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Microchip Technology 1N5368BE3/TR8
- Part No.:
- 1N5368BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368BE3/TR8.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,072
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Product details
Overview
1N5368BE3/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 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 1N5368BE3/TR8 datasheet, 1N5368BE3/TR8 pinout, 1N5368BE3/TR8 application, or 1N5368BE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (210 A), low voltage regulation drift (2.7 V ΔVZ), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across wide operating current (25 mA IZT to 210 mA IZM) and temperature ranges. Its low 25 °C/W junction-to-lead thermal resistance enables high-power operation with minimal heatsinking when leads are trimmed to 10 mm.
Designed for DC voltage stabilization, it exhibits 2.7 V voltage regulation (ΔVZ) between 10% and 50% of IZM, 25 Ω dynamic impedance (ZZ) at IZT = 25 mA, and 0.5 μA maximum reverse leakage at VR = 35.8 V - confirming tight regulation performance under nominal bias conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% - defines precise clamping threshold for overvoltage protection circuits |
| Test Current (IZT) | 25 mA - standardized bias point for measuring VZ and dynamic impedance |
| Dynamic Impedance (ZZ) | 25 Ω max at IZT - ensures minimal output voltage variation under load transients |
| Max Zener Current (IZM) | 210 mA - maximum continuous DC current before thermal runaway with proper heatsinking |
| Thermal Resistance | 25 °C/W junction-to-lead - allows 5 W dissipation with only 125 °C rise above lead temperature |
| Voltage Regulation (ΔVZ) | 2.7 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 210 A peak (8.3 ms half-sine) - withstands transient overloads without failure |
| Reverse Leakage (IR) | 0.5 μA max at VR = 35.8 V - confirms low standby power loss in high-impedance bias networks |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; connected to voltage source input; maintains 47 V relative to anode during conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures industry-standard mechanical and electrical interchangeability across manufacturers |
| ±5% voltage tolerance (B suffix) | Supports stable regulation without post-production trimming in cost-sensitive industrial designs |
| RoHS-compliant e3 suffix | Meets global environmental compliance requirements without lead-free solder compatibility issues |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to assembly, reducing manufacturing overhead |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling in standard production environments without special static control measures |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in 48 V DC-DC converter secondary side. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 47 V threshold for error amplifier comparison. Use Value: Maintains ±0.5% output voltage accuracy over –40 °C to +85 °C ambient due to low ΔVZ and stable VZ temperature coefficient. | Use Scenario: Clamping transient spikes on 48 V battery bus in telecom rectifier systems. IC Role / Device Role / Timing Role: Transient voltage suppressor diverting surge energy to ground during lightning-induced surges. Use Value: Withstands 210 A non-repetitive surge (8.3 ms) without degradation, protecting downstream MOSFETs and controllers. |
| Programmable Voltage Reference | Current Source Bias Network |
Use Scenario: Generating precision bias voltage for op-amp input stages in analog sensor signal conditioning. IC Role / Device Role / Timing Role: Stable 47 V reference feeding resistive divider to produce 2.5 V or 5 V sub-rails. Use Value: Delivers <0.1% long-term drift due to low dynamic impedance and tight ±5% initial tolerance. | Use Scenario: Setting constant current in LED driver constant-current sink configuration. IC Role / Device Role / Timing Role: Zener-based current reference establishing ISET = VZ/RSET for linear LED regulation. Use Value: Enables 1% current accuracy with 1% RSET tolerance, leveraging 47 V stability and low ZZ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368BRLG | Same 47 V ±5%, but in bulk packaging (no tape/reel); identical electrical specs and T-18 package | No TR8 tape-and-reel format - unsuitable for automated pick-and-place | Select 1N5368BE3/TR8 for SMT line compatibility; choose 1N5368BRLG for manual prototyping or low-volume hand assembly |
| MMSZ5265B-TP | Surface-mount SOD-123 package; 47 V ±5%, but lower 500 mW power rating and 100 Ω ZZ | Not suitable for 5 W continuous dissipation; limited to low-power bias/reference roles | Choose MMSZ5265B-TP only where board space constraints prohibit axial leads and power demand is ≤0.5 W |
Compared with 1N5368BRLG and MMSZ5265B-TP, the 1N5368BE3/TR8 uniquely combines 5 W power handling, tape-and-reel automation support, and axial-leaded through-hole mounting - making it optimal for industrial power supply reference and protection where thermal robustness and assembly scalability are required.
Availability
1N5368BE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, and analog sensor conditioning requiring stable component supply, full RoHS compliance, and JEDEC-standard axial-leaded Zener performance.
Supply support for 1N5368BE3/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 5 W voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge immunity, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5368BE3/TR8?
The 1N5368BE3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 47 V regulation voltage falls within 44.65 V to 49.35 V at 25 °C with 25 mA test current. The e3 suffix confirms RoHS compliance, and TR8 denotes tape-and-reel packaging for automated assembly. This tolerance supports stable reference generation without calibration in industrial-grade power designs.
What is the maximum continuous Zener current for the 1N5368BE3/TR8?
The 1N5368BE3/TR8 supports a maximum continuous Zener current (IZM) of 210 mA when operated with adequate heatsinking - specifically at TL < 25 °C with 10 mm lead length from the body. This rating assumes 5 W power dissipation capability and corresponds to the high-end voltage tolerance (49.35 V). Derating applies above 25 °C per the published power derating curve in the Microsemi datasheet.
Does the 1N5368BE3/TR8 require dry-pack moisture protection before PCB assembly?
No, the 1N5368BE3/TR8 does not require dry-pack moisture protection. It carries IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, meaning it can be stored and assembled indefinitely at standard factory conditions (≤30 °C/60% RH) without baking. This eliminates pre-reflow bake cycles and reduces manufacturing complexity - a key advantage for high-volume industrial production using the 1N5368BE3/TR8.
What is the surge current rating of the 1N5368BE3/TR8 and how is it defined?
The 1N5368BE3/TR8 has a peak non-repetitive surge current (IZSM) rating of 210 A, defined as the maximum amplitude of a single 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without failure - critical for overvoltage protection in telecom and industrial power buses. The surge capability is enabled by its 5 W thermal mass and low thermal resistance, distinguishing it from lower-power Zeners like the MMSZ5265B-TP.
How is polarity marked on the 1N5368BE3/TR8 and what is its correct biasing configuration?
The 1N5368BE3/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to operate in Zener breakdown mode. In circuit implementation, the cathode connects to the voltage rail being regulated or protected, while the anode connects to ground or the return path. Reverse connection will forward-bias the device, producing ~1.2 V drop instead of 47 V regulation.
1N5368BE3/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:
- ±5%
- 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
1N5368BE3/TR8 FAQ
1.How can I place an order for 1N5368BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368BE3/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 1N5368BE3/TR8 reliable?
The price and inventory of 1N5368BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368BE3/TR8 is usually 5 days.
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1N5368BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368BE3/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 1N5368BE3/TR8?
For technical support, including 1N5368BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368BE3/TR8 requirements.
6.How does Aetrix verify that 1N5368BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5368BE3/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 1N5368BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5368BE3/TR8?
All 1N5368BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368BE3/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 1N5368BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5368BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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