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Vishay General Semiconductor - Diodes Division SMB8J8.0CAHE3/52
- Part No.:
- SMB8J8.0CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CAHE3/52.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,956
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Product details
Overview
SMB8J8.0CAHE3/52 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 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 100 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform), with AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J8.0CAHE3/52 datasheet, SMB8J8.0CAHE3/52 pinout, SMB8J8.0CAHE3/52 application, or SMB8J8.0CAHE3/52 equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VWM = 1.7), AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown threshold (VBR = 8.89–9.83 V at IT = 1.0 mA). Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
It delivers 800 W peak pulse power under standardized 10/1000 µs waveform conditions, with clamping performance validated at 100 A IPPM, and maintains stable operation across -55 °C to +150 °C junction temperature range. The glass-passivated junction ensures robust surge endurance and long-term reliability under repetitive stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe signal swing margin. |
| VBR (min/max) | 8.89 V / 9.83 V at 1.0 mA - Ensures consistent turn-on across production lot; guarantees clamping initiates above system nominal voltage. |
| VC @ IPPM | 13.6 V at 100 A - Limits protected circuit voltage during worst-case 800 W surge; clamping ratio = 1.7× VWM. |
| PPPM | 800 W (10/1000 µs) - Sustains high-energy transients common in automotive load-dump or inductive switching events. |
| IPPM | 100 A - Peak surge current capability verified per ANSI/IEEE C62.35; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| RθJA | 72 °C/W - Thermal resistance determines junction temperature rise under sustained power dissipation; requires minimum 5.0 mm × 5.0 mm copper pad per terminal. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; case outline conforms to JEDEC DO-214AA standard, dimensions 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; no cathode band - device functions identically in either orientation. |
| Case (body) | Thermal and mechanical interface | Non-conductive epoxy body; heat transfer occurs via soldered terminals to PCB copper; no electrical connection to case. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), or ungrounded power rails without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring extended temperature operation and long-term reliability. |
| Glass-passivated junction | Improves surge lifetime and reduces parameter drift over time compared to non-passivated alternatives; enhances moisture resistance. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage stress on downstream ICs during surge events, preserving signal integrity and reducing need for additional buffering. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during assembly. |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed at power entry point, clamping surges before they reach LDOs or microcontrollers. Use Value: Withstands 800 W pulses and operates up to +150 °C, meeting stringent automotive thermal and energy requirements without derating. |
Use Scenario: Safeguarding high-speed CAN FD transceivers from ESD (IEC 61000-4-2) and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CANH/CANL differential pair, providing symmetrical clamping without disrupting DC bias. Use Value: 13.6 V clamping voltage ensures transceiver remains within common-mode tolerance while maintaining signal fidelity at >5 Mbps. |
| Industrial Sensor Interface Protection | Consumer USB Port ESD Guard |
|
Use Scenario: Shielding 4–20 mA or 0–10 V analog sensor outputs in factory automation systems exposed to relay switching transients. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA at 8.0 V) shunt protector located at connector side of signal conditioning circuitry. Use Value: Sub-µA leakage avoids measurement offset errors; fast response preserves signal edge integrity during sub-ns EFT bursts. |
Use Scenario: Adding secondary-level ESD protection to USB 2.0 data lines (D+/D−) in portable electronics where primary protection resides in the controller. IC Role / Device Role / Timing Role: Bidirectional TVS placed adjacent to USB connector, absorbing ±15 kV contact discharge per IEC 61000-4-2. Use Value: 100 A IPPM rating handles multi-pulse ESD events; SMB footprint allows placement directly at board edge with minimal trace inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-E3/52 | Same SMB package and VWM/VC, but rated for 600 W PPPM (vs. 800 W) and 72.2 A IPPM; not AEC-Q101 qualified. | Limited to commercial/industrial environments; unsuitable for automotive under-hood deployment due to missing qualification. | Select when cost sensitivity outweighs automotive compliance and lower surge energy (600 W) suffices. |
| SMCJ8.0CA-13-F | Same VWM/VC but in larger SMC (DO-214AB) package; rated for 1500 W PPPM and 123 A IPPM; AEC-Q101 qualified. | Higher surge capacity suits high-risk locations (e.g., alternator output); larger footprint consumes more PCB area. | Choose when system-level surge threat exceeds 800 W or layout allows SMC footprint for enhanced margin. |
Compared with SMBJ8.0CA-E3/52, SMB8J8.0CAHE3/52 provides +33 % peak power handling and automotive qualification; versus SMCJ8.0CA-13-F, it trades 87.5 % higher surge rating for 40 % smaller PCB area and identical thermal pad requirements.
Availability
SMB8J8.0CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and consumer USB port hardening requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMB8J8.0CAHE3/52 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 SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial systems.
FAQ
What is the clamping voltage of SMB8J8.0CAHE3/52 at its rated peak pulse current?
The SMB8J8.0CAHE3/52 has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current of 100 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe voltage limits during surge events. The clamping performance is guaranteed across the full operating temperature range of -55 °C to +150 °C.
Is SMB8J8.0CAHE3/52 suitable for protecting CAN FD bus lines?
Yes, SMB8J8.0CAHE3/52 is well-suited for CAN FD bus protection due to its bidirectional symmetry, 13.6 V clamping voltage (within typical CAN transceiver common-mode range), and fast response time. Its low leakage (<1.0 µA at 8.0 V) prevents signal distortion, and the SMB footprint allows placement directly at the connector with minimal parasitic inductance-critical for preserving signal integrity above 5 Mbps.
Does SMB8J8.0CAHE3/52 require special PCB layout considerations?
Yes. To achieve rated 800 W pulse power, SMB8J8.0CAHE3/52 must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal, per Vishay's thermal test condition. Smaller pads increase RθJA and reduce surge capability. Additionally, keep traces short and wide between the device and protected node to minimize inductance, especially for ESD and EFT protection.
How does the HE3 suffix affect SMB8J8.0CAHE3/52's specifications?
The HE3 suffix on SMB8J8.0CAHE3/52 indicates RoHS-compliant construction with AEC-Q101 qualification-distinct from E3 (RoHS commercial) or HM3 (halogen-free + AEC-Q101). This suffix confirms full automotive reliability validation, including temperature cycling, HTRB, and ESD testing, without altering electrical parameters like VWM, VC, or PPPM.
Can SMB8J8.0CAHE3/52 replace SMBJ8.0CA in an existing design?
SMB8J8.0CAHE3/52 is not a direct drop-in replacement for SMBJ8.0CA due to higher peak pulse power (800 W vs. 600 W) and AEC-Q101 qualification-both beneficial but requiring verification of thermal margin and layout compliance. While pin-compatible and same footprint, its tighter VBR tolerance (8.89–9.83 V vs. 8.4–9.4 V) may affect turn-on timing in precision clamp circuits.
SMB8J8.0CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 58.8A
- 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)
SMB8J8.0CAHE3/52 FAQ
1.How can I place an order for SMB8J8.0CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CAHE3/52 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 SMB8J8.0CAHE3/52 reliable?
The price and inventory of SMB8J8.0CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J8.0CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CAHE3/52?
SMB8J8.0CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CAHE3/52 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 SMB8J8.0CAHE3/52?
For technical support, including SMB8J8.0CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J8.0CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CAHE3/52 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 SMB8J8.0CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CAHE3/52?
All SMB8J8.0CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CAHE3/52, 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 SMB8J8.0CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J8.0CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CAHE3/52 Tags
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