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Microchip Technology SMAJ36CE3/TR13
- Part No.:
- SMAJ36CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CE3/TR13.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ36CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary and secondary lightning surge protection, ESD/EFT immunity per IEC61000-4-2/4-4, and inductive switching transient clamping in DC power rails and signal lines. It features a 36 V reverse standoff voltage (VWM), 40.0 V minimum breakdown voltage (VBR), 64.3 V maximum clamping voltage (VC) at 9.8 A peak pulse current (IPP), and 500 W peak pulse power rating at 10/1000 µs waveform.
For engineers reviewing the SMAJ36CE3/TR13 datasheet, SMAJ36CE3/TR13 pinout, SMAJ36CE3/TR13 application, or SMAJ36CE3/TR13 equivalent, this device serves as a RoHS-compliant, tape-and-reel packaged (750/reel) TVS for industrial power supplies, automotive body electronics, telecom interface protection, and embedded system I/O hardening where fast response (<5 ns), low standby leakage (<1 µA), and DO-214AC-compatible footprint are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling clamping of positive and negative transients without polarity dependency-ideal for AC-coupled lines or ungrounded differential interfaces. Its silicon avalanche structure delivers sub-nanosecond response to ESD events and robust 500 W surge handling at 10/1000 µs, validated per IEC61000-4-5 with 42 Ω source impedance up to Class 1 (SMAJ36CE3/TR13 supports Class 1 per specification).
The device uses a void-free thermosetting epoxy case (UL94V-0), C-bend leads with annealed matte-tin plating, and is rated for -65°C to +150°C operation. Thermal resistance is 15°C/W junction-to-lead and 80°C/W junction-to-ambient on FR4 with recommended pad layout-critical for sustained surge duty in compact PCB designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 48 V systems. |
| VBR min @ IBR | 40.0 V @ 1 mA - Minimum avalanche onset threshold; ensures reliable triggering above normal operating voltage. |
| VC @ IPP | 64.3 V @ 9.8 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected ICs. |
| PPP | 500 W - Peak pulse power dissipation capability; enables protection against high-energy transients like lightning-induced surges. |
| IPP | 9.8 A - Peak pulse current at VC; determines minimum series impedance needed to limit surge energy into downstream circuitry. |
| ID @ VWM | <1 µA - Reverse leakage current at 36 V; negligible loading on 36 V supply rails or high-impedance sensor inputs. |
| tclamp | <5 ns - Bidirectional clamping response time; sufficient for ESD (IEC61000-4-2) and EFT (IEC61000-4-4) compliance. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bidirectional configuration with no polarity marking (no cathode band). Dimensions: 4.50 mm × 2.79 mm × 2.26 mm (L × W × H); weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required per J-STD-020B).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity-no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating power domains without polarity constraints. |
| 500 W peak pulse power | Supports IEC61000-4-5 Class 1 secondary lightning protection (42 Ω source) and high-energy inductive switch-off transients in motor drives. |
| RoHS-compliant "e3" finish | Matte-tin plating meets lead-free soldering requirements (260°C/10 s) and eliminates Pb-based contamination risk in medical/industrial assemblies. |
| DO-214AC footprint compatibility | Direct drop-in replacement for legacy SMAJ/SMBJ/SMDJ families; leverages existing PCB land patterns and assembly processes. |
| Low thermal resistance (15°C/W) | Efficient heat transfer to PCB copper allows sustained surge duty without thermal runaway in compact layouts with minimal copper area. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
Use Scenario: 24–48 V DC input stage exposed to load dump, jump-start, and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge clamp limiting voltage to ≤64.3 V during 10/1000 µs transients, protecting upstream DC-DC controllers and downstream LDOs. Use Value: Prevents latch-up or gate oxide damage in MOSFET drivers and microcontrollers by holding rail voltage within safe operating area during 500 W surges. |
Use Scenario: LIN bus or sensor analog inputs (e.g., temperature, pressure) subject to ESD and battery reversal transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector entry point to shunt ±15 kV ESD (IEC61000-4-2) and ±100 V load dump spikes. Use Value: Eliminates need for separate positive/negative TVS devices-reduces BOM count and PCB area while maintaining <1 µA leakage at 12 V nominal. |
| Telecom Ethernet PHY Interface | Medical Equipment Signal Conditioning Inputs |
Use Scenario: RJ-45 magnetics secondary side protecting 10/100BASE-TX PHY pins from induced surges and EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF typical) bidirectional TVS placed between differential pairs and ground to clamp common-mode transients without distorting signal integrity. Use Value: Maintains Ethernet signal rise/fall times and jitter performance while meeting IEC61000-4-5 Class 2 (42 Ω) immunity requirements. |
