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Microchip Technology SMAJ4759AE3/TR13
- Part No.:
- SMAJ4759AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4759AE3/TR13.pdf
- Description:
- DIODE ZENER 62V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,443
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Product details
Overview
SMAJ4759AE3/TR13 from Microsemi (now Microchip) is a 2 W surface-mount silicon Zener diode with a nominal zener voltage of 62 V ±5%, 4.0 mA test current, 125 Ω dynamic impedance at IZT, and 70 mA maximum surge current. It serves as a precision voltage reference and overvoltage clamp in DC power rail protection circuits.
For engineers reviewing the SMAJ4759AE3/TR13 datasheet, SMAJ4759AE3/TR13 pinout, SMAJ4759AE3/TR13 application, or SMAJ4759AE3/TR13 equivalent, key selection criteria include zener tolerance (±5%), thermal resistance (25 °C/W), steady-state power rating (2.0 W), and DO-214AC package compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation under varying load and line conditions. Its 62 V nominal zener voltage is specified at 4.0 mA test current with 125 Ω dynamic impedance, ensuring predictable regulation slope near the knee region.
Designed for transient suppression and voltage reference functions, it supports continuous operation from –55 °C to +150 °C junction temperature and withstands ½-sine surge pulses up to 70 mA per JEDEC-standard test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% - precise clamping threshold for 60–64 V DC rails |
| Test Current (IZT) | 4.0 mA - standardized bias point for voltage and impedance measurement |
| Dynamic Impedance (ZZT) | 125 Ω @ IZT - low AC impedance ensures minimal voltage deviation under small-signal ripple |
| Max Surge Current (IS) | 70 mA - peak pulse handling capability for transient events per 1/120 s sine wave |
| Steady-State Power (PAV) | 2.0 W - sustained dissipation limit on 4.0 mm² copper pads |
| Junction Temp Range | –55 °C to +150 °C - suitable for under-hood automotive and industrial environments |
| Thermal Resistance (RθJL) | 25 °C/W - defines temperature rise above lead temp under full 2 W load |
Pinout & Package
DO-214AC (SMAJ) surface-mount package with cathode band marking; two-terminal device with anode and cathode leads formed in gull-wing configuration for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower-potential rail during reverse-bias regulation |
| Cathode | Zener breakdown terminal / high-side clamp node | Connected to protected voltage rail; polarity marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC DO-214AC footprint | Enables drop-in replacement for legacy 1N47xxA parts and compatibility with standard SMT pick-and-place tooling |
| 2 W steady-state power rating | Supports higher continuous clamping energy than 1 W Zeners without derating at 100 °C lead temp |
| ±5% zener voltage tolerance | Meets general-purpose regulation accuracy requirements without requiring binning or trimming |
| Cathode band polarity marking | Eliminates orientation errors during automated placement and manual inspection |
| UL94V-0 flame-retardant epoxy | Complies with safety standards for enclosed industrial and automotive control modules |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamp | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamps 12 V and 24 V supply rails against load-dump transients in engine management systems. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy to ground. Use Value: Withstands 70 mA surge pulses and maintains 62 V clamping threshold across –40 °C to +125 °C ambient. | Use Scenario: Protects 0–10 V analog input stages from ESD and field-wiring faults in programmable logic controllers. IC Role / Device Role / Timing Role: Standby voltage reference and overvoltage limiter placed before signal conditioning op-amps. Use Value: 125 Ω dynamic impedance ensures stable reference voltage under sensor-induced ripple currents. |
| DC-DC Converter Feedback Reference | Telecom Line Card Overvoltage Suppression |
Use Scenario: Provides stable 62 V reference for isolated flyback converter feedback networks in telecom power supplies. IC Role / Device Role / Timing Role: Precision Zener used in optocoupler-coupled feedback loop to regulate output voltage. Use Value: ±5% tolerance and low 125 Ω ZZT minimize output voltage drift across temperature and aging. | Use Scenario: Suppresses induced surges on -48 V DC distribution lines in central office equipment. IC Role / Device Role / Timing Role: Primary shunt clamp on power entry stage, coordinated with upstream TVS devices. Use Value: 2.0 W power rating and 25 °C/W thermal resistance enable reliable operation without heatsinking in confined chassis space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4759A | Through-hole DO-41 package; identical electrical specs (62 V, ±5%, 2 W) | Requires wave soldering or hand assembly; not compatible with SMT production lines | Select when board-level repair, prototyping, or mixed-technology assembly is required |
| MMSZ4709T1G | SOD-123 package; 62 V ±5%, but only 500 mW power rating and 150 Ω ZZT | Limited to low-power signal-level clamping; unsuitable for rail-level surge suppression | Select only for space-constrained low-energy reference applications where 2 W capability is unnecessary |
Compared with 1N4759A and MMSZ4709T1G, SMAJ4759AE3/TR13 uniquely delivers 2 W SMT-compatible Zener regulation in DO-214AC, bridging the gap between through-hole robustness and modern assembly efficiency while maintaining tight voltage tolerance and proven surge resilience.
