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Microchip Technology 1N5366BE3/TR12
- Part No.:
- 1N5366BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366BE3/TR12.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,391
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Product details
Overview
1N5366BE3/TR12 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 maximum dynamic impedance at IZT. It operates from –65°C to +150°C and is RoHS-compliant (e3 suffix), commonly used for overvoltage protection and precision voltage reference in industrial power supplies.
For engineers reviewing the 1N5366BE3/TR12 datasheet, 1N5366BE3/TR12 pinout, 1N5366BE3/TR12 application, or 1N5366BE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, maximum surge current (170 A), thermal resistance (25 °C/W junction-to-lead), and compliance with MIL-PRF-19500 screening options when prefixed.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable 39 V output across a wide operating current range (10%–50% of IZM = 1.7–8.5 A). Its low dynamic impedance (14 Ω) and tight voltage regulation (ΔVZ = 3.1 V) ensure minimal drift under load variation.
Designed for axial-lead through-hole mounting with T-18 package, it features UL94V-0 epoxy encapsulation, tin-lead or matte-tin plating, and cathode band polarity marking. Thermal performance is specified at 3/8″ lead length (25 °C/W) or FR4 board mount (85 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% - defines regulated output level under nominal test conditions |
| Test Current (IZT) | 30 mA - dc current at which VZ is measured; sets baseline operating point |
| Max Dynamic Impedance (ZZ) | 14 Ω - indicates small-signal AC resistance; lower value improves regulation stability |
| Max Regulator Current (IZM) | 170 mA - maximum continuous dc current before thermal derating begins |
| Surge Current (IZSM) | 170 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity |
| Power Dissipation (PD) | 5.0 W at TL = 25°C - steady-state thermal limit with adequate heatsinking |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead thermal path efficiency; critical for PCB layout and heatsink design |
Pinout & Package
Package: T-18 axial-leaded plastic case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, cathode indicated by band, 0.7 g weight, leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to unregulated input rail; delivers regulated 39 V to load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, electrical behavior, and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Enables tighter system-level voltage margin control versus ±10% or ±20% variants |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU; uses annealed matte-tin plating instead of lead-based finishes |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints during assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protective packaging in manufacturing |
| High surge current rating (170 A) | Provides robust transient voltage suppression without external TVS devices in many applications |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing auxiliary bias rails in switch-mode power supplies for PLCs and motor drives. IC Role / Device Role / Timing Role: Primary voltage reference and shunt regulator for feedback loop error amplifiers. Use Value: Maintains 39 V ±5% across 10–170 mA load range, minimizing output ripple and improving closed-loop accuracy. | Use Scenario: Clamping induced transients on 48 V DC distribution buses in factory automation systems. IC Role / Device Role / Timing Role: Passive crowbar element that conducts during overvoltage events above 39 V. Use Value: Absorbs 170 A surge (8.3 ms) without failure, protecting downstream MOSFETs and controllers. |
| Programmable Logic Controller (PLC) Input Conditioning | Test Equipment Reference Source |
Use Scenario: Providing stable 39 V reference for analog input scaling and isolation amplifier biasing. IC Role / Device Role / Timing Role: Precision shunt reference in signal conditioning front-end stages. Use Value: Delivers <3.1 V regulation delta across current variation, enabling <0.1% full-scale measurement accuracy. | Use Scenario: Serving as calibration reference in bench multimeters and programmable DC sources. IC Role / Device Role / Timing Role: Stable, low-drift voltage standard traceable to primary Zener standards. Use Value: Low dynamic impedance (14 Ω) and tight tolerance reduce measurement uncertainty in high-impedance sensing paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B | No TR12 tape-and-reel packaging; bulk or ammo pack only; same electrical specs | Not suitable for automated SMT placement; requires manual or vibration-feed insertion | Select 1N5366B for prototyping or low-volume hand-soldered builds where reel format is unnecessary |
| MMBZ5267BS-7-F | Surface-mount SOD-123 package; 39 V ±5%; 200 mW max power; 100 mA IZM | Lower power handling and surge capability; intended for space-constrained, low-current biasing | Choose MMBZ5267BS-7-F only for compact PCB layouts with ≤200 mW dissipation and no surge exposure |
Compared with 1N5366B and MMBZ5267BS-7-F, the 1N5366BE3/TR12 uniquely combines 5 W power handling, axial-leaded reliability, tape-and-reel automation support, and MIL-grade screening compatibility-making it optimal for industrial power and protection designs requiring robustness and volume manufacturability.
Availability
1N5366BE3/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and PLC input conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5366BE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation and transient suppression in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and military-grade screening readiness.
FAQ
What is the Zener voltage tolerance of the 1N5366BE3/TR12?
The 1N5366BE3/TR12 has a nominal Zener voltage of 39 V with ±5% tolerance, as indicated by the "B" suffix in its part number. This means the actual measured VZ falls between 37.05 V and 40.95 V at 30 mA test current and 25°C lead temperature. The e3 suffix confirms RoHS compliance but does not affect voltage tolerance.
Can the 1N5366BE3/TR12 be used in surface-mount designs?
No, the 1N5366BE3/TR12 is an axial-leaded T-18 package device intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5366B or SMBG5366B in DO-214AA/DO-214AB packages. These share identical electrical specs but differ mechanically and thermally-do not substitute without verifying board layout and thermal design.
What is the maximum surge current rating for the 1N5366BE3/TR12?
The 1N5366BE3/TR12 is rated for a maximum non-repetitive surge current (IZSM) of 170 A, defined as the peak of an 8.3 ms half-sine waveform. This rating assumes proper lead length (3/8″ from body) and ambient conditions per the datasheet. Exceeding this value risks irreversible junction damage even if average power remains within limits.
Does the 1N5366BE3/TR12 require dry packing or moisture barrier bags?
No-the 1N5366BE3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it is not moisture-sensitive and does not require dry packing, baking, or floor-life controls prior to soldering. This simplifies inventory handling and eliminates reflow-related delamination risk.
How does thermal resistance impact the 1N5366BE3/TR12's power handling in PCB designs?
The 1N5366BE3/TR12 has RθJL = 25 °C/W (junction-to-lead) at 3/8″ lead length, but RθJA rises to 85 °C/W when mounted on FR4 with 4 mm² copper pads. Thus, at 25°C ambient, its usable power drops from 5.0 W to ~1.47 W unless additional copper area or heatsinking is applied-designers must verify junction temperature stays below 150°C under worst-case load.
1N5366BE3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N5366BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366BE3/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 1N5366BE3/TR12 reliable?
The price and inventory of 1N5366BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5366BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5366BE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5366BE3/TR12?
1N5366BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366BE3/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 1N5366BE3/TR12?
For technical support, including 1N5366BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366BE3/TR12 requirements.
6.How does Aetrix verify that 1N5366BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5366BE3/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 1N5366BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5366BE3/TR12?
All 1N5366BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366BE3/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 1N5366BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5366BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5366BE3/TR12 Tags
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