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Microchip Technology SMAJ4762CE3/TR13
- Part No.:
- SMAJ4762CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4762CE3/TR13.pdf
- Description:
- DIODE ZENER 82V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,442
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Product details
Overview
SMAJ4762CE3/TR13 from Microsemi (now Microchip) is a 2 W surface-mount Zener diode with a nominal zener voltage of 82 V ±2%, 200 Ω dynamic impedance at 3.0 mA test current, and 55 A peak surge current capability; used for precision voltage regulation and overvoltage protection in DC power rails and industrial control interfaces.
For engineers reviewing the SMAJ4762CE3/TR13 datasheet, SMAJ4762CE3/TR13 pinout, SMAJ4762CE3/TR13 application, or SMAJ4762CE3/TR13 equivalent, key selection criteria include ±2% voltage tolerance, DO-214AC package thermal resistance (25°C/W), 150°C maximum junction temperature, and compliance with JEDEC 1N47xxA equivalents for legacy design migration.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and line conditions. It delivers regulated output at 82 V with 200 Ω dynamic impedance measured at 3.0 mA, and supports transient suppression via 55 A peak surge current (½-sine, 1/120 s).
Designed for surface-mount assembly on FR-4 PCBs with 4.0 mm² copper pads per terminal, it features a cathode band polarity indicator, UL94V-0 flame-retardant epoxy body, and soldering compatibility up to 260°C for 10 seconds per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V ±2% - tight tolerance enables accurate voltage clamping in feedback loops and reference circuits |
| Test Current (IZT) | 3.0 mA - defines operating point for specified VZ and ZZT measurements |
| Dynamic Impedance (ZZT) | 200 Ω @ 3.0 mA - low impedance ensures minimal voltage deviation under small-signal load changes |
| Peak Surge Current (IS) | 55 A - withstands short-duration transients per ½-sine waveform (1/120 s) |
| Power Dissipation (PAV) | 2.0 W - rated at 25°C with derating to zero at 150°C using 4.0 mm² copper pads |
| Junction Temperature Range | –55°C to +150°C - supports operation in extended industrial and automotive under-hood environments |
| Thermal Resistance (RθJL) | 25°C/W - defines temperature rise from junction to lead under steady-state conduction |
Pinout & Package
DO-214AC (SMAJ) surface-mount package with molded epoxy body, cathode band marking, and two terminals: anode and cathode. Dimensions conform to JEDEC DO-214AC with modified maximum length (0.115″ / 2.92 mm) exceeding standard JEDEC callout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries forward current during non-regulation states |
| Cathode | Zener breakdown terminal | Marked by band; connected to higher-potential node; establishes regulated voltage drop when reverse biased above 82 V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables precise clamping without post-production trimming in voltage reference and feedback networks |
| 2.0 W steady-state power rating | Supports continuous regulation in 12–48 V industrial power supplies with adequate PCB copper area |
| 55 A peak surge current | Provides robust transient immunity against IEC 61000-4-5 level 3 surges in motor drive and PLC input stages |
| UL94V-0 flame-retardant epoxy | Meets safety requirements for enclosed industrial equipment and Class 2 power-limited circuits |
| JEDEC 1N47xxA electrical equivalence | Allows drop-in replacement for through-hole 1N4762A in legacy designs undergoing SMT conversion |
Applications
| Industrial Power Supply Feedback | DC Bus Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener reference element setting upper threshold for TL431 or optocoupler LED current. Use Value: ±2% VZ tolerance ensures ±1.5% output regulation accuracy across temperature and line variations. | Use Scenario: Protecting IGBT gate drivers and MCU inputs from bus voltage spikes in motor inverters. IC Role / Device Role / Timing Role: Shunt clamp limiting DC link voltage to 85 V during regenerative braking events. Use Value: 55 A surge rating absorbs 100–200 mJ transients without degradation, extending system reliability. |
| Programmable Logic Controller Input Protection | Telecom Line Card Voltage Reference |
Use Scenario: Conditioning 24 V digital input signals exposed to field wiring in factory automation. IC Role / Device Role / Timing Role: Reverse-biased Zener absorbing induced surges before signal conditioning ICs. Use Value: DO-214AC package allows high-density placement near connectors; 150°C rating supports operation in sealed enclosures. | Use Scenario: Providing stable bias for op-amps and ADC references in telecom shelf management units. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-cost bandgap ICs where 82 V rail exists. Use Value: 200 Ω ZZT ensures <10 mV output shift under 1 mA load variation-critical for 12-bit analog measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4762A | Through-hole DO-41 package; same 82 V ±5% rating; 2 W rating; no ±2% C-grade option | Requires PCB redesign for through-hole mounting; lacks tighter tolerance for precision feedback | Select when legacy through-hole assembly is mandatory and ±5% tolerance is acceptable |
| MMSZ4707ET1G | SOD-123 package; 82 V ±5%; 500 mW power rating; 30 A surge rating | Lower power and surge capacity limits use to low-energy signal-level clamping only | Select only for space-constrained signal conditioning where full 2 W dissipation is not required |
Compared with 1N4762A and MMSZ4707ET1G, SMAJ4762CE3/TR13 uniquely combines SMT compatibility, ±2% tolerance, 2 W power handling, and 55 A surge rating-making it optimal for industrial power regulation where precision, robustness, and board-space efficiency are jointly required.
