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Microchip Technology 1N5366CE3/TR12
- Part No.:
- 1N5366CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366CE3/TR12.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,111
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Product details
Overview
1N5366CE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 39 V, ±2% tolerance (C suffix), 30 mA test current, 14 Ω dynamic impedance at IZT, and maximum reverse leakage of 0.5 μA at 29.7 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5366CE3/TR12 datasheet, 1N5366CE3/TR12 pinout, 1N5366CE3/TR12 application, or 1N5366CE3/TR12 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. Its Zener voltage is specified at 39 V ±2% under 30 mA DC test current at 25 °C lead temperature, with dynamic impedance measured at 1 kHz using 10% RMS AC modulation superimposed on IZT.
Thermal performance is defined relative to lead temperature (TL) - not ambient - with 5.0 W steady-state dissipation rated at TL < 25 °C (3/8″ lead length from body). Junction-to-lead thermal resistance is 25 °C/W; junction-to-ambient is 85 °C/W on FR4 with specified copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±2% - precise regulation point for feedback networks requiring tight voltage stability |
| Test Current (IZT) | 30 mA - standardized bias condition for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 14 Ω at IZT - low incremental resistance ensures minimal output voltage shift under load variation |
| Max Reverse Leakage (IR) | 0.5 μA at 29.7 V - enables low-power standby operation without significant quiescent current loss |
| Max Regulator Current (IZM) | 170 mA - maximum continuous DC current before exceeding 5 W power limit at TL = 25 °C |
| Surge Current (IZSM) | 170 A (8.3 ms half-sine) - withstands transient overvoltage events such as load dump or ESD coupling |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to lower-potential side of regulated circuit; forward voltage ≤1.2 V @ 1.0 A |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential side; defines 39 V reference when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in analog power supplies |
| Moisture sensitivity Level 1 | No dry pack required prior to PCB assembly - reduces handling cost and process complexity |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manufacturing and field service |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating and lead-free construction |
| Tape-and-reel packaging (TR12) | Supports automated SMT placement via EIA-296 standard carrier tape, 12 mm width |
Applications
| Switching Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Precision voltage reference element in secondary-side error amplifier loop. Use Value: ±2% VZ tolerance ensures output accuracy within ±3% across line/load/temperature, reducing need for post-production calibration. | Use Scenario: Protects downstream ICs from transient overvoltage on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Shunt clamping device triggered during surge events exceeding 29.7 V. Use Value: 170 A surge rating and 3.1 V ΔVZ ensure stable clamping threshold under repeated 8.3 ms transients without parameter drift. |
| Programmable Voltage Reference | DC-DC Converter Trim Network |
Use Scenario: Provides stable reference for DAC-based adjustable LDO controllers in test equipment. IC Role / Device Role / Timing Role: Primary Zener reference in series-connected trim network with precision resistors. Use Value: Low 14 Ω ZZ minimizes interaction with upstream resistor divider, preserving setpoint accuracy across temperature. | Use Scenario: Sets output voltage of fixed-output buck controller via external feedback divider. IC Role / Device Role / Timing Role: Replaces standard 1% resistor in upper leg of feedback divider to improve long-term stability. Use Value: 0.5 μA leakage at 29.7 V prevents measurable current injection into feedback node, avoiding output voltage error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B | Same 39 V nominal VZ, but ±5% tolerance (B suffix) vs. ±2% (C suffix); otherwise identical electrical specs and package | Acceptable where tighter regulation not required; lower cost in non-critical references | Select 1N5366B if system-level voltage accuracy budget allows ±5% VZ variation |
| MMSZ5265ET1G | Surface-mount SOD-123 package; 39 V ±5%; 500 mW rating; 100 Ω ZZ; 100 nA IR @ 29.7 V | Suitable only for low-power, space-constrained designs; cannot replace 1N5366CE3/TR12 in 5 W thermal environments | Choose MMSZ5265ET1G only for board area-limited applications with <100 mA load current |
Compared with 1N5366B and MMSZ5265ET1G, the 1N5366CE3/TR12 delivers superior voltage accuracy and thermal robustness for high-current, high-reliability applications - its ±2% tolerance and 5 W power handling enable stable regulation where alternatives would require derating or parallel devices.
Availability
1N5366CE3/TR12 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage clamp circuits, and programmable voltage reference designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1N5366CE3/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 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems - emphasizing wide temperature range (–65 °C to +150 °C), high surge survivability, and moisture-insensitive packaging.
FAQ
What is the Zener voltage tolerance of the 1N5366CE3/TR12?
The 1N5366CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 39 V regulation point falls within 38.22 V to 39.78 V at 30 mA test current and 25 °C lead temperature. This tighter tolerance supports precision feedback and reference applications where ±5% variants like 1N5366B would introduce excessive error.
Does the 1N5366CE3/TR12 require dry packing before PCB assembly?
No, the 1N5366CE3/TR12 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it can be stored indefinitely at ambient conditions without desiccant or dry cabinet. This eliminates moisture-related popcorning risk during reflow and simplifies inventory handling compared to higher-MSL components.
What is the maximum continuous current rating for the 1N5366CE3/TR12?
The 1N5366CE3/TR12 has a maximum continuous Zener current (IZM) of 170 mA when operated at a lead temperature (TL) below 25 °C with 3/8″ lead length from the body. At higher TL, power must be derated linearly per Figure 1 in the datasheet - for example, at TL = 75 °C, maximum IZM drops to approximately 85 mA to maintain 5 W thermal limit.
Can the 1N5366CE3/TR12 be used in surface-mount designs?
No, the 1N5366CE3/TR12 is an axial-leaded through-hole device in T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5366B (SMB package, 5 W) or SMBG5366B (SMBG package), both with same 39 V ±5% rating. The "TR12" suffix refers to tape-and-reel packaging for automated insertion, not SMT compatibility.
What is the surge current capability of the 1N5366CE3/TR12?
The 1N5366CE3/TR12 supports a peak non-recurrent surge current (IZSM) of 170 A, defined as the maximum amplitude of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without degradation - critical for protecting downstream circuitry from load dump, inductive kickback, or lightning-induced surges in automotive and industrial power systems.
1N5366CE3/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:
- ±2%
- 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
1N5366CE3/TR12 FAQ
1.How can I place an order for 1N5366CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366CE3/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 1N5366CE3/TR12 reliable?
The price and inventory of 1N5366CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5366CE3/TR12?
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1N5366CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366CE3/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 1N5366CE3/TR12?
For technical support, including 1N5366CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366CE3/TR12 requirements.
6.How does Aetrix verify that 1N5366CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5366CE3/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 1N5366CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5366CE3/TR12?
All 1N5366CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366CE3/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 1N5366CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5366CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5366CE3/TR12 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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