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Microchip Technology 1N5358E3/TR8
- Part No.:
- 1N5358E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5358E3/TR8.pdf
- Description:
- DIODE ZENER 22V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,384
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Product details
Overview
1N5358E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 22 V, ±5% tolerance (B-suffix equivalent), 50 mA test current, 3.5 Ω maximum dynamic impedance at IZT, and 75 mA maximum Zener current (IZM) 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 1N5358E3/TR8 datasheet, 1N5358E3/TR8 pinout, 1N5358E3/TR8 application, or 1N5358E3/TR8 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), surge current rating (4.7 A), RoHS compliance (e3 suffix), and tape-and-reel packaging (TR8 suffix).
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased mode, with cathode indicated by a band and requiring the banded end to be held positive relative to the anode. Its regulation performance is defined at 25 °C lead temperature, with voltage regulation (ΔVZ) specified as 0.45 V between 10% and 50% of IZM.
It features low thermal resistance (25 °C/W junction-to-lead at 3/8″ lead length), moisture sensitivity level 1 per J-STD-020B (no dry pack required), and withstands 8.3 ms half-sine surge currents up to 4.7 A. Forward voltage is ≤1.2 V at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, ±5% tolerance - defines stable regulation point for precision reference designs |
| Test Current (IZT) | 50 mA - operating point at which VZ and ZZ are specified; sets minimum bias requirement |
| Dynamic Impedance (ZZ) | 3.5 Ω max at IZT - determines output voltage variation under load transients |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current before thermal runaway, assuming proper heat sinking |
| Surge Current (IZSM) | 4.7 A peak (8.3 ms half-sine) - supports transient overvoltage clamping in protection circuits |
| Voltage Regulation (ΔVZ) | 0.45 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design with discrete lead-mounting; requires ≥10 mm lead length from body |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode identified by color band. Leads are annealed matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to lower-potential node; carries full Zener current in regulation mode |
| Cathode | Reverse-bias reference terminal | Banded end; connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant construction | e3 suffix confirms lead-free matte-tin plating and halogen-free epoxy, meeting EU Directive 2011/65/EU |
| Tape-and-reel packaging | TR8 suffix indicates EIA-296 standard reel format (8 mm tape, 1000 pcs/reel) for automated assembly |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - no special handling required during board assembly |
| Moisture sensitivity | Level 1 per IPC/JEDEC J-STD-020B - zero floor life limitation; no baking prior to reflow |
| High surge capability | Withstands 4.7 A non-recurrent 8.3 ms half-sine surge - suitable for input-stage transient suppression |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing precise 22 V setpoint for TL431 or optocoupler bias networks. Use Value: Maintains ±0.45 V regulation across 7.5–37.5 mA load range, enabling <±1% output voltage accuracy over temperature and line variations. | Use Scenario: Clamping induced surges on 24 V DC control bus lines in PLC backplanes. IC Role / Device Role / Timing Role: Passive shunt clamp absorbing transient energy exceeding 22 V threshold without active control. Use Value: Limits bus voltage to ≤22.45 V during 4.7 A/8.3 ms surges, protecting downstream 24 V-rated logic and analog inputs. |
| Temperature-Stable Sensor Bias | Programmable Voltage Threshold Detector |
Use Scenario: Providing excitation voltage to RTD or thermistor bridges in industrial temperature transmitters. IC Role / Device Role / Timing Role: Low-drift Zener reference sourcing stable 22 V bias current independent of supply ripple. Use Value: Delivers <0.02%/°C voltage drift over −65 °C to +150 °C due to low thermal resistance and intrinsic Zener temperature coefficient compensation. | Use Scenario: Setting trip point for comparator-based undervoltage lockout (UVLO) in battery-powered equipment. IC Role / Device Role / Timing Role: Precision threshold reference connected to comparator inverting input; triggers shutdown below 22 V. Use Value: Enables repeatable 22 V ±1.1 V activation threshold with <0.45 V hysteresis margin, preventing chatter during brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5358B | Same 22 V, ±5%, 5 W rating, but leaded bulk packaging (no e3/TR8); tin-lead plating | Lacks RoHS compliance and tape-and-reel automation support; requires manual or tube-fed placement | Select 1N5358B only for legacy non-RoHS production or prototyping where reflow compatibility is not required |
| SMBJ5358B | Surface-mount SMB package; identical electrical specs but 110 °C/W junction-to-ambient (FR4); 1.5 A surge rating | Not pin-compatible; requires PCB redesign; lower thermal performance without heatsinking | Choose SMBJ5358B only when board space constraints mandate SMT and thermal derating to ≤1.5 W is acceptable |
Compared with 1N5358B and SMBJ5358B, the 1N5358E3/TR8 uniquely combines RoHS compliance, tape-and-reel automation readiness, and high thermal efficiency (25 °C/W) in an axial-leaded form-making it optimal for high-reliability industrial power modules requiring long-term supply continuity and lead-free manufacturing.
