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Vishay General Semiconductor - Diodes Division SMBJ24CAHM3_A/H
- Part No.:
- SMBJ24CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CAHM3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,138
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Product details
Overview
SMBJ24CAHM3_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 signal or power lines. It features 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage at 15.4 A peak pulse current (IPPM), 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 SMBJ24CAHM3_A/H datasheet, SMBJ24CAHM3_A/H pinout, SMBJ24CAHM3_A/H application, or SMBJ24CAHM3_A/H equivalent, key selection criteria include bidirectional surge protection capability, low clamping ratio (VC/VWM = 1.62), AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement on 0.2" × 0.2" 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 ensures stable avalanche characteristics and low incremental surge resistance, enabling consistent clamping performance across repetitive transients.
The SMBJ24CAHM3_A/H delivers 600 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation up to 150 °C junction temperature in properly laid-out PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR min / max | 26.7 V / 29.5 V at 1 mA - Verified breakdown voltage range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during worst-case 600 W transient; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power rating per 10/1000 µs waveform; defines single-event surge energy absorption capacity. |
| ID @ VWM | 1.0 µA - Reverse leakage current at stand-off voltage; ensures minimal standby power loss and signal integrity. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in high-ambient industrial environments with proper thermal design. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" × 0.155" footprint; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles in bidirectional clamping; no cathode band marking required. |
| Cathode Band (absent) | Polarity indicator | Omitted per specification for bidirectional types; confirms non-polarized installation and layout flexibility. |
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 IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when mounted on recommended 5 mm × 5 mm copper pads. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for automotive and industrial end-equipment without compromising reliability. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during transients, reducing risk of downstream IC latch-up or damage. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of encoder feedback lines and gate driver control signals against inductive kickback from brushless DC motor switching. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry point to limit transient amplitude before reaching MCU GPIO or isolated gate driver inputs. Use Value: Prevents false triggering or permanent damage to 3.3 V/5 V logic interfaces by limiting surge voltage to ≤38.9 V during 15.4 A transients. |
Use Scenario: Shielding LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start induced spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to absorb ±100 V transients while maintaining signal fidelity during normal operation. Use Value: Ensures uninterrupted sensor data transmission under ISO 7637-2 Pulse 1/2/5a conditions due to fast <1 ps response time and low leakage (<1 µA). |
| Telecom Power Feeds | Consumer USB-C ESD Protection |
|
Use Scenario: Safeguarding 48 V PoE-powered Ethernet switch ports against lightning-induced surges entering via Ethernet cables. IC Role / Device Role / Timing Role: Primary surge clamp on DC input rail upstream of DC-DC converter, coordinated with secondary TVS on data lines. Use Value: Absorbs up to 600 W of surge energy without degradation, preserving system uptime and meeting IEC 61000-4-5 compliance with minimal board space. |
Use Scenario: Secondary-level protection on USB-C CC and VBUS lines after primary ESD array, targeting longer-duration transients beyond HBM/CDM limits. IC Role / Device Role / Timing Role: High-energy backup suppressor working in cascade with low-capacitance ESD diodes to handle IEC 61000-4-5 surges. Use Value: Extends system-level surge immunity beyond ±8 kV contact discharge by clamping residual energy to safe levels below IC absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CAHE3_A/H | Same electrical specs but RoHS-compliant (E3), not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial-grade industrial systems where halogen-free requirement is absent. | Select when cost sensitivity outweighs automotive compliance or halogen-free mandates. |
| SMAJ24CAHM3_A/H | Lower 400 W PPPM rating; same VWM/VC but reduced IPPM (10.3 A); smaller SMA package (DO-214AC). | Better suited for space-constrained consumer electronics with lower surge exposure. | Choose only if board layout restricts SMB footprint and system-level surge testing is ≤IEC 61000-4-5 Level 3. |
Compared with SMBJ24CAHM3_A/H, SMBJ24CAHE3_A/H offers identical clamping performance but excludes halogen-free and AEC-Q101 validation, while SMAJ24CAHM3_A/H trades 33 % lower surge capacity and smaller package size for tighter board area usage - neither is pin-compatible due to differing package outlines (SMB vs. SMA).
Availability
SMBJ24CAHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified reliability.
Supply support for SMBJ24CAHM3_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 high-reliability, high-efficiency solutions.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure resilience and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ24CAHM3_A/H at its rated peak pulse current?
The SMBJ24CAHM3_A/H has a maximum clamping voltage (VC) of 38.9 V at its rated peak pulse current (IPPM) of 15.4 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88392. The SMBJ24CAHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ24CAHM3_A/H suitable for automotive applications?
Yes, SMBJ24CAHM3_A/H is AEC-Q101 qualified and halogen-free (HM3 suffix), making it suitable for automotive applications such as body control modules, ADAS sensor interfaces, and infotainment power rails. Its bidirectional architecture and 150 °C maximum junction temperature support deployment in under-hood and cabin environments where reliability under thermal and electrical stress is mandatory. The SMBJ24CAHM3_A/H meets all stress test requirements defined in the AEC-Q101 standard.
How does the HM3 suffix affect the specifications of SMBJ24CAHM3_A/H?
The HM3 suffix on SMBJ24CAHM3_A/H indicates halogen-free, RoHS-compliant construction and AEC-Q101 qualification - it does not alter electrical parameters like VWM, VBR, or VC. All performance characteristics remain identical to non-HM3 variants; the suffix solely reflects material composition (no brominated flame retardants) and extended reliability validation. The SMBJ24CAHM3_A/H retains the same 600 W PPPM rating, 24 V stand-off, and SMB (DO-214AA) package dimensions.
What is the thermal resistance of SMBJ24CAHM3_A/H, and how does it impact PCB layout?
The SMBJ24CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation near its 150 °C TJ max, designers must allocate sufficient copper area and avoid excessive trace length between the SMBJ24CAHM3_A/H and ground planes. The SMBJ24CAHM3_A/H datasheet specifies pad layout dimensions to achieve these thermal values.
Can SMBJ24CAHM3_A/H replace unidirectional TVS diodes in existing designs?
No - SMBJ24CAHM3_A/H is strictly bidirectional and lacks polarity marking, so it cannot directly replace unidirectional TVS diodes (e.g., SMBJ24A) without verifying circuit topology. In DC-biased lines, unidirectional devices block reverse leakage more effectively, whereas SMBJ24CAHM3_A/H conducts equally in both directions. Replacing SMBJ24A with SMBJ24CAHM3_A/H may cause unintended conduction or increased standby current. Always validate signal polarity and bias conditions before substitution. The SMBJ24CAHM3_A/H is intended for AC, floating, or dual-rail applications.
SMBJ24CAHM3_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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMBJ24CAHM3_A/H FAQ
1.How can I place an order for SMBJ24CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CAHM3_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 SMBJ24CAHM3_A/H reliable?
The price and inventory of SMBJ24CAHM3_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 SMBJ24CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ24CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CAHM3_A/H?
SMBJ24CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CAHM3_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 SMBJ24CAHM3_A/H?
For technical support, including SMBJ24CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ24CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24CAHM3_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 SMBJ24CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ24CAHM3_A/H?
All SMBJ24CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CAHM3_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 SMBJ24CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ24CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CAHM3_A/H Tags
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