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Microchip Technology SMAJ43AE3/TR13
- Part No.:
- SMAJ43AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43AE3/TR13.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,858
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Product details
Overview
SMAJ43AE3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for primary overvoltage protection of DC power rails and signal lines. It features a 43 V standoff voltage (VWM), 47.8 V minimum breakdown voltage (VBR), 76.7 V maximum clamping voltage (VC) at 6.5 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 SMAJ43AE3/TR13 datasheet, SMAJ43AE3/TR13 pinout, SMAJ43AE3/TR13 application, or SMAJ43AE3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 secondary lightning surge (42 Ω source), unidirectional polarity marking, RoHS-compliant matte-tin plating, and compatibility with standard DO-214AC footprint for automated SMT assembly.
Technical Context
This TVS operates as a silicon avalanche diode with fast response (<100 ps theoretical turn-on time), optimized for clamping transients before sensitive downstream ICs experience overstress. Its unidirectional construction provides forward conduction capability (40 A peak surge, 3.5 V max forward voltage) while blocking reverse leakage below 1 µA at 43 V.
The device is rated for continuous operation from –65 °C to +150 °C, with thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 board. It meets IEC61000-4-2 (ESD ±30 kV air), IEC61000-4-4 (EFT 4 kV), and IEC61000-4-5 (lightning surge up to Class 4 with 12 Ω source impedance).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before significant leakage; sets operating margin for 36–42 V DC rails. |
| VBR min @ IBR | 47.8 V @ 1 mA - Confirmed avalanche onset threshold; ensures reliable triggering above nominal rail voltage. |
| VC @ IPP | 76.7 V @ 6.5 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on protected load. |
| PPP | 500 W - Peak pulse power handling capacity; supports robust protection against repetitive transients in industrial environments. |
| ID @ VWM | <1 µA - Ultra-low standby leakage; avoids measurable power loss or bias shift in high-impedance circuits. |
| tclamp | <100 ps - Theoretical response time; enables effective suppression of ESD events before IC latch-up occurs. |
| Operating Temp | –65 °C to +150 °C - Full military-grade temperature range; validated for under-hood automotive and outdoor telecom use. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case with C-bend leads, RoHS-compliant annealed matte-tin plating, moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path / clamping node | Connected to ground or low-impedance reference; conducts avalanche current during overvoltage events. |
| Anode | Protected line input | Connected to the line being protected (e.g., +48 V telecom rail); blocks reverse current until VBR exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional avalanche structure | Enables forward conduction for bidirectional surge paths while maintaining precise reverse standoff and clamping behavior. |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with lead-free matte-tin plating and halogen-free epoxy encapsulation. |
| DO-214AC footprint compatibility | Matches JEDEC-standard layout (0.194–0.216″ length, 0.100–0.110″ width); supports reflow soldering without tombstoning. |
| IEC61000-4-5 Class 4 compliance | Validated for secondary lightning surges with 12 Ω source impedance up to 43 V standoff - critical for industrial fieldbus interfaces. |
| Low thermal resistance (15 °C/W) | Enables efficient heat transfer to PCB copper pour, sustaining repeated 500 W pulses without thermal runaway. |
Applications
| Telecom Power Input Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: 48 V DC power entry point in remote radio head (RRH) base stations exposed to induced lightning surges. IC Role / Device Role / Timing Role: Primary clamping element placed between input filter capacitor and DC-DC converter input. Use Value: Limits transient voltage to ≤76.7 V during 42 Ω IEC61000-4-5 Class 1 surge, preventing damage to upstream EMI filters and downstream buck controllers. |
Use Scenario: 24 V digital input channel on programmable logic controller (PLC) module subject to inductive switching noise. IC Role / Device Role / Timing Role: Line-side TVS connected anode-to-signal, cathode-to-ground ahead of optocoupler input stage. Use Value: Clamps 1 kV/500 A transients within <100 ps, preserving signal integrity and avoiding false triggering of isolated inputs. |
| Automotive Body Control Module | Medical Diagnostic Equipment Interface |
Use Scenario: LIN bus line protection in vehicle door module where battery dump and load-switch spikes occur. IC Role / Device Role / Timing Role: Unidirectional TVS placed across LIN line and chassis ground near connector interface. Use Value: Withstands 40 A 8.3 ms half-sine forward surge and clamps reverse transients to ≤76.7 V, meeting ISO 7637-2 Pulse 1/2a requirements. |
