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Vishay General Semiconductor - Diodes Division SMBJ24D-M3/H
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- Part No.:
- SMBJ24D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24D-M3/H.pdf
- Description:
- TVS DIODE 24VWM 38.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,814
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Product details
Overview
SMBJ24D-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal 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, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ24D-M3/H datasheet, SMBJ24D-M3/H pinout, SMBJ24D-M3/H application, or SMBJ24D-M3/H equivalent, key selection criteria include unidirectional polarity, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction suitable for automated SMT assembly.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR to limit transient energy. Its 20 °C/W junction-to-mount thermal resistance enables effective heat dissipation when soldered to minimum recommended PCB copper pads (5.0 mm × 5.0 mm).
The SMBJ24D-M3/H delivers 38.4 V clamping voltage at 15.6 A IPPM under 10/1000 μs surge, with 125 °C/W junction-to-ambient thermal resistance in free-air conditions and a maximum operating junction temperature of +150 °C - supporting robust protection in ambient temperatures up to +125 °C after derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 24 V - maximum continuous reverse working voltage before significant leakage begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 27.1–29.1 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC (Clamping) | 38.4 V at 15.6 A - limits voltage seen by downstream components during 600 W transient events |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform, enabling protection against IEC 61000-4-5 Level 4 surges |
| ID (Leakage) | <0.5 μA at 24 V - minimizes standby power loss and avoids false triggering in high-impedance circuits |
| TJ max | +150 °C - supports operation in under-hood automotive, industrial motor drives, and enclosed power converters |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length; compatible with J-STD-020 reflow profiles |
Pinout & Package
SMBJ24D-M3/H uses a 2-terminal SMB (DO-214AA) package with unidirectional polarity: the cathode band denotes the cathode terminal. The device has no internal circuitry beyond the PN junction; terminals are optimized for low-inductance transient response and high-current surge conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; forms return path during clamping conduction |
| Cathode (banded end) | Protected line interface | Connected to the line being protected (e.g., 24 V supply rail); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise clamping threshold control without design margin inflation - reduces risk of premature conduction or insufficient protection |
| 600 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment and telecom infrastructure |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without baking or special handling - lowers manufacturing cost and cycle time |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance for EU, China, and Japan markets; meets JESD201 Class 2 whisker resistance |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive switch-off), improving system-level robustness |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and ground to clamp transients before they reach DC/DC converter ICs and microcontrollers. Use Value: Clamps 15.6 A surge to ≤38.4 V within nanoseconds, preventing latch-up or gate oxide damage in downstream SiC MOSFET drivers and LDO regulators. |
Use Scenario: LIN bus line and 12 V/24 V auxiliary power inputs in BCM exposed to ISO 7637-2 pulses and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS on each protected line, leveraging 24 V VWM to avoid interference during normal operation while responding to >27 V transients. Use Value: Sub-0.5 μA leakage preserves battery drain budget; 38.4 V clamping protects LIN transceivers and CAN FD PHYs from destructive overvoltage. |
| Telecom Remote Radio Unit (RRU) | Factory Automation Sensor Interface |
Use Scenario: 24 V DC power feed to outdoor RRU enclosures subject to lightning-induced surges on PoE-like distribution lines. IC Role / Device Role / Timing Role: Primary front-end TVS on DC input, coordinated with secondary GDT and MOV stages in multi-stage protection network. Use Value: 600 W PPPM rating sustains repeated 10/1000 μs surges without degradation; SMB footprint allows dense layout near connector entry point. |
Use Scenario: Analog 4–20 mA current loop and digital IO lines connecting PLC I/O modules to proximity sensors in dusty, high-noise factory environments. IC Role / Device Role / Timing Role: Point-of-entry TVS on each signal line, selected for 24 V compatibility and low capacitance to preserve signal integrity. Use Value: Tight VBR tolerance ensures consistent clamping across temperature; DO-214AA package withstands mechanical vibration and thermal cycling in harsh industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-M3/5B (Vishay) | Bidirectional variant with same VWM (24 V), but symmetric clamping in both polarities; VC = 38.4 V at ±15.6 A | Required where AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN) need protection without polarity assumptions | Select SMBJ24A-M3/5B only if bidirectional clamping is required; SMBJ24D-M3/H is optimal for DC rails with defined polarity |
| SMCJ24A (ON Semiconductor) | Larger SMC (DO-214AB) package; same 24 V VWM, but higher 1500 W PPPM rating and 50 A IPPM capability | Used where higher surge energy handling is mandated (e.g., EN 61000-4-5 Level 5), accepting larger board area and higher cost | Choose SMBJ24D-M3/H for space-constrained 600 W applications; upgrade to SMCJ24A only when validated surge levels exceed 15.6 A |
Compared with SMBJ24A-M3/5B and SMCJ24A, the SMBJ24D-M3/H offers the optimal balance of compact SMB footprint, precise 24 V unidirectional clamping, and production-ready M3 halogen-free compliance - making it ideal for high-volume industrial and automotive control modules where board space and leakage current are critical constraints.
