My Inquiry
My Account
Microchip Technology 1N5351E3/TR8
- Part No.:
- 1N5351E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351E3/TR8.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,038
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5351E3/TR8 from Microsemi is a 5 W, 14 V ±5% axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and precision reference applications. It delivers stable regulation at 100 mA test current with 2.5 Ω dynamic impedance, operates from –65°C to +150°C, and features RoHS-compliant matte-tin plating.
For engineers reviewing the 1N5351E3/TR8 datasheet, 1N5351E3/TR8 pinout, 1N5351E3/TR8 application, or 1N5351E3/TR8 equivalent, key selection criteria include its 14 V nominal Zener voltage, ±5% tolerance (B-suffix), 5.0 W steady-state power rating at 25°C lead temperature, low 2.5 Ω dynamic impedance, and compatibility with standard T-18 axial package mounting.
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining a stable 14 V across its cathode–anode terminals when reverse-biased above its breakdown threshold. Its regulation relies on controlled avalanche conduction, with voltage stability verified at 100 mA test current (IZT) and characterized by ΔVZ = 0.25 V between 10% and 50% of IZM.
The 1N5351E3/TR8 exhibits low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length), enabling high-current operation (IZM = 340 mA) with adequate heat sinking. Its moisture sensitivity level is IPC/JEDEC Level 1 - no dry pack required - and it withstands 8.3 ms non-recurring surge currents up to 6.7 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V ±5% at 100 mA - defines precise regulation setpoint for feedback or clamping |
| Power Dissipation (Pd) | 5.0 W at TL = 25°C (3/8″ lead length) - sets maximum continuous power handling with heatsinking |
| Dynamic Impedance (ZZ) | 2.5 Ω at IZT = 100 mA - ensures minimal output voltage variation under load current changes |
| Max Regulator Current (IZM) | 340 mA - maximum DC current before exceeding 5 W at worst-case VZ (14.7 V) |
| Reverse Leakage (IR) | 1.0 μA max at VR = 10.1 V - guarantees low standby power loss in high-impedance bias networks |
| Surge Current (IZSM) | 6.7 A peak (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Operating Temperature | –65°C to +150°C - enables use in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
Package: T-18 axial-leaded plastic case per JEDEC DO-204AL. Cathode identified by color band; banded end must be held positive relative to anode during regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to voltage source; maintains fixed 14 V relative to anode when reverse-biased |
| Anode (unbanded end) | Reference/return node | Typically tied to system ground or common rail; completes regulation current path |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and reliability testing across suppliers |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU with matte-tin plating - no lead or hazardous substances |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to PCB assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands human-body-model discharges without parameter shift or failure |
| High surge current capability | 6.7 A peak surge rating enables robust transient suppression in unregulated input stages |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in flyback or forward converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt reference providing precise 14 V threshold to control PWM duty cycle. Use Value: Maintains ±1% output accuracy over line/load/temperature with 2.5 Ω ZZ minimizing loop gain variation. |
Use Scenario: Clamps input rail to protect downstream LDOs or microcontrollers during load dump or surge events. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing excess energy above 14.7 V. Use Value: Withstands 6.7 A surge without degradation, preventing damage to 15 V-rated ICs. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Provides stable excitation voltage for resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Low-drift, low-noise reference source for Wheatstone bridge biasing. Use Value: ΔVZ = 0.25 V ensures <0.2% reference drift across operating current range, improving measurement resolution. |
Use Scenario: Supplies regulated bias to 4–20 mA current-loop sensor front-ends in harsh factory environments. IC Role / Device Role / Timing Role: Primary voltage stabilizer in analog signal conditioning stage. Use Value: –65°C to +150°C rating allows operation inside sealed enclosures exposed to ambient extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | No e3 RoHS suffix; tin-lead plating instead of matte-tin; identical electrical specs and T-18 package | Not compliant with RoHS Directive; requires exemption documentation for EU shipments | Select 1N5351B only for legacy designs requiring tin-lead solder compatibility or exempted military programs |
| MMSZ5241ET1G | Surface-mount SOD-123 package (2.7 × 1.6 mm); 14 V ±5%; 500 mW rating; higher ZZ (20 Ω) | Limited to low-power applications; unsuitable for >100 mA continuous regulation or surge suppression | Choose MMSZ5241ET1G only for space-constrained PCBs where 5 W dissipation is unnecessary |
Compared with 1N5351B and MMSZ5241ET1G, the 1N5351E3/TR8 uniquely combines RoHS compliance, 5 W power handling, axial through-hole mounting, and low 2.5 Ω impedance - making it the only option for high-reliability, high-current, environmentally compliant Zener regulation.