Availability
SMAJ4759AE3/TR13 is available at Aetrix Electronics and suitable for automotive power management, industrial analog protection, telecom DC distribution, and embedded DC-DC feedback applications requiring stable component supply and long-term obsolescence mitigation.
Supply support for SMAJ4759AE3/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 (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components.
SMAJ47xxA series belongs to Microsemi's legacy silicon Zener diode product line, engineered for industrial-grade voltage regulation and transient suppression in harsh-environment power systems.
FAQ
What is the zener voltage tolerance for SMAJ4759AE3/TR13?
The SMAJ4759AE3/TR13 has a nominal zener voltage of 62 V with a tolerance of ±5%, as confirmed in the Electrical Characteristics table. This tolerance applies under standard test conditions (25 °C, 4.0 mA IZT) and is consistent across the full operating temperature range. The "E3" suffix denotes the ±5% grade; no suffix indicates ±10%, while "C" and "D" denote ±2% and ±1% respectively.
Is SMAJ4759AE3/TR13 compatible with reflow soldering processes?
Yes, SMAJ4759AE3/TR13 is qualified for standard SMT reflow soldering with a maximum peak temperature of 260 °C for 10 seconds, per MIL-STD-750 Method 2026. Its DO-214AC package and tin-lead or lead-free terminations meet industry-standard thermal profiles, and the device is supplied on tape-and-reel (TR13) for automated placement.
What is the maximum steady-state power dissipation for SMAJ4759AE3/TR13?
The SMAJ4759AE3/TR13 is rated for 2.0 W steady-state power dissipation when mounted on 4.0 mm² copper pads per terminal. Derating is linear above 100 °C lead temperature, reaching zero power at 150 °C. This rating assumes proper PCB thermal design and accounts for the device's 25 °C/W junction-to-lead thermal resistance.
How does the surge current rating of SMAJ4759AE3/TR13 compare to its DC current capability?
SMAJ4759AE3/TR13 supports a maximum surge current (IS) of 70 mA for a 1/120 second (8.33 ms) ½-sine pulse at 25 °C, while its maximum regulator current (IZM) at TL = 100 °C is 28 mA. The surge rating reflects short-duration transient handling, whereas IZM defines continuous DC current under thermal constraints-these values are not interchangeable and must be applied according to their respective test conditions.
Does SMAJ4759AE3/TR13 meet UL flammability requirements?
Yes, SMAJ4759AE3/TR13 uses flame-retardant epoxy conforming to UL94V-0, as stated in the Mechanical Data section. This certification verifies that the encapsulant self-extinguishes within 10 seconds after flame removal and produces no flaming drips, making it suitable for use in enclosed industrial and automotive electronic assemblies where fire safety compliance is mandatory.
SMAJ4759AE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 47.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC
SMAJ4759AE3/TR13 FAQ
1.How can I place an order for SMAJ4759AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4759AE3/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 SMAJ4759AE3/TR13 reliable?
The price and inventory of SMAJ4759AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4759AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4759AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4759AE3/TR13 transactions.
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4.How is shipping managed for SMAJ4759AE3/TR13?
SMAJ4759AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4759AE3/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 SMAJ4759AE3/TR13?
For technical support, including SMAJ4759AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4759AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4759AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4759AE3/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 SMAJ4759AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4759AE3/TR13?
All SMAJ4759AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4759AE3/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 SMAJ4759AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4759AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4759AE3/TR13 Tags
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MMBZ5240B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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