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Microchip Technology SMAJ43CAE3/TR13
- Part No.:
- SMAJ43CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43CAE3/TR13.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,437
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Product details
Overview
SMAJ43CAE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 43 V standoff voltage (VWM), 47.8 V minimum breakdown voltage (VBR), and 76.7 V maximum clamping voltage (VC) at 6.5 A peak pulse current - used for ESD/EFT protection in industrial I/O interfaces and telecom line cards.
For engineers reviewing the SMAJ43CAE3/TR13 datasheet, SMAJ43CAE3/TR13 pinout, SMAJ43CAE3/TR13 application, or SMAJ43CAE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR13) for automated assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering sub-5 ns response time to clamp transients before sensitive downstream circuitry is damaged. Its 43 V working voltage aligns with 36–48 V DC power rails common in PoE-powered equipment and industrial control systems.
The device meets IEC61000-4-5 secondary lightning surge immunity up to Class 4 (42 Ω source impedance) and supports 100% temperature cycling screening (−55 °C to +125 °C) when ordered with MA prefix - though SMAJ43CAE3/TR13 itself is standard commercial-grade with moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 43 V - blocks normal operating voltage while remaining non-conductive on 36–48 V DC bus lines |
| VBR (Min) | 47.8 V @ 1 mA - ensures reliable turn-on above system max operating voltage |
| VC @ IPP | 76.7 V @ 6.5 A - limits voltage seen by protected ICs during 10/1000 µs surge |
| PPP | 500 W - handles high-energy transients without failure under defined waveform |
| IPP | 6.5 A - peak surge current capacity at specified clamping voltage |
| ID @ VWM | 1 µA - ultra-low leakage preserves signal integrity and power efficiency |
| Package | DO-214AC (SMA) - industry-standard surface-mount footprint compatible with JEDEC MS-013 |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy body (UL94V-0), C-bend leads with RoHS-compliant matte-tin plating, cathode band omitted per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No polarity marking; either terminal serves as anode or cathode depending on transient polarity |
| Case (body) | Thermal conduction path | Low thermal resistance (15 °C/W junction-to-lead) enables efficient heat dissipation into PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| IEC61000-4-2/4-4/4-5 compliance | Validated for ±8 kV contact / ±15 kV air ESD, 4 kV EFT, and 1 kV/2 kV lightning-induced surges |
| RoHS-compliant "e3" finish | Matte-tin plating meets lead-free soldering requirements and eliminates tin whisker risk |
| Tape-and-reel (TR13) | 2500 units per 13-inch reel - optimized for high-volume SMT placement with EIA-481-1-A standard alignment |
Applications
| Industrial PLC Analog Input Modules | Telecom Line Interface Cards (LIC) |
|---|---|
Use Scenario: Protecting 4–20 mA current loop inputs from induced surges on long field wiring in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to shunt transients before precision op-amps and ADCs. Use Value: Clamps 43 V standby rail to ≤76.7 V during 6.5 A surge, preserving 16-bit measurement accuracy and preventing latch-up. | Use Scenario: Safeguarding T1/E1 interface transformers and line drivers against lightning-induced surges in central office equipment. IC Role / Device Role / Timing Role: Primary-level TVS mounted directly at connector entry point to divert energy before isolation barrier. Use Value: Meets IEC61000-4-5 Class 4 (1 kV, 42 Ω source) with <5 ns response, maintaining signal integrity on 1.544/2.048 Mbps data paths. |
| DC Power Input Protection (PoE PSE) | Automotive Body Control Module (BCM) Sensors |
Use Scenario: Guarding 48 V DC input of IEEE 802.3at PoE+ powered devices against load dump and hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of DC-DC converters and PMICs to prevent overvoltage damage. Use Value: 500 W peak power rating absorbs 10/1000 µs surges up to 6.5 A without degradation, ensuring >100,000 surge cycles. | Use Scenario: Shielding LIN bus sensors (e.g., door lock actuators) from battery transients and ISO 7637-2 pulse 1/2a/3a events. IC Role / Device Role / Timing Role: Bidirectional suppression across sensor supply and return lines to handle reverse-polarity and load dump spikes. Use Value: 43 V VWM matches typical 36 V automotive nominal systems; 1 µA leakage avoids battery drain in always-on modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | 600 W rating, SMB package (larger footprint, higher thermal mass) | Better suited for higher surge duty cycles or elevated ambient temperatures | Select when board space allows larger package and thermal performance exceeds 500 W requirement |
| SMCJ43CA | 1500 W rating, SMC package (3× larger than SMA, lower RθJA) | Required for IEC61000-4-5 Class 5 or repeated high-energy surges | Choose for mission-critical infrastructure where single-event robustness is prioritized over size |
Compared with SMAJ43CAE3/TR13, SMBJ43CA offers higher power handling in a slightly larger footprint, while SMCJ43CA delivers triple the surge capacity but requires significantly more PCB area - making SMAJ43CAE3/TR13 optimal for space-constrained 43 V rail protection where 500 W suffices.
