My Inquiry
My Account
Microchip Technology 1N5351/TR12
- Part No.:
- 1N5351/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351/TR12.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,560
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5351/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 14 V, ±5% tolerance (B suffix), 2.5 Ω maximum dynamic impedance at 100 mA test current, and 6.7 A 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 DC power supplies.
For engineers reviewing the 1N5351/TR12 datasheet, 1N5351/TR12 pinout, 1N5351/TR12 application, or 1N5351/TR12 equivalent, key selection considerations include its 14 V Zener voltage, 5 W steady-state power rating at 25 °C lead temperature, low 2.5 Ω dynamic impedance, 1.0 μA reverse leakage at 10.1 V, and axial T-18 package with cathode band polarity marking.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage under varying load and line conditions. Its Zener voltage is specified at 100 mA test current (IZT) with measurement performed within 40 ±10 ms after DC current application, per JEDEC registration.
Thermal performance is defined by 25 °C/W junction-to-lead resistance at 10 mm lead length, enabling high-current operation with appropriate heat sinking. The device exhibits 0.25 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, confirming tight regulation stability across operating current range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% - precise regulation point for 12–15 V rail stabilization |
| Test Current (IZT) | 100 mA - standardized bias condition for VZ and ZZ measurement |
| Dynamic Impedance (ZZ) | 2.5 Ω max - low AC resistance ensures minimal voltage shift under load transients |
| Max Reverse Current (IR) | 1.0 μA at 10.1 V - confirms sharp knee and low leakage below regulation threshold |
| Max Zener Current (IZM) | 6.7 A - peak DC current capability with adequate heat sinking at TL = 25 °C |
| Power Dissipation | 5.0 W at TL < 25 °C - defines thermal design boundary for lead-mounted operation |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), cathode indicated by color band; leads are tin-lead or RoHS-compliant matte tin plating, 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 applied to cathode |
| 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 |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series definition for interchangeability and testing |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - robust against electrostatic discharge during handling |
| High surge current rating | 6.7 A non-repetitive half-sine surge (8.3 ms) - supports transient overvoltage clamping |
| Low thermal resistance | 25 °C/W junction-to-lead - enables high-power operation with minimal heatsinking on leads |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing unregulated 15–18 V input to deliver clean 14 V reference for analog sensor biasing. IC Role / Device Role / Timing Role: Two-terminal shunt voltage regulator providing passive feedback control loop. Use Value: Maintains ±0.25 V regulation across 1–6.7 A load range, minimizing sensor offset drift due to supply variation. |
Use Scenario: Clamping transient spikes on 12 V automotive accessory bus during load dump events. IC Role / Device Role / Timing Role: Standby shunt protector activated only above 14 V threshold. Use Value: Absorbs up to 5 W continuously and 6.7 A surges without degradation, preventing downstream IC damage. |
| Programmable Reference Source | Industrial Control Signal Conditioning |
Use Scenario: Generating stable 14 V reference for DAC output scaling in PLC analog output modules. IC Role / Device Role / Timing Role: Precision voltage reference element in resistor-divider feedback network. Use Value: Delivers 14 V ±0.7 V over –40 °C to +85 °C ambient, meeting industrial-grade accuracy requirements. |
Use Scenario: Biasing op-amp input stages in 4–20 mA transmitter circuits operating in harsh factory environments. IC Role / Device Role / Timing Role: Local rail stabilizer ensuring consistent amplifier common-mode range. Use Value: Withstands 150 °C storage and –65 °C operating extremes while maintaining regulation integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B (bulk) | Same electrical specs, no tape-and-reel packaging | Lacks TR12 carrier tape format; unsuitable for automated pick-and-place | Select when manual assembly or low-volume prototyping is used |
| SMBJ5351B | Surface-mount SMB package; same 14 V/5 W rating but 85 °C/W junction-to-ambient thermal resistance | Requires PCB layout change; lower power derating on FR4 vs. axial lead mounting | Select for space-constrained designs where automated SMT placement is mandatory |
Compared with 1N5351/TR12, the bulk 1N5351B offers identical regulation performance but lacks tape-and-reel convenience, while SMBJ5351B provides SMT compatibility at the cost of reduced thermal efficiency and altered board-level power handling.
Availability
1N5351/TR12 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and programmable reference source applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1N5351/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, high-stability voltage regulation in mission-critical power systems where wide temperature operation and surge resilience are essential.
FAQ
What is the Zener voltage tolerance of 1N5351/TR12?
The 1N5351/TR12 has a ±5% Zener voltage tolerance, indicated by the "B" suffix in its part number. This means its nominal 14 V regulation point falls between 13.3 V and 14.7 V at 100 mA test current and 25 °C lead temperature, per JEDEC-registered specifications in the Microsemi datasheet.
Can 1N5351/TR12 be used without a heatsink?
Yes, 1N5351/TR12 can operate without an external heatsink at power levels ≤1.47 W when mounted on a standard FR4 PCB with 4 mm² copper pads and 1 mm track width, as defined by its 85 °C/W junction-to-ambient thermal resistance. Full 5 W dissipation requires maintaining lead temperature below 25 °C via heatsinking or short lead lengths.
What does the "TR12" suffix mean in 1N5351/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12 mm tape width and component spacing optimized for automated surface-mount assembly equipment. This format enables high-speed pick-and-place placement and is distinct from bulk or ammo-pack variants of the same 1N5351B die.
Is 1N5351/TR12 RoHS compliant?
Yes, 1N5351/TR12 is RoHS compliant, confirmed by the "e3" designation in Microsemi's official documentation. Its leads use annealed matte-tin plating instead of tin-lead, and the void-free epoxy body meets UL94V-0 flammability requirements without hazardous substances.
How does the voltage regulation (ΔVZ) specification impact circuit design with 1N5351/TR12?
The 0.25 V maximum ΔVZ for 1N5351/TR12-defined as the difference between Zener voltage measured at 10% and 50% of IZM-ensures predictable, linear regulation behavior across its operating current range. This allows designers to model output variation accurately in feedback networks and avoid unexpected shifts during load transitions.
1N5351/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:
- ±20%
- 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
1N5351/TR12 FAQ
1.How can I place an order for 1N5351/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351/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 1N5351/TR12 reliable?
The price and inventory of 1N5351/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5351/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351/TR12?
1N5351/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351/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 1N5351/TR12?
For technical support, including 1N5351/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351/TR12 requirements.
6.How does Aetrix verify that 1N5351/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5351/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 1N5351/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5351/TR12?
All 1N5351/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351/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 1N5351/TR12 part is unused and in its original packaging.
Return procedure for 1N5351/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351/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
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
