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Microchip Technology 1N5368C/TR8
- Part No.:
- 1N5368C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368C/TR8.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,042
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Product details
Overview
1N5368C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 47 V, ±2% tolerance (C suffix), 25 Ω maximum dynamic impedance at 25 mA test current, and 210 mA maximum Zener current when adequately heat-sunk. 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 1N5368C/TR8 datasheet, 1N5368C/TR8 pinout, 1N5368C/TR8 application, or 1N5368C/TR8 equivalent, this page provides verified electrical parameters, thermal derating behavior, JEDEC T-18 package details, RoHS-compliant plating, and validated alternative parts for voltage regulation design.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown. Its regulation stability relies on low dynamic impedance (25 Ω @ 25 mA) and tight ±2% voltage tolerance, enabling accurate clamping across varying load currents. The 25 °C/W junction-to-lead thermal resistance supports stable operation up to 5 W when leads are mounted with ≥10 mm length from body.
It exhibits minimal voltage drift versus current (ΔVZ = 2.7 V between 10% and 50% IZM) and withstands 8.3 ms non-repetitive surge currents up to 210 A. Reverse leakage is limited to 0.5 μA at 35.8 V, ensuring low standby power loss in bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±2% - precise regulation point for feedback loops and reference generation |
| Test Current (IZT) | 25 mA - standard bias point for measuring VZ and ZZ |
| Dynamic Impedance (ZZ) | 25 Ω max @ IZT - low AC impedance ensures stable output under dynamic load changes |
| Max Zener Current (IZM) | 210 mA @ TL = 25 °C - defines safe DC operating limit with proper heat sinking |
| Power Dissipation | 5.0 W @ TL < 25 °C - rated steady-state power handling capability |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal modeling for lead-length-dependent derating |
| Reverse Leakage (IR) | 0.5 μA max @ 35.8 V - ensures negligible current draw in standby clamp circuits |
Pinout & Package
Package: JEDEC T-18 axial-leaded plastic case (void-free thermosetting epoxy, UL94V-0 rated), cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Reverse-bias breakdown terminal / high-voltage side in regulation | Banded end; connected to input rail or unregulated supply to clamp voltage at 47 V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop accuracy without external trimming in regulated power supplies |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT-compatible handling |
| 8.3 ms surge current rating: 210 A | Provides robust transient overvoltage suppression in industrial line-input stages |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected assembly environments |
| RoHS compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Industrial Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Precision voltage reference for TL431-like error amplifier biasing. Use Value: ±2% VZ tolerance directly improves output regulation accuracy to ±1.5% over line/load/temperature. | Use Scenario: Protecting downstream DC-DC controllers from input surges in 48 V telecom systems. IC Role / Device Role / Timing Role: Shunt clamping element placed across primary-side bulk capacitor. Use Value: 210 A surge rating absorbs 8.3 ms transients without degradation, extending system MTBF. |
| Programmable Reference Source | Temperature-Stable Bias Network |
Use Scenario: Generating stable reference voltages for analog sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Primary reference node in ratiometric ADC front-end designs. Use Value: Low ΔVZ (2.7 V) ensures reference stability across 21–105 mA operating range. | Use Scenario: Providing temperature-compensated bias current for linear regulator pass transistors. IC Role / Device Role / Timing Role: Zener-based current source with matched thermal coefficient. Use Value: 25 °C/W RθJL allows predictable thermal tracking when mounted adjacent to pass devices. |
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/TR8 | ±5% tolerance (B suffix), same VZ = 47 V, identical package and IZM | Lower cost where ±5% regulation accuracy suffices; higher production yield | Select when absolute voltage precision is secondary to BOM cost reduction |
| MMSZ5265ET1G | Surface-mount SOD-123 package, 500 mW rating, ±5%, VZ = 47 V | Not suitable for 5 W dissipation; requires PCB layout change and thermal redesign | Choose only for space-constrained, low-power applications where board area is critical |
Compared with 1N5368B/TR8, the 1N5368C/TR8 delivers tighter voltage control essential for closed-loop regulation, while MMSZ5265ET1G offers footprint savings at the expense of power handling and thermal robustness.
Availability
1N5368C/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection circuits, and programmable reference designs requiring stable component supply and long-term manufacturability.
Supply support for 1N5368C/TR8 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 designed for ruggedized, high-power voltage regulation in harsh-environment power systems where thermal stability, surge immunity, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N5368C/TR8?
The 1N5368C/TR8 has a Zener voltage tolerance of ±2%, indicated by the "C" suffix in its part number. This means its measured breakdown voltage at 25 mA test current falls within 46.06 V to 47.94 V at 25 °C. This tighter tolerance supports higher-accuracy regulation compared to ±5% (B suffix) or ±10% (A suffix) variants of the same 47 V rating.
Can the 1N5368C/TR8 be used without a heatsink?
The 1N5368C/TR8 can operate without an external heatsink only at significantly reduced power levels. Its 5 W rating assumes a junction-to-lead thermal resistance of 25 °C/W with ≥10 mm lead length from the body. At ambient temperatures above 25 °C or with shorter leads, derating is required per Figure 1 in the datasheet to avoid exceeding the 150 °C maximum junction temperature.
What does the "TR8" suffix mean in 1N5368C/TR8?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, with 8 mm tape width and component orientation optimized for automated pick-and-place assembly. This format supports high-volume manufacturing and ensures consistent feeding reliability in SMT lines, while maintaining full compliance with the base 1N5368C electrical and thermal specifications.
Is the 1N5368C/TR8 RoHS compliant?
Yes, the 1N5368C/TR8 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation. Its leads are plated with annealed matte tin per MIL-STD-750 Method 2026, and the void-free epoxy case meets UL94V-0 flammability requirements-fully satisfying EU Directive 2011/65/EU and related global environmental regulations.
How does the 1N5368C/TR8 compare to the 1N4760A in terms of performance?
The 1N5368C/TR8 offers superior thermal performance (25 °C/W vs. ~50 °C/W for 1N4760A), higher surge current rating (210 A vs. ~100 A), and tighter ±2% tolerance vs. ±5% for the 1N4760A. Both regulate at 47 V, but the 1N5368C/TR8 is rated for 5 W continuous dissipation with appropriate lead mounting, whereas the 1N4760A is a 1 W device-making them non-interchangeable without thermal redesign.
1N5368C/TR8 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/TR8 FAQ
1.How can I place an order for 1N5368C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368C/TR8 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/TR8 reliable?
The price and inventory of 1N5368C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5368C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5368C/TR8?
1N5368C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368C/TR8 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/TR8?
For technical support, including 1N5368C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368C/TR8 requirements.
6.How does Aetrix verify that 1N5368C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5368C/TR8 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/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5368C/TR8?
All 1N5368C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368C/TR8, 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/TR8 part is unused and in its original packaging.
Return procedure for 1N5368C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368C/TR8 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ4682T1G
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MM5Z5V1ST1G
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