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Taiwan Semiconductor Corporation SMBJ36CA
- Part No.:
- SMBJ36CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36CA.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,341
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Product details
Overview
SMBJ36CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy 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 SMBJ36CA datasheet, SMBJ36CA pinout, SMBJ36CA application, or SMBJ36CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AA (SMB) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ 36 V), and thermal performance (RθJA = 55 °C/W).
Technical Context
The SMBJ36CA operates as a silicon avalanche diode with glass-passivated junction, enabling fast sub-nanosecond response to transients while maintaining stable clamping under repetitive surge stress. Its bidirectional configuration supports symmetrical protection on AC-coupled or floating lines without polarity dependency.
Designed for 10/1000 µs waveform surges, it delivers 600 W non-repetitive peak impulse power with clamping voltage tightly controlled at ≤58.1 V up to 10.8 A, and exhibits junction-to-ambient thermal resistance of 55 °C/W - critical for sustained operation in enclosed industrial enclosures or automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous DC or RMS voltage the device blocks without conduction; defines safe operating margin before clamping initiates. |
| VBR min/max | 40.0 / 44.2 V @ 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above normal operating voltage with margin against false triggering. |
| VC @ IPP | 58.1 V @ 10.8 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels (e.g., below 60 V rail tolerance). |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs event; enables robust protection against ISO 7637-2 Pulse 5a (load dump) surges. |
| ID @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off; prevents measurable power loss or signal distortion in high-impedance sensor interfaces. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or sealed industrial control cabinets. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass and J-STD-002 solderability; compatible with automated reflow assembly. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional symmetry means both terminals function identically).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | Either terminal serves as clamping node; no polarity constraint simplifies PCB layout on differential or floating buses. |
| Cathode band marking | Manufacturing orientation indicator | Present but non-functional in CA variants; used for traceability and alignment during automated placement - does not define polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates parameter drift in humid industrial environments (per J-STD-020 MSL level 1). |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (capacitive coupling); meets OEM automotive EMC requirements. |
| Fast response time | <1.0 ps - Limits voltage overshoot during ESD events (IEC 61000-4-2), protecting sensitive CAN, LIN, or RS-485 transceivers before damage occurs. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing and export to regulated markets. |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in fault conditions - required for industrial safety certifications (e.g., UL 508). |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 12 V supply lines feeding microcontrollers and driver ICs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed at board edge input filter stage, shunting surge energy to ground before reaching LDOs and MCU VDD pins. Use Value: Limits clamped voltage to ≤58.1 V during 10.8 A surge, preventing latch-up or gate oxide rupture in 3.3/5 V logic powered from buck-converted 12 V rails. |
Use Scenario: Safeguarding 24 V DC digital input channels against field-wiring induced surges (e.g., relay coil kickback, lightning-induced coupling). IC Role / Device Role / Timing Role: Primary surge suppression element across input terminals, coordinated with series current-limiting resistor and optocoupler input stage. Use Value: Withstands ≥600 W pulses while holding clamping voltage below 60 V - ensuring optocoupler LED and input comparator remain within absolute maximum ratings. |
| POE-Powered Network Switch Port | LED Streetlight Driver Board |
Use Scenario: Protecting IEEE 802.3af/at data + power pairs from ESD (±8 kV contact) and surge (IEC 61000-4-5 Level 3) during installation or lightning proximity. IC Role / Device Role / Timing Role: Common-mode TVS on each twisted pair, mounted adjacent to RJ45 connector to minimize inductance before Ethernet PHY magnetics. Use Value: Sub-1 ps response captures fast ESD edges; 58.1 V clamping prevents damage to PHY's 2.5 V or 3.3 V analog front-end circuits. |
