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Microchip Technology SMAJ4760E3/TR13
- Part No.:
- SMAJ4760E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4760E3/TR13.pdf
- Description:
- DIODE ZENER 68V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,459
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Product details
Overview
SMAJ4760E3/TR13 from Vishay Semiconductor is a 2 W surface-mount silicon Zener diode with nominal zener voltage of 68 V ±5%, 3.7 mA test current, 150 Ω dynamic impedance at IZT, and 2000 mA peak surge current rating. It serves as a precision voltage regulator or overvoltage clamp in DC power supply feedback loops and transient protection circuits.
For engineers reviewing the SMAJ4760E3/TR13 datasheet, SMAJ4760E3/TR13 pinout, SMAJ4760E3/TR13 application, or SMAJ4760E3/TR13 equivalent, key selection criteria include zener tolerance (±5%), thermal resistance (25 °C/W), steady-state power dissipation (2.0 W), and DO-214AC package compatibility with automated SMT assembly.
Technical Context
This device operates in reverse breakdown mode to maintain stable reference voltage under regulated current conditions. Its 68 V zener voltage is specified at 3.7 mA test current (IZT) and exhibits 150 Ω dynamic impedance (ZZT) at that bias point, ensuring predictable regulation slope near knee voltage.
Designed for surface-mount use in high-reliability DC power systems, it supports surge handling up to 2000 mA per JEDEC-standard ½-sine wave pulse (1/120 s), with cathode band polarity marking and UL94V-0 flame-retardant epoxy encapsulation.
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 regulation windows |
| Power Dissipation (PAV) | 2.0 W - requires 4.0 mm² copper pads per terminal for thermal management at full load |
| Dynamic Impedance (ZZT) | 150 Ω @ 3.7 mA - defines regulation linearity and output voltage deviation under load changes |
| Peak Surge Current (IS) | 2000 mA - withstands short-duration transients per 1/120 s sine wave, critical for ESD/inductive spike suppression |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead thermal path enables operation up to +150 °C ambient when properly mounted |
| Reverse Leakage (IR) | <5 µA @ 51.7 V - ensures minimal standby current in high-impedance sensing or reference circuits |
Pinout & Package
DO-214AC (SMAJ) surface-mount package with molded epoxy body, cathode band marking, and flat handling surface for accurate pick-and-place placement. Dimensions conform to JEDEC standard except maximum width (0.115″ vs. standard 0.105″).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to lower-potential side in shunt regulation; must be routed with adequate current-carrying trace width |
| Cathode | Zener breakdown terminal / regulated voltage node | Marked by band; connects to input rail being clamped; determines reference polarity in feedback networks |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount flat handling surface | Enables high-accuracy automated placement on PCBs without tombstoning or rotation misalignment |
| JEDEC 1N4728A–1N4764A electrical equivalence | Allows drop-in replacement of legacy through-hole Zeners in redesigns without circuit revalidation |
| UL94V-0 flame-retardant epoxy | Meets safety requirements for enclosed industrial and automotive power modules |
| 260 °C soldering tolerance (10 s) | Compatible with standard lead-free reflow profiles without delamination or parameter shift |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 68 V threshold to error amplifier input. Use Value: Maintains ±1.5% output regulation across line/load variations due to tight 5% VZ tolerance and low ZZT. | Use Scenario: Clamping analog sensor output during ESD events in factory-floor instrumentation. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting 24 V sensor interface inputs from ±8 kV contact discharge. Use Value: Limits voltage excursion to ≤75 V during 2000 mA surge, preventing ADC input saturation and front-end damage. |
| Automotive Body Control Module | Programmable Logic Controller I/O Protection |
Use Scenario: Overvoltage protection for LIN bus transceiver power rails exposed to load-dump transients. IC Role / Device Role / Timing Role: Clamp diode absorbing 12 V system surges up to 35 V, referenced to vehicle ground. Use Value: Survives repeated 100 ms, 35 V pulses per ISO 7637-2 Pulse 5a without degradation, enabled by 2.0 W PAV rating. | Use Scenario: Input stage protection for 24 V digital I/O channels in PLC backplanes subjected to field wiring faults. IC Role / Device Role / Timing Role: Standby shunt regulator holding input at safe level until active driver engages. Use Value: Draws only <5 µA leakage at 51.7 V, minimizing false triggering while enabling fast response to >68 V faults. |
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 68 V ±5% VZ, 3.7 mA IZT, 150 Ω ZZT, but higher RθJA (50 °C/W) | Requires manual or wave soldering; unsuitable for high-density SMT layouts | Select when retrofitting legacy through-hole designs or where thermal mass of leaded package improves surge energy absorption |
| SMBJ4760A | DO-214AA (SMB) package; same 68 V rating but 3.0 W PAV and 1000 mA IS; larger footprint (4.6 × 3.9 mm vs. 4.5 × 2.7 mm) | Better power handling but incompatible pad layout; not a direct PCB replacement | Select when higher surge margin is required and board space allows SMB footprint revision |
Compared with 1N4760A and SMBJ4760A, SMAJ4760E3/TR13 offers optimal balance of SMT compatibility, 2.0 W power rating, and 2000 mA surge capability in the smallest standardized Zener outline-making it preferred for space-constrained, high-volume power management modules.
