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Vishay General Semiconductor - Diodes Division SMBJ24CAHE3_B/I
- Part No.:
- SMBJ24CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CAHE3_B/I.pdf
- Description:
- 600W,24V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,252
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Product details
Overview
SMBJ24CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 24 V standoff voltage (VWM), 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 to protect MOSFET gates and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ24CAHE3_B/I datasheet, SMBJ24CAHE3_B/I pinout, SMBJ24CAHE3_B/I application, or SMBJ24CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical reverse/forward conduction behavior due to its bidirectional construction. Its 26.7–29.5 V breakdown voltage range (VBR at 1 mA) ensures reliable triggering before sensitive downstream circuitry reaches damage thresholds.
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers sub-nanosecond response time and low incremental surge resistance. The glass-passivated junction and MSL Level 1 rating support reflow compatibility up to 260 °C peak temperature without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VC @ IPPM | 38.9 V - Clamped voltage at 15.4 A peak pulse current; determines maximum stress imposed on protected ICs during transients. |
| IPPM | 15.4 A - Peak surge current survivable under 10/1000 µs waveform; sets minimum line impedance requirement for effective energy diversion. |
| PPPM | 600 W - Peak pulse power handling capacity; enables protection against high-energy transients like inductive switch-off spikes. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments with minimal derating. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" pads; informs PCB copper area requirements for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated terminals compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line without polarity constraint. |
| Cathode | Transient current entry (bidirectional) | Completes low-impedance path to ground during overvoltage events; electrically identical to Anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil de-energization or motor commutation without failure. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage stress on downstream components compared to higher-ratio suppressors. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorn cracking or delamination. |
| Glass passivated junction | Provides stable leakage performance (<1 µA at VWM) and long-term reliability under thermal cycling. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from BLDC motor phase switching. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across power FET source-drain or gate-source nodes to limit dv/dt-induced latch-up. Use Value: Prevents destruction of 24 V-rated gate drivers by limiting transient voltage to ≤38.9 V during 15.4 A surges. |
Use Scenario: ESD and load-dump protection on LIN bus lines and window lift control inputs in passenger vehicles. IC Role / Device Role / Timing Role: Fast-response shunt element that diverts >8 kV contact ESD pulses away from LIN transceivers and microcontroller GPIOs. Use Value: Maintains signal integrity during ISO 10605 testing while supporting AEC-Q101-compliant production traceability. |
| Industrial Sensor Interfaces | Telecom Power Supply Inputs |
|
Use Scenario: Guarding analog front-end circuits of pressure/temperature sensors exposed to field wiring transients in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF at 0 V) parallel clamp on 4–20 mA loop inputs to prevent op-amp input stage damage. Use Value: Enables robust operation in noisy plant environments without distorting low-bandwidth sensor signals. |
Use Scenario: Secondary-side transient suppression on 24 V DC input rails of PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after DC/DC converter output to absorb residual surges escaping primary-side protection. Use Value: Adds redundancy to multi-stage protection schemes while maintaining <1 µA leakage at full rated voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CAHM3_B/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 by OEM specifications. | Choose when environmental compliance requires bromine/chlorine-free molding compound. |
| SMAJ24CAHE3_A/H | Lower peak pulse power (400 W), smaller SMA (DO-214AC) package, same VWM/VC ratings. | Reduced surge handling margin; suitable only for lower-energy threat environments (e.g., consumer USB ports). | Select only if board space constraints prohibit SMB footprint and transient energy is confirmed ≤400 W. |
Compared with SMBJ24CAHE3_B/I, the HM3 variant offers identical protection performance with halogen-free materials, while the SMAJ24CAHE3_A/H trades 33 % lower pulse power for 30 % smaller footprint-neither is pin-compatible due to differing package outlines and thermal pad layouts.
Availability
SMBJ24CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ24CAHE3_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 diodes, rectifiers, MOSFETs, and protection devices 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 does the "CA" suffix indicate in SMBJ24CAHE3_B/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ24CAHE3_B/I provides symmetrical clamping in both forward and reverse directions. This eliminates polarity concerns during PCB layout and enables use on AC-coupled or differential signal lines where voltage polarity may reverse, unlike unidirectional "A" variants which require correct cathode orientation.
Is SMBJ24CAHE3_B/I suitable for automotive applications?
Yes, SMBJ24CAHE3_B/I is AEC-Q101 qualified and manufactured with automotive-grade process controls, including extended temperature cycling and humidity testing. Its HE3 suffix confirms RoHS compliance and automotive qualification, making it appropriate for under-hood and cabin modules such as body controllers and ADAS sensor interfaces.
What is the maximum clamping voltage of SMBJ24CAHE3_B/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ24CAHE3_B/I is 38.9 V at 15.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the SMB (DO-214AA) package of SMBJ24CAHE3_B/I compare thermally to SMA (DO-214AC)?
The SMB package used in SMBJ24CAHE3_B/I provides lower thermal resistance than SMA: RθJA is 100 °C/W versus ~140 °C/W for SMA variants under identical 0.2" × 0.2" pad conditions. This allows SMBJ24CAHE3_B/I to sustain higher average power dissipation and improves reliability in thermally constrained designs.
Can SMBJ24CAHE3_B/I be used in place of a unidirectional TVS like SMBJ24AHE3_B/I?
No-SMBJ24CAHE3_B/I is bidirectional and lacks polarity marking, while SMBJ24AHE3_B/I is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SMBJ24CAHE3_B/I works on AC or floating nodes, but cannot replace SMBJ24AHE3_B/I in DC-biased applications where reverse conduction would cause short-circuit failure.
SMBJ24CAHE3_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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ24CAHE3_B/I FAQ
1.How can I place an order for SMBJ24CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CAHE3_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 SMBJ24CAHE3_B/I reliable?
The price and inventory of SMBJ24CAHE3_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 SMBJ24CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ24CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CAHE3_B/I?
SMBJ24CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CAHE3_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 SMBJ24CAHE3_B/I?
For technical support, including SMBJ24CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ24CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ24CAHE3_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 SMBJ24CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ24CAHE3_B/I?
All SMBJ24CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CAHE3_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 SMBJ24CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ24CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CAHE3_B/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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