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Microchip Technology 1N5357CE3/TR12
- Part No.:
- 1N5357CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357CE3/TR12.pdf
- Description:
- DIODE ZENER 20V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,113
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Product details
Overview
1N5357CE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 20 V, ±2% tolerance (C suffix), 3.0 Ω maximum dynamic impedance at 65 mA test current, and 75 mA maximum Zener current when adequately heat-sunk. It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5357CE3/TR12 datasheet, 1N5357CE3/TR12 pinout, 1N5357CE3/TR12 application, or 1N5357CE3/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 voltage under varying load and line conditions. Its low dynamic impedance (3.0 Ω) and tight ±2% tolerance ensure minimal voltage drift across its specified 10–50% IZM current range.
The 1N5357CE3/TR12 features a T-18 axial package with cathode band marking, moisture sensitivity level 1 (no dry pack required), and UL94V-0 void-free epoxy encapsulation. It delivers 5 W steady-state power at TL < 25 °C with 3/8″ lead length, derating linearly above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±2% - precise regulation point for feedback loops and reference circuits |
| Test Current (IZT) | 65 mA - standardized bias point for measuring VZ and ZZ |
| Dynamic Impedance (ZZ) | 3.0 Ω max - low AC resistance ensures stable voltage under dynamic load changes |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current at rated power with proper heat sinking |
| Surge Current (IZSM) | 75 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead value enables accurate thermal design with 3/8″ lead length |
Pinout & Package
Package: T-18 axial-leaded plastic case (UL94V-0 epoxy), cathode indicated by colored band; leads are RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; current flows into cathode during regulation |
| Cathode | Regulated output terminal | Banded end; held at stable VZ above anode potential; referenced in feedback networks |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without post-calibration in analog power control circuits |
| RoHS-compliant e3 marking | Meets EU Directive 2011/65/EU with matte-tin plating-no lead content, compatible with Pb-free assembly |
| Moisture Sensitivity Level 1 | No dry pack or baking required before SMT/reflow-reduces handling cost and process risk |
| Low dynamic knee impedance (ZZK ≤ 5.1 Ω @ 1 mA) | Ensures stable turn-on behavior near threshold, critical for precision clamping and sensing |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands human-body-model discharges without parameter shift-reduces incoming inspection burden |
Applications
| Industrial Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference element setting error amplifier trip point. Use Value: ±2% VZ tolerance and 0.40 V ΔVZ minimize output variation across line/load/temperature. |
Use Scenario: Clamping transient surges on 24 V DC rails in PLC I/O modules. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground during EFT events. Use Value: 75 A surge rating and 25 °C/W thermal resistance enable reliable single-event energy absorption without thermal runaway. |
| Temperature-Stable Reference Source | DC-DC Converter Bias Network |
Use Scenario: Providing stable 20 V reference for RTD signal conditioning in environmental monitoring sensors. IC Role / Device Role / Timing Role: Low-drift voltage source feeding instrumentation amplifier bias network. Use Value: Minimal VZ drift over –65 °C to +150 °C supports operation in unheated outdoor enclosures. |
Use Scenario: Generating gate drive bias for high-side N-channel MOSFETs in synchronous buck controllers. IC Role / Device Role / Timing Role: Zener-based floating supply rail for level-shifting driver ICs. Use Value: 3.0 Ω ZZ and 75 mA IZM sustain stable bias under pulsed loading from gate charge/discharge currents. |
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 (B suffix), same VZ = 20 V, identical package and IZM | Lower accuracy acceptable in non-critical biasing or coarse clamping | Select when ±5% regulation stability suffices and cost optimization is prioritized |
| MMSZ5249ET1G | Surface-mount SOD-123 package, 500 mW rating, ±5%, VZ = 20 V | Not suitable for 5 W dissipation; limited to low-power logic-level clamping | Choose only for space-constrained PCBs where thermal budget permits ≤0.5 W operation |
Compared with 1N5357CE3/TR12, the 1N5357B offers looser tolerance at lower cost but identical thermal and surge performance, while MMSZ5249ET1G trades power capability for miniaturization-neither is pin-compatible, and both require layout revision.
Availability
1N5357CE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, precision reference sources, and DC-DC converter bias networks requiring stable component supply and long-term obsolescence management.
Supply support for 1N5357CE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5357CE3/TR12?
The 1N5357CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage falls within 19.6 V to 20.4 V at 65 mA test current and 25 °C lead temperature. The tighter tolerance supports higher-accuracy feedback and reference applications compared to ±5% (B suffix) or ±10% (A suffix) variants in the same family.
Does the 1N5357CE3/TR12 require dry packing before use?
No, the 1N5357CE3/TR12 has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb sufficient moisture during ambient storage to require dry packing or baking prior to soldering. This simplifies handling and eliminates pre-reflow bake cycles in manufacturing.
What is the maximum surge current rating for the 1N5357CE3/TR12?
The 1N5357CE3/TR12 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 reflects its ability to absorb transient energy in overvoltage protection roles without failure, provided the device is properly mounted with adequate thermal mass.
How does the thermal resistance of the 1N5357CE3/TR12 affect PCB layout?
The 1N5357CE3/TR12 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8″ (10 mm) from the body. To maintain safe junction temperatures, PCB traces connected to its leads should be wide and short, and copper pour area around the leads should be maximized-especially critical when operating near its 5 W power limit.
Is the 1N5357CE3/TR12 RoHS compliant?
Yes, the "e3" suffix in 1N5357CE3/TR12 explicitly indicates RoHS compliance. Its leads are annealed matte-tin plated per MIL-STD-750 Method 2026, containing no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE, and meeting EU Directive 2011/65/EU requirements for hazardous substances.
1N5357CE3/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:
- ±2%
- 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
1N5357CE3/TR12 FAQ
1.How can I place an order for 1N5357CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357CE3/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 1N5357CE3/TR12 reliable?
The price and inventory of 1N5357CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5357CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357CE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357CE3/TR12?
1N5357CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357CE3/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 1N5357CE3/TR12?
For technical support, including 1N5357CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357CE3/TR12 requirements.
6.How does Aetrix verify that 1N5357CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5357CE3/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 1N5357CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5357CE3/TR12?
All 1N5357CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357CE3/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 1N5357CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5357CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5357CE3/TR12 Tags
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MM5Z5V1ST1G
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