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Microchip Technology 1N5357AE3/TR8
- Part No.:
- 1N5357AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357AE3/TR8.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,540
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Product details
Overview
1N5357AE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 20 V, ±10% tolerance (A suffix), 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 1N5357AE3/TR8 datasheet, 1N5357AE3/TR8 pinout, 1N5357AE3/TR8 application, or 1N5357AE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), reverse leakage performance at 14.4 V, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its design centers on stable DC voltage clamping across a broad current range (10–75 mA) and temperature span (−65 °C to +150 °C), enabled by low thermal resistance (25 °C/W junction-to-lead) and moisture-resistant Level 1 packaging.
The 1N5357AE3/TR8 exhibits 0.40 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, and 237 Ω maximum dynamic knee impedance (ZZK) at 1.0 mA - critical for low-current biasing stability in reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±10% - defines regulated output level under nominal 65 mA test current |
| Power Dissipation | 5.0 W at TL = 25 °C (3/8″ lead length) - sets maximum continuous DC power handling with proper heatsinking |
| Dynamic Impedance (ZZ) | 3.0 Ω max @ IZT = 65 mA - ensures minimal voltage shift under load current variation |
| Max Reverse Current (IR) | 0.5 μA @ VR = 14.4 V - guarantees low leakage in high-impedance bias networks |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable thermal design with standard axial-lead PCB mounting |
| Operating Temperature | −65 °C to +150 °C - suitable for extended-range industrial and aerospace environments |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower-potential rail during Zener operation |
| Cathode | Reverse-biased regulation terminal / voltage clamp node | Banded end; connected to unregulated input or protected node; maintains 20 V reference relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with matte-tin plating and halogen-free epoxy body |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift |
| High surge current capability | 75 A non-recurrent surge rating enables robust transient voltage suppression |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing precise 20 V reference to optocoupler input or TL431 bias network. Use Value: Maintains ±10% regulation accuracy across −40 °C to +85 °C ambient with <0.4 V ΔVZ, ensuring consistent loop gain and output voltage stability. | Use Scenario: Clamping induced transients on 24 V DC control bus in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Shunt element diverting surge energy above 20 V to ground before reaching downstream logic ICs. Use Value: Absorbs 75 A (8.3 ms) surges without degradation, leveraging 5 W steady-state rating and 25 °C/W thermal path to prevent thermal runaway. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Setting threshold voltage for comparator-based battery charge termination in telecom backup systems. IC Role / Device Role / Timing Role: Primary voltage reference in dual-Zener or Zener-resistor divider configuration. Use Value: Delivers 20 V ±10% with 0.5 μA leakage at 14.4 V, minimizing current error in high-impedance divider arms. | Use Scenario: Establishing stable bias point for linear regulator pass transistor base drive in analog sensor signal conditioning. IC Role / Device Role / Timing Role: Temperature-compensated reference source in conjunction with NTC thermistor network. Use Value: Operates reliably from −65 °C to +150 °C with <3.0 Ω dynamic impedance, reducing thermal drift-induced offset in bias current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | ±5% tolerance (vs. ±10% for 1N5357AE3/TR8); otherwise identical electrical specs and package | Higher precision required where tighter voltage stability is critical (e.g., calibration references) | Select 1N5357B when ±5% VZ tolerance is mandatory; same thermal and surge ratings apply |
| MMSZ5248ET1G | Surface-mount SOD-123 package; 20 V ±5%; 500 mW rating (vs. 5 W axial); 30 Ω ZZ | Low-power, space-constrained PCBs where board area and weight are prioritized over surge robustness | Choose MMSZ5248ET1G only for <100 mA applications with no surge exposure; not a drop-in replacement |
Compared with 1N5357B and MMSZ5248ET1G, the 1N5357AE3/TR8 uniquely balances 5 W power handling, axial-lead mechanical robustness, ±10% cost-optimized tolerance, and 75 A surge immunity - making it optimal for industrial-grade power regulation where reliability under stress is non-negotiable.
Availability
1N5357AE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, programmable voltage references, and temperature-stable bias networks requiring stable component supply and long-term obsolescence management.
Supply support for 1N5357AE3/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 voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge survivability, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5357AE3/TR8?
The 1N5357AE3/TR8 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its regulated voltage falls within 18.0 V to 22.0 V at 65 mA test current and 25 °C lead temperature. The tolerance remains valid across its full operating temperature range of −65 °C to +150 °C, as confirmed in Microsemi's official datasheet revision D.
Does the 1N5357AE3/TR8 require dry packing before soldering?
No, the 1N5357AE3/TR8 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 classification due to its void-free UL94V-0 epoxy encapsulation. This allows indefinite floor life at ≤30 °C/60% RH, eliminating bake-out steps and simplifying SMT and through-hole assembly processes.
What is the maximum surge current rating for the 1N5357AE3/TR8?
The 1N5357AE3/TR8 is rated for a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating assumes proper PCB layout with adequate copper pour and is validated per Microsemi's test methodology in the 1N5333B–1N5388B datasheet.
How does the thermal resistance of the 1N5357AE3/TR8 affect PCB layout?
The 1N5357AE3/TR8 has a junction-to-lead thermal resistance of 25 °C/W when measured at 3/8″ (10 mm) lead length from the body. To maintain safe junction temperatures, PCB traces connected to its leads must provide sufficient copper area (e.g., ≥4 mm² pads) and avoid narrow necks that impede heat conduction away from the diode body.
Is the 1N5357AE3/TR8 compatible with lead-free reflow soldering?
Yes, the 1N5357AE3/TR8 supports lead-free soldering with a maximum peak temperature of 260 °C for 10 seconds, as specified in its mechanical and packaging data. Its RoHS-compliant matte-tin plating and UL94V-0 epoxy body are qualified for standard Pb-free reflow profiles without delamination or parametric shift.
1N5357AE3/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:
- ±10%
- 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
1N5357AE3/TR8 FAQ
1.How can I place an order for 1N5357AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357AE3/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 1N5357AE3/TR8 reliable?
The price and inventory of 1N5357AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357AE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5357AE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357AE3/TR8 transactions.
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4.How is shipping managed for 1N5357AE3/TR8?
1N5357AE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357AE3/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 1N5357AE3/TR8?
For technical support, including 1N5357AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357AE3/TR8 requirements.
6.How does Aetrix verify that 1N5357AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5357AE3/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 1N5357AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5357AE3/TR8?
All 1N5357AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357AE3/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 1N5357AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5357AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357AE3/TR8 Tags
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