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Vishay General Semiconductor - Diodes Division SMBJ15CAHM3/I
- Part No.:
- SMBJ15CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHM3/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,124
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Product details
Overview
SMBJ15CAHM3/I 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 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), used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ15CAHM3/I datasheet, SMBJ15CAHM3/I pinout, SMBJ15CAHM3/I application, or SMBJ15CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, 15 V working voltage compatibility with 3.3 V/5 V/12 V interfaces, low leakage (<1.0 µA at VWM), AEC-Q101 qualification status, and halogen-free RoHS-compliant packaging for automotive-grade reliability.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions, enabling use on AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during ESD or lightning-induced surges.
The SMBJ15CAHM3/I is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient, with thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its M3 suffix confirms halogen-free, RoHS-compliant construction and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; matches 12 V nominal bus or 15 V analog supply rails. |
| VBR min / max | 16.7 V / 18.5 V - Breakdown occurs within this range at 1 mA test current; ensures reliable triggering above VWM. |
| VC @ IPPM | 24.4 V - Clamped voltage seen by protected circuit at 24.6 A surge; limits stress on downstream 24 V-tolerant components. |
| IPPM | 24.6 A - Peak surge current handled with 10/1000 µs waveform; sufficient for IEC 61000-4-5 Level 3 (1 A–24 A) compliance testing. |
| PPPM | 600 W - Peak pulse power dissipation capacity; defines transient energy absorption limit per event. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood or enclosed industrial environments. |
| Leakage @ VWM | <1.0 µA - Reverse leakage current at 15 V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode identification requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as input/output; no DC polarity dependency - ideal for AC signal lines, differential buses, or floating grounds. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surge events up to Level 3 without derating or parallel devices. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics applications including body control modules and infotainment interfaces requiring extended temperature and reliability validation. |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance mandates for global OEMs and industrial equipment sold in EU, China, and Japan markets. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure during transients - critical for safeguarding 24 V-rated microcontrollers and interface ICs. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity handling or baking requirements. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
|
Use Scenario: Protection of gate-drive signal lines in 24 V BLDC motor inverters subjected to inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across isolated gate driver outputs to suppress >100 V transients induced by MOSFET turn-off. Use Value: Prevents gate oxide damage in half-bridge drivers by limiting transient voltage to ≤24.4 V, preserving functional safety integrity. |
Use Scenario: Surge suppression on LIN bus lines in door module ECUs exposed to load dump and battery disconnect events. IC Role / Device Role / Timing Role: Standoff voltage (15 V) aligns with LIN physical layer spec; clamps transients faster than bus timing constraints allow. Use Value: Maintains LIN communication integrity during 12 V system disturbances without protocol-level retries or frame loss. |
| Telecom Power Interface | Consumer Sensor Hub |
|
Use Scenario: Input-stage protection for 12 V PoE-powered base station radios connected to outdoor antenna feeds. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via coaxial RF port or DC feed line. Use Value: Absorbs 600 W surge energy without failure, eliminating need for secondary GDT or MOV stages in compact RF enclosure designs. |
Use Scenario: ESD protection on I²C lines linking MEMS accelerometers and environmental sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp preserves 400 kHz I²C rise/fall times and noise margin. Use Value: Passes IEC 61000-4-2 ±8 kV contact discharge without latch-up or parameter shift in connected sensor ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CAHE3/I | Same electrical specs, but RoHS-compliant (E3) instead of halogen-free (M3); no AEC-Q101 qualification. | Suitable for commercial/industrial use where automotive qualification is not required. | Select when halogen-free content is not mandated and cost optimization is prioritized over automotive compliance. |
| SMAJ15CAHM3 | Lower 400 W PPPM, same VWM/VC; SMA (DO-214AC) package - smaller footprint but lower thermal mass. | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 3+ or high-repetition surges. | Choose only if board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
Compared with SMBJ15CAHM3/I, the HE3/I variant lacks AEC-Q101 validation and halogen-free certification, while the SMAJ15CAHM3 sacrifices 33 % peak power handling and thermal robustness due to its smaller package - making SMBJ15CAHM3/I the optimal choice for automotive and high-reliability industrial deployments.
Availability
SMBJ15CAHM3/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for SMBJ15CAHM3/I 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 performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against inductive switching, ESD, and lightning surges is mission-critical.
FAQ
What is the clamping voltage of SMBJ15CAHM3/I at its rated peak pulse current?
The SMBJ15CAHM3/I has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 24.6 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected circuits experience no more than 24.4 V during surge events - critical for safeguarding 24 V-tolerant ICs and interfaces. The SMBJ15CAHM3/I maintains this clamping performance across its full operating temperature range.
Is SMBJ15CAHM3/I suitable for automotive applications?
Yes, SMBJ15CAHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay documentation. It meets automotive reliability requirements including temperature cycling, humidity testing, and mechanical shock validation. The SMBJ15CAHM3/I is specified for operation from –55 °C to +150 °C and supports under-hood and body-control module deployments where transient immunity and long-term stability are essential.
Does SMBJ15CAHM3/I require polarity-aware PCB layout?
No - SMBJ15CAHM3/I is a bidirectional TVS diode with symmetrical breakdown characteristics, meaning either terminal may connect to either side of a protected line. There is no cathode band or polarity marking on the SMB (DO-214AA) package. This simplifies layout for AC-coupled signals, differential buses like RS-485 or CAN, and floating ground architectures where polarity assignment is undefined or variable.
What is the maximum reverse leakage current of SMBJ15CAHM3/I at its standoff voltage?
The SMBJ15CAHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 15 V standoff voltage (VWM), measured at 25 °C. This ultra-low leakage prevents loading of high-impedance sensor inputs or battery-backed circuits and ensures minimal impact on standby power budgets. Leakage remains below 5 µA even at elevated temperatures up to 125 °C, as verified in Vishay's thermal derating curves.
How does the halogen-free (M3) designation affect SMBJ15CAHM3/I's manufacturing process?
The M3 suffix on SMBJ15CAHM3/I indicates halogen-free molding compound and matte tin-plated leads compliant with IEC 61249-2-21 and JEDEC J-STD-020. This eliminates brominated flame retardants and chlorine-based additives, reducing toxic gas emission during PCB rework or end-of-life incineration. The SMBJ15CAHM3/I retains full MSL Level 1 rating (260 °C peak reflow) and JESD201 Class 2 whisker resistance - ensuring no trade-off in manufacturability or reliability.
SMBJ15CAHM3/I 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):
- 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:
- 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)
SMBJ15CAHM3/I FAQ
1.How can I place an order for SMBJ15CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHM3/I 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 SMBJ15CAHM3/I reliable?
The price and inventory of SMBJ15CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHM3/I?
SMBJ15CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHM3/I 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 SMBJ15CAHM3/I?
For technical support, including SMBJ15CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHM3/I requirements.
6.How does Aetrix verify that SMBJ15CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHM3/I 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 SMBJ15CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHM3/I?
All SMBJ15CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHM3/I, 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 SMBJ15CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ15CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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