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Microchip Technology SMAJ4763CE3/TR13
- Part No.:
- SMAJ4763CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4763CE3/TR13.pdf
- Description:
- DIODE ZENER 91V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,593
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Product details
Overview
SMAJ4763CE3/TR13 from Microsemi (now Microchip) is a 2 W surface-mount silicon Zener diode with a nominal zener voltage of 91 V ±2%, 250 Ω dynamic impedance at 2.8 mA test current, and 50 mA maximum surge current. It operates from –55°C to +150°C and is used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the SMAJ4763CE3/TR13 datasheet, SMAJ4763CE3/TR13 pinout, SMAJ4763CE3/TR13 application, or SMAJ4763CE3/TR13 equivalent, key selection criteria include its 2% voltage tolerance, DO-214AC (SMAJ) package thermal resistance of 25°C/W, and 2.0 W steady-state power dissipation on 4.0 mm² copper pads.
Technical Context
This Zener diode functions as a two-terminal voltage reference and clamp device, operating in reverse breakdown mode with sharp knee characteristics verified by dual-point Zener impedance measurement per Note 2. Its 2% tolerance grade (denoted by 'C') ensures tighter regulation than standard 5% or 10% variants.
The device meets JEDEC DO-214AC mechanical standards with cathode band polarity marking, supports soldering at 260°C for 10 seconds, and is rated for UL94V-0 flame-retardant epoxy mounting-enabling reliable use in industrial and automotive power supply monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±2% - precise clamping threshold for 72–110 V system protection |
| Test Current (IZT) | 2.8 mA - defined operating point for voltage specification and impedance measurement |
| Dynamic Impedance (ZZT) | 250 Ω @ IZT - low incremental resistance ensures stable regulation under small-signal load variation |
| Max Surge Current (IS) | 50 mA - withstands ½-sine wave transients up to 3000 A·s² energy (per Note 3) |
| Steady-State Power (PAV) | 2.0 W - requires 4.0 mm² copper pad per terminal for thermal management at full rating |
| Operating Temperature | –55°C to +150°C - suitable for under-hood automotive and industrial ambient environments |
| Thermal Resistance (RθJL) | 25°C/W - junction-to-lead thermal path enables predictable derating above 100°C |
Pinout & Package
Package: DO-214AC (SMAJ), surface-mount, flat handling surface, cathode indicated by band. Dimensions per JEDEC MS-013AA (A = 1.98–2.92 mm, G = 4.93–5.48 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to lower-potential side of regulated rail; carries forward current during non-clamping state |
| Cathode | Zener breakdown terminal / high-voltage reference node | Connected to higher-potential side; conducts reverse current when voltage exceeds 91 V ±2% |
Key Features
| Feature | Design Value |
|---|---|
| 2% Zener voltage tolerance | Enables tighter regulation margins in feedback loops and sensing circuits without external trimming |
| DO-214AC surface-mount package | Provides accurate placement via flat bottom surface and compatible with automated reflow assembly |
| 250 Ω dynamic impedance at 2.8 mA | Minimizes output voltage shift under small load changes in reference applications |
| 50 mA peak surge current rating | Supports transient suppression in 12–48 V DC systems with moderate energy surges |
| UL94V-0 flame-retardant compatibility | Meets safety requirements for enclosed industrial power supplies and control modules |
Applications
| Industrial Power Supply Monitoring | Automotive ECU Voltage Clamp |
|---|---|
Use Scenario: Monitoring 96 V battery-derived auxiliary rail in PLC power modules. IC Role / Device Role / Timing Role: Zener clamp protecting ADC input and supervisor IC against overvoltage events. Use Value: 91 V ±2% threshold prevents false triggering while allowing 10% headroom above nominal rail. | Use Scenario: Clamping CAN transceiver VCC rail during load-dump transients in engine control units. IC Role / Device Role / Timing Role: Standalone overvoltage protection element placed directly across 96 V supply input. Use Value: 2.0 W steady-state rating and 50 mA surge capability handle ISO 7637-2 Pulse 5a without degradation. |
| Telecom DC-DC Converter Reference | Renewable Energy Charge Controller |
Use Scenario: Providing stable 91 V reference for isolated flyback feedback optocoupler biasing. IC Role / Device Role / Timing Role: Precision voltage reference for secondary-side regulation loop. Use Value: 250 Ω ZZT ensures minimal error contribution (<0.25%) to overall feedback accuracy. | Use Scenario: Overvoltage protection for 72 V nominal lithium-iron-phosphate battery bank interface. IC Role / Device Role / Timing Role: Primary clamp in series-connected string protection circuit. Use Value: –55°C to +150°C operating range supports outdoor deployment in desert or arctic solar installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4763A | Through-hole DO-41 package; 5% voltage tolerance; same 91 V nominal rating | Requires PCB through-hole layout; less suitable for high-density SMT designs | Select when legacy through-hole assembly or cost-sensitive prototyping is prioritized |
| BZX84-C91 | SOT-23 package; 2% tolerance; 250 mW power rating; lower surge capability | Limited to low-energy clamping; not rated for 2.0 W continuous dissipation | Select only for signal-level voltage referencing where power handling is not required |
Compared with SMAJ4763CE3/TR13, 1N4763A offers identical electrical specs but lacks SMT compatibility and tighter tolerance, while BZX84-C91 provides SMT fit but sacrifices 8× power handling and surge robustness-making SMAJ4763CE3/TR13 optimal for ruggedized 2 W clamp applications.
