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Microchip Technology 1N5365/TR12
- Part No.:
- 1N5365/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5365/TR12.pdf
- Description:
- DIODE ZENER 36V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,137
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Product details
Overview
1N5365/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 36 V, ±5% tolerance (B suffix), 30 mA test current, 11 Ω dynamic impedance at IZT, and maximum surge current of 160 A for 8.3 ms. 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 1N5365/TR12 datasheet, 1N5365/TR12 pinout, 1N5365/TR12 application, or 1N5365/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), steady-state power rating (5 W at TL < 25°C), reverse leakage (<0.5 µA at 25.9 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 Zener voltage is specified at 36 V ±5% under 30 mA DC test current, with low dynamic impedance (11 Ω) ensuring stable regulation across load variations. The 25 °C/W thermal resistance enables high-current operation when mounted with 3/8″ lead length from body.
It exhibits minimal voltage regulation drift (ΔVZ = 3.3 V between 10% and 50% of IZM), withstands 8.3 ms half-sine surge currents up to 160 A, and maintains ≤0.5 µA reverse leakage at 25.9 V - critical for low-power standby circuits and precision biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - defines regulated output level in shunt regulator designs |
| Test Current (IZT) | 30 mA - operating point where VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 11 Ω at IZT - low AC impedance ensures tight voltage regulation under varying load |
| Max Surge Current (IZSM) | 160 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - allows 5 W dissipation with modest heatsinking at lead |
| Reverse Leakage (IR) | ≤0.5 µA at 25.9 V - enables low-quiescent-current bias networks |
| Operating Temperature | –65°C to +150°C - suitable for industrial and automotive under-hood environments |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-201AD; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in shunt regulation; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / regulation output reference | Banded end; connected to higher-potential rail; establishes 36 V reference relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard DO-201AD mechanical and electrical definitions |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT handling and storage logistics |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - robust handling in assembly environments |
| RoHS compliant (e3) | Lead-free matte-tin plating meets environmental compliance without performance trade-off |
| High surge current rating | 160 A peak for 8.3 ms - protects downstream circuitry from line transients |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Biasing |
|---|---|
Use Scenario: Regulates error amplifier reference in isolated flyback converter feedback network. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 36 V threshold for optocoupler-driven control loop. Use Value: Tight ±5% tolerance and low ΔVZ (3.3 V) maintain output regulation within ±1.5% over line/load variation. | Use Scenario: Provides stable excitation voltage for bridge-based pressure transducers in factory automation. IC Role / Device Role / Timing Role: Precision Zener reference supplying constant 36 V bias to Wheatstone bridge. Use Value: ≤0.5 µA leakage and –65°C to +150°C operation ensure accuracy across wide ambient ranges. |
| Overvoltage Clamp for 24 V Systems | Programmable Threshold Detector |
Use Scenario: Clamps 24 V rail transients above 36 V in railway control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between rail and ground. Use Value: 160 A surge rating and 25 °C/W RθJL enable repeated 100 V/10 A spikes without degradation. | Use Scenario: Sets trip point for comparator-based battery undervoltage lockout at 36 V. IC Role / Device Role / Timing Role: Stable reference input to LM393 comparator hysteresis network. Use Value: 11 Ω ZZ minimizes reference shift under comparator input bias current loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B | Same 36 V ±5%, but in bulk packaging (no TR12 tape-and-reel); identical electrical specs | Not optimized for automated pick-and-place; requires manual or bulk-feed placement | Select 1N5365/TR12 for SMT production; choose 1N5365B for prototyping or low-volume hand assembly |
| MMSZ5245B-TP | Surface-mount SOD-123 package; 36 V ±5%; 500 mW rating; ZZ = 25 Ω at 10 mA | Limited to low-power applications; unsuitable for >500 mW continuous dissipation | Use MMSZ5245B-TP only where board space is constrained and power <0.5 W; retain 1N5365/TR12 for 5 W thermal capability |
Compared with 1N5365B and MMSZ5245B-TP, the 1N5365/TR12 uniquely combines 5 W power handling, axial-leaded through-hole compatibility, tape-and-reel automation support, and industrial temperature range - making it optimal for high-reliability power regulation where thermal margin and assembly scalability matter.
Availability
1N5365/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5365/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems - emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5365/TR12?
The 1N5365/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its full designation. This means its measured VZ falls between 34.2 V and 37.8 V at 30 mA test current and 25°C lead temperature. The tolerance is guaranteed per JEDEC specification and verified during 100% lot testing.
Does the 1N5365/TR12 require dry packing before PCB assembly?
No, the 1N5365/TR12 does not require dry packing. It carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, meaning it is non-hygroscopic and safe for standard storage and reflow without baking or moisture barrier bags - simplifying inventory and assembly logistics.
What is the maximum continuous power dissipation for the 1N5365/TR12 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5365/TR12 has a steady-state power rating of 1.47 W at 25°C ambient. Derating begins above 25°C at 11.8 mW/°C, reaching zero at 150°C ambient - consistent with its 85°C/W junction-to-ambient thermal resistance.
Can the 1N5365/TR12 be used as a direct replacement for the 1N5365B in existing designs?
Yes, the 1N5365/TR12 is electrically and mechanically identical to the 1N5365B except for packaging: both share identical Zener voltage, tolerance, dynamic impedance, thermal resistance, and temperature range. The "TR12" suffix denotes EIA-296 tape-and-reel packaging for automated placement - no circuit or layout changes are needed.
What is the reverse leakage current specification for the 1N5365/TR12?
The 1N5365/TR12 specifies maximum reverse leakage current of 0.5 µA at 25.9 V (90% of nominal VZ). This value is measured at 25°C and reflects the device's ability to maintain low standby current in bias and reference applications - critical for battery-powered or energy-efficient systems.
1N5365/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):
- 36 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25.9 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
1N5365/TR12 FAQ
1.How can I place an order for 1N5365/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5365/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 1N5365/TR12 reliable?
The price and inventory of 1N5365/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5365/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5365/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5365/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5365/TR12?
1N5365/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5365/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 1N5365/TR12?
For technical support, including 1N5365/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5365/TR12 requirements.
6.How does Aetrix verify that 1N5365/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5365/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 1N5365/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5365/TR12?
All 1N5365/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5365/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 1N5365/TR12 part is unused and in its original packaging.
Return procedure for 1N5365/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5365/TR12 Tags
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