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Diodes Incorporated SMAJ36CA-13-F
- Part No.:
- SMAJ36CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CA-13-F.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:81,312
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Product details
Overview
SMAJ36CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 36V reverse standoff voltage (VRWM), 40.0–44.2V breakdown voltage (VBR), 58.1V maximum clamping voltage (VC) at 6.9A peak pulse current (IPP), and operates across –55°C to +150°C. It is widely deployed in automotive infotainment power inputs and industrial sensor interface circuits.
For engineers reviewing the SMAJ36CA-13-F datasheet, SMAJ36CA-13-F pinout, SMAJ36CA-13-F application, or SMAJ36CA-13-F equivalent, key selection criteria include clamping performance under 8.3ms surge, unidirectional/bidirectional configuration matching, SMA package thermal derating, and compliance with AEC-Q101 for automotive-grade reliability.
Technical Context
This bidirectional TVS diode uses glass-passivated silicon junction construction to achieve fast response time (<1 ps) and stable clamping under repetitive transients. Its symmetrical I-V characteristic enables protection against both positive and negative polarity surges without external polarity management.
The device is rated for 400W non-repetitive peak pulse power (PPK) at TA = 25°C, with linear derating above 25°C per Fig. 1 - delivering ~275W at 75°C ambient. Steady-state power dissipation is limited to 1.0W at TL = 75°C, requiring careful PCB copper area design for thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms half-sine surge without failure; derates linearly above 25°C ambient |
| Reverse Standoff Voltage | 36V - maximum continuous DC or RMS voltage before significant leakage; defines operating rail margin |
| Breakdown Voltage | 40.0–44.2V @ 1.0mA - onset of avalanche conduction; ensures reliable triggering above normal operating voltage |
| Clamping Voltage | 58.1V @ 6.9A IPP - limits downstream voltage during surge; critical for IC-level ESD/ISO 7637-2 compliance |
| Leakage Current | <5.0µA @ 36V - negligible standby power loss; avoids false triggering in low-power sensor nodes |
| Operating Temp Range | –55°C to +150°C - qualified for 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 due to bidirectional configuration; weight ≈ 0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals - no polarity dependency; connects across protected line and ground or between differential lines |
| Case / Body | Thermal mass & mechanical anchor | Non-electrical; requires ≥10mm² 2oz copper pad for effective heat spreading per Fig. 6 derating curve |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables protection against ISO 7637-2 Pulse 1 (inductive load dump) and IEC 61000-4-5 Combination Wave surges up to 4kV |
| Glass-passivated die | Ensures long-term parameter stability and resistance to humidity-induced degradation in harsh environments |
| Bidirectional configuration | Eliminates need for polarity-aware layout; supports AC-coupled interfaces and dual-rail protection with single device |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU; matte tin plating ensures reliable solderability per MIL-STD-202, Method 208 |
Applications
| Automotive Infotainment Power Input | Industrial RS-485 Data Line Protection |
|---|---|
Use Scenario: Protects 12V supply rail of head unit against load dump transients (up to 120V, 400ms) and jump-start spikes. IC Role / Device Role: Primary clamping element placed between input fuse and DC-DC converter input capacitor. Use Value: Limits voltage to ≤58.1V during 6.9A surge, preventing damage to downstream LDOs and microcontrollers. |
Use Scenario: Shields RS-485 transceiver (e.g., MAX1487) from ESD events and cable-induced surges in factory automation networks. IC Role / Device Role: Bidirectional shunt clamp across differential pair (A/B) and ground reference plane. Use Value: Clamps ±15kV contact ESD (IEC 61000-4-2) while maintaining <5µA leakage to preserve bus bias integrity. |
| Smart Meter AC/DC Auxiliary Supply | Medical Patient Monitor Sensor Interface |
Use Scenario: Safeguards auxiliary 5V rail derived from mains-connected SMPS against lightning-induced surges on utility-side traces. IC Role / Device Role: Secondary overvoltage clamp after primary MOV, providing precise low-clamp backup protection. Use Value: Delivers tighter clamping (58.1V) than MOV-only solutions, reducing stress on optocouplers and isolated ADC references. |
