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Vishay General Semiconductor - Diodes Division SMB8J36CAHM3_A/I
- Part No.:
- SMB8J36CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHM3_A/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,074
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Product details
Overview
SMB8J36CAHM3_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 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 58.1 V 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 SMB8J36CAHM3_A/I datasheet, SMB8J36CAHM3_A/I pinout, SMB8J36CAHM3_A/I application, or SMB8J36CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJL = 20 °C/W) for reliable operation up to +150 °C junction temperature.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage exceeding VWM (36 V), it avalanches symmetrically in both directions to clamp the line at ≤58.1 V. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM).
Designed per ANSI/IEEE C62.35, it delivers fast response time (<1 ns), low incremental surge resistance, and meets MSL level 1 (260 °C reflow). The SMB package supports automated placement and provides thermal dissipation via copper pad layout (0.2" × 0.2") per Vishay's recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 40.0 V / 44.2 V at 1.0 mA - defines tight breakdown tolerance for predictable turn-on threshold |
| VC @ IPPM | 58.1 V at 13.8 A - clamping voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 800 W - peak surge power handling capacity under standardized waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive and industrial environments |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance supports sustained surge duty cycles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (1) | Surge current path (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity |
| Anode/Cathode (2) | Surge current path (bidirectional) | Complementary terminal completing the symmetrical clamping path; identical electrical role |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JESD201 Class 2 whisker resistance for long-term reliability |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with minimal parameter drift in harsh environments |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without preconditioning or special handling |
| Low RθJL (20 °C/W) | Enables efficient heat transfer to PCB pads, improving surge endurance in repeated transient events |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Clamps transients to ≤58.1 V while maintaining <1.0 µA leakage, preserving signal fidelity and preventing interface IC latch-up. |
Use Scenario: Safeguarding PLC digital input modules against induced surges from relay switching or motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines before optocoupler or MCU GPIO protection stage. Use Value: Absorbs 800 W surges without degradation, enabling robust operation in factory-floor electromagnetic environments. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Secondary-level surge suppression on Ethernet PHY power rails or PoE auxiliary lines subject to lightning-induced transients. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp between VDD and GND, coordinated with primary MOV or GDT stages. Use Value: Sub-1 ns response and 58.1 V clamping prevent damage to sensitive PHY ICs during multi-kV surge events. |
Use Scenario: Input-stage transient protection on AC-DC adapter secondary-side 5–24 V outputs exposed to user plug/unplug events. IC Role / Device Role / Timing Role: Standoff-rated (36 V) TVS placed after rectification but before LDO or buck converter input. Use Value: Maintains system uptime by suppressing repetitive 100–500 V spikes without degrading due to low leakage and high cycle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J36CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks halogen-free certification; suitable for commercial, non-automotive industrial use | Select when halogen-free requirement is not mandated and cost optimization is prioritized |
| SMAJ36CA-QH | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 95 °C/W) | Not AEC-Q101 qualified; limited to lower-energy consumer or telecom applications | Choose only for space-constrained designs where 800 W surge rating is not required |
Compared with SMB8J36CAHM3_A/I, the HE3 variant trades halogen-free compliance for lower cost in non-automotive settings, while the SMAJ36CA-QH sacrifices surge robustness and automotive qualification for smaller size - making SMB8J36CAHM3_A/I the optimal choice for AEC-Q101–mandated, high-energy bidirectional protection.
Availability
SMB8J36CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J36CAHM3_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 is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMB8J36CAHM3_A/I belongs to Vishay's TRANSZORB® TVS family - engineered specifically for high-power-density, bidirectional surge suppression in AEC-Q101–compliant automotive and industrial systems.
FAQ
What is the clamping voltage of SMB8J36CAHM3_A/I and how is it measured?
The SMB8J36CAHM3_A/I has a maximum clamping voltage (VC) of 58.1 V, measured at 13.8 A peak pulse current (IPPM) using a 10/1000 µs waveform per ANSI/IEEE C62.35. This value reflects the actual voltage seen by protected circuitry during a standardized surge event - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMB8J36CAHM3_A/I achieves this with low incremental surge resistance and a glass-passivated junction.
Is SMB8J36CAHM3_A/I suitable for automotive applications?
Yes, SMB8J36CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting requirements for under-hood and chassis-mounted automotive electronics. Its +150 °C maximum junction temperature, MSL Level 1 rating, and validated surge performance make SMB8J36CAHM3_A/I appropriate for engine control units, ADAS sensor interfaces, and body electronics.
How does the bidirectional configuration of SMB8J36CAHM3_A/I differ from unidirectional TVS diodes?
Unlike unidirectional TVS diodes that conduct only in reverse bias, SMB8J36CAHM3_A/I provides symmetrical clamping in both polarities - essential for protecting AC-coupled lines, differential buses (e.g., CAN), or circuits where voltage reversal may occur. Its breakdown occurs at ±40.0–44.2 V, with identical VC (58.1 V) and IPPM (13.8 A) in either direction - a feature confirmed in the bidirectional electrical characteristics table of Vishay document 88422.
What is the thermal resistance profile of SMB8J36CAHM3_A/I and why does it matter?
SMB8J36CAHM3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" copper pads. Low RθJL enables rapid heat transfer from the silicon die to the PCB leads, sustaining multiple surge events without thermal runaway - a key advantage over alternatives with higher RθJA, especially in compact, sealed enclosures where airflow is limited.
Does SMB8J36CAHM3_A/I require special PCB layout considerations?
Yes - Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal to achieve rated PPPM (800 W) and thermal performance. Reducing pad size increases RθJA and reduces surge capability. The SMB8J36CAHM3_A/I also requires symmetric trace routing and avoidance of thermal reliefs on pads to maintain low-inductance, low-resistance paths essential for sub-1 ns response and effective clamping.
SMB8J36CAHM3_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):
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J36CAHM3_A/I FAQ
1.How can I place an order for SMB8J36CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHM3_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 SMB8J36CAHM3_A/I reliable?
The price and inventory of SMB8J36CAHM3_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 SMB8J36CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHM3_A/I?
SMB8J36CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHM3_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 SMB8J36CAHM3_A/I?
For technical support, including SMB8J36CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J36CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHM3_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 SMB8J36CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHM3_A/I?
All SMB8J36CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHM3_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 SMB8J36CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J36CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHM3_A/I Tags
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