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Microchip Technology SMAJ4764CE3/TR13
- Part No.:
- SMAJ4764CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4764CE3/TR13.pdf
- Description:
- DIODE ZENER 100V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,556
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Product details
Overview
SMAJ4764CE3/TR13 from Microsemi (now Microchip) is a 100 V, 2 W surface-mount Zener diode in DO-214AC (SMA) package, rated for 45 A peak surge current at 25°C, with 2.5 mA test current, 350 Ω dynamic impedance at IZT, and 5 µA reverse leakage at 76 V, used for overvoltage protection in DC power rails and voltage reference circuits.
For engineers reviewing the SMAJ4764CE3/TR13 datasheet, SMAJ4764CE3/TR13 pinout, SMAJ4764CE3/TR13 application, or SMAJ4764CE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±2% due to 'C' suffix), thermal resistance (25°C/W), steady-state power dissipation (2.0 W on 4 mm² copper pads), and JEDEC DO-214AC mechanical compatibility.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp transient overvoltages and stabilize reference voltages. Its 100 V nominal zener voltage is specified at 2.5 mA test current (IZT) with ±2% tolerance, and it maintains regulation down to 0.25 mA knee current (IZK) where dynamic impedance rises to 3000 Ω.
The device supports high-energy transients via 45 A peak surge current (IS) under 1/120 s half-sine waveform, and exhibits 5 µA maximum reverse leakage (IR) at 76 V (90% of VZ). Thermal performance is defined by 25°C/W junction-to-lead resistance when mounted on 4.0 mm² copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V ±2% at 2.5 mA - precise clamping threshold for 12 V–48 V system protection stages |
| Power Dissipation (PAV) | 2.0 W on 4.0 mm² copper pads - defines PCB copper area requirement for thermal management |
| Peak Surge Current (IS) | 45 A (1/120 s half-sine) - withstands IEC 61000-4-5 Level 4 surges without failure |
| Dynamic Impedance (ZZT) | 350 Ω at 2.5 mA - determines voltage deviation under load variation near regulation point |
| Reverse Leakage (IR) | 5 µA at 76 V - ensures minimal standby power loss in always-on protection circuits |
| Thermal Resistance (RθJL) | 25°C/W - enables junction temperature estimation from lead temperature in conduction-cooled layouts |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; two-terminal unidirectional device; polarity indicated by black band at cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side connection | Connected to lower-potential node during normal operation; carries full surge current during clamping |
| Cathode | Zener breakdown terminal / high-side connection | Connected to protected rail; voltage referenced to this node; marked by visible band |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tighter voltage margin control in precision clamp and reference designs vs. standard ±5% parts |
| 45 A peak surge rating | Supports robust protection against lightning-induced transients in industrial power supplies |
| DO-214AC mechanical compatibility | Ensures drop-in replacement for legacy 1N4764A-based layouts without footprint redesign |
| UL94V-0 flame-retardant epoxy | Meets safety requirements for enclosed power converters and medical equipment enclosures |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Clamping 12 V battery rail against load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting MCU power input and CAN transceiver supply. Use Value: Limits rail excursion to ≤100 V with 45 A surge capability, preventing latch-up in downstream logic. | Use Scenario: Stabilizing 5 V reference for analog sensor interfaces in harsh EMI environments. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ADC biasing and comparator thresholds. Use Value: Delivers ±2% accuracy and <5 µA leakage, minimizing offset error and quiescent current impact. |
| Telecom DC-DC Converter Output Clamp | Programmable Logic Controller Input Protection |
Use Scenario: Suppressing switching noise and flyback spikes on isolated 48 V output rails. IC Role / Device Role / Timing Role: Secondary-side transient voltage suppressor parallel to output capacitor. Use Value: Absorbs 100 ns–1 µs spikes with 350 Ω dynamic impedance, preserving output regulation stability. | Use Scenario: Protecting 24 V digital input channels from field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end surge limiter before optocoupler or Schmitt trigger input stage. Use Value: Withstands repeated 1 kV/500 A surges per IEC 61000-4-5 while maintaining <100 ns response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4764A-T | Same 100 V, 2 W rating but ±5% tolerance; no 'C' suffix; DO-41 through-hole package | Requires PCB footprint change and manual soldering; unsuitable for automated SMT lines | Select only for legacy through-hole designs where rework cost exceeds tolerance trade-off |
| MMSZ5265B-TP | 100 V, 500 mW, SOD-123 package; ±5% tolerance; 100 mA max IZM; 10× lower power rating | Limited to low-energy signal-level clamping; cannot replace SMAJ4764CE3/TR13 in power rail protection | Use only for low-current reference or bias networks where surge immunity is not required |
Compared with 1N4764A-T and MMSZ5265B-TP, SMAJ4764CE3/TR13 delivers superior surge handling (45 A vs. ≤10 A), tighter voltage control (±2% vs. ±5%), and SMT manufacturability-making it the sole choice for high-reliability 2 W power-rail clamping.
