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Microchip Technology 1N5346CE3/TR12
- Part No.:
- 1N5346CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5346CE3/TR12.pdf
- Description:
- DIODE ZENER 9.1V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,531
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Product details
Overview
1N5346CE3/TR12 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 provides stable voltage reference in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.
For engineers reviewing the 1N5346CE3/TR12 datasheet, 1N5346CE3/TR12 pinout, 1N5346CE3/TR12 application, or 1N5346CE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (520 A), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its Zener voltage is specified at 9.1 V ±2% under 150 mA DC test current (IZT), with low dynamic impedance (2.0 Ω) ensuring minimal voltage variation across load current changes. Voltage regulation (ΔVZ) is 0.22 V between 10% and 50% of IZM.
Thermal design relies on lead-temperature derating: full 5 W dissipation is rated at TL = 25°C (3/8″ from body); junction-to-lead thermal resistance is 25 °C/W. The cathode is marked by a band, and polarity must be observed-cathode positive relative to anode for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±2% - precise reference for feedback and clamping at nominal 150 mA operating point |
| Power Dissipation | 5.0 W at TL = 25°C - requires adequate heatsinking beyond 25°C lead temperature |
| Max Zener Current (IZM) | 520 mA - maximum steady-state reverse current before thermal runaway under proper mounting |
| Dynamic Impedance (ZZ) | 2.0 Ω at IZT = 150 mA - ensures <22 mV output shift per 10 mA load change near regulation point |
| Surge Current (IZSM) | 520 A peak (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Operating Temperature | –65°C to +150°C - suitable for industrial, automotive under-hood, and aerospace environments |
| Forward Voltage | 1.2 V max @ 1.0 A - defines forward conduction loss during fault or bidirectional clamp configurations |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), 0.7 g weight, moisture sensitivity Level 1 (no dry pack required). Cathode indicated by color band; leads are annealed matte-tin plated per MIL-STD-750, solderable at 260°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in shunt regulator configuration | Connected to system ground or lower-potential rail; carries full load current when regulating |
| Cathode | Regulated output node | Banded end; held at stable 9.1 V above anode; supplies reference or clamps excess voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in feedback networks |
| RoHS-compliant e3 suffix | Meets global environmental compliance requirements with matte-tin plating and lead-free assembly compatibility |
| JEDEC-registered 1N53xxB series | Guarantees standardized mechanical dimensions, marking, and electrical behavior across qualified suppliers |
| Low 25 °C/W junction-to-lead thermal resistance | Supports high-power operation with simple lead-based heatsinking-no PCB copper pour required for 5 W at TL ≤ 25°C |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions or on-board ESD protection in assembly and field use |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for 12 V Rail |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt reference providing precise 9.1 V threshold to error amplifier input. Use Value: ±2% tolerance ensures output regulation within ±1% over line/load/temperature, reducing need for post-production calibration. | Use Scenario: Placed across 12 V automotive or industrial supply rail to limit transients above 9.1 V. IC Role / Device Role / Timing Role: Passive crowbar element conducting only during overvoltage events >9.1 V. Use Value: 520 A surge rating absorbs ISO 7637-2 pulse 5a without degradation, protecting downstream 12 V logic. |
| Programmable Voltage Reference | Temperature-Stable Bias Generator |
Use Scenario: Paired with resistor divider to generate adjustable reference for ADC or DAC circuits. IC Role / Device Role / Timing Role: Primary Zener element establishing base reference potential. Use Value: Low 2.0 Ω dynamic impedance minimizes reference drift under varying divider current, improving measurement repeatability. | Use Scenario: Supplies bias current to transistor amplifiers requiring stable quiescent point across –40°C to +125°C. IC Role / Device Role / Timing Role: Voltage-setting element defining emitter/base bias voltage. Use Value: Specified operation to +150°C enables reliable biasing in high-ambient environments like motor control enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same 9.1 V nominal, but ±5% tolerance (B suffix) vs. ±2% (C suffix) | Lower accuracy acceptable in non-critical clamping or coarse reference roles | Select 1N5346B where cost sensitivity outweighs tight regulation needs |
| MMSZ5240ET1G | Surface-mount SOD-123 package, 500 mW rating, ±5% tolerance, 9.1 V nominal | Not suitable for 5 W continuous dissipation; limited to low-power signal-level referencing | Choose MMSZ5240ET1G only for space-constrained PCBs where power <0.5 W |
Compared with 1N5346B and MMSZ5240ET1G, the 1N5346CE3/TR12 delivers superior thermal performance (5 W vs. 0.5 W), tighter voltage accuracy (±2% vs. ±5%), and axial-leaded robustness for high-surge industrial use-making it the sole option for high-power, high-reliability shunt regulation.
Availability
1N5346CE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5346CE3/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) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems-emphasizing thermal robustness, surge immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5346CE3/TR12?
The 1N5346CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage falls within 8.92 V to 9.28 V at 150 mA test current and 25°C lead temperature. This tighter tolerance supports precision applications such as feedback references in regulated power supplies where output accuracy is critical.
Does the 1N5346CE3/TR12 require dry-pack packaging due to moisture sensitivity?
No, the 1N5346CE3/TR12 does not require dry-pack packaging. It carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 classification, meaning it can be stored indefinitely at ambient conditions without baking or humidity-controlled packaging prior to soldering.
What is the maximum surge current rating for the 1N5346CE3/TR12?
The 1N5346CE3/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 520 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient overvoltage events-such as load dump or ESD-induced spikes-without parametric shift or catastrophic failure.
How is thermal management handled for the 1N5346CE3/TR12 in high-power operation?
Thermal management for the 1N5346CE3/TR12 relies on junction-to-lead conduction: its thermal resistance is 25 °C/W when measured at 3/8″ (10 mm) from the body. Full 5 W dissipation is permitted only if lead temperature (TL) remains at or below 25°C; derating is required above that point per Figure 1 in the datasheet. No PCB copper area is mandatory for basic operation.
Is the 1N5346CE3/TR12 compatible with lead-free reflow processes?
Yes, the 1N5346CE3/TR12 is RoHS-compliant (e3 suffix) and features annealed matte-tin plating qualified per MIL-STD-750 Method 2026. It supports soldering at 260°C for up to 10 seconds, making it compatible with standard lead-free reflow profiles used in modern electronics assembly.
1N5346CE3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N5346CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5346CE3/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 1N5346CE3/TR12 reliable?
The price and inventory of 1N5346CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5346CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5346CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5346CE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5346CE3/TR12?
1N5346CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5346CE3/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 1N5346CE3/TR12?
For technical support, including 1N5346CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5346CE3/TR12 requirements.
6.How does Aetrix verify that 1N5346CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5346CE3/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 1N5346CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5346CE3/TR12?
All 1N5346CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5346CE3/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 1N5346CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5346CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5346CE3/TR12 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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