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Microchip Technology 1N5348CE3/TR12
- Part No.:
- 1N5348CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348CE3/TR12.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,124
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Product details
Overview
1N5348CE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 11 V, ±2% tolerance (C suffix), 125 mA maximum Zener test current (IZT), 430 Ω maximum dynamic impedance (ZZ), and 8.0 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. 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 1N5348CE3/TR12 datasheet, 1N5348CE3/TR12 pinout, 1N5348CE3/TR12 application, or 1N5348CE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (14.4 A), moisture sensitivity level (Level 1), 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, where the cathode band indicates polarity and must be held positive relative to the anode. Its regulation stability relies on low dynamic impedance (430 Ω max at 125 mA) and tight voltage tolerance (±2%), enabling accurate reference generation under varying load and temperature conditions.
The 1N5348CE3/TR12 is rated for 5.0 W steady-state dissipation at 25°C lead temperature (3/8″ from body), with derating to 1.47 W at 25°C ambient when mounted on FR4 PCB (1 oz Cu, 4 mm² pad). Thermal resistance is specified as 25 °C/W junction-to-lead and 85 °C/W junction-to-ambient under defined board conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±2% - precise reference voltage for feedback networks requiring stable setpoints |
| Test Current (IZT) | 125 mA - operating point at which VZ and ZZ are guaranteed; defines minimum bias for regulation |
| Dynamic Impedance (ZZ) | 430 Ω max - low AC impedance ensures minimal output voltage variation under dynamic load changes |
| Max Regulator Current (IZM) | 8.0 A - peak DC current capability with adequate heat sinking; determines power handling margin |
| Voltage Regulation (ΔVZ) | 8.0 V max - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Surge Current (IZSM) | 14.4 A - non-repetitive 8.3 ms half-sine peak current; supports transient overvoltage clamping |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design with discrete heatsinking via leads |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by color band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias current sink terminal | Connected to lower-potential node (e.g., ground or return path); carries full Zener current during regulation |
| Cathode | Reverse-biased voltage reference terminal | Banded end; connected to regulated output node; defines 11 V reference potential relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in feedback circuits |
| JEDEC-registered 1N53xxB series | Ensures mechanical and electrical interchangeability across qualified suppliers and legacy designs |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-supports standard SMT assembly flow |
| RoHS-compliant e3 suffix | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating and lead-free construction |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protective packaging in production |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Provides stable 11 V reference to TL431 or similar shunt regulator IC; sets primary-side feedback threshold. Use Value: ±2% tolerance ensures <±0.22 V output deviation across unit-to-unit variation, improving system accuracy without calibration. | Use Scenario: Clamps transient overvoltage spikes on 12 V rail caused by inductive load switching or ESD events. IC Role / Device Role / Timing Role: Acts as passive crowbar element; conducts above 11 V to divert surge energy to ground before downstream ICs exceed absolute maximum ratings. Use Value: 14.4 A surge rating (8.3 ms half-sine) absorbs >1.2 J energy, protecting 12 V logic and interface ICs per IEC 61000-4-5 Level 3. |
| Programmable Reference Source | Temperature-Stable Bias Generator |
Use Scenario: Sets bias point for op-amp input stage or ADC reference buffer in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Supplies fixed 11 V reference to precision resistor divider network; establishes known gain or offset calibration point. Use Value: Low ΔVZ (8.0 V max) and 25 °C/W thermal resistance minimize drift over –40°C to +85°C ambient, maintaining <0.5% reference error. | Use Scenario: Generates stable bias current for BJT amplifier stages in telecom line drivers where thermal runaway must be avoided. IC Role / Device Role / Timing Role: Forms constant-current source with series resistor; regulates base-emitter voltage drop via temperature-compensated Zener conduction. Use Value: Tight ±2% tolerance and low ZZ ensure <±1.5 mA current variation across 10–100 mA load range, stabilizing quiescent operating point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B | Same 11 V nominal VZ but ±5% tolerance (B suffix) vs. ±2% for 1N5348CE3/TR12; identical package, thermal specs, and IZM | Lower accuracy reference; suitable where cost priority outweighs precision requirement | Select 1N5348B only if ±5% regulation error is acceptable in feedback or clamp function |
| MMSZ5242BT1G | Surface-mount SOD-123 package; 11.4 V nominal VZ (±5%), 200 mW power rating; no axial leads or 5 W capability | Not interchangeable for high-power regulation; limited to low-current bias/reference roles | Choose MMSZ5242BT1G only for space-constrained PCBs where power dissipation ≤200 mW and axial mounting is prohibited |
Compared with 1N5348B and MMSZ5242BT1G, the 1N5348CE3/TR12 delivers superior voltage accuracy (±2% vs. ±5%) and 25× higher power handling (5 W vs. 200 mW), making it uniquely suited for robust, high-stability 11 V regulation in industrial power systems.