Availability
SMAJ4764CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom DC-DC converter output clamping, and programmable logic controller input protection requiring stable component supply across extended production lifecycles.
Supply support for SMAJ4764CE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMAJ47xx series was designed specifically for surface-mount overvoltage protection in ruggedized power systems, emphasizing surge robustness, thermal stability, and JEDEC-compliant packaging for automated assembly.
FAQ
What is the zener voltage tolerance of SMAJ4764CE3/TR13?
The 'C' suffix in SMAJ4764CE3/TR13 denotes ±2% zener voltage tolerance at 25°C, verified at 2.5 mA test current. This tighter tolerance enables more accurate voltage clamping than standard ±5% Zeners like SMAJ4764A, reducing design margin overhead in critical protection circuits. The SMAJ4764CE3/TR13 datasheet specifies 98.0–102.0 V range under thermal equilibrium conditions.
Can SMAJ4764CE3/TR13 replace 1N4764A in existing designs?
SMAJ4764CE3/TR13 is electrically equivalent to 1N4764A per manufacturer documentation but uses DO-214AC (SMA) surface-mount packaging versus DO-41 through-hole. While electrical parameters match, direct replacement requires PCB layout modification. The SMAJ4764CE3/TR13 offers improved surge rating (45 A vs. ~20 A) and ±2% tolerance, making it a functional upgrade where SMT is feasible.
What is the maximum steady-state power dissipation for SMAJ4764CE3/TR13?
SMAJ4764CE3/TR13 has a steady-state power dissipation rating of 2.0 W when mounted on 4.0 mm² copper pads per terminal, per MIL-STD-750 test conditions. Derating begins linearly above 100°C lead temperature, reaching zero power at 150°C junction temperature. This defines minimum copper area and thermal via requirements for reliable long-term operation in SMAJ4764CE3/TR13 applications.
How does the dynamic impedance of SMAJ4764CE3/TR13 affect regulation performance?
SMAJ4764CE3/TR13 exhibits 350 Ω dynamic impedance (ZZT) at 2.5 mA test current, meaning a 1 mA change in zener current causes ~350 mV shift in clamped voltage. This value directly impacts regulation tightness in reference circuits and transient suppression accuracy. Lower ZZT improves stability; SMAJ4764CE3/TR13's 350 Ω is typical for 100 V, 2 W Zeners and must be factored into error budget calculations.
What is the peak surge current rating for SMAJ4764CE3/TR13 and how is it measured?
SMAJ4764CE3/TR13 is rated for 45 A peak surge current (IS) under a 1/120 second half-sine waveform at 25°C ambient, per note 3 in the datasheet. This test simulates real-world lightning-induced transients and validates clamping integrity without degradation. The rating assumes proper PCB thermal mass; actual performance depends on trace width, copper area, and mounting technique in the final SMAJ4764CE3/TR13 implementation.
SMAJ4764CE3/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):
- 100 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 76 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
SMAJ4764CE3/TR13 FAQ
1.How can I place an order for SMAJ4764CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4764CE3/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 SMAJ4764CE3/TR13 reliable?
The price and inventory of SMAJ4764CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4764CE3/TR13 is usually 5 days.
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SMAJ4764CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4764CE3/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 SMAJ4764CE3/TR13?
For technical support, including SMAJ4764CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4764CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4764CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4764CE3/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 SMAJ4764CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4764CE3/TR13?
All SMAJ4764CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4764CE3/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 SMAJ4764CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4764CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4764CE3/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
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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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SMAZ12-13-F
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