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Vishay General Semiconductor - Diodes Division SMBJ24CAHE3/52
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- Part No.:
- SMBJ24CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CAHE3/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,761
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Product details
Overview
SMBJ24CAHE3/52 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 stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed to protect MOSFET gates and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ24CAHE3/52 datasheet, SMBJ24CAHE3/52 pinout, SMBJ24CAHE3/52 application, or SMBJ24CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 µs transients at 0.01% duty cycle.
The SMBJ24CAHE3/52 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 matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and it carries AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown voltage range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamping voltage under 600 W 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity; supports robust protection against lightning-induced or inductive-switching transients. |
| IPPM | 15.4 A - Peak pulse current capability at rated clamping voltage; directly correlates with surge energy absorption (≈ 6.16 mJ). |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in high-ambient environments such as engine control units. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with 1.52 mm lead width and 2.159 mm maximum pad footprint length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current regardless of polarity; connects to line being protected. |
| Cathode | Transient current exit point (bidirectional) | Completes shunt path to ground or reference rail; symmetric with anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive applications including body electronics and infotainment power rails. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 surge test levels up to 4 kV (line-earth) when properly laid out. |
| UL 497B recognized | Qualified as a Class B telecom protector (QVGQ2 file E136766), supporting safety-certified designs. |
| MSL Level 1 | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Shunt TVS diode placed across MOSFET gate-source or op-amp input pins to clamp sub-100 ns transients. Use Value: Limits gate voltage excursion to ≤38.9 V, preventing oxide breakdown in 40 V-rated logic-level MOSFETs used in 24 V systems. |
Use Scenario: Surge suppression on LIN bus lines and LED driver outputs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional transient clamp between signal line and chassis ground, responding within <1 ps. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (75 V/350 ms) by limiting peak voltage to 38.9 V at 15.4 A. |
| Telecom Power Interfaces | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for DC-DC converters powering PoE-powered devices subjected to Ethernet cable ESD and surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24–48 V input rails upstream of primary-side controller ICs. Use Value: Absorbs 600 W surge energy while holding rail voltage below 40 V, avoiding undervoltage lockout or controller latch-up. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers) against field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) shunt element placed directly at connector interface before signal conditioning amplifier. Use Value: Clamps 1 kV EFT bursts to ≤38.9 V without distorting 10 kHz sensor bandwidth due to minimal junction capacitance. |
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-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No difference in functional use; selected where halogen-free material compliance is mandated. | Choose SMBJ24CA-M3/52 when environmental compliance requires absence of brominated flame retardants. |
| SMCJ24CAHE3/52 | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Supports higher-energy transients and better thermal dissipation; requires larger PCB area. | Choose SMCJ24CAHE3/52 when system-level surge testing exceeds IEC 61000-4-5 Level 4 (4 kV line-earth). |
Compared with SMBJ24CAHE3/52, the SMBJ24CA-M3/52 offers identical protection performance with halogen-free packaging, while the SMCJ24CAHE3/52 delivers 2.5× higher surge power handling in a physically larger footprint-making it suitable for mission-critical power rail protection where layout space permits.
Availability
SMBJ24CAHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power interfaces, and industrial sensor signal conditioning requiring stable component supply across extended production lifecycles.
Supply support for SMBJ24CAHE3/52 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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was developed for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom markets where AEC-Q101 qualification and UL recognition are mandatory.
FAQ
What is the breakdown voltage range of SMBJ24CAHE3/52?
The SMBJ24CAHE3/52 has a minimum breakdown voltage (VBR) of 26.7 V and a maximum of 29.5 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable conduction onset during overvoltage events while maintaining adequate margin above its 24 V stand-off voltage. The SMBJ24CAHE3/52 achieves this performance using a glass-passivated silicon junction optimized for stable avalanche behavior.
Is SMBJ24CAHE3/52 suitable for automotive applications?
Yes, SMBJ24CAHE3/52 is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (HE3 suffix). It meets requirements for temperature cycling, humidity bias, and mechanical shock relevant to body electronics and power distribution modules. The SMBJ24CAHE3/52 also carries UL 497B recognition (file E136766), supporting safety-compliant automotive designs.
What is the maximum clamping voltage of SMBJ24CAHE3/52 under surge conditions?
The SMBJ24CAHE3/52 exhibits a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ24CAHE3/52 achieves this with low incremental surge resistance and fast response time.
Does SMBJ24CAHE3/52 have polarity markings on the package?
No, SMBJ24CAHE3/52 is a bidirectional TVS diode and carries no cathode band or polarity marking on the SMB (DO-214AA) case. Its symmetrical construction allows installation in either orientation across the protected line and return path. This eliminates orientation errors during automated placement and simplifies layout for differential or floating signals. The SMBJ24CAHE3/52 relies on internal back-to-back diode structure rather than unidirectional polarity.
What is the thermal resistance of SMBJ24CAHE3/52, and how does it affect PCB layout?
The SMBJ24CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 board thickness and no internal plane coupling. To maintain safe junction temperatures under repetitive surges, designers should allocate adequate copper area and avoid excessive trace impedance. The SMBJ24CAHE3/52 benefits from thermal vias under pads if ambient temperatures exceed 85 °C.
SMBJ24CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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):
- 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)
SMBJ24CAHE3/52 FAQ
1.How can I place an order for SMBJ24CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CAHE3/52 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 SMBJ24CAHE3/52 reliable?
The price and inventory of SMBJ24CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ24CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CAHE3/52?
SMBJ24CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CAHE3/52 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 SMBJ24CAHE3/52?
For technical support, including SMBJ24CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ24CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ24CAHE3/52 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 SMBJ24CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ24CAHE3/52?
All SMBJ24CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CAHE3/52, 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 SMBJ24CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ24CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CAHE3/52 Tags
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