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Vishay General Semiconductor - Diodes Division SMCJ36A-M3/9AT
- Part No.:
- SMCJ36A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ36A-M3/9AT.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,496
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Product details
Overview
SMCJ36A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 58.1 V maximum clamping voltage (VC) at 25.8 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ36A-M3/9AT datasheet, SMCJ36A-M3/9AT pinout, SMCJ36A-M3/9AT application, or SMCJ36A-M3/9AT equivalent, this page delivers verified electrical specs, thermal behavior, polarity marking, JEDEC-compliant packaging, and AEC-Q101-qualified alternatives - all critical for ESD/surge hardening in high-reliability embedded systems.
Technical Context
The SMCJ36A-M3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its reverse stand-off voltage (36 V), clamping transients to ≤58.1 V within nanoseconds. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent energy absorption across repeated 10/1000 μs surges up to 1500 W.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 (260 °C reflow peak) and JESD201 Class 2 whisker resistance. The cathode band identifies polarity; no marking is used for bidirectional variants - confirming strict unidirectional functionality for DC-biased protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC rail margin for 48 V nominal systems. |
| VBR min/max | 40.0 V / 44.2 V at IT = 1 mA - tight breakdown window ensures predictable turn-on without premature conduction under ripple or noise. |
| VC @ IPPM | 58.1 V at 25.8 A - clamping voltage during 10/1000 μs surge; limits downstream IC stress to <60 V in 48 V automotive circuits. |
| PPPM | 1500 W - peak transient power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV line-to-ground) compliance with proper PCB layout. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard pad layout; informs derating above 25 °C ambient for sustained surge duty cycles. |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMCJ36A-M3/9AT uses the SMC (DO-214AB) package: a 2-terminal, surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002. Polarity is marked by a cathode band on the body end; the banded terminal is the cathode (anode is unmarked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VBR, clamping voltage to VC. |
| Anode (unmarked end) | Reference node | Typically tied to system ground or low-impedance return path; completes avalanche conduction loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 surge waveforms up to 4 kV without external series impedance. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during transients - critical for safeguarding 3.3 V/5 V logic interfaced via level-shifters or isolated drivers. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for restricted substances in industrial and automotive production. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking - reduces manufacturing overhead and avoids moisture-induced popcorning. |
| 100% surge-tested | Each unit validated with 10/1000 μs waveform at rated IPPM - guarantees post-assembly reliability in mission-critical power entry stages. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤58.1 V, preventing latch-up or gate oxide damage in downstream 65 V-rated MOSFETs and PMICs. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface to shunt fast transients (<1 ns rise time) before reaching precision op-amps or ADC front-ends. Use Value: Maintains signal integrity by suppressing >8 kV contact ESD (IEC 61000-4-2) with sub-100 ps response and <1 μA leakage at 36 V. |
| Telecom DC Power Feeds | Consumer USB-C Power Delivery Lines |
Use Scenario: Safeguarding PoE-powered equipment (IEEE 802.3af/at) from lightning-induced surges on 48–57 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of hot-swap controllers and polyfuses in midspan injectors and PD modules. Use Value: Absorbs 1500 W surge energy without degradation, ensuring >100,000 surge cycles per MIL-STD-883H Method 3015.8. | Use Scenario: Overvoltage suppression on VBUS lines in USB-C ports supporting 20 V PD profiles, exposed to accidental AC adapter misconnection. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and GND to prevent catastrophic failure of USB-C controller ICs during 20 V ±10% overvoltage events. Use Value: Clamps 20 V overvoltage to 58.1 V within <1 ns, allowing downstream OVP circuitry time to disconnect while preserving port functionality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-M3/8A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR/VC ratings. | Suitable only for lower-energy threats (IEC 61000-4-2 ESD, not full IEC 61000-4-5 surge); limited thermal mass. | Select when board space is constrained and surge threat level is ≤1 kV line-to-ground. |
| SMCJ36CA-M3/9AT | Bidirectional variant; identical VWM (36 V), symmetric VBR (40.0–44.2 V), same PPPM/VC; no polarity marking. | Required for AC-coupled or floating signal lines where reverse polarity transients occur (e.g., RS-485, CAN bus). | Choose only if protecting bidirectional signals - unidirectional SMCJ36A-M3/9AT must not be substituted without circuit review. |
Compared with SMAJ36A-M3/8A, SMCJ36A-M3/9AT delivers 3.75× higher surge energy handling and superior thermal dissipation; versus SMCJ36CA-M3/9AT, it offers polarity-aware clamping essential for DC power rails but lacks AC symmetry - making selection dependent on signal topology and threat profile.
