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Vishay General Semiconductor - Diodes Division SMB8J24CAHE3_B/H
- Part No.:
- SMB8J24CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CAHE3_B/H.pdf
- Description:
- 800W,24V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,846
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Product details
Overview
SMB8J24CAHE3_B/H 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 (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J24CAHE3_B/H datasheet, SMB8J24CAHE3_B/H pinout, SMB8J24CAHE3_B/H application, or SMB8J24CAHE3_B/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.62), 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 crowbar device during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping for AC-coupled or floating lines without polarity concerns.
Rated for -55 °C to +150 °C junction temperature, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 1.0 µA max reverse leakage at VWM, and delivers stable clamping performance across temperature when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal swing range. |
| VBR (min/max) | 26.7 V / 29.5 V at 1.0 mA - Breakdown threshold range ensures consistent turn-on across production lot. |
| VC @ IPPM | 38.9 V at 20.6 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 800 W - Peak pulse power handling capacity; determines survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; negligible loading on high-impedance sensor or communication lines. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.20 mm × 3.94 mm body; compatible with IPC-7351B footprint. |
Pinout & Package
SMB8J24CAHE3_B/H uses a 2-terminal SMB (DO-214AA) package with no polarity marking - consistent with bidirectional TVS construction. Terminals are matte tin-plated leads, 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 conduction path | Both terminals function identically; no cathode band - enables blind orientation during pick-and-place. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal resistance RθJA = 72 °C/W on 5.0 mm × 5.0 mm pads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Eliminates moisture sensitivity and improves long-term stability of breakdown voltage vs. humidity exposure. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage stress on protected ICs compared to alternatives with ratios > 1.8 - critical for 3.3 V or 5 V logic interfaces. |
| MSL Level 1 rating | Enables single-pass reflow without baking; supports high-throughput manufacturing with peak profile up to 260 °C. |
| Halogen-free option available | HM3 suffix variants comply with RoHS and JEDEC JS709E - meets Tier 1 automotive material declarations. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD transceiver inputs from load-dump and ISO 7637-2 pulse 5a surges in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point, shunting surge energy to ground before reaching PHY layer. Use Value: Maintains 24 V VWM margin above nominal 12 V supply while clamping to 38.9 V - prevents damage to 40 V-rated CAN drivers. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring transients. IC Role / Device Role / Timing Role: Primary front-end TVS on each isolated input channel, coordinated with series impedance and filtering. Use Value: 800 W PPPM rating sustains repeated 1 kV/500 A surges per IEC 61000-4-4; low leakage avoids false triggering in high-Z sensing circuits. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
|
Use Scenario: Shielding USB 2.0 D+/D- lines in automotive infotainment head units from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector, minimizing trace inductance. Use Value: Symmetric clamping ensures equal protection for both differential lines without polarity constraints - simplifies layout and BOM. |
Use Scenario: Protecting RS-485 transceivers in base station remote radio units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS staged after gas discharge tube (GDT) primary protection, handling residual fast-rising energy. Use Value: 20.6 A IPPM capability complements upstream GDT coordination; 150 °C TJ rating supports operation in sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-E3/52 | Same SMB package, 24 V VWM, but rated for 600 W PPPM (vs. 800 W) and 15.4 A IPPM (vs. 20.6 A); commercial grade only (not AEC-Q101). | Lacks automotive qualification; lower surge margin reduces margin for ISO 7637-2 compliance in harsh environments. | Select when cost sensitivity outweighs AEC-Q101 requirement and surge threat level is limited to IEC 61000-4-2/4-4. |
| SMCJ24CA-13-F | SMC (DO-214AB) package, same 24 V VWM and 38.9 V VC, but higher 1500 W PPPM and 32.4 A IPPM; AEC-Q101 qualified. | Larger footprint (7.11 mm × 6.22 mm) requires PCB redesign; superior thermal dissipation supports higher repetition rates. | Choose when system-level surge testing exceeds 800 W requirements or sustained pulse trains demand lower RθJA (35 °C/W typical). |
Compared with SMBJ24CA-E3/52, SMB8J24CAHE3_B/H provides higher surge robustness and automotive qualification; versus SMCJ24CA-13-F, it trades power handling for compact SMB footprint - ideal where space-constrained layouts prioritize AEC-Q101 compliance without board rework.
Availability
SMB8J24CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line interface designs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMB8J24CAHE3_B/H 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-grade validation.
The SMB8JxxCA family targets high-reliability transient suppression in space-constrained automotive and industrial systems, delivering AEC-Q101-compliant TVS performance in the smallest standardized surface-mount package.
FAQ
What is the clamping voltage of SMB8J24CAHE3_B/H at its rated peak pulse current?
The SMB8J24CAHE3_B/H has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 20.6 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream circuitry. The SMB8J24CAHE3_B/H maintains this clamping performance across its specified operating temperature range.
Is SMB8J24CAHE3_B/H suitable for automotive applications?
Yes, SMB8J24CAHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant, AEC-Q101-qualified construction. It supports under-hood and cabin applications including sensor interfaces, body control modules, and infotainment systems. The SMB8J24CAHE3_B/H undergoes rigorous stress testing per the AEC-Q101 standard, including HTGB, HTRB, and temperature cycling.
What does the "_B/H" suffix in SMB8J24CAHE3_B/H indicate?
The "_B/H" suffix in SMB8J24CAHE3_B/H specifies packaging configuration: "H" denotes 7-inch plastic tape-and-reel with 750 units per reel, and "B" indicates the revision level of the manufacturing process or test flow per Vishay's internal documentation. This ordering code aligns with Vishay's preferred package coding system and ensures traceability to AEC-Q101 qualification data for the SMB8J24CAHE3_B/H batch.
How does SMB8J24CAHE3_B/H differ from unidirectional variants like SMB10J24AHE3_B/H?
SMB8J24CAHE3_B/H is bidirectional with symmetrical clamping for AC or floating lines, whereas SMB10J24AHE3_B/H is unidirectional and requires correct cathode orientation. The SMB8J24CAHE3_B/H offers 800 W PPPM and 20.6 A IPPM, while the unidirectional SMB10J24AHE3_B/H delivers 1000 W PPPM and 25.7 A IPPM - reflecting higher surge capacity in one polarity. Both share identical VWM (24 V) and VC (38.9 V), but only SMB8J24CAHE3_B/H supports polarity-agnostic placement.
What is the thermal resistance of SMB8J24CAHE3_B/H under standard mounting conditions?
The SMB8J24CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the Vishay datasheet. Its junction-to-lead resistance (RθJL) is 20 °C/W. These values assume compliant PCB layout and reflow profile; actual thermal performance of SMB8J24CAHE3_B/H depends on board copper area, airflow, and adjacent heat sources.
SMB8J24CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMB8J24CAHE3_B/H FAQ
1.How can I place an order for SMB8J24CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CAHE3_B/H 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 SMB8J24CAHE3_B/H reliable?
The price and inventory of SMB8J24CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J24CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J24CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CAHE3_B/H?
SMB8J24CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CAHE3_B/H 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 SMB8J24CAHE3_B/H?
For technical support, including SMB8J24CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J24CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J24CAHE3_B/H 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 SMB8J24CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J24CAHE3_B/H?
All SMB8J24CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CAHE3_B/H, 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 SMB8J24CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J24CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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