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Vishay General Semiconductor - Diodes Division SMB8J24CAHE3/5B
- Part No.:
- SMB8J24CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CAHE3/5B.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,961
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Product details
Overview
SMB8J24CAHE3/5B 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 standoff 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 SMB8J24CAHE3/5B datasheet, SMB8J24CAHE3/5B pinout, SMB8J24CAHE3/5B application, or SMB8J24CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1.0 µA max reverse leakage at VWM, thermal resistance of 72 °C/W (junction-to-ambient), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity concerns.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB8J24CAHE3/5B supports automotive-grade reliability with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuitry |
| VBR min/max | 26.7 V / 29.5 V at IT = 1 mA - guaranteed breakdown onset window; ensures consistent clamping initiation across production lots |
| VC @ IPPM | 38.9 V at 20.6 A - clamped voltage under 10/1000 µs surge; determines worst-case overvoltage seen by downstream ICs |
| PPPM | 800 W - peak pulse power handling with 10/1000 µs waveform; quantifies single-event surge energy absorption capacity |
| ID @ VWM | 1.0 µA max - reverse leakage at rated standoff voltage; critical for low-power sensor and battery-backed circuits |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive and industrial environments |
| RθJA | 72 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design margin |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals suitable for AC line or differential pair protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when voltage exceeds VBR |
| Cathode Band (absent) | Polarity indicator | Not applicable - bidirectional construction eliminates need for cathode marking per JEDEC DO-214AA standard |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Glass passivated junction | Enhances long-term stability and humidity resistance vs. epoxy-passivated alternatives in harsh environments |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without pre-baking; compatible with high-volume SMT assembly lines |
| Low profile SMB package | Height ≤ 2.20 mm - fits space-constrained layouts in compact ECUs and IoT edge nodes |
| Matte tin plated leads | Ensures reliable solder joint formation per J-STD-002; eliminates whisker risk per JESD 201 Class 2 |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers from load dump and ESD events in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surges before reaching PHY layer. Use Value: Maintains signal integrity under 800 W transients while adding <0.5 pF capacitance - avoids data rate degradation on 5 Mbps CAN FD links. |
Use Scenario: Safeguarding PLC digital input cards against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Primary surge suppression element across 24 V DC input terminals, coordinated with upstream fuse and series impedance. Use Value: Clamps 20.6 A surge to 38.9 V within nanoseconds, preventing latch-up or gate oxide damage in optocoupler input stages. |
| Consumer Appliance Motor Control | Telecom Power Supply Input |
Use Scenario: Suppressing commutation spikes on BLDC motor driver PCBs in smart HVAC and washing machine inverters. IC Role / Device Role / Timing Role: Secondary protection stage parallel to bulk electrolytic capacitor, absorbing fast-rising switching noise. Use Value: Withstands repetitive 10/1000 µs surges up to 800 W without parameter drift - extends system MTBF beyond 10 years. |
Use Scenario: Front-end transient suppression on 48 V telecom rectifier outputs feeding base station RF amplifiers. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via DC distribution bus. Use Value: Delivers 38.9 V clamping at 20.6 A with <1.0 µA leakage - preserves efficiency and avoids false shutdown in precision voltage regulation loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J24CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No difference in automotive or industrial use cases; selected where halogen-free BOM compliance is mandated | Choose SMB8J24CAHE3/5B for standard RoHS; select SMB8J24CA-M3/5B only when halogen-free certification is contractually required |
| SMAJ24CAHE3/A | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; lower PPPM (400 W) and higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for under-hood automotive or high-current industrial I/O | SMB8J24CAHE3/5B provides 100 % higher surge power rating and 35 % better thermal performance than SMAJ24CAHE3/A |
Compared with SMB8J24CA-M3/5B, SMB8J24CAHE3/5B offers identical protection performance with standard RoHS compliance; versus SMAJ24CAHE3/A, it delivers double the surge power handling and significantly improved thermal dissipation in the same footprint class.
Availability
SMB8J24CAHE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, AEC-Q101 validation, and high-reliability surge immunity.
Supply support for SMB8J24CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
SMB8J24CAHE3/5B belongs to Vishay's TRANSZORB® TVS family - engineered specifically for high-power-density, surface-mount surge protection in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and robust clamping are mandatory.
FAQ
What is the clamping voltage of SMB8J24CAHE3/5B under maximum rated surge current?
The SMB8J24CAHE3/5B clamps to 38.9 V when subjected to its maximum peak pulse current of 20.6 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of overvoltage imposed on protected circuitry during standardized surge events.
Is SMB8J24CAHE3/5B suitable for automotive applications?
Yes, SMB8J24CAHE3/5B is AEC-Q101 qualified and manufactured with automotive-grade process controls. Its -55 °C to +150 °C operating range, MSL Level 1 rating, and matte tin plating meet stringent requirements for engine control units, ADAS sensors, and body electronics - confirmed in Vishay Document Number 88422.
What does the "HE3" suffix indicate in SMB8J24CAHE3/5B?
The "HE3" suffix denotes RoHS-compliant construction and AEC-Q101 qualification. It distinguishes SMB8J24CAHE3/5B from commercial-grade variants (e.g., E3) and halogen-free versions (HM3), ensuring full compliance with automotive supply chain mandates and environmental regulations.
How does SMB8J24CAHE3/5B differ from unidirectional TVS diodes like SMB10J24A?
SMB8J24CAHE3/5B is bidirectional with symmetric clamping in both polarities, making it ideal for AC lines or differential signals; SMB10J24A is unidirectional and conducts only in reverse bias. SMB8J24CAHE3/5B has lower PPPM (800 W vs. 1000 W) but identical VWM, VBR, and VC ratings - trade-off optimized for balanced protection.
What PCB layout guidance applies to SMB8J24CAHE3/5B for optimal thermal and electrical performance?
Vishay specifies mounting SMB8J24CAHE3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated PPPM and RθJA = 72 °C/W. Minimum pad dimensions are 0.060" × 0.086"; avoid thermal reliefs on pads to maximize heat dissipation during surge events.
SMB8J24CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J24CAHE3/5B FAQ
1.How can I place an order for SMB8J24CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CAHE3/5B 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 SMB8J24CAHE3/5B reliable?
The price and inventory of SMB8J24CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J24CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J24CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CAHE3/5B?
SMB8J24CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CAHE3/5B 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 SMB8J24CAHE3/5B?
For technical support, including SMB8J24CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J24CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J24CAHE3/5B 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 SMB8J24CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J24CAHE3/5B?
All SMB8J24CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CAHE3/5B, 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 SMB8J24CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J24CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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