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Diodes Incorporated SMAJ36CA-13
- Part No.:
- SMAJ36CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CA-13.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,905
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Product details
Overview
SMAJ36CA-13 from Diodes Incorporated is a bi-directional 400W surface-mount transient voltage suppressor (TVS) diode designed for clamping ESD and surge transients on data lines and power rails. It features a 36V reverse standoff voltage (VRWM), 40.0–44.2V breakdown range (VBR @ 1mA), 58.1V max clamping voltage at 6.9A peak pulse current (IPP), and operates from –55°C to +150°C - deployed in industrial Ethernet port protection and automotive infotainment I/O interfaces.
For engineers reviewing the SMAJ36CA-13 datasheet, SMAJ36CA-13 pinout, SMAJ36CA-13 application, or SMAJ36CA-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, bidirectional symmetry for AC-coupled lines, JEDEC-compliant 8.3ms surge rating, and SMA package thermal performance under PCB trace inductance constraints.
Technical Context
This bi-directional TVS uses glass-passivated silicon junctions to achieve sub-nanosecond response time and stable clamping across temperature. Its symmetrical avalanche structure enables identical forward/reverse breakdown behavior, eliminating polarity concerns in differential or AC signal paths.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements when mounted with low-inductance layout. Derating curves confirm 400W peak pulse power is valid only at TA = 25°C, with linear reduction to ~250W at 100°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 8.3ms half-sine surge without failure; defines maximum transient energy absorption capability. |
| Reverse Standoff Voltage (VRWM) | 36 V - maximum continuous DC or RMS voltage before significant leakage; sets upper limit for protected line operating voltage. |
| Breakdown Voltage (VBR) | 40.0–44.2 V @ 1 mA - voltage at which avalanche conduction begins; ensures reliable turn-on before downstream IC damage threshold. |
| Max Clamping Voltage (VC) | 58.1 V @ 6.9 A IPP - peak voltage seen by protected circuit during worst-case surge; must stay below IC absolute maximum ratings. |
| Peak Pulse Current (IPP) | 6.9 A - calculated as PPK / VC; quantifies surge current handling capacity under standardized 8.3ms waveform. |
| Operating Temperature | –55°C to +150°C - validated junction temperature range; supports under-hood automotive and industrial control environments. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band omitted (bi-directional). Terminals are solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional avalanche terminals | No polarity distinction; either terminal serves as clamping node for positive or negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable, low-leakage avalanche characteristics over lifetime and temperature cycling. |
| 400W peak pulse power rating | Supports IEC 61000-4-5 Level 3 (1kV/2Ω) surge protection without derating on standard FR4 layouts. |
| Bi-directional configuration (suffix "C") | Eliminates orientation errors during placement and enables protection of AC-coupled or differential buses (e.g., RS-485, USB D+/D–). |
| RoHS-compliant matte tin finish | Ensures compatibility with lead-free reflow profiles and eliminates post-soldering whisker risk. |
Applications
| Industrial Ethernet Port Protection | Automotive Infotainment I/O |
|---|---|
Use Scenario: Protects RJ45 PHY interface against ESD events and lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between PHY transceiver pins and connector, shunting transients to ground. Use Value: Maintains signal integrity by clamping to ≤58.1V while preserving <100nA leakage at 36V, avoiding false triggering during normal operation. |
Use Scenario: Shields USB 2.0 and HDMI hot-plug detection lines in head unit systems exposed to vehicle-level load dump and jump-start transients. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on low-voltage I/O rails (<5.5V), placed adjacent to connector entry point. Use Value: Prevents latch-up in USB controller ICs by limiting transient overshoot to safe levels within 1ns response window. |
| Programmable Logic Controller (PLC) Digital Inputs | Smart Meter Communication Interfaces |
Use Scenario: Guards 24V DC digital input channels against field-wiring induced surges and inductive kickback from solenoid loads. IC Role / Device Role / Timing Role: Primary surge suppression device in series with optocoupler input, absorbing energy before isolation barrier. Use Value: Withstands repeated 40A 8.3ms surges (per JEDEC test) without parameter shift, ensuring long-term reliability in factory automation. |