Availability
SMAJ43CAE3/TR13 is available at Aetrix Electronics and suitable for industrial I/O protection, telecom line card design, and PoE-powered equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ43CAE3/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 designed specifically for surface-mount transient suppression in space- and cost-sensitive applications, balancing robust 500 W surge capability with compact DO-214AC packaging.
FAQ
What does the "CA" suffix mean in SMAJ43CAE3/TR13?
The "CA" suffix in SMAJ43CAE3/TR13 indicates a bidirectional configuration - meaning the device clamps transients of either polarity symmetrically across its terminals, unlike unidirectional variants (e.g., SMAJ43A) that require correct orientation. This eliminates polarity concerns in AC-coupled or floating circuits and simplifies layout for differential or transformer-isolated interfaces.
Is SMAJ43CAE3/TR13 RoHS compliant and lead-free?
Yes, SMAJ43CAE3/TR13 is RoHS compliant, as confirmed by the "e3" suffix in its part number - denoting annealed matte-tin plating per J-STD-020B Level 1 moisture sensitivity, with no dry pack required. It supports lead-free reflow profiles up to 260 °C for 10 seconds and meets UL94V-0 flammability standards.
What is the clamping voltage of SMAJ43CAE3/TR13 at its rated peak pulse current?
The maximum clamping voltage (VC) of SMAJ43CAE3/TR13 is 76.7 V at 6.5 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value ensures downstream components see less than 77 V during surge events, critical for protecting 48 V-rated ICs and MOSFETs without overvoltage stress.
Can SMAJ43CAE3/TR13 be used for IEC61000-4-5 lightning surge protection?
Yes, SMAJ43CAE3/TR13 is validated for IEC61000-4-5 secondary lightning surge immunity up to Class 4 (1 kV, 42 Ω source impedance) and Class 2 (1 kV, 12 Ω source impedance). Its 500 W rating and sub-5 ns response enable effective energy diversion before damage occurs in telecom, industrial, and building automation systems.
What is the thermal resistance of SMAJ43CAE3/TR13 when mounted on a standard FR4 PCB?
When mounted on a standard FR4 PCB with 1 oz copper and the recommended footprint, SMAJ43CAE3/TR13 has a thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient. This allows safe operation at 5 W steady-state power dissipation at 75 °C lead temperature, supporting continuous protection in thermally demanding environments.
SMAJ43CAE3/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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 7.2A
- 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)
SMAJ43CAE3/TR13 FAQ
1.How can I place an order for SMAJ43CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43CAE3/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 SMAJ43CAE3/TR13 reliable?
The price and inventory of SMAJ43CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ43CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43CAE3/TR13?
SMAJ43CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43CAE3/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 SMAJ43CAE3/TR13?
For technical support, including SMAJ43CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ43CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ43CAE3/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 SMAJ43CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ43CAE3/TR13?
All SMAJ43CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43CAE3/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 SMAJ43CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ43CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43CAE3/TR13 Tags
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