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Microchip Technology 1N5345CE3/TR13
- Part No.:
- 1N5345CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5345CE3/TR13.pdf
- Description:
- DIODE ZENER 8.7V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,503
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Product details
Overview
1N5345CE3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with a nominal regulation voltage of 8.7 V ±2% (C suffix), 150 mA test current (IZT), 2.0 Ω dynamic impedance (ZZ), and 545 mA maximum Zener current (IZM) at 25°C lead temperature. It operates from −65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5345CE3/TR13 datasheet, 1N5345CE3/TR13 pinout, 1N5345CE3/TR13 application, or 1N5345CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (200 A), voltage regulation (ΔVZ = 0.20 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current (10–545 mA) and temperature ranges. Its low dynamic impedance (2.0 Ω) and tight ±2% voltage tolerance ensure minimal deviation under load variation.
The 1N5345CE3/TR13 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 5.0 W steady-state dissipation at TL < 25°C with 3/8″ (10 mm) lead length, and exhibits 0.20 V voltage regulation (ΔVZ) between 10% and 50% of IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.7 V ±2% - precise regulation point for feedback networks requiring tight tolerance |
| Test Current (IZT) | 150 mA - operating point where VZ and ZZ are specified; defines typical bias condition |
| Dynamic Impedance (ZZ) | 2.0 Ω - low AC resistance ensures minimal voltage shift under dynamic load changes |
| Max Zener Current (IZM) | 545 mA - maximum continuous DC current before thermal runaway when adequately heat-sunk |
| Voltage Regulation (ΔVZ) | 0.20 V - difference between VZ measured at 10% and 50% of IZM; indicates regulation linearity |
| Surge Current (IZSM) | 200 A - peak non-repetitive half-sine (8.3 ms) capability for transient overvoltage clamping |
| Thermal Resistance | 25 °C/W junction-to-lead - enables 5.0 W operation with modest heatsinking at lead termination |
| Operating Temperature | −65°C to +150°C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL; moisture sensitivity level 1 (no dry pack required); cathode indicated by colored band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-bias reference point for regulation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated voltage node; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in feedback paths |
| 25 °C/W junction-to-lead thermal resistance | Allows full 5.0 W dissipation with simple lead-length heatsinking-no PCB copper pour required |
| 200 A non-repetitive surge rating (8.3 ms) | Provides robust transient suppression in DC power rails subject to inductive switching spikes |
| RoHS-compliant e3 suffix | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating and halogen-free epoxy |
| JEDEC-registered 1N53xxB series | Guarantees standardized mechanical dimensions, marking, and reliability testing across manufacturers |
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: Primary-side Zener reference establishing precise 8.7 V threshold for TL431-like shunt regulator operation. Use Value: ±2% tolerance and 0.20 V ΔVZ ensure <±0.5% output voltage drift across line/load/temperature. | Use Scenario: Provides stable excitation voltage for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source replacing higher-cost IC references in analog front-end circuits. Use Value: Low 2.0 Ω dynamic impedance minimizes error contribution from sensor bias current variation. |
| Overvoltage Clamp for MCU I/O | DC Bus Voltage Monitor |
Use Scenario: Protects 3.3 V or 5 V microcontroller GPIO pins against ESD and inductive kickback in motor drive boards. IC Role / Device Role / Timing Role: Bidirectional transient suppressor configured with series resistor to limit clamp current. Use Value: 200 A surge rating and −65°C to +150°C range support harsh industrial EMC environments. | Use Scenario: Scales high-voltage DC bus (e.g., 48 V or 96 V) to ADC input range using resistive divider with Zener reference. IC Role / Device Role / Timing Role: Stable reference node for ratio-metric measurement, improving accuracy vs. supply variation. Use Value: 25 °C/W thermal resistance allows direct mounting to metal chassis for self-heatsinking in battery management units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5345B | Same 8.7 V nominal VZ but ±5% tolerance (B suffix) and higher ZZ (2.0 Ω vs. same value; note: both specify 2.0 Ω at IZT=150 mA) | Acceptable where tighter tolerance not required; lower cost; identical thermal and surge specs | Select 1N5345B if system-level calibration compensates for voltage variation; choose 1N5345CE3/TR13 for uncalibrated precision feedback |
| MMSZ5235ET1G | Surface-mount SOD-123 package; 8.7 V ±5%; 500 mW rating; 10 Ω ZZ; 65 mA IZM - not a power-equivalent replacement | Limited to low-power signal-level clamping; unsuitable for 5 W regulation or high-current surge handling | Use MMSZ5235ET1G only in space-constrained, low-power signal conditioning; retain 1N5345CE3/TR13 for primary power rail regulation |
Compared with 1N5345B and MMSZ5235ET1G, the 1N5345CE3/TR13 uniquely delivers ±2% tolerance at 5.0 W power handling and 200 A surge capability in an axial-leaded T-18 package-enabling direct replacement of legacy 1N53xx designs without layout or thermal redesign.
