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Vishay General Semiconductor - Diodes Division SMCJ36HE3/9AT
- Part No.:
- SMCJ36HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ36HE3/9AT.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,878
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Product details
Overview
SMCJ36HE3/9AT from Vishay General Semiconductor is a surface-mount, AEC-Q101 qualified, bi-directional transient voltage suppressor (TVS) in DO-214AB (SMCJ) package. It features 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 58.1 V clamping voltage (VC) at 25.8 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - designed for robust overvoltage protection of automotive sensor signal lines and power rails.
For engineers reviewing the SMCJ36HE3/9AT datasheet, SMCJ36HE3/9AT pinout, SMCJ36HE3/9AT application, or SMCJ36HE3/9AT equivalent, this device delivers validated surge immunity per ISO 7637-2 and IEC 61000-4-5 in space-constrained, high-reliability automotive ECUs and industrial control interfaces where low clamping voltage and AEC-Q101 qualification are mandatory.
Technical Context
The SMCJ36HE3/9AT employs a glass-passivated silicon avalanche junction optimized for fast response (<1 ns) to transient events and low incremental surge resistance. Its bi-directional architecture enables symmetrical clamping across both polarities without polarity marking, supporting protection of AC-coupled or differential signal paths.
Thermal performance is defined by RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and maximum junction temperature of 150 °C, enabling reliable operation in under-hood automotive environments. The HE3 suffix confirms AEC-Q101 qualification, JESD 201 Class 2 whisker resistance, and RoHS compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping initiates; sets safe margin below system rail voltage. |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - Confirmed breakdown threshold range ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 58.1 V at 25.8 A - Clamped voltage during 10/1000 µs surge; limits stress on downstream ICs such as CAN transceivers or microcontrollers. |
| PPPM | 1500 W - Peak transient energy handling capability; supports Level 4 ISO 7637-2 load dump immunity in 12 V systems. |
| ID @ VWM | 1.0 µA - Ultra-low leakage at rated stand-off voltage; prevents battery drain in always-on automotive modules. |
| TJ max | +150 °C - Enables placement near heat sources (e.g., power MOSFETs) in engine control units without derating. |
| Package | DO-214AB (SMCJ) - Industry-standard surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint for automated assembly and efficient heat dissipation. |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with J-bend leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Bi-directional construction means no polarity marking; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional avalanche junction conducts surge current equally in either direction; no cathode band marking required. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; bottom surface transfers heat to PCB copper pads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for ECU front-end protection. |
| 1500 W peak pulse power | Withstands 10/1000 µs surges up to 25.8 A while clamping at ≤58.1 V - sufficient for ISO 7637-2 Pulse 5a (load dump) in 12 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Clamps at only ~1.4× breakdown voltage - minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal stress - critical for long-life automotive applications operating >15 years. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirements. |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to alternator load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bi-directional TVS diode placed at sensor connector interface to clamp ±100 V transients within nanoseconds. Use Value: Maintains signal integrity by limiting voltage excursion to ≤58.1 V, preventing latch-up or damage to 3.3 V/5 V ADC inputs and op-amps. |
Use Scenario: Shielding high-speed CAN FD physical layer (PHY) transceivers from ESD and coupled surges on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS mounted directly at CANH/CANL connector pins to absorb fast transients without distorting data edges. Use Value: Delivers sub-1 ns response and 58.1 V clamping to preserve signal eye diagram integrity while meeting ISO 11898-2 EMC immunity requirements. |
| Industrial PLC I/O Protection | DC Power Rail Clamp |
|
Use Scenario: Safeguarding digital input channels of programmable logic controllers connected to 24 V field wiring subject to relay contact bounce and motor drive coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between field input and optocoupler input to shunt induced spikes before they reach isolation barrier. Use Value: 36 V VWM allows compatibility with 24 V nominal systems while providing 1500 W surge headroom - eliminating need for series current-limiting resistors. |
Use Scenario: Secondary overvoltage clamp on regulated 3.3 V or 5 V supply rails feeding safety-critical microcontrollers in ADAS domain controllers. IC Role / Device Role / Timing Role: Fast-acting TVS connected between rail and ground to catch regulator failure or backfeed transients exceeding 120% of nominal voltage. Use Value: 1.0 µA leakage at 36 V ensures zero impact on rail stability; 58.1 V clamping prevents catastrophic failure of downstream logic ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), unidirectional only, no AEC-Q101 qualification. | Suitable for cost-sensitive consumer electronics; insufficient for automotive load dump immunity. | Select only for non-automotive, low-energy surge environments where board space is constrained. |
| SMCJ36AHE3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in marking code (no "CA" suffix implies unidirectional, but SMCJ36HE3/9AT is bi-directional per Vishay documentation). | Same automotive use cases; requires verification of polarity marking on actual unit - SMCJ36HE3/9AT has no band, SMCJ36AHE3/9AT may be marked. | Confirm device orientation and marking before substitution; both meet identical surge and thermal specs. |
Compared with SMAJ36A-E3/61T, the SMCJ36HE3/9AT delivers 3.75× higher surge power handling and automotive qualification; versus SMCJ36AHE3/9AT, it guarantees bi-directional symmetry with no polarity dependency - critical for protecting differential bus lines like LIN or SENT.