Availability
SMBJ24D-M3/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom remote radio units requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ24D-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 optimization.
The SMBJ series was engineered for high-reliability transient suppression in space-constrained SMT designs, targeting industrial automation, automotive subsystems, and communications infrastructure where consistent clamping performance and manufacturability are essential.
FAQ
What is the maximum clamping voltage of SMBJ24D-M3/H at its rated peak pulse current?
The SMBJ24D-M3/H has a maximum clamping voltage (VC) of 38.4 V at 15.6 A peak pulse current (IPPM), measured under the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ24D-M3/H maintains this clamping performance with minimal variation due to its tight VBR tolerance and low dynamic impedance.
Is SMBJ24D-M3/H suitable for protecting 24 V automotive power rails?
Yes, SMBJ24D-M3/H is widely deployed for 24 V automotive power rail protection, including body control modules and ADAS domain controllers. Its 24 V stand-off voltage (VWM) provides adequate margin above nominal 24 V systems, while its 27.1–29.1 V breakdown range and 38.4 V clamping ensure reliable response to ISO 7637-2 pulse 1 (load dump) and pulse 3a/b (switching transients). The SMBJ24D-M3/H also meets AEC-Q101 stress test requirements when qualified per Vishay's automotive-grade variants.
Does SMBJ24D-M3/H have a bidirectional version?
Yes - the bidirectional counterpart is SMBJ24CD-M3/H, which features identical electrical ratings (24 V VWM, 38.4 V VC) but symmetrical clamping in both forward and reverse directions. Unlike the unidirectional SMBJ24D-M3/H, SMBJ24CD-M3/H has no cathode band and is used on AC-coupled or polarity-agnostic lines such as RS-485, CAN, or audio interfaces. The "CD" suffix explicitly denotes bidirectional functionality, and the two parts are not interchangeable without circuit review.
What is the thermal resistance and power derating behavior of SMBJ24D-M3/H?
SMBJ24D-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W on standard FR-4 PCB with minimum pad layout, and 100 °C/W on 5.0 mm × 5.0 mm copper pads. Its steady-state power dissipation is rated at 1.0 W at TA = 25 °C and derates linearly to zero at TA = 150 °C. For continuous operation, designers must apply the derating curve in Figure 5 of Vishay document 87606 - the SMBJ24D-M3/H remains functional up to TJ = 150 °C, but sustained power must be reduced above 25 °C ambient.
How does the M3 suffix affect the material composition and reliability of SMBJ24D-M3/H?
The M3 suffix indicates that SMBJ24D-M3/H is halogen-free, RoHS-compliant, and qualified to JESD201 Class 2 for tin whisker resistance - critical for long-life industrial and automotive applications. It uses matte tin-plated leads solderable per J-STD-002 and JESD22-B102, with molding compound meeting UL 94 V-0 flammability rating. These attributes make SMBJ24D-M3/H suitable for high-reliability deployments where regulatory compliance and intermetallic growth mitigation are mandatory.
SMBJ24D-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ24D-M3/H FAQ
1.How can I place an order for SMBJ24D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24D-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 SMBJ24D-M3/H reliable?
The price and inventory of SMBJ24D-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 SMBJ24D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ24D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24D-M3/H?
SMBJ24D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24D-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 SMBJ24D-M3/H?
For technical support, including SMBJ24D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24D-M3/H requirements.
6.How does Aetrix verify that SMBJ24D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24D-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 SMBJ24D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ24D-M3/H?
All SMBJ24D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24D-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 SMBJ24D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ24D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24D-M3/H Tags
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