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Taiwan Semiconductor Corporation SMCJ36
- Part No.:
- SMCJ36
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ36.pdf
- Description:
- 1500W, 44.5V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:2,973
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Product details
Overview
SMCJ36 from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 36V working stand-off voltage (VWM), 40–48.9V breakdown voltage (VBR), and 64.3V maximum clamping voltage (VC) at 24A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ36 datasheet, SMCJ36 pinout, SMCJ36 application, or SMCJ36 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 2b/5a, junction temperature derating above 25°C, unidirectional polarity marking, and compatibility with automated SMT placement on 1.5mm-thick PCBs per J-STD-020 Level 1 moisture sensitivity.
Technical Context
The SMCJ36 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (40–48.9V @ 1mA). It clamps transients to ≤64.3V within <1.0ps response time, dissipating up to 1500W peak pulse power (tp = 1ms) while maintaining <1μA leakage at 36V.
Thermal design relies on RθJA = 55°C/W and RθJC = 10°C/W, supporting operation from –55°C to +150°C junction temperature. Its glass-passivated junction and matte tin-plated leads meet JESD201 Class 2 whisker resistance and RoHS/halogen-free compliance per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 40 / 48.9 V @ 1 mA - Ensures reliable turn-on margin above VWM with ±12% tolerance |
| VC @ IPPM | 64.3 V @ 24 A - Clamping voltage during 10/1000μs surge defines protected circuit's max stress level |
| PPK | 1500 W - Peak pulse power rating determines survivability against ISO 7637-2 Pulse 5a (load dump) |
| IR @ VWM | <1 μA - Ultra-low leakage preserves battery-backed or high-impedance signal integrity |
| TJ max | +150 °C - Enables use in under-hood automotive environments without thermal shutdown |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); marked by band - must align with PCB silkscreen polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR over 1000+ surge cycles and prevents moisture-induced parameter drift |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line transients) |
| Fast response time <1.0 ps | Clamps EFT bursts before sensitive ICs experience latch-up or gate oxide damage |
| J-STD-020 Level 1 MSL | Zero bake requirement prior to reflow - supports standard lead-free assembly without moisture-related popcorning |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V battery-fed ECU power input subjected to load-dump surges up to 35V for 400ms per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground to clamp overshoot before DC-DC converter input stage. Use Value: Limits voltage to ≤64.3V during 1500W transient, preventing overvoltage failure of 36V-rated input capacitors and MOSFETs. | Use Scenario: 24V digital input module exposed to inductive kickback from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: SMCJ36 installed across input terminals to absorb 200A surge currents (IFSM rating) without degradation. Use Value: Maintains <1μA leakage at 24V nominal, ensuring clean logic-level detection while surviving repeated 10/1000μs transients. |
| LED Driver Overvoltage Clamp | Telecom Line Interface Protection |
Use Scenario: Constant-current LED driver board powered from 36V supply, vulnerable to back-EMF from hot-plug connectors. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt fast-rising transients before driver IC and current-sense resistor. Use Value: 64.3V clamping ensures LED string and PWM controller remain below absolute maximum ratings during 1ms surges. | Use Scenario: Low-voltage telecom interface (e.g., RS-485 transceiver) sharing power rail with motor control circuits. IC Role / Device Role / Timing Role: SMCJ36 used on VCC line to suppress coupled transients from adjacent noisy traces or shared ground bounce. Use Value: 55°C/W thermal resistance allows safe operation at 70°C ambient without derating, critical for sealed enclosure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | 600W PPK rating, SMB package (smaller footprint), lower VC = 58.1V @ 27A | Better suited for space-constrained consumer electronics; insufficient for ISO 7637-2 Pulse 5a automotive load dump | Select SMCJ36 when 1500W surge handling and DO-214AB mechanical robustness are required |
| 1.5KE36A | Through-hole TO-218 package, same 36V VWM but higher VC = 69.4V @ 22A, slower response (~1ns) | Requires wave soldering; unsuitable for high-density SMT boards or automated placement | Choose SMCJ36 for SMT scalability, faster clamping, and J-STD-020 Level 1 compatibility |
Compared with SMBJ36A and 1.5KE36A, the SMCJ36 delivers 2.5× higher peak power handling in an SMT-optimized package with sub-picosecond response - making it the preferred choice for automotive-grade 12V/24V rail protection where layout density and surge margin are critical.
Availability
SMCJ36 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, LED driver power stages, and telecom interface protection requiring stable component supply across extended temperature ranges and high-reliability surge events.
Supply support for SMCJ36 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.
The SMCJ series is part of TSC's high-power transient suppression product line, engineered specifically for automotive, industrial, and transportation systems demanding ISO 7637-2 and IEC 61000-4-5 compliance with zero derating up to +125°C ambient.
FAQ
What is the clamping voltage of SMCJ36 under a standard 10/1000μs surge?
The SMCJ36 has a maximum clamping voltage (VC) of 64.3 V when subjected to a 24 A peak pulse current with a 10/1000μs waveform. This value is measured per Fig.5 in the official datasheet and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMCJ36 unidirectional or bidirectional, and how is polarity identified?
The SMCJ36 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. Polarity is marked by a cathode band on the DO-214AB package body - the banded end connects to the protected line (e.g., 12V rail), while the anode connects to ground. Bidirectional variants (e.g., SMCJ36C) are separate orderable parts with symmetrical characteristics.
Does SMCJ36 meet automotive transient immunity standards?
Yes, the SMCJ36 meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling), as explicitly stated in the features section of the Taiwan Semiconductor datasheet. Its 1500W peak power rating and fast <1.0ps response make it suitable for load-dump (Pulse 5a) protection when properly heatsinked.
What is the maximum steady-state power dissipation (PD) for SMCJ36 at 25°C?
The SMCJ36 has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency reverse bias conditions - not transient surges. For sustained operation, thermal design must ensure junction temperature remains ≤150°C using RθJA = 55°C/W.
Can SMCJ36 be used in place of SMCJ36A?
No - SMCJ36 and SMCJ36A are distinct variants. The SMCJ36A has tighter VBR tolerance (40–44.2 V vs. 40–48.9 V), lower clamping voltage (58.1 V vs. 64.3 V), and higher IPPM (27 A vs. 24 A). Substituting SMCJ36 for SMCJ36A may result in elevated clamping stress on downstream components and reduced surge margin in precision applications.
SMCJ36 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
SMCJ36 FAQ
1.How can I place an order for SMCJ36 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ36 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 SMCJ36 reliable?
The price and inventory of SMCJ36 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ36 is usually 5 days.
3.What payment methods are accepted for SMCJ36?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ36 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ36?
SMCJ36 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ36 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 SMCJ36?
For technical support, including SMCJ36 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ36 requirements.
6.How does Aetrix verify that SMCJ36 is sourced from the original manufacturer or authorized distributors?
All SMCJ36 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 SMCJ36 meets industry standards.
7.What is the process for return or replacement of SMCJ36?
All SMCJ36 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ36, 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 SMCJ36 part is unused and in its original packaging.
Return procedure for SMCJ36:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ36 Tags
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