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Microchip Technology 1N5358/TR12
- Part No.:
- 1N5358/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5358/TR12.pdf
- Description:
- DIODE ZENER 22V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,175
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Product details
Overview
1N5358/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 22 V, ±5% tolerance (B suffix), 50 mA test current, 3.5 Ω dynamic impedance at IZT, and maximum surge current of 4.7 A (8.3 ms half-sine). It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5358/TR12 datasheet, 1N5358/TR12 pinout, 1N5358/TR12 application, or 1N5358/TR12 equivalent, key selection criteria include Zener voltage stability under varying load/temperature, thermal resistance (25 °C/W junction-to-lead), low voltage regulation ΔVZ (0.45 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across its cathode–anode terminals when reverse-biased above its breakdown threshold. Its 22 V nominal Zener voltage is specified at 50 mA test current (IZT) with 3.5 Ω dynamic impedance (ZZ), ensuring minimal voltage deviation under load changes.
Thermal design relies on lead-length-dependent junction-to-lead resistance (25 °C/W at 10 mm lead length) and supports up to 5 W steady-state dissipation at TL < 25 °C. Reverse leakage remains ≤0.5 μA at VR = 16.7 V, and forward voltage is ≤1.2 V at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±5% - stable regulation point for 24 V rail clamping and reference generation |
| Test Current (IZT) | 50 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 3.5 Ω - low AC resistance ensures tight voltage regulation under dynamic load shifts |
| Max Surge Current (IZSM) | 4.7 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Power Dissipation | 5.0 W at TL < 25 °C - requires ≥10 mm lead length or heatsinking for full rating |
| Reverse Leakage (IR) | ≤0.5 μA at VR = 16.7 V - negligible standby current in high-impedance bias networks |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable thermal rise with measured lead temperature |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lowest potential; defines return path for Zener current |
| Cathode (banded end) | Regulated voltage node | Provides stable 22 V output when reverse-biased; must be connected to supply rail being regulated |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical specs |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - robust against electrostatic discharge during handling |
| RoHS Compliant (e3) | Lead-free matte-tin plating meets environmental compliance without performance trade-offs |
| High surge withstand | Rated for 4.7 A non-repetitive surge - protects downstream circuitry from line transients |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated DC-DC converters delivering 24 V output. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 22 V setpoint to error amplifier input. Use Value: Maintains ±0.45 V regulation (ΔVZ) across 10–50% of IZM, enabling <1% output voltage drift over load range. |
Use Scenario: Clamping transient spikes on 24 V CAN bus power rail in automotive control modules. IC Role / Device Role / Timing Role: Crowbar element diverting surge energy to ground when rail exceeds 22 V. Use Value: Withstands 4.7 A surge (8.3 ms) without degradation, preserving downstream CAN transceivers. |
| Programmable Logic Controller Input Conditioning | Test Equipment Voltage Reference |
Use Scenario: Providing stable bias for optocoupler input stages in 24 V digital input modules. IC Role / Device Role / Timing Role: Zener-based voltage divider generating fixed 11 V for LED drive current setting. Use Value: Low 3.5 Ω dynamic impedance minimizes current variation across temperature (–65 °C to +150 °C). |
Use Scenario: Serving as primary voltage standard in portable multimeter calibration circuits. IC Role / Device Role / Timing Role: Precision shunt reference with ±5% initial tolerance and <0.45 V regulation delta. Use Value: Enables traceable 22 V reference with <100 ppm/°C tempco contribution via stable thermal resistance path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5358B | Same electrical specs, but in bulk (non-tape-and-reel) packaging; no TR suffix | Not optimized for automated SMT placement; suitable for manual prototyping or low-volume repair | Select 1N5358/TR12 for high-volume production requiring EIA-296 tape-and-reel delivery |
| MMBZ5248B-TP | Surface-mount SOT-23 package; 22 V ±5%, but lower 0.5 W rating and higher 20 Ω ZZ | Limited to low-power signal-level regulation; unsuitable for 5 W dissipation or surge clamping | Choose MMBZ5248B-TP only for space-constrained PCBs where power and surge demands are <100 mW |
Compared with 1N5358B and MMBZ5248B-TP, the 1N5358/TR12 uniquely delivers 5 W axial-leaded regulation with JEDEC-standard thermal resistance and surge capability-making it irreplaceable in industrial power rails requiring both precision and ruggedness.
Availability
1N5358/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and programmable logic controller input conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5358/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 components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of 1N5358/TR12?
The 1N5358/TR12 has a nominal Zener voltage of 22 V with ±5% tolerance, indicated by the "B" suffix per Microsemi's documentation. This means the actual VZ falls between 20.9 V and 23.1 V at 50 mA test current and 25 °C lead temperature. The tolerance is guaranteed across the full operating temperature range (–65 °C to +150 °C), and the device is JEDEC-registered to ensure consistent performance versus other 1N53xxB family members.
Does 1N5358/TR12 require dry packing before PCB assembly?
No, the 1N5358/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry packing or baking prior to reflow soldering. Its void-free thermosetting epoxy body and matte-tin plating eliminate moisture absorption risk, supporting direct use from reel in standard assembly processes without preconditioning.
What is the maximum continuous power dissipation for 1N5358/TR12?
The 1N5358/TR12 is rated for 5.0 W steady-state power dissipation when lead temperature (TL) is maintained below 25 °C, measured at 10 mm (3/8 inch) from the body. Derating is required above that temperature-e.g., at TL = 75 °C, max power drops to 3.75 W. On FR4 PCB with 1 oz copper, its thermal resistance rises to 85 °C/W, limiting usable power to ~1.47 W at 25 °C ambient.
How is polarity marked on the 1N5358/TR12 package?
The 1N5358/TR12 uses a cathode band marking: the banded end is the cathode and must be connected to the more positive potential in the circuit. When operated correctly as a shunt regulator, the cathode supplies the regulated 22 V output while the unbanded (anode) terminal connects to system ground or the return path. Reversing polarity subjects the device to forward conduction and invalidates regulation behavior.
Is 1N5358/TR12 suitable for surge protection in automotive applications?
Yes-the 1N5358/TR12 is rated for 4.7 A non-repetitive surge current (8.3 ms half-sine waveform), making it suitable for clamping load-dump transients on 24 V vehicle subsystems. Its –65 °C to +150 °C operating range, MIL-STD-750 ESD qualification, and robust epoxy encapsulation meet key automotive environmental requirements, though system-level validation per ISO 7637-2 remains necessary.
1N5358/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:
- ±20%
- 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
1N5358/TR12 FAQ
1.How can I place an order for 1N5358/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5358/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 1N5358/TR12 reliable?
The price and inventory of 1N5358/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5358/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5358/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5358/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5358/TR12?
1N5358/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5358/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 1N5358/TR12?
For technical support, including 1N5358/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5358/TR12 requirements.
6.How does Aetrix verify that 1N5358/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5358/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 1N5358/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5358/TR12?
All 1N5358/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5358/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 1N5358/TR12 part is unused and in its original packaging.
Return procedure for 1N5358/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5358/TR12 Tags
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