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Vishay General Semiconductor - Diodes Division SMBJ24CD-M3/I
- Part No.:
- SMBJ24CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CD-M3/I.pdf
- Description:
- TVS DIODE 24VWM 38.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:189
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Product details
Overview
SMBJ24CD-M3/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 24 V stand-off voltage (VWM), 27.1–29.1 V breakdown voltage (VBR) at 1 mA, 38.4 V maximum clamping voltage (VC) at 15.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ24CD-M3/I datasheet, SMBJ24CD-M3/I pinout, SMBJ24CD-M3/I application, or SMBJ24CD-M3/I equivalent, key selection criteria include bidirectional clamping capability, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction with matte tin-plated leads.
Technical Context
This device operates as a voltage-clamping protector using avalanche breakdown to divert transient energy away from sensitive downstream circuitry. Its bidirectional symmetry enables use on AC-coupled or floating lines without polarity concerns, and its 10/1000 μs surge rating aligns with IEC 61000-4-5 Level 3/4 surge immunity requirements.
The SMBJ24CD-M3/I exhibits low incremental surge resistance and fast response time (<1 ns), ensuring effective suppression of ESD, lightning-induced surges, and inductive switching spikes. Thermal resistance junction-to-ambient is 125 °C/W on minimum pad layout, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 27.1 V / 29.1 V at 1 mA - Tight ±3.5 % tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 38.4 V at 15.6 A - Clamped voltage during 600 W transient; limits stress on protected 24 V logic or analog circuitry. |
| PPPM | 600 W (10/1000 μs) - Sustains high-energy surges typical of industrial load switching and telecom line surges. |
| ID @ VWM | <0.5 μA - Negligible leakage preserves signal integrity and battery life in always-on sensor interfaces. |
| TJ max | +150 °C - Enables deployment in under-hood automotive modules, industrial motor drives, and enclosed telecom gear. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with automated assembly; meets UL 94 V-0 flammability. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode band; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal serves as input/output; bidirectional conduction allows placement on AC or floating lines without orientation constraints. |
| Cathode/Anode (symmetrical) | Clamping node | Both terminals clamp equally to ±38.4 V during surge events; eliminates need for polarity-aware routing or silkscreen marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential pairs, AC signal paths, and ungrounded bus lines without polarity risk. |
| ±3.5 % VBR tolerance | Reduces design margin overhead and improves consistency in multi-channel protection schemes across PCBs. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - simplifies manufacturing and eliminates bake requirements. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration standards and JESD201 Class 2 whisker resistance for long-term reliability. |
| 600 W peak pulse power | Supports IEC 61000-4-5 2 Ω/12 Ω coupling network testing at 1 kV open-circuit voltage without degradation. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
|
Use Scenario: Protecting gate drivers and position sensor signal lines from inductive kickback in BLDC motor inverters. IC Role / Device Role / Timing Role: Bidirectional TVS placed across encoder differential outputs and half-bridge gate drive traces. Use Value: Limits transient voltage to ≤38.4 V, preventing latch-up or oxide damage in 3.3 V/5 V interface ICs while surviving repetitive 600 W surges. |
Use Scenario: Shielding LIN bus transceivers and ambient light sensor inputs from battery dump and load-dump events. IC Role / Device Role / Timing Role: Standoff-rated clamping device on LIN data line and sensor analog output pins. Use Value: Maintains <0.5 μA leakage at 12 V system level, preserving microamp-level sleep current budgets in body control modules. |
| Telecom Power Feeds | Consumer IoT Sensor Hubs |
|
Use Scenario: Safeguarding PoE-powered Ethernet PHYs and DC-DC converter inputs against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary surge clamp on secondary-side 24 V bias rails and data line pairs. Use Value: Delivers 600 W clamping with 38.4 V VC, enabling compliance with GR-1089-CORE Section 4.5.2 surge immunity requirements. |
Use Scenario: Securing I²C and analog sensor inputs (e.g., temperature, humidity) in battery-operated smart home hubs. IC Role / Device Role / Timing Role: Low-leakage bidirectional suppressor on sensor interface lines adjacent to MCU GPIOs. Use Value: Prevents false triggering and ADC offset drift by limiting transients to sub-40 V levels while adding negligible quiescent load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA-E3/52 (Vishay) | Same VWM/VBR/VC specs; differs only in packaging (tape-and-reel vs. bulk) and M3 suffix omission - not halogen-free or whisker-tested. | Lacks JESD201 Class 2 whisker resistance and halogen-free certification; unsuitable for automotive or high-reliability industrial programs. | Select SMBJ24CD-M3/I when traceable sourcing, RoHS/halogen-free compliance, and whisker resistance are required. |
| 1.5SMC24CA (ON Semiconductor) | Same SMB package and 24 V bidirectional rating, but 1.5 kW peak power (10/1000 μs); higher VC = 39.4 V at 15.2 A. | Higher clamping voltage may exceed safe margins for 3.3 V logic; better suited for 24–48 V power rail protection than signal lines. | Choose SMBJ24CD-M3/I for tighter VBR tolerance (±3.5 % vs. ±5 %), lower VC, and guaranteed MSL Level 1 process compatibility. |
Compared with SMBJ24CA-E3/52, SMBJ24CD-M3/I adds halogen-free construction and whisker resistance without sacrificing electrical performance; versus 1.5SMC24CA, it offers superior VBR precision and lower clamping voltage-critical for protecting low-voltage signal chains.
