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Microchip Technology 1N5365/TR8
- Part No.:
- 1N5365/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5365/TR8.pdf
- Description:
- DIODE ZENER 36V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
1N5365/TR8 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 reverse current of 0.5 μA at 27.4 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 1N5365/TR8 datasheet, 1N5365/TR8 pinout, 1N5365/TR8 application, or 1N5365/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (160 A), voltage regulation (ΔVZ = 3.3 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, maintaining stable output voltage across wide current (30 mA to 160 mA) and temperature (–65 °C to +150 °C) ranges. Its low dynamic impedance (11 Ω) and tight voltage regulation (ΔVZ = 3.3 V) ensure minimal output variation under load transients.
The 1N5365/TR8 uses a void-free thermosetting epoxy T-18 package with cathode band marking, rated for 5 W steady-state dissipation at 25 °C lead temperature, and derates linearly above 25 °C with 25 °C/W thermal resistance junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - defines regulated output voltage under 30 mA test current |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - sets maximum continuous DC power handling with adequate heatsinking |
| Dynamic Impedance (ZZ) | 11 Ω at IZT = 30 mA - determines output voltage stability against current changes |
| Maximum Reverse Current (IR) | 0.5 μA at VR = 27.4 V - ensures low leakage in standby or high-impedance bias networks |
| Surge Current (IZSM) | 160 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 3.3 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with 3/8″ (10 mm) lead length from body |
Pinout & Package
Package: Axial-leaded T-18 plastic case with void-free thermosetting epoxy body (UL94V-0), cathode indicated by colored band, leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Reverse-biased regulation terminal | Banded end; connected to unregulated input or positive rail to clamp voltage at 36 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and electrical behavior across global supply chain |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly planning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU and supports environmentally compliant product certification |
| High surge current capability | Withstands 160 A non-repetitive surges, enabling use in transient suppression without external crowbar |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Excitation |
|---|---|
Use Scenario: Regulates error amplifier reference in isolated flyback or forward converter feedback loop. IC Role / Device Role / Timing Role: Zener reference diode providing stable 36 V reference for optocoupler biasing and TL431 replacement. Use Value: Maintains ±5% output voltage accuracy across line/load/temperature with 11 Ω dynamic impedance limiting feedback loop perturbation. | Use Scenario: Supplies excitation voltage to 4–20 mA current-loop pressure or temperature transmitters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable bias point for analog front-end circuitry. Use Value: Delivers <0.5 μA leakage at 27.4 V, minimizing offset error in high-impedance sensor bridges and instrumentation amplifiers. |
| Overvoltage Protection Clamp | Programmable Voltage Threshold Detector |
Use Scenario: Clamps transient spikes on 24 V DC distribution rails in factory automation controllers. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting surge energy above 36 V to ground. Use Value: Absorbs up to 160 A (8.3 ms) surge without degradation, protecting downstream MOSFETs and microcontrollers. | Use Scenario: Sets trip threshold for comparator-based brown-out or overvoltage detection in embedded systems. IC Role / Device Role / Timing Role: Stable voltage reference feeding non-inverting input of rail-to-rail comparator. Use Value: Enables 36 V threshold with ±5% tolerance and <3.3 V regulation delta, ensuring consistent detection across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B | No TR8 tape-and-reel packaging; bulk or ammo pack only | Lacks automated SMT placement compatibility; requires manual or vibratory feed handling | Select when board-level assembly uses hand-soldering or bulk dispensing and tape cost sensitivity is high |
| SMBJ5365B | Surface-mount SMB package (JEDEC DO-214AA); same electrical specs but 125 °C/W RθJA | Requires PCB layout change; unsuitable for through-hole prototyping or legacy axial designs | Select for space-constrained, high-volume SMT production where reflow compatibility and board density are prioritized |
Compared with 1N5365/TR8, the 1N5365B lacks tape-and-reel convenience for pick-and-place, while SMBJ5365B trades axial mounting flexibility for surface-mount scalability-both retain identical 36 V ±5% regulation but differ in thermal path and assembly integration.
Availability
1N5365/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning circuits, and overvoltage protection systems requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5365/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for robust, high-power 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 1N5365/TR8?
The 1N5365/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its full designation. This means its actual regulation voltage falls within 34.2 V to 37.8 V at 30 mA test current and 25 °C lead temperature, as confirmed in Microsemi's official 1N5333B–1N5388B datasheet Rev D.
Does the 1N5365/TR8 require dry packing before soldering?
No, the 1N5365/TR8 does not require dry packing. It carries Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has no floor-life limitation and can be stored and assembled without baking or humidity-controlled environments-verified in the "Mechanical and Packaging" section of the Microsemi datasheet.
What is the maximum surge current rating for the 1N5365/TR8?
The 1N5365/TR8 is rated for a maximum non-repetitive surge current (IZSM) of 160 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is specified in the "Electrical Characteristics" table and supports transient clamping in industrial power rails without device failure.
Can the 1N5365/TR8 replace the 1N5365B in existing designs?
Yes-the 1N5365/TR8 is functionally and electrically identical to the 1N5365B, differing only in packaging: TR8 denotes EIA-296 tape-and-reel format (8 mm carrier tape, 1000 pcs/reel), whereas 1N5365B is supplied in bulk or ammo pack. No circuit or layout changes are needed for substitution.
What is the forward voltage specification for the 1N5365/TR8?
The forward voltage of the 1N5365/TR8 is specified as a maximum of 1.2 V at 1.0 A forward current, per the "Maximum Ratings" table in the Microsemi datasheet. This parameter applies during forward conduction (anode positive), not during Zener regulation mode.
1N5365/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):
- 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/TR8 FAQ
1.How can I place an order for 1N5365/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5365/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 1N5365/TR8 reliable?
The price and inventory of 1N5365/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5365/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5365/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5365/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5365/TR8?
1N5365/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5365/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 1N5365/TR8?
For technical support, including 1N5365/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5365/TR8 requirements.
6.How does Aetrix verify that 1N5365/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5365/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 1N5365/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5365/TR8?
All 1N5365/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5365/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 1N5365/TR8 part is unused and in its original packaging.
Return procedure for 1N5365/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5365/TR8 Tags
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