Availability
1N5351E3/TR8 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, and industrial sensor excitation systems requiring stable component supply and full RoHS compliance.
Supply support for 1N5351E3/TR8 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 series was designed specifically for ruggedized voltage regulation in mission-critical power systems, emphasizing wide temperature operation, surge resilience, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5351E3/TR8?
The 1N5351E3/TR8 has a nominal Zener voltage of 14.0 V with a tolerance of ±5%, as indicated by the "B" suffix in its base part number. This tolerance is verified at 100 mA test current and 25°C lead temperature. The e3 suffix denotes RoHS compliance but does not affect voltage specification. The 1N5351E3/TR8 maintains this tolerance across its full operating temperature range of –65°C to +150°C.
Can the 1N5351E3/TR8 be used in surface-mount designs?
No - the 1N5351E3/TR8 uses a T-18 axial-leaded package and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5351B (SMB package, 5 W) or MMSZ5241ET1G (SOD-123, 500 mW). The 1N5351E3/TR8 itself requires axial insertion and lead forming; attempting SMT reflow will damage the device due to thermal stress on the epoxy body and leads.
What is the maximum continuous current the 1N5351E3/TR8 can handle?
The 1N5351E3/TR8 supports a maximum DC Zener current (IZM) of 340 mA when adequately heat sunk - calculated as Pd/VZM = 5.0 W / 14.7 V (upper limit of ±5% tolerance). At ambient temperature (TA = 25°C) on FR4 board, derated power drops to 1.47 W, limiting usable current to ~100 mA without forced cooling. Full 340 mA requires TL ≤ 25°C at 10 mm lead length.
Does the 1N5351E3/TR8 require moisture preconditioning before reflow?
No - the 1N5351E3/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30°C/60% RH without baking or dry packing. This eliminates pre-reflow bake cycles and simplifies manufacturing logistics. The "e3" RoHS suffix confirms compliant plating that withstands standard 260°C/10 s solder profiles without delamination or voiding.
How does the 1N5351E3/TR8 compare to the 1N4742A?
The 1N5351E3/TR8 (14 V, 5 W, ±5%) differs from the 1N4742A (12 V, 1 W, ±5%) in voltage rating, power capacity, package, and regulation performance. The 1N5351E3/TR8 offers 5× higher power, lower dynamic impedance (2.5 Ω vs. 9 Ω), and superior surge rating (6.7 A vs. 1.2 A). They are not interchangeable: substituting 1N5351E3/TR8 for 1N4742A would overvolt a 12 V circuit, while substituting the reverse would fail under 5 W load conditions.
1N5351E3/TR8 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
1N5351E3/TR8 FAQ
1.How can I place an order for 1N5351E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351E3/TR8 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 1N5351E3/TR8 reliable?
The price and inventory of 1N5351E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5351E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351E3/TR8?
1N5351E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351E3/TR8 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 1N5351E3/TR8?
For technical support, including 1N5351E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351E3/TR8 requirements.
6.How does Aetrix verify that 1N5351E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5351E3/TR8 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 1N5351E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5351E3/TR8?
All 1N5351E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351E3/TR8, 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 1N5351E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5351E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351E3/TR8 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…
