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Diodes Incorporated SMAJ36A-13
- Part No.:
- SMAJ36A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36A-13.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,677
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Product details
Overview
SMAJ36A-13 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 36V reverse standoff voltage (VRWM), 40.0–44.2V breakdown voltage (VBR) at 1mA, 58.1V maximum clamping voltage (VC) at 6.9A peak pulse current (IPP), and operates from –55°C to +150°C - used in automotive infotainment power input stages.
For engineers reviewing the SMAJ36A-13 datasheet, SMAJ36A-13 pinout, SMAJ36A-13 application, or SMAJ36A-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC rating, 8.3ms surge current capability, unidirectional polarity alignment with DC rail topology, and SMA package thermal performance under sustained transient stress.
Technical Context
This TVS diode uses glass-passivated silicon junction technology to achieve fast response time (<1ps) and low dynamic impedance during ESD or lightning-induced transients. Its unidirectional configuration provides forward conduction path only when anode-to-cathode voltage exceeds VF ≈ 3.5V at 35A, enabling asymmetric clamping suitable for positive-rail protection.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity standards when applied with proper PCB layout. Thermal derating follows JEDEC-defined pulse conditions: 4 pulses/minute max, 8.3ms half-sine waveform, with steady-state power dissipation limited to 1.0W at TL = 75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surge without failure; defines maximum energy absorption per event |
| Reverse Standoff Voltage (VRWM) | 36V - maximum continuous DC voltage before significant leakage; sets minimum system operating margin |
| Breakdown Voltage (VBR) | 40.0–44.2V @ 1mA - onset of avalanche conduction; determines clamping threshold start point |
| Clamping Voltage (VC) | 58.1V @ IPP = 6.9A - maximum voltage seen by protected circuit during rated surge; critical for IC survival |
| Peak Pulse Current (IPP) | 6.9A - peak current handled at VC; correlates directly with IEC 61000-4-5 Level 3 (1kV/2Ω) surge capability |
| Operating Temperature | –55°C to +150°C - supports under-hood automotive and industrial control environments |
| Package | SMA (DO-214AC) - surface-mount footprint with 4.80–5.59mm body length; compatible with standard reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case, UL 94V-0 rated, cathode band marked on body. Weight: 0.064g. Moisture sensitivity level: 1 per J-STD-020C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for unidirectional clamping | Connected to protected line (e.g., +12V rail); conducts to ground when voltage exceeds VRWM + VBR margin |
| Cathode | Clamp output / surge return path | Connected to system ground; carries full IPP during transient; requires low-inductance trace routing |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 400W peak pulse power rating | Supports IEC 61000-4-5 Level 3 (1kV/2Ω) surge immunity without degradation after repeated events |
| Fast response time (<1 ps) | Clamps transients before downstream ICs experience overstress; eliminates need for additional RC filtering |
| RoHS-compliant matte tin finish | Ensures solderability per MIL-STD-202 Method 208 and compatibility with lead-free reflow processes |
| Unidirectional polarity | Prevents reverse-bias leakage in DC-powered systems; avoids unintended conduction during negative excursions |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V battery-supplied BCM exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between fuse and LDO input; absorbs >90% of surge energy before it reaches regulator. Use Value: Limits voltage to ≤58.1V during 6.9A surge, preventing LDO overvoltage shutdown and MCU brownout. |
Use Scenario: 24V digital input channel subjected to field-wiring induced surges and ESD contact discharge. IC Role / Device Role / Timing Role: First-line protection ahead of optocoupler input; shunts transient current to chassis ground. Use Value: Clamps within 1ps to protect optocoupler CTR stability and prevent false triggering of input logic. |
| Telecom PoE+ Data Line Surge Suppression | Medical Patient Monitor Sensor Interface |
Use Scenario: Ethernet data pair carrying 57V PoE+ power, vulnerable to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each conductor referenced to local ground; handles differential and common-mode transients. Use Value: Maintains <100pF junction capacitance at 0V bias to preserve 100BASE-TX signal integrity up to 100MHz. |
