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Microchip Technology 1N5344CE3/TR12
- Part No.:
- 1N5344CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5344CE3/TR12.pdf
- Description:
- DIODE ZENER 8.2V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
1N5344CE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 8.2 V, ±2% tolerance (C suffix), 150 mA maximum Zener current (IZM), 1.5 Ω dynamic impedance (ZZ) at 150 mA test current, and operates across –65°C to +150°C. It serves as a precision voltage reference or shunt regulator in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5344CE3/TR12 datasheet, 1N5344CE3/TR12 pinout, 1N5344CE3/TR12 application, or 1N5344CE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (10 A), reverse leakage (<10 µA at 6.2 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a shunt voltage regulator by maintaining stable reverse-bias conduction above its specified Zener breakdown voltage. Its low dynamic impedance (1.5 Ω) ensures minimal voltage variation under load changes, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W operation with standard lead-length heat sinking.
The 1N5344CE3/TR12 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 260 °C soldering (10 s), and complies with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. It is not a surface-mount device and has no integrated control logic or active circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V ±2% - precise regulation point for feedback or clamping at nominal 150 mA test current. |
| Power Dissipation (PD) | 5.0 W at TL = 25°C (3/8″ lead length) - defines maximum continuous DC power handling with adequate heatsinking. |
| Dynamic Impedance (ZZ) | 1.5 Ω at IZT = 150 mA - low AC impedance ensures tight voltage regulation under varying load currents. |
| Max Reverse Current (IR) | <10 µA at VR = 6.2 V - confirms sharp knee and low leakage below regulation threshold. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design using lead length as primary heat path; FR4 board mounting yields 85 °C/W ambient. |
| Surge Current (IZSM) | 10 A peak (8.3 ms half-sine) - supports transient overvoltage suppression without failure. |
| Forward Voltage (VF) | 1.2 V max at IF = 1.0 A - defines conduction loss when used in forward-biased protection paths. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case (void-free UL94V-0 epoxy), cathode indicated by colored band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or lower potential in shunt regulation. | Low forward voltage drop (≤1.2 V @ 1 A) minimizes conduction loss during fault conditions. |
| Cathode | Current exit terminal in forward bias; connected to regulated node or higher potential in shunt regulation. | Banded end must be held positive relative to anode for Zener operation; defines polarity for correct circuit integration. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter output regulation in feedback networks without external trimming components. |
| RoHS-compliant e3 suffix | Meets global environmental compliance requirements with matte-tin lead finish and halogen-free epoxy body. |
| JEDEC-registered 1N53xxB series | Guarantees standardized electrical behavior, mechanical dimensions, and reliability testing across manufacturers. |
| Level 1 moisture sensitivity | Eliminates bake-out requirement prior to PCB assembly, reducing manufacturing cost and process complexity. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protective packaging during logistics and assembly. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage within ±2%. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 8.2 V reference to TL431 or similar error amplifier. Use Value: Tight 8.2 V ±2% tolerance directly improves output voltage accuracy without calibration. |
Use Scenario: Placed between microcontroller GPIO pin and ground to clamp input transients exceeding 8.2 V. IC Role / Device Role / Timing Role: Passive overvoltage protection element limiting voltage seen by sensitive CMOS input structures. Use Value: 10 A surge rating absorbs 8.3 ms transients (e.g., ESD or inductive kick) without degradation. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Stabilizes excitation voltage for bridge-based pressure sensors operating from unregulated 12 V rails. IC Role / Device Role / Timing Role: Precision shunt regulator establishing clean 8.2 V reference for analog front-end circuitry. Use Value: Low 1.5 Ω dynamic impedance maintains reference stability despite sensor current fluctuations. |
Use Scenario: Mounted across digital input terminals of PLC modules to suppress field-induced surges on 24 V industrial lines. IC Role / Device Role / Timing Role: High-energy shunt clamp diverting surge current away from input protection ICs and isolation barriers. Use Value: 5 W steady-state and 10 A peak surge capability handles repetitive line transients in factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5344B | Same 8.2 V nominal voltage but ±5% tolerance (B suffix); otherwise identical ratings and package. | Acceptable where ±5% regulation is sufficient; lower cost than C-suffix variant. | Select 1N5344B if system-level tolerance budget allows wider Zener voltage spread. |
| MMSZ5231ET1G | Surface-mount SOD-123 package; 8.2 V ±5%, 500 mW power rating; 10x lower power and different thermal profile. | Only suitable for low-power signal-level clamping-not for 5 W shunt regulation or high-current feedback. | Choose MMSZ5231ET1G only for space-constrained PCBs where full 5 W dissipation is unnecessary. |
Compared with 1N5344B and MMSZ5231ET1G, the 1N5344CE3/TR12 uniquely delivers ±2% tolerance in a 5 W axial-leaded package, enabling high-accuracy, high-power shunt regulation without layout redesign or derating compromises.
