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Taiwan Semiconductor Corporation SMBJ36A
- Part No.:
- SMBJ36A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36A.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,012
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Product details
Overview
SMBJ36A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 36 V working stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 58.1 V maximum clamping voltage (VC) at 10.8 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive body electronics, industrial I/O modules, and PoE-powered devices.
For engineers reviewing the SMBJ36A datasheet, SMBJ36A pinout, SMBJ36A application, or SMBJ36A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, unidirectional polarity marking, DO-214AA (SMB) package thermal limits (RθJA = 55 °C/W), and leakage current ≤1 µA at 36 V.
Technical Context
The SMBJ36A operates as a unidirectional avalanche diode, triggered when transient voltage exceeds its 40.0–44.2 V breakdown threshold under 1 mA test current. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at VWM), while the DO-214AA package supports automated placement and meets JESD201 Class 2 whisker resistance.
Thermal design relies on RθJC = 10 °C/W and RθJA = 55 °C/W ratings, enabling reliable operation up to TJ = +150 °C. It complies with ISO 7637-2 for automotive load-dump immunity and delivers 58.1 V clamping at 10.8 A (10/1000 µs waveform), limiting downstream voltage stress during fast transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR @ IT = 1 mA | 40.0–44.2 V - Breakdown voltage range defining turn-on threshold for transient suppression. |
| VC @ IPP = 10.8 A | 58.1 V - Clamped voltage seen by protected circuit during 10/1000 µs surge; determines max stress on downstream ICs. |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs transient, derated above 25 °C ambient. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; critical for low-power sensor or battery-backed circuits. |
| Response time | <1.0 ps - Time from overvoltage onset to clamping initiation; ensures protection before IC damage occurs. |
| TJ max | +150 °C - Maximum junction temperature; defines thermal margin for PCB layout and power cycling. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, UL 94V-0 molding compound, 0.090 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms current path during clamping event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 36 V supply); marked with band; conducts when line voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 % typical), low leakage, and long-term reliability under thermal cycling. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) - essential for automotive ECUs. |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates moisture-related popcorning risk during assembly. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives; suitable for consumer, industrial, and automotive supply chains with strict material compliance requirements. |
| Fast response & low clamping | <1.0 ps turn-on and 58.1 V VC at 10.8 A enable protection of 3.3 V/5 V logic interfaces and microcontrollers without overvoltage damage. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects 12 V/24 V power inputs and LIN/CAN bus lines from load-dump spikes and ESD events in door modules, lighting controllers, and seat control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping transients before they reach MCU power pins or communication transceivers. Use Value: Limits peak voltage to 58.1 V during ISO 7637-2 Pulse 1 (35 V, 100 ms), preventing latch-up or gate oxide damage in 36 V-rated power management ICs. |
Use Scenario: Shields 24 V digital input channels from field-induced surges, relay coil flyback, and EFT bursts in factory automation systems. IC Role / Device Role / Timing Role: Front-end protection element on optocoupler input side, absorbing 1 kV/50 Ω EFT pulses per IEC 61000-4-4 Level 4. Use Value: Delivers sub-1 ps response and 58.1 V clamping to keep input voltage below optocoupler CTR degradation threshold and prevent false triggering. |
| Power over Ethernet (PoE) PSE Interface | LED Driver Power Input |
Use Scenario: Safeguards IEEE 802.3af/at PSE controller ICs and sense resistors from cable discharge events and lightning-induced surges on 48 V power pairs. IC Role / Device Role / Timing Role: Unidirectional clamp on primary-side DC feed, positioned upstream of DC-DC converter input capacitors. Use Value: Withstands 600 W peak pulse and maintains <1 µA leakage at 36 V, ensuring no impact on PoE classification accuracy or power budgeting. |
Use Scenario: Protects constant-current LED driver ICs from inductive kickback during dimming MOSFET switching and AC line transients in streetlight drivers. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk input capacitor, shunting energy from 10/1000 µs surges before reaching driver IC's VIN pin. Use Value: 58.1 V clamping prevents overvoltage shutdown of drivers rated for 60 V max input, extending system uptime in outdoor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Bidirectional variant; symmetric VBR (40.0–44.2 V) in both directions; same VWM, VC, and PPK ratings. | Required where AC-coupled signals or dual-polarity transients (e.g., RS-485, CAN bus) need protection without polarity dependency. | Select SMBJ36CA only if bidirectional clamping is required; SMBJ36A is optimal for DC rails with defined polarity. |
| SAC36 | Same VWM (36 V) and VC (58.1 V), but lower PPK (400 W); smaller DO-214AC (SMA) package; higher RθJA (75 °C/W). | Suitable for space-constrained, lower-energy surge environments (e.g., consumer USB ports), not automotive or industrial high-energy transients. | Choose SAC36 only for cost-sensitive, low-power applications; SMBJ36A provides superior 600 W surge margin and thermal performance. |
Compared with SMBJ36CA and SAC36, the SMBJ36A offers optimal balance of unidirectional precision, 600 W surge capacity, and DO-214AA thermal robustness - making it the preferred choice for 36 V DC power rail protection where polarity is fixed and energy levels exceed 400 W.
Availability
SMBJ36A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and PoE-powered equipment requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMBJ36A 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 components.
The SMBJ series was developed for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - emphasizing ISO 7637-2 compliance, tight VBR tolerance, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMBJ36A at its rated peak pulse current?
The SMBJ36A has a maximum clamping voltage (VC) of 58.1 V when subjected to a 10.8 A peak impulse current (IPP) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ36A suitable for bidirectional signal line protection?
No, SMBJ36A is a unidirectional TVS diode intended for DC power rail or single-polarity signal protection. For bidirectional applications such as RS-485, CAN, or AC-coupled interfaces, the SMBJ36CA variant must be used - it provides symmetrical clamping in both directions with identical VBR and VC specifications.
What is the maximum operating junction temperature for SMBJ36A?
The SMBJ36A has a maximum junction temperature (TJ) rating of +150 °C, verified per absolute maximum ratings. This allows reliable operation in under-hood automotive environments and enclosed industrial enclosures, provided PCB copper area and airflow support thermal dissipation per its RθJA = 55 °C/W specification.
Does SMBJ36A meet automotive surge immunity standards?
Yes, SMBJ36A is explicitly validated to meet ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 600 W peak power rating and 58.1 V clamping voltage ensure compliance in 12 V and 24 V vehicle electrical systems.
What packaging and reel quantity is offered for SMBJ36A?
SMBJ36A is supplied in DO-214AA (SMB) package on tape-and-reel format, with 3,000 units per reel. The matte tin-plated leads comply with J-STD-002 for solderability, and the moisture sensitivity level is rated at Level 1 per J-STD-020 - enabling standard SMT reflow without pre-baking.
SMBJ36A 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:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 10.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ36A FAQ
1.How can I place an order for SMBJ36A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36A 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 SMBJ36A reliable?
The price and inventory of SMBJ36A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36A is usually 5 days.
3.What payment methods are accepted for SMBJ36A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36A?
SMBJ36A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36A 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 SMBJ36A?
For technical support, including SMBJ36A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36A requirements.
6.How does Aetrix verify that SMBJ36A is sourced from the original manufacturer or authorized distributors?
All SMBJ36A 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 SMBJ36A meets industry standards.
7.What is the process for return or replacement of SMBJ36A?
All SMBJ36A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36A, 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 SMBJ36A part is unused and in its original packaging.
Return procedure for SMBJ36A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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