Availability
1N5358E3/TR8 is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and temperature-stable sensor bias applications requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5358E3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and extended temperature operation from −65 °C to +150 °C.
FAQ
What is the Zener voltage tolerance of the 1N5358E3/TR8?
The 1N5358E3/TR8 has a nominal Zener voltage of 22 V with ±5% tolerance, consistent with the B-suffix variant in the 1N5333B–1N5388B family. This tolerance is confirmed in the manufacturer's electrical characteristics table and applies across the full operating temperature range of −65 °C to +150 °C. The e3/TR8 suffix does not alter voltage tolerance-it only denotes RoHS compliance and tape-and-reel packaging.
How is thermal management handled for the 1N5358E3/TR8 in high-power operation?
The 1N5358E3/TR8 achieves 5 W dissipation via low thermal resistance: 25 °C/W junction-to-lead when leads are trimmed to 3/8″ (10 mm) from the body. For sustained operation, heat sinking must be applied to the leads-not the body-and ambient temperature must remain ≤25 °C on FR4 board (where derated power drops to 1.47 W). Derating curves in Figure 1 of the datasheet define safe operating area versus lead temperature.
Does the 1N5358E3/TR8 require moisture preconditioning before reflow soldering?
No, the 1N5358E3/TR8 has moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. The void-free UL94V-0 epoxy encapsulation eliminates moisture ingress risk, and the device withstands 260 °C for 10 seconds per MIL-STD-750 Method 2026-fully compatible with standard lead-free reflow profiles.
What is the maximum surge current rating for the 1N5358E3/TR8, and how is it defined?
The 1N5358E3/TR8 is rated for 4.7 A peak non-recurrent surge current (IZSM), defined as the maximum amplitude of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without failure-critical for input-stage clamping in 24 V industrial systems. Surge testing follows JEDEC standards and assumes device is at room temperature with no pre-existing thermal stress.
Can the 1N5358E3/TR8 be used as a direct replacement for the 1N5358B in existing designs?
Yes, the 1N5358E3/TR8 is electrically and mechanically identical to the 1N5358B except for RoHS-compliant matte-tin plating (vs. tin-lead) and tape-and-reel packaging (TR8 vs. bulk). No PCB layout changes are needed. However, reflow profile must be adjusted for lead-free solder compatibility, and procurement must account for EIA-296 tape specifications rather than tube or bulk formats.
1N5358E3/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:
- ±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
1N5358E3/TR8 FAQ
1.How can I place an order for 1N5358E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5358E3/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 1N5358E3/TR8 reliable?
The price and inventory of 1N5358E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5358E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5358E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5358E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5358E3/TR8?
1N5358E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5358E3/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 1N5358E3/TR8?
For technical support, including 1N5358E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5358E3/TR8 requirements.
6.How does Aetrix verify that 1N5358E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5358E3/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 1N5358E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5358E3/TR8?
All 1N5358E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5358E3/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 1N5358E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5358E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5358E3/TR8 Tags
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