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Microchip Technology 1N5346E3/TR13
- Part No.:
- 1N5346E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346E3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,942
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Product details
Overview
1N5346E3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 9.1 V, ±5% tolerance (B-suffix equivalent), 150 mA maximum Zener current (IZM), 2.0 Ω dynamic impedance (ZZ), and 7.5 μA reverse leakage at 6.9 V. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5346E3/TR13 datasheet, 1N5346E3/TR13 pinout, 1N5346E3/TR13 application, or 1N5346E3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (520 A), voltage regulation (ΔVZ = 0.22 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse-biased breakdown mode. Its Zener voltage is specified at 150 mA test current (IZT), with dynamic impedance measured at 1 kHz AC superimposed on DC bias - confirming stable regulation under varying load conditions.
Thermal design relies on lead-length-dependent junction-to-lead resistance (25 °C/W at 3/8″ lead length) rather than ambient-based dissipation; it delivers 5.0 W steady-state power only when leads are adequately heat-sunk, dropping to 1.47 W on standard FR4 PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% - defines regulated output level in shunt reference circuits |
| Power Dissipation (PD) | 5.0 W at TL = 25°C - requires mechanical heat sinking via leads for full rating |
| Test Current (IZT) | 150 mA - operating point where VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 2.0 Ω - low AC resistance ensures minimal output voltage variation with current changes |
| Reverse Leakage (IR) | 7.5 μA at 6.9 V - confirms sharp knee and low standby loss below regulation threshold |
| Surge Current (IZSM) | 520 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 0.22 V - difference between VZ 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 band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to circuit ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Banded end; connected to unregulated input rail to clamp voltage at 9.1 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB family mechanical and electrical definitions |
| 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 capability | 520 A peak (8.3 ms) - enables reliable transient suppression without derating |
| e3 RoHS-compliant plating | Matte-tin termination meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 |
Applications
| Switching Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides stable 9.1 V reference for optocoupler-based feedback in offline AC/DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference regulating TL431 bias or directly setting error amplifier trip point. Use Value: Maintains ±0.22 V regulation across 15–75 mA load range, ensuring consistent output voltage accuracy despite line/load variation. | Use Scenario: Supplies excitation voltage to bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision analog reference source replacing higher-cost IC references where 1% absolute accuracy is not required. Use Value: Delivers 9.1 V ±5% with <2.0 Ω dynamic impedance, minimizing sensor output drift due to supply variation. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Clamps 12 V rail surges above 9.1 V in automotive body control modules during load dump events. IC Role / Device Role / Timing Role: Passive crowbar element absorbing transient energy before downstream ICs reach breakdown. Use Value: Withstands 520 A surge (8.3 ms) and dissipates 5 W continuously when heatsunk - prevents latch-up in microcontrollers. | Use Scenario: Sets trigger threshold for comparator-based battery undervoltage lockout in portable medical devices. IC Role / Device Role / Timing Role: Stable DC reference input to LM393 comparator enabling repeatable 9.1 V trip point. Use Value: Low 7.5 μA leakage at 6.9 V ensures negligible current draw in sleep mode; tight ΔVZ guarantees <0.5% hysteresis error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same 9.1 V ±5%, identical electrical specs, but SnPb (non-RoHS) plating | Not suitable for RoHS-compliant production; requires exemption documentation | Select 1N5346E3/TR13 for new designs requiring lead-free compliance and tape-and-reel packaging |
| SMBJ5346B | Surface-mount SMB package; same 9.1 V ±5%, but lower surge rating (200 A vs. 520 A) and higher thermal resistance (100 °C/W) | Used where board space is constrained and thermal management uses PCB copper area instead of lead heatsinking | Choose SMBJ5346B only if layout prohibits axial leads and surge stress is below 200 A |
Compared with 1N5346B and SMBJ5346B, the 1N5346E3/TR13 offers RoHS compliance, tape-and-reel delivery, and superior surge robustness - making it optimal for industrial power supplies requiring long-term reliability and regulatory alignment.
Availability
1N5346E3/TR13 is available at Aetrix Electronics and suitable for switching power supplies, industrial sensor references, overvoltage clamp protection, and programmable threshold detectors requiring stable component supply and full RoHS compliance.
Supply support for 1N5346E3/TR13 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized, high-power axial Zener platform delivering stable voltage regulation from 3.3 V to 200 V with military-grade screening options and broad thermal performance.
FAQ
What is the Zener voltage tolerance of the 1N5346E3/TR13?
The 1N5346E3/TR13 has a nominal Zener voltage of 9.1 V with ±5% tolerance, consistent with the "B" suffix in the 1N53xxB family. This tolerance is verified at 150 mA test current and 25°C lead temperature, and applies across the full operating temperature range of –65°C to +150°C.
Does the 1N5346E3/TR13 require dry packing before reflow soldering?
No, the 1N5346E3/TR13 has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 rating, meaning it is not moisture-sensitive and does not require dry packing or baking prior to surface mount assembly. Its void-free epoxy encapsulation ensures robustness during standard reflow profiles up to 260°C for 10 seconds.
What is the maximum continuous power dissipation for the 1N5346E3/TR13 on a standard PCB?
When mounted on an FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5346E3/TR13 is rated for 1.47 W steady-state power at 25°C ambient. Full 5.0 W operation requires heatsinking via 3/8″ (10 mm) lead length, achieving 25 °C/W junction-to-lead thermal resistance.
How does the 1N5346E3/TR13 compare to the 1N5346B in terms of plating and compliance?
The 1N5346E3/TR13 uses RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026, while the 1N5346B uses traditional tin-lead (SnPb) plating. The "e3" suffix explicitly denotes RoHS compliance, and "TR13" indicates EIA-296 tape-and-reel packaging - both critical for modern automated assembly and environmental certification.
Can the 1N5346E3/TR13 be used as a direct replacement for 1N5346B in existing designs?
Yes, the 1N5346E3/TR13 is electrically and mechanically identical to the 1N5346B except for plating and packaging: both share the same 9.1 V ±5% Zener voltage, 2.0 Ω dynamic impedance, 520 A surge rating, and T-18 axial package dimensions. No PCB layout change is needed - only process validation for lead-free soldering.
1N5346E3/TR13 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):
- 9.1 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 6.6 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
1N5346E3/TR13 FAQ
1.How can I place an order for 1N5346E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346E3/TR13 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 1N5346E3/TR13 reliable?
The price and inventory of 1N5346E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5346E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346E3/TR13?
1N5346E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346E3/TR13 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 1N5346E3/TR13?
For technical support, including 1N5346E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346E3/TR13 requirements.
6.How does Aetrix verify that 1N5346E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5346E3/TR13 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 1N5346E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5346E3/TR13?
All 1N5346E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346E3/TR13, 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 1N5346E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5346E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346E3/TR13 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
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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