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Microchip Technology 1N5351CE3/TR12
- Part No.:
- 1N5351CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351CE3/TR12.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,700
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Product details
Overview
1N5351CE3/TR12 from Microsemi is a 14 V, ±2% tolerance, 5 W axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers 100 mA maximum Zener current (IZM), 2.5 Ω dynamic impedance (ZZ) at 100 mA test current, and operates across –65°C to +150°C.
For engineers reviewing the 1N5351CE3/TR12 datasheet, 1N5351CE3/TR12 pinout, 1N5351CE3/TR12 application, or 1N5351CE3/TR12 equivalent, key selection criteria include its tight ±2% VZ tolerance (C suffix), RoHS-compliant matte-tin plating, tape-and-reel packaging (TR12), and verified 5 W steady-state dissipation with adequate heat sinking.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown. Its Zener voltage is specified at 25°C lead temperature (TL), with measurement performed within 40±10 ms after DC current application. Voltage regulation (ΔVZ = 0.25 V) is defined as the difference between voltages measured at 10% and 50% of IZM.
Thermal performance is characterized by 25°C/W junction-to-lead resistance at 3/8" (10 mm) lead length, enabling stable operation up to 150°C junction temperature. The device exhibits low dynamic knee impedance (ZZK = 500 Ω @ 1.0 mA) and withstands non-recurrent 8.3 ms half-sine surge currents up to 6.7 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V ±2% - precise reference for feedback networks requiring stable setpoints under varying load/temperature. |
| Power Dissipation (Pd) | 5.0 W at TL < 25°C - supports high-current regulation when mounted with 10 mm lead length from body. |
| Zener Test Current (IZT) | 100 mA - standardized bias point for VZ and ZZ measurement; aligns with typical regulator loop current levels. |
| Dynamic Impedance (ZZ) | 2.5 Ω @ IZT - ensures minimal output voltage variation under dynamic load transients in power supply designs. |
| Max Reverse Current (IR) | 1.0 µA @ VR = 10.1 V - guarantees low leakage in high-impedance reference paths and standby circuits. |
| Surge Current (IZSM) | 6.7 A (8.3 ms half-sine) - provides robust transient overvoltage clamping without degradation. |
| Operating Temperature | –65°C to +150°C - suitable for industrial, automotive, and aerospace environments with wide thermal excursions. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL standard; void-free UL94V-0 epoxy body; cathode indicated by 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-biased operation requires cathode at higher potential. |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to voltage rail being regulated or clamped; defines reference potential for feedback networks. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables accurate voltage setting without post-manufacture trimming in precision power supplies and analog references. |
| RoHS-compliant e3 marking | Meets global environmental compliance requirements without compromising electrical or thermal performance. |
| Tape-and-reel packaging (TR12) | Supports automated SMT placement compatibility despite axial-leaded form factor via carrier tape handling. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for immediate assembly without baking. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for special ESD controls during board assembly. |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loops using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Provides stable 14 V reference for TL431-type shunt regulators or direct feedback to PWM controller sensing inputs. Use Value: Tight ±2% VZ tolerance maintains output accuracy within ±1% over line/load/temperature, reducing need for system-level calibration. |
Use Scenario: Clamps transient surges on 12 V automotive or industrial bus lines exceeding safe operating limits. IC Role / Device Role / Timing Role: Acts as passive crowbar element diverting excess energy to ground before downstream ICs reach absolute maximum ratings. Use Value: 6.7 A surge rating and low ΔVZ (0.25 V) ensure reliable clamping without thermal runaway during repeated 8.3 ms transients. |
| Programmable Voltage Reference | DC-DC Converter Trim Circuit |
Use Scenario: Sets adjustable output voltage in lab-grade bench power supplies using series-pass transistor and op-amp control. IC Role / Device Role / Timing Role: Serves as primary reference source for DAC-controlled voltage programming; buffered by op-amp follower. Use Value: Low ZZ (2.5 Ω) and minimal VZ drift over temperature enable <0.05% output stability across –40°C to +85°C ambient. |
Use Scenario: Fine-tunes nominal output of fixed 12 V DC-DC modules in telecom or server applications where ±5% factory tolerance is insufficient. IC Role / Device Role / Timing Role: Connected in series with trim resistor network to adjust feedback divider ratio dynamically. Use Value: 14 V VZ allows precise 12 V output adjustment range (±10%) while maintaining sufficient headroom for feedback amplifier common-mode range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | ±5% VZ tolerance (B suffix) vs. ±2% (C suffix); otherwise identical electrical specs and package. | Acceptable where system-level calibration compensates for initial tolerance; not suitable for uncalibrated precision references. | Select 1N5351B only if cost sensitivity outweighs need for tighter initial accuracy. |
| MMSZ5241ET1G | Surface-mount SOD-123 package (2.5 W rating); 14 V ±5%; 17 Ω ZZ @ 20 mA; 100 mA IZM derated from 2.5 W. | Limited to low-power, space-constrained PCBs; unsuitable for 5 W continuous dissipation or high-surge environments. | Choose MMSZ5241ET1G only for compact consumer electronics where thermal mass and surge immunity are secondary. |
Compared with 1N5351B and MMSZ5241ET1G, the 1N5351CE3/TR12 uniquely combines ±2% tolerance, 5 W power handling, axial-leaded mechanical robustness, and TR12 automation readiness-making it optimal for industrial power systems requiring long-term stability without recalibration.
