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Vishay General Semiconductor - Diodes Division SMBJ24CAHM3_B/H
- Part No.:
- SMBJ24CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CAHM3_B/H.pdf
- Description:
- 600W,24V,5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,263
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Product details
Overview
SMBJ24CAHM3_B/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 standoff voltage (VWM), 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting MOSFETs and sensor interfaces in industrial control systems.
For engineers reviewing the SMBJ24CAHM3_B/H datasheet, SMBJ24CAHM3_B/H pinout, SMBJ24CAHM3_B/H application, or SMBJ24CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.62), AEC-Q101 qualification status, and halogen-free RoHS compliance per HM3 suffix - critical for automotive-grade ESD/surge protection design-in.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature under defined PCB pad conditions.
The device responds in <1 ps to transient events and maintains clamping performance across repetitive surges at 0.01% duty cycle. Its 26.7–29.5 V breakdown voltage range (VBR at 1 mA) guarantees reliable triggering before downstream IC damage, with temperature coefficient of +0.096 %/°C ensuring predictable drift over operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal bus applications. |
| VC @ IPPM | 38.9 V - Clamped voltage during 15.4 A 10/1000 µs surge; limits stress on protected ICs to safe levels. |
| IPPM | 15.4 A - Peak surge current handling capacity under standard 10/1000 µs waveform; determines minimum trace width and fuse coordination. |
| PPPM | 600 W - Peak pulse power dissipation; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
| Compliance | AEC-Q101 qualified & halogen-free RoHS (HM3 suffix) - Meets automotive reliability requirements and environmental regulations for Tier-1 supply chains. |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional transient conduction path | No functional distinction between terminals; either terminal conducts when voltage exceeds ±VBR, enabling AC line or differential pair protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust immunity to IEC 61000-4-5 surges up to Level 4 in properly laid-out PCBs with 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs, reducing risk of gate oxide rupture in 24 V logic-level MOSFET drivers. |
| AEC-Q101 qualification (HM3 suffix) | Validates reliability for automotive body electronics, including LIN bus nodes, lighting modules, and sensor signal conditioning circuits. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing and end-of-life recycling. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking preconditioning. |
Applications
| Automotive LIN Bus Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting LIN transceiver pins against load dump and inductive switching transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to limit voltage excursions to <40 V during 100 V/50 ms load dump events. Use Value: Prevents latch-up or permanent damage to TJA1020/TJA1028 LIN transceivers by maintaining clamp voltage below absolute maximum ratings. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary transient shunt across input terminals, activated within picoseconds to divert >1 kV EFT bursts away from precision op-amps and ADC front-ends. Use Value: Maintains signal integrity during IEC 61000-4-4 Level 4 (4 kV) fast transient bursts without calibration drift or offset shift. |
| Consumer Appliance Motor Drive Protection | Telecom Power Supply Rail Clamping |
|
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across H-bridge power FETs to clamp inductive kickback exceeding 2× supply rail during PWM commutation. Use Value: Eliminates need for snubber RC networks, reducing BOM count and board space while sustaining 100,000+ motor start-stop cycles. |
Use Scenario: Guarding 24 V DC-DC converter outputs against coupling from AC mains transients in VoIP gateways and base stations. IC Role / Device Role / Timing Role: Secondary-stage clamping device downstream of primary MOVs, providing precise low-voltage overshoot suppression (<39 V) on regulated rails. Use Value: Prevents brownout resets and memory corruption in ARM-based SoCs by limiting output rail excursion to <1.6× nominal voltage. |
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_B/H | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified. | Lacks automotive qualification and halogen-free certification; suitable for industrial/commercial designs without Tier-1 requirements. | Select when AEC-Q101 and halogen-free compliance are not mandated, prioritizing cost-sensitive volume production. |
| SMAJ24CAHM3 | Lower 400 W PPPM, same VWM/VC, SMA (DO-214AC) package - smaller footprint (4.5 mm × 2.7 mm) but higher thermal resistance (140 °C/W). | Reduced surge handling; limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only) and space-constrained consumer PCBs. | Choose for compact layouts where 600 W rating is unnecessary and thermal derating can be managed via layout optimization. |
Compared with SMBJ24CAHE3_B/H, the SMBJ24CAHM3_B/H adds halogen-free materials and AEC-Q101 validation without sacrificing clamping performance; versus SMAJ24CAHM3, it delivers 50% higher surge power handling and superior thermal management in the larger SMB package - critical for mission-critical 24 V system protection.
Availability
SMBJ24CAHM3_B/H is available at Aetrix Electronics and suitable for automotive LIN bus protection, industrial PLC analog input safeguarding, consumer appliance motor drive circuits, and telecom power supply rail clamping requiring stable component supply across multi-year production cycles.
Supply support for SMBJ24CAHM3_B/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 reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom infrastructure where consistent clamping performance and long-term stability are non-negotiable.
FAQ
What is the breakdown voltage range for SMBJ24CAHM3_B/H?
The SMBJ24CAHM3_B/H has a guaranteed breakdown voltage (VBR) range of 26.7 V to 29.5 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures reliable turn-on before damaging overvoltage reaches protected circuitry, and is confirmed in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88392). The SMBJ24CAHM3_B/H maintains this specification across its full operating temperature range.
Is SMBJ24CAHM3_B/H suitable for automotive applications?
Yes, SMBJ24CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting stringent automotive reliability and environmental requirements. It is explicitly rated for use in body electronics, including LIN bus nodes and sensor interfaces, and supports junction temperatures up to +150 °C. The SMBJ24CAHM3_B/H data sheet confirms qualification per AEC-Q101 test conditions.
What is the maximum clamping voltage of SMBJ24CAHM3_B/H at rated surge current?
The SMBJ24CAHM3_B/H exhibits a maximum clamping voltage (VC) of 38.9 V at its rated peak pulse current (IPPM) of 15.4 A, tested with the standard 10/1000 µs waveform. This value is measured under specified mounting conditions (0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ24CAHM3_B/H achieves a clamping ratio of 1.62 (VC/VWM), confirming effective transient suppression.
Does SMBJ24CAHM3_B/H have polarity markings on the package?
No, SMBJ24CAHM3_B/H does not feature polarity markings because it is a bidirectional TVS diode - both terminals are functionally identical and conduct symmetrically during positive or negative overvoltage events. The SMB (DO-214AA) package for SMBJ24CAHM3_B/H omits the cathode band used on unidirectional variants, eliminating orientation constraints during placement and simplifying layout for AC-coupled or differential signal paths.
What is the thermal resistance of SMBJ24CAHM3_B/H from junction to ambient?
The SMBJ24CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value is critical for calculating allowable power dissipation at elevated ambient temperatures and is validated per JEDEC standards. For SMBJ24CAHM3_B/H, thermal performance remains stable across its -55 °C to +150 °C operating range.
SMBJ24CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for SMBJ24CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CAHM3_B/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_B/H reliable?
The price and inventory of SMBJ24CAHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ24CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CAHM3_B/H?
SMBJ24CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CAHM3_B/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_B/H?
For technical support, including SMBJ24CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ24CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24CAHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ24CAHM3_B/H?
All SMBJ24CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CAHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMBJ24CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CAHM3_B/H Tags
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