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Vishay General Semiconductor - Diodes Division SMBJ15CAHM3/H
- Part No.:
- SMBJ15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHM3/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,525
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Product details
Overview
SMBJ15CAHM3/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 signal or power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage at 24.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ15CAHM3/H datasheet, SMBJ15CAHM3/H pinout, SMBJ15CAHM3/H application, or SMBJ15CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.63×VWM), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
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 concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 15 V), while the low incremental surge resistance supports consistent clamping under repetitive transient events.
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 PCB pads. Its MSL Level 1 rating and 260 °C lead-free reflow compatibility confirm suitability for high-volume automated assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold |
| VBR min/max (Breakdown Voltage) | 16.7 V / 18.5 V at 1.0 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 24.4 V at IPPM = 24.6 A - peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity under standardized 10/1000 µs waveform; enables robust protection against lightning-induced surges |
| ID (Reverse Leakage) | ≤1.0 µA at 15 V - negligible standby current; avoids loading sensitive analog or low-power circuits |
| TJ max | 150 °C - maximum allowable junction temperature; supports operation in enclosed industrial enclosures or high-ambient environments |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; optimized for pick-and-place |
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, and meet JESD 201 Class 2 whisker test requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | Enables clamping during positive or negative transients - no DC polarity dependency required in layout |
| Cathode | Current exit terminal in forward bias; electrically identical to anode for bidirectional operation | Eliminates need for orientation verification during automated placement; simplifies PCB design for AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled interfaces (e.g., RS-485, CAN, Ethernet PHYs) without external polarity management or dual-device solutions |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-ground) surge tests when properly laid out on 0.2" × 0.2" copper pads |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - suitable for ADAS camera modules and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU; supports green manufacturing and export compliance |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without baking or special handling; reduces production line complexity and cost |
Applications
| Industrial Motor Drives | Automotive Camera Modules |
|---|---|
|
Use Scenario: Protection of gate driver signal lines against inductive kickback from IGBT/MOSFET switching in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS placed across isolated gate drive transformer secondary or digital isolator outputs. Use Value: Limits transient overshoot to ≤24.4 V, preventing latch-up or damage to 3.3 V or 5 V logic-level gate drivers without adding series impedance. |
Use Scenario: Surge suppression on FAKRA or mini-FARAK coaxial video input lines in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Primary front-end protection device mounted adjacent to connector, before ESD diode array and video amplifier. Use Value: Clamps 10/1000 µs surges up to 24.6 A while maintaining <1.0 µA leakage - preserves signal integrity for 1–3 Gbps HD video transmission. |
| Telecom Power Feeds | Consumer USB-C Power Delivery |
|
Use Scenario: Overvoltage protection on -48 V DC telecom power distribution boards exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Secondary-stage clamp after primary gas discharge tube (GDT), absorbing residual energy and limiting let-through voltage. Use Value: Achieves total clamping voltage <60 V when cascaded with GDT, meeting GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Input-side transient suppression on USB-C CC and VCONN lines in portable chargers and power banks. IC Role / Device Role / Timing Role: Standalone bidirectional suppressor on low-capacitance signal paths where unidirectional devices would require dual placement. Use Value: Provides symmetrical ±15 V standoff and 24.4 V clamping without degrading USB-C 3.0/3.1 signal rise/fall times due to absence of series capacitance penalty. |
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/H | Same electrical specs, but RoHS-compliant commercial grade (non-AEC-Q101); uses standard tin plating instead of whisker-tested matte tin | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems | Select when cost-sensitive industrial or consumer designs do not require AEC-Q101 validation or enhanced whisker resistance |
| SMAJ15CAHM3 | Lower 400 W PPPM rating; same VWM/VC but higher clamping ratio (26.5 V @ 15.2 A); SMA package (smaller footprint, lower thermal mass) | Reduced surge margin; unsuitable for IEC 61000-4-5 Level 3 or repeated surge exposure in harsh environments | Choose only for space-constrained, low-energy applications where board area is prioritized over robustness |
Compared with SMBJ15CAHE3/H, the SMBJ15CAHM3/H adds AEC-Q101 qualification and whisker-resistant terminations - critical for automotive deployment - while SMAJ15CAHM3 trades surge capability and thermal performance for smaller size, limiting use to non-critical consumer interfaces.
Availability
SMBJ15CAHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive camera modules, telecom power feeds, and consumer USB-C power delivery systems requiring stable component supply and long-term manufacturability.
Supply support for SMBJ15CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure, delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 and halogen-free variants.
FAQ
What does the "HM3" suffix indicate in SMBJ15CAHM3/H?
The HM3 suffix in SMBJ15CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It confirms suitability for automotive applications and environmentally regulated production, distinguishing it from commercial-grade E3 or HE3 variants.
Is SMBJ15CAHM3/H compatible with lead-free reflow processes?
Yes, SMBJ15CAHM3/H is rated for MSL Level 1 and supports peak reflow temperatures up to 260 °C per J-STD-020, making it fully compatible with standard lead-free soldering profiles without pre-baking. Its molding compound meets UL 94 V-0 flammability requirements.
How does the clamping voltage of SMBJ15CAHM3/H compare to its stand-off voltage?
SMBJ15CAHM3/H has a 15 V stand-off voltage (VWM) and a maximum clamping voltage (VC) of 24.4 V at 24.6 A, yielding a clamping ratio of 1.63. This tight ratio ensures protected circuits experience minimal overvoltage stress during surge events while maintaining low leakage below 15 V.
Can SMBJ15CAHM3/H be used in unidirectional configurations?
No - SMBJ15CAHM3/H is explicitly a bidirectional TVS (denoted by "CA" in the part number). It lacks polarity marking and conducts symmetrically in both directions. For unidirectional protection, select an "A"-suffixed variant such as SMBJ15AHM3/H, which includes a cathode band and forward voltage specification.
What is the recommended PCB pad layout for optimal thermal and surge performance of SMBJ15CAHM3/H?
Vishay specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for SMBJ15CAHM3/H to achieve rated 600 W peak pulse power and 100 °C/W thermal resistance. Smaller pads reduce surge capability and increase junction temperature during repetitive events.
SMBJ15CAHM3/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:
- 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/H FAQ
1.How can I place an order for SMBJ15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHM3/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 SMBJ15CAHM3/H reliable?
The price and inventory of SMBJ15CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHM3/H?
SMBJ15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHM3/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 SMBJ15CAHM3/H?
For technical support, including SMBJ15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHM3/H requirements.
6.How does Aetrix verify that SMBJ15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHM3/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 SMBJ15CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHM3/H?
All SMBJ15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHM3/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 SMBJ15CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHM3/H Tags
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