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Microchip Technology SMAJ43CE3/TR13
- Part No.:
- SMAJ43CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43CE3/TR13.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,612
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Product details
Overview
SMAJ43CE3/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 - deployed for IEC61000-4-5 secondary lightning protection in industrial power supplies and telecom interfaces.
For engineers reviewing the SMAJ43CE3/TR13 datasheet, SMAJ43CE3/TR13 pinout, SMAJ43CE3/TR13 application, or SMAJ43CE3/TR13 equivalent, key selection criteria include bidirectional ESD/EFT compliance per IEC61000-4-2/4-4, RoHS-compliant matte-tin plating, tape-and-reel packaging (TR13), and verified clamping performance under 42 Ω source impedance Class 1 lightning surge conditions.
Technical Context
The SMAJ43CE3/TR13 operates as a symmetrical avalanche diode, enabling equal clamping in both polarities without external biasing - critical for AC-coupled signal lines and ungrounded bus protection. Its <100 ps theoretical response time (unidirectional) and <5 ns for bidirectional operation ensures sub-nanosecond suppression of ESD events.
Designed for surface-mount assembly on FR4 PCBs with recommended footprint, it delivers 15 °C/W junction-to-lead thermal resistance and supports steady-state dissipation of 1.56 W at 25 °C ambient - validated under MIL-STD-750 solderability testing and IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates; sets safe margin above nominal 36–42 V DC bus systems. |
| VBR min @ IBR | 47.8 V @ 1 mA - guaranteed avalanche onset threshold; ensures predictable turn-on during transients exceeding system tolerance. |
| VC @ IPP | 76.7 V @ 6.5 A - clamped voltage during 10/1000 µs surge; limits downstream IC stress to <80 V in 48 V industrial control applications. |
| PPP | 500 W - peak pulse power rating at 25 °C; sustains single-event surges up to 6.5 A without degradation when mounted per recommended pad layout. |
| ID @ VWM | 1 µA - leakage current at standoff voltage; negligible loading on high-impedance sensor inputs or precision reference circuits. |
| Operating Temp | −65 °C to +150 °C - qualified for under-hood automotive, outdoor telecom, and industrial motor drive environments. |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with wide leads for thermal conduction and mechanical robustness in reflow assembly. |
Pinout & Package
DO-214AC (SMA) package with symmetrical dual-terminal construction: no polarity marking required for bidirectional operation; terminals are C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically - surge current flows bidirectionally between line and ground or between differential pairs without orientation dependency. |
| Case | Thermal & mechanical interface | Void-free UL94V-0 epoxy body provides insulation and structural integrity; wide lead geometry enables low thermal resistance (15 °C/W) to PCB copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, RS-485 buses, and floating power rails without polarity concerns or external circuitry. |
| IEC61000-4-5 Class 1 compliance | Validated for secondary lightning surges with 42 Ω source impedance up to 43 V VWM, meeting EN 61000-4-5 requirements for industrial equipment. |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU and eliminates lead-based solder compatibility issues in modern assembly lines. |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel per EIA-481-1-A standard - optimized for high-volume SMT placement with consistent feed reliability. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Primary transient shunt across input rail to ground, clamping surges before they reach DC-DC converter ICs and microcontrollers. Use Value: Limits voltage excursion to ≤76.7 V during 6.5 A 10/1000 µs surge, preserving 100 V-rated MOSFETs and 5 V LDOs downstream. | Use Scenario: RS-485 transceiver port on remote I/O module connected to long field wiring in factory automation. IC Role / Device Role / Timing Role: Bidirectional line-to-line and line-to-ground clamp protecting MAX1487-level transceivers from ESD and induced RF. Use Value: Suppresses ±8 kV contact ESD per IEC61000-4-2 while maintaining <1 pF capacitance impact on 10 Mbps data integrity. |
| Automotive Body Control Module | Renewable Energy Inverter Gate Drive |
Use Scenario: LIN bus node in vehicle door module subjected to battery disconnect transients and alternator load dump coupling. IC Role / Device Role / Timing Role: Low-leakage (1 µA) bidirectional clamp on LIN signal line referenced to chassis ground. Use Value: Prevents latch-up in local LIN transceivers during −100 V to +120 V transients while adding no measurable propagation delay. | Use Scenario: Isolated gate driver supply rail (±15 V) feeding IGBTs in solar inverter half-bridge, vulnerable to cross-talk and fast dv/dt coupling. IC Role / Device Role / Timing Role: Rail-to-rail TVS pair (SMAJ43CE3/TR13 used differentially) limiting overvoltage on isolated DC bias paths. Use Value: Clamps common-mode surges to <80 V within 5 ns, preventing false triggering or destruction of SiC gate drivers. |
