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Vishay General Semiconductor - Diodes Division SMBJ24AHE3_B/I
- Part No.:
- SMBJ24AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AHE3_B/I.pdf
- Description:
- 600W,24V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,611
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Product details
Overview
SMBJ24AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail conditioning.
For engineers reviewing the SMBJ24AHE3_B/I datasheet, SMBJ24AHE3_B/I pinout, SMBJ24AHE3_B/I application, or SMBJ24AHE3_B/I equivalent, this AEC-Q101 qualified TVS offers verified surge immunity for 12 V/24 V automotive subsystems, robust reverse leakage (<1.0 µA at VWM), low thermal resistance (RθJL = 20 °C/W), and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 µA leakage at 24 V), but triggers into low-impedance conduction when transient voltage exceeds its 26.7 V minimum breakdown threshold. Its junction structure uses glass-passivated silicon to ensure stable VBR tolerance (±5%) and fast response time (<1.0 ns).
Thermally, it sustains 150 °C maximum junction temperature with 100 °C/W junction-to-ambient resistance on standard 0.2" × 0.2" copper pads, and delivers 100 A non-repetitive forward surge capability (8.3 ms half-sine) - enabling reliable protection of MOSFET gates and microcontroller I/O against load dump and inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse operating voltage before significant leakage begins; sets safe margin below system nominal voltage. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed minimum/maximum clamping initiation range; ensures predictable turn-on across temperature and lot variation. |
| VC (Clamping Voltage) | 38.9 V at 15.4 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; defines actual stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized surge waveform; validates suitability for ISO 7637-2 Pulse 1/2a/5a compliance testing. |
| IPPM (Peak Pulse Current) | 15.4 A - Maximum transient current the device safely diverts without degradation; directly tied to PCB trace width and fuse coordination. |
| TJmax | 150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive environments with minimal derating. |
| RθJL | 20 °C/W - Low junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper, critical for repetitive surge handling. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or lower-potential rail; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to the line being protected (e.g., 24 V supply or CAN_H); blocks DC but conducts surges to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, body electronics, and ADAS modules. |
| 600 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Level III/IV and IEC 61000-4-5 Line-to-Line surge requirements without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V MCU I/O below 40 V during 15 A transients. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow without moisture sensitivity concerns - eliminates bake requirements in high-volume SMT lines. |
| Glass-passivated junction | Ensures stable leakage and breakdown parameters over 10+ years in humid industrial environments (85 °C/85% RH). |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protecting 24 V sensor supply lines (e.g., Hall effect, pressure sensors) from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between 24 V rail and chassis ground. Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or gate oxide damage in connected ASICs and microcontrollers. |
Use Scenario: Safeguarding 24 V DC digital input channels against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary front-end surge absorber ahead of optocoupler or Schmitt trigger input stage. Use Value: Absorbs up to 600 W for 1 ms without failure, eliminating need for additional RC snubbers or gas discharge tubes. |
| Telecom Power Supply OVP | Motor Drive Gate Driver Protection |
|
Use Scenario: Overvoltage protection on secondary-side 24 V bias rails feeding PoE controllers and PHYs. IC Role / Device Role / Timing Role: Standoff-clamp TVS parallel to bulk capacitor, triggered only during fault conditions. Use Value: Maintains <1.0 µA leakage at 24 V, avoiding unnecessary quiescent current drain while providing sub-40 V clamping. |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Clamping diode from gate to source, limiting dV/dt-induced overshoot during turn-off. Use Value: Responds in <1 ns to suppress >100 V spikes, preserving gate oxide integrity and preventing false turn-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHM3_B/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No difference in circuit function or layout - selected only where halogen-free compliance is mandated (e.g., EU medical devices). | Choose SMBJ24AHM3_B/I when RoHS + halogen-free certification is required; otherwise SMBJ24AHE3_B/I suffices. |
| SMCJ24AHE3_A/H | Higher-power 1500 W version in larger SMC (DO-214AB) package; VWM = 24 V, VC = 39.4 V at 38.9 A. | Used where higher surge repetition rate or longer duration transients (e.g., ISO 16750-2) demand greater energy handling. | Select SMCJ24AHE3_A/H only if test profiles exceed 600 W single-pulse limits; requires PCB footprint change. |
Compared with SMBJ24AHM3_B/I, SMBJ24AHE3_B/I offers identical protection performance with standard RoHS compliance; versus SMCJ24AHE3_A/H, it trades lower surge capacity for compact SMB footprint and tighter board space utilization.