Use Scenario: Analog front-end of ECG sensor connected to patient leads, requiring low-leakage, high-isolation protection. IC Role / Device Role / Timing Role: Low-IR (≤5µA @ 36V) clamping diode on signal path to ADC driver; prevents electrode voltage excursion. Use Value: Ensures <5µA reverse leakage at VRWM preserves microvolt-level signal accuracy and avoids baseline drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-13 | Bi-directional version; symmetric clamping for AC or dual-rail systems; same VRWM, VBR, VC, and IPP ratings | Required where signal lines swing both above and below ground (e.g., RS-485, audio lines) | Select if protecting bidirectional signals; avoid for unidirectional DC rails due to unnecessary leakage path |
| SMBJ36A-13 | Same electrical specs but SMB (DO-214AA) package; 5.29–5.59mm body length; 1.0W PM(AV) at TL = 75°C | Higher thermal mass allows longer surge duration handling; preferred for high-ambient industrial enclosures | Choose when board space permits larger footprint and thermal design requires extended pulse endurance |
Compared with SMAJ36CA-13 and SMBJ36A-13, SMAJ36A-13 offers optimal balance of compact SMA footprint, unidirectional rail compatibility, and verified 400W surge capacity - making it ideal for space-constrained automotive and embedded DC power inputs where polarity is fixed.
Availability
SMAJ36A-13 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom power-over-Ethernet interfaces, and medical sensor front-ends requiring stable component supply across multi-year production cycles.
Supply support for SMAJ36A-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on high-reliability protection, power management, and signal integrity products.
SMAJ series TVS diodes are engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and communications systems where ESD, surge, and load-dump immunity are mission-critical.
FAQ
What is the maximum clamping voltage of SMAJ36A-13 at its rated peak pulse current?
The maximum clamping voltage (VC) is 58.1V measured at 6.9A peak pulse current (IPP), per the DS19005 Rev. 12 datasheet. This value is guaranteed under standardized 8.3ms half-sine waveform conditions and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMAJ36A-13 be used in bidirectional signal protection applications?
No - SMAJ36A-13 is unidirectional and lacks symmetrical clamping behavior. For bidirectional protection (e.g., RS-485, USB, audio), use SMAJ36CA-13, which has identical electrical ratings but enables conduction in both polarities due to its bi-directional internal structure.
What is the thermal derating behavior above 25°C ambient temperature?
Derating follows the curve in Figure 1 of DS19005: peak pulse power drops linearly to ~50% at +125°C ambient. Steady-state power is limited to 1.0W at TL = 75°C, with linear reduction to zero at +175°C lead temperature per Figure 6.
Is SMAJ36A-13 compliant with RoHS and lead-free assembly requirements?
Yes - SMAJ36A-13 features matte tin plating and meets RoHS Directive 2011/65/EU (including exemptions for high-temperature solder and glass). It is qualified for lead-free reflow per J-STD-020C and passes MIL-STD-202 Method 208 solderability testing.
SMAJ36A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 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
SMAJ36A-13 FAQ
1.How can I place an order for SMAJ36A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36A-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 SMAJ36A-13 reliable?
The price and inventory of SMAJ36A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36A-13 is usually 5 days.
3.What payment methods are accepted for SMAJ36A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36A-13?
SMAJ36A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36A-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 SMAJ36A-13?
For technical support, including SMAJ36A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36A-13 requirements.
6.How does Aetrix verify that SMAJ36A-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ36A-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 SMAJ36A-13 meets industry standards.
7.What is the process for return or replacement of SMAJ36A-13?
All SMAJ36A-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36A-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 SMAJ36A-13 part is unused and in its original packaging.
Return procedure for SMAJ36A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36A-13 Tags
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Diodes Incorporated
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