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Vishay General Semiconductor - Diodes Division SMBJ15CAHM3_B/I
- Part No.:
- SMBJ15CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHM3_B/I.pdf
- Description:
- 600W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,720
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Product details
Overview
SMBJ15CAHM3_B/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 and 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), 600 W peak pulse power (10/1000 µs), and operates across -55 °C to +150 °C junction temperature range - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ15CAHM3_B/I datasheet, SMBJ15CAHM3_B/I pinout, SMBJ15CAHM3_B/I application, or SMBJ15CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.63), AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per Vishay HM3 suffix.
Technical Context
This device implements a silicon avalanche diode structure with glass-passivated junction, enabling sub-nanosecond response to ESD and lightning-induced transients. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-dependent layout constraints in AC-coupled or differential signal paths.
Rated for 600 W peak pulse power under standardized 10/1000 µs waveform and derated above 25 °C ambient, it delivers stable clamping up to 150 °C junction temperature with thermal resistance RθJA = 100 °C/W (on 0.2" × 0.2" copper pads). The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 24.4 V at 24.6 A (10/1000 µs) - Peak voltage seen by protected circuit during surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustains transient energy without failure; validated per IEC 61000-4-5 and ISO 7637-2 standards. |
| IPPM (Peak Pulse Current) | 24.6 A - Maximum non-repetitive surge current the device can shunt while maintaining VC ≤ 24.4 V. |
| TJmax | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments without derating. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm) compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity required in layout. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; enables placement across any two-point node without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance in both directions - simplifies protection of AC, differential, or floating signals. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) when properly mounted on 5 mm × 5 mm copper pads. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, body control modules, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability - suitable for high-reliability industrial assemblies. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/85 % RH - eliminates bake requirements prior to reflow assembly. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from ESD and inductive switching noise in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or signal-to-ground to clamp transients before they reach sensitive input stages. Use Value: Limits voltage excursion to ≤24.4 V during 24.6 A surge, preventing latch-up or gate oxide damage in transceivers such as MAX1487 or ADuM1201 isolators. |
Use Scenario: Shielding Ethernet PHYs and DSL line drivers from lightning-induced surges on twisted-pair telecom infrastructure. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on line-side transformer secondary windings or data port inputs. Use Value: Clamps common-mode surges to <25 V within nanoseconds, preserving signal integrity and meeting GR-1089-CORE Level 3 immunity requirements. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding LIN bus nodes and LED driver ICs against load dump and jump-start transients in vehicle interior electronics. IC Role / Device Role / Timing Role: Bidirectional TVS connected between LIN line and chassis ground, leveraging AEC-Q101 qualification for automotive-grade reliability. Use Value: Withstands repetitive 12 V system surges up to 600 W without degradation, ensuring >15-year field life per OEM specifications. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to absorb inductive kickback energy during MOSFET/FET switching. Use Value: Dissipates 600 W pulses without thermal runaway, reducing electromagnetic interference (EMI) and extending motor driver IC lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CAHE3_B/I | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3); lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; excluded from automotive BOMs requiring halogen-free or AEC-Q101 compliance. | Select when halogen-free content or automotive qualification is not required; lower cost alternative for non-automotive designs. |
| SMAJ15CAHM3_A/I | Lower 400 W PPPM; same VWM/VC but reduced IPPM (17.4 A); SMA package (smaller footprint, higher RθJA). | Suitable for space-constrained consumer devices with lower surge exposure; not recommended for industrial or automotive Level 4 testing. | Choose for compact PCB layouts where 400 W surge handling suffices and thermal budget allows higher junction rise. |
Compared with SMBJ15CAHE3_B/I, the SMBJ15CAHM3_B/I adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ15CAHM3_A/I, it delivers 50 % higher surge power rating and superior thermal robustness in the larger SMB package.
Availability
SMBJ15CAHM3_B/I is available at Aetrix Electronics and suitable for industrial sensor interface, telecom line protection, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ15CAHM3_B/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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems demanding AEC-Q101 validation, precise clamping, and robust surge endurance.
FAQ
What does the "CA" suffix indicate in SMBJ15CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration: SMBJ15CAHM3_B/I provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., SMBJ15AHM3_B/I) that clamp only in reverse bias. This makes SMBJ15CAHM3_B/I ideal for AC-coupled lines, differential buses like RS-485, or any application where voltage polarity reversal is possible during transients.
Is SMBJ15CAHM3_B/I suitable for automotive applications?
Yes - the HM3 suffix confirms SMBJ15CAHM3_B/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It meets automotive requirements for temperature cycling, humidity resistance, and surge robustness, making it appropriate for body control modules, infotainment interfaces, and sensor nodes in passenger vehicles and commercial fleets.
What is the maximum clamping voltage of SMBJ15CAHM3_B/I at rated surge current?
The SMBJ15CAHM3_B/I has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current (IPPM) under 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 worst-case transients.
How does the SMB (DO-214AA) package of SMBJ15CAHM3_B/I compare to SMA (DO-214AC)?
The SMB package used in SMBJ15CAHM3_B/I offers 50 % higher peak pulse power (600 W vs 400 W for SMAJ variants) due to larger copper pad area and lower thermal resistance (RθJA = 100 °C/W vs ~130 °C/W for SMA). Its 5.21 mm × 4.06 mm footprint supports higher surge energy dissipation and improved long-term reliability in thermally demanding applications.
Does SMBJ15CAHM3_B/I require orientation during PCB placement?
No - SMBJ15CAHM3_B/I is a bidirectional TVS diode with no polarity marking or cathode band; both terminals are functionally identical. This eliminates orientation constraints during automated placement and simplifies layout for differential or floating signal paths, unlike unidirectional SMBJ variants which require correct cathode alignment.
SMBJ15CAHM3_B/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:
- Active
- 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_B/I FAQ
1.How can I place an order for SMBJ15CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHM3_B/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_B/I reliable?
The price and inventory of SMBJ15CAHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHM3_B/I?
SMBJ15CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHM3_B/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_B/I?
For technical support, including SMBJ15CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ15CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHM3_B/I?
All SMBJ15CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMBJ15CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHM3_B/I Tags
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