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Vishay General Semiconductor - Diodes Division SMB8J36CAHE3/52
- Part No.:
- SMB8J36CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J36CAHE3/52.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,327
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Product details
Overview
SMB8J36CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 800 W peak pulse power (10/1000 µs), 36 V stand-off voltage (VWM), and 58.1 V clamping voltage (VC) at 13.8 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, CAN transceivers, and power supply rails against ESD and load dump.
For engineers reviewing the SMB8J36CAHE3/52 datasheet, SMB8J36CAHE3/52 pinout, SMB8J36CAHE3/52 application, or SMB8J36CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 36 V working voltage tolerance, and compatibility with automated SMT assembly on 0.2" × 0.2" 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 symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Designed for automotive-grade reliability, SMB8J36CAHE3/52 meets MSL Level 1 per J-STD-020, supports peak surge currents up to 13.8 A (10/1000 µs), and maintains stable clamping performance across -55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 58.1 V - clamping voltage at 13.8 A peak pulse current, limiting downstream voltage stress |
| PPPM | 800 W - peak pulse power handling per 10/1000 µs waveform, defining surge energy capacity |
| VBR min/max | 40.0 V / 44.2 V - breakdown voltage range at 1 mA test current, ensuring consistent turn-on threshold |
| ID @ VWM | 1.0 µA - reverse leakage at 36 V, minimizing standby power loss in high-impedance circuits |
| TJ max | +150 °C - maximum junction temperature, enabling under-hood automotive deployment |
| RθJA | 72 °C/W - thermal resistance junction-to-ambient, guiding PCB copper pad sizing for thermal management |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient conduction path (bidirectional) | Both terminals function identically; no polarity-enables placement without orientation check in automated assembly |
| Anode (Cathode) | Transient conduction path (bidirectional) | Identical electrical behavior to opposite terminal; symmetric I-V curve ensures equal clamping in either direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass-passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 rating | Enables direct placement without baking; compatible with standard reflow profiles peaking at 260 °C |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed automotive and industrial enclosures |
| Low-profile SMB package | 0.180" height enables use in space-constrained modules such as camera ECUs and radar front-ends |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay and chassis modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at sensor connector interface to shunt induced transients before reaching ASIC input pins. Use Value: Limits voltage excursion to ≤58.1 V during ISO 7637-2 Pulse 1/2a/5a events, preserving sensor signal integrity and preventing ADC saturation or latch-up. | Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042, SN65HVD256) against ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance TVS placed between CAN_H and CAN_L lines to absorb common-mode surges without distorting data eye diagram. Use Value: Maintains <1.0 µA leakage at 36 V, avoiding bus bias shift; clamps within nanoseconds to preserve bit timing margins at 5 Mbps. |
| Industrial PLC I/O Protection | DC Power Rail Clamping |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback and field-wiring faults. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at terminal block entry point to divert >1 kV transients before reaching optocoupler or Schmitt trigger inputs. Use Value: Withstands repeated 800 W surges per IEC 61000-4-5 Level 4, extending mean time between failures in factory automation environments. | Use Scenario: Clamping 12–48 V DC power distribution networks feeding infotainment head units and telematics gateways. IC Role / Device Role / Timing Role: Primary overvoltage protector placed upstream of DC-DC converters to prevent catastrophic failure during load dump (ISO 16750-2). Use Value: Delivers 13.8 A peak pulse current handling at 36 V nominal rail, meeting OEM load dump immunity requirements without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J36CA-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free compliance is mandated by OEM material declarations | Choose SMB8J36CA-M3/52 if BOM requires halogen-free materials; otherwise SMB8J36CAHE3/52 satisfies standard automotive requirements. |
| SMAJ36CA-E3/52 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for high-energy load dump; limited to lower-power signal line protection | Select SMAJ36CA-E3/52 only for cost-sensitive consumer electronics where 400 W surge margin suffices and board space is constrained. |
Compared with SMB8J36CA-M3/52, SMB8J36CAHE3/52 offers identical surge performance but prioritizes standard RoHS compliance over halogen-free status; versus SMAJ36CA-E3/52, it delivers double the pulse power and superior thermal dissipation-critical for automotive power rail protection.
Availability
SMB8J36CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN FD bus protection, and industrial 24 V PLC I/O requiring stable component supply with full AEC-Q101 traceability and MSL Level 1 handling.
Supply support for SMB8J36CAHE3/52 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, and protection devices with emphasis on automotive, industrial, and computing applications.
The SMB8JxxCA series targets high-reliability transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance, high-power density packaging, and robust clamping stability across temperature extremes.
FAQ
What is the clamping voltage of SMB8J36CAHE3/52 at its rated peak pulse current?
The SMB8J36CAHE3/52 has 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 under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB8J36CAHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMB8J36CAHE3/52 suitable for protecting CAN FD bus lines?
Yes, SMB8J36CAHE3/52 is suitable for CAN FD bus protection due to its bidirectional symmetry, low leakage (<1.0 µA at 36 V), and fast response time. Its 58.1 V clamping voltage safely contains ISO 7637-2 and IEC 61000-4-5 transients without distorting the 5 Mbps data eye. The SMB8J36CAHE3/52 must be placed as close as possible to the CAN transceiver's pins with minimized trace inductance to preserve signal integrity.
Does SMB8J36CAHE3/52 require orientation during PCB placement?
No, SMB8J36CAHE3/52 does not require orientation during PCB placement because it is a bidirectional TVS diode with symmetrical terminals and no polarity marking. Both ends perform identically under reverse or forward surge conditions. This eliminates orientation verification steps in automated SMT assembly and reduces risk of misplacement in high-volume manufacturing of automotive modules.
What is the thermal resistance of SMB8J36CAHE3/52, and how does it affect layout?
The SMB8J36CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value guides minimum copper area requirements: reducing pad size increases thermal impedance, risking junction overheating during repetitive surges. For sustained operation near TJ max (150 °C), designers should verify thermal performance using the device's transient thermal impedance curve (Fig. 5) in the SMB8J36CAHE3/52 datasheet.
How does SMB8J36CAHE3/52 differ from unidirectional variants like SMB10J36AHE3/52?
SMB8J36CAHE3/52 is bidirectional with symmetrical clamping in both directions and no cathode band, while SMB10J36AHE3/52 is unidirectional with a marked cathode and conducts only in reverse bias. SMB8J36CAHE3/52 provides 800 W peak pulse power and 13.8 A IPPM, whereas SMB10J36AHE3/52 delivers 1000 W and 17.2 A. The SMB8J36CAHE3/52 is preferred for AC-coupled or differential lines; SMB10J36AHE3/52 suits DC power rail protection where higher surge margin is needed.
SMB8J36CAHE3/52 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):
- 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)
SMB8J36CAHE3/52 FAQ
1.How can I place an order for SMB8J36CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J36CAHE3/52 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 SMB8J36CAHE3/52 reliable?
The price and inventory of SMB8J36CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J36CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J36CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J36CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J36CAHE3/52?
SMB8J36CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J36CAHE3/52 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 SMB8J36CAHE3/52?
For technical support, including SMB8J36CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J36CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J36CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J36CAHE3/52 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 SMB8J36CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J36CAHE3/52?
All SMB8J36CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J36CAHE3/52, 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 SMB8J36CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J36CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J36CAHE3/52 Tags
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