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Vishay General Semiconductor - Diodes Division SMBJ24AHM3_A/H
- Part No.:
- SMBJ24AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AHM3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,073
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Product details
Overview
SMBJ24AHM3_A/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 standoff 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ24AHM3_A/H datasheet, SMBJ24AHM3_A/H pinout, SMBJ24AHM3_A/H application, or SMBJ24AHM3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and halogen-free RoHS-compliant sourcing details for automotive-grade design-in.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protection device across DC power rails or low-speed signal paths. Its glass-passivated junction enables fast response time (<1 ps), low incremental surge resistance, and stable clamping behavior during repetitive 10/1000 µs transients up to 600 W.
The SMBJ24AHM3_A/H is rated for -55 °C to +150 °C operating junction temperature, exhibits 100 °C/W junction-to-ambient thermal resistance (RθJA), and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak - confirming suitability for automated SMT assembly without pre-baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 26.7 V / 29.5 V at IT = 1 mA - ensures reliable turn-on within defined tolerance band for consistent overvoltage protection. |
| VC @ IPPM | 38.9 V at 15.4 A - clamping voltage under full 600 W surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 600 W - peak pulse power handling capability with 10/1000 µs waveform; validates robustness against lightning-induced or inductive-switching surges. |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports protection of rectifier stages or input bridges. |
| TJ max | +150 °C - maximum junction temperature; enables operation in high-ambient environments such as engine control units or industrial motor drives. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration; conducts during forward surge events. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); avalanche breakdown occurs here when transient exceeds VWM, shunting current to anode. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of high-energy transients common in 24 V industrial control systems without thermal runaway. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body electronics and powertrain modules requiring reliability under temperature cycling and vibration. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for export to EU, China, and other regulated markets without compromising surge performance. |
| MSL Level 1, 260 °C reflow compatible | Eliminates need for moisture-sensitive handling or baking prior to PCB assembly - reduces manufacturing overhead. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, preserving margin for 3.3 V or 5 V logic-level interface components downstream. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay coils and solenoid loads in PLC output stages. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between 24 V supply rail and ground, triggered only during positive-going overvoltage events. Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or oxide breakdown in 40 V-rated MOSFETs and 3.3 V MCU GPIOs sharing the same rail. |
Use Scenario: Input protection for LIN bus transceivers and window lift motor controllers exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff clamp on 12 V/24 V battery-connected lines; responds within picoseconds to suppress spikes exceeding 24 V. Use Value: Maintains system uptime by absorbing 600 W surges without failure, meeting ISO 7637-2 Pulse 1/2/5a immunity requirements. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Surge protection on PoE-powered Ethernet switch DC inputs subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters; coordinates with MOVs for multi-stage protection. Use Value: Clamps 10/1000 µs transients to 38.9 V while maintaining <1 µA leakage at 24 V, ensuring no standby power loss in always-on systems. |
Use Scenario: Protection of microcontroller reset lines and display backlight drivers in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at VWM) unidirectional suppressor placed directly at IC pins to prevent ESD-induced resets. Use Value: Prevents false triggering of brown-out detection circuits by limiting voltage excursions to <39 V during 15.4 A surge events. |
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_A/H | Same electrical specs but RoHS-compliant commercial grade (not halogen-free); lacks AEC-Q101 qualification. | Suitable for non-automotive industrial use where halogen content is unrestricted and qualification traceability is not required. | Select when cost sensitivity outweighs halogen-free mandate or automotive qualification needs. |
| SMAJ24A-HF | Lower 400 W PPPM, SMA package (smaller footprint), higher RθJA (140 °C/W), same VWM/VC. | Better suited for space-constrained consumer boards with lower surge exposure; not recommended for 600 W industrial transients. | Choose only if board area is critical and surge threat level is confirmed ≤400 W. |
Compared with SMBJ24AHM3_A/H, the HE3 variant trades halogen-free construction and AEC-Q101 validation for lower cost, while the SMAJ24A-HF sacrifices surge robustness and thermal performance for compactness - making SMBJ24AHM3_A/H the optimal choice for automotive and high-reliability 24 V systems demanding full 600 W clamping margin.
Availability
SMBJ24AHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply with halogen-free and AEC-Q101-compliant assurance.
Supply support for SMBJ24AHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom systems where space, thermal performance, and qualification rigor are critical.
FAQ
What is the clamping voltage of SMBJ24AHM3_A/H at its rated peak pulse current?
The SMBJ24AHM3_A/H has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) under 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 a full 600 W transient event. The SMBJ24AHM3_A/H maintains this clamping performance across its qualified operating temperature range.
Is SMBJ24AHM3_A/H qualified for automotive applications?
Yes, SMBJ24AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code. This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its use in automotive body electronics, powertrain subsystems, and infotainment power rails where reliability under harsh conditions is mandatory.
What does the "HM3" suffix indicate in SMBJ24AHM3_A/H?
The "HM3" suffix in SMBJ24AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from the "HE3" (RoHS-compliant, AEC-Q101) and "E3" (RoHS-compliant, commercial grade) versions. The HM3 version satisfies both environmental compliance and automotive reliability standards without compromising electrical performance or package dimensions.
Can SMBJ24AHM3_A/H be used in bidirectional configurations?
No, SMBJ24AHM3_A/H is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SMBJ24CA). Using SMBJ24AHM3_A/H in reverse-biased AC applications would result in forward conduction and potential failure; correct polarity orientation is essential for proper clamping function.
What is the thermal resistance of SMBJ24AHM3_A/H, and how does it affect PCB layout?
SMBJ24AHM3_A/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. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid excessive trace length or isolation - especially in high-ambient environments like engine bays or enclosed industrial enclosures where SMBJ24AHM3_A/H may operate near its +150 °C TJ limit.
SMBJ24AHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ24AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AHM3_A/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_A/H reliable?
The price and inventory of SMBJ24AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ24AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AHM3_A/H?
SMBJ24AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AHM3_A/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_A/H?
For technical support, including SMBJ24AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ24AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ24AHM3_A/H?
All SMBJ24AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMBJ24AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24AHM3_A/H Tags
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