Use Scenario: Secures PLC/RF module communication lines (e.g., M-Bus, NB-IoT antenna feed) against meter cabinet ESD and grid switching noise. IC Role / Device Role / Timing Role: Secondary-level transient suppressor co-located with EMI filter, reducing high-frequency ringback after primary MOV clamping. Use Value: Low junction capacitance (~25pF at 0V) avoids signal attenuation on 100kHz–1MHz communication bands used in utility metering protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA-13 | Same VRWM and VBR, but 600W PPK rating in larger SMB package; 20% higher thermal mass. | Better suited for higher-energy surges or elevated ambient temperatures (>85°C). | Select when board space allows SMB footprint and surge threat level exceeds 400W. |
| SMCJ36CA-13 | Same electrical specs, 1500W PPK rating in SMC package; significantly higher clamping consistency at >10A IPP. | Required for IEC 61000-4-5 Level 4 (2kV/2Ω) or repetitive surge environments. | Choose when system-level testing demands >1000W surge margin or extended lifecycle under frequent transients. |
Compared with SMBJ36CA-13 and SMCJ36CA-13, SMAJ36CA-13 offers optimal balance of compact size, cost, and 400W surge capability - ideal for space-constrained consumer and industrial designs where Level 3 immunity suffices.
Availability
SMAJ36CA-13 is available at Aetrix Electronics and suitable for industrial Ethernet port protection, automotive infotainment I/O, and PLC digital input circuits requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMAJ36CA-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, automotive, and computing markets.
SMAJxxCA devices belong to Diodes' TVS Diode portfolio, engineered specifically for robust, surface-mount transient suppression in space-constrained, high-volume applications demanding JEDEC-validated surge performance.
FAQ
Is SMAJ36CA-13 unidirectional or bi-directional?
SMAJ36CA-13 is bi-directional, indicated by the "C" suffix in the part number. It provides symmetrical clamping for both positive- and negative-going transients without polarity sensitivity, making it suitable for AC-coupled or differential signal lines such as RS-485 or USB.
What is the maximum clamping voltage at rated peak pulse current?
The maximum clamping voltage (VC) is 58.1 V at 6.9 A peak pulse current (IPP), measured under the standardized 8.3 ms half-sine waveform per JEDEC. This value defines the highest voltage imposed on the protected circuit during a full-rated surge event.
Does SMAJ36CA-13 meet RoHS requirements?
Yes - SMAJ36CA-13 features a matte tin lead finish and complies with RoHS Directive 2011/65/EU, including exemptions for high-temperature soldering and glass components as defined in Annexes V and VI of the EU directive.
How does ambient temperature affect its surge capability?
Ambient temperature directly reduces peak pulse power capability: at 100°C ambient, the 400W rating derates to approximately 250W per the published pulse derating curve. Layout must ensure low thermal resistance to PCB copper to maintain performance near rated limits.
SMAJ36CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 6.9A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMAJ)
SMAJ36CA-13 FAQ
1.How can I place an order for SMAJ36CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CA-13 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 SMAJ36CA-13 reliable?
The price and inventory of SMAJ36CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CA-13 is usually 5 days.
3.What payment methods are accepted for SMAJ36CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CA-13?
SMAJ36CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CA-13 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 SMAJ36CA-13?
For technical support, including SMAJ36CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CA-13 requirements.
6.How does Aetrix verify that SMAJ36CA-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ36CA-13 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 SMAJ36CA-13 meets industry standards.
7.What is the process for return or replacement of SMAJ36CA-13?
All SMAJ36CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CA-13, 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 SMAJ36CA-13 part is unused and in its original packaging.
Return procedure for SMAJ36CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36CA-13 Tags
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ESD9B5.0ST5G
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