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Microchip Technology SMAJ4760AE3/TR13
- Part No.:
- SMAJ4760AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4760AE3/TR13.pdf
- Description:
- DIODE ZENER 68V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,794
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Product details
Overview
SMAJ4760AE3/TR13 from Microsemi (now Microchip Technology) is a 2 W surface-mount silicon Zener diode with a nominal zener voltage of 68 V ±5%, 3.7 mA test current, 150 Ω dynamic impedance at IZT, and 65 A peak surge current capability. It serves as a precision voltage reference and overvoltage clamp in DC power supply regulation circuits.
For engineers reviewing the SMAJ4760AE3/TR13 datasheet, SMAJ4760AE3/TR13 pinout, SMAJ4760AE3/TR13 application, or SMAJ4760AE3/TR13 equivalent, key selection criteria include its DO-214AC (SMAJ) package, 25 °C/W junction-to-lead thermal resistance, -55 °C to +150 °C operating temperature range, and compliance with JEDEC 1N47xxA series electrical equivalence.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and transient events. Its 68 V nominal zener voltage is specified at 3.7 mA test current (IZT) with 150 Ω dynamic impedance (ZZT) and 51.7 V minimum knee voltage (VZK at 0.25 mA).
Designed for surface-mount reliability, it features a cathode band polarity indicator, UL94V-0 flame-retardant epoxy encapsulation, and solderability per MIL-STD-750 Method 2026. Maximum steady-state power dissipation is 2.0 W when mounted on 4.0 mm² copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% - precise clamping threshold at 3.7 mA, suitable for 65–71 V protection windows |
| Test Current (IZT) | 3.7 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZT) | 150 Ω - low incremental resistance ensures minimal voltage shift under small-signal load changes |
| Peak Surge Current (IS) | 65 A - withstands 8/20 µs transients per IEC 61000-4-5 Level 4 without degradation |
| Power Dissipation (PAV) | 2.0 W - requires 4.0 mm² copper pad per lead for thermal management at full rating |
| Junction-to-Lead RθJL | 25 °C/W - enables thermal design with predictable junction temperature rise under continuous operation |
| Operating Temperature | -55 °C to +150 °C - supports automotive under-hood and industrial control environments |
Pinout & Package
DO-214AC (SMAJ) surface-mount package with molded plastic body, flat handling surface for pick-and-place accuracy, and cathode band indicating the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-voltage reference node | Connected to circuit ground or lower-potential rail during Zener operation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to protected line; voltage clamped to 68 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N47xxA Electrical Equivalence | Direct functional replacement for through-hole 1N4760A in space-constrained layouts |
| High Surge Current Rating | 65 A peak (½ sine, 1/120 s) enables robust ESD and lightning surge suppression |
| Surface-Mount Flat Handling Surface | Ensures accurate placement and coplanarity on automated SMT lines |
| UL94V-0 Flame-Retardant Epoxy | Meets safety standards for enclosed industrial and consumer power supplies |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener reference providing fixed 68 V threshold to optocoupler input or TL431 bias network. Use Value: Maintains ±5% output voltage accuracy across line/load/temperature with 150 Ω dynamic impedance limiting regulation error. | Use Scenario: Clamping induced transients on 48 V telecom distribution bus during hot-swap events. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 68 V to ground before downstream ICs experience overstress. Use Value: Withstands 65 A surge without parametric shift, preserving system uptime and eliminating fuse dependency. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module |
Use Scenario: Protecting analog front-end inputs of 24 V-powered pressure sensors from load-dump spikes. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at sensor connector interface. Use Value: 25 °C/W thermal resistance allows direct PCB copper pour heatsinking, enabling sustained 2 W clamping without derating. | Use Scenario: Regulating auxiliary 68 V rail for LED driver ICs in headlamp modules. IC Role / Device Role / Timing Role: Precision Zener reference setting constant-current source threshold. Use Value: ±5% tolerance and sharp knee (0.25 mA IZK) ensure stable LED brightness across -40 °C to +125 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4760A | Through-hole DO-41 package; identical electrical specs (68 V, 3.7 mA, 150 Ω) | Requires PCB through-hole mounting and wave soldering; unsuitable for high-density SMT designs | Select when legacy board rework or mixed-technology assembly is required |
| SMBJ68A | Higher 600 W peak power rating; same 68 V VZ but 100 A IS; DO-214AA package (larger footprint) | Better suited for high-energy surge environments (e.g., AC mains input), but over-spec'd for low-power regulation | Select when IEC 61000-4-5 Level 5 immunity is mandated and board area permits larger package |
Compared with 1N4760A and SMBJ68A, SMAJ4760AE3/TR13 delivers optimal balance of SMT compatibility, 2 W steady-state regulation, and 65 A transient handling in the industry-standard DO-214AC footprint-making it ideal for compact DC-DC converters and embedded power rails where thermal and layout constraints are critical.
