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Vishay General Semiconductor - Diodes Division SMBJ24AHE3_A/H
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- Part No.:
- SMBJ24AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AHE3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,872
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Product details
Overview
SMBJ24AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features 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), used in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the SMBJ24AHE3_A/H datasheet, SMBJ24AHE3_A/H pinout, SMBJ24AHE3_A/H application, or SMBJ24AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with DC power inputs or parallel to sensitive IC pins. Its glass-passivated junction enables fast response (<1 ns), low leakage (<1.0 µA at 24 V), and stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
The SMBJ24AHE3_A/H is rated for 100 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), exhibits +0.096 %/°C VBR temperature coefficient, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias range for protected line. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Breakdown onset range; ensures reliable triggering above VWM with margin against tolerance drift. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 10/1000 µs surge; determines max stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at rated stand-off; minimizes quiescent power loss and avoids false triggering. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.205" × 0.130" footprint; compatible with JEDEC-compliant pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction mode | Connected to ground or lower-potential node in unidirectional TVS configuration; enables clamping when cathode-side voltage exceeds VBR. |
| Cathode | Current exit point in forward conduction mode; marked with band | Connected to protected line (e.g., 24 V supply rail); reverse-biased during normal operation; conducts surge current to ground when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control units and ADAS power supplies. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) without degradation. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved moisture resistance versus epoxy-passivated alternatives - critical for long-term field reliability. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage overshoot during transient events, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without preconditioning or baking - reduces manufacturing complexity and cost in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 24 V battery-supplied ECUs exposed to load dump (ISO 16750-2) and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges before they reach PMICs and CAN transceivers. Use Value: Limits peak voltage to ≤38.9 V during 15.4 A surge, preventing overvoltage failure of 36 V-rated input stages in automotive-grade regulators. |
Use Scenario: Analog output lines (4–20 mA) from pressure sensors in factory automation systems subject to cable-induced ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted across sensor output and return, referenced to local ground, to shunt transients before reaching ADC front-end. Use Value: Sub-1 ns response and ≤1.0 µA leakage preserve signal integrity and measurement accuracy while surviving repeated ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Supply Protection |
|
Use Scenario: -48 V DC input stage of telecom base station equipment subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS installed at board edge, cathode to -48 V line, anode to system ground, providing first-line clamping before DC/DC converters. Use Value: 600 W rating and 38.9 V clamping enable compliance with GR-1089-CORE Level 3 surge immunity requirements without derating. |
Use Scenario: 24 V supply feeding H-bridge gate drivers in smart washing machine motor controllers, where relay switching induces >100 V spikes. IC Role / Device Role / Timing Role: TVS placed across motor driver VDD and GND to absorb inductive energy from flyback diodes and prevent driver IC latch-up. Use Value: 100 A IFSM rating handles worst-case turn-off surges; AEC-Q101 qualification ensures longevity under thermal cycling in sealed appliance enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct drop-in replacement where halogen-free bill-of-materials is required; no layout or qualification changes needed. |
| SMCJ24AHE3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM rating; higher thermal mass and RθJA = 35 °C/W. | Used where higher surge energy absorption or improved thermal dissipation is needed - e.g., primary-side AC/DC input protection. | Not pin-compatible; requires PCB footprint change; select only when 600 W is insufficient and board space allows larger package. |
Compared with SMBJ24AHM3_A/H, SMBJ24AHE3_A/H offers identical protection performance with standard RoHS compliance but excludes halogen-free certification; compared with SMCJ24AHE3_A/H, it provides compact size and lower cost for moderate-surge applications where 600 W suffices and space is constrained.
Availability
SMBJ24AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, AEC-Q101 qualification, and RoHS compliance.
Supply support for SMBJ24AHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ24AHE3_A/H under a 10/1000 µs surge?
The SMBJ24AHE3_A/H has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 15.4 A using the standardized 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. The SMBJ24AHE3_A/H maintains this clamping performance across its full operating temperature range and after repeated surge exposures.
Is SMBJ24AHE3_A/H suitable for automotive applications?
Yes, SMBJ24AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes stress testing for temperature cycling, high-temperature reverse bias, and surge endurance per automotive reliability standards. The SMBJ24AHE3_A/H is deployed in engine control modules, body electronics, and ADAS power supplies where 24 V rail protection against load dump and jump-start transients is required.
What does the "HE3" suffix indicate in SMBJ24AHE3_A/H?
The "HE3" suffix in SMBJ24AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" parts and halogen-free "HM3" versions. The "H" confirms automotive qualification, while "E3" specifies lead-free matte tin plating and compliance with EU RoHS Directive 2011/65/EU. The "_A/H" revision code indicates the specific manufacturing lot and packaging configuration (7" tape and reel, 750 units).
How does SMBJ24AHE3_A/H differ from bidirectional variants like SMBJ24CA?
The SMBJ24AHE3_A/H is unidirectional, meaning it conducts only when the cathode is positive relative to the anode - ideal for DC rail protection. In contrast, SMBJ24CA is bidirectional and symmetrical, conducting in both polarities, making it suitable for AC lines or data bus protection. The SMBJ24AHE3_A/H has a defined cathode band for polarity identification, whereas SMBJ24CA has no marking. Their VBR and VC values differ due to internal structure, and they are not interchangeable without circuit redesign.
What is the thermal resistance of SMBJ24AHE3_A/H, and how does it affect layout?
The SMBJ24AHE3_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, and 20 °C/W junction-to-lead (RθJL). To maintain TJ ≤ 150 °C under 5.0 W steady-state dissipation, PCB layout must provide adequate copper area and minimize trace length to ground planes. Derating is required above TA = 25 °C per Figure 2 in the datasheet. The SMBJ24AHE3_A/H's thermal performance directly impacts sustained surge repetition rate and long-term reliability.
SMBJ24AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ24AHE3_A/H FAQ
1.How can I place an order for SMBJ24AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AHE3_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 SMBJ24AHE3_A/H reliable?
The price and inventory of SMBJ24AHE3_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 SMBJ24AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ24AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AHE3_A/H?
SMBJ24AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AHE3_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 SMBJ24AHE3_A/H?
For technical support, including SMBJ24AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ24AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ24AHE3_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 SMBJ24AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ24AHE3_A/H?
All SMBJ24AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AHE3_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 SMBJ24AHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ24AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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