Availability
SMAJ4763CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply monitoring, automotive ECU voltage clamp, and telecom DC-DC converter reference requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ4763CE3/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 semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components.
The SMAJ47xxA series was designed for surface-mount Zener regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and tight voltage tolerance in compact DO-214AC packaging.
FAQ
What is the Zener voltage tolerance of SMAJ4763CE3/TR13?
The SMAJ4763CE3/TR13 has a Zener voltage tolerance of ±2%, indicated by the 'C' suffix in its part number. This corresponds to a guaranteed 89.18 V to 92.82 V range at 25°C under specified test conditions (2.8 mA IZT). The tolerance is tighter than standard 5% or 10% variants, supporting precision regulation in feedback and protection circuits where voltage margin is critical.
What does the 'E3/TR13' suffix mean in SMAJ4763CE3/TR13?
The 'E3' denotes compliance with JESD204B-compliant tape-and-reel packaging per EIA-481-D standard, and 'TR13' specifies 13-inch reel packaging with 5,000 units per reel. This configuration ensures compatibility with high-speed SMT pick-and-place equipment and supports automated manufacturing workflows without manual handling or repackaging of the SMAJ4763CE3/TR13.
Can SMAJ4763CE3/TR13 replace SMAJ4763A in existing designs?
Yes, SMAJ4763CE3/TR13 can replace SMAJ4763A in most cases, as both share identical DO-214AC package dimensions, 91 V nominal Zener voltage, and 2.0 W power rating. However, SMAJ4763CE3/TR13 adds ±2% tolerance (vs. ±5% for SMAJ4763A) and E3/TR13 tape-and-reel packaging-requiring verification of tolerance impact on system margin and reel-handling compatibility in production.
What is the maximum reverse surge current rating for SMAJ4763CE3/TR13?
The SMAJ4763CE3/TR13 has a maximum reverse surge current (IS) rating of 50 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient (per Note 3). This rating reflects its ability to absorb transient energy without degradation, making it suitable for clamping moderate-energy surges in 72–100 V DC systems.
How is polarity marked on SMAJ4763CE3/TR13?
Polarity on SMAJ4763CE3/TR13 is indicated by a cathode band printed on the body end of the DO-214AC package. The banded end corresponds to the cathode terminal, which must be connected to the higher-potential side of the circuit for proper Zener operation. This marking aligns with JEDEC DO-214AC mechanical standards and is visible under standard optical inspection during SMT placement.
SMAJ4763CE3/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):
- 91 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 250 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 69.2 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
SMAJ4763CE3/TR13 FAQ
1.How can I place an order for SMAJ4763CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4763CE3/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 SMAJ4763CE3/TR13 reliable?
The price and inventory of SMAJ4763CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4763CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4763CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4763CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4763CE3/TR13?
SMAJ4763CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4763CE3/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 SMAJ4763CE3/TR13?
For technical support, including SMAJ4763CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4763CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4763CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4763CE3/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 SMAJ4763CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4763CE3/TR13?
All SMAJ4763CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4763CE3/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 SMAJ4763CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4763CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4763CE3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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