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Microchip Technology 1N5368C/TR12
- Part No.:
- 1N5368C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368C/TR12.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,424
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Product details
Overview
1N5368C/TR12 from Microsemi is a 5 W, 47 V ±2% tolerance axial-leaded silicon Zener diode designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers stable regulation across –65°C to +150°C, supports 25 mA test current (IZT), exhibits 25 Ω dynamic impedance (ZZ), and maintains ≤2.7 V voltage regulation (ΔVZ) at 50% and 10% of IZM.
For engineers reviewing the 1N5368C/TR12 datasheet, 1N5368C/TR12 pinout, 1N5368C/TR12 application, or 1N5368C/TR12 equivalent, key selection criteria include its ±2% VZ tolerance (C suffix), 5 W steady-state power rating at TL < 25°C with 3/8" lead length, 100 Ω maximum dynamic knee impedance (ZZK) at 1.0 mA, and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This Zener operates in reverse breakdown mode with cathode indicated by a band; it requires the banded end to be held positive relative to the anode. Its regulation performance is specified at TL = 25°C ±10°C, with VZ measured 40 ±10 ms after DC current application.
Thermal resistance is 25 °C/W junction-to-lead (3/8" lead length) and 85 °C/W junction-to-ambient on FR4 (1 oz Cu, 4 mm² pad, 1 mm × 25 mm trace). Surge current rating is 210 A (8.3 ms half-sine), and forward voltage is ≤1.2 V at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±2% - precise reference voltage for feedback and clamping applications |
| Power Dissipation (Pd) | 5.0 W at TL < 25°C - requires minimum 3/8" lead length for full rating |
| Test Current (IZT) | 25 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 25 Ω - low AC impedance ensures minimal voltage shift under load transients |
| Voltage Regulation (ΔVZ) | ≤2.7 V - difference between VZ at 10% and 50% of IZM, indicating regulation linearity |
| Max Reverse Current (IR) | 0.5 μA at VR = 35.8 V - leakage threshold confirming sharp knee behavior near rated VZ |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode identified by color band; leads plated with RoHS-compliant matte tin, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference node | Connected to system ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal | Banded end; connected to regulated output or voltage sense point; must be more positive than anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter output regulation in feedback networks without external trimming |
| Moisture sensitivity Level 1 (IPC/JEDEC J-STD-020B) | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling during manual or automated assembly without special ESD controls |
| High surge current capability (210 A) | Provides inherent transient overvoltage protection without additional TVS devices |
| RoHS compliant (e3 suffix) | Meets global environmental compliance requirements for industrial and commercial designs |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt reference element providing stable 47 V reference to TL431 or similar error amplifier. Use Value: ±2% VZ tolerance ensures ±1–2% output accuracy without calibration; 25 Ω ZZ minimizes load-induced drift under dynamic line/load steps. |
Use Scenario: Protects 48 V DC input rails in PLC backplanes against lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt clamp activated above 47 V to divert excess energy to ground. Use Value: 210 A surge rating absorbs 8.3 ms transients per IEEE C62.41; 2.7 V ΔVZ ensures predictable clamping window across operating current range. |
| Programmable Reference Generator | Automotive Battery Monitor Threshold |
|
Use Scenario: Serves as adjustable reference in DAC-based voltage setpoint circuits for lab power supplies. IC Role / Device Role / Timing Role: Precision Zener reference feeding op-amp summing junction to generate programmable output targets. Use Value: Low ZZK (100 Ω @ 1 mA) ensures stable reference even at low bias currents; wide temp range (–65°C to +150°C) supports unregulated environments. |
Use Scenario: Detects overcharge condition (>47 V) in 42 V mild-hybrid vehicle battery management systems. IC Role / Device Role / Timing Role: Analog threshold detector interfaced to comparator input for fault signaling. Use Value: Tight 47 V ±2% tolerance enables accurate SOC estimation; 150°C max operating temperature suits under-hood placement near battery terminals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B/TR12 | ±5% VZ tolerance vs. ±2% for 1N5368C/TR12; otherwise identical electrical and mechanical specs | Acceptable where ±5% output tolerance is sufficient; lower cost in high-volume production | Select when budget constraints outweigh need for tight regulation; verify system-level accuracy margin |
| MMSZ5268ET1G | Surface-mount SOD-123 package (2.7 × 1.6 mm); 47 V ±5%, 500 mW rating; not drop-in compatible | Used in space-constrained PCBs where axial leads are impractical; unsuitable for 5 W thermal loads | Choose only for low-power signal-level referencing; requires redesign for thermal management and layout |
Compared with 1N5368B/TR12 and MMSZ5268ET1G, the 1N5368C/TR12 uniquely combines ±2% tolerance, 5 W power handling, and axial-leaded through-hole mounting-making it optimal for industrial power supplies requiring both precision and robustness without SMT rework.
Availability
1N5368C/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage clamps, and programmable reference generators requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5368C/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 discrete components for aerospace, defense, and industrial markets.
The 1N53xxB/C series was engineered for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal stability, surge resilience, and extended temperature operation beyond commercial-grade alternatives.
FAQ
What is the Zener voltage tolerance of the 1N5368C/TR12?
The 1N5368C/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi's documentation. This means its nominal 47 V breakdown voltage is guaranteed between 46.06 V and 47.94 V at 25°C with 25 mA test current. The tighter tolerance enables higher accuracy in feedback and reference applications compared to ±5% (B suffix) or ±10% (A suffix) variants.
Can the 1N5368C/TR12 be used in surface-mount designs?
No-the 1N5368C/TR12 is an axial-leaded T-18 package device intended for through-hole mounting. It lacks surface-mount compatibility. For SMT equivalents, Microsemi offers the SMBJ5368B series, while other manufacturers provide SOD-123 or DO-214AC packages-but none match the 1N5368C/TR12's 5 W rating and ±2% tolerance in SMT form.
What is the maximum surge current rating for the 1N5368C/TR12?
The 1N5368C/TR12 has a maximum non-recurrent surge current (IZSM) rating of 210 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient overvoltage events without degradation, making it suitable for primary-side clamping in industrial power inputs where lightning or switching surges occur.
How does thermal resistance affect the 1N5368C/TR12's power rating?
The 1N5368C/TR12's 5 W rating applies only when lead temperature (TL) is maintained below 25°C, typically achieved with ≥3/8" (10 mm) lead length from the body. Its junction-to-lead thermal resistance is 25 °C/W; exceeding TL = 25°C derates power linearly-e.g., at TL = 75°C, max power drops to 2.5 W. Board-level thermal design must account for this.
Is the 1N5368C/TR12 RoHS compliant?
Yes-the "e3" designation in Microsemi's official documentation confirms the 1N5368C/TR12 is RoHS compliant, with annealed matte-tin plating on leads meeting EU Directive 2011/65/EU. The "TR12" suffix indicates tape-and-reel packaging per EIA-296, but RoHS compliance is inherent to the base device construction, not packaging.
1N5368C/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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 33.8 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
1N5368C/TR12 FAQ
1.How can I place an order for 1N5368C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368C/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 1N5368C/TR12 reliable?
The price and inventory of 1N5368C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5368C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5368C/TR12?
1N5368C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368C/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 1N5368C/TR12?
For technical support, including 1N5368C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368C/TR12 requirements.
6.How does Aetrix verify that 1N5368C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5368C/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 1N5368C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5368C/TR12?
All 1N5368C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368C/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 1N5368C/TR12 part is unused and in its original packaging.
Return procedure for 1N5368C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368C/TR12 Tags
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