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Vishay General Semiconductor - Diodes Division SMBJ24AHM3/I
- Part No.:
- SMBJ24AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AHM3/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,019
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Product details
Overview
SMBJ24AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 on power rails and signal lines of industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ24AHM3/I datasheet, SMBJ24AHM3/I pinout, SMBJ24AHM3/I application, or SMBJ24AHM3/I equivalent, this page delivers verified electrical parameters, thermal behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance data essential for surge immunity validation in 24 V DC systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity support reflow-compatible automated assembly without preconditioning.
The SMBJ24AHM3/I is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a +0.096 %/°C temperature coefficient of VBR, enabling stable breakdown behavior across automotive and industrial ambient ranges. Thermal resistance from junction-to-lead is 20 °C/W, confirming efficient heat transfer to PCB copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin for 24 V supply rail protection. |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering above system nominal voltage while avoiding false trips. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamping voltage under 600 W 10/1000 µs surge; limits downstream IC stress to <40 V during transients. |
| PPPM | 600 W - Peak pulse power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out. |
| IPPM | 15.4 A - Peak pulse current corresponding to VC; determines minimum trace width and pad area needed for thermal survival. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with J-STD-020 reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping events. |
| Cathode | Protected line connection / Clamping node | Connected to the line being protected (e.g., 24 V rail); voltage at this terminal is clamped to ≤38.9 V during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device compliance with IEC 61000-4-5 surge test requirements up to 4 kV in properly designed layouts. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control modules and ADAS power supplies. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JEDEC JS709C; eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), reducing risk of latch-up or gate oxide damage in MOSFETs and microcontrollers. |
| MSL Level 1 (260 °C peak) | Allows direct placement into standard lead-free reflow ovens without baking or dry-pack handling - reduces manufacturing cost and complexity. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage against load dump and inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VIN and GND, absorbing >600 W surges within nanoseconds. Use Value: Limits voltage excursion to ≤38.9 V, preventing damage to upstream DC-DC controllers and downstream CAN transceivers. |
Use Scenario: Guarding LIN bus power pins and microcontroller I/O against battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12/24 V supply rail, activated only during >26.7 V overvoltage events. Use Value: Maintains system uptime by suppressing 100 A surge currents without degradation, validated per AEC-Q101 stress tests. |
| Telecom Power Feeds | Factory Automation Sensors |
|
Use Scenario: Safeguarding PoE-powered remote units from lightning-induced surges on 24–48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp at power entry point, coordinated with upstream fuses and secondary filtering. Use Value: Delivers repeatable 38.9 V clamping across 1000+ surge events, ensuring long-term reliability in outdoor telecom cabinets. |
Use Scenario: Shielding analog sensor outputs (e.g., 4–20 mA loops) from ESD and cable discharge events in robotic cells. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line with minimal loading; cathode tied to signal, anode to local ground. Use Value: Adds <1 pF junction capacitance (typ.) at zero bias, preserving signal integrity up to 100 kHz without gain error or phase shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3/I | Same electrical specs but RoHS-compliant commercial grade (not halogen-free); no AEC-Q101 qualification. | Limited to non-automotive industrial use where halogen content and automotive qualification are not mandated. | Select SMBJ24AHE3/I for cost-sensitive consumer or computing applications requiring only basic RoHS compliance. |
| SMAJ24A-M3/5B | Lower 400 W PPPM, SMA package (smaller footprint), higher VC = 38.9 V @ 10.3 A; same VWM/VBR. | Suitable for space-constrained designs with lower surge threat levels (e.g., IEC 61000-4-5 Level 2). | Choose SMAJ24A-M3/5B when board area is critical and peak surge energy does not exceed 400 W. |
Compared with SMBJ24AHM3/I, SMBJ24AHE3/I lacks halogen-free certification and automotive qualification, while SMAJ24A-M3/5B trades 33 % lower surge power and smaller size for reduced clamping margin - making SMBJ24AHM3/I the optimal choice for AEC-Q101–mandated 24 V systems demanding full 600 W immunity.
Availability
SMBJ24AHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and factory automation sensors requiring stable component supply with guaranteed long-term sourcing.
Supply support for SMBJ24AHM3/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, and protection devices with emphasis on high-reliability, high-efficiency, and application-specific performance.
The SMBJ series was engineered for rugged transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping, AEC-Q101 validation, and halogen-free compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ24AHM3/I under surge conditions?
The SMBJ24AHM3/I has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ24AHM3/I maintains this clamping performance across its full operating temperature range.
Is SMBJ24AHM3/I qualified for automotive applications?
Yes, SMBJ24AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and power distribution units. The SMBJ24AHM3/I meets all requirements for Grade 1 (−40 °C to +125 °C ambient) operation.
What does the "HM3" suffix indicate in SMBJ24AHM3/I?
The "HM3" suffix in SMBJ24AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance per EU Directive 2011/65/EU. This distinguishes it from "HE3" (AEC-Q101 + RoHS, not halogen-free) and "E3" (RoHS only). The SMBJ24AHM3/I thus satisfies stringent environmental and reliability mandates for modern automotive and industrial designs.
Can SMBJ24AHM3/I be used in bidirectional protection circuits?
No, SMBJ24AHM3/I is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ24CA). Using SMBJ24AHM3/I in bidirectional applications would result in forward conduction during negative transients, potentially causing failure. For AC-coupled or dual-polarity signal lines, select SMBJ24CA or verify polarity alignment - the SMBJ24AHM3/I must be oriented with cathode toward the protected positive rail.
What is the thermal resistance and recommended PCB layout for SMBJ24AHM3/I?
The SMBJ24AHM3/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To ensure reliable 600 W surge handling, use minimum 1.5 oz copper, thermal vias under each pad, and avoid narrow traces. The SMBJ24AHM3/I's DO-214AA outline requires 5.59 mm × 4.06 mm land pattern per Vishay's recommended mounting pad layout.
SMBJ24AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMBJ24AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AHM3/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 SMBJ24AHM3/I reliable?
The price and inventory of SMBJ24AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24AHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ24AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AHM3/I?
SMBJ24AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AHM3/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 SMBJ24AHM3/I?
For technical support, including SMBJ24AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AHM3/I requirements.
6.How does Aetrix verify that SMBJ24AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ24AHM3/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 SMBJ24AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ24AHM3/I?
All SMBJ24AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AHM3/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 SMBJ24AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ24AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24AHM3/I Tags
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