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Microchip Technology 1N5368E3/TR8
- Part No.:
- 1N5368E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368E3/TR8.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,727
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Product details
Overview
1N5368E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 47 V, ±5% tolerance (B-suffix equivalent), 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 power supply feedback loops.
For engineers reviewing the 1N5368E3/TR8 datasheet, 1N5368E3/TR8 pinout, 1N5368E3/TR8 application, or 1N5368E3/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 matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its Zener voltage is specified at 25 °C with 25 mA test current (IZT), and its dynamic impedance (ZZ = 25 Ω) reflects low sensitivity to current variation across its operating range.
The 1N5368E3/TR8 exhibits minimal voltage drift versus temperature due to its low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length) and stable regulation (ΔVZ = 2.7 V between 10% and 50% of IZM). It withstands non-repetitive 8.3 ms half-sine surge currents up to 210 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% - precise regulation point for feedback networks and clamp thresholds |
| Test Current (IZT) | 25 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 25 Ω - low AC resistance ensures stable output under varying load conditions |
| Max Reverse Current (IR) | 0.5 μA at 35.8 V - tight leakage enables low-power standby operation |
| Power Dissipation | 5.0 W at TL < 25 °C - requires adequate heatsinking for sustained high-current operation |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - robust transient suppression capability |
| 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 (void-free UL94V-0 epoxy), cathode indicated by band; leads are RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference node | Connected to circuit ground or lower-potential rail during regulation |
| Cathode | Zener voltage output node | Banded end; supplies regulated 47 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - safe for standard handling without special ESD controls |
| RoHS Compliant (e3 suffix) | Lead-free matte-tin plating meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 1 |
| High Surge Withstand | Rated for 210 A non-repetitive 8.3 ms half-sine surges - suitable for input-stage transient suppression |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold and defining regulation setpoint. Use Value: 47 V breakdown enables direct sensing of 48 V telecom rails; ±5% tolerance ensures ±2.35 V setpoint accuracy under thermal stress. | Use Scenario: Protects downstream DC-DC converters from input overvoltage events on 36–42 V industrial bus lines. IC Role / Device Role / Timing Role: Shunt clamping device that conducts excess current when bus exceeds 47 V. Use Value: 210 A surge rating absorbs 8.3 ms transients without failure; 25 Ω ZZ minimizes clamping voltage overshoot. |
| Programmable Voltage Reference | Field-Serviceable Calibration Standard |
Use Scenario: Provides stable 47 V reference for analog-to-digital converter (ADC) full-scale calibration in test equipment. IC Role / Device Role / Timing Role: Precision voltage source referenced against traceable metrology standards. Use Value: ΔVZ = 2.7 V ensures ≤5.7% regulation deviation across operating current range - sufficient for 12-bit system accuracy. | Use Scenario: Embedded in modular power modules for field recalibration of voltage monitoring circuits after component aging. IC Role / Device Role / Timing Role: Replaceable reference element enabling post-deployment accuracy restoration. Use Value: Axial T-18 package allows manual replacement with standard soldering tools; RoHS-compliant plating supports rework compatibility. |
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 | Same 47 V ±5%, but SnPb plating instead of RoHS-compliant matte tin (e3) | Not suitable for new RoHS-compliant designs; acceptable for legacy repair or exempt applications | Select 1N5368B only if leaded solder process is mandated and environmental compliance is waived |
| SMBJ5368B | Surface-mount SMB package; identical electrical specs but 85 °C/W junction-to-ambient thermal resistance vs. 25 °C/W for axial lead | Requires PCB layout change; unsuitable for through-hole prototyping or high-power dissipation without large copper areas | Choose SMBJ5368B only when board space constraints justify SMT conversion and thermal management is redesigned |
Compared with 1N5368B and SMBJ5368B, the 1N5368E3/TR8 uniquely combines RoHS compliance, axial-leaded serviceability, and low junction-to-lead thermal resistance-making it optimal for industrial power supplies requiring field-replaceable, thermally robust, and environmentally compliant voltage references.
Availability
1N5368E3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5368E3/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 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and long-term parametric consistency under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5368E3/TR8?
The 1N5368E3/TR8 has a nominal Zener voltage of 47 V with ±5% tolerance, consistent with the B-suffix designation in the 1N53xxB family. This tolerance is verified at 25 °C with 25 mA test current and applies across the full operating temperature range of –65 °C to +150 °C. The e3 suffix indicates RoHS compliance but does not alter voltage tolerance specifications.
How does the thermal resistance of the 1N5368E3/TR8 affect its power handling?
The 1N5368E3/TR8 has a junction-to-lead thermal resistance of 25 °C/W at 10 mm lead length, enabling full 5 W dissipation when leads are adequately heat-sunk. Without external heatsinking, its steady-state power drops to 1.47 W on FR4 PCBs. This means the 1N5368E3/TR8 must be mounted with short, thick leads or attached to metal chassis to sustain high-current regulation without exceeding 150 °C junction temperature.
Is the 1N5368E3/TR8 suitable for surge protection applications?
Yes, the 1N5368E3/TR8 is rated for 210 A non-repetitive surge current (8.3 ms half-sine), making it suitable for transient voltage suppression in DC power inputs. Its low dynamic impedance (25 Ω) and tight voltage regulation (ΔVZ = 2.7 V) ensure predictable clamping behavior. However, it is not intended for repeated surge events-designers should verify duty cycle and energy absorption limits per application requirements.
What does the "TR8" suffix indicate in 1N5368E3/TR8?
The "TR8" suffix in 1N5368E3/TR8 denotes tape-and-reel packaging per EIA-296 standard, with 8 mm tape width and component orientation optimized for automated pick-and-place assembly. The base part remains 1N5368E3 (RoHS-compliant 47 V Zener), and TR8 adds logistics and handling specifications-not electrical or thermal changes.
Can the 1N5368E3/TR8 replace older 1N5368B parts in existing designs?
Yes, the 1N5368E3/TR8 is a direct functional and mechanical replacement for 1N5368B, sharing identical Zener voltage, tolerance, power rating, and T-18 axial package dimensions. The only difference is RoHS-compliant matte-tin plating (e3) versus legacy SnPb plating. No PCB or schematic changes are needed, but reflow profile adjustments may be required to accommodate lead-free solder compatibility.
1N5368E3/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
1N5368E3/TR8 FAQ
1.How can I place an order for 1N5368E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368E3/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 1N5368E3/TR8 reliable?
The price and inventory of 1N5368E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5368E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5368E3/TR8?
1N5368E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368E3/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 1N5368E3/TR8?
For technical support, including 1N5368E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368E3/TR8 requirements.
6.How does Aetrix verify that 1N5368E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5368E3/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 1N5368E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5368E3/TR8?
All 1N5368E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368E3/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 1N5368E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5368E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368E3/TR8 Tags
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