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Microchip Technology 1N5357CE3/TR8
- Part No.:
- 1N5357CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357CE3/TR8.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,807
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Product details
Overview
1N5357CE3/TR8 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with a nominal regulation voltage of 20 V, ±2% tolerance (C suffix), 65 mA test current (IZT), 3.0 Ω maximum dynamic impedance (ZZ), and 75 mA maximum regulator current (IZM). It operates across –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5357CE3/TR8 datasheet, 1N5357CE3/TR8 pinout, 1N5357CE3/TR8 application, or 1N5357CE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), voltage regulation (ΔVZ = 0.40 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown. Its regulation performance is defined at 20 V with tight ±2% tolerance, low dynamic impedance (≤3.0 Ω at 65 mA), and minimal voltage variation (ΔVZ = 0.40 V between 10% and 50% of IZM).
It features a void-free thermosetting epoxy T-18 package rated for 5.0 W at 25°C lead temperature, with thermal resistance of 25 °C/W junction-to-lead (3/8" lead length) and 85 °C/W junction-to-ambient on FR4. Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±2% - precise reference point for feedback networks requiring stable regulation under varying load and temperature. |
| Test Current (IZT) | 65 mA - operating point at which VZ and ZZ are specified; design must ensure bias current meets or exceeds this for rated accuracy. |
| Dynamic Impedance (ZZ) | 3.0 Ω max - low AC impedance ensures minimal output voltage deviation during transient current changes in regulation circuits. |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current before exceeding 5 W dissipation at TL = 25°C with adequate heatsinking. |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM; quantifies line regulation stability across operating current range. |
| Surge Current (IZSM) | 75 A - peak non-repetitive half-sine surge (8.3 ms) capability supports transient overvoltage clamping in protection circuits. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design with discrete lead-mounting; derates linearly above 25°C lead temp per Figure 1. |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case (void-free UL94V-0 epoxy), cathode indicated by colored band. Leads are annealed matte-tin plated per MIL-STD-750, solderable at 260°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to circuit ground or lower potential node; forms reference return path in shunt regulator topology. |
| Cathode | Zener breakdown terminal | Banded end; connected to regulated voltage node; maintains 20 V reference when reverse biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in feedback and sensing circuits. |
| RoHS-compliant e3 suffix | Meets EU RoHS Directive 2011/65/EU; matte-tin plating eliminates lead content while maintaining solderability. |
| Level 1 moisture sensitivity | No dry pack required per IPC/JEDEC J-STD-020B; simplifies handling and eliminates bake-out prior to assembly. |
| Nonsensitive to ESD | Withstands electrostatic discharge per MIL-STD-750 Method 1020; reduces need for additional ESD protection in board layout. |
| High surge current rating | 75 A peak (8.3 ms half-sine) supports robust transient suppression in industrial and automotive power rails. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage against line/load variations. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 20 V reference to TL431 or optocoupler input. Use Value: ±2% tolerance ensures output regulation within ±1% over temperature and aging, reducing need for post-production calibration. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transients exceeding 20 V. IC Role / Device Role / Timing Role: Passive overvoltage clamp limiting voltage excursion during ESD or inductive switching events. Use Value: 75 A surge rating allows single-device protection against IEC 61000-4-5 Level 4 surges without series impedance redesign. |
| Programmable Voltage Reference | Current Source Biasing |
Use Scenario: Paired with a current-setting resistor to generate a stable 20 V reference for ADCs, DACs, or analog comparators. IC Role / Device Role / Timing Role: Precision two-terminal voltage source establishing known bias point for analog signal chains. Use Value: Low ΔVZ (0.40 V) and 3.0 Ω ZZ minimize reference drift under varying load currents up to 75 mA. | Use Scenario: Provides fixed bias voltage to gate drivers or op-amp input stages requiring stable quiescent current. IC Role / Device Role / Timing Role: Constant-voltage node enabling predictable current mirror or amplifier biasing. Use Value: Thermal resistance of 25 °C/W allows direct lead-mounting to chassis or heat-spreading copper, sustaining 5 W dissipation without dedicated heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same 20 V nominal VZ but ±5% tolerance (B suffix); higher ZZ (3.0 Ω vs. 3.0 Ω same), identical IZM (75 mA) | Acceptable where tighter tolerance not required; lower cost; less stable reference under temperature drift | Select 1N5357B if system-level tolerance budget allows ±5% and cost optimization is prioritized. |
| SMBJ5357B | Surface-mount SMB package; same 20 V ±5%; 3.0 Ω ZZ; 75 mA IZM; different thermal profile (junction-to-ambient ~125 °C/W) | Used in space-constrained PCBs; requires reflow-compatible layout; lower power handling at ambient due to higher θJA | Select SMBJ5357B only when board area is constrained and thermal management via copper pour is feasible. |
Compared with 1N5357B and SMBJ5357B, the 1N5357CE3/TR8 delivers superior voltage accuracy (±2% vs. ±5%) and RoHS compliance, making it optimal for precision feedback and long-lifecycle industrial designs where reference stability and environmental compliance are critical.
