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Microchip Technology SMAJ64E3/TR13
- Part No.:
- SMAJ64E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64E3/TR13.pdf
- Description:
- TVS DIODE 64VWM 114VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
SMAJ64E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) designed for primary and secondary lightning surge protection in DC power rails and signal lines. It features a 64 V standoff voltage (VWM), 71.1 V minimum breakdown voltage (VBR), 114 V maximum clamping voltage (VC) at 4.4 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in telecom power supplies, industrial I/O modules, and automotive body control units.
For engineers reviewing the SMAJ64E3/TR13 datasheet, SMAJ64E3/TR13 pinout, SMAJ64E3/TR13 application, or SMAJ64E3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 (42 Ω source), RoHS-compliant matte-tin plating, DO-214AC package thermal resistance (15 °C/W junction-to-lead), and compatibility with automated SMT reflow per JEDEC J-STD-020B Level 1 moisture sensitivity.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 71.1 V breakdown threshold (IBR = 1 mA). Its <100 ps theoretical response time enables effective suppression of ESD per IEC61000-4-2 and fast transients per IEC61000-4-4.
It delivers 500 W peak pulse power at 25 °C with 0.01% duty cycle, derating to 1.56 W steady-state dissipation at 25 °C ambient on FR4 board. Thermal resistance is specified at 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient under recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 64 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Min) | 71.1 V @ 1 mA - Ensures reliable triggering above system nominal voltage |
| VC @ IPP | 114 V @ 4.4 A - Limits downstream voltage stress during 10/1000 µs surges |
| PPP | 500 W - Withstands high-energy transients common in industrial power inputs |
| ID @ VWM | 4.4 µA - Low leakage preserves efficiency in battery-backed or low-power circuits |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with wide leads for thermal relief |
| Operating Temp | −65 °C to +150 °C - Validated for under-hood automotive and outdoor industrial use |
Pinout & Package
DO-214AC (SMA) package with cathode-indicated band; void-free thermosetting epoxy body (UL94V-0), C-bend tin-lead or RoHS-compliant matte-tin terminals solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground plane to shunt surge current away from protected ICs |
| Cathode | Protected line input | Connected to DC rail or signal line; clamps to anode when overvoltage occurs |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-5 compliance | Validated for secondary lightning protection (Class 1–4) with 12 Ω and 42 Ω source impedances |
| RoHS-compliant plating | e3 suffix denotes annealed matte-tin termination, compatible with lead-free reflow profiles |
| Fast transient response | <100 ps theoretical turn-on ensures suppression before sensitive logic is damaged |
| Thermal robustness | 15 °C/W junction-to-lead resistance supports sustained surge handling without thermal runaway |
| Tape-and-reel packaging | TR13 suffix indicates 2500-unit 13-inch reel per EIA-481-1-A standard for automated placement |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input lines in programmable logic controller backplanes exposed to inductive switching noise and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before reaching isolation amplifiers and microcontrollers. Use Value: 114 V clamping voltage limits stress on 36 V-rated front-end regulators and ensures immunity to IEC61000-4-5 Class 3 (42 Ω) surges. | Use Scenario: Power supply input to BCM ECUs subjected to load dump and jump-start events in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Primary surge clamp on main VBAT rail upstream of DC-DC converters and CAN transceivers. Use Value: 500 W peak power rating withstands 100 ms load dump pulses; −65 °C to +150 °C rating covers under-hood thermal extremes. |
| Telecom Power Supply Input | Industrial Ethernet PHY Interface |
Use Scenario: 48 V DC input stage of PoE-powered network switches encountering AC-line coupled surges and lightning-induced ring waves. IC Role / Device Role / Timing Role: First-stage TVS on bulk input rail, coordinated with MOVs and gas discharge tubes for staged protection. Use Value: 64 V standoff allows margin above 48 V nominal while maintaining low clamping ratio (VC/VBR = 1.60) for minimal voltage overshoot. | Use Scenario: Data line protection for 10/100BASE-TX Ethernet PHYs connected to unshielded outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used here; SMAJ64E3/TR13 serves as unidirectional clamp on PHY power pins (VDDIO). Use Value: 4.4 µA standby leakage avoids degrading PHY bias stability; DO-214AC footprint fits tight PCB spacing near RJ45 magnetics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/5A (Vishay) | Identical VWM, VBR, VC, and PPP; same DO-214AC package; 100% tested per AEC-Q200 Grade 1 | Qualified for automotive electronics; tighter VBR tolerance (±5% vs ±10%) | Select when AEC-Q200 qualification or tighter parametric consistency is required |
| 1.5SMC64A (ON Semiconductor) | Same electrical specs but SMC (DO-214AB) package - 1.5 mm taller, 0.2 mm wider; 15.6 W max TA derating | Higher thermal mass but requires larger PCB footprint; identical IEC61000-4-5 Class 1 capability | Choose if existing layout accommodates SMC or higher steady-state power margin is needed |
Compared with SMAJ64E3/TR13, SMAJ64A-E3/5A offers automotive-grade screening and tighter VBR control, while 1.5SMC64A provides greater thermal mass in a physically larger package - both require validation of mechanical fit and thermal interface in target designs.
