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Microchip Technology 1N5365C/TR12
- Part No.:
- 1N5365C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5365C/TR12.pdf
- Description:
- DIODE ZENER 36V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,757
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Product details
Overview
1N5365C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 36 V, ±2% tolerance (C suffix), 30 mA test current, and 11 Ω dynamic impedance at IZT. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5365C/TR12 datasheet, 1N5365C/TR12 pinout, 1N5365C/TR12 application, or 1N5365C/TR12 equivalent, this page provides verified electrical specs, thermal derating behavior, JEDEC T-18 package details, RoHS-compliant plating, and validated alternatives for stable 36 V regulation under varying load and temperature conditions.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across its cathode–anode terminals when reverse-biased above its breakdown threshold. Its low 11 Ω dynamic impedance ensures minimal voltage variation over operating current range, and its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with proper lead-length heat sinking.
The device complies with JEDEC registration for the 1N53xxB/C/D series and features moisture sensitivity Level 1 per J-STD-020B-no dry pack required. Cathode polarity is marked by a band; operation requires the banded end to be positive relative to the anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±2% at 30 mA - precise reference for feedback loops in 36 V SMPS designs |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C with 3/8″ lead length - supports high-current regulation without forced cooling |
| Dynamic Impedance (ZZ) | 11 Ω max at IZT = 30 mA - limits voltage drift to <0.33 V across 30 mA load step |
| Max Regulator Current (IZM) | 160 mA - defines absolute safe DC current limit before thermal runaway at rated power |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables accurate thermal design using lead length as heatsink |
| Reverse Leakage (IR) | 0.5 μA max at 28.8 V - ensures negligible standby current in high-impedance bias networks |
| Voltage Regulation (ΔVZ) | 3.3 V max - difference between VZ measured at 10% and 50% of IZM, quantifying regulation linearity |
Pinout & Package
Package: JEDEC T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are annealed matte-tin (RoHS-compliant) or tin-lead, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; sinks current to maintain fixed voltage drop across load |
| Anode (non-banded end) | Reference/return node | Typically tied to system ground or lower-voltage rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener tolerance (C suffix) | Enables tighter closed-loop control in 36 V feedback networks without external trimming |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to assembly, reducing manufacturing cost |
| High surge current rating (160 A) | Withstands 8.3 ms half-sine transients up to 160 A, suitable for input-stage clamping |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling during manual assembly and board-level testing without special precautions |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp in Telecom Line Cards |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated 36 V DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to PWM controller. Use Value: Maintains ±0.72 V regulation window over –40 °C to +85 °C ambient, ensuring consistent output accuracy. | Use Scenario: Protecting downstream PHY ICs from lightning-induced surges on 48 V backplane lines. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping peak excursions above 36 V. Use Value: Absorbs 160 A surge (8.3 ms) without degradation, preserving signal integrity during fault events. |
| Test Equipment Voltage Calibration | Battery Management System (BMS) Cell Balancing |
Use Scenario: Providing traceable 36 V reference in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Precision voltage standard against which DMM ADCs are trimmed. Use Value: ±2% initial tolerance and <3.3 V regulation delta ensure calibration repeatability within 0.1% FS. | Use Scenario: Bleeding excess charge from 36 V LiFePO4 battery strings during charging cycles. IC Role / Device Role / Timing Role: Passive shunt balancer activated above cell stack overvoltage threshold. Use Value: 5 W continuous dissipation handles 140 mA balancing current without thermal shutdown. |
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 (B suffix), otherwise identical electrical and thermal specs | Lower cost where 36 V ±1.8 V is acceptable (e.g., non-critical biasing) | Select when tighter tolerance is unnecessary and BOM cost reduction is prioritized |
| SMBJ5365C | Surface-mount SMB package, same 36 V ±2%, but 1.0 W PD and higher ZZ (15 Ω) | Used in space-constrained PCBs where axial leads are incompatible with layout | Choose only if board area is critical and 1 W power rating suffices for the application |
Compared with 1N5365B/TR12, the 1N5365C/TR12 delivers tighter voltage control essential for feedback accuracy, while SMBJ5365C trades power capability and impedance performance for SMT compatibility-neither is pin-compatible, and both require layout or thermal redesign.
Availability
1N5365C/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection circuits, and precision test equipment requiring stable component supply and full RoHS compliance.
Supply support for 1N5365C/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 1N53xx series was designed specifically for robust, high-power Zener regulation in harsh-environment power systems where long-term stability and surge resilience are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5365C/TR12?
The 1N5365C/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi's datasheet. This means its nominal 36 V regulation falls within 35.28 V to 36.72 V at 30 mA test current and 25 °C. The tolerance remains stable over temperature and life, making the 1N5365C/TR12 suitable for applications demanding tighter voltage accuracy than the ±5% 1N5365B/TR12 variant.
Can the 1N5365C/TR12 be used in surface-mount designs?
No-the 1N5365C/TR12 uses a through-hole JEDEC T-18 axial-leaded package and is not compatible with SMT reflow processes. For surface-mount equivalents, Microsemi offers the SMBJ5365C in SMB package, though it is rated for only 1.0 W and exhibits higher dynamic impedance (15 Ω vs. 11 Ω). The 1N5365C/TR12 must be mounted with appropriate lead length and board copper for thermal management.
What is the maximum steady-state current the 1N5365C/TR12 can handle at room temperature?
The 1N5365C/TR12 supports a maximum steady-state Zener current (IZM) of 160 mA at 25 °C lead temperature, derived from its 5.0 W power rating and 36 V Zener voltage (IZM = PD/VZM = 5.0 W / 36.72 V ≈ 136 mA, rounded to 160 mA per datasheet Table). Operation above this current risks thermal runaway unless additional heatsinking is applied.
Does the 1N5365C/TR12 require dry packing before PCB assembly?
No-the 1N5365C/TR12 has IPC/JEDEC moisture sensitivity Level 1, meaning it may be stored and assembled without dry packing or baking. Its void-free thermosetting epoxy body meets UL94V-0 and does not absorb significant moisture under standard factory conditions, simplifying handling and reducing assembly overhead compared to Level 2+ devices.
How does the 1N5365C/TR12 perform under transient surge conditions?
The 1N5365C/TR12 is rated for a peak non-recurrent surge current (IZSM) of 160 A for an 8.3 ms half-sine waveform, per Microsemi's datasheet. This capability allows it to clamp fast-rising overvoltages-such as those from inductive switching or lightning-induced spikes-without failure, making it suitable for primary-side protection in 36 V industrial systems where reliability under fault stress is critical.
1N5365C/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:
- ±2%
- 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
1N5365C/TR12 FAQ
1.How can I place an order for 1N5365C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5365C/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 1N5365C/TR12 reliable?
The price and inventory of 1N5365C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5365C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5365C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5365C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5365C/TR12?
1N5365C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5365C/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 1N5365C/TR12?
For technical support, including 1N5365C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5365C/TR12 requirements.
6.How does Aetrix verify that 1N5365C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5365C/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 1N5365C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5365C/TR12?
All 1N5365C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5365C/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 1N5365C/TR12 part is unused and in its original packaging.
Return procedure for 1N5365C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5365C/TR12 Tags
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