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 SMAJ43CA | Identical VWM (43 V), VBR (47.8 V), VC (76.7 V), and DO-214AC package; same 500 W rating but non-RoHS tin-lead plating. | Not suitable for lead-free assembly; requires separate Pb-free qualification if used in new designs targeting RoHS compliance. | Select SMAJ43CE3/TR13 when RoHS compliance and matte-tin solderability are mandatory per manufacturing specification. |
| Vishay SMAJ43CAHE3_A/H | Same electrical specs and RoHS "HE3" suffix; differs in moisture sensitivity level (MSL 1 vs. MSL 1 per J-STD-020B) and tape width (8 mm vs. 12 mm). | Requires reel changeover in SMT line due to non-standard 8 mm tape; may incur setup delays in high-mix production. | Prefer SMAJ43CE3/TR13 for seamless integration into existing 12 mm feeder infrastructure and full traceability to Microsemi's Scottsdale Division screening. |
Compared with Littelfuse SMAJ43CA and Vishay SMAJ43CAHE3_A/H, the SMAJ43CE3/TR13 offers guaranteed RoHS compliance with standard 12 mm EIA-481-1-A tape, direct alignment with Microsemi's avionics-grade screening options (MA/MX prefixes), and documented Class 1 IEC61000-4-5 validation at 42 Ω source impedance - simplifying design-in for industrial and transportation OEMs requiring audit-ready component pedigrees.
Availability
SMAJ43CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, automotive body control modules, and renewable energy inverters requiring stable component supply with full RoHS compliance and tape-and-reel logistics support.
Supply support for SMAJ43CE3/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 voltage suppression in harsh-environment electronics, emphasizing robust surge handling, rapid response, and compatibility with automated assembly - targeting applications where failure due to ESD, lightning, or switching transients is unacceptable.
FAQ
What does the "C" and "E3" suffix mean in SMAJ43CE3/TR13?
The "C" denotes bidirectional configuration - enabling symmetrical clamping for AC or floating signal lines. The "E3" indicates RoHS-compliant matte-tin plating per Microsemi's e3 specification, ensuring lead-free solderability and environmental compliance. Both suffixes are integral to the SMAJ43CE3/TR13 identity and cannot be omitted without changing device functionality or regulatory status.
Is SMAJ43CE3/TR13 suitable for IEC61000-4-5 Class 1 lightning protection?
Yes, SMAJ43CE3/TR13 is explicitly validated for IEC61000-4-5 Class 1 secondary lightning protection with 42 Ω source impedance, covering the full 43 V VWM rating per Microsemi's MSC0270A datasheet. Its 76.7 V clamping voltage at 6.5 A ensures downstream components remain within safe operating area during standardized surge waveforms.
What is the thermal resistance and power derating behavior of SMAJ43CE3/TR13?
SMAJ43CE3/TR13 has 15 °C/W junction-to-lead thermal resistance and 80 °C/W junction-to-ambient (on FR4 with 1 oz Cu and recommended footprint). Steady-state power dissipation is 1.56 W at 25 °C ambient and derates linearly to 0 W at 150 °C - confirmed by Microsemi's Figure 3 derating curve in the SMAJ5.0–170CA, e3 datasheet.
Does SMAJ43CE3/TR13 require orientation during PCB placement?
No - SMAJ43CE3/TR13 is a bidirectional TVS diode with symmetrical terminal construction and no polarity marking. It can be placed in either orientation on the PCB without affecting clamping performance, simplifying automated placement and reducing assembly errors in high-density layouts.
What is the moisture sensitivity level (MSL) and reflow profile for SMAJ43CE3/TR13?
SMAJ43CE3/TR13 is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow. Its maximum solder temperature is 260 °C for 10 seconds, compatible with standard lead-free reflow profiles used in industrial electronics manufacturing.
SMAJ43CE3/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:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- 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)
SMAJ43CE3/TR13 FAQ
1.How can I place an order for SMAJ43CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43CE3/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 SMAJ43CE3/TR13 reliable?
The price and inventory of SMAJ43CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ43CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ43CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43CE3/TR13?
SMAJ43CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43CE3/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 SMAJ43CE3/TR13?
For technical support, including SMAJ43CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ43CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ43CE3/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 SMAJ43CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ43CE3/TR13?
All SMAJ43CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43CE3/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 SMAJ43CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ43CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43CE3/TR13 Tags
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