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Microchip Technology 1N5346AE3/TR13
- Part No.:
- 1N5346AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346AE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
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Product details
Overview
1N5346AE3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 9.1 V, ±10% tolerance (A suffix), 2.0 Ω maximum dynamic impedance at 150 mA test current, and 520 Ω maximum knee impedance at 1.0 mA. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5346AE3/TR13 datasheet, 1N5346AE3/TR13 pinout, 1N5346AE3/TR13 application, or 1N5346AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, surge current rating (9.2 A), thermal resistance (25 °C/W junction-to-lead), reverse leakage (<7.5 µA at 7.2 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current variation (150 mA IZT, up to 520 mA IZM). Its low 25 °C/W junction-to-lead thermal resistance enables high-power operation with minimal heatsinking when leads are trimmed to 10 mm.
It exhibits 0.22 V voltage regulation (ΔVZ) between 10% and 50% of IZM, confirming tight regulation stability under load shifts. The cathode band marking and axial T-18 package support manual or automated through-hole assembly on FR4 PCBs with 1 oz copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±10% - defines nominal regulation point under 150 mA test current; actual range 8.19–10.01 V. |
| Power Dissipation | 5.0 W at 25 °C lead temperature - supports continuous regulation in compact power rails with adequate heatsinking. |
| Dynamic Impedance (ZZ) | 2.0 Ω max @ 150 mA - ensures minimal output voltage shift during current transients in feedback loops. |
| Max Reverse Leakage (IR) | 7.5 µA @ 7.2 V - guarantees low standby power loss in battery-backed or energy-sensitive circuits. |
| Surge Current (IZSM) | 9.2 A peak (8.3 ms half-sine) - withstands common AC line surges and inductive kickback without failure. |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - enables direct thermal path to chassis or PCB copper for reliability. |
| Operating Temperature | –65 °C to +150 °C - suitable for automotive engine compartments and industrial control enclosures. |
Pinout & Package
T-18 axial-leaded plastic package (void-free UL94V-0 epoxy body); cathode indicated by colored band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in reverse bias | Connected to lower-potential node (e.g., ground or return rail) during regulation. |
| Cathode | Regulated output terminal | Banded end; connected to higher-potential node (e.g., supply rail) to clamp voltage at VZ. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Guarantees standardized electrical behavior and interchangeability across qualified suppliers. |
| Moisture Sensitivity Level 1 | No dry-pack required - simplifies handling, storage, and SMT reflow compatibility for hybrid assemblies. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly or field service. |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU and China RoHS II; no lead, mercury, cadmium, or hexavalent chromium. |
| High surge current capability | 9.2 A non-recurrent half-sine (8.3 ms) - protects downstream circuitry from transient overvoltages. |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
|
Use Scenario: Stabilizing unregulated 12 V DC input to deliver consistent 9.1 V reference for analog sensor front-ends. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing passive voltage clamping and error correction. Use Value: Maintains ±0.22 V regulation (ΔVZ) across 52–260 mA load current, enabling <1% ADC reference drift. |
Use Scenario: Clamping induced transients on 10 V logic rail caused by relay coil de-energization. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 9.2 A surge energy within 8.3 ms. Use Value: Limits rail excursion to ≤10.01 V (max VZ + ΔVZ), preventing latch-up in 3.3 V I/O buffers. |
| Industrial Sensor Excitation | Automotive Battery Monitoring |
|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in PLC analog modules. IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance (2.0 Ω). Use Value: Reduces excitation error contribution to <0.02% FS due to minimal current-dependent VZ shift. |
Use Scenario: Monitoring 12 V vehicle battery health via microcontroller ADC with internal 3.3 V reference. IC Role / Device Role / Timing Role: Level-shifting and scaling element converting 0–16 V battery range to 0–3.3 V ADC input. Use Value: Enables accurate 10-bit resolution down to ±0.03 V using 9.1 V Zener-based resistor divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | ±5% tolerance (vs. ±10% for 1N5346AE3/TR13); same VZ, IZT, ZZ, and package. | Higher precision required in voltage reference designs where ±0.46 V tolerance is unacceptable. | Select 1N5346B when tighter regulation stability justifies cost premium; otherwise 1N5346AE3/TR13 suffices for general-purpose clamping. |
| MMBZ5240BS | Surface-mount SOT-23 package; 100 mW rating (vs. 5 W); 9.1 V ±5%; not drop-in compatible. | Used only in space-constrained, low-power signal-level applications-not for power rail regulation. | Choose MMBZ5240BS only for portable electronics with strict footprint limits; avoid for any 5 W load scenario. |
Compared with 1N5346B and MMBZ5240BS, the 1N5346AE3/TR13 uniquely balances cost-effective axial mounting, 5 W power handling, and ±10% tolerance-making it optimal for industrial power supply and protection circuits where absolute precision is secondary to robustness and thermal performance.
Availability
1N5346AE3/TR13 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and industrial sensor excitation requiring stable component supply and long-term obsolescence management.
Supply support for 1N5346AE3/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5346AE3/TR13?
The 1N5346AE3/TR13 has a ±10% Zener voltage tolerance, as indicated by the "A" suffix in its part number. This means its regulated voltage falls between 8.19 V and 10.01 V at 25 °C with 150 mA test current. This tolerance is confirmed in Microsemi's official datasheet revision D (2008) under Electrical Characteristics and Note 1.
Does the 1N5346AE3/TR13 require dry packing before PCB assembly?
No, the 1N5346AE3/TR13 does not require dry packing because it is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B. Its void-free epoxy encapsulation prevents moisture absorption, eliminating bake requirements prior to reflow or wave soldering.
What is the maximum surge current rating for the 1N5346AE3/TR13?
The 1N5346AE3/TR13 is rated for a maximum non-recurrent surge current (IZSM) of 9.2 A, defined as the peak of an 8.3 ms half-sine waveform. This value is specified in the Electrical Characteristics table on page 1 of the Microsemi datasheet and reflects its capability to absorb transient energy without degradation.
How is polarity marked on the 1N5346AE3/TR13?
The 1N5346AE3/TR13 uses a cathode band to indicate polarity: the banded end is the cathode and must be connected to the more positive potential during regulation. This marking is consistent across the entire 1N5333B–1N5388B family and is documented in the Mechanical and Packaging section of the datasheet.
Is the 1N5346AE3/TR13 RoHS compliant?
Yes, the "e3" suffix in 1N5346AE3/TR13 explicitly denotes RoHS compliance per EU Directive 2011/65/EU. The device uses annealed matte-tin plating on leads and meets all restricted substance thresholds, including lead, mercury, cadmium, and hexavalent chromium.
1N5346AE3/TR13 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/TR13 FAQ
1.How can I place an order for 1N5346AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346AE3/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 1N5346AE3/TR13 reliable?
The price and inventory of 1N5346AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346AE3/TR13 is usually 5 days.
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Once your 1N5346AE3/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 1N5346AE3/TR13?
For technical support, including 1N5346AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346AE3/TR13 requirements.
6.How does Aetrix verify that 1N5346AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5346AE3/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 1N5346AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5346AE3/TR13?
All 1N5346AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346AE3/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 1N5346AE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5346AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346AE3/TR13 Tags
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