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Microchip Technology 1N5366C/TR8
- Part No.:
- 1N5366C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366C/TR8.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,570
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Product details
Overview
1N5366C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 39 V, ±2% tolerance (C suffix), 30 mA test current, 14 Ω dynamic impedance at IZT, and maximum reverse current of 0.5 μA at 29.7 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5366C/TR8 datasheet, 1N5366C/TR8 pinout, 1N5366C/TR8 application, or 1N5366C/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (170 A), voltage regulation (ΔVZ = 3.1 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its design centers on stable Zener conduction across wide current (10–50% of IZM) and temperature ranges, enabled by low dynamic impedance and tight ±2% voltage tolerance.
The 1N5366C/TR8 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 5 W steady-state dissipation at 25 °C lead temperature and 3.1 V voltage regulation (ΔVZ) between 10% and 50% of maximum Zener current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±2% - precise regulation point for feedback networks requiring high stability |
| Test Current (IZT) | 30 mA - defined operating point for measuring VZ and ZZ |
| Dynamic Impedance (ZZ) | 14 Ω at IZT - low AC resistance ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 0.5 μA at 29.7 V - guarantees negligible leakage below regulation threshold |
| Max Zener Current (IZM) | 170 mA - maximum DC current before exceeding 5 W power limit at TL = 25 °C |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables high-current operation with minimal heatsinking when leads are 10 mm from body |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, cathode indicated by band, matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to input voltage source and load; maintains 39 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop control vs. ±5% (B) or ±10% (A) variants, reducing need for external trimming |
| Moisture sensitivity Level 1 per J-STD-020B | No dry pack required prior to PCB assembly, simplifying handling and storage logistics |
| 170 A non-recurrent surge current (8.3 ms half-sine) | Withstands transient overvoltage events such as EFT or lightning-induced surges without degradation |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Eliminates need for special ESD handling during manual assembly or board rework |
| RoHS-compliant e3 marking option | Meets EU Directive 2011/65/EU requirements with annealed matte-tin plating, no lead or brominated flame retardants |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback path of isolated 48 V DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 39 V reference to TL431-like error amplifier input. Use Value: ±2% tolerance ensures output regulation within ±1% over line/load/temperature, meeting EN 62368-1 safety margins. | Use Scenario: Provides excitation voltage for 4–20 mA current-loop pressure transmitters in oil & gas field instrumentation. IC Role / Device Role / Timing Role: Precision Zener reference establishing stable bias for analog front-end op-amps and DACs. Use Value: Low ΔVZ (3.1 V) and 0.5 μA leakage minimize drift in 0.1% accuracy sensor outputs over –40 °C to +85 °C. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Clamps 48 V telecom bus against surges exceeding 50 V during hot-swap or lightning events. IC Role / Device Role / Timing Role: Two-terminal crowbar element conducting above 39 V to divert fault current to fuse or TVS. Use Value: 170 A surge rating handles 8.3 ms transients per IEC 61000-4-5 Level 4 without parametric shift. | Use Scenario: Sets trip point for comparator-based battery undervoltage lockout in 36 V LiFePO4 systems. IC Role / Device Role / Timing Role: Stable 39 V reference compared against scaled battery voltage via resistor divider. Use Value: Tight ±2% tolerance ensures consistent 34.2–35.1 V shutdown threshold across production lots and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B/TR8 | Same 39 V nominal voltage but ±5% tolerance (B suffix) and higher ΔVZ (3.1 V vs. 3.1 V - identical value, but B-grade has wider statistical spread) | Suitable where cost-sensitive designs accept looser regulation; not recommended for <0.5% system accuracy targets | Select 1N5366C/TR8 when ±2% tolerance is required for closed-loop stability or calibration-critical references |
| MMSZ5267ET1G | Surface-mount SOD-123 package, 39 V ±5%, 500 mW rating, 30 Ω ZZ, 100 nA IR at 29.7 V | Used in space-constrained PCBs; insufficient power handling for >100 mA regulation loads | Choose MMSZ5267ET1G only for low-power signal-level references; 1N5366C/TR8 remains necessary for 5 W dissipation and surge robustness |
Compared with 1N5366B/TR8 and MMSZ5267ET1G, the 1N5366C/TR8 uniquely delivers ±2% tolerance in a 5 W axial package with 170 A surge capability-making it irreplaceable for industrial power supplies requiring both precision and ruggedness.
Availability
1N5366C/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage protection clamps, and programmable threshold detectors requiring stable component supply and long-term obsolescence management.
Supply support for 1N5366C/TR8 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 timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for high-stability, high-power Zener regulation in harsh-environment power systems-emphasizing thermal robustness, surge immunity, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5366C/TR8?
The 1N5366C/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix per Microsemi's documentation. This means its actual regulation voltage falls between 38.22 V and 39.78 V at 25 °C with 30 mA test current. The tighter tolerance supports precision feedback and reference applications where ±5% variants like 1N5366B/TR8 would introduce unacceptable error.
Does the 1N5366C/TR8 require dry packing before PCB assembly?
No, the 1N5366C/TR8 does not require dry packing. It carries moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking. This eliminates process steps and risk of moisture-related popcorning during reflow, unlike MSL 2a or higher components.
What is the maximum surge current rating for the 1N5366C/TR8?
The 1N5366C/TR8 is rated for a maximum non-recurrent surge current (IZSM) of 170 A, specified as the peak of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without parametric shift or failure, making it suitable for protecting downstream circuitry against lightning-induced surges or inductive switching spikes in industrial power rails.
How is polarity marked on the 1N5366C/TR8?
The 1N5366C/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to operate in Zener breakdown mode. During installation, the banded end connects to the voltage source or regulated node, while the unbanded (anode) end connects to ground or the return path-reversal will result in forward conduction (~1.2 V drop) instead of regulation.
Is the 1N5366C/TR8 RoHS compliant?
Yes, the 1N5366C/TR8 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5366C/TR8e3). The standard version features RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026 and void-free UL94V-0 epoxy packaging-meeting EU Directive 2011/65/EU requirements without lead or brominated flame retardants.
1N5366C/TR8 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):
- 39 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 28.1 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
1N5366C/TR8 FAQ
1.How can I place an order for 1N5366C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366C/TR8 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 1N5366C/TR8 reliable?
The price and inventory of 1N5366C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5366C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5366C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5366C/TR8?
1N5366C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366C/TR8 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 1N5366C/TR8?
For technical support, including 1N5366C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366C/TR8 requirements.
6.How does Aetrix verify that 1N5366C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5366C/TR8 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 1N5366C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5366C/TR8?
All 1N5366C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366C/TR8, 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 1N5366C/TR8 part is unused and in its original packaging.
Return procedure for 1N5366C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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