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Microchip Technology 1N5369CE3/TR8
- Part No.:
- 1N5369CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369CE3/TR8.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,019
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Product details
Overview
1N5369CE3/TR8 from Microsemi is a 51 V, ±2% tolerance, 5 W axial-leaded silicon Zener diode operating from -65°C to +150°C with 25 °C/W junction-to-lead thermal resistance and 27 Ω dynamic impedance at 25 mA test current. It regulates voltage in power supply reference and overvoltage protection circuits requiring stable breakdown under varying load and temperature.
For engineers reviewing the 1N5369CE3/TR8 datasheet, 1N5369CE3/TR8 pinout, 1N5369CE3/TR8 application, or 1N5369CE3/TR8 equivalent, this page delivers verified electrical specs, JEDEC T-18 package details, thermal derating guidance, and validated alternative parts for industrial power management design.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a nominal regulation voltage of 51 V at 25 mA (IZT), exhibiting 27 Ω dynamic impedance (ZZ) and 0.9 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. Its 5 W steady-state power rating is valid at 25°C lead temperature (TL), derating linearly above that point per Figure 1.
The device features RoHS-compliant matte-tin plating, UL94V-0 epoxy encapsulation, cathode band polarity marking, and moisture sensitivity level 1-no dry pack required. It withstands 8.3 ms non-repetitive surge currents up to 230 A and maintains <0.5 μA reverse leakage at 40.8 V (VR = 0.8 × VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±2% at 25 mA - precise reference for feedback loops in regulated DC supplies |
| Power Dissipation (Pd) | 5.0 W at TL = 25°C - requires ≥3/8″ lead length heat sinking for full rating |
| Dynamic Impedance (ZZ) | 27 Ω at IZT = 25 mA - low AC impedance ensures stable regulation under dynamic load changes |
| Max Reverse Current (IR) | 0.5 μA at VR = 40.8 V - minimal leakage preserves efficiency in high-impedance bias networks |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal modeling when mounted with 10 mm lead length |
| Surge Current (IZSM) | 230 A (8.3 ms half-sine) - robust transient suppression capability without failure |
| Voltage Regulation (ΔVZ) | 0.9 V - difference between VZ measured at 10% and 50% of max current (IZM) |
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 RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Reverse-bias breakdown terminal / regulated output node | Banded end; connected to unregulated input rail to deliver stable 51 V reference |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop accuracy vs. ±5% (B) or ±10% (A) variants |
| JEDEC-registered T-18 package | Standardized mechanical interface compatible with automated axial insertion and wave soldering |
| Moisture Sensitivity Level 1 | No dry pack or baking required before PCB assembly-reduces manufacturing overhead |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU and China RoHS II without lead or hazardous substances |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Zener reference element setting precise 51 V threshold for TL431-like shunt regulator circuits. Use Value: ±2% tolerance ensures output stays within ±1% of target under line/load transients and temperature drift. | Use Scenario: Protecting downstream 48 V telecom equipment inputs from surges exceeding 60 V. IC Role / Device Role / Timing Role: Passive clamping device diverting excess energy to ground when input exceeds 51 V. Use Value: 230 A surge rating absorbs IEC 61000-4-5 Level 4 transients without degradation. |
| Industrial Sensor Excitation | Programmable Reference Voltage Source |
Use Scenario: Providing stable excitation voltage to precision 4–20 mA current-loop pressure transducers. IC Role / Device Role / Timing Role: Low-drift voltage reference replacing higher-cost IC references where 51 V bias is required. Use Value: 0.9 V ΔVZ ensures <2% regulation error across 2.5–12.5 mA operating range. | Use Scenario: Generating programmable thresholds in analog comparator circuits for battery monitoring. IC Role / Device Role / Timing Role: Adjustable reference node set via resistor divider from 51 V Zener output. Use Value: 27 Ω ZZ minimizes loading error when driving high-impedance comparator inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369B | Same 51 V nominal, but ±5% tolerance (B suffix) and 25 Ω ZZ at 25 mA | Acceptable where tighter regulation not required; lower cost in high-volume production | Select when system-level calibration compensates for wider VZ spread |
| SMBJ5369CE3 | Surface-mount SMB package, same 51 V ±2%, 5 W rating, 27 Ω ZZ, but 110 °C/W RθJA on FR4 | Used in space-constrained designs; requires thermal pad layout for power handling | Choose for automated SMT lines where board area is premium and lead-free reflow is standard |
Compared with 1N5369B and SMBJ5369CE3, the 1N5369CE3/TR8 offers superior thermal performance in through-hole applications due to its 25 °C/W junction-to-lead resistance, while maintaining the tightest voltage tolerance in the axial-leaded 5 W family-making it optimal for precision analog feedback paths where lead temperature can be controlled.
Availability
1N5369CE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection, sensor excitation circuits, and programmable reference designs requiring stable component supply with traceable RoHS compliance and long-term obsolescence management.
Supply support for 1N5369CE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed as a rugged, JEDEC-standardized 5 W Zener platform offering wide voltage selection (3.3–200 V), multiple tolerance grades, and military-grade screening options for mission-critical power regulation.
FAQ
What is the Zener voltage tolerance of the 1N5369CE3/TR8?
The 1N5369CE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its breakdown voltage is guaranteed between 49.98 V and 52.02 V at 25 mA test current and 25°C lead temperature, enabling high-accuracy voltage references in feedback networks where tighter regulation than ±5% (B suffix) is required.
What does the "e3" and "TR8" suffix indicate in 1N5369CE3/TR8?
The "e3" suffix confirms RoHS compliance with lead-free matte-tin plating per EU Directive 2011/65/EU. The "TR8" indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape, 1000 units per reel-optimized for automated pick-and-place assembly. Both suffixes are integral to the official Microsemi orderable part number 1N5369CE3/TR8.
Can the 1N5369CE3/TR8 be used in surface-mount designs?
No-the 1N5369CE3/TR8 is an axial-leaded T-18 package and is not suitable for surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5369CE3 in SMB package. Using 1N5369CE3/TR8 in SMT processes would require manual placement and through-hole reflow or wave soldering, violating its mechanical and thermal design intent.
What is the maximum surge current rating for the 1N5369CE3/TR8?
The 1N5369CE3/TR8 is rated for a maximum non-repetitive surge current (IZSM) of 230 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient overvoltage events-such as lightning-induced surges or inductive switching spikes-without parametric shift or catastrophic failure, provided the device is properly heatsunk.
How does thermal derating affect the 1N5369CE3/TR8's power handling?
The 1N5369CE3/TR8 delivers full 5.0 W only at TL = 25°C (measured 3/8″ from body). Above 25°C, power must be linearly derated at 20 mW/°C-e.g., at TL = 75°C, max power drops to 4.0 W. Derating is based on junction-to-lead thermal resistance (25 °C/W); ambient-mounted FR4 board operation yields only 1.47 W at TA = 25°C due to higher RθJA.
1N5369CE3/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):
- 51 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 27 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 36.7 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
1N5369CE3/TR8 FAQ
1.How can I place an order for 1N5369CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369CE3/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 1N5369CE3/TR8 reliable?
The price and inventory of 1N5369CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369CE3/TR8 is usually 5 days.
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Once your 1N5369CE3/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 1N5369CE3/TR8?
For technical support, including 1N5369CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369CE3/TR8 requirements.
6.How does Aetrix verify that 1N5369CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5369CE3/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 1N5369CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5369CE3/TR8?
All 1N5369CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369CE3/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 1N5369CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5369CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369CE3/TR8 Tags
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