Use Scenario: Protects analog front-end inputs (e.g., ECG leads) from defibrillator discharge pulses and hospital-grade ESD. IC Role / Device Role: Low-capacitance (≈100pF at 1MHz) bidirectional clamp on high-impedance biopotential paths. Use Value: Maintains signal fidelity with minimal added capacitance while suppressing >5kV transients per IEC 60601-1 Clause 8.8.3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-13-F | Unidirectional version; same VRWM, VBR, VC, and IPP but conducts only in one polarity | Requires correct orientation on PCB; unsuitable for AC or differential signal protection | Select when protecting single-polarity DC rails where polarity is fixed and known |
| SMBJ36CA | Same electrical specs but SMB (DO-214AA) package - 25% larger footprint and higher thermal resistance (RθJA ≈ 100°C/W vs. SMA's 120°C/W) | Better surge energy handling margin due to larger junction mass; less board-space efficient | Prefer for high-reliability industrial designs where thermal margin outweighs size constraints |
Compared with SMAJ36A-13-F, this bidirectional variant eliminates orientation risk in layout; versus SMBJ36CA, it trades 15% lower thermal resistance for 30% smaller PCB area - making it optimal for space-constrained automotive modules.
Availability
SMAJ36CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial communication interfaces, and medical sensor front-ends requiring stable component supply and AEC-Q101-aligned reliability.
Supply support for SMAJ36CA-13-F 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where compact size and AEC-Q101 qualification are mandatory.
FAQ
What is the difference between SMAJ36CA-13-F and SMAJ36A-13-F?
SMAJ36CA-13-F is bidirectional, meaning it clamps voltage surges of either polarity symmetrically across its terminals; SMAJ36A-13-F is unidirectional and only clamps positive surges relative to its cathode. The "C" suffix explicitly denotes bidirectionality, and the devices are not interchangeable without verifying circuit polarity requirements and layout compatibility.
Does SMAJ36CA-13-F meet AEC-Q101 requirements?
No - SMAJ36CA-13-F is the standard industrial-grade version. Diodes offers an automotive-qualified variant, SMAJ36CAQ-13-F, which is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949 certified facilities. That part is documented separately under datasheet DS19005Q.
What is the recommended PCB pad layout for thermal performance?
Per Diodes' package outline and Fig. 6, use a minimum 10 mm² (e.g., 3.2 × 3.2 mm) 2-ounce copper pad connected via ≥2 thermal vias (0.3 mm diameter) to inner-layer ground planes. Avoid solder mask over the pad to maximize heat transfer; maintain ≥0.5 mm clearance to adjacent traces.
Can SMAJ36CA-13-F be used in parallel for higher surge current handling?
No - TVS diodes exhibit parametric mismatch (VBR tolerance ±5%), causing uneven current sharing and potential thermal runaway. For higher IPP, select a single higher-rated device (e.g., SMBJ36CA) or implement active current-balancing circuitry, which is rarely justified for cost-sensitive TVS applications.
SMAJ36CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ36CA-13-F FAQ
1.How can I place an order for SMAJ36CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CA-13-F 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-F reliable?
The price and inventory of SMAJ36CA-13-F 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-F is usually 5 days.
3.What payment methods are accepted for SMAJ36CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CA-13-F?
SMAJ36CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CA-13-F 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-F?
For technical support, including SMAJ36CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CA-13-F requirements.
6.How does Aetrix verify that SMAJ36CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ36CA-13-F 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-F meets industry standards.
7.What is the process for return or replacement of SMAJ36CA-13-F?
All SMAJ36CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CA-13-F, 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-F part is unused and in its original packaging.
Return procedure for SMAJ36CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36CA-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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