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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology 1N5358C/TR8

Name: 1N5358C/TR8
Brand: Microchip Technology
SKU: 1N5358C/TR8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5358C/TR8

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5358C/TR8.pdf

Description:: DIODE ZENER 22V 5W T18

Quantity:: RFQ Add To RFQ list

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Inventory:8,353

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Product details

Overview

1N5358C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 22 V, ±2% tolerance (C suffix), 50 mA test current, 3.5 Ω maximum dynamic impedance at I_ZT, and 75 mA maximum Zener current (I_ZM) when adequately heat-sunk. It regulates voltage across industrial power supplies and voltage reference circuits operating from −65 °C to +150 °C.

For engineers reviewing the 1N5358C/TR8 datasheet, 1N5358C/TR8 pinout, 1N5358C/TR8 application, or 1N5358C/TR8 equivalent, key selection criteria include its tight ±2% V_Z tolerance, low 3.5 Ω Zener impedance at 50 mA, 75 mA I_ZM, 25 °C/W junction-to-lead thermal resistance, and RoHS-compliant e3 marking with TR8 tape-and-reel packaging.

Technical Context

This device operates as a two-terminal voltage reference in reverse-bias mode, where the banded (cathode) end is held positive relative to the anode. Its regulation performance is specified at 25 °C lead temperature with 40 ms DC current application, and voltage regulation (ΔV_Z) is defined as the difference between measurements at 10% and 50% of I_ZM.

The 1N5358C/TR8 exhibits 0.45 V maximum voltage regulation (ΔV_Z) and 216 Ω maximum dynamic knee impedance (Z_ZK) at 1.0 mA, supporting stable reference generation under light-load conditions. Its surge current rating is 4.7 A for a non-recurrent 8.3 ms half-sine wave.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	22 V ±2% - precise regulation point for mid-range voltage references
Test Current (I_ZT)	50 mA - standardized bias point for V_Z measurement and impedance characterization
Dynamic Impedance (Z_Z)	3.5 Ω max at I_ZT - low AC resistance ensures minimal output voltage variation with load current changes
Max Zener Current (I_ZM)	75 mA - maximum continuous DC current at TL = 25 °C with 3/8″ lead length heat sinking
Power Dissipation	5.0 W at TL < 25 °C - requires thermal management beyond ambient mounting on FR4
Voltage Regulation (ΔV_Z)	0.45 V max - difference between V_Z measured at 10% and 50% of I_ZM, indicating regulation linearity
Thermal Resistance	25 °C/W junction-to-lead - enables predictable junction temperature rise with known lead temperature

Pinout & Package

Package: Axial-leaded T-18 plastic case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, cathode indicated by band. Weight: 0.7 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Reference ground node	Connected to circuit common; reverse-biased operation requires this terminal to be at lower potential than cathode
Cathode (banded end)	Regulated output node	Provides stable 22 V reference when reverse-biased; must be held positive relative to anode

Key Features

Feature	Design Value
±2% Zener voltage tolerance (C suffix)	Enables high-accuracy voltage references without post-calibration in precision power supplies
JEDEC-registered 1N53xxB series	Guarantees mechanical and electrical interchangeability across qualified suppliers and screening levels
Moisture sensitivity Level 1	Eliminates dry-pack requirement and floor-life constraints for SMT-compatible handling (TR8 tape)
25 °C/W junction-to-lead thermal resistance	Supports reliable 5 W operation with simple lead-length heat sinking-no PCB copper pour needed
RoHS-compliant e3 marking	Confirms lead-free plating and halogen-free epoxy per EU Directive 2011/65/EU

Applications

Industrial Power Supply Reference	Overvoltage Protection Clamp
Use Scenario: Stabilizing feedback node in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Voltage reference element providing fixed 22 V setpoint for optocoupler-driven regulation loop. Use Value: ±2% V_Z tolerance and 3.5 Ω Z_Z ensure <±0.5% output voltage drift over line/load/temperature in 24 V output designs.	Use Scenario: Clamping transient surges on 24 V industrial control bus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground during >28 V transients. Use Value: 4.7 A surge current rating and 0.45 V ΔV_Z maintain clamping accuracy during repetitive 8.3 ms surges per IEC 61000-4-5.
Programmable Logic Controller Input Conditioning	Test Equipment Calibration Reference
Use Scenario: Providing stable 22 V reference for analog input scaling and ADC biasing in modular PLC I/O modules. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known voltage rail for signal conditioning op-amps. Use Value: 216 Ω Z_ZK at 1 mA supports accurate low-current biasing without loading error in high-impedance sensor interfaces.	Use Scenario: Serving as traceable voltage standard in handheld multimeter calibration fixtures and benchtop reference sources. IC Role / Device Role / Timing Role: Primary Zener reference element in temperature-compensated divider networks. Use Value: Tight ±2% tolerance and −65 °C to +150 °C operating range enable calibration stability across environmental test chambers.

Industrial Power Supply Reference

Overvoltage Protection Clamp

Use Scenario: Stabilizing feedback node in isolated DC-DC converter secondary-side error amplifiers.

IC Role / Device Role / Timing Role: Voltage reference element providing fixed 22 V setpoint for optocoupler-driven regulation loop.