Availability
SMAJ4760E3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive body control modules, and programmable logic controller I/O protection requiring stable component supply and consistent parametric performance across production batches.
Supply support for SMAJ4760E3/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
Vishay Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for industrial, automotive, and computing applications.
The SMAJ47xxA series was engineered specifically for surface-mount voltage regulation and transient suppression in compact, thermally demanding DC power systems-emphasizing repeatable zener characteristics and robust surge survivability.
FAQ
What is the zener voltage tolerance for SMAJ4760E3/TR13?
The SMAJ4760E3/TR13 has a nominal zener voltage of 68 V with a tolerance of ±5%, as confirmed in the Electrical Characteristics table. This tolerance applies under standard test conditions (25°C, IZT = 3.7 mA) and is marked by the absence of a suffix letter-unlike C (±2%) or D (±1%) variants. The SMAJ4760E3/TR13 maintains this specification across its qualified operating temperature range of –55°C to +150°C.
Does SMAJ4760E3/TR13 support lead-free reflow soldering?
Yes, SMAJ4760E3/TR13 is rated for maximum soldering temperature of 260°C for 10 seconds, fully compliant with industry-standard lead-free reflow profiles. Its DO-214AC package uses epoxy meeting UL94V-0 flammability requirements and passes MIL-STD-750 Method 2026 solderability testing. No special pre-bake or moisture sensitivity handling is required prior to assembly.
How does the thermal resistance of SMAJ4760E3/TR13 affect its power derating?
SMAJ4760E3/TR13 has a junction-to-lead thermal resistance (RθJL) of 25°C/W. When mounted on 4.0 mm² copper pads per terminal, its 2.0 W steady-state power rating is valid up to 100°C lead temperature; above that, power must be linearly derated to zero at +150°C. This means at 125°C ambient, maximum allowable dissipation drops to 1.0 W to maintain safe junction temperature.
Can SMAJ4760E3/TR13 replace 1N4760A in existing designs?
SMAJ4760E3/TR13 is electrically equivalent to 1N4760A per manufacturer documentation, sharing identical zener voltage (68 V ±5%), test current (3.7 mA), and dynamic impedance (150 Ω). However, its DO-214AC surface-mount package requires PCB footprint revision-no direct pin-to-pin compatibility exists. It is suitable for redesigns prioritizing automated assembly and higher surge current (2000 mA vs. 1N4760A's 1300 mA).
What is the maximum reverse leakage current for SMAJ4760E3/TR13 at its rated clamp voltage?
At the specified test voltage of 51.7 V (75% of nominal VZ), SMAJ4760E3/TR13 guarantees maximum reverse leakage current (IR) of 5 µA. This low leakage ensures minimal loading on high-impedance reference nodes and prevents unintended current paths in precision feedback or sensor biasing circuits-critical for maintaining accuracy in closed-loop regulation systems.
SMAJ4760E3/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:
- ±10%
- 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
SMAJ4760E3/TR13 FAQ
1.How can I place an order for SMAJ4760E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4760E3/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 SMAJ4760E3/TR13 reliable?
The price and inventory of SMAJ4760E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4760E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4760E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4760E3/TR13 transactions.
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4.How is shipping managed for SMAJ4760E3/TR13?
SMAJ4760E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4760E3/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 SMAJ4760E3/TR13?
For technical support, including SMAJ4760E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4760E3/TR13 requirements.
6.How does Aetrix verify that SMAJ4760E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4760E3/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 SMAJ4760E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4760E3/TR13?
All SMAJ4760E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4760E3/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 SMAJ4760E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4760E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4760E3/TR13 Tags
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