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Microchip Technology 1N5346CE3/TR13
- Part No.:
- 1N5346CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346CE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,820
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Product details
Overview
1N5346CE3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 9.1 V, ±2% tolerance (C suffix), 150 mA maximum Zener current (IZM), 2.0 Ω dynamic impedance (ZZ) at 150 mA test current, and operates from –65 °C to +150 °C. It regulates voltage in power supply reference and overvoltage protection circuits where stable low-drift voltage references are required.
For engineers reviewing the 1N5346CE3/TR13 datasheet, 1N5346CE3/TR13 pinout, 1N5346CE3/TR13 application, or 1N5346CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, 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 reference operating in reverse breakdown mode. Its regulation performance is defined at 150 mA test current (IZT), with dynamic impedance measured at 1 kHz AC superimposed on DC bias, and voltage regulation (ΔVZ) specified as the difference between voltages at 10% and 50% of IZM.
The 1N5346CE3/TR13 uses a void-free thermosetting epoxy T-18 package rated for 5 W steady-state dissipation at 25 °C lead temperature, with thermal resistance of 25 °C/W junction-to-lead (3/8″ lead length) and 85 °C/W junction-to-ambient on FR4 board. 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) | 9.1 V ±2% - tight tolerance enables precision reference without trimming in feedback loops. |
| Test Current (IZT) | 150 mA - defines operating point for specified VZ and dynamic impedance. |
| Dynamic Impedance (ZZ) | 2.0 Ω at IZT - low impedance ensures minimal output voltage variation under load changes. |
| Max Regulator Current (IZM) | 520 mA - maximum continuous DC current at 25 °C lead temperature with adequate heat sinking. |
| Surge Current (IZSM) | 520 A (8.3 ms half-sine) - supports transient overvoltage clamping in protection circuits. |
| Voltage Regulation (ΔVZ) | 0.22 V - difference between VZ at 10% and 50% of IZM, indicating regulation linearity. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with known power derating above 25 °C. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, 0.7 g weight, cathode indicated by band, leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires this terminal negative relative to cathode. |
| Cathode | Regulated output node | Banded end; connected to regulated voltage rail; carries full Zener current during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables use in precision voltage references without external calibration or trimming components. |
| RoHS-compliant e3 suffix | Meets EU RoHS Directive 2011/65/EU with matte-tin plating and lead-free assembly compatibility. |
| JEDEC-registered 1N53xxB series | Guarantees standardized mechanical dimensions, marking, and electrical behavior across qualified suppliers. |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT reflow or manual assembly. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during assembly. |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing fixed 9.1 V reference point for error amplifier input. Use Value: ±2% tolerance and 0.22 V ΔVZ ensure output voltage accuracy remains within ±1% over load and temperature variations. | Use Scenario: Clamping transient surges on 12 V automotive or industrial control bus lines. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when bus voltage exceeds 9.1 V. Use Value: 520 A surge rating and 5 W steady-state dissipation enable reliable single-event clamping without degradation. |
| DC-DC Converter Feedback Divider | Instrumentation Reference Source |
Use Scenario: Setting output voltage in isolated flyback or forward converters via optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Precision reference replacing TL431 in cost-sensitive designs where lower current drive suffices. Use Value: Low 2.0 Ω ZZ minimizes divider current error, improving regulation accuracy compared to looser-tolerance Zeners. | Use Scenario: Providing stable excitation voltage for bridge sensors or analog front-end biasing in test equipment. IC Role / Device Role / Timing Role: Low-drift voltage source for ratiometric measurements requiring <0.5% absolute accuracy. Use Value: Tight ±2% initial tolerance and minimal ΔVZ reduce calibration burden and improve long-term measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same 9.1 V nominal VZ, but ±5% tolerance (B suffix) vs. ±2% (C suffix); identical package and IZM. | Less precise regulation; suitable where cost priority outweighs accuracy requirements. | Select 1N5346B only if ±5% tolerance meets system specification and BOM cost reduction is critical. |
| SMBJ5346B | Surface-mount SMB package (JEDEC DO-214AA); same 9.1 V ±5%, but lower IZM (475 mA) and higher ZZ (2.5 Ω). | Designed for automated SMT assembly; not drop-in compatible due to different footprint and thermal path. | Choose SMBJ5346B only for new SMT designs where board space and assembly method justify trade-offs in regulation precision and power handling. |
Compared with 1N5346B and SMBJ5346B, the 1N5346CE3/TR13 delivers superior voltage accuracy (±2% vs. ±5%), lower dynamic impedance (2.0 Ω vs. 2.5 Ω), and higher surge capability (520 A vs. 475 A), making it optimal for high-reliability reference and protection roles where leaded mounting is acceptable.
Availability
1N5346CE3/TR13 is available at Aetrix Electronics and suitable for power supply voltage reference, overvoltage protection clamp, and DC-DC converter feedback divider applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 1N5346CE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed as a JEDEC-standardized family of 5 W axial Zener diodes to deliver precision voltage regulation with robust surge immunity and extended temperature operation for mission-critical power systems.
FAQ
What is the Zener voltage tolerance of the 1N5346CE3/TR13?
The 1N5346CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its actual regulation voltage falls within 8.918 V to 9.282 V at 25 °C lead temperature and 150 mA test current, as confirmed in Microsemi's official 1N5333B–1N5388B datasheet Rev D.
Does the 1N5346CE3/TR13 require dry packing before soldering?
No, the 1N5346CE3/TR13 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1 classification, meaning it can be stored indefinitely at ambient conditions and subjected to standard reflow profiles (including 260 °C for 10 s) without preconditioning.
What is the maximum continuous Zener current for the 1N5346CE3/TR13?
The maximum continuous Zener current (IZM) for the 1N5346CE3/TR13 is 520 mA at 25 °C lead temperature (TL), assuming proper heat sinking per the 3/8″ lead length condition. At higher temperatures, power must be derated linearly per Figure 1 in the datasheet.
How is polarity marked on the 1N5346CE3/TR13?
The 1N5346CE3/TR13 uses a cathode band to indicate polarity: the banded end is the cathode and must be held positive relative to the unmarked (anode) end during reverse-bias regulation operation. This marking complies with JEDEC DO-204AL standards and is visible on the epoxy body.
Is the 1N5346CE3/TR13 RoHS compliant?
Yes, the 1N5346CE3/TR13 is RoHS compliant, as indicated by the "e3" suffix. Its leads feature annealed matte-tin plating meeting RoHS Directive 2011/65/EU, and the void-free epoxy body satisfies UL94V-0 flammability requirements without halogenated flame retardants.
1N5346CE3/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:
- ±2%
- 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
1N5346CE3/TR13 FAQ
1.How can I place an order for 1N5346CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346CE3/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 1N5346CE3/TR13 reliable?
The price and inventory of 1N5346CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346CE3/TR13 is usually 5 days.
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1N5346CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346CE3/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 1N5346CE3/TR13?
For technical support, including 1N5346CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346CE3/TR13 requirements.
6.How does Aetrix verify that 1N5346CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5346CE3/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 1N5346CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5346CE3/TR13?
All 1N5346CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346CE3/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 1N5346CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5346CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346CE3/TR13 Tags
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