Availability
1N5348CE3/TR12 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage protection clamp, and programmable reference source applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant procurement.
Supply support for 1N5348CE3/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 1N53xxB series was designed specifically for ruggedized 5 W axial Zener regulation in harsh-environment power systems where thermal stability, surge resilience, and JEDEC-standard interchangeability are critical.
FAQ
What is the Zener voltage tolerance of the 1N5348CE3/TR12?
The 1N5348CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage falls within 10.78 V to 11.22 V at 125 mA test current and 25°C lead temperature, enabling high-accuracy reference applications where tighter regulation than ±5% (B suffix) is required.
How does the 1N5348CE3/TR12 differ from the 1N5348BE3/TR12?
The 1N5348CE3/TR12 differs from the 1N5348BE3/TR12 solely in voltage tolerance: "C" denotes ±2%, while "B" denotes ±5%. Both share identical 11 V nominal VZ, 125 mA IZT, 430 Ω ZZ, 8.0 A IZM, T-18 package, and RoHS-compliant e3 construction. The 1N5348CE3/TR12 is selected when tighter regulation is mandatory for system-level accuracy.
What is the maximum surge current rating for the 1N5348CE3/TR12?
The 1N5348CE3/TR12 has a maximum non-repetitive surge current (IZSM) rating of 14.4 A for an 8.3 ms half-sine waveform. This value is derived from its 5 W power rating and 11 V Zener voltage, allowing it to safely absorb transient energy in overvoltage clamp applications without degradation when properly heatsunk.
Is the 1N5348CE3/TR12 suitable for surface-mount assembly?
No, the 1N5348CE3/TR12 is not suitable for surface-mount assembly. It uses an axial-leaded T-18 package with 3/8″ lead length, designed for through-hole mounting and discrete heatsinking. For SMT equivalents, Microsemi offers the SMBJ5348B or SMBG5348B in DO-214AA/DO-214AB packages-neither is pin-compatible with the 1N5348CE3/TR12.
What is the thermal resistance specification for the 1N5348CE3/TR12?
The 1N5348CE3/TR12 has a thermal resistance of 25 °C/W junction-to-lead (measured at 3/8″ lead length from body) and 85 °C/W junction-to-ambient when mounted on a standard FR4 PCB (1 oz Cu, 4 mm² copper pad, 1 mm track width, 25 mm length). These values define its thermal design envelope for continuous 5 W operation.
1N5348CE3/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):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 8 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
1N5348CE3/TR12 FAQ
1.How can I place an order for 1N5348CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348CE3/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 1N5348CE3/TR12 reliable?
The price and inventory of 1N5348CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5348CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348CE3/TR12 transactions.
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4.How is shipping managed for 1N5348CE3/TR12?
1N5348CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348CE3/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 1N5348CE3/TR12?
For technical support, including 1N5348CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348CE3/TR12 requirements.
6.How does Aetrix verify that 1N5348CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5348CE3/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 1N5348CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5348CE3/TR12?
All 1N5348CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348CE3/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 1N5348CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5348CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348CE3/TR12 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
Diodes Incorporated
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