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Microchip Technology 1N5368E3/TR13
- Part No.:
- 1N5368E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368E3/TR13.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,368
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Product details
Overview
1N5368E3/TR13 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 industrial power supplies.
For engineers reviewing the 1N5368E3/TR13 datasheet, 1N5368E3/TR13 pinout, 1N5368E3/TR13 application, or 1N5368E3/TR13 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 Zener diode regulates voltage by maintaining a stable reverse-bias breakdown at 47 V across a wide operating current range (25 mA IZT, up to 100 mA IZM). Its low dynamic impedance (25 Ω) ensures minimal voltage variation under load changes, while its 25 °C/W thermal resistance enables reliable 5 W operation with 3/8″ lead length heat sinking.
The device features cathode band polarity marking, UL94V-0 void-free epoxy encapsulation, and moisture sensitivity level 1-no dry pack required. It withstands 8.3 ms half-sine surge currents up to 210 A and exhibits <0.5 μA leakage at 35.8 V (90% of VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal, ±5% tolerance - defines precise clamping threshold for protection and reference circuits |
| Test Current (IZT) | 25 mA - standard bias point where VZ and ZZ are specified and calibrated |
| Dynamic Impedance (ZZ) | 25 Ω at 25 mA - determines output voltage stability under varying load current |
| Max Reverse Current (IR) | 0.5 μA at 35.8 V - ensures negligible leakage in high-impedance bias/reference networks |
| Power Dissipation | 5.0 W at TL = 25°C (3/8″ lead length) - sets thermal design requirement for PCB layout and heatsinking |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - defines transient overvoltage handling capability without failure |
| 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 DO-204AL), void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plated leads, cathode indicated by colored band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in reverse-biased regulator | Connected to circuit ground or lower potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / high-side connection in reverse-biased regulator | Banded end; connected to supply rail or protected node; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant construction | e3 suffix confirms lead-free matte-tin plating compliant with EU Directive 2011/65/EU |
| Low thermal resistance | 25 °C/W junction-to-lead enables 5 W operation with simple lead-length heatsinking |
| Tight voltage tolerance | ±5% (B-equivalent) supports stable reference generation without post-calibration |
| High surge current rating | 210 A peak (8.3 ms) provides robust transient suppression in industrial environments |
| Moisture insensitive packaging | IPC/JEDEC J-STD-020B Level 1 - no dry pack or baking required before assembly |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp in Telecom Line Cards |
|---|---|
Use Scenario: Provides stable 47 V reference for feedback loop in isolated DC-DC converters delivering 48 V output. IC Role / Device Role / Timing Role: Shunt voltage reference regulating error amplifier input via resistive divider. Use Value: 25 Ω dynamic impedance and 2.7 V ΔVZ ensure <±0.1% output voltage drift across 10–100% load range. | Use Scenario: Protects downstream PHY ICs from lightning-induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: Passive shunt clamp diverting transient energy to ground when line voltage exceeds 47 V. Use Value: 210 A surge rating and 0.5 μA leakage at 35.8 V enable fail-safe protection without standby power loss. |
| Programmable Voltage Monitor Threshold | Field-Replaceable Sensor Excitation Reference |
Use Scenario: Sets trip point for comparator-based undervoltage/overvoltage detection in battery management systems. IC Role / Device Role / Timing Role: Precision Zener node establishing fixed threshold voltage for comparator input. Use Value: ±5% tolerance and -65°C to +150°C operating range guarantee consistent trip points across automotive and industrial temperature extremes. | Use Scenario: Supplies stable excitation voltage to strain gauge bridges in industrial weigh scales requiring recalibration traceability. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference source for ratiometric sensor signal conditioning. Use Value: 25 Ω ZZ and 0.5 μA IR minimize loading error and self-heating drift in high-impedance bridge arms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B | Same 47 V, ±5%, 5 W rating; non-RoHS tin-lead plating; no e3 suffix | Not suitable for RoHS-compliant production; identical electrical performance | Select 1N5368B only if leaded solder process is used and RoHS exemption applies |
| MMSZ5276E | Surface-mount SOD-123 package; 47 V, ±5%, 500 mW - not power-equivalent | Only viable for low-power signal-level references; cannot replace 1N5368E3/TR13 in 5 W applications | Choose MMSZ5276E only for space-constrained PCBs where power dissipation ≤0.5 W is sufficient |
Compared with 1N5368B and MMSZ5276E, the 1N5368E3/TR13 uniquely combines RoHS compliance, 5 W power handling, axial-leaded through-hole mounting, and JEDEC-standardized T-18 package - making it the sole option for high-reliability, lead-free, through-hole Zener regulation at 47 V.
Availability
1N5368E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line card protection, and programmable voltage monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5368E3/TR13 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N53xx series targets ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge immunity, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5368E3/TR13?
The 1N5368E3/TR13 has a nominal Zener voltage of 47 V with ±5% tolerance, consistent with the B-suffix variant in the 1N5333B–1N5388B family. This tolerance is confirmed in the Electrical Characteristics table where "1N5368B" is listed with VZ = 47 V and "B" suffix denoting ±5%. The e3 suffix indicates RoHS compliance but does not alter voltage tolerance.
Does the 1N5368E3/TR13 require dry packing before PCB assembly?
No, the 1N5368E3/TR13 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, explicitly stated in the Features section. This means the device may be stored and assembled without baking or humidity-controlled packaging, simplifying manufacturing logistics.
What is the maximum steady-state power dissipation for the 1N5368E3/TR13 on a standard FR4 PCB?
When mounted on an FR4 PCB (1 oz Cu) with 4 mm² copper pads and 1 mm track width (25 mm length), the 1N5368E3/TR13 has a steady-state power rating of 1.47 W at TA = 25°C. This value is derived from its 85 °C/W junction-to-ambient thermal resistance and is documented in the Maximum Ratings section.
How is polarity marked on the 1N5368E3/TR13?
The cathode of the 1N5368E3/TR13 is marked by a visible colored band on the epoxy body. Per the Mechanical and Packaging section, the diode must be operated with the banded end positive relative to the opposite (anode) end - i.e., reverse-biased for Zener regulation. This marking is standardized across the 1N53xx series.
What surge current rating does the 1N5368E3/TR13 support?
The 1N5368E3/TR13 supports a maximum non-recurrent surge current (IZSM) of 210 A, defined as the peak of an 8.3 ms half-sine waveform. This rating is listed in the Electrical Characteristics table and reflects its capability to absorb transient energy without degradation in industrial surge environments.
1N5368E3/TR13 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/TR13 FAQ
1.How can I place an order for 1N5368E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368E3/TR13 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/TR13 reliable?
The price and inventory of 1N5368E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5368E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368E3/TR13 transactions.
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4.How is shipping managed for 1N5368E3/TR13?
1N5368E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368E3/TR13 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/TR13?
For technical support, including 1N5368E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368E3/TR13 requirements.
6.How does Aetrix verify that 1N5368E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5368E3/TR13 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/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5368E3/TR13?
All 1N5368E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368E3/TR13, 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/TR13 part is unused and in its original packaging.
Return procedure for 1N5368E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368E3/TR13 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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