Use Scenario: Shielding constant-current LED driver ICs from grid-side surges (e.g., switching transients from nearby motor loads or capacitor bank switching). IC Role / Device Role / Timing Role: Secondary-level protection on DC bus between PFC stage and buck/boost LED controller, placed after bulk capacitance. Use Value: 600 W rating absorbs repetitive 10/1000 µs surges common in outdoor lighting grids; low leakage avoids efficiency loss in high-voltage (≥36 V) string configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Unidirectional variant; same VWM (36 V), VBR (40.0–44.2 V), VC (58.1 V), but only clamps in one polarity - requires correct orientation on DC rails. | Restricted to unidirectional DC lines (e.g., 36 V supply input); unsuitable for AC-coupled or floating differential signals. | Select SMBJ36A only when polarity is fixed and board space allows orientation-aware placement; SMBJ36CA offers layout flexibility. |
| SMCJ36CA | Same VWM/VBR/VC specs but in larger DO-214AB (SMC) package; higher PPK (1500 W), lower RθJA (30 °C/W), and higher IPP (29.0 A). | Better suited for high-energy surge zones (e.g., main AC/DC input stage); requires larger PCB footprint and higher assembly cost. | Choose SMCJ36CA where surge threat level exceeds 600 W (e.g., outdoor telecom equipment); SMBJ36CA fits space-constrained secondary-side protection. |
Compared with SMBJ36A and SMCJ36CA, the SMBJ36CA uniquely balances bidirectional protection, compact DO-214AA footprint, and certified 600 W surge handling - making it optimal for mid-tier industrial I/O and automotive sub-systems where layout density and polarity-agnostic design are prioritized.
Availability
SMBJ36CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and PoE-powered network infrastructure requiring stable component supply and full compliance with ISO 7637-2 and RoHS standards.
Supply support for SMBJ36CA 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 semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMBJ series was developed specifically for surface-mount surge protection in space-constrained, high-reliability applications - emphasizing fast response, repeatable clamping, and compliance with automotive EMC standards like ISO 7637-2.
FAQ
What does the "CA" suffix indicate in SMBJ36CA?
The "CA" suffix denotes a bidirectional TVS configuration - meaning the SMBJ36CA provides symmetrical clamping in both polarities, unlike unidirectional "A" variants. This allows use on AC lines, differential signals, or floating DC nodes without concern for orientation during PCB layout or assembly.
Is SMBJ36CA compliant with automotive EMC standards?
Yes, SMBJ36CA meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (capacitive coupling), making it suitable for automotive body electronics, infotainment power inputs, and gateway module protection per OEM specifications.
What is the maximum clamping voltage of SMBJ36CA under surge conditions?
The SMBJ36CA has a maximum clamping voltage (VC) of 58.1 V at 10.8 A peak pulse current (IPP) using the standard 10/1000 µs waveform. This value is guaranteed across temperature and ensures protected ICs remain within safe operating voltage limits during surge events.
Can SMBJ36CA be used in place of SMBJ36A?
SMBJ36CA can replace SMBJ36A in most applications, but not vice versa - because SMBJ36CA is bidirectional while SMBJ36A is unidirectional. If the circuit is strictly DC with known polarity, SMBJ36A may reduce cost; however, SMBJ36CA eliminates orientation risk and supports future design reuse on AC or differential lines.
What is the thermal resistance profile of SMBJ36CA?
SMBJ36CA has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W and junction-to-case (RθJC) of 10 °C/W, measured in standard JEDEC low-effective-airflow conditions. These values enable reliable operation up to +150 °C junction temperature when mounted on 1-in² 1-oz copper pad with thermal vias.
SMBJ36CA 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:
- -
- Bidirectional Channels:
- 2
- 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)
SMBJ36CA FAQ
1.How can I place an order for SMBJ36CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36CA 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 SMBJ36CA reliable?
The price and inventory of SMBJ36CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36CA is usually 5 days.
3.What payment methods are accepted for SMBJ36CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36CA?
SMBJ36CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36CA 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 SMBJ36CA?
For technical support, including SMBJ36CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36CA requirements.
6.How does Aetrix verify that SMBJ36CA is sourced from the original manufacturer or authorized distributors?
All SMBJ36CA 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 SMBJ36CA meets industry standards.
7.What is the process for return or replacement of SMBJ36CA?
All SMBJ36CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36CA, 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 SMBJ36CA part is unused and in its original packaging.
Return procedure for SMBJ36CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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