Availability
SMAJ64E3/TR13 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and telecom infrastructure requiring stable component supply across extended temperature ranges and high-reliability surge environments.
Supply support for SMAJ64E3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMAJ series was engineered for robust, surface-mount transient suppression in harsh environments - emphasizing fast response, repeatable clamping, and long-term reliability under repetitive surge stress.
FAQ
What is the clamping voltage of SMAJ64E3/TR13 at its rated peak pulse current?
The SMAJ64E3/TR13 has a maximum clamping voltage (VC) of 114 V at 4.4 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi datasheet and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ64E3/TR13 RoHS compliant and what does the 'e3' suffix indicate?
Yes, SMAJ64E3/TR13 is RoHS compliant. The 'e3' suffix explicitly denotes annealed matte-tin plating on the DO-214AC terminals, qualified per JEDEC J-STD-020B Level 1 moisture sensitivity and compatible with lead-free reflow soldering up to 260 °C for 10 seconds. This matches Microsemi's stated RoHS-compliant manufacturing process for the SMAJ-e3 family.
Can SMAJ64E3/TR13 be used for bidirectional transient protection?
No, SMAJ64E3/TR13 is a unidirectional TVS diode, indicated by the absence of 'C' or 'CA' in its part number. Bidirectional variants (e.g., SMAJ64CA-E3/TR13) are separately specified with symmetrical clamping in both polarities. Using SMAJ64E3/TR13 on AC-coupled or floating signal lines without polarity control risks failure during negative transients.
What is the maximum steady-state power dissipation for SMAJ64E3/TR13 on a standard FR4 PCB?
When mounted on an FR4 printed circuit board with 1 oz copper and Microsemi's recommended footprint, SMAJ64E3/TR13 dissipates up to 1.56 W at 25 °C ambient temperature (TA). At lead temperature (TL) of 75 °C, its steady-state rating increases to 5 W - reflecting its 15 °C/W junction-to-lead thermal resistance and suitability for thermally anchored layouts.
Does SMAJ64E3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ64E3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with both 12 Ω and 42 Ω source impedances. It supports Class 1 (up to SMAJ30A/CA) and Class 2 (up to SMAJ16A/CA) under 12 Ω, and Class 1–4 under 42 Ω - confirming its use in telecom, industrial, and automotive systems requiring standardized surge immunity.
SMAJ64E3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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)
SMAJ64E3/TR13 FAQ
1.How can I place an order for SMAJ64E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64E3/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 SMAJ64E3/TR13 reliable?
The price and inventory of SMAJ64E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ64E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ64E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64E3/TR13?
SMAJ64E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64E3/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 SMAJ64E3/TR13?
For technical support, including SMAJ64E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64E3/TR13 requirements.
6.How does Aetrix verify that SMAJ64E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ64E3/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 SMAJ64E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ64E3/TR13?
All SMAJ64E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64E3/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 SMAJ64E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ64E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ64E3/TR13 Tags
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