Availability
1N5357CE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for 1N5357CE3/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 for rugged, high-stability voltage regulation in harsh environments-supporting military screening (JAN/JANTX), wide temperature operation (–65°C to +150°C), and high-surge resilience.
FAQ
What is the Zener voltage tolerance of the 1N5357CE3/TR8?
The 1N5357CE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its actual breakdown voltage falls within 19.6 V to 20.4 V at 65 mA test current and 25°C lead temperature, enabling high-accuracy voltage referencing in feedback and sensing applications where tighter regulation is required than standard ±5% devices like the 1N5357B.
Does the 1N5357CE3/TR8 require dry packing before PCB assembly?
No, the 1N5357CE3/TR8 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it can be stored and assembled without baking or humidity-controlled packaging. This simplifies manufacturing logistics and eliminates pre-reflow bake steps, reducing process time and cost for high-volume production of boards using the 1N5357CE3/TR8.
What is the maximum power dissipation of the 1N5357CE3/TR8 at 25°C?
The 1N5357CE3/TR8 is rated for 5.0 watts maximum power dissipation at 25°C lead temperature (TL), measured 3/8 inch (10 mm) from the body. Power must be derated linearly above 25°C per the curve in Figure 1 of the Microsemi datasheet; at 100°C TL, dissipation drops to approximately 3.75 W. This rating assumes adequate heat sinking through the leads, not ambient convection alone.
How is polarity identified on the 1N5357CE3/TR8?
Polarity on the 1N5357CE3/TR8 is indicated by a colored band on the cathode end of the axial-leaded T-18 package. The diode must be operated with the banded end (cathode) held at a more positive potential than the unbanded end (anode) to achieve Zener breakdown and voltage regulation. Reversing polarity subjects it to forward conduction (VF ≤ 1.2 V @ 1.0 A), not regulation.
Is the 1N5357CE3/TR8 suitable for surge protection applications?
Yes, the 1N5357CE3/TR8 is suitable for transient surge protection due to its specified 75 A non-repetitive peak surge current (IZSM) for an 8.3 ms half-sine waveform. This capability allows it to absorb energy from short-duration overvoltage events such as ESD or inductive kickback, especially when used with appropriate series impedance. Its 20 V clamping level makes it appropriate for protecting 18–24 V rail systems.
1N5357CE3/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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 14.4 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
1N5357CE3/TR8 FAQ
1.How can I place an order for 1N5357CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357CE3/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 1N5357CE3/TR8 reliable?
The price and inventory of 1N5357CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357CE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5357CE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357CE3/TR8 transactions.
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4.How is shipping managed for 1N5357CE3/TR8?
1N5357CE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357CE3/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 1N5357CE3/TR8?
For technical support, including 1N5357CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357CE3/TR8 requirements.
6.How does Aetrix verify that 1N5357CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5357CE3/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 1N5357CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5357CE3/TR8?
All 1N5357CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357CE3/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 1N5357CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5357CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357CE3/TR8 Tags
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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