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Vishay General Semiconductor - Diodes Division SMB8J36CAHE3_A/H
- Part No.:
- SMB8J36CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHE3_A/H.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,698
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Product details
Overview
SMB8J36CAHE3_A/H 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 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 58.1 V maximum clamping voltage (VC) at 13.8 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 SMB8J36CAHE3_A/H datasheet, SMB8J36CAHE3_A/H pinout, SMB8J36CAHE3_A/H application, or SMB8J36CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM ≈ 1.61), MSL Level 1 moisture sensitivity, 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 architecture enables symmetric clamping across both polarities without external circuitry, supporting robust protection of differential buses like CAN FD or RS-485.
The SMB8J36CAHE3_A/H is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing, confirming suitability for high-reliability automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA; defines safe operating margin below clamping threshold |
| VBR min/max | 40.0 V / 44.2 V at 1.0 mA test current - ensures consistent breakdown initiation across production lots and temperature |
| VC @ IPPM | 58.1 V at 13.8 A (10/1000 µs) - limits downstream voltage stress to <1.62×VWM, protecting 3.3 V/5 V logic interfaces |
| PPPM | 800 W - sustains standardized lightning-surge energy (IEC 61000-4-5 Level 4) without degradation when mounted per recommended pad layout |
| Polarity | Bidirectional - provides symmetrical overvoltage protection on AC-coupled or floating lines without polarity awareness |
| Qualification | AEC-Q101 qualified - validated for automotive under-hood and chassis applications including engine control and ADAS sensor modules |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm × 3.94 mm body, compatible with standard 0.2" × 0.2" copper pad footprints |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, no polarity marking (bidirectional device).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage above +VC or below –VC relative to reference plane |
| Case (body) | Thermal and mechanical interface | No electrical connection; serves as primary heat sink path to PCB copper via soldered leads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD47 |
| Low clamping ratio (VC/VWM) | 1.61 - minimizes overvoltage exposure to protected ICs while maintaining margin against false triggering |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying SMT line integration |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| 800 W peak pulse power | Supports IEC 61000-4-5 combination wave (1.2/50 µs voltage, 8/20 µs current) up to Level 4 (4 kV/2 kA) |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs from load-dump and inductive switching transients in engine bay modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Maintains signal integrity under 40 V load-dump events while enabling AEC-Q101-compliant design without additional filtering components. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Common-mode transient suppressor across A/B differential pair and GND, limiting common-mode excursion to <±60 V. Use Value: Prevents bus lock-up during 2 kV ESD contact discharge and 4 kV EFT bursts without degrading 10 Mbps data timing margins. |
| Consumer USB-C Port | Telecom PoE Injector |
Use Scenario: Secondary-level surge protection on USB-C CC and VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: Fast-response clamp absorbing 10/1000 µs surges induced by hot-plug events or nearby ESD. Use Value: Clamps VBUS to ≤58.1 V during 1 kV surge, preserving USB PD controller operation and avoiding overvoltage shutdown. |
Use Scenario: Input-side transient suppression on 48 V DC feed lines of IEEE 802.3bt PoE++ injectors. IC Role / Device Role / Timing Role: Primary surge diverter on DC input rails prior to DC/DC conversion stage. Use Value: Handles 800 W surge energy without failure, ensuring injector uptime during lightning-induced grid transients on outdoor Ethernet runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM specs, RoHS-compliant but not automotive-qualified | Limited to consumer/industrial use; not approved for automotive safety-critical nodes | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMCJ36CAHE3_A/H | Same AEC-Q101 qualification but in larger SMC (DO-214AB) package; 1500 W PPPM, lower RθJA (35 °C/W) | Better thermal performance for high-duty-cycle surges; requires larger PCB footprint and higher assembly cost | Choose for systems with repeated surge exposure or constrained ambient cooling |
Compared with SMB8J36CAHE3_A/H, SMBJ36CA-E3/52 offers identical electrical protection at lower qualification grade, while SMCJ36CAHE3_A/H delivers higher power handling and thermal margin in a larger footprint - enabling trade-offs between automotive compliance, board space, and surge repetition capability.
Availability
SMB8J36CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, and telecom power-over-Ethernet systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J36CAHE3_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 and application-specific performance.
The SMB8JxxCA family targets high-density, AEC-Q101-compliant transient suppression for automotive and industrial electronics where low-profile packaging and fast clamping response are critical.
FAQ
What is the maximum clamping voltage of SMB8J36CAHE3_A/H under standard 10/1000 µs surge conditions?
The SMB8J36CAHE3_A/H exhibits a maximum clamping voltage (VC) of 58.1 V when subjected to its rated peak pulse current of 13.8 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and represents the upper limit of voltage imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V or 5 V interface ICs downstream of SMB8J36CAHE3_A/H.
Is SMB8J36CAHE3_A/H suitable for automotive applications requiring AEC-Q101 certification?
Yes, SMB8J36CAHE3_A/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number: 88422, Revision: 09-Jan-2024). The "HE3" suffix denotes RoHS-compliant and AEC-Q101-qualified construction, making SMB8J36CAHE3_A/H appropriate for automotive powertrain, chassis, and ADAS subsystems where reliability under extended temperature cycling and vibration is mandatory.
How does the bidirectional configuration of SMB8J36CAHE3_A/H affect its PCB layout compared to unidirectional TVS diodes?
The SMB8J36CAHE3_A/H has no polarity marking and functions identically in either orientation, eliminating orientation-dependent placement errors during automated assembly. Unlike unidirectional TVS diodes that require cathode alignment toward the protected rail, SMB8J36CAHE3_A/H can be placed without regard to terminal direction - simplifying layout, reducing assembly defects, and enabling direct replacement in differential or AC-coupled signal paths where polarity reversal may occur.
What is the thermal resistance profile of SMB8J36CAHE3_A/H, and how does it impact sustained surge handling?
SMB8J36CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted per Vishay's recommended 0.2" × 0.2" copper pad layout. These values define its ability to dissipate heat after surge events; for repetitive surges, derating per Figure 2 in the datasheet is required - meaning SMB8J36CAHE3_A/H supports full 800 W rating only at TA ≤ 25 °C, with linear reduction above that temperature.
Does SMB8J36CAHE3_A/H meet moisture sensitivity level (MSL) requirements for lead-free reflow processes?
Yes, SMB8J36CAHE3_A/H meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows unlimited floor life and compatibility with standard lead-free solder profiles without pre-baking - a key advantage for high-throughput SMT lines producing automotive ECUs or industrial controllers where process simplicity and yield stability are essential for SMB8J36CAHE3_A/H deployment.
SMB8J36CAHE3_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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 13.8A
- 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)
SMB8J36CAHE3_A/H FAQ
1.How can I place an order for SMB8J36CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHE3_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 SMB8J36CAHE3_A/H reliable?
The price and inventory of SMB8J36CAHE3_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 SMB8J36CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHE3_A/H?
SMB8J36CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHE3_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 SMB8J36CAHE3_A/H?
For technical support, including SMB8J36CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J36CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHE3_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 SMB8J36CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHE3_A/H?
All SMB8J36CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHE3_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 SMB8J36CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J36CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHE3_A/H Tags
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