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Vishay General Semiconductor - Diodes Division SMBJ8.5CAHE3_A/H
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- Part No.:
- SMBJ8.5CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5CAHE3_A/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,858
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Product details
Overview
SMBJ8.5CAHE3_A/H 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 and power lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V maximum clamping voltage (VC) at 41.7 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used in sensor interface protection for industrial automation systems.
For engineers reviewing the SMBJ8.5CAHE3_A/H datasheet, SMBJ8.5CAHE3_A/H pinout, SMBJ8.5CAHE3_A/H application, or SMBJ8.5CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This device operates as a voltage-clamping transient suppressor with symmetrical bidirectional conduction-no polarity marking required-and responds to fast-rising transients (<1 ps typical response time) by entering avalanche breakdown before downstream ICs are damaged. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
The SMBJ8.5CAHE3_A/H is rated for -55 °C to +150 °C operating junction temperature, supports 0.01 % duty cycle repetitive surges, and meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C-enabling compatibility with standard SMT assembly processes without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 9.44 V / 10.4 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 14.4 V at 41.7 A - Clamping voltage during 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity with standardized waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 20 µA max - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance interfaces. |
| TJ max | +150 °C - Maximum junction temperature rating supports operation in under-hood automotive and industrial control environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements. |
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 leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Conducts surge current in either direction; connects to line being protected (e.g., RS-485 A/B, CAN H/L). |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or reference rail during clamping; requires low-inductance layout to ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., USB D+/D-, CAN bus) without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-supports under-hood and ADAS applications. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to ±4 kV (open-circuit) / ±2 kA (short-circuit) when properly laid out. |
| UL 497B recognized | QVGQ2 file E136766 certification confirms suitability as primary protector in telecom and industrial data line applications. |
| MSL Level 1 | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake-out requirements and reducing manufacturing cost. |
Applications
| Industrial Sensor Interface | Automotive CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) and digital I/O lines of pressure/temperature sensors in factory PLC cabinets exposed to relay switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp EFT bursts and inductive kickback. Use Value: Limits transient voltage to ≤14.4 V, preventing damage to 12-bit ADC inputs and microcontroller GPIOs rated for 16 V absolute maximum. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) in vehicle body control modules subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Line-to-ground TVS on CAN_H and CAN_L differential pair, absorbing common-mode surges while preserving signal integrity. Use Value: Maintains <1 ns response time and <0.5 pF junction capacitance at zero bias, avoiding signal distortion at 5 Mbps CAN FD data rates. |
| Telecom Data Line Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Shielding RS-485 transceivers in networked security cameras from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS connected across differential pair (A/B) and referenced to local ground via low-inductance path. Use Value: Withstands 10/1000 µs surges up to 600 W without degradation, meeting Telcordia GR-1089-CORE Level 3 requirements. |
Use Scenario: Adding secondary-level ESD protection to USB 2.0 upstream ports in smart home hubs where internal SoC ESD diodes are insufficient. IC Role / Device Role / Timing Role: Low-capacitance TVS placed between D+ and D− lines and system ground to shunt ±15 kV contact discharge events. Use Value: Delivers <100 ps response and 14.4 V clamping, preventing latch-up in USB PHYs while maintaining full-speed (480 Mbps) signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA-E3/52 | Same electrical specs and SMB package, but commercial-grade (non-AEC-Q101) and RoHS-compliant only-no automotive qualification. | Lacks UL 497B recognition and AEC-Q101 test records; suitable for non-automotive industrial use only. | Select when automotive qualification and UL listing are not required, and cost optimization is prioritized. |
| SMCJ8.5CAHE3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Higher power handling supports harsher surge environments (e.g., motor drive I/O), but requires larger PCB area. | Choose when system-level surge testing exceeds 600 W or thermal management demands lower junction rise. |
Compared with SMBJ8.5CA-E3/52, the SMBJ8.5CAHE3_A/H adds AEC-Q101 qualification and UL 497B recognition for automotive and telecom safety-critical use; versus SMCJ8.5CAHE3_A/H, it trades 900 W extra pulse power for 40 % smaller footprint and higher board density.
Availability
SMBJ8.5CAHE3_A/H is available at Aetrix Electronics and suitable for industrial sensor interface, automotive CAN bus protection, and telecom data line applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ8.5CAHE3_A/H 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, precision, and application-specific validation.
The SMBJ series is engineered for high-reliability transient suppression in automotive, industrial, and communications infrastructure-designed to meet stringent surge immunity standards while enabling automated SMT assembly.
FAQ
What is the clamping voltage of SMBJ8.5CAHE3_A/H at its rated peak pulse current?
The SMBJ8.5CAHE3_A/H has a maximum clamping voltage (VC) of 14.4 V at its rated peak pulse current (IPPM) of 41.7 A, measured under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet Document Number 88392, page 2. The SMBJ8.5CAHE3_A/H maintains this clamping performance across its specified operating temperature range (-55 °C to +150 °C).
Is SMBJ8.5CAHE3_A/H suitable for automotive applications?
Yes, SMBJ8.5CAHE3_A/H is AEC-Q101 qualified and carries the "HE3" suffix denoting RoHS-compliant and automotive-grade qualification. It undergoes rigorous stress testing-including temperature cycling, highly accelerated life testing (HALT), and surge robustness verification-to meet automotive electronic module requirements. The SMBJ8.5CAHE3_A/H is explicitly recommended for CAN bus, LIN, and sensor interface protection in passenger vehicles and commercial vehicles.
Does SMBJ8.5CAHE3_A/H have UL recognition?
Yes, SMBJ8.5CAHE3_A/H is UL 497B recognized under file number E136766 for both unidirectional and bidirectional configurations. This certification validates its suitability as a primary protector in telecommunications and industrial data line applications where regulatory compliance is mandatory. The UL recognition applies specifically to the HE3 variant and is documented in Vishay's official safety compliance summary.
What is the junction-to-ambient thermal resistance of SMBJ8.5CAHE3_A/H?
The SMBJ8.5CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value is critical for estimating junction temperature rise under sustained power dissipation and must be used with the device's 5.0 W steady-state power rating (PD) for thermal design validation. The SMBJ8.5CAHE3_A/H datasheet specifies this in the Thermal Characteristics table on page 3.
How does the bidirectional configuration of SMBJ8.5CAHE3_A/H affect PCB layout?
The SMBJ8.5CAHE3_A/H has no polarity marking due to its symmetrical bidirectional structure, simplifying placement and eliminating orientation errors during automated assembly. Layout requires equal-length, low-inductance traces from each terminal to the protected line and ground reference-especially critical for high-frequency transients. The SMBJ8.5CAHE3_A/H must be placed as close as possible to the connector or IC pin being protected, with ground connections routed directly to a solid ground plane to minimize loop inductance and ensure effective clamping.
SMBJ8.5CAHE3_A/H 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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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)
SMBJ8.5CAHE3_A/H FAQ
1.How can I place an order for SMBJ8.5CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5CAHE3_A/H 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 SMBJ8.5CAHE3_A/H reliable?
The price and inventory of SMBJ8.5CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.5CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.5CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5CAHE3_A/H?
SMBJ8.5CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5CAHE3_A/H 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 SMBJ8.5CAHE3_A/H?
For technical support, including SMBJ8.5CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ8.5CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5CAHE3_A/H 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 SMBJ8.5CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.5CAHE3_A/H?
All SMBJ8.5CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5CAHE3_A/H, 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 SMBJ8.5CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ8.5CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5CAHE3_A/H Tags
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