Use Scenario: RS-485 communication port on ultrasound imaging system exposed to ESD during cable hot-plug events. IC Role / Device Role / Timing Role: Point-of-entry TVS on differential pair, cathode tied to local ground plane adjacent to transceiver. Use Value: Provides ±30 kV contact ESD immunity per IEC61000-4-2, limiting voltage excursion to <10 V differential during discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ43A | Same VWM, VBR, VC, and package; identical electrical specs but non-RoHS tin-lead plating. | Not suitable for RoHS-restricted medical or consumer products requiring lead-free compliance. | Select SMAJ43AE3/TR13 when full RoHS compliance and matte-tin solderability are mandatory. |
| Vishay SMAJ43A-E3/5AT | Identical VWM/VC ratings and DO-214AC package; minor variation in VBR min (47.5 V vs. 47.8 V) and IPP (6.6 A vs. 6.5 A). | Approved for automotive AEC-Q200 Grade 1; not screened for avionics or MIL-PRF-19500 JANTX. | Choose SMAJ43AE3/TR13 for programs requiring optional MA/MX screening prefixes or Scottsdale Division traceability. |
Compared with Littelfuse SMAJ43A and Vishay SMAJ43A-E3/5AT, SMAJ43AE3/TR13 offers guaranteed RoHS compliance, documented avionics-grade screening options (MA prefix), and direct factory support for MIL-PRF-19500 JANTX variants - making it preferred for defense, aerospace, and regulated industrial deployments.
Availability
SMAJ43AE3/TR13 is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC digital I/O, automotive body control modules, and medical diagnostic equipment interfaces requiring stable component supply and full RoHS compliance.
Supply support for SMAJ43AE3/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 developed specifically for surface-mount transient suppression in harsh-environment electronics, emphasizing robust clamping, fast response, and qualification for extended temperature and surge stress conditions.
FAQ
What is the clamping voltage of SMAJ43AE3/TR13 at its rated peak pulse current?
The SMAJ43AE3/TR13 has a maximum clamping voltage (VC) of 76.7 V at 6.5 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with the device mounted on a FR4 PCB using the recommended footprint per Microsemi's datasheet.
Is SMAJ43AE3/TR13 unidirectional or bidirectional?
SMAJ43AE3/TR13 is a unidirectional transient voltage suppressor, indicated by the "A" suffix in its part number. It features a cathode band for polarity identification and conducts only in the forward direction during surge events, while blocking reverse current up to its 43 V standoff voltage (VWM). Bidirectional versions use "CA" or "C" suffixes.
Does SMAJ43AE3/TR13 meet IEC61000-4-5 for lightning surge protection?
Yes, SMAJ43AE3/TR13 is validated for IEC61000-4-5 secondary lightning surge protection with both 42 Ω and 12 Ω source impedances. At 43 V VWM, it qualifies for Class 4 (12 Ω) and Class 1 (42 Ω) testing, delivering clamping performance within specification limits across all defined test levels per Microsemi's MSC0270A datasheet.
What is the package type and mounting configuration of SMAJ43AE3/TR13?
SMAJ43AE3/TR13 uses the DO-214AC (SMA) surface-mount package with C-bend leads, conforming to JEDEC outline MO-136AA. It is designed for reflow soldering on standard FR4 PCBs with a recommended pad layout (0.194–0.216″ length, 0.100–0.110″ width) and requires no dry pack due to IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Can SMAJ43AE3/TR13 be used in automotive applications?
Yes, SMAJ43AE3/TR13 is qualified for automotive use with an operating temperature range of –65 °C to +150 °C and compliance with ISO 7637-2 Pulse 1/2a for load-dump and inductive switching transients. Its 40 A forward surge rating and 3.5 V max forward voltage support robust protection in body control modules and LIN/CAN interface circuits.
SMAJ43AE3/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):
- 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)
SMAJ43AE3/TR13 FAQ
1.How can I place an order for SMAJ43AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43AE3/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 SMAJ43AE3/TR13 reliable?
The price and inventory of SMAJ43AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ43AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43AE3/TR13?
SMAJ43AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43AE3/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 SMAJ43AE3/TR13?
For technical support, including SMAJ43AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ43AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ43AE3/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 SMAJ43AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ43AE3/TR13?
All SMAJ43AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43AE3/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 SMAJ43AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ43AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43AE3/TR13 Tags
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