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Taiwan Semiconductor Corporation SMBJ36
- Part No.:
- SMBJ36
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36.pdf
- Description:
- 600W, 44.5V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,630
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Product details
Overview
SMBJ36 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 36V working stand-off voltage (VWM), and 64.3V maximum clamping voltage (VC) at 9.8A peak impulse current - designed to protect automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ36 datasheet, SMBJ36 pinout, SMBJ36 application, or SMBJ36 equivalent, this page delivers verified electrical parameters, clamping performance under 10/1000µs surge, thermal resistance data (RθJA = 55°C/W), polarity marking convention, and direct alternatives with documented VBR, IPP, and VC differences.
Technical Context
The SMBJ36 operates as a unidirectional avalanche diode with glass-passivated junction, delivering sub-1ps response time and <1µA blocking leakage above 10V. Its breakdown voltage is specified at 40.0–48.9V (IT = 1mA), ensuring reliable turn-on before system-level damage occurs during fast EFT or load-dump events.
Thermal design is supported by RθJC = 10°C/W and RθJA = 55°C/W, enabling sustained operation up to TJ = +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, confirming suitability for high-reliability PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR min/max | 40.0 / 48.9 V @ IT = 1 mA - Ensures consistent avalanche initiation across production lots; critical for timing of protection activation. |
| VC @ IPP | 64.3 V @ 9.8 A (10/1000µs) - Clamped voltage seen by protected IC; determines minimum safe headroom for downstream components. |
| PPK | 600 W - Peak non-repetitive surge power handling; validates compliance with ISO 7637-2 Pulse 3b (50Ω source). |
| ID @ VWM | ≤1 µA - Low leakage preserves signal integrity and battery life in always-on circuits like CAN wake-up receivers. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and enclosed industrial enclosures without derating. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; forms clamping loop with cathode to rail. |
| Cathode | Protected line input | Connected to supply rail (e.g., 24V battery line); absorbs positive transients via avalanche conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR over temperature and lifetime; eliminates passivation-related drift in harsh environments. |
| Sub-1ps response time | Clamps transients before sensitive logic or analog circuitry experiences overvoltage stress - critical for CAN FD and LIN bus protection. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT), eliminating need for external test validation. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives; supports lead-free reflow profiles and green manufacturing requirements. |
Applications
| Automotive Power Rail Protection | Industrial I/O Interface Protection |
|---|---|
Use Scenario: 24V battery line in engine control unit exposed to load-dump pulses up to 60V and 100ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC converter input to clamp surges before regulator stage. Use Value: Limits voltage to ≤64.3V during 9.8A transients, preventing overvoltage failure of 75V-rated input capacitors and MOSFETs. |
Use Scenario: RS-485 transceiver port on PLC module subjected to ESD ±8kV contact discharge and EFT bursts. IC Role / Device Role / Timing Role: Primary front-end clamping device on VCC and signal lines, absorbing energy before internal ESD structures activate. Use Value: Sub-1ps response ensures clamping precedes transceiver's internal 100ns ESD diode turn-on, reducing cumulative stress on PHY layer. |
| LED Driver Supply Protection | Smart Sensor Node Power Input |
Use Scenario: Constant-current LED driver in streetlight fixture experiencing inductive switching spikes from relay-controlled ballasts. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to shunt repetitive 100V/100ns spikes generated by relay coil de-energization. Use Value: 600W PPK rating sustains >10,000 surge events without degradation; 1µA leakage avoids standby current penalty. |
Use Scenario: Battery-powered IoT sensor node with integrated MCU and BLE radio, powered via USB-C PD negotiation. IC Role / Device Role / Timing Role: Standoff protection on VBUS input to prevent overvoltage damage during PD contract negotiation glitches or cable hot-plug transients. Use Value: 36V VWM aligns with USB PD 3.0 27W profile (9V@3A), allowing safe operation while clamping 40V+ faults to 64.3V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | VBR = 40.0–44.2V (tighter tolerance), VC = 58.1V @ 10.8A - lower clamping voltage but reduced surge margin. | Better for low-voltage-tolerant loads (e.g., 3.3V LDO inputs) where 58.1V clamping is acceptable; less margin for high-energy pulses. | Select SMBJ36A when system-level testing confirms 58.1V clamping is sufficient and tighter VBR distribution improves yield. |
| SMAJ36A | Lower PPK = 400W, same VWM/VBR/VC; RθJA = 65°C/W - reduced surge capacity and higher thermal resistance. | Suitable only for non-automotive, low-duty-cycle applications (e.g., consumer appliance I/O); fails ISO 7637-2 Pulse 1 validation. | Choose SMAJ36A only if board space constraints prohibit SMB footprint and surge energy is limited to <400W per event. |
Compared with SMBJ36, SMBJ36A offers tighter VBR control and lower clamping but sacrifices peak current handling; SMAJ36A reduces cost and size but cannot sustain automotive-grade transients - making SMBJ36 the optimal balance of robustness, thermal performance, and standard compliance.
