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Vishay General Semiconductor - Diodes Division SMBJ15CAHM3_A/I
- Part No.:
- SMBJ15CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHM3_A/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,795
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Product details
Overview
SMBJ15CAHM3_A/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), making it suitable for protecting MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the SMBJ15CAHM3_A/I datasheet, SMBJ15CAHM3_A/I pinout, SMBJ15CAHM3_A/I application, or SMBJ15CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (HM3 suffix), and AEC-Q101 qualification readiness - critical for automotive-grade board-level surge protection design.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive transients.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its fast response time (<1.0 ns) and 0.088 %/°C VBR temperature coefficient ensure reliable overvoltage suppression across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected line. |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - Verified breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamped voltage seen by downstream circuitry during 600 W transient; determines residual stress on ICs. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity. |
| IPPM | 24.6 A - Peak current the device safely shunts during standardized surge waveform; used to size PCB trace robustness. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables operation in high-ambient environments like motor drives or power supplies. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical two-terminal construction with cathode/anode terminals interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One end of the PN junction; functions as anode in forward bias, cathode in reverse bias - identical electrical role to Terminal 2. |
| Terminal 2 | Cathode (bidirectional) | Other end of the PN junction; electrically interchangeable with Terminal 1 due to symmetrical bidirectional structure. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment up to Level 4 (4 kV line-earth, 2 kV line-line). |
| Halogen-free & RoHS-compliant (HM3) | Complies with IPC-1752A material declaration standards and EU RoHS Directive 2011/65/EU Annex II substance limits. |
| AEC-Q101 qualified option | HM3 suffix indicates qualification path available; meets stress test requirements for automotive electronics (e.g., body control modules). |
| MSL Level 1 (260 °C peak) | Allows unlimited floor life and standard reflow soldering without baking; eliminates moisture-related popcorning risk. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Voltage clamping element placed across MOSFET gate-source or op-amp input pins to limit transient overshoot. Use Value: Prevents gate oxide damage and false triggering by limiting transient voltage to ≤24.4 V during 24.6 A surges. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional transient clamp on 12 V power distribution nodes feeding microcontrollers and Hall-effect sensors. Use Value: Maintains system uptime by absorbing 600 W surges without degradation, supporting AEC-Q101 reliability targets. |
| Industrial PLC I/O Modules | Consumer Appliance Control Boards |
|
Use Scenario: Input/output protection for digital and analog channels connected to field wiring subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS on terminal blocks and connector interfaces before signal conditioning circuitry. Use Value: Reduces need for secondary protection stages by clamping 10/1000 µs transients to 24.4 V with <1 ns response. |
Use Scenario: ESD and switching transient protection on touch panel interfaces, display backlight drivers, and relay coil snubbing circuits. IC Role / Device Role / Timing Role: Low-profile bidirectional clamp on 5–24 V internal power rails and communication lines (e.g., I²C, UART). Use Value: Enables compact PCB layout via SMB package while meeting IEC 61000-4-2 ±8 kV contact discharge immunity. |
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 | RoHS-compliant commercial grade (E3), not halogen-free; no AEC-Q101 qualification path. | Limited to non-automotive industrial or consumer use where halogen content and automotive qualification are not mandated. | Select when cost sensitivity outweighs halogen-free or automotive qualification requirements. |
| SAC15CA | Same VWM/VC specs but in SOD-123FL package (smaller footprint, lower IPPM = 19.2 A, PPPM = 400 W). | Suitable only for lower-energy transients; insufficient for IEC 61000-4-5 Level 4 or high-current inductive loads. | Choose only for space-constrained designs accepting reduced surge margin and no AEC-Q101 support. |
Compared with SMBJ15CA-E3/52, SMBJ15CAHM3_A/I adds halogen-free construction and AEC-Q101 qualification readiness; compared with SAC15CA, it delivers 50 % higher surge power handling and proven robustness in high-reliability industrial layouts.
Availability
SMBJ15CAHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and PLC I/O protection requiring stable component supply with halogen-free and AEC-Q101-aligned sourcing.
Supply support for SMBJ15CAHM3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and telecom infrastructure where robustness and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ15CAHM3_A/I at its rated peak pulse current?
The SMBJ15CAHM3_A/I has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 24.6 A under the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream components experience no more than 24.4 V during a full 600 W transient event. The SMBJ15CAHM3_A/I datasheet confirms this parameter in Table 1 under "ELECTRICAL CHARACTERISTICS".
Is SMBJ15CAHM3_A/I suitable for automotive applications?
Yes - the HM3 suffix denotes halogen-free, RoHS-compliant construction with an AEC-Q101 qualification path. While the base SMBJ15CAHM3_A/I is commercial-grade, Vishay provides AEC-Q101-qualified versions under ordering codes like SMBJ15CAHM3_B/I. The SMBJ15CAHM3_A/I shares identical electrical and thermal specs with qualified variants, enabling direct design-in for automotive body electronics where qualification documentation is pending.
How does the bidirectional nature of SMBJ15CAHM3_A/I affect PCB layout?
The SMBJ15CAHM3_A/I has no polarity marking and functions identically in either orientation, simplifying PCB layout for AC-coupled or floating signal lines. Unlike unidirectional TVS diodes, it eliminates the need for orientation verification during assembly and supports symmetric placement across differential pairs (e.g., CAN, RS-485). This symmetry is confirmed in the Vishay SMBJ5.0A–SMBJ188A datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
What is the maximum operating temperature for SMBJ15CAHM3_A/I?
The SMBJ15CAHM3_A/I has a maximum junction temperature (TJ) rating of +150 °C, validated per JEDEC JESD22-A108. This allows continuous operation in high-ambient environments such as motor drive enclosures or under-hood automotive locations. Derating curves in Figure 2 of the SMBJ15CAHM3_A/I datasheet show usable power dissipation down to 2.5 W at 125 °C ambient when mounted on standard 0.2" × 0.2" copper pads.
Does SMBJ15CAHM3_A/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes - SMBJ15CAHM3_A/I is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means it can be subjected to standard lead-free reflow profiles without pre-baking, and has unlimited floor life under dry pack conditions. The MSL Level 1 classification is explicitly stated in the "MECHANICAL DATA" section of the SMBJ15CAHM3_A/I datasheet.
SMBJ15CAHM3_A/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:
- 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:
- 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_A/I FAQ
1.How can I place an order for SMBJ15CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHM3_A/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_A/I reliable?
The price and inventory of SMBJ15CAHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHM3_A/I?
SMBJ15CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHM3_A/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_A/I?
For technical support, including SMBJ15CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ15CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHM3_A/I?
All SMBJ15CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ15CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHM3_A/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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