Availability
SMBJ24AHE3_B/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power rail conditioning requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ24AHE3_B/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMBJ series was engineered specifically for robust, surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low clamping ratio, and MSL Level 1 reflow compatibility.
FAQ
What is the maximum clamping voltage of SMBJ24AHE3_B/I under a 10/1000 µs surge?
The SMBJ24AHE3_B/I has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current with a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees the protected circuit will not experience more than 38.9 V during such transients - critical for safeguarding 3.3 V or 5 V logic interfaces connected to 24 V rails. The SMBJ24AHE3_B/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ24AHE3_B/I suitable for automotive applications?
Yes, SMBJ24AHE3_B/I is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility (260 °C peak), and validated performance across -55 °C to +150 °C junction temperature. It meets key automotive surge standards including ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump), making it appropriate for BCMs, ADAS sensors, and infotainment power supplies. The "HE3" suffix confirms its AEC-Q101 status.
How does SMBJ24AHE3_B/I differ from bidirectional variants like SMBJ24CA?
SMBJ24AHE3_B/I is unidirectional, with polarity marked by a cathode band and intended for DC line protection (e.g., 24 V supply to ground). In contrast, SMBJ24CA is bidirectional - symmetrical in both directions, no polarity marking, and used for AC or differential signal lines like RS-485 or CAN bus. Their VWM and VC values differ: SMBJ24CA has VWM = 24 V but clamps at ±38.9 V, whereas SMBJ24AHE3_B/I clamps only in reverse bias. Using SMBJ24AHE3_B/I on AC lines would cause forward conduction and failure.
What is the thermal resistance from junction to lead (RθJL) for SMBJ24AHE3_B/I?
The SMBJ24AHE3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured per JEDEC JESD51-14. This low value enables efficient heat transfer from the silicon die to the PCB copper via the leads, supporting repetitive surge handling and sustained power dissipation. When mounted on 0.2" × 0.2" copper pads, its RθJA is 100 °C/W - allowing continuous 5.0 W power dissipation at 50 °C ambient. This thermal profile is essential for designs requiring multiple surge events without thermal runaway.
Does SMBJ24AHE3_B/I require a heatsink for standard operation?
No, SMBJ24AHE3_B/I does not require an external heatsink for standard transient suppression duty. Its 5.0 W steady-state power dissipation rating and 100 °C/W junction-to-ambient thermal resistance are specified for mounting on minimum recommended 0.2" × 0.2" copper pads - sufficient for most automotive and industrial applications. Heatsinking becomes relevant only in rare cases involving high-frequency repetitive surges (>1 Hz) or ambient temperatures exceeding 85 °C, where junction temperature must stay below 150 °C. For typical 10/1000 µs single-event protection, PCB copper acts as the primary thermal path.
SMBJ24AHE3_B/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:
- 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)
SMBJ24AHE3_B/I FAQ
1.How can I place an order for SMBJ24AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AHE3_B/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 SMBJ24AHE3_B/I reliable?
The price and inventory of SMBJ24AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ24AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AHE3_B/I?
SMBJ24AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AHE3_B/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 SMBJ24AHE3_B/I?
For technical support, including SMBJ24AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ24AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ24AHE3_B/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 SMBJ24AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ24AHE3_B/I?
All SMBJ24AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AHE3_B/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 SMBJ24AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ24AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24AHE3_B/I Tags
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