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Microchip Technology 1N5346AE3/TR12
- Part No.:
- 1N5346AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346AE3/TR12.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,532
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Product details
Overview
1N5346AE3/TR12 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 9.1 V, ±10% tolerance (A suffix), 150 mA maximum Zener current (IZM), 2.0 Ω dynamic impedance (ZZ) at 150 mA test current, and operates from –65°C to +150°C. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and precision reference applications requiring stable 9.1 V clamping under varying load conditions.
For engineers reviewing the 1N5346AE3/TR12 datasheet, 1N5346AE3/TR12 pinout, 1N5346AE3/TR12 application, or 1N5346AE3/TR12 equivalent, key selection criteria include its 9.1 V Zener voltage, ±10% tolerance, 5.0 W power rating at 25°C lead temperature, low 2.0 Ω dynamic impedance, and RoHS-compliant e3 termination - all critical for reliable voltage reference design in industrial and aerospace power systems.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its Zener voltage is specified at 9.1 V ±10% with test current IZT = 150 mA, and exhibits 2.0 Ω dynamic impedance (ZZ) under those conditions. Voltage regulation (ΔVZ) is 0.22 V - measured as the difference between voltages at 10% and 50% of IZM.
Thermal resistance is 25 °C/W junction-to-lead (at 3/8" lead length) and 85 °C/W junction-to-ambient on FR4 board. Forward voltage is ≤1.2 V at 1.0 A, and it withstands non-recurring 8.3 ms half-sine surge currents up to 520 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±10% - defines precise clamping threshold for feedback and protection circuits |
| Power Dissipation (Pd) | 5.0 W at TL = 25°C - supports high-current regulation when adequately heat-sunk |
| Test Current (IZT) | 150 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 2.0 Ω at IZT - ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 7.5 μA at VR = 6.9 V - confirms low leakage below knee voltage |
| Surge Current (IZSM) | 520 A (8.3 ms half-sine) - enables robust transient overvoltage suppression |
| Operating Temp Range | –65°C to +150°C - suitable for extended-environment industrial and aerospace use |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; forms return path during regulation |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; connected to voltage source input; maintains 9.1 V relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Guarantees standardized performance, reliability, and interchangeability across qualified suppliers |
| ±10% voltage tolerance (A suffix) | Enables cost-optimized designs where tight regulation is not required, such as bulk supply clamping |
| RoHS-compliant e3 termination | Meets global environmental compliance without sacrificing solderability or thermal performance |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for special ESD workstations in production |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; provides stable 9.1 V reference for TL431 or similar shunt regulators. Use Value: Maintains ±10% output regulation across line/load/temperature with 2.0 Ω dynamic impedance minimizing feedback loop perturbation. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages above 9.1 V. IC Role / Device Role / Timing Role: Passive crowbar element absorbing energy from ESD or inductive kick events. Use Value: Withstands 520 A surge (8.3 ms) and holds clamped voltage within 0.22 V variation (ΔVZ), protecting downstream logic. |
| Precision Voltage Reference | Aerospace Power Monitoring |
Use Scenario: Provides stable 9.1 V reference for ADC biasing or analog sensor excitation in industrial controllers. IC Role / Device Role / Timing Role: Two-terminal passive reference source with predictable temperature coefficient and low noise. Use Value: Operates reliably from –65°C to +150°C and delivers <7.5 μA leakage at 6.9 V, ensuring accuracy in unregulated environments. | Use Scenario: Integrated into avionics power distribution units to monitor and limit bus voltage excursions. IC Role / Device Role / Timing Role: Primary overvoltage detection element triggering shutdown or fault logging at 9.1 V threshold. Use Value: Qualified to MIL-PRF-19500 screening levels (with MQ/MX/MV prefix); meets aerospace thermal and surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same 9.1 V nominal, but ±5% tolerance (B suffix) and 2.0 Ω ZZ at 150 mA - tighter regulation, same package | Preferred where higher accuracy is needed without changing layout or thermal design | Select 1N5346B when ±5% VZ stability is required; no PCB changes needed |
| MMBZ5240BLT1G | Surface-mount SOT-23, 10 V ±5%, 225 mW - lower power, different footprint and thermal profile | Suitable only for low-power signal-level referencing; not a drop-in replacement for 5 W dissipation | Choose MMBZ5240BLT1G only for space-constrained, low-current applications - requires new layout and derating analysis |
Compared with 1N5346B, the 1N5346AE3/TR12 trades voltage accuracy (±10% vs ±5%) for cost and availability in tape-and-reel; versus MMBZ5240BLT1G, it delivers 22× higher power handling and axial-lead mechanical robustness but requires through-hole mounting.
Availability
1N5346AE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision voltage reference designs requiring stable component supply across extended temperature ranges and high-reliability environments.
Supply support for 1N5346AE3/TR12 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zeners to deliver rugged, thermally efficient voltage regulation for mission-critical power systems where long-term stability and surge resilience are essential.
FAQ
What is the Zener voltage tolerance of the 1N5346AE3/TR12?
The 1N5346AE3/TR12 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. Its nominal regulation voltage is 9.1 V, meaning the actual measured VZ falls between 8.19 V and 10.01 V at 25°C lead temperature and 150 mA test current. This tolerance is confirmed in the manufacturer's electrical characteristics table and applies across the full operating temperature range.
Does the 1N5346AE3/TR12 require dry packing before PCB assembly?
No, the 1N5346AE3/TR12 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and may be stored and assembled without baking or humidity-controlled handling. This simplifies manufacturing logistics and eliminates floor-life tracking for this device.
What is the maximum surge current rating for the 1N5346AE3/TR12?
The 1N5346AE3/TR12 is rated for a maximum non-recurring surge current (IZSM) of 520 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated per manufacturer test conditions and reflects the device's ability to absorb transient energy without failure - critical for overvoltage protection applications.
Can the 1N5346AE3/TR12 be used in aerospace applications?
Yes - the 1N5346AE3/TR12 can be used in aerospace applications when ordered with appropriate military screening prefixes (e.g., MQ, MX, or MV). These versions meet MIL-PRF-19500 requirements for JAN, JANTX, or JANTXV qualification, including extended temperature operation, hermeticity, and radiation tolerance testing beyond commercial-grade 1N5346AE3/TR12.
What does the "e3" and "TR12" suffix mean in 1N5346AE3/TR12?
The "e3" suffix indicates RoHS-compliant matte-tin termination, while "TR12" denotes tape-and-reel packaging per EIA-296 standard with 12 mm tape width. Together, 1N5346AE3/TR12 specifies a lead-free, automated-assembly-ready version of the 9.1 V, ±10%, 5 W Zener diode in axial T-18 package.
1N5346AE3/TR12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 6.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5346AE3/TR12 FAQ
1.How can I place an order for 1N5346AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346AE3/TR12 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 1N5346AE3/TR12 reliable?
The price and inventory of 1N5346AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5346AE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346AE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346AE3/TR12?
1N5346AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346AE3/TR12 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 1N5346AE3/TR12?
For technical support, including 1N5346AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346AE3/TR12 requirements.
6.How does Aetrix verify that 1N5346AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5346AE3/TR12 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 1N5346AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5346AE3/TR12?
All 1N5346AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346AE3/TR12, 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 1N5346AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5346AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346AE3/TR12 Tags
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