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Microchip Technology 1N5365A/TR12
- Part No.:
- 1N5365A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5365A/TR12.pdf
- Description:
- DIODE ZENER 36V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,614
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Product details
Overview
1N5365A/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 36 V, ±10% tolerance (A suffix), 30 mA test current (IZT), 11 Ω dynamic impedance (ZZ), and maximum reverse current of 0.5 μA at 28.1 V (VR). 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 1N5365A/TR12 datasheet, 1N5365A/TR12 pinout, 1N5365A/TR12 application, or 1N5365A/TR12 equivalent, key selection criteria include Zener voltage tolerance, 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 in reverse-biased mode, maintaining stable output voltage across wide operating current (10–160 mA) and temperature ranges. Its low dynamic impedance (11 Ω) and tight voltage regulation (ΔVZ = 3.3 V) ensure minimal deviation under load transients.
The 1N5365A/TR12 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 (3/8″ from body), derating linearly above that point. Thermal resistance is 25 °C/W junction-to-lead and 85 °C/W junction-to-ambient on FR4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±10% - defines nominal regulation point; high-end VZM = 39.6 V sets IZM limit |
| Test Current (IZT) | 30 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 11 Ω - low AC impedance ensures stable regulation under varying load currents |
| Max Reverse Current (IR) | 0.5 μA @ 28.1 V - confirms sharp knee and low leakage below regulation threshold |
| Surge Current (IZSM) | 160 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W - enables 5 W operation with modest heatsinking (e.g., 3/8″ lead length) |
| Operating Temperature | –65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), cathode indicated by color band. Leads are annealed matte-tin plated (RoHS compliant), solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; forward voltage ≤1.2 V @ 1 A |
| Cathode | Zener regulation terminal / Output reference node | Banded end; reverse-biased to regulate at 36 V; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xx mechanical and electrical definitions |
| Moisture Sensitivity Level 1 | No dry pack required; safe for standard SMT reflow and manual assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling needed |
| High surge current capability | 160 A peak (8.3 ms) enables robust transient suppression without derating |
| Tight thermal resistance control | 25 °C/W junction-to-lead allows predictable thermal design with simple lead heatsinking |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing +36 V rail in programmable logic controller (PLC) power modules where input varies ±15%. IC Role / Device Role / Timing Role: Primary shunt voltage reference for feedback loop of isolated DC-DC converter. Use Value: Maintains regulation within ±3.3 V (ΔVZ) across 10–160 mA load range, ensuring ADC reference stability. |
Use Scenario: Providing precise 36 V reference for fuel injector driver ICs in diesel engine control units. IC Role / Device Role / Timing Role: Zener clamp protecting gate drive circuitry from load dump transients up to 120 V. Use Value: Withstands 160 A surge (8.3 ms) without degradation, meeting ISO 7637-2 Pulse 5a requirements. |
| Test Equipment Calibration Reference | Telecom Line Card Overvoltage Protection |
Use Scenario: Serving as traceable voltage standard in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Stable 36 V reference source for DAC output scaling and error correction algorithms. Use Value: ±10% tolerance and <0.5 μA leakage at 28.1 V enable repeatable 4½-digit accuracy over temperature. |
Use Scenario: Clamping secondary-side surges on -48 V telecom line cards exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Shunt protector placed before DC-DC converter input stage. Use Value: Low 11 Ω dynamic impedance limits clamping voltage overshoot during fast-rising transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B/TR12 | ±5% tolerance (vs. ±10%); same VZ, IZT, ZZ, and package | Higher precision required in feedback loops where ΔVZ margin is constrained | Select when tighter regulation tolerance justifies cost premium |
| 1N5365C/TR12 | ±2% tolerance; otherwise identical electrical and thermal specs | Used in metrology-grade references or high-reliability aerospace systems | Choose only if system-level calibration requires sub-1% absolute voltage drift |
Compared with 1N5365A/TR12, the B-suffix variant improves voltage tolerance from ±10% to ±5% without changing thermal or surge performance, while the C-suffix extends precision to ±2%-both retain identical pinout, package, and 36 V nominal regulation, making them direct functional alternatives where tighter spec compliance is mandated.
Availability
1N5365A/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU reference voltage, and telecom line card overvoltage protection requiring stable component supply and full traceability.
Supply support for 1N5365A/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zeners delivering stable voltage regulation across extreme temperatures and surge conditions, targeting mission-critical power integrity applications.
FAQ
What is the Zener voltage tolerance of the 1N5365A/TR12?
The 1N5365A/TR12 has a nominal Zener voltage of 36 V with a ±10% tolerance, as indicated by the "A" suffix per Microsemi's datasheet. This means the actual measured VZ at 30 mA test current falls between 32.4 V and 39.6 V at 25 °C lead temperature. The 1N5365A/TR12 is not rated for tighter tolerances unless re-screened or replaced with B- or C-suffix variants.
Can the 1N5365A/TR12 be used in surface-mount designs?
No-the 1N5365A/TR12 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly. Microsemi offers surface-mount equivalents such as SMBJ5365B for SMC packages, but the 1N5365A/TR12 requires through-hole mounting with 3/8″ lead length for thermal derating compliance. Using it in SMT reflow would violate its mechanical and thermal specifications.
What is the maximum surge current rating for the 1N5365A/TR12?
The 1N5365A/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 160 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating assumes proper PCB layout (e.g., short traces, adequate copper pour) and is validated per Microsemi's test methodology. Exceeding this value risks irreversible junction damage.
How does the thermal resistance of the 1N5365A/TR12 affect its power handling?
The 1N5365A/TR12 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W. At 25 °C lead temperature, it safely dissipates 5 W; above that, power must be linearly derated-e.g., at 75 °C lead temp, max power drops to 3 W. Mounting on FR4 with 4 mm² copper pads raises RθJA to 85 °C/W, limiting ambient-rated power to 1.47 W at 25 °C ambient.
Is the 1N5365A/TR12 RoHS compliant?
Yes-the "TR12" suffix indicates tape-and-reel packaging, and the base part 1N5365A is RoHS compliant per Microsemi's e3 designation. Its leads feature annealed matte-tin plating, qualified to MIL-STD-750 Method 2026, and the epoxy body meets UL94V-0 flammability standards. No lead or halogen content exceeds EU RoHS limits.
1N5365A/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:
- ±10%
- 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
1N5365A/TR12 FAQ
1.How can I place an order for 1N5365A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5365A/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 1N5365A/TR12 reliable?
The price and inventory of 1N5365A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5365A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5365A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5365A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5365A/TR12?
1N5365A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5365A/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 1N5365A/TR12?
For technical support, including 1N5365A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5365A/TR12 requirements.
6.How does Aetrix verify that 1N5365A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5365A/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 1N5365A/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5365A/TR12?
All 1N5365A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5365A/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 1N5365A/TR12 part is unused and in its original packaging.
Return procedure for 1N5365A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5365A/TR12 Tags
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