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Microchip Technology 1N5366A/TR8
- Part No.:
- 1N5366A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366A/TR8.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,480
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Product details
Overview
1N5366A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 39 V, ±10% tolerance (A suffix), 30 mA test current, and 14 Ω maximum dynamic impedance at IZT. 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 1N5366A/TR8 datasheet, 1N5366A/TR8 pinout, 1N5366A/TR8 application, or 1N5366A/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 mode. Its Zener voltage is specified at 39 V ±10% under 30 mA DC test current (IZT) at 25 °C lead temperature, with dynamic impedance measured at 1 kHz AC superimposed on IZT.
It delivers stable regulation across wide current (10–50% of IZM) and temperature ranges, supported by low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length) and high surge capability (170 A, 8.3 ms half-sine). Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±10% - defines regulated output voltage under nominal bias; tolerance impacts reference accuracy in feedback loops. |
| Test Current (IZT) | 30 mA - standard DC current at which VZ is measured; sets baseline operating point for regulation stability. |
| Dynamic Impedance (ZZ) | 14 Ω max - quantifies AC resistance in breakdown; lower value improves load regulation and ripple rejection. |
| Max Regulator Current (IZM) | 170 mA - maximum continuous DC current at 25 °C lead temp; determines power handling with heatsinking. |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ at 10% and 50% of IZM; indicates line regulation performance across operating current range. |
| Surge Current (IZSM) | 170 A (8.3 ms half-sine) - peak non-repetitive surge capability; enables transient overvoltage clamping without failure. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - defines temperature rise per watt at 10 mm lead length; critical for thermal design in high-power applications. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-201AD; void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in forward bias; referenced ground node in Zener regulation | Connected to system ground or low-side return path; reverse-biased during regulation operation. |
| Cathode (banded end) | Current exit terminal in forward bias; regulated output node in Zener mode | Connected to input rail or voltage source; maintains stable 39 V relative to anode when reverse-biased above knee. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener diode | Ensures standardized mechanical dimensions, marking, and electrical behavior across global supply chain. |
| ±10% voltage tolerance (A suffix) | Provides cost-optimized regulation accuracy suitable for non-critical reference and clamp applications. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-enables direct placement without baking. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected assembly environments. |
| RoHS-compliant option (e3 suffix) | Meets environmental compliance mandates without performance trade-offs; matte-tin plating ensures solderability. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output voltage. IC Role / Device Role / Timing Role: Voltage reference element setting error amplifier threshold; provides stable 39 V reference for TL431-like comparator function. Use Value: Maintains ±1.5% output regulation across line/load/temperature due to tight ΔVZ (3.1 V) and low ZZ (14 Ω). | Use Scenario: Clamps 24 V sensor supply rail against transients induced by solenoid switching in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Overvoltage protection device shunting surge energy to ground before downstream op-amps are damaged. Use Value: Withstands 170 A surge (8.3 ms) without degradation, enabling robust field reliability without additional TVS stages. |
| Programmable Logic Controller (PLC) Input Protection | Automotive Body Control Module Reference |
Use Scenario: Protects 24 V digital input channel of industrial PLC against EFT bursts and inductive kickback from relay coils. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point; operates in reverse breakdown during fault events. Use Value: Low thermal resistance (25 °C/W) allows sustained 170 mA operation with minimal PCB copper heatsinking-reduces board area vs. SMD alternatives. | Use Scenario: Provides stable 39 V reference for analog-to-digital conversion of battery voltage monitoring circuit in 12 V automotive BCM. IC Role / Device Role / Timing Role: Precision voltage reference source feeding ADC reference divider network; operates within −40 °C to +125 °C ambient. Use Value: Guaranteed operation from −65 °C to +150 °C junction temperature supports extended automotive thermal envelope without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B/TR8 | ±5% tolerance (vs. ±10%); otherwise identical electrical specs and package | Higher reference accuracy required in feedback loops where tighter output regulation is mandated | Select 1N5366B/TR8 when ±5% VZ tolerance is needed; same footprint and thermal profile. |
| MMBZ5267B-TP | Surface-mount SOD-123 package; 39 V ±5%; 225 mW power rating (vs. 5 W) | Space-constrained PCBs where axial lead mounting is impractical; not suitable for high-current regulation | Choose MMBZ5267B-TP only for low-power signal-level clamping; cannot replace 1N5366A/TR8 in 5 W applications. |
Compared with 1N5366B/TR8, the 1N5366A/TR8 offers lower-cost regulation where ±10% tolerance is acceptable; versus MMBZ5267B-TP, it delivers 22× higher power dissipation and axial-mount mechanical robustness for industrial power rails.
Availability
1N5366A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and programmable logic controller input protection requiring stable component supply and long-term lifecycle support.
Supply support for 1N5366A/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge immunity, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5366A/TR8?
The 1N5366A/TR8 has a Zener voltage tolerance of ±10%, as indicated by the "A" suffix per Microsemi documentation. This means its regulated voltage falls between 35.1 V and 42.9 V at 30 mA test current and 25 °C lead temperature. The 1N5366A/TR8 is intended for applications where this tolerance band is acceptable for reference or clamping functions.
Does the 1N5366A/TR8 require dry packing or baking before PCB assembly?
No, the 1N5366A/TR8 has moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb significant moisture during standard handling and requires no dry pack or baking prior to reflow. This simplifies manufacturing flow and reduces risk of popcorning during soldering-confirmed in Microsemi's official datasheet revision D.
What is the maximum continuous current rating for the 1N5366A/TR8?
The 1N5366A/TR8 has a maximum continuous Zener current (IZM) of 170 mA at 25 °C lead temperature (TL), corresponding to its 5.0 W power rating at that condition. Derating applies above 25 °C per Figure 1 in the datasheet; at TL = 75 °C, IZM drops to approximately 110 mA. The 1N5366A/TR8 must be mounted with adequate heatsinking to sustain full-rated current.
Can the 1N5366A/TR8 be used as a direct replacement for the 1N5366B/TR8?
The 1N5366A/TR8 is not a direct replacement for the 1N5366B/TR8 in applications requiring ±5% Zener voltage tolerance, as the "A" suffix denotes ±10% tolerance versus "B"'s ±5%. Electrically and mechanically identical otherwise, the 1N5366A/TR8 may be substituted only if the system design accommodates the wider voltage band-no PCB changes are needed, but functional verification is required.
What is the surge current rating of the 1N5366A/TR8 and how is it defined?
The 1N5366A/TR8 has a maximum non-repetitive surge current (IZSM) of 170 A, defined as the peak value of a single 8.3 ms half-sine waveform. This rating enables the 1N5366A/TR8 to absorb transient energy from inductive loads or EFT events without failure, making it suitable for industrial clamping applications where short-duration overcurrents occur.
1N5366A/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:
- ±10%
- 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
1N5366A/TR8 FAQ
1.How can I place an order for 1N5366A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366A/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 1N5366A/TR8 reliable?
The price and inventory of 1N5366A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5366A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5366A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5366A/TR8?
1N5366A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366A/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 1N5366A/TR8?
For technical support, including 1N5366A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366A/TR8 requirements.
6.How does Aetrix verify that 1N5366A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5366A/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 1N5366A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5366A/TR8?
All 1N5366A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366A/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 1N5366A/TR8 part is unused and in its original packaging.
Return procedure for 1N5366A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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