Availability
SMAJ4762CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply feedback, DC bus overvoltage clamp, and programmable logic controller input protection requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ4762CE3/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 SMAJ47xx series was designed for industrial and automotive voltage regulation and transient suppression, targeting applications demanding tighter tolerances and higher surge resilience than standard 1N47xx devices.
FAQ
What is the Zener voltage tolerance of SMAJ4762CE3/TR13?
The SMAJ4762CE3/TR13 has a nominal Zener voltage of 82 V with a ±2% tolerance, indicated by the 'C' suffix in the part number. This tighter tolerance is confirmed in the manufacturer's datasheet MSC0284A and distinguishes it from standard ±5% variants like SMAJ4762A. The ±2% specification ensures predictable clamping behavior in precision feedback and reference circuits where voltage drift must be minimized across temperature and aging.
Is SMAJ4762CE3/TR13 compatible with JEDEC 1N4762A footprints?
No, SMAJ4762CE3/TR13 uses the DO-214AC (SMAJ) surface-mount package, while 1N4762A uses the through-hole DO-41 package. Though electrically equivalent per datasheet note, their mechanical form factors differ significantly-requiring separate land patterns and assembly processes. SMAJ4762CE3/TR13 is intended for SMT lines and offers superior thermal performance due to its lower RθJL (25°C/W vs. ~65°C/W for DO-41).
What is the maximum steady-state power dissipation for SMAJ4762CE3/TR13?
The SMAJ4762CE3/TR13 is rated for 2.0 W steady-state power dissipation at 25°C ambient, measured with 4.0 mm² copper pads per terminal. Power must be linearly derated above 100°C case temperature, reaching zero at 150°C. This rating is validated per Note 3 in the MSC0284A datasheet and reflects real-world PCB thermal management-not theoretical junction limits alone.
Does SMAJ4762CE3/TR13 meet UL94V-0 flammability requirements?
Yes, SMAJ4762CE3/TR13 uses flame-retardant epoxy meeting UL94V-0, as stated in the Mechanical Data section of the MSC0284A datasheet. This certification applies to the molded package body and supports compliance in industrial enclosures, power supplies, and safety-critical systems where material flammability is regulated under IEC 60950-1 or IEC 62368-1.
What is the peak surge current rating for SMAJ4762CE3/TR13?
The SMAJ4762CE3/TR13 has a peak surge current rating of 55 A, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient, per Note 3 in the Electrical Characteristics table. This value is specific to the 82 V variant and exceeds lower-voltage SMAJ47xx parts-enabling reliable protection against IEC 61000-4-5 combination wave surges in industrial environments.
SMAJ4762CE3/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):
- 82 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 62.2 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
SMAJ4762CE3/TR13 FAQ
1.How can I place an order for SMAJ4762CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4762CE3/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 SMAJ4762CE3/TR13 reliable?
The price and inventory of SMAJ4762CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4762CE3/TR13 is usually 5 days.
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SMAJ4762CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4762CE3/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 SMAJ4762CE3/TR13?
For technical support, including SMAJ4762CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4762CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4762CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4762CE3/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 SMAJ4762CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4762CE3/TR13?
All SMAJ4762CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4762CE3/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 SMAJ4762CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4762CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4762CE3/TR13 Tags
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