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Microchip Technology SMAJ4763AE3/TR13
- Part No.:
- SMAJ4763AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4763AE3/TR13.pdf
- Description:
- DIODE ZENER 91V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,088
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Product details
Overview
SMAJ4763AE3/TR13 from Microsemi (now part of Microchip Technology) is a 2 W surface-mount silicon Zener diode with a nominal zener voltage of 91 V ±5%, 2.8 mA test current, 250 Ω dynamic impedance at IZT, 5 µA maximum reverse leakage at 69.2 V, and 3000 mA peak surge current rating. It serves as a precision voltage regulator or overvoltage clamp in DC power supply feedback loops.
For engineers reviewing the SMAJ4763AE3/TR13 datasheet, SMAJ4763AE3/TR13 pinout, SMAJ4763AE3/TR13 application, or SMAJ4763AE3/TR13 equivalent, key selection criteria include its 91 V regulation tolerance, DO-214AC package thermal resistance (25 °C/W), -55°C to +150°C operating range, and compatibility with UL94V-0 flame-retardant PCB mounting.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and line conditions. Its 250 Ω dynamic impedance at 2.8 mA ensures predictable regulation slope, while the 5 µA reverse leakage at 69.2 V supports low-power standby circuit integrity.
The device is rated for 2.0 W steady-state dissipation on 4.0 mm² copper pads, with linear derating above 100 °C to zero power at 150 °C. Its DO-214AC package enables automated placement and meets MIL-STD-750 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% - precise DC voltage reference point for feedback networks |
| Test Current (IZT) | 2.8 mA - minimum bias current required to achieve specified VZ |
| Dynamic Impedance (ZZT) | 250 Ω @ IZT - defines regulation sensitivity to current variation |
| Reverse Leakage (IR) | 5 µA @ 69.2 V - ensures minimal quiescent power loss in high-impedance circuits |
| Peak Surge Current (IS) | 3000 mA - withstands transient overvoltage events per ½-sine wave pulse |
| Power Dissipation (PAV) | 2.0 W @ TL = 100 °C - requires thermal pad design for sustained operation |
| Operating Temperature | -55°C to +150°C - suitable for automotive under-hood and industrial control environments |
Pinout & Package
DO-214AC (SMAJ) surface-mount package with cathode band marking; two-terminal unidirectional device. Polarity indicated by visible cathode band; anode and cathode terminals are non-reversible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in forward bias; reference ground node in Zener regulation | Connected to system ground or lower-potential rail in shunt regulator configuration |
| Cathode | Current source in reverse breakdown; regulated output node | Connected to feedback point or protected circuit node; voltage clamped to 91 V |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount flat handling surface | Enables accurate pick-and-place placement and consistent reflow alignment |
| JEDEC DO-214AC mechanical compatibility | Matches standard footprint for automated assembly and board-level interchangeability |
| UL94V-0 flame-retardant epoxy encapsulation | Meets safety requirements for enclosed industrial and automotive electronics |
| 260 °C / 10 s soldering tolerance | Supports standard lead-free reflow profiles without parametric shift or delamination |
| Electrically equivalent to 1N4763A | Direct functional replacement for through-hole designs requiring same electrical behavior |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting upper threshold for TL431 or similar shunt regulator IC. Use Value: 91 V breakdown provides margin above 48 V nominal output, enabling stable regulation across line/load transients. | Use Scenario: Clamping induced surges on 48 V DC bus in telecom power distribution units. IC Role / Device Role / Timing Role: Passive shunt protection device diverting excess energy to ground during lightning-induced transients. Use Value: 3000 mA surge rating handles IEC 61000-4-5 Level 4 surge events without degradation. |
| Industrial Sensor Signal Conditioning | Automotive ECU Power Rail Stabilization |
