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Vishay General Semiconductor - Diodes Division SMB8J24CAHE3_A/I
- Part No.:
- SMB8J24CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CAHE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,686
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Product details
Overview
SMB8J24CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V clamping voltage (VC) at 20.6 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J24CAHE3_A/I datasheet, SMB8J24CAHE3_A/I pinout, SMB8J24CAHE3_A/I application, or SMB8J24CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 20.6 A surge current rating, low 1.0 µA reverse leakage at VWM, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints, and its thermal resistance (RθJA = 72 °C/W) supports operation up to +150 °C junction temperature under defined pad layout.
The SMB8J24CAHE3_A/I conforms to ANSI/IEEE C62.35 standards for transient suppression and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak. Its AEC-Q101 qualification confirms suitability for automotive under-hood and body electronics where reliability under thermal cycling and mechanical shock is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - ensures reliable turn-on above normal operating voltage with margin |
| VC @ IPPM | 38.9 V at 20.6 A - limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 800 W - sustains high-energy transients common in automotive load-dump and ISO 7637-2 pulses |
| ID @ VWM | 1.0 µA - negligible leakage current preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - supports operation in engine control units and powertrain modules |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with standard 0.2" × 0.2" PCB copper pads |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with MSL Level 1 rating (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals - bidirectional clamping allows connection across any two points needing overvoltage protection |
| Case (body) | Thermal and mechanical interface | Plastic molded case rated UL 94 V-0; transfers heat to PCB copper pads (RθJL = 20 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes protected circuit voltage overshoot during fast transients |
| MSL Level 1 compliance | Enables single-pass reflow without baking or special handling |
| Halogen-free RoHS-compliant (HE3 suffix) | Meets automotive environmental requirements and JEDEC JESD201 Class 2 whisker resistance |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from ESD and load-switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector or IC pin to shunt transients before reaching sensitive front-end circuitry. Use Value: Maintains signal fidelity with <1.0 µA leakage at 24 V while clamping 800 W surges to ≤38.9 V - preventing latch-up or damage in AEC-Q100 Grade 2 ICs. | Use Scenario: Safeguarding PLC digital input channels exposed to inductive kickback from solenoids, relays, and motor drivers in factory automation systems. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at terminal block entry point, operating in parallel with optocoupler input stages. Use Value: Withstands repetitive 20.6 A surges (10/1000 µs) without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance testing. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs against lightning-induced surges on outdoor telecom equipment. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of GDT or MOV secondary protection, absorbing initial energy spike. Use Value: Fast response (<1 ns) and low Rsurge limit let-through voltage to safe levels for 100BASE-TX/T1 PHYs rated ≤40 V absolute maximum. | Use Scenario: Input-stage surge protection on 24 V DC power rails of smart home hubs and set-top boxes subjected to mains-borne transients. IC Role / Device Role / Timing Role: Standoff-rated clamp on primary-side DC bus, coordinated with fuse and upstream filter to meet UL 62368-1 Annex D requirements. Use Value: 24 V VWM aligns with nominal 24 V adapter output; 38.9 V VC prevents overvoltage stress on downstream DC-DC controllers and LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CAHE3_A/I | 1000 W PPPM (unidirectional), but bidirectional version rated at 800 W - identical VWM, VBR, VC, and package | Same automotive and industrial use cases; differs only in peak power rating due to internal construction | Select SMBJ24CAHE3_A/I if higher unidirectional surge margin is needed; SMB8J24CAHE3_A/I offers optimized cost/performance for balanced bidirectional threats |
| SMCJ24CAHE3_A/I | Larger SMC (DO-214AB) package, 1500 W PPPM bidirectional, same electrical specs but higher thermal mass and RθJA = 35 °C/W | Better suited for high-power industrial drives or rail applications requiring extended surge endurance | Choose SMCJ24CAHE3_A/I when board space permits and >800 W surge immunity is mandated by system-level test plans |
Compared with SMBJ24CAHE3_A/I and SMCJ24CAHE3_A/I, the SMB8J24CAHE3_A/I delivers optimal balance of AEC-Q101 reliability, SMB footprint density, and 800 W bidirectional surge capacity - making it preferred for space-constrained automotive modules and industrial edge nodes where thermal management relies on PCB copper area rather than package size.
Availability
SMB8J24CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O safeguarding, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMB8J24CAHE3_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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices, with emphasis on high-reliability, automotive-qualified components.
The SMB8JxxCA family targets robust transient suppression in harsh environments, specifically engineered for AEC-Q101 compliance, automated SMT assembly, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of SMB8J24CAHE3_A/I at its rated peak pulse current?
The SMB8J24CAHE3_A/I has a maximum clamping voltage (VC) of 38.9 V at 20.6 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 (Document Number: 88422), and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMB8J24CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMB8J24CAHE3_A/I suitable for automotive applications?
Yes, SMB8J24CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliance and automotive qualification. It is rated for junction temperatures from –55 °C to +150 °C and meets MSL Level 1 for lead-free reflow. The SMB8J24CAHE3_A/I is deployed in engine control units, ADAS sensor interfaces, and body electronics where transient immunity and long-term reliability are critical.
What does the "CA" in SMB8J24CAHE3_A/I signify?
The "CA" in SMB8J24CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both polarities, with identical breakdown and clamping characteristics in either direction. This distinguishes it from unidirectional variants (e.g., SMB8J24AHE3_A/I) and makes the SMB8J24CAHE3_A/I ideal for protecting AC-coupled lines, differential buses like CAN, or any circuit where voltage reversal may occur during transients.
What is the maximum reverse leakage current for SMB8J24CAHE3_A/I at its stand-off voltage?
The SMB8J24CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 24 V stand-off voltage (VWM), tested at TA = 25 °C. This low leakage preserves signal integrity in high-impedance sensor interfaces and ensures minimal power loss in always-on automotive modules. The value is specified in the bidirectional electrical characteristics table of the Vishay datasheet (Document Number: 88422) and remains stable across temperature per derating curves.
How does the SMB8J24CAHE3_A/I package compare to the SMBJ and SMCJ series?
The SMB8J24CAHE3_A/I uses the SMB (DO-214AA) package - same footprint as SMBJ devices but distinct from the larger SMC (DO-214AB) used by SMCJ series. While all three share identical VWM, VBR, and VC ratings for the 24 V variant, the SMB8J24CAHE3_A/I achieves 800 W PPPM in the smaller SMB outline, whereas SMCJ24CAHE3_A/I delivers 1500 W in the larger SMC package. The SMB8J24CAHE3_A/I is optimized for density-constrained layouts where thermal design leverages PCB copper area rather than package volume.
SMB8J24CAHE3_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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J24CAHE3_A/I FAQ
1.How can I place an order for SMB8J24CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CAHE3_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 SMB8J24CAHE3_A/I reliable?
The price and inventory of SMB8J24CAHE3_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 SMB8J24CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J24CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CAHE3_A/I?
SMB8J24CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CAHE3_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 SMB8J24CAHE3_A/I?
For technical support, including SMB8J24CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J24CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J24CAHE3_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 SMB8J24CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J24CAHE3_A/I?
All SMB8J24CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CAHE3_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 SMB8J24CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J24CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J24CAHE3_A/I Tags
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