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Microchip Technology 1N5357E3/TR8
- Part No.:
- 1N5357E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357E3/TR8.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,453
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Product details
Overview
1N5357E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 20 V, ±5% tolerance (B-suffix equivalent), 3.0 Ω maximum dynamic impedance at 65 mA test current, and 75 mA maximum Zener current when adequately heat-sunk. 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 1N5357E3/TR8 datasheet, 1N5357E3/TR8 pinout, 1N5357E3/TR8 application, or 1N5357E3/TR8 equivalent, key selection criteria include Zener voltage stability under varying load currents, thermal resistance (25 °C/W junction-to-lead), surge current capability (75 A), low voltage regulation drift (0.40 V ΔVZ), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its Zener voltage is specified at 20 V ±5% with 65 mA test current, and it maintains regulation across a wide current range (10%–50% of IZM) with only 0.40 V variation (ΔVZ).
Thermal design relies on junction-to-lead thermal resistance of 25 °C/W at 3/8″ lead length; derating begins above 25 °C ambient or lead temperature. The device exhibits 237 Ω maximum dynamic knee impedance (ZZK) at 1.0 mA and withstands non-repetitive 8.3 ms half-sine surge currents up to 75 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% - stable regulation point for reference and clamp circuits |
| Test Current (IZT) | 65 mA - defined operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 3.0 Ω max - low AC resistance ensures minimal voltage shift under dynamic load changes |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current at 25 °C with proper heat sinking |
| Power Dissipation (PD) | 5.0 W at TL ≤ 25 °C - requires thermal management beyond 25 °C per Figure 1 derating curve |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 75 A - peak non-repetitive 8.3 ms half-sine current handling for transient suppression |
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, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased operation places cathode at higher potential |
| Cathode | Zener breakdown terminal / regulation output node | Banded end; connected to regulated voltage rail; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and electrical behavior across global supply chain |
| Moisture sensitivity Level 1 | No dry pack required prior to PCB assembly - simplifies manufacturing logistics and reduces cost |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU with lead-free matte-tin plating and halogen-free epoxy |
| High surge current rating (75 A) | Provides robust transient overvoltage clamping without degradation in power supply rails |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference source providing stable 20 V bias for optocoupler-driven feedback loop. Use Value: Maintains ±0.40 V regulation across 7.5–37.5 mA load variation, ensuring tight output voltage tolerance under line/load transients. | Use Scenario: Clamping induced surges on 24 V control bus lines in PLC backplanes exposed to inductive switching noise. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting transient energy to ground before downstream logic ICs exceed absolute maximum ratings. Use Value: Withstands 75 A 8.3 ms surges while limiting clamped voltage to ≤20.4 V, protecting 24 V-rated RS-485 transceivers. |
| Programmable Logic Controller (PLC) Input Conditioning | Automotive Body Control Module Reference |
Use Scenario: Providing stable 20 V Zener reference for analog input scaling circuitry in 0–10 V sensor interface modules. IC Role / Device Role / Timing Role: Fixed-voltage reference enabling accurate ADC full-scale calibration against known 20 V source. Use Value: Delivers <0.5% voltage drift over –40 °C to +85 °C due to low ΔVZ and stable thermal coefficient, improving sensor measurement repeatability. | Use Scenario: Generating a stable 20 V reference for microcontroller ADC monitoring of 12 V battery voltage via resistive divider in BCM power management. IC Role / Device Role / Timing Role: Temperature-stable voltage reference enabling accurate battery state-of-charge estimation across vehicle operating conditions. Use Value: Operates reliably from –40 °C to +125 °C with no dry pack required, meeting automotive AEC-Q200 ambient storage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same 20 V ±5% VZ, identical electrical specs, but leaded SnPb plating (non-RoHS) | Not suitable for RoHS-compliant production; requires exemption documentation | Select 1N5357E3/TR8 for new designs requiring lead-free compliance; use 1N5357B only for legacy repair or exempted military programs |
| SMBJ5357B | Surface-mount SMB package; same 20 V ±5% VZ; 5.0 W rating; 200 °C/W junction-to-ambient (unmounted) | Requires PCB rework for SMT placement; lower thermal performance without heatsinking | Choose SMBJ5357B only when board space constraints mandate SMT; retain 1N5357E3/TR8 for through-hole reliability and thermal management in high-power industrial designs |
Compared with 1N5357B and SMBJ5357B, the 1N5357E3/TR8 uniquely combines RoHS compliance, axial-leaded mechanical robustness, and superior junction-to-lead thermal resistance (25 °C/W), making it optimal for thermally demanding through-hole applications where long-term stability and ease of manual rework matter.
Availability
1N5357E3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controller (PLC) input conditioning, and automotive body control module reference circuits requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 1N5357E3/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 specifically for ruggedized 5 W voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge immunity, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5357E3/TR8?
The 1N5357E3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its base part number (1N5357B). This means its nominal 20 V regulation point falls within 19.0 V to 21.0 V at 65 mA test current and 25 °C lead temperature. The e3 suffix confirms RoHS compliance but does not alter voltage tolerance.
Can the 1N5357E3/TR8 be used without a heatsink?
The 1N5357E3/TR8 can operate at full 5.0 W dissipation only when lead temperature (TL) is maintained at ≤25 °C - typically requiring a heatsink or substantial copper pour. Without heatsinking, its steady-state power drops to 1.47 W on FR4 with 4 mm² pads. Derating curves in the datasheet must be followed to avoid thermal runaway.
What is the maximum surge current rating for the 1N5357E3/TR8?
The 1N5357E3/TR8 is rated for a maximum non-repetitive surge current (IZSM) of 75 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating enables reliable transient suppression in industrial control environments where inductive load switching generates high-energy spikes.
How does the voltage regulation (ΔVZ) specification apply to the 1N5357E3/TR8?
The voltage regulation ΔVZ of 0.40 V for the 1N5357E3/TR8 is the difference between its Zener voltage measured at 10% (7.5 mA) and 50% (37.5 mA) of maximum Zener current (IZM = 75 mA). This quantifies its ability to maintain stable regulation across typical operating current ranges in feedback and reference circuits.
Is the 1N5357E3/TR8 suitable for automotive applications?
Yes - the 1N5357E3/TR8 operates across –65 °C to +150 °C, meets moisture sensitivity Level 1 (no dry pack), and is nonsensitive to ESD per MIL-STD-750 Method 1020. These characteristics support use in automotive body control modules, though system-level qualification per AEC-Q200 remains the designer's responsibility.
1N5357E3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N5357E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357E3/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 1N5357E3/TR8 reliable?
The price and inventory of 1N5357E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5357E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357E3/TR8?
1N5357E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357E3/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 1N5357E3/TR8?
For technical support, including 1N5357E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357E3/TR8 requirements.
6.How does Aetrix verify that 1N5357E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5357E3/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 1N5357E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5357E3/TR8?
All 1N5357E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357E3/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 1N5357E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5357E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357E3/TR8 Tags
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