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Vishay General Semiconductor - Diodes Division SMBJ15CAHE3_A/H
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- Part No.:
- SMBJ15CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHE3_A/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,964
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Product details
Overview
SMBJ15CAHE3_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 power and signal lines. It features a 15 V standoff voltage (VWM), 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform), commonly deployed to protect MOSFETs and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ15CAHE3_A/H datasheet, SMBJ15CAHE3_A/H pinout, SMBJ15CAHE3_A/H application, or SMBJ15CAHE3_A/H equivalent, key selection considerations include bidirectional surge suppression capability, AEC-Q101 qualification status, low clamping ratio (VC/VWM = 1.63), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1 ps) and stable VBR (16.7–18.5 V at 1 mA), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB pad design for sustained 5.0 W power dissipation.
The SMBJ15CAHE3_A/H meets MSL Level 1 per J-STD-020, supports lead-free reflow up to 260 °C peak, and is qualified to AEC-Q101 for automotive applications. Its 1.0 μA max reverse leakage at VWM ensures minimal standby power loss in always-on sensor circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above nominal rail voltage. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamped voltage during 600 W transient; limits stress on downstream ICs like microcontrollers or ADCs. |
| PPPM | 600 W (10/1000 μs) - Peak surge energy handling capacity; suitable for lightning-induced surges and inductive switch-off spikes. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm footprint; compatible with JEDEC-standard pick-and-place equipment. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative-going transients; connects to protected line or ground return path. |
| Cathode | Transient current entry (positive polarity) | Accepts reverse surge current during positive-going transients; symmetric conduction enables bidirectional protection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive ECUs without degradation. |
| AEC-Q101 qualification | Validates long-term reliability for automotive body control modules, ADAS sensors, and infotainment power rails. |
| Low clamping ratio (1.63) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V or 5 V logic interfacing with 12 V/24 V systems. |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking; reduces manufacturing overhead in high-volume SMT lines. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from BLDC motor windings. IC Role / Device Role / Timing Role: Voltage clamping element placed across MOSFET source-drain or op-amp inputs. Use Value: Limits transient overshoot to ≤24.4 V, preventing latch-up or oxide breakdown in 30 V-rated gate drivers. |
Use Scenario: Surge suppression on LIN bus lines and power supply inputs of door module ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS connected between LIN signal and ground, or VBAT and chassis ground. Use Value: Withstands ISO 16750-2 load dump pulses and meets EMC immunity requirements per CISPR 25 Class 5. |
| Consumer Sensor Hubs | Telecom Power Interfaces |
|
Use Scenario: ESD and surge protection for I²C/SPI lines connecting environmental sensors to MCU in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector or IC pin to minimize stub length. Use Value: 1.0 μA leakage at 15 V preserves battery life in always-on IoT nodes; fast response prevents data corruption. |
Use Scenario: Secondary-side overvoltage protection on 48 V DC power inputs of PoE-powered network switches. IC Role / Device Role / Timing Role: Clamp device installed between PSE output and DC-DC converter input stage. Use Value: 24.4 V clamping ensures downstream 36 V-rated converters remain within absolute maximum ratings during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/52 | Commercial-grade version; same electrical specs but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC compliance is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not critical. |
| SMCJ15CAHE3_A/H | Same VWM/VC specs but in larger SMC (DO-214AB) package with 1500 W PPPM. | Higher surge rating suits applications exposed to repeated heavy-duty transients (e.g., factory automation PLCs). | Choose when system-level surge testing exceeds 600 W or board layout allows larger 7.11 mm × 6.22 mm footprint. |
Compared with SMBJ15CA-E3/52, the SMBJ15CAHE3_A/H adds AEC-Q101 qualification for automotive use; compared with SMCJ15CAHE3_A/H, it trades surge margin for compact SMB footprint-ideal for space-constrained ECUs requiring certified reliability.
Availability
SMBJ15CAHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer sensor hubs requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SMBJ15CAHE3_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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets robust transient suppression in harsh environments-designed for automotive, industrial, and telecom systems where failure tolerance and surge resilience are mission-critical.
FAQ
What does the "CA" suffix indicate in SMBJ15CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ15CAHE3_A/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ15A), it has no cathode marking and functions identically in either polarity-essential for protecting AC-coupled or floating signal paths without polarity constraints.
Is SMBJ15CAHE3_A/H suitable for protecting 3.3 V logic interfaces?
No-SMBJ15CAHE3_A/H is not appropriate for direct 3.3 V rail protection because its 15 V standoff voltage (VWM) exceeds typical 3.3 V system margins. It is intended for higher-voltage domains such as 12 V/24 V automotive supplies or 15 V industrial rails. For 3.3 V logic, lower-VWM TVS devices like SMAJ3.3CA or ESD5Z3.3T1G are recommended.
How does the AEC-Q101 qualification impact SMBJ15CAHE3_A/H usage?
AEC-Q101 qualification certifies SMBJ15CAHE3_A/H for automotive electronic systems, confirming performance across -55 °C to +150 °C, resistance to mechanical shock/vibration, and reliability under accelerated stress tests (HTGB, H3TRB, TC). This enables use in engine control units, lighting modules, and ADAS sensors without additional qualification effort.
What is the maximum PCB copper pad size recommended for SMBJ15CAHE3_A/H thermal management?
The datasheet specifies thermal derating based on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for SMBJ15CAHE3_A/H. Larger pads improve heat dissipation but do not alter the rated 5.0 W power dissipation at TA = 50 °C. Exceeding this pad size yields diminishing returns due to the device's intrinsic RθJA of 100 °C/W.
Can SMBJ15CAHE3_A/H replace SMBJ15A in an existing design?
No-SMBJ15CAHE3_A/H cannot directly replace unidirectional SMBJ15A without circuit review. While both share identical VWM, VBR, and VC, the bidirectional SMBJ15CAHE3_A/H conducts in both directions, potentially causing unintended current paths in DC-biased circuits. Replacement requires verifying polarity independence in the target application.
SMBJ15CAHE3_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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- 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)
SMBJ15CAHE3_A/H FAQ
1.How can I place an order for SMBJ15CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHE3_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 SMBJ15CAHE3_A/H reliable?
The price and inventory of SMBJ15CAHE3_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 SMBJ15CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHE3_A/H?
SMBJ15CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHE3_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 SMBJ15CAHE3_A/H?
For technical support, including SMBJ15CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ15CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHE3_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 SMBJ15CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHE3_A/H?
All SMBJ15CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHE3_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 SMBJ15CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ15CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHE3_A/H Tags
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