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Microchip Technology 1N5366BE3/TR8
- Part No.:
- 1N5366BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366BE3/TR8.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,459
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Product details
Overview
1N5366BE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 39 V, ±5% tolerance (B suffix), 30 mA test current, and 14 Ω 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 1N5366BE3/TR8 datasheet, 1N5366BE3/TR8 pinout, 1N5366BE3/TR8 application, or 1N5366BE3/TR8 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), surge current rating (170 A), 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, with cathode indicated by a band and rated for steady-state dissipation of 5 W at 25 °C lead temperature. Its low dynamic impedance (14 Ω) ensures minimal voltage variation across 10–50% of maximum Zener current (IZM = 170 mA).
The 1N5366BE3/TR8 features moisture sensitivity level 1 per J-STD-020B, void-free UL94V-0 epoxy encapsulation, and is qualified for operation up to 150 °C junction temperature. It withstands 8.3 ms half-sine surge currents up to 170 A and exhibits <0.65 V voltage regulation (ΔVZ) between 10% and 50% IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% - stable regulation point at 30 mA test current, suitable for 36–43 V system references |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - requires ≥10 mm lead length from body for full rating |
| Dynamic Impedance (ZZ) | 14 Ω at IZT = 30 mA - limits output voltage drift under load transients |
| Max Reverse Current (IR) | 0.5 μA at VR = 29.7 V - ensures low leakage in high-impedance bias networks |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with discrete heat sinking on leads |
| Surge Current (IZSM) | 170 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 0.65 V - difference between VZ measured at 17 mA and 85 mA, defining regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy, cathode identified by color band. Leads are annealed matte-tin plated (RoHS-compliant, e3 suffix), solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied to cathode |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to unregulated input; delivers regulated 39 V to load when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance (B suffix) | Enables tighter regulation than ±10% or ±20% variants, reducing need for post-regulation trimming |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for standard SMT/reflow or hand-soldering |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Permits handling without special static controls in assembly environments |
| High surge current rating (170 A) | Provides robust transient suppression in industrial power rails without external TVS augmentation |
| Low thermal resistance (25 °C/W) | Allows direct lead-mounting to chassis or heatsink for sustained 5 W operation without PCB copper area penalties |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp in Telecom Line Cards |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated 48 V DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise 39 V reference to error amplifier input. Use Value: Maintains ±0.65 V regulation across 17–85 mA load range, enabling <1% output voltage drift over line/load variations. | Use Scenario: Protecting line interface ICs from lightning-induced surges on -48 V telecom distribution buses. IC Role / Device Role / Timing Role: Passive clamp limiting bus voltage to 39 V during 170 A/8.3 ms transients. Use Value: Absorbs 170 A surge without degradation, preserving downstream PHY and controller integrity. |
| Test Equipment Voltage Standard | Automotive ECU Sensor Bias Network |
Use Scenario: Generating calibrated 39 V reference in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Primary voltage standard in benchtop reference divider chains. Use Value: Delivers ±5% initial accuracy and <0.65 V ΔVZ over current, supporting 0.1% measurement traceability. | Use Scenario: Biasing high-impedance pressure sensor bridges in engine control units operating at 125 °C ambient. IC Role / Device Role / Timing Role: Temperature-stable Zener source for Wheatstone bridge excitation. Use Value: Operates continuously at 150 °C junction temperature with <100 ppm/°C typical VZ drift, ensuring sensor linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B (non-e3, non-TR8) | Same electrical specs but SnPb plating and bulk packaging; no RoHS compliance or tape-and-reel delivery | Suitable only for legacy non-RoHS production; lacks reel format for automated placement | Select 1N5366BE3/TR8 for new designs requiring RoHS compliance and SMT compatibility |
| MMSZ5255B-TP (Micro Commercial Components) | Surface-mount SOD-123 package, 500 mW rating, 39 V ±5%, 17 Ω ZZ; not axial-leaded or 5 W capable | Used in space-constrained consumer electronics; cannot replace 1N5366BE3/TR8 in high-power or through-hole applications | Choose MMSZ5255B-TP only for low-power, board-area-limited designs where 5 W dissipation is unnecessary |
Compared with 1N5366B and MMSZ5255B-TP, the 1N5366BE3/TR8 uniquely combines 5 W axial-leaded power handling, RoHS-compliant matte-tin leads, and tape-and-reel packaging-making it optimal for industrial power supply manufacturing requiring both thermal robustness and automated assembly support.
Availability
1N5366BE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line protection circuits, and automotive ECU bias networks requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5366BE3/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 1N53xxB series was designed specifically for high-stability, high-power Zener regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and long-term parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5366BE3/TR8?
The 1N5366BE3/TR8 has a Zener voltage tolerance of ±5%, denoted by the "B" suffix in its part number. This means its actual regulation voltage falls within 37.05 V to 40.95 V at 30 mA test current and 25 °C lead temperature, as confirmed in Microsemi's official 1N5333B–1N5388B datasheet Rev D.
Does the 1N5366BE3/TR8 require dry packing before use?
No, the 1N5366BE3/TR8 does not require dry packing. It carries moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and processed under standard factory conditions without baking or humidity-controlled packaging-verified in the "Mechanical and Packaging" section of the official datasheet.
What is the maximum surge current rating for the 1N5366BE3/TR8?
The 1N5366BE3/TR8 is rated for a maximum non-recurrent surge current (IZSM) of 170 A, defined as the peak of an 8.3 ms half-sine waveform. This value is specified in the Electrical Characteristics table on page 2 of the Microsemi 1N5333B–1N5388B datasheet and reflects its capability for transient overvoltage clamping.
Can the 1N5366BE3/TR8 be used in surface-mount applications?
No, the 1N5366BE3/TR8 is an axial-leaded T-18 (DO-204AL) package and is not suitable for surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5366B or SMBG5366B-distinct part numbers with different package dimensions, thermal performance, and mounting requirements than the 1N5366BE3/TR8.
What is the forward voltage specification for the 1N5366BE3/TR8?
The forward voltage (VF) of the 1N5366BE3/TR8 is specified as a maximum of 1.2 V at 1.0 A forward current, per the "Maximum Ratings" table in the official datasheet. This parameter applies only during forward conduction and is not relevant to its primary Zener regulation function in reverse bias.
1N5366BE3/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:
- ±5%
- 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
1N5366BE3/TR8 FAQ
1.How can I place an order for 1N5366BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366BE3/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 1N5366BE3/TR8 reliable?
The price and inventory of 1N5366BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5366BE3/TR8?
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1N5366BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366BE3/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 1N5366BE3/TR8?
For technical support, including 1N5366BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366BE3/TR8 requirements.
6.How does Aetrix verify that 1N5366BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5366BE3/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 1N5366BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5366BE3/TR8?
All 1N5366BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366BE3/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 1N5366BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5366BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5366BE3/TR8 Tags
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