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Microchip Technology 1N5369B/TR12
- Part No.:
- 1N5369B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369B/TR12.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,679
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Product details
Overview
1N5369B/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 51 V, ±5% tolerance (B suffix), 25 Ω dynamic impedance at 25 mA test current, and maximum reverse current of 0.5 μA at 38.8 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5369B/TR12 datasheet, 1N5369B/TR12 pinout, 1N5369B/TR12 application, or 1N5369B/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (230 A), voltage regulation (ΔVZ = 0.90 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output across wide current (1–230 mA) and temperature (–65 °C to +150 °C) ranges. Its low 25 °C/W junction-to-lead thermal resistance enables high steady-state power dissipation (5 W at TL < 25 °C) when mounted with 10 mm lead length from body.
The 1N5369B/TR12 exhibits minimal voltage drift: ΔVZ = 0.90 V between 10% and 50% of IZM, and knee impedance ZZK = 27 Ω at 1 mA. Its cathode band polarity marking and UL94V-0 void-free epoxy case support reliable manual and automated assembly in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% - precise regulation point for 48 V system references and clamp thresholds |
| Test Current (IZT) | 25 mA - standard bias point for measuring VZ and dynamic impedance under stable conditions |
| Dynamic Impedance (ZZ) | 27 Ω at 25 mA - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 0.5 μA at 38.8 V - ultra-low leakage preserves accuracy in high-impedance bias networks |
| Max Regulator Current (IZM) | 230 mA - peak DC current capability when adequately heat-sunk (TL ≤ 25 °C) |
| Surge Current (IZSM) | 230 A (8.3 ms half-sine) - robust transient suppression for lightning/surge protection circuits |
| Voltage Regulation (ΔVZ) | 0.90 V - difference between VZ measured at 10% and 50% of IZM, indicating tight regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by color band; leads are tin-lead or RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to lower-potential node; forms regulated reference with cathode at higher potential |
| Cathode | Regulated output terminal | Banded end; held at stable 51 V above anode when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard axial package with guaranteed 5 W steady-state power at TL < 25 °C |
| ±5% voltage tolerance (B suffix) | Tighter regulation than ±10% (A) or ±20% (no suffix), enabling accurate reference without trimming |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies handling and eliminates bake-out before assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands electrostatic discharge without parameter shift or failure |
| e3 RoHS-compliant option | Matte-tin plating meets EU RoHS Directive 2011/65/EU - suitable for lead-free reflow and environmental compliance |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Providing stable 51 V reference for feedback loop in 48 V telecom rectifier modules. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing precise error amplifier setpoint. Use Value: ±5% tolerance and 0.90 V ΔVZ ensure consistent regulation across line/load/temperature variations. |
Use Scenario: Clamping transient surges on 48 V DC bus in railway signaling equipment. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy during 230 A 8.3 ms surges. Use Value: 230 A surge rating and low 25 °C/W thermal resistance prevent thermal runaway during repeated events. |
| Programmable Voltage Monitor | High-Temperature Sensor Bias Network |
Use Scenario: Setting trip threshold for undervoltage lockout in industrial motor drives operating up to +125 °C. IC Role / Device Role / Timing Role: Precision Zener defining comparator reference in analog monitoring circuit. Use Value: Stable 51 V regulation over –65 °C to +150 °C ensures reliable trip point across full military temperature range. |
Use Scenario: Biasing RTD or thermistor bridges in oil & gas downhole instrumentation exposed to +150 °C ambient. IC Role / Device Role / Timing Role: Low-leakage (0.5 μA at 38.8 V) reference source minimizing measurement error. Use Value: Ultra-low IR prevents current injection into high-impedance sensor nodes, preserving accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369B (bulk) | Same electrical specs and T-18 package; differs only in packaging - bulk vs. tape-and-reel (TR12) | No functional difference; TR12 enables automated pick-and-place, while bulk supports manual/hand-solder prototyping | Select 1N5369B/TR12 for SMT production; choose bulk 1N5369B for lab evaluation or low-volume hand assembly. |
| MMBZ5255B (SOT-23) | Same 51 V ±5%, but 0.35 W rating, 300 Ω ZZ, and surface-mount SOT-23 package | Not suitable for 5 W power dissipation; limited to low-current bias/reference roles in space-constrained PCBs | Choose MMBZ5255B only where board area is critical and power < 350 mW; retain 1N5369B/TR12 for >1 W regulation or surge handling. |
Compared with 1N5369B (bulk) and MMBZ5255B, the 1N5369B/TR12 delivers full 5 W power handling and 230 A surge capability in JEDEC-standard axial form - essential for industrial power and protection designs where thermal mass and reliability outweigh footprint constraints.
Availability
1N5369B/TR12 is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage clamp circuit, and programmable voltage monitor applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5369B/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 5 W voltage regulation in harsh-environment power systems - emphasizing thermal robustness, surge immunity, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5369B/TR12?
The 1N5369B/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This means its nominal 51 V regulation point falls within 48.45 V to 53.55 V at 25 °C with 25 mA test current. The tolerance is tighter than the ±10% "A" variant and supports precision reference applications without external trimming.
Does the 1N5369B/TR12 require dry packing before PCB assembly?
No, the 1N5369B/TR12 has Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb significant moisture during normal handling and requires no dry pack or baking prior to reflow soldering. This simplifies manufacturing logistics and reduces risk of popcorning during assembly.
What is the maximum surge current rating for the 1N5369B/TR12?
The 1N5369B/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 230 A, defined as the peak of an 8.3 ms half-sine waveform. This rating reflects its ability to safely clamp high-energy transients in industrial power rails, provided adequate PCB copper area and thermal relief are implemented.
How does the thermal resistance of the 1N5369B/TR12 affect its power dissipation?
The 1N5369B/TR12 has a junction-to-lead thermal resistance of 25 °C/W at 10 mm lead length from body. At 25 °C lead temperature, it sustains full 5 W dissipation; derating begins above that point. When mounted on FR4 with specified copper pads, junction-to-ambient resistance rises to 85 °C/W, limiting usable power to ~1.47 W at 25 °C ambient.
Is the 1N5369B/TR12 RoHS compliant?
Yes, the 1N5369B/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation. Its leads feature RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026, meeting EU Directive 2011/65/EU requirements for lead-free assembly compatibility.
1N5369B/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:
- ±5%
- 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
1N5369B/TR12 FAQ
1.How can I place an order for 1N5369B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369B/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 1N5369B/TR12 reliable?
The price and inventory of 1N5369B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5369B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369B/TR12?
1N5369B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369B/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 1N5369B/TR12?
For technical support, including 1N5369B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369B/TR12 requirements.
6.How does Aetrix verify that 1N5369B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5369B/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 1N5369B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5369B/TR12?
All 1N5369B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369B/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 1N5369B/TR12 part is unused and in its original packaging.
Return procedure for 1N5369B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369B/TR12 Tags
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