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Microchip Technology 1N5351BE3/TR8
- Part No.:
- 1N5351BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351BE3/TR8.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,834
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Product details
Overview
1N5351BE3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 14 V, ±5% tolerance (B suffix), 2.5 Ω maximum dynamic impedance at 100 mA test current, and 340 Ω maximum knee impedance at 1 mA. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5351BE3/TR8 datasheet, 1N5351BE3/TR8 pinout, 1N5351BE3/TR8 application, or 1N5351BE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.7 A), reverse leakage performance at 10.1 V, 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, maintaining stable output across wide current ranges (100 mA IZT to 6.7 A IZSM peak). Its low 25 °C/W thermal resistance enables high steady-state power dissipation when leads are mounted at 3/8″ (10 mm) from body.
It exhibits minimal voltage variation (ΔVZ = 0.25 V) between 10% and 50% of maximum Zener current and maintains tight regulation under transient surges per 8.3 ms half-sine waveform standard. Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% - defines regulated output level under 100 mA test current at 25 °C lead temperature |
| Power Dissipation | 5.0 W at TL = 25 °C - maximum continuous DC power with adequate heat sinking at 3/8″ lead length |
| Dynamic Impedance (ZZ) | 2.5 Ω max @ 100 mA - ensures minimal output voltage shift during load current changes |
| Max Reverse Leakage (IR) | 1.0 µA @ 10.1 V - guarantees low standby power loss in voltage reference circuits |
| Surge Current (IZSM) | 6.7 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Junction-to-Lead Rθ | 25 °C/W - enables thermal design with predictable temperature rise under full power |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; referenced ground node in Zener regulation | Connected to lower-potential side of circuit; determines polarity of regulation path |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Banded end; must be held at higher potential than anode to activate Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with matte-tin plating-no lead or hazardous substances |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands handling without special static control-reduces manufacturing yield risk |
| High surge current capability | 6.7 A non-recurrent peak supports robust input-stage transient suppression |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing unregulated 18 V DC rail to fixed 14 V for analog sensor biasing in industrial PLC modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing passive regulation independent of load current variation. Use Value: Maintains ±0.25 V regulation across 10–100 mA load range while dissipating up to 5 W without heatsink due to low thermal resistance. | Use Scenario: Clamping induced transients on 12 V automotive control bus during load dump events. IC Role / Device Role / Timing Role: Standby-mode surge suppressor activated only above 14 V threshold, diverting excess energy to ground. Use Value: Withstands 6.7 A 8.3 ms surge without degradation-meets ISO 7637-2 Pulse 5a requirements when properly fused. |
| Reference Voltage Source | Field-Programmable Gate Array (FPGA) Configuration |
Use Scenario: Generating precise 14 V reference for ADC calibration in medical instrumentation front-end. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source feeding precision resistor divider network. Use Value: Delivers <1 µA leakage at 10.1 V and 2.5 Ω dynamic impedance-minimizes reference error contribution. | Use Scenario: Providing stable 14 V programming voltage to FPGA configuration PROM during power-up sequencing. IC Role / Device Role / Timing Role: Pre-regulator ensuring clean, undervoltage-free supply to nonvolatile memory interface. Use Value: Operates reliably from –65 °C to +150 °C-supports extended-temperature FPGA deployments in aerospace avionics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B (non-e3) | Same electrical specs but SnPb lead finish; not RoHS compliant | Restricted to legacy military/aerospace programs requiring Pb-based solder compatibility | Select only if exempt from RoHS or operating in Pb-solder reflow environment |
| MMSZ5241ET1G | Surface-mount SOD-123 package; 14 V ±5%, 500 mW rating; 30 Ω ZZ | Lower power, smaller footprint-suitable for space-constrained PCBs but not 5 W thermal loads | Choose for compact consumer electronics where power dissipation ≤0.5 W suffices |
Compared with 1N5351BE3/TR8, the 1N5351B offers identical regulation performance but lacks RoHS compliance, while MMSZ5241ET1G trades power handling and thermal robustness for miniaturization-making it unsuitable for high-current or high-temperature environments where 1N5351BE3/TR8 excels.
Availability
1N5351BE3/TR8 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and precision reference voltage sources requiring stable component supply across industrial, automotive, and medical electronics programs.
Supply support for 1N5351BE3/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, high-power Zener regulation in harsh-environment systems-emphasizing thermal stability, surge resilience, and long-term parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5351BE3/TR8?
The 1N5351BE3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 14 V regulation point falls within 13.3 V to 14.7 V at 25 °C lead temperature with 100 mA test current. The tolerance remains stable across its full operating temperature range of –65 °C to +150 °C, supporting consistent performance in demanding environments where the 1N5351BE3/TR8 is deployed.
Does the 1N5351BE3/TR8 require a heatsink for 5 W operation?
The 1N5351BE3/TR8 achieves its rated 5.0 W power dissipation only when leads are mounted at 3/8″ (10 mm) from the body, achieving a junction-to-lead thermal resistance of 25 °C/W. No external heatsink is required under this condition. However, at ambient mounting (e.g., on FR4 board), its steady-state rating drops to 1.47 W-so heatsinking or lead-length optimization is essential to sustain full 5 W operation with the 1N5351BE3/TR8.
What does the "e3" and "TR8" suffix mean in 1N5351BE3/TR8?
The "e3" suffix indicates RoHS-compliant matte-tin plating per JEDEC J-STD-609, replacing traditional tin-lead finishes. The "TR8" denotes tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape and 1,000 units per reel. Together, 1N5351BE3/TR8 specifies a lead-free, automated-assembly-ready version of the 14 V Zener diode-critical for modern high-volume manufacturing where the 1N5351BE3/TR8 is integrated into production lines.
Can the 1N5351BE3/TR8 be used in place of a 1N4742A?
No-the 1N5351BE3/TR8 (14 V, 5 W) and 1N4742A (12 V, 1 W) differ in both Zener voltage and power rating. Substituting them risks under-regulation (voltage too low) or thermal failure (exceeding 1 W dissipation). While both are axial Zeners, the 1N5351BE3/TR8 is not a drop-in replacement for the 1N4742A. Always verify voltage match, power derating, and thermal layout before using the 1N5351BE3/TR8 as an alternative.
What is the maximum reverse leakage current for the 1N5351BE3/TR8?
The maximum reverse leakage current (IR) for the 1N5351BE3/TR8 is 1.0 µA when tested at 10.1 V-its specified VR for B-suffix devices. This low leakage ensures minimal quiescent current draw in battery-powered or low-power reference applications, preserving system efficiency. The value is guaranteed across the full –65 °C to +150 °C operating range and is confirmed per JEDEC test conditions documented in the official 1N5351BE3/TR8 datasheet.
1N5351BE3/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:
- ±5%
- 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
1N5351BE3/TR8 FAQ
1.How can I place an order for 1N5351BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351BE3/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 1N5351BE3/TR8 reliable?
The price and inventory of 1N5351BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5351BE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351BE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351BE3/TR8?
1N5351BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351BE3/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 1N5351BE3/TR8?
For technical support, including 1N5351BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351BE3/TR8 requirements.
6.How does Aetrix verify that 1N5351BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5351BE3/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 1N5351BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5351BE3/TR8?
All 1N5351BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351BE3/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 1N5351BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5351BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351BE3/TR8 Tags
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