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Microchip Technology 1N5357E3/TR13
- Part No.:
- 1N5357E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357E3/TR13.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,972
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Product details
Overview
1N5357E3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with a nominal regulation voltage of 20 V, ±5% tolerance (B-suffix equivalent), 3.0 Ω dynamic impedance at 65 mA test current, and maximum reverse current of 0.5 μA at 15.2 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 1N5357E3/TR13 datasheet, 1N5357E3/TR13 pinout, 1N5357E3/TR13 application, or 1N5357E3/TR13 equivalent, key selection criteria include Zener voltage stability under varying load currents, low dynamic impedance for tight regulation, thermal resistance performance on FR4 PCBs, and RoHS-compliant matte-tin lead plating compatibility with automated assembly.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse-biased breakdown mode. Its Zener voltage is specified at 20 V ±5% (VZ = 20 V, VZM = 21.0 V), with test current IZT = 65 mA and maximum Zener current IZM = 75 mA when adequately heat-sunk at TL = 25°C.
It exhibits 3.0 Ω dynamic impedance (ZZ) at IZT, 0.40 V voltage regulation (ΔVZ) between 10% and 50% of IZM, and 237 Ω knee impedance (ZZK) at 1.0 mA - confirming stable regulation across wide current ranges and suitability for low-noise reference applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% - defines precise clamping level for feedback networks and voltage references |
| Power Dissipation | 5.0 W at TL = 25°C - supports high-current regulation with proper lead-length heat sinking |
| Dynamic Impedance (ZZ) | 3.0 Ω at IZT = 65 mA - ensures minimal output voltage variation under load transients |
| Reverse Current (IR) | 0.5 μA max at VR = 15.2 V - guarantees low leakage in standby and precision bias circuits |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - enables thermal design using standard axial-lead mounting |
| Operating Temperature | –65°C to +150°C - supports deployment in industrial and automotive under-hood environments |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - provides robust transient overvoltage suppression capability |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), cathode indicated by band. Leads are annealed matte-tin plated per MIL-STD-750 Method 2026, RoHS compliant (e3 suffix), weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes reference potential for Zener operation |
| Cathode (banded end) | Regulated output node | Supplies stable 20 V when reverse-biased; polarity must be observed for correct regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special ESD controls during manual assembly or test |
| Steady-state power rating | 1.47 W on FR4 (1 oz Cu, 4 mm² pad) - enables direct PCB mounting without heatsink in moderate-power designs |
| RoHS-compliant plating (e3) | Meets global environmental compliance requirements and supports Pb-free soldering processes |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 20 V threshold to TL431 or optocoupler LED drive circuit. Use Value: Tight 5% tolerance and low 3.0 Ω dynamic impedance ensure ±1% output regulation accuracy across line/load variations. | Use Scenario: Supplies stable excitation voltage to bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing fixed bias point independent of supply fluctuations. Use Value: 0.5 μA reverse leakage at 15.2 V minimizes sensor offset drift; –65°C to +150°C rating supports unheated enclosures. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Clamps transient surges on 24 V DC control bus in PLC backplanes. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy during lightning-induced spikes or inductive kickback. Use Value: 75 A surge rating (8.3 ms) and 20 V clamping level protect downstream logic without crowbar action. | Use Scenario: Sets trip point for comparator-based battery undervoltage lockout in portable medical devices. IC Role / Device Role / Timing Role: Precision voltage threshold element defining 20 V cutoff boundary for Li-ion battery packs. Use Value: ΔVZ = 0.40 V ensures consistent activation across temperature and aging, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | No e3 RoHS suffix; SnPb lead finish; same electrical specs and package | Not suitable for Pb-free assembly; requires legacy solder process | Select 1N5357B only if SnPb reflow is mandated and RoHS exemption applies |
| MMBZ5242B (SOT-23) | Surface-mount, 0.5 W rating, 12 V Zener, different package and power class | Used in space-constrained consumer electronics; not drop-in for axial-leaded 5 W designs | Choose MMBZ5242B only for low-power, high-density PCB layouts where thermal derating permits |
Compared with 1N5357B and MMBZ5242B, the 1N5357E3/TR13 uniquely combines 5 W power handling, axial-leaded through-hole mountability, RoHS compliance, and 20 V ±5% regulation - making it optimal for industrial power supplies requiring field-replaceable, thermally robust references.
Availability
1N5357E3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and programmable threshold detectors requiring stable component supply and long-term obsolescence management.
Supply support for 1N5357E3/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) 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 specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, ESD immunity, and JEDEC-standardized mechanical interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5357E3/TR13?
The 1N5357E3/TR13 has a Zener voltage tolerance of ±5%, confirmed by its "B"-suffix equivalent designation in the 1N5333B–1N5388B family. This corresponds to a nominal 20 V regulation point ranging from 19.0 V to 21.0 V at 65 mA test current and 25°C lead temperature. The e3 suffix indicates RoHS compliance but does not alter voltage tolerance.
Can the 1N5357E3/TR13 be used in surface-mount designs?
No - the 1N5357E3/TR13 is an axial-leaded T-18 package device intended for through-hole mounting. Microsemi offers surface-mount equivalents such as SMBJ5357B (DO-214AA) for similar electrical performance, but the 1N5357E3/TR13 itself requires axial lead insertion and wave or hand soldering. Its thermal path relies on 3/8″ lead length for rated 5 W dissipation.
What is the maximum steady-state power dissipation of the 1N5357E3/TR13 on a standard FR4 PCB?
When mounted on FR4 with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5357E3/TR13 delivers 1.47 W steady-state power at 25°C ambient. This value derives from its 85°C/W junction-to-ambient thermal resistance under those conditions. Exceeding this without forced air or heatsinking risks exceeding the 150°C maximum junction temperature.
Does the 1N5357E3/TR13 require moisture preconditioning before reflow?
No - the 1N5357E3/TR13 carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 classification, meaning it is not hygroscopic and requires no dry pack, baking, or floor-life controls prior to reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during assembly.
How does the voltage regulation (ΔVZ) specification impact circuit performance for the 1N5357E3/TR13?
The 1N5357E3/TR13 specifies ΔVZ = 0.40 V - the difference between Zener voltage measured at 10% and 50% of IZM (7.5 mA and 37.5 mA). This quantifies regulation linearity: lower ΔVZ means less voltage shift across operating current range, directly improving stability in feedback and reference applications where load current varies dynamically.
1N5357E3/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):
- 20 V
- Tolerance:
- ±20%
- 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
1N5357E3/TR13 FAQ
1.How can I place an order for 1N5357E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357E3/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 1N5357E3/TR13 reliable?
The price and inventory of 1N5357E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5357E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357E3/TR13?
1N5357E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357E3/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 1N5357E3/TR13?
For technical support, including 1N5357E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357E3/TR13 requirements.
6.How does Aetrix verify that 1N5357E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5357E3/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 1N5357E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5357E3/TR13?
All 1N5357E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357E3/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 1N5357E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5357E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357E3/TR13 Tags
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