Availability
SMAJ4760AE3/TR13 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and industrial sensor signal conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for SMAJ4760AE3/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 for aerospace, defense, and industrial markets.
The SMAJ47xxA series was designed specifically for surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding power systems-emphasizing JEDEC compatibility, surge robustness, and extended temperature operation.
FAQ
What is the zener voltage tolerance of SMAJ4760AE3/TR13?
SMAJ4760AE3/TR13 has a nominal zener voltage of 68 V with a ±5% tolerance, as indicated by the absence of a tolerance suffix (e.g., 'C' for 2% or 'D' for 1%). This tolerance is verified at 3.7 mA test current and 25 °C ambient, and applies across the full -55 °C to +150 °C operating temperature range per the manufacturer's datasheet MSC0284A.
Is SMAJ4760AE3/TR13 compatible with standard JEDEC 1N4760A footprints?
No-SMAJ4760AE3/TR13 uses the DO-214AC (SMAJ) surface-mount package, while 1N4760A uses the through-hole DO-41 package. Though electrically equivalent, their mechanical footprints are incompatible. SMAJ4760AE3/TR13 requires SMT pad layout per Microchip's recommended land pattern, not the 1N4760A through-hole drill pattern.
What is the maximum steady-state power dissipation for SMAJ4760AE3/TR13?
The maximum steady-state power dissipation for SMAJ4760AE3/TR13 is 2.0 W at 25 °C ambient, provided it is mounted on 4.0 mm² copper pads per terminal. Power must be linearly derated above 100 °C lead temperature, reaching zero at 150 °C, as defined in Note 3 of the MSC0284A datasheet.
Does SMAJ4760AE3/TR13 meet UL94V-0 flammability requirements?
Yes-SMAJ4760AE3/TR13 uses flame-retardant epoxy encapsulation rated to UL94V-0, as explicitly stated in the Mechanical Data section of the MSC0284A datasheet. This makes it suitable for use in enclosed power supplies and safety-critical industrial equipment where material flammability compliance is mandatory.
What is the peak surge current rating for SMAJ4760AE3/TR13?
SMAJ4760AE3/TR13 has a peak surge current rating of 65 A, measured using a ½ sine wave pulse of 1/120 second duration at 25 °C ambient. This rating reflects its capability to absorb transient energy without parametric shift or failure, supporting IEC 61000-4-5 Level 4 surge immunity in end equipment.
SMAJ4760AE3/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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 51.7 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
SMAJ4760AE3/TR13 FAQ
1.How can I place an order for SMAJ4760AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4760AE3/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 SMAJ4760AE3/TR13 reliable?
The price and inventory of SMAJ4760AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4760AE3/TR13 is usually 5 days.
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SMAJ4760AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4760AE3/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 SMAJ4760AE3/TR13?
For technical support, including SMAJ4760AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4760AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4760AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4760AE3/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 SMAJ4760AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4760AE3/TR13?
All SMAJ4760AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4760AE3/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 SMAJ4760AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4760AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4760AE3/TR13 Tags
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