Availability
1N5345CE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply across extended temperature and long-life production programs.
Supply support for 1N5345CE3/TR13 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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in mission-critical power systems, emphasizing thermal robustness, surge resilience, and long-term stability under extreme environmental stress.
FAQ
What is the Zener voltage tolerance of the 1N5345CE3/TR13?
The 1N5345CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its nominal 8.7 V regulation voltage falls within 8.53–8.87 V at 25°C lead temperature under 150 mA test current, enabling high-accuracy voltage references without post-manufacture trimming.
Can the 1N5345CE3/TR13 replace the 1N5345B in existing designs?
Yes, the 1N5345CE3/TR13 is mechanically and electrically compatible with the 1N5345B-same T-18 package, pinout, thermal resistance, and surge rating-but offers tighter ±2% voltage tolerance versus ±5%. No PCB or thermal redesign is needed; it improves regulation accuracy while maintaining full interchangeability in legacy 1N5345B footprints.
What is the maximum continuous power dissipation for the 1N5345CE3/TR13?
The 1N5345CE3/TR13 is rated for 5.0 W steady-state power dissipation at a lead temperature (TL) below 25°C with 3/8″ (10 mm) lead length from the body. Derating is required above 25°C per Figure 1 in the datasheet; at 75°C TL, maximum power drops to approximately 3.75 W.
Does the 1N5345CE3/TR13 meet RoHS requirements?
Yes, the "e3" suffix in 1N5345CE3/TR13 explicitly denotes RoHS compliance: matte-tin plated leads per MIL-STD-750 Method 2026 and halogen-free void-free epoxy encapsulation meeting EU Directive 2011/65/EU, with no exemptions required for lead or other restricted substances.
What is the voltage regulation (ΔVZ) specification for the 1N5345CE3/TR13?
The voltage regulation (ΔVZ) for the 1N5345CE3/TR13 is 0.20 V-defined as the difference between Zener voltage measured at 10% and 50% of its maximum Zener current (IZM = 545 mA). This low ΔVZ confirms excellent line regulation performance across its operational current range.
1N5345CE3/TR13 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):
- 8.7 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6.25 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
1N5345CE3/TR13 FAQ
1.How can I place an order for 1N5345CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5345CE3/TR13 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 1N5345CE3/TR13 reliable?
The price and inventory of 1N5345CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5345CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5345CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5345CE3/TR13 transactions.
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4.How is shipping managed for 1N5345CE3/TR13?
1N5345CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5345CE3/TR13 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 1N5345CE3/TR13?
For technical support, including 1N5345CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5345CE3/TR13 requirements.
6.How does Aetrix verify that 1N5345CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5345CE3/TR13 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 1N5345CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5345CE3/TR13?
All 1N5345CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5345CE3/TR13, 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 1N5345CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5345CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5345CE3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
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