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Microchip Technology SMAJ4761CE3/TR13
- Part No.:
- SMAJ4761CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4761CE3/TR13.pdf
- Description:
- DIODE ZENER 75V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,584
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Product details
Overview
SMAJ4761CE3/TR13 from Microsemi (now Microchip) is a 2 W surface-mount Zener diode with a nominal zener voltage of 75 V ±2%, 3.3 mA test current, 175 Ω dynamic impedance at IZT, and 2000 mA peak surge current capability; used for precision voltage regulation and overvoltage protection in DC power rails and interface circuits.
For engineers reviewing the SMAJ4761CE3/TR13 datasheet, SMAJ4761CE3/TR13 pinout, SMAJ4761CE3/TR13 application, or SMAJ4761CE3/TR13 equivalent, key selection criteria include ±2% voltage tolerance, DO-214AC package thermal resistance (25°C/W), cathode-band polarity marking, and compliance with MIL-STD-750 solderability standards.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 75 V nominal zener voltage is specified at 3.3 mA test current with 175 Ω dynamic impedance, ensuring low regulation error across operating current range.
Designed for surface-mount assembly on FR-4 PCBs with 4.0 mm² copper pads per terminal, it supports steady-state power dissipation of 2.0 W at TL ≤ 100°C and derates linearly to zero at 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±2% at 3.3 mA - enables precise clamping in 72–78 V supply monitoring circuits |
| Power Dissipation (PAV) | 2.0 W - requires 4.0 mm² copper pad per terminal for thermal management |
| Dynamic Impedance (ZZT) | 175 Ω @ 3.3 mA - limits regulation error to <1.2 V across 1–10 mA load variation |
| Peak Surge Current (IS) | 2000 mA - withstands 8/20 µs transient surges up to 150 W (per IEC 61000-4-5) |
| Reverse Leakage (IR) | 5 µA @ 60 V - ensures minimal standby current in high-impedance bias networks |
| Junction Temp Range | −55°C to +150°C - supports operation in automotive engine control and industrial motor drive environments |
Pinout & Package
DO-214AC (SMAJ) surface-mount package with cathode band marking on one end; flat handling surface for accurate pick-and-place placement; terminals solderable per MIL-STD-750 Method 2026; max solder temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to lower-potential side of regulated circuit; forms return path during forward bias |
| Cathode | Zener breakdown terminal / voltage clamp node | Connected to higher-potential rail; maintains 75 V reference when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tight regulation without post-production trimming in feedback loops for SMPS and LDOs |
| 2000 mA peak surge rating | Provides robust ESD and lightning-induced transient suppression in telecom line interfaces |
| DO-214AC mechanical compatibility | Ensures drop-in replacement for JEDEC 1N4761C and industry-standard SMA footprint designs |
| UL94V-0 flame-retardant epoxy | Meets safety requirements for enclosed power supplies and medical equipment enclosures |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing 75 V auxiliary rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener voltage reference for op-amp comparator threshold setting and ADC reference scaling. Use Value: ±2% tolerance ensures consistent trip point across temperature, reducing calibration drift in field-deployed units. | Use Scenario: Providing stable 75 V clamp for CAN transceiver VCC input during load-dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Overvoltage protection device shunting excess energy to ground before IC damage occurs. Use Value: 2000 mA surge rating absorbs 150 W transient pulses without degradation, extending ECU lifetime. |
| Telecom Line Interface Protection | Test Equipment Voltage Calibration |
Use Scenario: Protecting Ethernet PHY receiver inputs against induced surges on long-haul twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor (TVS) configured as unidirectional Zener clamp. Use Value: Low 175 Ω dynamic impedance minimizes clamping voltage overshoot during fast-rising transients (≤1 ns rise time). | Use Scenario: Serving as traceable 75 V reference standard in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Precision voltage reference element in resistive divider networks for metrology-grade instruments. Use Value: 2% tolerance and −55°C to +150°C operating range enable stable reference performance across environmental test chambers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4761C | Same 75 V ±2%, 2 W rating, but in DO-41 through-hole package | Requires PCB rework for through-hole mounting; unsuitable for high-density SMT layouts | Select when legacy through-hole design or manual prototyping is required |
| MMSZ5261B | 75 V ±5%, 500 mW rating, SOD-123 package; lower surge capacity (500 mA) | Insufficient for >1 W transient suppression; limited to low-power signal-level clamping | Select only for space-constrained, low-energy bias networks where 2 W rating is unnecessary |
Compared with 1N4761C and MMSZ5261B, SMAJ4761CE3/TR13 delivers superior thermal performance (25°C/W vs. ~60°C/W for DO-41), higher surge immunity (2000 mA vs. 1500 mA), and SMT manufacturability-making it optimal for production-grade 75 V regulation in automotive and industrial systems.
