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Microchip Technology 1N5369AE3/TR12
- Part No.:
- 1N5369AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369AE3/TR12.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,205
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Product details
Overview
1N5369AE3/TR12 from Microsemi is a 51 V, ±10% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and precision reference applications requiring stable breakdown under high surge stress. It delivers 25 mA test current, 27 Ω dynamic impedance at 25 °C, and supports 38.8 mA maximum regulator current with adequate heat sinking.
For engineers reviewing the 1N5369AE3/TR12 datasheet, 1N5369AE3/TR12 pinout, 1N5369AE3/TR12 application, or 1N5369AE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±10%), thermal resistance (25 °C/W junction-to-lead), surge current rating (230 A), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its specified Zener voltage (VZ = 51 V) with minimal voltage variation across its rated current range (10–50% of IZM). Its low dynamic impedance (27 Ω) and tight voltage regulation (ΔVZ = 2.5 V) ensure stable reference performance under varying load conditions.
Designed for axial-lead mounting on FR4 PCBs or chassis with 3/8″ lead length, it features 25 °C/W junction-to-lead thermal resistance and withstands 260 °C soldering for 10 s. The cathode band indicates polarity, and operation requires the banded end to be positive relative to the anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±10% - defines precise clamping threshold for overvoltage protection and reference stability |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - sets maximum continuous DC power handling with proper heat sinking |
| Test Current (IZT) | 25 mA - standard operating point for measuring VZ and ZZ per JEDEC |
| Dynamic Impedance (ZZ) | 27 Ω at IZT - determines voltage deviation under load transients; lower value improves regulation fidelity |
| Max Regulator Current (IZM) | 38.8 mA - peak DC current before exceeding 5 W at VZ upper limit (56.1 V) |
| Surge Current (IZSM) | 230 A (8.3 ms half-sine) - enables robust transient suppression without failure |
| Voltage Regulation (ΔVZ) | 2.5 V - difference between VZ measured at 10% and 50% of IZM, quantifying knee sharpness |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case per JEDEC DO-201AD; void-free UL94V-0 epoxy body; 0.7 g weight; cathode indicated by colored band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias current entry terminal | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Reverse-bias current exit terminal | Banded end; connected to regulated voltage node or input rail; must be more positive than anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, electrical test methods, and reliability benchmarks across global supply chain |
| Moisture sensitivity Level 1 | Eliminates dry pack requirement and floor life constraints-ready for immediate reflow or hand-soldering |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during assembly |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with lead-free matte-tin plating and halogen-free epoxy encapsulation |
| High surge current capability | Withstands 230 A non-repetitive surges-critical for industrial power supply input stage protection |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Used in TL431-based optocoupler feedback networks to regulate +12 V output in isolated AC/DC adapters. IC Role / Device Role / Timing Role: Provides precise 51 V reference to set error amplifier trip point, enabling tight output voltage control within ±1%. Use Value: Maintains regulation accuracy despite line/load variations due to low ΔVZ (2.5 V) and stable ZZ (27 Ω). | Use Scenario: Placed across 48 V DC bus in telecom rectifier modules to prevent damage during lightning-induced transients. IC Role / Device Role / Timing Role: Acts as passive shunt clamp, diverting excess energy to ground when bus exceeds 51 V ±10%. Use Value: Survives 230 A surge events without degradation, ensuring long-term reliability in harsh environments. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Paired with precision resistors in 4–20 mA transmitter front-ends to generate stable excitation for RTD bridges. IC Role / Device Role / Timing Role: Serves as primary voltage reference source for analog signal conditioning circuitry. Use Value: Delivers ±10% initial tolerance and <2.5 V regulation drift over full current range-enabling 0.1% system accuracy. | Use Scenario: Supplies regulated bias to piezoresistive pressure sensors in hydraulic control valves operating at ambient –40 °C to +85 °C. IC Role / Device Role / Timing Role: Functions as temperature-stable excitation source independent of supply rail fluctuations. Use Value: Operates continuously from –65 °C to +150 °C with minimal VZ drift, supporting wide industrial temperature compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369B | Same 51 V nominal voltage but ±5% tolerance (vs. ±10% for 1N5369AE3/TR12); otherwise identical electrical specs and package | Suitable where tighter initial voltage accuracy is required, such as in calibration equipment or high-precision references | Select 1N5369B when ±5% tolerance is mandatory; retain same layout and thermal design |
| MMBZ5255BLT1G | Surface-mount SOT-23 package; 50 V ±5%; 0.225 W power rating-orders of magnitude lower than 5 W | Applicable only in low-power signal-level regulation or portable electronics where space and power are constrained | Choose MMBZ5255BLT1G only for PCB area-limited designs with <10 mA operating current; not a functional replacement for 5 W loads |
Compared with 1N5369B and MMBZ5255BLT1G, the 1N5369AE3/TR12 uniquely balances high-power dissipation (5 W), axial-lead serviceability, and RoHS compliance-making it optimal for industrial power supplies where thermal robustness and repairability matter.
Availability
1N5369AE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply across extended production lifecycles.
Supply support for 1N5369AE3/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 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in mission-critical power systems-emphasizing surge resilience, wide temperature operation, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5369AE3/TR12?
The 1N5369AE3/TR12 has a Zener voltage tolerance of ±10%, as indicated by the "A" suffix in its part number. This means its actual breakdown voltage falls between 45.9 V and 56.1 V at 25 °C with 25 mA test current. The tolerance is confirmed in the manufacturer's Electrical Characteristics table and applies across the full operating temperature range of –65 °C to +150 °C.
Does the 1N5369AE3/TR12 require dry packing before PCB assembly?
No, the 1N5369AE3/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 humidity-controlled packaging. This simplifies inventory handling and eliminates floor-life tracking prior to reflow or hand-soldering.
What is the maximum steady-state power dissipation for the 1N5369AE3/TR12 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5369AE3/TR12 has a steady-state power dissipation limit of 1.47 W at 25 °C ambient. This derated value reflects its higher junction-to-ambient thermal resistance (85 °C/W) compared to chassis-mounted operation (25 °C/W junction-to-lead).
Can the 1N5369AE3/TR12 be used in place of the 1N5369B?
Yes, the 1N5369AE3/TR12 can be used in place of the 1N5369B in applications tolerant of ±10% Zener voltage variation instead of ±5%. Both share identical package (T-18), pinout, thermal characteristics, and surge ratings. However, the 1N5369AE3/TR12's wider tolerance may affect regulation accuracy in precision feedback loops where tighter initial voltage matching is critical.
Is the 1N5369AE3/TR12 RoHS compliant?
Yes, the 1N5369AE3/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its part number. It uses RoHS-compliant annealed matte-tin plating on leads and halogen-free UL94V-0 epoxy encapsulation, meeting EU Directive 2011/65/EU requirements without exemptions.
1N5369AE3/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):
- 51 V
- Tolerance:
- ±10%
- 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
1N5369AE3/TR12 FAQ
1.How can I place an order for 1N5369AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369AE3/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 1N5369AE3/TR12 reliable?
The price and inventory of 1N5369AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5369AE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369AE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369AE3/TR12?
1N5369AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369AE3/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 1N5369AE3/TR12?
For technical support, including 1N5369AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369AE3/TR12 requirements.
6.How does Aetrix verify that 1N5369AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5369AE3/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 1N5369AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5369AE3/TR12?
All 1N5369AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369AE3/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 1N5369AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5369AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369AE3/TR12 Tags
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