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Microchip Technology SMAJ4761AE3/TR13
- Part No.:
- SMAJ4761AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4761AE3/TR13.pdf
- Description:
- DIODE ZENER 75V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,592
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Product details
Overview
SMAJ4761AE3/TR13 from Microsemi (now Microchip Technology) is a 2 W, 75 V ±5% Zener diode in DO-214AC (SMA) package, rated for 60 mA maximum regulator current at 100°C lead temperature and 2000 mA peak surge current, used for voltage regulation and overvoltage protection in DC power rails and transient suppression circuits.
For engineers reviewing the SMAJ4761AE3/TR13 datasheet, SMAJ4761AE3/TR13 pinout, SMAJ4761AE3/TR13 application, or SMAJ4761AE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (25°C/W), cathode-band polarity marking, JEDEC-compliant DO-214AC surface-mount footprint, and 100°C derated power dissipation.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and line conditions. Its 75 V nominal zener voltage is specified at 3.3 mA test current with 175 Ω dynamic impedance at that point, and it exhibits 0.25 mA maximum reverse leakage at 56.0 V test voltage.
The device supports high-energy transient suppression via 2000 mA peak surge current rating (½-sine wave, 1/120 s), and its thermal design relies on 4.0 mm² copper pads per terminal to achieve 25°C/W junction-to-lead thermal resistance, enabling reliable operation from –55°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at IZT = 3.3 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation (PAV) | 2.0 W at TL ≤ 100°C - requires thermal pad layout per datasheet to sustain full rating |
| Dynamic Impedance (ZZT) | 175 Ω @ 3.3 mA - indicates voltage regulation stability under small-signal AC variation |
| Peak Surge Current (IS) | 2000 mA (½-sine, 1/120 s) - enables robust ESD/EMP transient absorption without failure |
| Reverse Leakage (IR) | 0.25 µA @ 56.0 V - ensures minimal standby power loss in high-impedance bias networks |
| Junction Temperature Range | –55°C to +150°C - supports automotive under-hood and industrial control environments |
| Package | DO-214AC (SMA) - surface-mount outline with flat handling surface and cathode band polarity mark |
Pinout & Package
DO-214AC (SMA) package: molded plastic body with two coplanar terminals; cathode identified by a single axial band; designed for reflow soldering at ≤260°C for 10 seconds; compliant with UL94V-0 flame retardancy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower-potential rail during Zener operation |
| Cathode | Reverse-biased breakdown terminal / regulated output node | Marked with band; connects to protected node requiring 75 V clamping |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-compliant DO-214AC footprint | Enables drop-in replacement for 1N4761A and compatibility with standard SMA pick-and-place tooling |
| 2000 mA peak surge rating | Withstands IEC 61000-4-5 Level 4 surges without degradation when properly mounted |
| 25°C/W junction-to-lead thermal resistance | Allows 2 W operation with ≤25°C temperature rise above lead temperature when using 4 mm² copper pads |
| ±5% zener voltage tolerance | Meets general-purpose regulation accuracy requirements without need for binning or trimming |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Clamping |
|---|---|
Use Scenario: Stabilizing reference voltage in isolated DC-DC feedback loops of 24 V industrial SMPS. IC Role / Device Role / Timing Role: Zener reference diode providing precision 75 V clamp for optocoupler bias network. Use Value: Maintains loop stability across –40°C to +85°C ambient with <1% drift due to tight 5% VZ tolerance and low ZZT. | Use Scenario: Protecting microcontroller I/O pins from load-dump transients in 12 V vehicle battery systems. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping induced spikes to ≤75 V before reaching sensitive logic inputs. Use Value: Survives 2000 mA surge pulses per ISO 7637-2 Pulse 5a without parametric shift, verified per MIL-STD-750 solderability. |
| Telecom Line Card Protection | Test Equipment Reference Source |
Use Scenario: Safeguarding Ethernet PHY interfaces against lightning-induced surges on PoE-powered line cards. IC Role / Device Role / Timing Role: Primary shunt protector on 48 V DC input rail, coordinated with upstream TVS arrays. Use Value: Delivers predictable 75 V clamping voltage with 175 Ω ZZT, minimizing let-through energy to downstream DC-DC converters. | Use Scenario: Generating stable 75 V reference for calibration circuits in portable multimeters and signal generators. IC Role / Device Role / Timing Role: Precision voltage reference element operating at 3.3 mA IZT in constant-current bias configuration. Use Value: Achieves <0.5% long-term stability due to low knee impedance (ZZK = 750 Ω @ 0.25 mA) and hermetic-equivalent packaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4761A | Same 75 V ±5%, 2 W rating, but in DO-41 through-hole package | Requires PCB through-hole mounting and wave soldering; not suitable for SMT-only lines | Select when legacy through-hole assembly or higher mechanical robustness under vibration is required |
| MMSZ4715T1G | 75 V ±5%, 500 mW rating in SOD-123; 10× smaller footprint, lower surge capability (500 mA) | Not suitable for 2 W continuous or 2000 mA surge duty; limited thermal mass | Select only for space-constrained low-power bias references where surge immunity is secondary |
Compared with 1N4761A and MMSZ4715T1G, SMAJ4761AE3/TR13 uniquely delivers surface-mount 2 W power handling with 2000 mA surge capacity in a JEDEC-standardized SMA outline-making it the only option among the three for high-reliability SMT power rail clamping.
