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Microchip Technology SMAJ45CE3/TR13
- Part No.:
- SMAJ45CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ45CE3/TR13.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,118
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Product details
Overview
SMAJ45CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for 45 V working peak standoff voltage protection in DC power rails and signal lines. It delivers 500 W peak pulse power at 10/1000 µs, clamps transients to ≤80.3 V at 6.2 A peak pulse current, and operates from –65 °C to +150 °C - used in industrial power supplies, telecom interface protection, and automotive control modules.
For engineers reviewing the SMAJ45CE3/TR13 datasheet, SMAJ45CE3/TR13 pinout, SMAJ45CE3/TR13 application, or SMAJ45CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package compatibility, low standby leakage (<1 µA @ 45 V), and RoHS-compliant matte-tin plating.
Technical Context
This bidirectional TVS uses avalanche breakdown across symmetrical P-N junctions to clamp both positive and negative transients without polarity dependence. Its <100 ps theoretical response time enables effective suppression of ESD events per IEC61000-4-2 Level 4 (±15 kV contact), while the 80.3 V clamping voltage at 6.2 A ensures safe voltage limiting for 48 V nominal systems.
The device meets secondary lightning surge requirements per IEC61000-4-5 with 42 Ω source impedance up to Class 1 (SMAJ45CE3/TR13 supports Class 1 per spec sheet), and its 15 °C/W junction-to-lead thermal resistance enables reliable power dissipation when mounted on FR4 with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit's normal operating range. |
| VBR min | 50.0 V @ 1 mA - Minimum breakdown voltage threshold; guarantees reliable turn-on above system nominal voltage. |
| VC @ IPP | 80.3 V @ 6.2 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream components. |
| PPP | 500 W - Peak pulse power handling capacity; defines survivability under standardized surge waveforms. |
| ID @ VWM | <1 µA - Reverse leakage current at standoff voltage; ensures negligible power loss and no interference in high-impedance circuits. |
| TJ Range | –65 °C to +150 °C - Operating junction temperature range; supports deployment in harsh environments including engine bays and industrial enclosures. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy body meeting UL94V-0; terminals feature C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating solderable per MIL-STD-750 Method 2026; cathode band omitted for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No polarity marking; either terminal serves as input/output for ± surges - simplifies PCB layout and eliminates orientation errors. |
| Case / Body | Thermal conduction path | Direct thermal coupling to PCB copper; 15 °C/W junction-to-lead resistance requires minimum 1 oz Cu pad area per datasheet footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external diode pairing. |
| IEC61000-4-5 Class 1 compliance | Validated for secondary lightning surges with 42 Ω source impedance - critical for industrial Ethernet and RS-485 interfaces. |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with matte-tin plating; eliminates lead-based solder compatibility concerns. |
| DO-214AC mechanical standardization | Ensures drop-in replacement compatibility with existing SMA footprints and automated placement equipment. |
Applications
| Industrial Power Rail Protection | Telecom Interface Surge Suppression |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between rail and ground to clamp both polarity surges before reaching DC-DC converters and microcontrollers. Use Value: Limits rail voltage excursion to ≤80.3 V during 6.2 A surges, preventing latch-up or overvoltage damage to downstream 5 V/3.3 V logic. | Use Scenario: Shielding RS-485 transceivers in base station backhaul links from ESD and induced RF coupling. IC Role / Device Role / Timing Role: Placed differential-line-to-ground to suppress common-mode transients while preserving signal integrity up to 10 Mbps. Use Value: Sub-100 ps response captures fast ESD events (IEC61000-4-2), and 500 W rating handles multi-kV line-to-ground surges without degradation. |
| Automotive Body Control Module (BCM) | Medical Equipment Input Filtering |
Use Scenario: Safeguarding LIN bus nodes and sensor inputs in BCMs exposed to battery transients and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS on each LIN line referenced to chassis ground, absorbing both positive and negative spikes. Use Value: Withstands repeated 10/1000 µs surges up to 500 W and maintains <1 µA leakage at 45 V - avoids false triggers in low-current sensor circuits. | Use Scenario: Protecting analog front-end inputs of patient monitoring devices from ESD during clinical handling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS on isolated sensor inputs to prevent transient-induced offset drift or ADC saturation. Use Value: Clamps ±15 kV contact ESD (IEC61000-4-2) to <80.3 V without adding signal-path capacitance that would degrade bandwidth or SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA | Same electrical specs and DO-214AC package; lacks "e3" RoHS suffix and TR13 tape-and-reel packaging. | No RoHS compliance or standardized reel quantity - unsuitable for lead-free manufacturing or high-volume SMT lines requiring EIA-481-1-A tape. | Select SMAJ45CE3/TR13 when RoHS compliance and 750-unit 7-inch reel logistics are required. |
