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Microchip Technology 1N5358C/TR12
- Part No.:
- 1N5358C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5358C/TR12.pdf
- Description:
- DIODE ZENER 22V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,713
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Product details
Overview
1N5358C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 22 V, ±2% tolerance (C suffix), 50 mA test current (IZT), 3.5 Ω dynamic impedance (ZZ), and 75 mA maximum regulator current (IZM). 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 1N5358C/TR12 datasheet, 1N5358C/TR12 pinout, 1N5358C/TR12 application, or 1N5358C/TR12 equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC T-18 package details, and validated alternatives for industrial power regulation design.
Technical Context
This device functions as a two-terminal voltage reference, maintaining stable reverse-biased conduction above its 22 V Zener breakdown threshold. Its low 3.5 Ω dynamic impedance ensures minimal voltage variation across 10–50% of IZM (7.5–37.5 mA), and its 25 °C/W junction-to-lead thermal resistance supports reliable 5 W operation with 3/8″ lead length heat sinking.
The 1N5358C/TR12 exhibits 0.45 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, and withstands 4.7 A non-repetitive surge current (8.3 ms half-sine). Its cathode band marking and RoHS-compliant matte-tin plating comply with MIL-STD-750 Method 2026 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±2% - precise regulation point for feedback sensing at 50 mA test current |
| Power Dissipation | 5.0 W at TL = 25°C (3/8″ lead length) - defines maximum continuous DC power under specified thermal mounting |
| Dynamic Impedance (ZZ) | 3.5 Ω - low AC impedance ensures <0.5 V output shift across 30 mA operating current range |
| Max Regulator Current (IZM) | 75 mA - maximum DC current before exceeding 5 W at upper-tolerance VZ (22.44 V) |
| Voltage Regulation (ΔVZ) | 0.45 V - difference between VZ measured at 7.5 mA and 37.5 mA, indicating tight regulation linearity |
| Surge Current (IZSM) | 4.7 A (8.3 ms half-sine) - peak transient capability for short-duration overvoltage events |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design with simple lead-length heat sinking, not PCB copper area dependent |
Pinout & Package
JEDEC T-18 axial-leaded plastic package (void-free UL94V-0 epoxy body); cathode identified by colored band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common or ground; reverse bias applied to cathode for regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; maintains 22 V relative to anode when reverse biased ≥22 V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy feedback without external trimming in 22 V reference designs |
| 25 °C/W junction-to-lead thermal resistance | Allows full 5 W operation with only 3/8″ lead length heat sinking-no PCB copper pour required |
| 0.45 V voltage regulation (ΔVZ) | Ensures ≤2.05% output variation across 10–50% of rated current, critical for stable LDO or SMPS references |
| RoHS-compliant e3 marking & matte-tin plating | Guarantees lead-free assembly compatibility and MIL-STD-750 solderability without flux residue concerns |
| Moisture sensitivity Level 1 (J-STD-020B) | Eliminates dry-pack requirement and floor-life restrictions-ready for immediate reflow or hand-soldering |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Provides stable 22 V reference for optocoupler-based feedback in isolated 48 V DC-DC converters. IC Role / Device Role / Timing Role: Zener reference element in secondary-side error amplifier loop. Use Value: Maintains ±0.44 V regulation window (0.45 V ΔVZ) across load transients, ensuring <±1% output voltage stability. |
Use Scenario: Supplies excitation voltage to 4–20 mA current-loop pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt reference for analog front-end biasing. Use Value: Delivers 22 V ±0.44 V over –40°C to +85°C ambient, meeting IEC 61000-4-5 surge immunity requirements. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Clamps 24 V rail surges in PLC I/O modules during inductive load switching. IC Role / Device Role / Timing Role: Transient voltage suppression element across supply rails. Use Value: Absorbs 4.7 A surge (8.3 ms) without degradation, protecting downstream 24 V logic ICs. |
Use Scenario: Sets trip point for comparator-based brown-out detection in battery-powered telemetry units. IC Role / Device Role / Timing Role: Stable 22 V threshold reference for LM393 comparator input. Use Value: Enables 22.0 V ±0.44 V trigger accuracy across temperature, reducing false alarms by >95% vs. resistor-divider references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5358B/TR12 | ±5% tolerance (B suffix) vs. ±2% (C suffix); identical VZ nominal, IZT, ZZ, IZM, and package | Acceptable where 22 V ±1.1 V (vs. ±0.44 V) regulation accuracy suffices | Select 1N5358B/TR12 for cost-sensitive industrial controls where tighter tolerance is unnecessary |
| MMSZ5247ET1G | Surface-mount SOD-123 package; 20 V nominal, ±5%; 500 mW rating; 22 Ω ZZ; 20 mA IZM | Not suitable for 5 W dissipation; limited to low-power bias/reference roles | Choose MMSZ5247ET1G only for space-constrained PCBs with <100 mW Zener loading and 20 V requirement |
Compared with 1N5358C/TR12, the 1N5358B/TR12 trades ±2% accuracy for lower unit cost while retaining identical thermal and surge performance; MMSZ5247ET1G offers footprint reduction but sacrifices 90% power handling and voltage precision-neither is pin-compatible or drop-in.
