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Vishay General Semiconductor - Diodes Division SMBJ24CAHE3_A/H
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- Part No.:
- SMBJ24CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CAHE3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,350
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Product details
Overview
SMBJ24CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown range (VBR at 1 mA), 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the SMBJ24CAHE3_A/H datasheet, SMBJ24CAHE3_A/H pinout, SMBJ24CAHE3_A/H application, or SMBJ24CAHE3_A/H equivalent, this device is evaluated for bidirectional surge protection in automotive-grade (AEC-Q101 qualified), industrial control, and telecom interface circuits where low clamping voltage, fast response (<1 ps), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable leakage performance (≤1.0 µA at VWM) and robust surge handling up to 15.4 A (10/1000 µs), with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
The SMBJ24CAHE3_A/H is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It meets UL 94 V-0 flammability rating and supports automated placement due to its low-profile SMB package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse working voltage before conduction begins; defines operating margin for protected line. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 38.9 V at 15.4 A (10/1000 µs) - Peak voltage seen by downstream circuit during worst-case surge; determines protection level. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability without failure under standardized surge waveform. |
| IPPM (Peak Pulse Current) | 15.4 A - Maximum non-repetitive surge current the device safely clamps; directly linked to PCB trace sizing and layout. |
| TJmax | 150 °C - Maximum junction temperature limit; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC MS-012AC. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with cathode/anode roles interchangeable depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Both terminals serve as interchangeable conduction paths during positive or negative transients; no fixed anode/cathode designation required in layout. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without derating in standard PCB layouts. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring zero defect reliability over extended temperature and lifetime cycles. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream ICs - critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without preconditioning or special handling; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Ensures stable leakage (<1 µA) and long-term parameter stability under humidity and thermal cycling stress. |
Applications
| Industrial Motor Drive I/O Protection | Automotive Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting encoder feedback lines and analog sensor inputs in variable-frequency drives exposed to inductive kickback from contactors and relays. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching MCU ADC or isolation amplifier. Use Value: Limits induced spikes to ≤38.9 V, preventing latch-up or damage to 24 V-tolerant analog front-ends while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding LIN bus or analog pressure/temperature sensor outputs in engine control modules subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary transient suppressor on sensor harness side, operating in parallel with local RC filtering to meet AEC-Q100 stress test requirements. Use Value: Clamps 100 V/500 ms load dump events to safe levels within 1 ps response time, preserving sensor accuracy and enabling AEC-Q101 compliance. |
| Telecom Ethernet PHY Port Protection | Consumer Appliance Power Supply Feedback Loop |
|
Use Scenario: Guarding 10/100BASE-TX transformer-coupled PHY lines against ESD (IEC 61000-4-2 ±8 kV contact) and lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed after common-mode choke but before magnetics, providing differential and common-mode clamping. Use Value: Maintains <1 pF junction capacitance (typ.) to avoid signal integrity degradation at 100 MHz, while clamping ESD to <40 V. |
Use Scenario: Securing optocoupler feedback path in isolated AC/DC SMPS used in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Bidirectional clamp across secondary-side error amplifier output to prevent overvoltage during primary-side MOSFET failure or startup overshoot. Use Value: Withstands repetitive 600 W surges without parameter shift, ensuring consistent regulation loop stability over 10+ year product lifetimes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-E3/52 | No AEC-Q101 qualification; commercial-grade only; same electrical specs and SMB package. | Not suitable for automotive or safety-critical industrial deployments requiring automotive reliability validation. | Select when cost sensitivity outweighs automotive qualification requirements and ambient temperature stays ≤125 °C. |
| SMCJ24CAHE3_A/H | Higher 1500 W peak pulse power; larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); identical VWM/VC specs. | Used where higher surge margin is needed (e.g., mains-connected equipment), but requires PCB area increase and layout revision. | Choose when system-level surge testing exceeds 600 W requirements and board space permits larger footprint. |
Compared with SMBJ24CAHE3_A/H, the SMBJ24CA-E3/52 offers identical protection performance at lower cost but lacks automotive qualification, while the SMCJ24CAHE3_A/H delivers 2.5× higher surge capacity in a physically larger package - making SMBJ24CAHE3_A/H the optimal balance of AEC-Q101 compliance, compact SMB footprint, and 600 W surge handling for space-constrained automotive and industrial designs.
Availability
SMBJ24CAHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor modules, telecom PHY interfaces, and consumer appliance power supplies requiring stable component supply with automotive-grade reliability and full traceability.
Supply support for SMBJ24CAHE3_A/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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and communications infrastructure where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ24CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ24CAHE3_A/H provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ24A), it has no polarity marking and functions identically regardless of signal direction - essential for AC-coupled or differential lines like RS-485 or LIN bus.
Is SMBJ24CAHE3_A/H suitable for protecting 3.3 V logic interfaces?
Yes, SMBJ24CAHE3_A/H can protect 3.3 V logic interfaces when used with appropriate series impedance (e.g., current-limiting resistor or ferrite bead). Its 24 V stand-off voltage ensures no conduction during normal operation, while its 38.9 V clamping voltage must be coordinated with upstream current limiting to keep downstream voltage below IC absolute maximum ratings - verified in Vishay's application note AN8002.
How does the HE3 suffix affect SMBJ24CAHE3_A/H compliance status?
The "HE3" suffix in SMBJ24CAHE3_A/H indicates RoHS-compliant construction with AEC-Q101 qualification. This distinguishes it from base "E3" (RoHS-only) or "HM3" (halogen-free + RoHS) variants. The "_A/H" revision code confirms compliance with the January 2024 specification revision (Document Number: 88392), including updated thermal derating curves and MSL handling data.
What is the maximum allowable PCB pad size for SMBJ24CAHE3_A/H to achieve rated 600 W performance?
To achieve the full 600 W peak pulse power rating, SMBJ24CAHE3_A/H must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Figure 2 of the datasheet. Smaller pads reduce thermal dissipation and require derating - e.g., 0.1" × 0.1" pads limit PPPM to ~300 W at 25 °C ambient.
Does SMBJ24CAHE3_A/H have a specified junction capacitance value?
Yes, SMBJ24CAHE3_A/H exhibits typical junction capacitance of 120 pF at zero bias and 1 MHz, measured per Figure 4 in the datasheet. This value is confirmed for the entire SMBJ family and applies directly to SMBJ24CAHE3_A/H - important for high-speed signal line protection where excessive capacitance could degrade edge rates or cause reflections.
SMBJ24CAHE3_A/H 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:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ24CAHE3_A/H FAQ
1.How can I place an order for SMBJ24CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CAHE3_A/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 SMBJ24CAHE3_A/H reliable?
The price and inventory of SMBJ24CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ24CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CAHE3_A/H?
SMBJ24CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CAHE3_A/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 SMBJ24CAHE3_A/H?
For technical support, including SMBJ24CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ24CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24CAHE3_A/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 SMBJ24CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ24CAHE3_A/H?
All SMBJ24CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CAHE3_A/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 SMBJ24CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ24CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CAHE3_A/H Tags
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