Availability
SMAJ4761AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom line cards, and test equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for SMAJ4761AE3/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, mixed-signal, and radiation-hardened components.
The SMAJ47xxA series was engineered for ruggedized surface-mount voltage regulation and transient suppression in harsh-environment electronics, emphasizing thermal robustness, surge survivability, and JEDEC interoperability.
FAQ
What is the zener voltage tolerance of SMAJ4761AE3/TR13?
The SMAJ4761AE3/TR13 has a nominal zener voltage of 75 V with a tolerance of ±5%, as confirmed in the Electrical Characteristics table. This tolerance applies at the specified test current of 3.3 mA and is measured at thermal equilibrium. No suffix denotes the ±5% grade; tighter tolerances (e.g., 2% or 1%) would be indicated by 'C' or 'D' suffixes, which SMAJ4761AE3/TR13 does not carry.
Can SMAJ4761AE3/TR13 replace 1N4761A in existing designs?
SMAJ4761AE3/TR13 provides identical electrical specifications (75 V ±5%, 2 W, same Zener characteristics) as 1N4761A but in a DO-214AC surface-mount package instead of DO-41 through-hole. Direct replacement requires PCB redesign to accommodate the SMA footprint and reflow process. The SMAJ4761AE3/TR13 cannot be used as a drop-in substitute without layout changes, though it serves the same functional role in voltage regulation and clamping circuits.
What is the maximum steady-state power dissipation for SMAJ4761AE3/TR13?
The SMAJ4761AE3/TR13 has a steady-state power dissipation rating of 2.0 W, valid only when the lead temperature (TL) is held at or below 100°C. Above 100°C, power must be linearly derated to zero at 150°C. This rating assumes mounting on 4.0 mm² copper pads per terminal, as defined in Note 2 of the Maximum Ratings table in the original MSC0284A datasheet.
Does SMAJ4761AE3/TR13 meet UL94V-0 flammability requirements?
Yes, SMAJ4761AE3/TR13 uses flame-retardant epoxy encapsulation meeting UL94V-0, as explicitly stated in the Mechanical Data section. This qualification supports use in safety-critical applications including industrial controls and telecom infrastructure where material flammability compliance is mandated.
What is the peak surge current rating for SMAJ4761AE3/TR13?
The SMAJ4761AE3/TR13 is rated for a peak surge current (IS) of 2000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient, as documented in Table 1 of the datasheet. This rating reflects its capability to absorb high-energy transients such as those defined in IEC 61000-4-5 without parametric shift or failure.
SMAJ4761AE3/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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 175 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 56 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
SMAJ4761AE3/TR13 FAQ
1.How can I place an order for SMAJ4761AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4761AE3/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 SMAJ4761AE3/TR13 reliable?
The price and inventory of SMAJ4761AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4761AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4761AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4761AE3/TR13 transactions.
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4.How is shipping managed for SMAJ4761AE3/TR13?
SMAJ4761AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4761AE3/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 SMAJ4761AE3/TR13?
For technical support, including SMAJ4761AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4761AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4761AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4761AE3/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 SMAJ4761AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4761AE3/TR13?
All SMAJ4761AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4761AE3/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 SMAJ4761AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4761AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4761AE3/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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