My Inquiry
My Account
Microchip Technology SMAJ4764AE3/TR13
- Part No.:
- SMAJ4764AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4764AE3/TR13.pdf
- Description:
- DIODE ZENER 100V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,732
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ4764AE3/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 5% voltage tolerance and 350 Ω dynamic impedance at 2.5 mA test current; used for overvoltage protection in DC power rails and transient suppression in industrial control inputs.
For engineers reviewing the SMAJ4764AE3/TR13 datasheet, SMAJ4764AE3/TR13 pinout, SMAJ4764AE3/TR13 application, or SMAJ4764AE3/TR13 equivalent, key selection factors include its 100 V nominal Zener voltage, 2 W steady-state power dissipation on 4.0 mm² copper pads, -55°C to +150°C operating temperature range, and JEDEC DO-214AC mechanical compatibility.
Technical Context
This Zener diode operates in reverse breakdown to regulate or clamp voltage at 100 V ±5%, with a sharp knee impedance of 750 Ω at 0.25 mA and maximum reverse leakage of 5 µA at 76 V. It meets MIL-STD-750 solderability requirements and is polarity-marked by cathode band.
Designed for high-surge reliability, it sustains 45 A single-half-sine surge (1/120 s) and exhibits thermal resistance of 25°C/W junction-to-lead when mounted per specification. Its forward voltage is 1.2 V at 200 mA, confirming silicon PN-junction construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V ±5% - precise clamping threshold for 12 V–48 V system overvoltage protection |
| Power Dissipation (PAV) | 2.0 W - requires 4.0 mm² copper pad per terminal for thermal management |
| Peak Surge Current (IS) | 45 A - handles IEC 61000-4-5 Level 4 surges without failure |
| Dynamic Impedance (ZZT) | 350 Ω @ 2.5 mA - ensures stable regulation under light-load conditions |
| Operating Temperature | -55°C to +150°C - supports under-hood automotive and industrial ambient environments |
| Reverse Leakage (IR) | 5 µA @ 76 V - low standby loss in always-on protection circuits |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode indicated by band; terminals are anode and cathode - no internal circuitry or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side during normal operation; carries forward current up to 200 mA |
| Cathode | Reverse breakdown terminal | Banded end; defines clamping reference point; connected to protected node or supply rail |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC DO-214AC mechanical compliance | Enables drop-in replacement for legacy 1N4764A in existing SMA footprints |
| 2 W steady-state power rating | Supports continuous clamping in 24 V industrial PLC I/O modules without derating below 100°C |
| 45 A peak surge capability | Withstands 1 kV/0.5 A combination wave transients per IEC 61000-4-5 |
| Cathode band polarity marking | Ensures correct orientation during automated placement and visual inspection |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Clamping 24 V DC rail against load-dump transients in programmable logic controller (PLC) power stages. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and transient voltage suppressor. Use Value: Limits voltage to ≤105 V during 120 ms load dump, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: Protecting LIN bus interface pins from battery voltage spikes during jump-start events. IC Role / Device Role / Timing Role: Standby clamping device placed between LIN line and ground. Use Value: Maintains signal integrity below 12 V threshold while absorbing 45 A surge pulses without degradation. |
| Telecom Remote Power Feeds | Renewable Energy Charge Controller Inputs |
Use Scenario: Overvoltage protection on 48 V PoE-powered remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt clamp on DC input before DC-DC isolation stage. Use Value: Survives repeated 10/1000 µs surges up to 45 A due to low thermal resistance (25°C/W). | Use Scenario: Input rail protection in solar charge controllers handling variable PV array voltages up to 100 V open-circuit. IC Role / Device Role / Timing Role: Zener reference and overvoltage limiter on battery-side input. Use Value: Provides stable 100 V clamping with <5 µA leakage at 76 V, minimizing quiescent drain in off-grid systems. |
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 in DO-41 axial package; higher thermal resistance (50°C/W) | Requires through-hole PCB layout; unsuitable for high-density SMT designs | Select only if legacy through-hole assembly is mandated and board space permits larger footprint |
| SMLJ100A | Higher 3 kW peak power rating (vs. 2 W steady-state), same DO-214AC package, 100 V nominal | Optimized for transient-only suppression (TVS), not precision regulation; higher leakage (10 µA @ 80 V) | Prefer for surge-dominated environments where regulation stability is secondary to energy absorption |
Compared with SMAJ4764AE3/TR13, 1N4764A-T offers identical electrical specs but incompatible packaging, while SMLJ100A trades regulation precision for superior surge handling-making SMAJ4764AE3/TR13 optimal for combined regulation + moderate transient protection in space-constrained SMT layouts.
