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Microchip Technology 1N5358A/TR12
- Part No.:
- 1N5358A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5358A/TR12.pdf
- Description:
- DIODE ZENER 22V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,230
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Product details
Overview
1N5358A/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 22 V, ±10% tolerance (A suffix), 50 mA test current (IZT), 3.5 Ω dynamic impedance (ZZ), and maximum surge current of 4.7 A. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5358A/TR12 datasheet, 1N5358A/TR12 pinout, 1N5358A/TR12 application, or 1N5358A/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), steady-state power rating (5 W at TL < 25 °C), reverse leakage current (≤0.5 μA at 15.8 V), and RoHS-compliant plating options.
Technical Context
This Zener diode functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current (10–50 mA) and temperature ranges. Its low dynamic impedance (3.5 Ω) ensures minimal voltage variation under load changes, and its 25 °C/W thermal resistance enables reliable operation with standard lead-length heat sinking.
The device uses a void-free thermosetting epoxy case (UL94V-0), tin-lead or RoHS-compliant matte-tin plating, and cathode polarity marked by a band. It meets MIL-STD-750 Method 1020 for ESD insensitivity and supports tape-and-reel packaging (TR12 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±10% - defines nominal regulation point; high-end tolerance = 24.2 V for IZM calculation |
| Test Current (IZT) | 50 mA - operating point where VZ and ZZ are specified; sets baseline bias for stable regulation |
| Dynamic Impedance (ZZ) | 3.5 Ω - low AC resistance ensures <0.18 V ΔVZ across 10–50% of IZM (4.7 A) |
| Max Surge Current (IZSM) | 4.7 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - allows 5 W dissipation with ≤25 °C rise above lead temperature at 3/8″ length |
| Reverse Leakage (IR) | ≤0.5 μA @ 15.8 V - ensures minimal quiescent current in standby regulation circuits |
| Operating Temp Range | –65 °C to +150 °C - suitable for automotive under-hood and industrial control environments |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-201AD), void-free UL94V-0 epoxy body, cathode indicated by color band. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse bias applied between cathode and anode to enable regulation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to higher-potential node; maintains stable 22 V relative to anode when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and electrical test conditions across 1N53xx series |
| Moisture sensitivity Level 1 | No dry pack required before PCB assembly - reduces handling cost and process complexity |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manual assembly or rework |
| RoHS-compliant option (e3 suffix) | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating - no lead or hazardous substances |
| Tape-and-reel packaging (TR suffix) | Enables automated pick-and-place assembly; TR12 denotes 12 mm tape width per EIA-296 standard |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference |
|---|---|
Use Scenario: Stabilizing 24 V rail in programmable logic controller (PLC) I/O modules under varying load and temperature. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 22 V bias for op-amp comparators and ADC references. Use Value: Maintains ≤0.45 V regulation error (ΔVZ) across –40 °C to +85 °C and 5–50 mA load current, ensuring consistent analog measurement accuracy. | Use Scenario: Providing stable reference voltage for microcontroller reset circuitry in engine control units exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Zener clamp protecting reset IC input against battery transients up to 40 V. Use Value: Withstands 4.7 A surge (8.3 ms) without degradation and operates reliably from –40 °C to +125 °C ambient. |
| Telecom Line Card Protection | Medical Instrument Calibration |
Use Scenario: Overvoltage clamping on 48 V DC distribution lines in telecom central office equipment. IC Role / Device Role / Timing Role: Shunt protector diverting lightning-induced surges away from sensitive line interface ICs. Use Value: Low 3.5 Ω dynamic impedance limits clamping voltage overshoot to <24.2 V during fast transients, preserving downstream IC integrity. | Use Scenario: Generating traceable 22 V reference for calibration of portable patient monitor analog front-ends. IC Role / Device Role / Timing Role: Precision voltage source for DAC offset trimming and sensor excitation circuits. Use Value: ±10% tolerance and <0.5 μA leakage at 15.8 V ensure low drift and minimal loading error in high-impedance calibration paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5358B/TR12 | ±5% tolerance (vs. ±10% for 1N5358A/TR12); identical VZ nominal, IZT, ZZ, and package | Higher precision required in feedback loops where tighter voltage stability is critical | Select 1N5358B/TR12 when regulation accuracy better than ±10% is needed without changing layout or thermal design |
| MMBZ5248BS-7-F | Surface-mount SOD-123 package; 22 V ±5%; 200 mW power rating (vs. 5 W); 30 Ω ZZ | Low-power, space-constrained designs where board area is prioritized over surge robustness | Choose MMBZ5248BS-7-F only for signal-level referencing; not suitable for power regulation or surge clamping roles of 1N5358A/TR12 |
Compared with 1N5358B/TR12 and MMBZ5248BS-7-F, the 1N5358A/TR12 offers the highest surge current capability (4.7 A) and power handling (5 W) in axial-leaded form, making it uniquely suited for industrial and automotive power rail stabilization where reliability under stress is non-negotiable.
Availability
1N5358A/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU reference, and telecom line card protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5358A/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed for rugged, high-power voltage regulation in harsh-environment systems where thermal stability, surge immunity, and long-term parametric consistency are essential.
FAQ
What is the Zener voltage tolerance of the 1N5358A/TR12?
The 1N5358A/TR12 has a Zener voltage tolerance of ±10%, as indicated by the "A" suffix per Microsemi's documentation. This means its measured VZ at 50 mA test current falls between 19.8 V and 24.2 V at 25 °C. The tolerance directly affects regulation accuracy in feedback networks and must be accounted for in worst-case circuit analysis.
Does the 1N5358A/TR12 require dry packing before PCB assembly?
No, the 1N5358A/TR12 has moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it does not require dry packing or baking prior to reflow soldering. Its void-free epoxy encapsulation prevents moisture ingress, simplifying manufacturing logistics and reducing assembly risk.
What is the maximum steady-state power dissipation for the 1N5358A/TR12 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz Cu, 4 mm² copper pads, 1 mm track width, 25 mm length), the 1N5358A/TR12 has a steady-state power rating of 1.47 W at 25 °C ambient. This derated value reflects its 85 °C/W junction-to-ambient thermal resistance and must be used for thermal design validation.
Can the 1N5358A/TR12 be used as a direct replacement for the 1N5358B/TR12?
The 1N5358A/TR12 is not a direct replacement for the 1N5358B/TR12 due to its wider ±10% voltage tolerance versus the B version's ±5%. While mechanically and electrically pin-compatible, substituting them may cause regulation errors exceeding system specifications in precision applications-always verify loop stability and worst-case voltage margins.
What does the "TR12" suffix indicate in the 1N5358A/TR12 part number?
The "TR12" suffix in 1N5358A/TR12 indicates tape-and-reel packaging per EIA-296 standard, with 12 mm carrier tape width. This format supports automated surface-mount assembly equipment and is distinct from bulk or ammo-pack options-critical for high-volume production planning.
1N5358A/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:
- ±10%
- 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
1N5358A/TR12 FAQ
1.How can I place an order for 1N5358A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5358A/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 1N5358A/TR12 reliable?
The price and inventory of 1N5358A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5358A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5358A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5358A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5358A/TR12?
1N5358A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5358A/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 1N5358A/TR12?
For technical support, including 1N5358A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5358A/TR12 requirements.
6.How does Aetrix verify that 1N5358A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5358A/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 1N5358A/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5358A/TR12?
All 1N5358A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5358A/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 1N5358A/TR12 part is unused and in its original packaging.
Return procedure for 1N5358A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5358A/TR12 Tags
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MMSZ5231B-7-F
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MMSZ4682T1G
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MM5Z5V1ST1G
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