Availability
SMCJ36HE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and DC power distribution systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMCJ36HE3/9AT 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMCJ series was engineered specifically for automotive-grade transient suppression, combining high-power surge capability, AEC-Q101 validation, and surface-mount scalability for next-generation ECU and ADAS module designs.
FAQ
What does the "HE3" suffix indicate in SMCJ36HE3/9AT?
The HE3 suffix in SMCJ36HE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification, JESD 201 Class 2 whisker resistance, and matte tin-plated leads. It distinguishes this automotive-grade variant from commercial-grade E3 versions and confirms compliance with stringent automotive reliability standards - a key requirement for SMCJ36HE3/9AT deployment in engine control and safety-critical modules.
Is SMCJ36HE3/9AT bi-directional or uni-directional?
SMCJ36HE3/9AT is explicitly bi-directional, as confirmed by its inclusion in the SMCJxxCA family designation in Vishay's datasheet (Document Number 88394) and absence of cathode band marking. This enables symmetrical clamping on both polarities - essential for protecting AC-coupled signals, differential buses, and ungrounded power domains where polarity reversal may occur.
What is the maximum clamping voltage for SMCJ36HE3/9AT at rated surge current?
The maximum clamping voltage (VC) for SMCJ36HE3/9AT is 58.1 V at 25.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - a critical parameter for ensuring downstream IC survival in automotive applications.
Can SMCJ36HE3/9AT replace SMCJ36AHE3/9AT in a design?
Yes, SMCJ36HE3/9AT can replace SMCJ36AHE3/9AT in most applications because both share identical electrical specifications, AEC-Q101 qualification, and DO-214AB packaging. However, SMCJ36HE3/9AT is confirmed bi-directional with no polarity marking, whereas SMCJ36AHE3/9AT may be marked for unidirectional use - verify physical marking and schematic polarity before substitution to ensure correct functionality in SMCJ36HE3/9AT implementation.
What thermal pad layout is required to achieve the rated 1500 W PPPM for SMCJ36HE3/9AT?
To achieve the full 1500 W peak pulse power rating, SMCJ36HE3/9AT must be mounted on minimum recommended copper pads: 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal, as specified in Vishay's datasheet. Smaller pads reduce thermal dissipation and require derating per Figure 2 - undersized layouts may limit SMCJ36HE3/9AT to <1000 W in practice, compromising surge immunity in demanding automotive environments.
SMCJ36HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ36HE3/9AT FAQ
1.How can I place an order for SMCJ36HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ36HE3/9AT 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 SMCJ36HE3/9AT reliable?
The price and inventory of SMCJ36HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ36HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ36HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ36HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ36HE3/9AT?
SMCJ36HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ36HE3/9AT 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 SMCJ36HE3/9AT?
For technical support, including SMCJ36HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ36HE3/9AT requirements.
6.How does Aetrix verify that SMCJ36HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ36HE3/9AT 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 SMCJ36HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ36HE3/9AT?
All SMCJ36HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ36HE3/9AT, 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 SMCJ36HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ36HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ36HE3/9AT Tags
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