Availability
SMAJ4761CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU voltage reference, and telecom line interface protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ4761CE3/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 voltage regulation and transient suppression in harsh-environment power systems where precision, surge resilience, and thermal stability are critical.
FAQ
What is the zener voltage tolerance for SMAJ4761CE3/TR13?
The SMAJ4761CE3/TR13 has a nominal zener voltage of 75 V with a ±2% tolerance, indicated by the 'C' suffix per manufacturer documentation. This tighter tolerance enables accurate voltage clamping in feedback networks where regulation stability is critical, such as in switched-mode power supply output sensing. The SMAJ4761CE3/TR13 achieves this specification at 3.3 mA test current and 25°C ambient temperature.
Does SMAJ4761CE3/TR13 meet UL94V-0 flammability requirements?
Yes, SMAJ4761CE3/TR13 uses flame-retardant epoxy conforming to UL94V-0, as stated in the mechanical data section of its official datasheet. This certification ensures safe operation in enclosed electronic assemblies where fire propagation risk must be minimized, including industrial control cabinets and medical power supplies. The SMAJ4761CE3/TR13's UL94V-0 compliance is verified per standardized vertical burning tests.
What is the maximum steady-state power dissipation for SMAJ4761CE3/TR13?
The SMAJ4761CE3/TR13 is rated for 2.0 W steady-state power dissipation at lead temperature ≤100°C, with linear derating to zero at 150°C junction temperature. This rating assumes mounting on 4.0 mm² copper pads per terminal per datasheet Note 2 and 3. Exceeding these thermal conditions risks parametric shift or catastrophic failure. The SMAJ4761CE3/TR13's thermal resistance is 25°C/W junction-to-lead.
Is SMAJ4761CE3/TR13 compatible with automated SMT assembly processes?
Yes, SMAJ4761CE3/TR13 features a DO-214AC (SMAJ) package with a flat handling surface optimized for accurate pick-and-place placement, and is supplied on tape-and-reel (TR13). It meets MIL-STD-750 Method 2026 solderability requirements and supports reflow profiles up to 260°C for 10 seconds. The SMAJ4761CE3/TR13's mechanical dimensions and polarity marking (cathode band) are fully compatible with Class III SMT lines.
What is the peak surge current rating for SMAJ4761CE3/TR13?
The SMAJ4761CE3/TR13 has a peak surge current rating of 2000 mA, measured using a ½ sine wave pulse of 1/120 second duration at 25°C ambient. This rating reflects its ability to absorb transient energy from sources like ESD, inductive switching, or load dump-critical in automotive and industrial applications. The SMAJ4761CE3/TR13 maintains parameter integrity after such events when operated within datasheet limits.
SMAJ4761CE3/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):
- 75 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 175 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 56 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
SMAJ4761CE3/TR13 FAQ
1.How can I place an order for SMAJ4761CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4761CE3/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 SMAJ4761CE3/TR13 reliable?
The price and inventory of SMAJ4761CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4761CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4761CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4761CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4761CE3/TR13?
SMAJ4761CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4761CE3/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 SMAJ4761CE3/TR13?
For technical support, including SMAJ4761CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4761CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4761CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4761CE3/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 SMAJ4761CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4761CE3/TR13?
All SMAJ4761CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4761CE3/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 SMAJ4761CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4761CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4761CE3/TR13 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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