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Microchip Technology 1N5357AE3/TR12
- Part No.:
- 1N5357AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357AE3/TR12.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,301
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Product details
Overview
1N5357AE3/TR12 from Microsemi is a 5 W axial-leaded Zener diode with nominal regulation voltage of 20 V, ±10% tolerance (A suffix), 3.0 Ω dynamic impedance at 65 mA test current, and maximum reverse current of 0.5 μA at 14.4 V. 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/TR12 datasheet, 1N5357AE3/TR12 pinout, 1N5357AE3/TR12 application, or 1N5357AE3/TR12 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 regulator operating in reverse breakdown, maintaining stable output across wide current (65 mA IZT, up to 5.1 A IZM) and temperature ranges. Its low dynamic impedance (3.0 Ω) and tight ΔVZ (0.40 V) ensure minimal voltage drift under load variation.
The 1N5357AE3/TR12 uses void-free thermosetting epoxy encapsulation (UL94V-0), cathode band polarity marking, and is rated for 260 °C soldering (10 s). It meets moisture sensitivity Level 1 per J-STD-020B and supports tape-and-reel packaging (TR12 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, ±10% tolerance - defines regulated output level with worst-case range 18–22 V |
| Test Current (IZT) | 65 mA - operating point where VZ and ZZ are specified; sets minimum bias for regulation |
| Dynamic Impedance (ZZ) | 3.0 Ω at IZT - determines output voltage stability against current changes |
| Max Reverse Current (IR) | 0.5 μA at 14.4 V - ensures low leakage below knee voltage, critical for standby power integrity |
| Max Regulator Current (IZM) | 5.1 A - peak DC current at 25 °C lead temperature; derates linearly above 25 °C |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables 5 W dissipation with modest heatsinking at 3/8″ lead length |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS compliant, MIL-STD-750 solderable). Weight: 0.7 g. Tape-and-reel packaged per EIA-296 (TR12 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower potential; forward conduction path when biased positively |
| Cathode | Banded lead | Connected to regulated voltage node; reverse-biased during Zener operation; carries full IZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| RoHS-compliant plating | Matte-tin termination meets environmental compliance without sacrificing solderability |
| Level 1 moisture sensitivity | No dry pack required; simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special ESD controls needed during board assembly |
| High surge current rating | 75 A peak (8.3 ms half-sine) - withstands transient overvoltage events in power rails |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stable 20 V reference for feedback loop in 24 V DC-DC converter. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise voltage setpoint to error amplifier. Use Value: Low ΔVZ (0.40 V) and 3.0 Ω ZZ minimize output drift across load and temperature variations. |
Use Scenario: Protection of 20 V logic rail against 30 V transients from relay switching. IC Role / Device Role / Timing Role: Passive clamp limiting voltage excursion to safe levels before IC damage occurs. Use Value: 75 A surge rating and 0.5 μA leakage at 14.4 V enable reliable clamping without standby power penalty. |
| Programmable Current Source Bias | Temperature-Stable Sensor Excitation |
Use Scenario: Fixed-voltage bias for constant-current LED driver using external transistor. IC Role / Device Role / Timing Role: Voltage reference establishing base-emitter bias point for current mirror configuration. Use Value: –65 °C to +150 °C operating range and low thermal resistance (25 °C/W) maintain accuracy in high-temp enclosures. |
Use Scenario: Excitation source for RTD bridge in industrial temperature transmitter. IC Role / Device Role / Timing Role: Low-noise, stable voltage source driving precision resistive sensor element. Use Value: Tight voltage regulation (ΔVZ = 0.40 V) and low dynamic impedance reduce measurement uncertainty in analog front-end. |
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/TR12); same VZ, IZT, ZZ, and package | Higher precision required in feedback loops where 2 V tolerance margin is insufficient | Select 1N5357B when tighter voltage control is needed without changing layout or thermal design |
| MMBZ5248B-TP | Surface-mount SOD-123 package; 20 V, ±5%, 225 mW rating (vs. 5 W axial) | Space-constrained PCBs where leaded devices are impractical; not suitable for high-power dissipation | Choose MMBZ5248B-TP only for low-current (<50 mA), low-power signal-level regulation |
Compared with 1N5357B and MMBZ5248B-TP, the 1N5357AE3/TR12 offers the highest power handling (5 W) and widest operating temperature range (–65 °C to +150 °C), making it uniquely suited for industrial power conditioning where reliability under thermal stress and surge conditions is critical.
Availability
1N5357AE3/TR12 is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage clamp circuits, and programmable current source bias requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5357AE3/TR12 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 1N53xx series was designed specifically for robust, high-power voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge survivability, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5357AE3/TR12?
The 1N5357AE3/TR12 has a ±10% Zener voltage tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means its measured VZ falls between 18.0 V and 22.0 V at 65 mA and 25 °C lead temperature. The e3 suffix confirms RoHS compliance, and TR12 denotes EIA-296 tape-and-reel packaging.
Can the 1N5357AE3/TR12 be used in surface-mount designs?
No-the 1N5357AE3/TR12 is an axial-leaded T-18 package and is not compatible with SMT assembly. For surface-mount equivalents, Microsemi offers the SMBJ5357B or SMBG5357B in DO-214AA (SMB) packages. These share the same 20 V rating but differ in power rating, thermal performance, and mounting method-direct substitution is not recommended without layout and thermal redesign.
What is the maximum steady-state power dissipation for the 1N5357AE3/TR12 on a standard PCB?
When mounted on a FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5357AE3/TR12 dissipates up to 1.47 W at 25 °C ambient. This is derived from its 85 °C/W junction-to-ambient thermal resistance. At higher ambient temperatures or reduced copper area, derating per Figure 1 in the datasheet is required to avoid exceeding the 150 °C max junction temperature.
Does the 1N5357AE3/TR12 require dry packing or baking before reflow soldering?
No-the 1N5357AE3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry pack or baking. Its void-free epoxy body and matte-tin leads are qualified for 260 °C soldering (10 s max), fully supporting standard leaded reflow and wave processes.
How does the voltage regulation (ΔVZ) specification impact circuit performance for the 1N5357AE3/TR12?
The 1N5357AE3/TR12 specifies ΔVZ = 0.40 V-the difference between its Zener voltage measured at 10% and 50% of IZM (5.1 A). This quantifies nonlinearity in the breakdown region; a lower ΔVZ indicates better regulation under varying load current. In practice, this enables tighter output voltage control in shunt-regulated supplies where current swings significantly across operating conditions.
1N5357AE3/TR12 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/TR12 FAQ
1.How can I place an order for 1N5357AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357AE3/TR12 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/TR12 reliable?
The price and inventory of 1N5357AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5357AE3/TR12?
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1N5357AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357AE3/TR12 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/TR12?
For technical support, including 1N5357AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357AE3/TR12 requirements.
6.How does Aetrix verify that 1N5357AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5357AE3/TR12 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/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5357AE3/TR12?
All 1N5357AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357AE3/TR12, 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/TR12 part is unused and in its original packaging.
Return procedure for 1N5357AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357AE3/TR12 Tags
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