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Vishay General Semiconductor - Diodes Division SMBJ24AHM3_B/H
- Part No.:
- SMBJ24AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AHM3_B/H.pdf
- Description:
- 600W,24V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ24AHM3_B/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), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 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). It protects MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive ECUs.
For engineers reviewing the SMBJ24AHM3_B/H datasheet, SMBJ24AHM3_B/H pinout, SMBJ24AHM3_B/H application, or SMBJ24AHM3_B/H equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity with cathode band marking, thermal resistance (RθJA = 100 °C/W), and AEC-Q101 qualification status indicated by HM3 suffix.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while the low incremental surge resistance minimizes voltage overshoot during transient events.
The SMBJ24AHM3_B/H is rated for -55 °C to +150 °C operating junction temperature, supports 100 A non-repetitive forward surge (IFSM), and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its halogen-free, RoHS-compliant construction (HM3 suffix) and AEC-Q101 qualification confirm suitability for automotive-grade designs requiring long-term reliability under thermal cycling and humidity stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 38.9 V at IPPM = 15.4 A - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream component survivability. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; enables robust ESD and load-dump protection. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Ultra-low leakage preserves system efficiency and prevents false triggering in high-impedance circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs PCB layout and heatsinking requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Cathode identified by a single band at one end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), compliant with JEDEC DO-214AA outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; determines unidirectional conduction path. |
| Cathode | Avalanche conduction terminal / Clamping node | Marked with band; tied to higher-potential rail (e.g., VBUS); conducts surge current to ground during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU, China RoHS, and automotive OEM material declarations. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected ICs-critical for 3.3 V/5 V logic and automotive microcontrollers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to 35 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping surges before they reach LDOs and MCU power pins. Use Value: Limits peak voltage to ≤38.9 V during 15.4 A transients, preventing latch-up or gate oxide damage in 40 V-rated power management ICs. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: TVS mounted across sensor output line and ground to absorb ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-1 ns response and 1.0 µA leakage preserve signal integrity and measurement accuracy in 16-bit ADC front-ends. |
| DC-DC Converter Input Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Shielding buck converter inputs from back-EMF spikes generated by relay switching or solenoid de-energization. IC Role / Device Role / Timing Role: TVS installed at converter input capacitor node to clamp transients before reaching controller IC and MOSFETs. Use Value: 600 W rating handles repetitive 10/1000 µs surges at 0.01% duty cycle, extending capacitor and FET lifetime in 24 V industrial systems. |
Use Scenario: Preventing gate oxide failure in half-bridge MOSFET drivers caused by Miller-induced voltage spikes during high dV/dt switching. IC Role / Device Role / Timing Role: TVS placed between gate driver output and source (for high-side) or gate and ground (for low-side) to clamp ringing. Use Value: Low clamping ratio ensures gate voltage stays within ±20 V absolute maximum rating, avoiding unintended turn-on or breakdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3_B/H | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification or AEC-Q101 qualification. | Lacks automotive qualification; suitable for consumer or industrial non-automotive use where halogen-free is not mandated. | Select SMBJ24AHE3_B/H only if AEC-Q101 and halogen-free compliance are not required. |
| SMAJ24A-M3/A | Lower 400 W PPPM rating, SMA (DO-214AC) package (smaller footprint, higher RθJA ≈ 140 °C/W), same VWM/VBR/VC. | Reduced surge handling limits use to lower-energy threats (e.g., IEC 61000-4-2 only); less thermally robust in sustained surge scenarios. | Choose SMAJ24A-M3/A only when board space is constrained and peak surge energy remains below 400 W capability. |
Compared with SMBJ24AHM3_B/H, SMBJ24AHE3_B/H omits automotive qualification and halogen-free assurance, while SMAJ24A-M3/A trades surge robustness and thermal performance for smaller size-making SMBJ24AHM3_B/H the optimal choice for AEC-Q101–mandated, high-reliability 600 W transient suppression.
Availability
SMBJ24AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and DC-DC converter input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ24AHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where robustness against load dump, ESD, and inductive switching surges is mission-critical.
FAQ
What is the clamping voltage of SMBJ24AHM3_B/H at its rated peak pulse current?
The SMBJ24AHM3_B/H has a maximum clamping voltage (VC) of 38.9 V at its specified peak pulse current (IPPM) of 15.4 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage the protected circuit will experience during a standardized surge event. The SMBJ24AHM3_B/H maintains this clamping performance across its qualified operating temperature range.
Is SMBJ24AHM3_B/H suitable for automotive applications?
Yes, SMBJ24AHM3_B/H is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code, and is explicitly rated for automotive use in engine control units, body electronics, and ADAS subsystems. Its construction meets halogen-free and RoHS requirements, and it operates reliably from -55 °C to +150 °C junction temperature-fulfilling key automotive environmental and reliability mandates.
How does the SMBJ24AHM3_B/H differ from the SMBJ24AHE3_B/H variant?
The SMBJ24AHM3_B/H differs from SMBJ24AHE3_B/H in three key ways: it is halogen-free (vs. standard RoHS), carries AEC-Q101 qualification (vs. commercial grade only), and uses a different lead finish process meeting JESD 201 Class 2 whisker resistance. Both share identical electrical parameters (VWM, VBR, VC, PPPM), but SMBJ24AHM3_B/H is designated for automotive and environmentally restricted applications where those certifications are mandatory.
What is the thermal resistance of SMBJ24AHM3_B/H, and how does it affect PCB layout?
The SMBJ24AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet; reducing pad area increases RθJA and risks exceeding TJ max = +150 °C during repetitive surges. For high-duty-cycle applications, designers should verify thermal performance using actual board stack-up and airflow conditions.
Does SMBJ24AHM3_B/H have polarity marking, and how is it identified?
Yes, SMBJ24AHM3_B/H is a unidirectional TVS diode with clear polarity marking: a single cathode band is printed on the package body at the cathode end. The anode is the opposite terminal. This marking aligns with JEDEC DO-214AA mechanical standards and must be observed during placement to ensure correct orientation-reverse installation would prevent proper clamping during overvoltage events on the intended line.
SMBJ24AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ24AHM3_B/H FAQ
1.How can I place an order for SMBJ24AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AHM3_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 SMBJ24AHM3_B/H reliable?
The price and inventory of SMBJ24AHM3_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 SMBJ24AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ24AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AHM3_B/H?
SMBJ24AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AHM3_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 SMBJ24AHM3_B/H?
For technical support, including SMBJ24AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ24AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24AHM3_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 SMBJ24AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ24AHM3_B/H?
All SMBJ24AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AHM3_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 SMBJ24AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ24AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24AHM3_B/H Tags
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