150 °C junction temperature, making it suitable for under-hood and chassis-mounted automotive electronics. Its 800 W peak pulse power rating and 24 V stand-off voltage align with ISO 16750-2 load dump and ISO 7637-2 transient immunity requirements commonly specified for engine control units and sensor modules.
What is the clamping voltage of SMB8J24CHE3/52 under surge conditions?
The maximum clamping voltage (VC) of SMB8J24CHE3/52 is 38.9 V at 20.6 A peak pulse current (IPPM), tested with a 10/1000 µs waveform. This value represents the upper limit of voltage imposed on the protected circuit during worst-case transient events, ensuring downstream 3.3 V or 5 V logic components remain within safe operating limits when properly decoupled.
Does SMB8J24CHE3/52 require special PCB layout considerations?
Yes - to achieve its rated 800 W peak pulse power, SMB8J24CHE3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's thermal characterization. Smaller pads reduce heat dissipation, derating both power handling and surge current capability. Thermal vias under pads are recommended for high-reliability automotive designs.
How does the HE3 suffix affect SMB8J24CHE3/52?
HE3 indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. This distinguishes SMB8J24CHE3/52 from commercial-grade E3-suffix parts (e.g., SMBJ24CA-E3/52), confirming suitability for automotive production and long-life industrial deployments where metallurgical reliability under thermal cycling is critical.
SMB8J24CHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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)
SMB8J24CHE3/52 FAQ
1.How can I place an order for SMB8J24CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CHE3/52 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 SMB8J24CHE3/52 reliable?
The price and inventory of SMB8J24CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J24CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J24CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CHE3/52?
SMB8J24CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CHE3/52 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 SMB8J24CHE3/52?
For technical support, including SMB8J24CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CHE3/52 requirements.
6.How does Aetrix verify that SMB8J24CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J24CHE3/52 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 SMB8J24CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J24CHE3/52?
All SMB8J24CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CHE3/52, 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 SMB8J24CHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J24CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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