Use Value: ±2% V_Z tolerance and 3.5 Ω Z_Z ensure <±0.5% output voltage drift over line/load/temperature in 24 V output designs.

Use Scenario: Clamping transient surges on 24 V industrial control bus lines exposed to inductive switching noise.

IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground during >28 V transients.

Use Value: 4.7 A surge current rating and 0.45 V ΔV_Z maintain clamping accuracy during repetitive 8.3 ms surges per IEC 61000-4-5.

Programmable Logic Controller Input Conditioning

Test Equipment Calibration Reference

Use Scenario: Providing stable 22 V reference for analog input scaling and ADC biasing in modular PLC I/O modules.

IC Role / Device Role / Timing Role: Precision shunt regulator establishing known voltage rail for signal conditioning op-amps.

Use Value: 216 Ω Z_ZK at 1 mA supports accurate low-current biasing without loading error in high-impedance sensor interfaces.

Use Scenario: Serving as traceable voltage standard in handheld multimeter calibration fixtures and benchtop reference sources.

IC Role / Device Role / Timing Role: Primary Zener reference element in temperature-compensated divider networks.

Use Value: Tight ±2% tolerance and −65 °C to +150 °C operating range enable calibration stability across environmental test chambers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5358B/TR8	±5% V_Z tolerance (B suffix) vs. ±2% (C suffix); otherwise identical electrical and mechanical specs	Acceptable where tighter regulation not required; lower cost for non-critical references	Select 1N5358B/TR8 only if system-level testing confirms ±5% V_Z meets total error budget
MMSZ5247ET1G	Surface-mount SOD-123 package; 20 V nominal V_Z; 500 mW power rating; ±5% tolerance	Not drop-in replaceable-requires PCB redesign; suitable only for low-power, space-constrained designs	Choose MMSZ5247ET1G only when board area is constrained and 20 V/500 mW suffices

Compared with 1N5358B/TR8, the 1N5358C/TR8 delivers higher initial accuracy critical for closed-loop regulation, while MMSZ5247ET1G offers footprint reduction at the expense of power handling and voltage match-neither is pin-compatible due to axial vs. SMD form factor and differing V_Z.

Availability

1N5358C/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable logic controller input conditioning requiring stable component supply and long-term obsolescence management.

Supply support for 1N5358C/TR8 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 1N53xx series was designed specifically for robust, high-power voltage regulation in harsh-environment power systems where thermal stability, surge resilience, and long-term parametric consistency are mandatory.

FAQ

What is the Zener voltage tolerance of the 1N5358C/TR8?

The 1N5358C/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in its part number. This means its actual regulation voltage falls within 21.56 V to 22.44 V at 25 °C lead temperature and 50 mA test current. This tighter tolerance supports precision reference applications where ±5% devices like the 1N5358B/TR8 would introduce unacceptable error.

Can the 1N5358C/TR8 be used without a heatsink?

The 1N5358C/TR8 can dissipate up to 5.0 W only when the lead temperature (TL) is maintained below 25 °C-typically achieved using ≥3/8″ (10 mm) lead length as a thermal path. On a standard FR4 PCB with 1 oz copper, its steady-state power drops to 1.47 W. For full 5 W operation, external heatsinking or forced-air cooling is required; derating curves in the datasheet must be followed.

What does the "TR8" suffix mean in 1N5358C/TR8?

The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, with 8 mm tape width and component orientation optimized for automated pick-and-place assembly. This format ensures consistent feeding, static-safe handling, and RoHS compliance (e3 marking). The TR8 variant is functionally identical to bulk or ammo-pack versions of 1N5358C.

Is the 1N5358C/TR8 suitable for surge protection applications?

Yes-the 1N5358C/TR8 is rated for 4.7 A peak surge current (I_ZSM) under an 8.3 ms non-recurrent half-sine waveform, making it suitable for clamping transient overvoltages in 24 V industrial buses. Its 0.45 V voltage regulation (ΔV_Z) ensures clamping voltage remains tightly bounded during surge events, provided adequate PCB layout minimizes parasitic inductance.

How does the 1N5358C/TR8 compare to the 1N4742A?

The 1N5358C/TR8 (22 V, 5 W, ±2%) differs from the 1N4742A (12 V, 1 W, ±5%) in voltage rating, power handling, tolerance, and package. The 1N5358C/TR8 offers more than four times the power dissipation and tighter tolerance but requires axial-leaded mounting. They are not interchangeable-selection depends strictly on required V_Z, power, and accuracy.

1N5358C/TR8 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/TR8 FAQ

1.How can I place an order for 1N5358C/TR8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5358C/TR8 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/TR8 reliable?

The price and inventory of 1N5358C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5358C/TR8 is usually 5 days.

3.What payment methods are accepted for 1N5358C/TR8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5358C/TR8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5358C/TR8?

1N5358C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5358C/TR8 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/TR8?

For technical support, including 1N5358C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5358C/TR8 requirements.

6.How does Aetrix verify that 1N5358C/TR8 is sourced from the original manufacturer or authorized distributors?

All 1N5358C/TR8 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/TR8 meets industry standards.

7.What is the process for return or replacement of 1N5358C/TR8?

All 1N5358C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5358C/TR8, 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/TR8 part is unused and in its original packaging.

Return procedure for 1N5358C/TR8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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