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Microchip Technology 1N5369C/TR12
- Part No.:
- 1N5369C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369C/TR12.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,740
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Product details
Overview
1N5369C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 51 V, ±2% tolerance (C suffix), 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 industrial power supplies.
For engineers reviewing the 1N5369C/TR12 datasheet, 1N5369C/TR12 pinout, 1N5369C/TR12 application, or 1N5369C/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 = 0.9 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 variation (IZM = 25 mA at 51 V). Its low dynamic impedance (25 Ω) and tight ±2% voltage tolerance ensure minimal deviation under load shifts.
Designed for axial-lead through-hole mounting on FR4 PCBs with 1 oz copper, it delivers 5 W steady-state dissipation at TL < 25 °C (3/8″ lead length), derating linearly above that temperature. The cathode band identifies 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 ±2% - precise regulation point for feedback loops and reference circuits |
| Test Current (IZT) | 25 mA - standardized bias point for measuring VZ and ZZ |
| Dynamic Impedance (ZZ) | 25 Ω - low AC resistance ensures stable voltage under varying load currents |
| Max Reverse Current (IR) | 0.5 μA at 40.8 V - confirms sharp knee and low leakage below regulation threshold |
| Max Regulator Current (IZM) | 25 mA - maximum DC current at rated 5 W dissipation with adequate heat sinking |
| Surge Current (IZSM) | 230 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 0.9 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), 0.7 g weight, moisture sensitivity Level 1 (no dry pack required). Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener regulation | Accepts forward current up to 1.0 A (VF ≤ 1.2 V); grounded or tied to return path during regulation |
| Cathode | Current exit terminal in forward bias; higher-potential node in Zener regulation | Connected to regulated rail; band-marked end must be held positive relative to anode for reverse breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in analog sensing and feedback networks |
| 25 °C/W junction-to-lead thermal resistance | Supports full 5 W dissipation with simple 3/8″ lead-length heat sinking-no heatsink required for moderate duty cycles |
| RoHS-compliant matte-tin plating | Ensures solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow (260 °C/10 s) |
| Non-sensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions in assembly environments, reducing process overhead |
| Moisture classification Level 1 (IPC/JEDEC J-STD-020B) | Permits direct use from reel without baking, accelerating production throughput |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback reference in 48 V telecom rectifier modules operating at –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fixed 51 V reference to error amplifier input. Use Value: ±2% tolerance and 0.9 V ΔVZ maintain output accuracy within ±0.5% over line/load transients. | Use Scenario: Protecting 48 V CAN bus transceivers from load-dump surges up to 80 V. IC Role / Device Role / Timing Role: Passive clamp limiting rail voltage to 51 V + diode drop during transient events. Use Value: 230 A surge rating absorbs 8.3 ms half-sine pulses without degradation, preserving downstream ICs. |
| Programmable Logic Controller (PLC) Input Conditioning | Test Equipment Reference Source |
Use Scenario: Scaling and protecting 0–10 V analog inputs in modular PLC backplanes exposed to field wiring noise. IC Role / Device Role / Timing Role: Precision shunt reference establishing upper limit for input voltage divider network. Use Value: Low 25 Ω ZZ minimizes loading error on high-impedance dividers, improving measurement fidelity. | Use Scenario: Providing stable 51 V calibration reference in portable multimeter front-end circuitry. IC Role / Device Role / Timing Role: Primary voltage standard traceable to factory calibration, operating at 25 mA IZT. Use Value: Tight ±2% tolerance and <0.5 μA leakage at 40.8 V ensure long-term drift <10 ppm/°C in battery-powered instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369B/TR12 | ±5% tolerance (B suffix), same VZ nominal, identical package and thermal specs | Lower cost where ±5% regulation accuracy suffices (e.g., non-critical biasing) | Select when budget constraints outweigh need for ±2% stability in feedback paths |
| MMSZ5255B-TP | Surface-mount SOD-123, 500 mW rating, 51 V ±5%, ZZ = 45 Ω at 20 mA | Used in space-constrained PCBs where axial leads are impractical; not suitable for 5 W continuous dissipation | Choose only for low-power signal-level referencing-not for power rail clamping or regulation |
Compared with 1N5369C/TR12, the 1N5369B/TR12 trades tighter tolerance for cost savings while retaining identical thermal and surge performance; MMSZ5255B-TP offers footprint reduction but sacrifices 90% of power handling and regulation precision.
Availability
1N5369C/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection clamps, and programmable logic controller (PLC) input conditioning requiring stable component supply and long-lifecycle support.
Supply support for 1N5369C/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/C series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5369C/TR12?
The 1N5369C/TR12 has a Zener voltage tolerance of ±2%, indicated by the "C" suffix per Microsemi's documentation. This means its actual regulation voltage falls between 49.98 V and 52.02 V at 25 °C when tested at 25 mA. This tight tolerance makes the 1N5369C/TR12 suitable for precision reference applications where ±5% devices like the 1N5369B/TR12 would introduce unacceptable error.
Can the 1N5369C/TR12 be used in surface-mount designs?
No, the 1N5369C/TR12 is an axial-leaded T-18 package intended for through-hole mounting. It is not compatible with SMT assembly processes. For surface-mount equivalents, Microsemi offers the SMBJ5369C or SMBG5369C in DO-214AA/DO-214AB packages-but those are distinct orderable parts, not drop-in replacements for the 1N5369C/TR12.
What is the maximum power dissipation of the 1N5369C/TR12 at 25 °C?
The 1N5369C/TR12 is rated for 5.0 W steady-state power dissipation at 25 °C lead temperature (TL), measured 3/8″ from the body. When mounted on a standard FR4 PCB (1 oz Cu, 4 mm² pads), its derated power drops to 1.47 W at 25 °C ambient (TA) due to higher junction-to-ambient thermal resistance (85 °C/W).
How does the 1N5369C/TR12 handle surge conditions?
The 1N5369C/TR12 is rated for a peak non-recurrent surge current (IZSM) of 230 A, defined as an 8.3 ms half-sine waveform. This capability enables reliable overvoltage clamping in automotive load-dump or industrial switching transients. Its robust construction and low thermal resistance allow it to absorb such energy without parametric shift or catastrophic failure when properly heatsunk.
Is the 1N5369C/TR12 RoHS compliant?
Yes, the 1N5369C/TR12 carries the "e3" suffix in its full manufacturer designation (1N5369C e3/TR12), confirming RoHS compliance. Its terminals feature annealed matte-tin plating per MIL-STD-750 Method 2026, supporting lead-free soldering at 260 °C for 10 seconds-fully compatible with modern environmental and manufacturing requirements.
1N5369C/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:
- ±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
1N5369C/TR12 FAQ
1.How can I place an order for 1N5369C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369C/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 1N5369C/TR12 reliable?
The price and inventory of 1N5369C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5369C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369C/TR12?
1N5369C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369C/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 1N5369C/TR12?
For technical support, including 1N5369C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369C/TR12 requirements.
6.How does Aetrix verify that 1N5369C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5369C/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 1N5369C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5369C/TR12?
All 1N5369C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369C/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 1N5369C/TR12 part is unused and in its original packaging.
Return procedure for 1N5369C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369C/TR12 Tags
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