Availability
SMBJ24CD-M3/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power feed applications requiring stable component supply, full RoHS/halogen-free compliance, and MSL Level 1 manufacturability.
Supply support for SMBJ24CD-M3/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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for robust, surface-mount transient suppression in space-constrained industrial and automotive environments where tight VBR tolerance, low leakage, and repeatable clamping are mandatory.
FAQ
What does the "CD" suffix mean in SMBJ24CD-M3/I?
The "CD" suffix in SMBJ24CD-M3/I indicates a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMBJ24D), this device clamps voltage transients in both polarities - essential for protecting AC-coupled signals, differential buses, or floating nodes where polarity is undefined. The SMBJ24CD-M3/I has no cathode band and functions identically regardless of terminal orientation.
What is the maximum clamping voltage of SMBJ24CD-M3/I and under what test condition?
The SMBJ24CD-M3/I has a maximum clamping voltage (VC) of 38.4 V, measured at a peak pulse current (IPPM) of 15.6 A using the standard 10/1000 μs double-exponential surge waveform. This value is guaranteed across temperature and production lot, and defines the upper voltage limit imposed on protected circuitry during a 600 W transient event.
Is SMBJ24CD-M3/I suitable for automotive applications?
Yes - SMBJ24CD-M3/I meets AEC-Q200 stress test requirements when qualified per Vishay's automotive-grade release, supports junction temperatures up to +150 °C, and carries the M3 suffix confirming JESD201 Class 2 whisker resistance and halogen-free construction. It is widely deployed in automotive body control modules, LIN bus nodes, and sensor interfaces where robust transient immunity is required.
How does the M3 suffix affect SMBJ24CD-M3/I's manufacturing suitability?
The M3 suffix on SMBJ24CD-M3/I certifies halogen-free molding compound, RoHS compliance, industrial-grade reliability, and passivation meeting JESD201 Class 2 whisker resistance. It also guarantees MSL Level 1 rating - allowing indefinite floor life and reflow at 260 °C peak without preconditioning - making SMBJ24CD-M3/I ideal for high-volume automated SMT lines with no special handling.
Can SMBJ24CD-M3/I replace SMBJ24CA in an existing design?
Yes, SMBJ24CD-M3/I is a direct functional replacement for SMBJ24CA with identical electrical specs (VWM = 24 V, VBR = 27.1–29.1 V, VC = 38.4 V), same SMB package, and bidirectional operation. However, SMBJ24CD-M3/I adds halogen-free materials, MSL Level 1 assurance, and whisker resistance - so it upgrades reliability without requiring PCB or schematic changes.
SMBJ24CD-M3/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):
- 24V
- Voltage - Breakdown (Min):
- 27.1V
- Voltage - Clamping (Max) @ Ipp:
- 38.4V
- Current - Peak Pulse (10/1000µs):
- 15.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ24CD-M3/I FAQ
1.How can I place an order for SMBJ24CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CD-M3/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 SMBJ24CD-M3/I reliable?
The price and inventory of SMBJ24CD-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ24CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CD-M3/I?
SMBJ24CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CD-M3/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 SMBJ24CD-M3/I?
For technical support, including SMBJ24CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CD-M3/I requirements.
6.How does Aetrix verify that SMBJ24CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ24CD-M3/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 SMBJ24CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ24CD-M3/I?
All SMBJ24CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CD-M3/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 SMBJ24CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ24CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CD-M3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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