| SMBJ45CA | Same VWM, VBR, and VC, but SMB package (DO-214AA); 600 W peak power rating and higher thermal resistance (20 °C/W). | Larger footprint and lower power density - better suited for lower-density boards where thermal margin exceeds requirement. | Choose SMBJ45CA only if board space allows larger package and higher surge margin is needed beyond 500 W. |
Compared with SMAJ45CA and SMBJ45CA, SMAJ45CE3/TR13 uniquely combines RoHS compliance, standardized EIA-481-1-A tape-and-reel delivery, and optimal thermal performance in the compact DO-214AC footprint - making it ideal for volume production of industrial and medical electronics.
Availability
SMAJ45CE3/TR13 is available at Aetrix Electronics and suitable for industrial power rail protection, telecom interface surge suppression, and automotive body control module designs requiring stable component supply, full RoHS compliance, and verified IEC61000-4-2/4-4/4-5 performance.
Supply support for SMAJ45CE3/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 ICs, RF solutions, and discrete protection devices for aerospace, defense, and industrial markets.
The SMAJ series was engineered specifically for surface-mount transient voltage suppression in space-constrained, high-surge environments - emphasizing fast response, repeatable clamping, and robust thermal performance in DO-214AC packaging.
FAQ
What does the "C" suffix in SMAJ45CE3/TR13 indicate?
The "C" suffix denotes bidirectional construction, meaning SMAJ45CE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This eliminates the need for dual unidirectional devices in AC-coupled or floating circuits and simplifies layout versus unidirectional variants like SMAJ45AE3/TR13.
Is SMAJ45CE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ45CE3/TR13 is rated for IEC61000-4-5 secondary lightning surge protection with 42 Ω source impedance up to Class 1, as confirmed in Microsemi's MSC0270A datasheet. Its 500 W peak pulse power and 80.3 V clamping voltage ensure reliable operation under standardized 1.2/50 µs open-circuit voltage and 8/20 µs current waveforms.
What is the maximum clamping voltage of SMAJ45CE3/TR13 under surge conditions?
The maximum clamping voltage of SMAJ45CE3/TR13 is 80.3 V at 6.2 A peak pulse current (10/1000 µs waveform), per the official Microsemi MSC0270A datasheet. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does SMAJ45CE3/TR13 require special PCB layout considerations?
Yes - SMAJ45CE3/TR13 requires adherence to Microsemi's recommended DO-214AC pad layout (Page 5 of MSC0270A), including minimum 1 oz copper thermal pads and short, low-inductance traces to ground. Deviations increase clamping voltage and reduce surge survivability due to parasitic inductance and thermal impedance effects.
How does the "e3" suffix affect the plating and solderability of SMAJ45CE3/TR13?
The "e3" suffix indicates RoHS-compliant annealed matte-tin plating per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, with solderability validated at 260 °C for 10 seconds. This ensures compatibility with lead-free reflow profiles and eliminates tin whisker risk compared to traditional SnPb finishes - a requirement for modern electronics manufacturing.
SMAJ45CE3/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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- 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)
SMAJ45CE3/TR13 FAQ
1.How can I place an order for SMAJ45CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ45CE3/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 SMAJ45CE3/TR13 reliable?
The price and inventory of SMAJ45CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ45CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ45CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ45CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ45CE3/TR13?
SMAJ45CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ45CE3/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 SMAJ45CE3/TR13?
For technical support, including SMAJ45CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ45CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ45CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ45CE3/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 SMAJ45CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ45CE3/TR13?
All SMAJ45CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ45CE3/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 SMAJ45CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ45CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ45CE3/TR13 Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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