Availability
SMCJ36A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, telecom DC feeds, and consumer USB-C PD protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ36A-M3/9AT 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, ruggedness, and automotive qualification.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered specifically for ISO 7637-2, IEC 61000-4-5, and AEC-Q101-compliant applications where failure is not an option.
FAQ
What is the maximum clamping voltage of the SMCJ36A-M3/9AT under a 10/1000 μs surge?
The SMCJ36A-M3/9AT has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated peak pulse current (IPPM) of 25.8 A using the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The SMCJ36A-M3/9AT maintains this clamping performance across its full operating temperature range (−55 °C to +150 °C) with appropriate PCB copper area.
Is the SMCJ36A-M3/9AT AEC-Q101 qualified?
No, the SMCJ36A-M3/9AT is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free, RoHS-compliant commercial-grade construction. For AEC-Q101 qualification, the correct part is SMCJ36A-HM3/9AT - which adds automotive-grade screening, extended temperature validation, and enhanced surge cycle endurance. Always verify the full ordering code; SMCJ36A-M3/9AT is intended for industrial and commercial use, not automotive safety-critical systems.
How does the SMCJ36A-M3/9AT differ from the SMCJ36CA-M3/9AT?
The SMCJ36A-M3/9AT is unidirectional with a cathode band marking and conducts only in reverse bias, while the SMCJ36CA-M3/9AT is bidirectional - symmetrical in both directions with no polarity marking. Both share identical VWM (36 V), VBR (40.0–44.2 V), VC (58.1 V), and PPPM (1500 W), but the SMCJ36CA-M3/9AT is required for AC or floating signal lines like RS-485 or CAN. Substituting SMCJ36A-M3/9AT in such roles risks incomplete protection.
What is the thermal resistance junction-to-ambient for the SMCJ36A-M3/9AT?
The typical thermal resistance junction-to-ambient (RθJA) for the SMCJ36A-M3/9AT is 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pad per terminal, per Vishay's datasheet Figure 5 and Thermal Characteristics table. This value assumes still air conditions and defines the baseline for derating power dissipation above 25 °C ambient - for example, at 85 °C ambient, the usable PPPM drops to ~850 W to maintain TJ ≤ 150 °C.
Can the SMCJ36A-M3/9AT be used in place of the SMAJ36A-M3/8A?
The SMCJ36A-M3/9AT can replace the SMAJ36A-M3/8A only if higher surge energy handling (1500 W vs. 400 W) and improved thermal performance are needed - but not as a drop-in due to different packages (SMC vs. SMA) and PCB footprints. The SMCJ36A-M3/9AT requires larger copper pads and cannot fit the SMA land pattern. Layout redesign is mandatory; electrical compatibility alone does not ensure mechanical or thermal suitability. Always validate with actual surge testing in the target application.
SMCJ36A-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 25.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ36A-M3/9AT FAQ
1.How can I place an order for SMCJ36A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ36A-M3/9AT 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 SMCJ36A-M3/9AT reliable?
The price and inventory of SMCJ36A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ36A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ36A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ36A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ36A-M3/9AT?
SMCJ36A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ36A-M3/9AT 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 SMCJ36A-M3/9AT?
For technical support, including SMCJ36A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ36A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ36A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ36A-M3/9AT 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 SMCJ36A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ36A-M3/9AT?
All SMCJ36A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ36A-M3/9AT, 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 SMCJ36A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ36A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ36A-M3/9AT Tags
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