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Microchip Technology 1N5369E3/TR12
- Part No.:
- 1N5369E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369E3/TR12.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,178
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Product details
Overview
1N5369E3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 51 V, ±5% tolerance (B-suffix equivalent), 25 Ω dynamic impedance at 25 mA test current, and maximum reverse current of 0.5 μA at 40.8 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 1N5369E3/TR12 datasheet, 1N5369E3/TR12 pinout, 1N5369E3/TR12 application, or 1N5369E3/TR12 equivalent, key selection criteria include Zener voltage accuracy, 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 functions as a two-terminal voltage regulator operating in reverse breakdown. Its regulation stability relies on low dynamic impedance (27 Ω at IZT = 25 mA) and minimal voltage variation (ΔVZ = 2.5 V between 10% and 50% of IZM). The T-18 package enables axial mounting with cathode band polarity marking.
It delivers 5 W steady-state dissipation at 25 °C lead temperature (3/8″ from body), derating linearly above that point. Thermal resistance is specified as 25 °C/W junction-to-lead and 85 °C/W junction-to-ambient on FR4 with defined copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% - precise regulation point for feedback networks requiring stable reference under varying load |
| Test Current (IZT) | 25 mA - standardized bias point for measuring VZ and ZZ, enabling consistent comparator design |
| Dynamic Impedance (ZZ) | 27 Ω - low AC resistance ensures minimal output voltage shift during transient load changes |
| Max Reverse Current (IR) | 0.5 μA at 40.8 V - confirms sharp knee and low leakage below regulation threshold |
| Max Regulator Current (IZM) | 230 mA - maximum continuous DC current before thermal runaway when adequately heat sunk |
| Surge Current (IZSM) | 230 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 2.5 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-201AD, void-free thermosetting epoxy meeting UL94V-0, with cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS compliant, e3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; held at stable 51 V relative to anode during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures mechanical and electrical interchangeability across manufacturers' 1N53xxB series |
| Moisture sensitivity Level 1 | No dry pack required prior to PCB assembly-reduces handling cost and process steps |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manual or automated placement |
| RoHS-compliant plating (e3 suffix) | Meets global environmental compliance without sacrificing solderability or reliability |
| Tape-and-reel packaging (TR12 suffix) | Enables high-speed pick-and-place assembly with standard 12 mm carrier tape |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides stable 51 V reference in optocoupler-coupled secondary-side feedback loop of isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt voltage reference for TL431-like control circuits. Use Value: Maintains ±1% output regulation across line/load transients due to low ΔVZ and tight 5% VZ tolerance. | Use Scenario: Supplies excitation voltage to bridge-based pressure sensors in harsh-environment industrial transmitters. IC Role / Device Role / Timing Role: Stable shunt regulator establishing fixed bias point independent of supply ripple. Use Value: Enables <10 ppm/°C drift performance via low thermal resistance (25 °C/W) and wide operating range (–65 °C to +150 °C). |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Clamps induced surges on 48 V telecom distribution rails during lightning-induced transients. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 230 A (8.3 ms) surge energy without degradation. Use Value: Prevents downstream IC damage while maintaining system uptime-validated by 230 A IZSM rating and robust epoxy encapsulation. | Use Scenario: Sets trip point for comparator-based battery disconnect logic in 48 V EV auxiliary systems. IC Role / Device Role / Timing Role: Precision voltage threshold element defining 51 V cutoff to prevent overcharge. Use Value: Delivers repeatable activation within ±2.55 V (±5%) across temperature, supported by low ZZ (27 Ω) minimizing hysteresis error. |
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 VZ (51 V), ±5%, but non-RoHS tin-lead plating and bulk packaging | Not suitable for lead-free assembly; requires dry pack if stored >12 months | Select only for legacy reflow processes where RoHS exemption applies |
| SMBJ5369B | Surface-mount SMB package, identical electrical specs, same ±5% tolerance | Requires PCB redesign for SMT layout; no axial through-hole mounting option | Choose when board space constraints mandate SMT or automated assembly throughput demands |
Compared with 1N5369B and SMBJ5369B, the 1N5369E3/TR12 uniquely combines RoHS compliance, tape-and-reel readiness, and axial-leaded mechanical compatibility-making it optimal for new designs targeting IPC Class 3 reliability and J-STD-020 moisture handling.
Availability
1N5369E3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and programmable threshold detectors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5369E3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was engineered for ruggedized voltage regulation in mission-critical power systems-emphasizing thermal robustness, surge immunity, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5369E3/TR12?
The 1N5369E3/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B"-equivalent specification in the 1N53xxB family. This corresponds to a regulation range of 48.45 V to 53.55 V at 25 °C lead temperature. The e3 suffix denotes RoHS compliance but does not alter voltage tolerance. This tolerance is confirmed in the manufacturer's REV D datasheet table under "1N5369B" entry.
Does the 1N5369E3/TR12 require dry packing before PCB assembly?
No, the 1N5369E3/TR12 does not require dry packing. Its moisture sensitivity level is rated IPC/JEDEC J-STD-020B Level 1, meaning it can be stored indefinitely at ambient conditions without desiccant or dry cabinet. This is verified in the "Features" section of the Microsemi datasheet and eliminates baking steps prior to reflow soldering.
What is the maximum continuous current the 1N5369E3/TR12 can handle?
The 1N5369E3/TR12 supports a maximum continuous Zener current (IZM) of 230 mA when operated at 25 °C lead temperature with adequate heat sinking. At ambient temperature on FR4 (1 oz Cu, 4 mm² pads), its steady-state power drops to 1.47 W. These values are explicitly listed in the "Maximum Ratings" table of the official datasheet.
Can the 1N5369E3/TR12 be used in surface-mount designs?
No-the 1N5369E3/TR12 uses an axial-leaded T-18 package and is not compatible with surface-mount layouts. For SMT implementation, Microsemi offers the SMBJ5369B as a direct functional equivalent in SMB package. The 1N5369E3/TR12 requires through-hole mounting with 3/8″ lead length for thermal performance compliance.
What is the surge current rating of the 1N5369E3/TR12?
The 1N5369E3/TR12 has a peak non-recurrent surge current (IZSM) rating of 230 A for an 8.3 ms half-sine waveform. This value is specified in the "Electrical Characteristics" table and validates its use in transient overvoltage suppression applications such as telecom line protection and motor drive snubbing.
1N5369E3/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:
- ±20%
- 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
1N5369E3/TR12 FAQ
1.How can I place an order for 1N5369E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369E3/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 1N5369E3/TR12 reliable?
The price and inventory of 1N5369E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5369E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369E3/TR12?
1N5369E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369E3/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 1N5369E3/TR12?
For technical support, including 1N5369E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369E3/TR12 requirements.
6.How does Aetrix verify that 1N5369E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5369E3/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 1N5369E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5369E3/TR12?
All 1N5369E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369E3/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 1N5369E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5369E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369E3/TR12 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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