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Vishay General Semiconductor - Diodes Division SMBJ24CD-M3/H
- Part No.:
- SMBJ24CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CD-M3/H.pdf
- Description:
- TVS DIODE 24VWM 38.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:12,515
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Product details
Overview
SMBJ24CD-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 24 V standoff voltage (VWM), 27.1–29.1 V breakdown voltage (VBR at 1 mA), 38.4 V clamping voltage (VC) at 15.6 A peak pulse current, and 600 W peak pulse power rating for 10/1000 μs waveform - used to protect MOSFETs and signal lines in industrial sensor interfaces against inductive switching transients.
For engineers reviewing the SMBJ24CD-M3/H datasheet, SMBJ24CD-M3/H pinout, SMBJ24CD-M3/H application, or SMBJ24CD-M3/H equivalent, key selection criteria include bidirectional polarity, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant M3-grade construction.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients. Its silicon avalanche structure enables sub-nanosecond response time and low dynamic impedance, ensuring effective suppression of fast-rising ESD and surge events per IEC 61000-4-2 and IEC 61000-4-5.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient, with thermal resistance RθJA = 125 °C/W on minimum pad layout. It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum reverse working voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR min/max | 27.1 V / 29.1 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 38.4 V at 15.6 A - clamping voltage limits transient energy delivered to protected circuitry |
| PPPM | 600 W - peak pulse power handling for 10/1000 μs waveform supports industrial-level surge immunity |
| ID @ VWM | <0.5 μA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes |
| Package | SMB (DO-214AA) - standardized surface-mount outline enabling automated placement and IPC-compliant reflow |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; supports standard SMT assembly without dry pack or baking |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking band. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102. Mounting pad layout per Vishay recommended 5.0 mm × 5.0 mm copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in both directions; connects across protected line and ground or differential pair |
| Cathode/Anode (symmetrical) | Transient conduction path | No functional distinction; terminals interchangeable due to bidirectional architecture |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without design margin inflation |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge protection on 50 Ω source impedance lines |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, improving protection fidelity for fast transients |
| M3 suffix construction | Halogen-free, RoHS-compliant, and JESD201 Class 2 whisker-resistant - qualified for industrial-grade reliability |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial interface protection per safety-critical surge protector standards |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from load dump and relay coil flyback in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground to shunt transient energy before it reaches ADC or op-amp input stage. Use Value: Prevents latch-up or permanent damage to precision analog front-ends while maintaining <0.5 μA leakage at 24 V nominal rail. | Use Scenario: Safeguarding LIN bus transceiver I/O pins against battery reversal and alternator load dump in door module ECUs. IC Role / Device Role / Timing Role: Primary surge suppressor on LIN data line, operating symmetrically to handle both positive and negative polarity transients. Use Value: Clamps to 38.4 V within nanoseconds, limiting stress on transceiver ESD structures and preserving communication integrity during 12 V system faults. |
| Telecom Power Input Stage | Consumer Appliance Motor Drive |
Use Scenario: Front-end protection on 24 V DC input of PoE-powered network equipment exposed to lightning-induced surges on building wiring. IC Role / Device Role / Timing Role: First-line defense in DC input filter stage, absorbing up to 600 W surge energy before downstream DC-DC converter. Use Value: Enables compliance with IEC 61000-4-5 Ed. 3 surge immunity requirements without requiring oversized bulk capacitance or additional stages. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Across-motor terminals to clamp inductive kickback, preventing radiated emissions and MOSFET drain-source overvoltage. Use Value: Limits VDS stress on 30 V-rated power MOSFETs to ≤38.4 V, eliminating need for higher-voltage (and higher-RDS(on)) devices. |
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 but non-M3 grade; lacks JESD201 Class 2 whisker resistance and halogen-free certification | Approved for commercial-grade designs only; not qualified for extended-temperature industrial deployments | Select SMBJ24CD-M3/H when long-term reliability under thermal cycling and humid environments is required |
| SMCJ24CA (Littelfuse) | Same bidirectional function but larger SMC (DO-214AB) package; 1500 W PPPM, higher VC (43.5 V), and higher leakage (1.0 μA) | Used where higher surge margin is needed but PCB space allows larger footprint and thermal mass | Choose SMBJ24CD-M3/H for space-constrained layouts needing SMB footprint and tighter VBR tolerance |
Compared with SMBJ24CA-E3/52 and SMCJ24CA, SMBJ24CD-M3/H delivers tighter VBR tolerance, lower leakage, and industrial-grade M3 construction in the smallest standardized SMB package - making it optimal for high-density, long-lifecycle embedded sensor and control applications.
Availability
SMBJ24CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom power inputs, and consumer appliance motor drives requiring stable component supply across multi-year production cycles.
Supply support for SMBJ24CD-M3/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, precision, and application-specific qualification.
The SMBJ series is designed for robust transient suppression in harsh electromagnetic environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where consistent clamping performance and long-term stability are critical.
FAQ
What is the polarity configuration of SMBJ24CD-M3/H?
SMBJ24CD-M3/H is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive- and negative-polarity transients. Unlike unidirectional variants (e.g., SMBJ24D), it has no cathode band marking and functions identically regardless of terminal orientation in the circuit - essential for protecting AC-coupled or differential signal paths.
Does SMBJ24CD-M3/H meet UL safety recognition?
Yes, SMBJ24CD-M3/H is UL Recognized under file E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for signal and power line protectors. This certification validates its suitability in safety-critical telecom, industrial, and building automation applications where third-party safety approval is mandatory.
What is the maximum clamping voltage of SMBJ24CD-M3/H at rated surge current?
The maximum clamping voltage (VC) of SMBJ24CD-M3/H is 38.4 V at 15.6 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is guaranteed across temperature and lot variations, ensuring protected ICs experience no more than 38.4 V during worst-case surge events.
How does the M3 suffix affect SMBJ24CD-M3/H's reliability?
The M3 suffix on SMBJ24CD-M3/H indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and industrial-grade qualification. This ensures long-term interconnect reliability under thermal cycling and humidity exposure - unlike standard-grade variants that may degrade in extended-life embedded systems.
Can SMBJ24CD-M3/H be used in place of a unidirectional TVS like SMBJ24D?
No - SMBJ24CD-M3/H is strictly bidirectional and must not replace unidirectional devices such as SMBJ24D in DC-biased circuits (e.g., single-supply power rails), as it will conduct during normal reverse bias. Use SMBJ24CD-M3/H only where symmetrical transient protection is required, such as across differential lines or AC-coupled signals.
SMBJ24CD-M3/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:
- 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/H FAQ
1.How can I place an order for SMBJ24CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CD-M3/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 SMBJ24CD-M3/H reliable?
The price and inventory of SMBJ24CD-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ24CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CD-M3/H?
SMBJ24CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CD-M3/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 SMBJ24CD-M3/H?
For technical support, including SMBJ24CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CD-M3/H requirements.
6.How does Aetrix verify that SMBJ24CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24CD-M3/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 SMBJ24CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ24CD-M3/H?
All SMBJ24CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CD-M3/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 SMBJ24CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ24CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CD-M3/H Tags
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