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Microchip Technology 1N5368/TR8
- Part No.:
- 1N5368/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368/TR8.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,953
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Product details
Overview
1N5368/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 47 V, ±5% tolerance (B suffix), 25 Ω dynamic impedance at 25 mA test current, and maximum reverse current of 0.5 µA at 35.8 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 1N5368/TR8 datasheet, 1N5368/TR8 pinout, 1N5368/TR8 application, or 1N5368/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (210 A), voltage regulation (ΔVZ = 2.7 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown, maintaining stable 47 V output across a wide current range (25 mA IZT to 210 A non-repetitive surge). Its low dynamic impedance (25 Ω) and tight ±5% tolerance ensure minimal voltage drift under load variation and temperature cycling.
The 1N5368/TR8 uses a void-free thermosetting epoxy T-18 package with tin-lead or RoHS-compliant matte-tin plating, rated for 260 °C soldering (10 s), and features cathode band polarity marking. Thermal performance is specified at 3/8″ lead length (25 °C/W) or FR4 board mounting (85 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% - precise regulation point for 45–49 V reference applications |
| Test Current (IZT) | 25 mA - standard 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 @ 35.8 V - confirms sharp knee and low leakage below regulation threshold |
| Power Dissipation (PD) | 5.0 W @ TL = 25 °C - requires heat sinking above ambient for sustained operation |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - supports transient overvoltage clamping in protection circuits |
| Voltage Regulation (ΔVZ) | 2.7 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC TO-204-AD), void-free thermosetting epoxy body meeting UL94V-0, cathode indicated by colored band.
| 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 / regulated output node | Banded end; connected to supply rail requiring stabilized 47 V reference or clamping |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard axial package with traceable electrical specs and mechanical dimensions |
| ±5% voltage tolerance (B suffix) | Enables tighter system-level voltage margin control vs. ±10% or ±20% variants |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling in manufacturing without special static controls |
| e3 RoHS-compliant marking | Meets EU RoHS Directive 2011/65/EU with lead-free terminations |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stable 47 V reference in linear regulator feedback networks or ADC reference buffers for factory automation controllers. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference providing fixed bias point independent of input ripple. Use Value: Low ΔVZ (2.7 V) and 25 Ω ZZ minimize reference error across 25–100 mA load range. | Use Scenario: Clamping transient spikes on 48 V DC bus lines in telecom rectifiers or motor drive DC links. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy when bus exceeds 47 V, triggered by 210 A 8.3 ms surge rating. Use Value: Fast response and high IZSM prevent downstream component damage without crowbar circuitry. |
| Programmable Logic Controller Input Conditioning | Test Equipment Voltage Calibration Standard |
Use Scenario: Input signal conditioning for 48 V-rated digital I/O modules, ensuring logic thresholds remain within spec despite supply variance. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing input divider network against rail fluctuations. Use Value: ±5% VZ tolerance and <0.5 µA IR at 35.8 V guarantee consistent threshold setting across temperature. | Use Scenario: Secondary voltage standard in benchtop multimeters or calibration labs verifying 45–49 V measurement accuracy. IC Role / Device Role / Timing Role: Traceable reference source with documented Zener characteristics per JEDEC 1N5368B spec. Use Value: Low thermal resistance (25 °C/W) enables stable readings during extended calibration cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B | No TR8 tape-and-reel packaging; bulk or ammo pack only | Suitable for manual prototyping or low-volume hand-soldered builds | Select 1N5368/TR8 for automated SMT placement; choose 1N5368B for lab evaluation or small-batch assembly |
| MMBZ5265B (ON Semiconductor) | Surface-mount SOD-123 package, 0.5 W rating, same 47 V ±5% | Designed for space-constrained PCBs where axial leads are impractical | Use MMBZ5265B only when board real estate or reflow compatibility is critical; 1N5368/TR8 preferred for high-power dissipation needs |
Compared with 1N5368B and MMBZ5265B, the 1N5368/TR8 uniquely combines JEDEC-standard axial form factor, 5 W power handling, tape-and-reel automation support, and verified 210 A surge capability-making it optimal for industrial power and protection designs requiring robust through-hole mounting.
Availability
1N5368/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, PLC input conditioning, and test equipment calibration requiring stable component supply and long-term manufacturability.
Supply support for 1N5368/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standard mechanical interoperability.
FAQ
What is the Zener voltage tolerance of the 1N5368/TR8?
The 1N5368/TR8 has a nominal Zener voltage of 47 V with ±5% tolerance, as indicated by the "B" suffix in its part number per Microsemi's documentation. This means the actual regulation voltage falls between 44.65 V and 49.35 V at 25 °C with 25 mA test current. The tolerance is confirmed in the Electrical Characteristics table on page 1 of the official datasheet.
Does the 1N5368/TR8 require dry packing before PCB assembly?
No, the 1N5368/TR8 does not require dry packing before PCB assembly because it carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 rating. This classification confirms the device is not hygroscopic and can be stored and processed under standard ambient conditions without baking, simplifying manufacturing logistics.
What is the maximum surge current rating for the 1N5368/TR8?
The 1N5368/TR8 has a maximum non-repetitive surge current (IZSM) rating of 210 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated under standardized test conditions and supports reliable transient voltage clamping in industrial power bus protection applications.
How is polarity marked on the 1N5368/TR8?
The 1N5368/TR8 uses a cathode band marking - a single colored band near one end of the axial package - to indicate the cathode terminal. During Zener operation, this banded end must be held at a higher potential than the anode (unbanded) end. Polarity is explicitly defined in the Mechanical and Packaging section of the Microsemi datasheet.
Is the 1N5368/TR8 RoHS compliant?
Yes, the 1N5368/TR8 is RoHS compliant, as confirmed by the "e3" suffix in its full ordering designation (1N5368B/TR8-e3 per Microsemi documentation). It features RoHS-compliant annealed matte-tin plating on leads and meets EU Directive 2011/65/EU requirements for restricted substances.
1N5368/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:
- ±20%
- 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
1N5368/TR8 FAQ
1.How can I place an order for 1N5368/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368/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 1N5368/TR8 reliable?
The price and inventory of 1N5368/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5368/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5368/TR8?
1N5368/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368/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 1N5368/TR8?
For technical support, including 1N5368/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368/TR8 requirements.
6.How does Aetrix verify that 1N5368/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5368/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 1N5368/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5368/TR8?
All 1N5368/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368/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 1N5368/TR8 part is unused and in its original packaging.
Return procedure for 1N5368/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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