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Microchip Technology 1N5357BE3/TR8
- Part No.:
- 1N5357BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357BE3/TR8.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,801
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Product details
Overview
1N5357BE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 20 V ±5%, 65 mA test current, 3.0 Ω dynamic impedance at 65 mA, 75 mA maximum Zener current (IZM), and 0.40 V voltage regulation (ΔVZ) across 10–50% IZM. It operates in power supply voltage reference and overvoltage protection circuits requiring stable regulation under varying load and temperature.
For engineers reviewing the 1N5357BE3/TR8 datasheet, 1N5357BE3/TR8 pinout, 1N5357BE3/TR8 application, or 1N5357BE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), moisture sensitivity level (MSL Level 1), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a precision shunt voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current (1–75 mA) and temperature (-65 °C to +150 °C) ranges. Its low dynamic impedance (3.0 Ω) and tight ±5% voltage tolerance ensure minimal deviation under load transients.
The 1N5357BE3/TR8 uses a void-free thermosetting epoxy T-18 package with cathode band marking, rated for 5 W steady-state dissipation at 25 °C lead temperature (3/8″ from body), and supports high-surge capability (75 A, 8.3 ms half-sine) without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% - defines precise regulation point for feedback loops and reference generation |
| Test Current (IZT) | 65 mA - operating point where VZ and dynamic impedance are specified |
| Dynamic Impedance (ZZ) | 3.0 Ω @ 65 mA - ensures low voltage variation under changing load current |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current before thermal runaway when adequately heat sunk |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 75 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with standard axial-lead PCB mounting |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common or ground; reverse bias applied to cathode for regulation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to unregulated input; maintains 20 V relative to anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance (B suffix) | Enables accurate voltage setting in feedback networks without trimming components |
| MSL Level 1 moisture classification | Eliminates dry-pack requirement and floor-life constraints for SMT assembly prep |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU and China RoHS II without lead or hazardous substances |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Reduces handling precautions and eliminates need for ESD-safe workstations |
| High surge current rating (75 A) | Provides robust transient suppression in industrial power rails without external TVS stacking |
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: Shunt voltage reference providing stable 20 V reference to TL431 or similar error amplifier. Use Value: Maintains ±1% output accuracy across line/load/temperature with no external calibration. | Use Scenario: Supplies stable excitation voltage to bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision analog reference source replacing higher-cost IC references in 4–20 mA transmitter front-ends. Use Value: Delivers <0.5% drift over -40 °C to +85 °C, reducing sensor offset error without active compensation. |
| Overvoltage Clamp for MCU I/O | DC Bus Voltage Monitor |
Use Scenario: Protects 3.3 V or 5 V microcontroller GPIO pins from accidental 24 V field wiring faults. IC Role / Device Role / Timing Role: Passive clamping element placed between I/O line and ground, conducting above 20 V threshold. Use Value: Limits fault voltage to safe level while surviving repeated 75 A surges per IEC 61000-4-5. | Use Scenario: Monitors 24 V DC distribution bus in transportation control cabinets for undervoltage/overvoltage alarms. IC Role / Device Role / Timing Role: Zener-based comparator input reference for discrete window detector circuit. Use Value: Enables reliable trip thresholds at 20 V ±0.4 V independent of supply ripple or temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | No e3 RoHS suffix; SnPb lead finish; same electrical specs and T-18 package | Not compliant with EU RoHS or China RoHS II; restricted in new designs targeting export markets | Select only for legacy repair or non-RoHS environments where leaded solder is used |
| SMBJ5357B | Surface-mount SMB package; identical 20 V ±5% regulation but different thermal profile (RθJA = 85 °C/W on FR4) | Requires PCB rework for space-constrained layouts; lower surge rating (40 A vs. 75 A) | Choose for automated SMT production where board area is critical and surge stress is moderate |
Compared with 1N5357B and SMBJ5357B, the 1N5357BE3/TR8 uniquely combines RoHS compliance, axial-lead mechanical robustness, highest surge rating (75 A), and MSL Level 1 handling-making it optimal for industrial power supplies and field-repairable equipment.
Availability
1N5357BE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and DC bus monitoring systems requiring stable component supply and long-term obsolescence management.
Supply support for 1N5357BE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems-emphasizing surge resilience, wide temperature operation, and military-grade screening compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5357BE3/TR8?
The 1N5357BE3/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its nominal 20 V regulation is guaranteed between 19.0 V and 21.0 V at 65 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS compliance but does not affect voltage tolerance.
Can the 1N5357BE3/TR8 be used in surface-mount designs?
No-the 1N5357BE3/TR8 is an axial-leaded T-18 package and requires through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5357B in SMB package. While electrically similar, the SMBJ5357B has higher thermal resistance (85 °C/W vs. 25 °C/W) and lower surge rating (40 A vs. 75 A), so direct substitution requires layout and reliability review.
What is the maximum power dissipation of the 1N5357BE3/TR8 at 25 °C?
The 1N5357BE3/TR8 is rated for 5.0 W steady-state power dissipation at 25 °C lead temperature (measured 3/8″ from body). When mounted on FR4 PCB with 1 oz copper, its derated power drops to 1.47 W at 25 °C ambient due to higher junction-to-ambient thermal resistance (85 °C/W).
Does the 1N5357BE3/TR8 require dry packing or special handling per moisture sensitivity?
No-the 1N5357BE3/TR8 carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level (MSL) 1 classification, meaning it has no floor-life limitation and does not require dry pack, baking, or humidity-controlled storage prior to assembly.
What is the forward voltage specification for the 1N5357BE3/TR8?
The forward voltage of the 1N5357BE3/TR8 is specified as ≤1.2 V at 1.0 A forward current. This parameter applies only when the device is operated in forward conduction mode-not during normal Zener regulation-and is relevant for polarity protection or OR-ing applications.
1N5357BE3/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:
- ±5%
- 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
1N5357BE3/TR8 FAQ
1.How can I place an order for 1N5357BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357BE3/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 1N5357BE3/TR8 reliable?
The price and inventory of 1N5357BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5357BE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357BE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357BE3/TR8?
1N5357BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357BE3/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 1N5357BE3/TR8?
For technical support, including 1N5357BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357BE3/TR8 requirements.
6.How does Aetrix verify that 1N5357BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5357BE3/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 1N5357BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5357BE3/TR8?
All 1N5357BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357BE3/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 1N5357BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5357BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357BE3/TR8 Tags
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MM5Z5V1ST1G
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