Availability
1N5351CE3/TR12 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage protection clamp, and programmable voltage reference applications requiring stable component supply, consistent parametric performance, and full RoHS compliance.
Supply support for 1N5351CE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB/C/D series was designed specifically for ruggedized voltage regulation in mission-critical power systems where long-term stability, surge resilience, and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5351CE3/TR12?
The 1N5351CE3/TR12 has a Zener voltage tolerance of ±2%, indicated by the "C" suffix in its part number. This is confirmed in the Electrical Characteristics table on page 2 of the Microsemi datasheet, where 1N5351B/C/D variants are explicitly differentiated by tolerance: B = ±5%, C = ±2%, D = ±1%. The 14.0 V nominal VZ is therefore guaranteed between 13.72 V and 14.28 V at 25°C lead temperature.
Does the 1N5351CE3/TR12 require dry packing or baking before PCB assembly?
No, the 1N5351CE3/TR12 does not require dry packing or baking prior to assembly. Its moisture sensitivity level is rated IPC/JEDEC J-STD-020B Level 1, meaning it is exempt from moisture-related handling restrictions. This is stated in the Features section of the datasheet and confirmed in the Mechanical and Packaging section, which notes "no dry pack required."
What is the maximum surge current rating for the 1N5351CE3/TR12?
The 1N5351CE3/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 6.7 A. This value corresponds to a single 8.3 ms half-sine waveform, as defined in Note 5 of the datasheet. It reflects the device's ability to absorb transient energy without failure, critical for overvoltage protection applications.
How is the voltage regulation (ΔVZ) defined for the 1N5351CE3/TR12?
Voltage regulation (ΔVZ) for the 1N5351CE3/TR12 is defined as the difference between the Zener voltage measured at 10% and 50% of the maximum Zener current (IZM). Per Note 6 in the datasheet, this yields ΔVZ = 0.25 V - a measure of how tightly the device maintains its VZ across its operational current range, directly impacting regulation accuracy in variable-load conditions.
Is the 1N5351CE3/TR12 compatible with lead-free reflow soldering processes?
Yes, the 1N5351CE3/TR12 supports lead-free soldering with a maximum peak temperature of 260°C for 10 seconds, as specified in the Mechanical and Packaging section. Its RoHS-compliant matte-tin plating (e3 suffix) and UL94V-0 epoxy body are qualified for standard Pb-free reflow profiles used in modern electronics manufacturing.
1N5351CE3/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):
- 14 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.1 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
1N5351CE3/TR12 FAQ
1.How can I place an order for 1N5351CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351CE3/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 1N5351CE3/TR12 reliable?
The price and inventory of 1N5351CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5351CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351CE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351CE3/TR12?
1N5351CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351CE3/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 1N5351CE3/TR12?
For technical support, including 1N5351CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351CE3/TR12 requirements.
6.How does Aetrix verify that 1N5351CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5351CE3/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 1N5351CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5351CE3/TR12?
All 1N5351CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351CE3/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 1N5351CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5351CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351CE3/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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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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