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Microchip Technology 1N5351BE3/TR12
- Part No.:
- 1N5351BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351BE3/TR12.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,004
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Product details
Overview
1N5351BE3/TR12 from Microsemi is a silicon 5 W axial-leaded Zener diode with nominal regulation voltage of 14 V, ±5% tolerance (B suffix), 2.5 Ω maximum dynamic impedance at 100 mA test current, 100 mA maximum Zener current (IZM), and 0.25 V maximum voltage regulation (ΔVZ) across 10–50% IZM. It regulates voltage in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5351BE3/TR12 datasheet, 1N5351BE3/TR12 pinout, 1N5351BE3/TR12 application, or 1N5351BE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.7 A), low knee impedance (430 Ω at 1 mA), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a voltage reference by maintaining stable reverse-bias conduction above its 14 V breakdown threshold, with minimal voltage variation (≤0.25 V) between 10% and 50% of its 100 mA rated Zener current. Its 25 °C/W thermal resistance enables reliable 5 W dissipation when leads are mounted ≥10 mm from body.
The 1N5351BE3/TR12 exhibits 2.5 Ω dynamic impedance at 100 mA, 430 Ω knee impedance at 1 mA, and withstands 6.7 A non-repetitive 8.3 ms half-sine surge current. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% - precise DC reference for feedback loops and clamp thresholds |
| Power Dissipation | 5.0 W at TL = 25 °C - requires ≥10 mm lead length from body for full rating |
| Dynamic Impedance (ZZ) | 2.5 Ω max @ IZT = 100 mA - ensures tight regulation under load transients |
| Max Reverse Current (IR) | 1.0 μA @ VR = 10.1 V - low leakage preserves accuracy in high-impedance bias networks |
| Surge Current (IZSM) | 6.7 A peak (8.3 ms half-sine) - handles transient overvoltage without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - enables direct heat sinking via PCB traces or chassis mounting |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 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 | Connected to circuit ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal | Banded end; connected to regulated voltage node - reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB mechanical and electrical specifications |
| RoHS-compliant (e3) | Matte-tin plating meets EU RoHS Directive 2011/65/EU and J-STD-609A Class 1 |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow - simplifies SMT assembly prep |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 - robust handling in production |
| High surge capability | 6.7 A 8.3 ms half-sine surge current - protects downstream circuitry from line transients |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 14 V setpoint for error amplifier input. Use Value: Maintains ±5% output regulation across 10–100 mA load range with <0.25 V drift. |
Use Scenario: Protecting microcontroller I/O pins or analog sensor inputs from ESD or inductive kickback. IC Role / Device Role / Timing Role: Clamping transient voltages to ≤14.25 V (VZ + ΔVZ) before they reach sensitive nodes. Use Value: Absorbs 6.7 A surge energy without degradation, preserving system reliability. |
| DC-DC Converter Feedback | Industrial Sensor Excitation |
Use Scenario: Setting output voltage in isolated flyback or forward converters using optocoupler feedback. IC Role / Device Role / Timing Role: Precision Zener reference on secondary side defining regulated output via TL431 or similar comparator. Use Value: Enables 14 V reference stability over -65 °C to +150 °C ambient with <2.5 Ω dynamic impedance. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or strain gauges. IC Role / Device Role / Timing Role: Low-drift 14 V source minimizing measurement error in Wheatstone bridge configurations. Use Value: Delivers <1.0 μA leakage at 10.1 V, preventing bias current errors in high-impedance sensor interfaces. |
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 (non-e3) | Same electrical specs but SnPb-plated leads; not RoHS-compliant | Restricted to legacy industrial or military programs allowing Pb | Select only if RoHS exemption applies and tin-lead solder process is used |
| SMBJ5351B | Surface-mount SMB package; identical 14 V ±5%, 5 W rating, but 100 °C/W junction-to-ambient | Requires PCB layout change; unsuitable for through-hole prototyping or high-power heatsinking | Choose for automated assembly where board space is constrained and thermal management uses copper pour |
Compared with 1N5351BE3/TR12, the 1N5351B lacks RoHS compliance and requires Pb-based solder, while SMBJ5351B trades axial-leaded serviceability and superior thermal resistance (25 vs. 100 °C/W) for surface-mount compatibility - neither is pin-compatible due to differing form factors.
Availability
1N5351BE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and DC-DC converter feedback applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5351BE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N53xxB series delivers rugged, JEDEC-standard 5 W Zener regulation for mission-critical voltage reference and protection functions across extreme temperature and surge environments.
FAQ
What is the Zener voltage tolerance of the 1N5351BE3/TR12?
The 1N5351BE3/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's datasheet. This means its nominal 14 V regulation falls within 13.3 V to 14.7 V at 25 °C with 100 mA test current. The e3 suffix indicates RoHS compliance but does not affect voltage tolerance.
Can the 1N5351BE3/TR12 be used in surface-mount designs?
No - the 1N5351BE3/TR12 is an axial-leaded T-18 package intended for through-hole mounting. For surface-mount equivalents, Microsemi specifies SMBJ5351B (SMB package) or SMBG5351B (SMBG package). These share identical electrical specs but require different PCB footprints and thermal design due to higher junction-to-ambient resistance.
What is the maximum steady-state power dissipation of the 1N5351BE3/TR12 on a standard FR4 PCB?
When mounted on FR4 with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm trace, the 1N5351BE3/TR12 delivers 1.47 W steady-state power at 25 °C ambient - derived from its 85 °C/W junction-to-ambient thermal resistance. Full 5 W operation requires lead temperature control at ≤25 °C, achieved via ≥10 mm lead length from body.
Does the 1N5351BE3/TR12 meet MIL-PRF-19500 screening requirements?
No - the 1N5351BE3/TR12 carries no prefix (e.g., MQ, MX, MV) indicating MIL-PRF-19500 screening. It is a commercial-grade part. For JAN, JANTX, or JANTXV versions, Microsemi specifies prefixes added to the base number (e.g., MQ1N5351B), which undergo additional environmental and reliability testing beyond standard JEDEC requirements.
What is the reverse leakage current specification for the 1N5351BE3/TR12?
The 1N5351BE3/TR12 has a maximum reverse leakage current (IR) of 1.0 μA when tested at 10.1 V - the specified VR for B-suffix devices. This low leakage ensures minimal error in high-impedance reference circuits and supports stable operation in battery-powered or low-power sensor interfaces.
1N5351BE3/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:
- ±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/TR12 FAQ
1.How can I place an order for 1N5351BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351BE3/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 1N5351BE3/TR12 reliable?
The price and inventory of 1N5351BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5351BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351BE3/TR12 transactions.
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4.How is shipping managed for 1N5351BE3/TR12?
1N5351BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351BE3/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 1N5351BE3/TR12?
For technical support, including 1N5351BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351BE3/TR12 requirements.
6.How does Aetrix verify that 1N5351BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5351BE3/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 1N5351BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5351BE3/TR12?
All 1N5351BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351BE3/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 1N5351BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5351BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351BE3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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