Use Scenario: Providing stable 91 V reference for analog-to-digital conversion of high-voltage sensor outputs. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric scaling of 0–100 V input signals. Use Value: 5% tolerance and 250 Ω ZZT ensure <±0.5 V error in 12-bit measurement systems. | Use Scenario: Stabilizing auxiliary 12 V rail against load dump spikes in engine control modules. IC Role / Device Role / Timing Role: Secondary clamp protecting microcontroller LDO inputs after primary TVS suppression. Use Value: -55°C to +150°C rating ensures reliability in under-hood temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4763A | Through-hole DO-41 package; identical electrical specs (91 V, 2.8 mA, 250 Ω) | Requires PCB redesign for through-hole mounting; no surface-mount compatibility | Select when legacy through-hole assembly or manual prototyping is required |
| MMSZ5265B-TP | 1 W SOD-123 package; 91 V ±5%, but only 200 mA surge rating and 17 Ω ZZT | Lower power handling limits use to low-energy signal rails, not power bus clamping | Select for space-constrained signal-level references where 2 W dissipation is unnecessary |
Compared with 1N4763A and MMSZ5265B-TP, SMAJ4763AE3/TR13 uniquely combines 2 W power handling, DO-214AC surface-mount compatibility, and 3000 mA surge capability-making it optimal for industrial power supply and automotive clamp applications requiring both thermal robustness and automated assembly.
Availability
SMAJ4763AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ4763AE3/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 industrial, automotive, and telecom power systems where thermal stability and surge resilience are critical.
FAQ
What is the zener voltage tolerance for SMAJ4763AE3/TR13?
The SMAJ4763AE3/TR13 has a nominal zener voltage of 91 V with a tolerance of ±5%, as confirmed in the Electrical Characteristics table. This tolerance applies under standard test conditions (25°C, 2.8 mA IZT). The "E3" suffix denotes the 5% tolerance grade per manufacturer documentation.
Is SMAJ4763AE3/TR13 compatible with lead-free reflow soldering?
Yes, SMAJ4763AE3/TR13 supports lead-free reflow with a maximum soldering temperature of 260°C for 10 seconds, per MIL-STD-750 Method 2026. Its DO-214AC package and epoxy meet industry-standard thermal profiles without parametric shift or mechanical damage.
What is the maximum steady-state power dissipation for SMAJ4763AE3/TR13?
The SMAJ4763AE3/TR13 is rated for 2.0 W steady-state power dissipation at a lead temperature of 100°C. Power must be linearly derated above 100°C, reaching zero at 150°C. This assumes mounting on 4.0 mm² copper pads per terminal per datasheet note.
How does the dynamic impedance of SMAJ4763AE3/TR13 affect regulation accuracy?
The SMAJ4763AE3/TR13 exhibits 250 Ω dynamic impedance at 2.8 mA test current. This value determines how much the output voltage shifts with changes in current-lower ZZT yields tighter regulation. At ±10% current variation, expected voltage drift is ±2.5 V, critical for feedback loop stability.
Can SMAJ4763AE3/TR13 replace 1N4763A in existing designs?
Yes, SMAJ4763AE3/TR13 is electrically equivalent to 1N4763A per datasheet note, sharing identical zener voltage, test current, and dynamic impedance. However, its DO-214AC surface-mount package requires PCB layout change versus the DO-41 through-hole footprint of 1N4763A.
SMAJ4763AE3/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:
- ±5%
- 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
SMAJ4763AE3/TR13 FAQ
1.How can I place an order for SMAJ4763AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4763AE3/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 SMAJ4763AE3/TR13 reliable?
The price and inventory of SMAJ4763AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4763AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4763AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4763AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4763AE3/TR13?
SMAJ4763AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4763AE3/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 SMAJ4763AE3/TR13?
For technical support, including SMAJ4763AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4763AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4763AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4763AE3/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 SMAJ4763AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4763AE3/TR13?
All SMAJ4763AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4763AE3/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 SMAJ4763AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4763AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4763AE3/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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MM5Z5V1ST1G
onsemi
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SMAZ12-13-F
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