Availability
SMBJ36 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial I/O interface hardening, and LED driver supply stabilization requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ36 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, and power devices since 1979.
The SMBJ series was developed specifically for automotive and industrial transient immunity, emphasizing ISO 7637-2 compliance, high-temperature reliability, and automated SMT compatibility in DO-214AA packaging.
FAQ
What is the maximum clamping voltage of SMBJ36 under standardized surge conditions?
The SMBJ36 exhibits a maximum clamping voltage (VC) of 64.3 V when subjected to a 10/1000 µs waveform at 9.8 A peak impulse current, as confirmed in Taiwan Semiconductor's R2104 datasheet. This value defines the upper voltage limit imposed on protected circuitry during transient events and is measured at TA = 25°C with specified test conditions. Designers must ensure downstream components tolerate ≥64.3 V for reliable operation.
Is SMBJ36 suitable for bidirectional transient protection?
No, SMBJ36 is a unidirectional TVS diode intended for protection of positive-polarity transients only. For bidirectional applications, the SMBJ36C or SMBJ36CA variant must be used - these include symmetrical breakdown characteristics in both directions and are explicitly designated in the ordering code. Using SMBJ36 in reverse-biased configurations risks permanent breakdown due to lack of reverse avalanche rating.
What is the thermal resistance from junction to ambient for SMBJ36?
The SMBJ36 has a junction-to-ambient thermal resistance (RθJA) of 55°C/W under standard JEDEC test conditions (single device on 1-inch² copper pad). This value assumes no additional heatsinking and is critical for calculating maximum power dissipation at elevated ambient temperatures. At TA = 85°C, the device's usable PPK drops to ~420W per Fig.2 derating curve - a key constraint for high-temperature automotive deployments.
Does SMBJ36 comply with automotive EMC standards?
Yes, SMBJ36 is explicitly validated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (electrical fast transients). This compliance is stated in the "FEATURES" section of the R2104 datasheet and confirmed through standardized test waveforms - eliminating need for external qualification when used per recommended layout guidelines.
What marking code identifies SMBJ36 on the device body?
The SMBJ36 is marked with the code "MN" on its DO-214AA (SMB) package body, as listed in the Electrical Specifications table on page 3 of the R2104 datasheet. This two-character laser marking appears adjacent to the cathode band and is used for visual identification and traceability during assembly and field failure analysis.
SMBJ36 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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):
- 9.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ36 FAQ
1.How can I place an order for SMBJ36 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36 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 SMBJ36 reliable?
The price and inventory of SMBJ36 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36 is usually 5 days.
3.What payment methods are accepted for SMBJ36?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36?
SMBJ36 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36 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 SMBJ36?
For technical support, including SMBJ36 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36 requirements.
6.How does Aetrix verify that SMBJ36 is sourced from the original manufacturer or authorized distributors?
All SMBJ36 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 SMBJ36 meets industry standards.
7.What is the process for return or replacement of SMBJ36?
All SMBJ36 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36, 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 SMBJ36 part is unused and in its original packaging.
Return procedure for SMBJ36:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ36 Tags
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