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Vishay General Semiconductor - Diodes Division SMB8J24CHE3/5B
- Part No.:
- SMB8J24CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J24CHE3/5B.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,771
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Product details
Overview
SMB8J24CHE3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features 24 V stand-off voltage (VWM), 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. Used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMB8J24CHE3/5B datasheet, SMB8J24CHE3/5B pinout, SMB8J24CHE3/5B application, or SMB8J24CHE3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant HE3 suffix, and compatibility with 0.2" × 0.2" copper pad layout per JEDEC standards.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within <1 ns to transients exceeding its 26.7–29.5 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1 µA at 24 V) and low incremental surge resistance, enabling consistent clamping under repetitive surge stress.
Thermal design relies on RθJA = 72 °C/W and RθJL = 20 °C/W, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for rated 800 W dissipation. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, supporting automotive under-hood deployment up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR min/max | 26.7 V / 29.5 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on across production lot. |
| VC @ IPPM | 38.9 V - Clamped voltage at 20.6 A peak pulse current; determines maximum stress imposed on protected IC inputs. |
| PPPM | 800 W - Peak pulse power handling with 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 1/2/5a surges. |
| ID @ VWM | <1 µA - Reverse leakage at 24 V; negligible loading on high-impedance sensor or communication lines. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in engine control units and motor drive enclosures. |
| Package | DO-214AA (SMB) - Surface-mount outline with 0.220" body length; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
DO-214AA (SMB) package: bi-directional device with no polarity marking; symmetrical terminals suitable for AC-coupled or differential signal lines. Cathode band absent; both ends electrically identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Bi-directional clamping: conducts surge current equally in either direction once VBR exceeded; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per J-STD-020 MSL Level 1. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices in same power class. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102; supports lead-free reflow without dewetting or voiding. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for compliance in automotive and industrial safety-critical assemblies. |
Applications
| Automotive CAN Bus Protection | Industrial Analog Sensor Interface |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in vehicle ECUs from ISO 7637-2 load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bi-directional shunt clamp absorbing surge energy while maintaining bus signal integrity below 39 V. Use Value: Prevents CAN transceiver latch-up or damage during 12 V system load dump events up to 800 W peak power. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in PLC analog input modules from field wiring surges. IC Role / Device Role / Timing Role: Voltage-limited shunt element that activates only during overvoltage events, remaining invisible to normal loop operation. Use Value: Enables reliable operation with <1 µA leakage at 24 V supply, preserving loop accuracy and calibration stability. |
| Automotive Camera Module ESD Protection | RS-485 Transceiver Port Protection |
Use Scenario: Shielding MIPI CSI-2 or parallel video data lines in rear-view cameras from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Fast-response (<1 ns) bi-directional clamp placed adjacent to connector to divert ESD before reaching image sensor or serializer IC. Use Value: Meets ISO 10605 ±8 kV contact discharge requirement without adding capacitance that degrades 1 Gbps video signal integrity. |
Use Scenario: Guarding RS-485 half-duplex transceiver (e.g., SN65HVD230) against lightning-induced surges on long industrial cable runs. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of TVS array or integrated protection, handling bulk energy before secondary clamping. Use Value: Withstands 20.6 A peak current at 38.9 V clamping, limiting transceiver common-mode stress well below absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Same VWM (24 V) and VC (38.9 V), but rated for 600 W PPPM (vs. 800 W); non-AEC-Q101, E3 suffix only. | Limited to commercial-grade industrial or consumer systems without automotive qualification requirements. | Select when AEC-Q101 is not mandated and lower surge rating suffices for IEC 61000-4-5 Level 3 testing. |
| SMCJ24CA | Same VWM and VC, but DO-214AB (SMC) package; 1500 W PPPM rating and higher thermal mass (RθJA = 35 °C/W). | Better suited for high-repetition surge environments or PCBs with limited copper area where SMB thermal limits are exceeded. | Choose when board space allows larger SMC footprint and sustained surge duty cycle exceeds SMB8J24CHE3/5B derating limits. |
Compared with SMBJ24CA and SMCJ24CA, SMB8J24CHE3/5B uniquely balances AEC-Q101 compliance, 800 W surge capacity, and compact SMB footprint-making it optimal for space-constrained automotive modules requiring validated reliability.
Availability
SMB8J24CHE3/5B is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor nodes, and RS-485 communication ports requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J24CHE3/5B 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 high-reliability and automotive-grade solutions.
SMB8J24CHE3/5B belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for robust transient suppression in harsh automotive and industrial environments.
FAQ
What does the 'HE3' suffix indicate in SMB8J24CHE3/5B?
The HE3 suffix in SMB8J24CHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. This distinguishes it from commercial-grade E3 variants and confirms suitability for automotive under-hood applications where reliability and plating integrity are critical. SMB8J24CHE3/5B meets all stress tests defined in AEC-Q101 Rev D.
Is SMB8J24CHE3/5B unidirectional or bidirectional?
SMB8J24CHE3/5B is a bi-directional transient voltage suppressor, meaning it provides symmetrical clamping for positive and negative transients without polarity sensitivity. Its datasheet specifies VBR and VC values for both polarities, and the DO-214AA package carries no cathode band marking-confirming true bi-directionality. SMB8J24CHE3/5B is not interchangeable with unidirectional variants like SMB10J24A.
What is the maximum clamping voltage of SMB8J24CHE3/5B and at what current is it specified?
The maximum clamping voltage (VC) of SMB8J24CHE3/5B is 38.9 V, measured at a peak pulse current (IPPM) of 20.6 A using the standard 10/1000 µs waveform. This value is guaranteed across temperature and production lot, and defines the upper voltage limit imposed on protected circuitry during surge events. SMB8J24CHE3/5B maintains this clamping performance up to TJ = 150 °C.
Can SMB8J24CHE3/5B be used in place of SMBJ24CA?
SMB8J24CHE3/5B can functionally replace SMBJ24CA in most surge protection roles due to identical VWM (24 V), VBR (26.7–29.5 V), and VC (38.9 V), but it offers higher PPPM (800 W vs. 600 W) and AEC-Q101 qualification. However, SMB8J24CHE3/5B is not a drop-in replacement if the design relies on non-automotive qualification or requires the exact thermal profile of the SMBJ series. Always verify layout and derating per application conditions for SMB8J24CHE3/5B.
What PCB pad layout is recommended for SMB8J24CHE3/5B to achieve rated power dissipation?
To achieve the full 800 W peak pulse power rating, SMB8J24CHE3/5B requires mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay Document 88422. Smaller pads reduce thermal dissipation capability and require derating per Figure 2 in the datasheet. The DO-214AA outline and pad dimensions are standardized per JEDEC MO-136, and SMB8J24CHE3/5B must be placed with symmetric thermal relief to avoid solder joint stress.
SMB8J24CHE3/5B 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:
- 43V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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)
SMB8J24CHE3/5B FAQ
1.How can I place an order for SMB8J24CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J24CHE3/5B 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 SMB8J24CHE3/5B reliable?
The price and inventory of SMB8J24CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J24CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J24CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J24CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J24CHE3/5B?
SMB8J24CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J24CHE3/5B 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 SMB8J24CHE3/5B?
For technical support, including SMB8J24CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J24CHE3/5B requirements.
6.How does Aetrix verify that SMB8J24CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J24CHE3/5B 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 SMB8J24CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J24CHE3/5B?
All SMB8J24CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J24CHE3/5B, 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 SMB8J24CHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J24CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J24CHE3/5B Tags
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