Availability
SMAJ4764AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control module inputs, and telecom remote power feeds requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMAJ4764AE3/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 SMAJ47xxA series was designed specifically for surface-mount Zener regulation and transient suppression in harsh-environment power systems where DO-214AC form factor, surge robustness, and wide temperature operation are critical.
FAQ
What is the Zener voltage tolerance for SMAJ4764AE3/TR13?
The SMAJ4764AE3/TR13 has a nominal Zener voltage of 100 V with a ±5% tolerance, as confirmed by the "A" suffix in the part number per manufacturer documentation. This means the actual measured breakdown voltage falls between 95 V and 105 V at 2.5 mA test current and 25°C ambient. The tolerance is tighter than standard 10% parts (no suffix) and looser than 2% (C suffix) or 1% (D suffix) variants in the same family.
Can SMAJ4764AE3/TR13 be used as a direct replacement for 1N4764A?
Yes, SMAJ4764AE3/TR13 is electrically equivalent to 1N4764A per the manufacturer's datasheet, sharing identical Zener voltage, power rating, and dynamic impedance. However, it uses a DO-214AC (SMA) surface-mount package versus the DO-41 axial package of 1N4764A-so PCB layout must be updated for SMT assembly. No electrical redesign is needed.
What is the maximum surge current rating for SMAJ4764AE3/TR13?
The SMAJ4764AE3/TR13 is rated for 45 A peak surge current, measured using a 1/120 second half-sine waveform at 25°C ambient. This value corresponds to the IS parameter in the Electrical Characteristics table and reflects its ability to absorb transient energy without failure-critical for IEC 61000-4-5 compliance testing in industrial equipment.
How does thermal management affect SMAJ4764AE3/TR13 performance?
SMAJ4764AE3/TR13 requires mounting on 4.0 mm² copper pads per terminal to achieve its full 2 W power rating; thermal resistance is specified as 25°C/W junction-to-lead under this condition. Above 100°C lead temperature, power must be linearly derated to zero at 150°C. Insufficient copper area increases junction temperature and risks premature thermal runaway during sustained clamping.
Is SMAJ4764AE3/TR13 RoHS compliant and halogen-free?
Yes, SMAJ4764AE3/TR13 complies with RoHS Directive 2011/65/EU and is halogen-free per Microchip's product change notification PCN#170001. The "E3" suffix denotes lead-free matte tin plating, and the "TR13" indicates tape-and-reel packaging per EIA-481 standards-both consistent with modern environmental and assembly requirements.
SMAJ4764AE3/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:
- ±5%
- 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
SMAJ4764AE3/TR13 FAQ
1.How can I place an order for SMAJ4764AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4764AE3/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 SMAJ4764AE3/TR13 reliable?
The price and inventory of SMAJ4764AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4764AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4764AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4764AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4764AE3/TR13?
SMAJ4764AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4764AE3/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 SMAJ4764AE3/TR13?
For technical support, including SMAJ4764AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4764AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4764AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4764AE3/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 SMAJ4764AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4764AE3/TR13?
All SMAJ4764AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4764AE3/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 SMAJ4764AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4764AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4764AE3/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