Availability
1N5358C/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, overvoltage protection circuits, and programmable threshold detection requiring stable component supply and long-term obsolescence management.
Supply support for 1N5358C/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 power management components for aerospace, defense, and industrial markets.
The 1N53xx series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and JEDEC-standardized axial-leaded reliability.
FAQ
What is the Zener voltage tolerance of the 1N5358C/TR12?
The 1N5358C/TR12 has a ±2% Zener voltage tolerance, confirmed by the "C" suffix per Microsemi's datasheet revision D. This means its actual breakdown voltage falls between 21.56 V and 22.44 V at 50 mA test current and 25°C lead temperature. The 1N5358C/TR12 achieves this tighter tolerance via post-package sorting and screening, distinguishing it from the ±5% 1N5358B/TR12 variant.
Can the 1N5358C/TR12 be used without a heatsink?
Yes-the 1N5358C/TR12 can dissipate its full 5 W rating without an external heatsink when mounted with 3/8″ (10 mm) lead length from the epoxy body, leveraging its 25 °C/W junction-to-lead thermal resistance. However, at ambient temperatures above 25°C or with shorter leads, derating per Figure 1 is required. The 1N5358C/TR12 is not rated for 5 W on standard FR4 PCBs without additional copper area.
What does the "TR12" suffix indicate for the 1N5358C/TR12?
The "TR12" suffix on the 1N5358C/TR12 denotes tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format supports automated SMT placement despite the axial-leaded T-18 package, enabling high-volume manufacturing. The 1N5358C/TR12 retains all electrical and thermal specifications of the bulk version, with no performance impact from the packaging method.
How does the 1N5358C/TR12 handle surge conditions?
The 1N5358C/TR12 is rated for 4.7 A peak non-repetitive surge current (IZSM) in an 8.3 ms half-sine waveform, per JEDEC test method. This capability allows it to clamp transient overvoltages-such as those from inductive kickback or ESD-without parametric shift or failure. The 1N5358C/TR12's robust construction and low thermal mass enable rapid energy absorption, making it suitable for industrial I/O protection.
Is the 1N5358C/TR12 RoHS compliant?
Yes-the 1N5358C/TR12 carries the "e3" designation per Microsemi documentation, confirming RoHS compliance with lead-free matte-tin plating and UL94V-0 epoxy encapsulation. It meets J-STD-020B moisture sensitivity Level 1, eliminating dry-pack requirements. The 1N5358C/TR12 is qualified for Pb-free reflow processes up to 260°C for 10 seconds, per MIL-STD-750 Method 2026.
1N5358C/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):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 15.8 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
1N5358C/TR12 FAQ
1.How can I place an order for 1N5358C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5358C/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 1N5358C/TR12 reliable?
The price and inventory of 1N5358C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5358C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5358C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5358C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5358C/TR12?
1N5358C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5358C/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 1N5358C/TR12?
For technical support, including 1N5358C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5358C/TR12 requirements.
6.How does Aetrix verify that 1N5358C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5358C/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 1N5358C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5358C/TR12?
All 1N5358C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5358C/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 1N5358C/TR12 part is unused and in its original packaging.
Return procedure for 1N5358C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5358C/TR12 Tags
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