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Vishay General Semiconductor - Diodes Division SMBJ24AHE3_A/I
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- Part No.:
- SMBJ24AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24AHE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,313
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Product details
Overview
SMBJ24AHE3_A/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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed on power rails and I/O lines of industrial motor controllers.
For engineers reviewing the SMBJ24AHE3_A/I datasheet, SMBJ24AHE3_A/I pinout, SMBJ24AHE3_A/I application, or SMBJ24AHE3_A/I equivalent, key selection considerations include its AEC-Q101 qualification status, unidirectional polarity with cathode band marking, low thermal resistance (RθJL = 20 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its VBR range (26.7–29.5 V), limiting transient energy to safe levels for downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMB package supports automated placement and meets MSL level 1 per J-STD-020.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), operates across -55 °C to +150 °C junction temperature range, and exhibits 0.096 %/°C temperature coefficient of VBR - enabling predictable performance under thermal stress in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR min/max | 26.7 V / 29.5 V at IT = 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above VWM with margin. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability; enables suppression of high-energy transients like inductive switch-off spikes. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off voltage; low value minimizes standby power loss and signal integrity impact. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or enclosed industrial enclosures. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables effective heat dissipation through PCB copper pads without heatsink. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Polarity indicated by cathode band on one end; anode and cathode terminals are axially oriented.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to lower-potential side (e.g., GND or return path); defines unidirectional conduction direction. |
| Cathode | Avalanche conduction node / clamping output | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to clamp voltage to ≤38.9 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power domains. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients from relay coil de-energization or load dump events without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces sharing same supply rail. |
| MSL Level 1, LF peak 260 °C | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh industrial environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC input stage against inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and ground. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to upstream DC-DC converters and microcontroller power supplies. |
Use Scenario: Surge suppression on LIN bus power line exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across VBAT and GND near ECU connector. Use Value: Withstands 600 W pulses while maintaining <1.0 µA leakage at 24 V - preserving battery drain budget in sleep mode. |
| Telecom Power Feeds | PLC Digital I/O Modules |
Use Scenario: Input protection for PoE-powered remote units subjected to lightning-induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary clamping element on DC input before DC-DC isolation stage. Use Value: Fast <1 ns response and 38.9 V clamping enable compatibility with 50 V-rated input capacitors and regulators. |
Use Scenario: Protection of 24 V digital input channels against field-wiring transients and ESD events. IC Role / Device Role / Timing Role: Per-channel TVS mounted adjacent to optocoupler input terminals. Use Value: Low 0.096 %/°C VBR tempco ensures consistent clamping across -40 °C to +85 °C operating range in factory automation cabinets. |
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/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 specs). | Direct material substitution when halogen-free requirement applies; same footprint, thermal, and electrical behavior. |
| SMCJ24AHE3_A/I | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with higher PPPM (1500 W) and RθJL = 15 °C/W. | Used where higher surge energy (e.g., >1000 W) or improved thermal dissipation is required; occupies more PCB area. | Select when system-level surge test requirements exceed 600 W - not a drop-in replacement due to different package and pad layout. |
Compared with SMBJ24AHE3_A/I, SMBJ24AHM3_A/I offers identical protection performance with halogen-free construction, while SMCJ24AHE3_A/I delivers higher surge capacity at the cost of larger board space and revised thermal design - both require explicit validation for mechanical and thermal fit.
Availability
SMBJ24AHE3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply with AEC-Q101 assurance and long-term production continuity.
Supply support for SMBJ24AHE3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering precise clamping, low leakage, and AEC-Q101 validated robustness in compact SMB packages.
FAQ
What is the clamping voltage of SMBJ24AHE3_A/I at its rated peak pulse current?
The SMBJ24AHE3_A/I 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 represents the upper limit of voltage seen by protected circuitry during a full-rated transient event, and is confirmed in the Vishay datasheet Document Number 88392, page 2.
Is SMBJ24AHE3_A/I qualified for automotive applications?
Yes, SMBJ24AHE3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet under "Mechanical Data" and "Ordering Information" sections. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, making it suitable for use in automotive ECUs, body control modules, and power distribution units.
What does the "A/I" suffix mean in SMBJ24AHE3_A/I?
The "A/I" suffix in SMBJ24AHE3_A/I indicates packaging configuration: "A" denotes the revision code, and "I" specifies 13-inch diameter plastic tape and reel delivery with 3200 units per reel. This matches the ordering information table on page 3 of the Vishay datasheet Document Number 88392.
How does SMBJ24AHE3_A/I differ from bidirectional variants like SMBJ24CA?
SMBJ24AHE3_A/I is unidirectional with cathode-band polarity and conducts only in reverse breakdown; SMBJ24CA is bidirectional with symmetrical clamping in both directions and no polarity marking. Electrical parameters such as VWM (24 V) and VC (38.9 V) apply to each direction in the CA version, whereas SMBJ24AHE3_A/I clamps only on the cathode-side overvoltage.
What is the thermal resistance from junction to ambient for SMBJ24AHE3_A/I?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ24AHE3_A/I is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the "Thermal Characteristics" table on page 3 of the Vishay datasheet Document Number 88392.
SMBJ24AHE3_A/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:
- 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/I FAQ
1.How can I place an order for SMBJ24AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24AHE3_A/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_A/I reliable?
The price and inventory of SMBJ24AHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ24AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24AHE3_A/I?
SMBJ24AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24AHE3_A/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_A/I?
For technical support, including SMBJ24AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24AHE3_A/I requirements.
6.How does Aetrix verify that SMBJ24AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ24AHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ24AHE3_A/I?
All SMBJ24AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24AHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ24AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24AHE3_A/I Tags
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