Use Scenario: Isolated analog front-end inputs (e.g., ECG, EEG) requiring ultra-low leakage and biocompatible RoHS compliance. IC Role / Device Role / Timing Role: First-line transient suppressor on patient-connected signal paths, limiting voltage to <65 V during defibrillation surge testing per IEC60601-1 3rd Ed. Use Value: Ensures patient safety by preventing hazardous voltages from reaching isolation barriers, with verified <1 µA leakage at 36 V standoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA/TR7 | Same electrical specs (VWM=36 V, VC=64.3 V), identical DO-214AC package, but non-RoHS (SnPb plating) and supplied in 7-inch reel (750 pcs) vs. TR13's 13-inch reel (2500 pcs). | Preferred for legacy aerospace or avionics programs requiring SnPb soldering or MIL-PRF-19500 screening (add MX prefix); not suitable for RoHS-mandated medical/industrial production. | Select SMAJ36CA/TR7 only if SnPb assembly process or JANTX-grade screening is required; otherwise SMAJ36CE3/TR13 offers full RoHS compliance and higher reel quantity. |
| SMBJ36CA-E3/52 | Higher 600 W peak power rating, same VWM/VC, but larger DO-214AA (SMB) package (5.29 mm × 3.30 mm)-not footprint-compatible with SMAJ36CE3/TR13. | Used where higher surge margin is needed (e.g., outdoor telecom cabinets), but requires PCB redesign due to 30% larger footprint and different thermal mass. | Choose SMBJ36CA-E3/52 only when 600 W rating is mandatory and board space permits larger SMB package; SMAJ36CE3/TR13 remains optimal for space-constrained 500 W applications. |
Compared with SMAJ36CA/TR7 and SMBJ36CA-E3/52, SMAJ36CE3/TR13 uniquely balances RoHS compliance, DO-214AC footprint compatibility, 500 W surge capability, and high-volume tape-and-reel packaging-making it the preferred choice for cost-sensitive, high-reliability industrial and automotive PCBs requiring no layout changes.
Availability
SMAJ36CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom interface protection, and medical signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SMAJ36CE3/TR13 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was engineered for surface-mount transient suppression in space-constrained, high-surge environments-delivering 500 W clamping performance in the industry-standard DO-214AC package with guaranteed IEC61000-4-2/4-4/4-5 compliance.
FAQ
What does the "E3" suffix indicate in SMAJ36CE3/TR13?
The "E3" suffix in SMAJ36CE3/TR13 denotes RoHS-compliant matte-tin plating on the leads, certified to meet EU Directive 2011/65/EU. This finish supports lead-free reflow soldering up to 260°C for 10 seconds and eliminates lead content in the terminal metallization-critical for medical, consumer, and industrial products sold in regulated markets.
Is SMAJ36CE3/TR13 unidirectional or bidirectional?
SMAJ36CE3/TR13 is a bidirectional TVS diode, indicated by the "C" in its part number. It clamps transients of either polarity symmetrically, with identical VBR, VC, and IPP specifications for both positive and negative voltage excursions-making it ideal for AC lines, differential data interfaces, and floating power domains.
What is the clamping voltage of SMAJ36CE3/TR13 at its rated peak pulse current?
The maximum clamping voltage (VC) of SMAJ36CE3/TR13 is 64.3 V at a peak pulse current (IPP) of 9.8 A under the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event.
Does SMAJ36CE3/TR13 require special PCB layout considerations?
Yes-SMAJ36CE3/TR13 requires adherence to Microsemi's recommended DO-214AC pad layout (Page 5 of MSC0270A) to achieve specified thermal resistance (15°C/W junction-to-lead). Short, wide traces to ground planes and adequate copper pour beneath the device are essential to sustain 500 W surge dissipation without exceeding 150°C junction temperature.
How does SMAJ36CE3/TR13 comply with IEC61000-4-5 for lightning surge protection?
SMAJ36CE3/TR13 meets IEC61000-4-5 Class 1 secondary lightning immunity (42 Ω source impedance) per Microsemi's published test data. Its 500 W rating, 64.3 V clamping voltage, and <5 ns response enable it to limit induced surges to safe levels for downstream ICs when used with appropriate series impedance (e.g., 10 Ω resistor or ferrite bead) on protected lines.
SMAJ36CE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- 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:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 9.8A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ36CE3/TR13 FAQ
1.How can I place an order for SMAJ36CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CE3/TR13 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 SMAJ36CE3/TR13 reliable?
The price and inventory of SMAJ36CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ36CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CE3/TR13?
SMAJ36CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CE3/TR13 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 SMAJ36CE3/TR13?
For technical support, including SMAJ36CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ36CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ36CE3/TR13 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 SMAJ36CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ36CE3/TR13?
All SMAJ36CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CE3/TR13, 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 SMAJ36CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ36CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36CE3/TR13 Tags
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Diodes Incorporated
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Diodes Incorporated
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