Availability
1N5344CE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and programmable logic controller input protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5344CE3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for robust, high-power Zener regulation in harsh-environment power systems-emphasizing thermal performance, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5344CE3/TR12?
The 1N5344CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its actual breakdown voltage falls within 8.036 V to 8.364 V at 150 mA test current and 25°C lead temperature. This tighter tolerance supports precision regulation where ±5% variants like the 1N5344B would introduce excessive output variation.
Can the 1N5344CE3/TR12 be used in surface-mount designs?
No-the 1N5344CE3/TR12 is an axial-leaded T-18 package device intended for through-hole mounting. It is not compatible with SMT reflow processes. For surface-mount equivalents, Microsemi offers the SMBJ5344B (SMB package) or consider the MMSZ5231ET1G (SOD-123), though both differ significantly in power rating, tolerance, and thermal behavior compared to the 1N5344CE3/TR12.
What does the "TR12" suffix indicate in 1N5344CE3/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format supports automated pick-and-place assembly and is distinct from bulk or ammo-pack options. The "e3" portion confirms RoHS compliance with matte-tin lead plating, while "C" specifies ±2% voltage tolerance-making the full designation 1N5344CE3/TR12 a RoHS-compliant, precision-tolerance, high-volume production variant of the 1N5344 Zener diode.
How is thermal management handled for the 1N5344CE3/TR12 at full 5 W dissipation?
At full 5 W, the 1N5344CE3/TR12 requires thermal management via lead conduction: its 25 °C/W junction-to-lead resistance assumes 3/8″ (10 mm) lead length from the epoxy body. Mounting on FR4 with 4 mm² copper pads yields 85 °C/W junction-to-ambient, limiting usable power to ~1.47 W at 25°C ambient. For 5 W operation, external heatsinking or chassis connection to the leads is necessary to maintain junction temperature below 150°C.
Is the 1N5344CE3/TR12 suitable for automotive applications?
The 1N5344CE3/TR12 operates across –65°C to +150°C and meets MIL-PRF-19500 screening levels when ordered with MQ/MX/MV prefixes-but the base 1N5344CE3/TR12 is not AEC-Q200 qualified. For automotive use, it may serve in non-safety-critical subsystems (e.g., infotainment power rails) with proper derating and validation, but AEC-Q200-compliant alternatives like the BZX84-C8V2LT1G should be preferred for qualified applications.
1N5344CE3/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):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.9 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
1N5344CE3/TR12 FAQ
1.How can I place an order for 1N5344CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5344CE3/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 1N5344CE3/TR12 reliable?
The price and inventory of 1N5344CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5344CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5344CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5344CE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5344CE3/TR12?
1N5344CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5344CE3/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 1N5344CE3/TR12?
For technical support, including 1N5344CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5344CE3/TR12 requirements.
6.How does Aetrix verify that 1N5344CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5344CE3/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 1N5344CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5344CE3/TR12?
All 1N5344CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5344CE3/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 1N5344CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5344CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5344CE3/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
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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