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Microchip Technology 1N5358A/TR8
- Part No.:
- 1N5358A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5358A/TR8.pdf
- Description:
- DIODE ZENER 22V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,644
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Product details
Overview
1N5358A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 22 V, ±10% tolerance (A suffix), 50 mA test current (IZT), 3.5 Ω maximum dynamic impedance (ZZ), and 0.5 μA maximum reverse leakage at 17.6 V (VR). It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies and industrial control circuits.
For engineers reviewing the 1N5358A/TR8 datasheet, 1N5358A/TR8 pinout, 1N5358A/TR8 application, or 1N5358A/TR8 equivalent, key selection factors include its 22 V Zener voltage, ±10% tolerance, 5 W steady-state power rating at TL < 25 °C, low thermal resistance (25 °C/W junction-to-lead), 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, maintaining stable output voltage across wide current (10–50 mA) and temperature (–65 °C to +150 °C) ranges. Its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with minimal lead-length heat sinking.
The 1N5358A/TR8 exhibits 0.45 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, and 216 Ω maximum dynamic knee impedance (ZZK) at 1.0 mA - confirming sharp knee characteristics suitable for low-current reference applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, ±10% tolerance - defines regulated output level under specified test conditions |
| Test Current (IZT) | 50 mA - current at which VZ is measured; establishes baseline operating point |
| Dynamic Impedance (ZZ) | 3.5 Ω max - low AC resistance ensures minimal voltage shift with load current changes |
| Max Reverse Leakage (IR) | 0.5 μA at 17.6 V - confirms tight regulation threshold and low standby power loss |
| Power Dissipation (Pd) | 5.0 W at TL < 25 °C (3/8″ lead length) - sets absolute thermal limit with simple heatsinking |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables predictable temperature rise with known lead-mounting geometry |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; current flows into cathode during regulation |
| Cathode | Regulated output terminal | Banded end; held at stable 22 V relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xx mechanical and electrical definitions |
| 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 - safe for standard handling without special precautions |
| High surge current capability | 75 A peak (8.3 ms) - provides robust transient suppression in unregulated supply rails |
| Stable voltage vs. temperature | Operates continuously from –65 °C to +150 °C - suitable for automotive under-hood and industrial environments |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in 24 V DC-DC converter secondary side. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing fixed 22 V bias to error amplifier input. Use Value: Maintains ±10% output accuracy across –40 °C to +85 °C ambient with ≤0.45 V regulation drift over 10–50 mA load range. |
Use Scenario: Clamping transient spikes on 24 V CAN bus power rail. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 22 V to ground. Use Value: Withstands 75 A 8.3 ms surges without degradation, limiting rail voltage to ≤22.5 V during transients. |
| Programmable Logic Controller Input Conditioning | Test Equipment Reference Source |
Use Scenario: Providing stable 22 V reference for analog input scaling circuitry. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known voltage for ADC reference divider. Use Value: Delivers 22 V ±10% with 3.5 Ω dynamic impedance, minimizing gain error from source impedance mismatch. |
Use Scenario: Generating calibrated 22 V reference in portable multimeter calibration mode. IC Role / Device Role / Timing Role: Low-drift Zener reference operating at 50 mA for high-stability output. Use Value: Achieves 0.45 V ΔVZ over 10–50 mA range, enabling <0.5% full-scale reference uncertainty in handheld instruments. |
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% tolerance (vs. ±10%); same VZ, IZT, ZZ, and package | Higher precision required where tighter regulation stability is critical | Select when reference accuracy > ±5% is mandatory and cost premium is acceptable |
| MMBZ5248BS-7-F | Surface-mount SOD-123 package; 22 V, ±5%; 200 mW rating | Not suitable for 5 W power dissipation; limited to low-power signal-level regulation | Choose only for space-constrained PCBs where thermal load < 0.2 W and no axial mounting is allowed |
Compared with 1N5358A/TR8, the 1N5358B/TR8 offers tighter voltage tolerance but identical thermal and surge performance, while MMBZ5248BS-7-F trades 25× lower power rating and SMT compatibility for reduced board area - neither is pin-compatible due to axial vs. SMT packaging.
Availability
1N5358A/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 1N5358A/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zeners to deliver rugged, moisture-insensitive voltage regulation for harsh-environment power systems and legacy industrial equipment.
FAQ
What is the Zener voltage tolerance for 1N5358A/TR8?
The "A" suffix in 1N5358A/TR8 specifies a ±10% Zener voltage tolerance, meaning the actual regulation voltage falls between 19.8 V and 24.2 V at 50 mA test current and 25 °C. This is confirmed in the manufacturer's datasheet Note 1 and Electrical Characteristics table, where 1N5358A is explicitly listed with ±10% tolerance - distinct from the ±5% "B" variant.
Can 1N5358A/TR8 be used in surface-mount designs?
No, 1N5358A/TR8 is an axial-leaded T-18 package device and cannot be directly mounted on SMT pads. For surface-mount equivalents, Microsemi offers the SMBJ5358B series in DO-214AA (SMB) package - but note that 1N5358A/TR8 itself requires through-hole or axial mounting with ≥10 mm lead length for rated 5 W dissipation.
What is the maximum surge current rating for 1N5358A/TR8?
The 1N5358A/TR8 has a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is verified in the Electrical Characteristics table and supports transient clamping in industrial power rails without device failure under standardized surge conditions.
How does thermal resistance affect 1N5358A/TR8 power handling?
With a junction-to-lead thermal resistance (RθJL) of 25 °C/W, the 1N5358A/TR8 rises 25 °C above lead temperature per watt dissipated. At 3/8″ (10 mm) lead length from body and TL < 25 °C, it safely handles 5 W; exceeding this requires active cooling or derating per Figure 1 in the datasheet to avoid junction overheating.
Is 1N5358A/TR8 RoHS compliant?
Yes - the "TR8" suffix indicates tape-and-reel packaging, and the base part 1N5358A is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5358Ae3/TR8). The datasheet confirms RoHS-compliant matte-tin plating per MIL-STD-750, and the device meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
1N5358A/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N5358A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5358A/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 1N5358A/TR8 reliable?
The price and inventory of 1N5358A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5358A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5358A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5358A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5358A/TR8?
1N5358A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5358A/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 1N5358A/TR8?
For technical support, including 1N5358A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5358A/TR8 requirements.
6.How does Aetrix verify that 1N5358A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5358A/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 1N5358A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5358A/TR8?
All 1N5358A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5358A/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 1N5358A/TR8 part is unused and in its original packaging.
Return procedure for 1N5358A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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