My Inquiry
My Account
Microchip Technology 1N5356A/TR8
- Part No.:
- 1N5356A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356A/TR8.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,884
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5356A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 19 V, ±10% tolerance (A suffix), 65 mA test current (IZT), 3.0 Ω maximum dynamic impedance (ZZ), and 75 mA maximum regulator current (IZM). It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5356A/TR8 datasheet, 1N5356A/TR8 pinout, 1N5356A/TR8 application, or 1N5356A/TR8 equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC T-18 package details, and RoHS-compliant (e3) availability - all critical for stable 19 V regulation under variable load and temperature conditions.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage by conducting reverse current above its breakdown threshold. Its low 3.0 Ω dynamic impedance ensures minimal voltage variation across 10–50% of IZM, and its 25 °C/W junction-to-lead thermal resistance supports reliable 5 W operation with 3/8″ lead length heat sinking.
The device uses a void-free thermosetting epoxy case (UL94V-0), tin-lead or matte-tin plating per MIL-STD-750 Method 2026, and features cathode band polarity marking. It is moisture-sensitive Level 1 per J-STD-020B - no dry pack required - and rated for 260 °C soldering (10 s max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V ±10% - defines nominal regulation point; high-end tolerance is 20.9 V for IZM calculation |
| Test Current (IZT) | 65 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 3.0 Ω max - ensures ≤0.195 V change across 65 mA load step at IZT |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current at 25 °C lead temperature with adequate heatsinking |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - derates linearly above 25 °C per Figure 1; 1.47 W at TA = 25 °C on FR4 |
| Surge Current (IZSM) | 75 A - peak non-repetitive half-sine (8.3 ms) surge capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
JEDEC T-18 axial-leaded plastic package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g. Moisture sensitivity Level 1 - no dry pack required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal | Banded end; must be held ≥19 V above anode to initiate regulation; carries full IZ current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±10% voltage tolerance (A suffix) | Enables cost-optimized designs where tighter regulation is not required; simplifies BOM vs. ±5% (B) or ±2% (C) variants |
| 5.0 W power rating with 25 °C/W thermal resistance | Supports robust regulation in compact layouts when leads are extended 3/8″ from body; avoids need for PCB copper pour |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Eliminates requirement for handling precautions beyond standard static-safe protocols in assembly environments |
| RoHS-compliant (e3 suffix) option | Meets global environmental compliance without performance trade-off; same electrical and thermal specs as non-e3 versions |
| JEDEC-registered 1N53xx series | Guarantees mechanical and electrical interchangeability across authorized manufacturers and distributors |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp in DC-DC Converters |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converters operating from 24 V or 48 V input rails. IC Role / Device Role / Timing Role: Shunt regulator providing fixed 19 V reference to optocoupler input or TL431 bias network. Use Value: Maintains regulation within ±0.40 V across 7.5–37.5 mA load range, ensuring consistent loop gain and output accuracy. | Use Scenario: Protecting gate drivers or controller ICs from transient voltage spikes on 24 V auxiliary rails. IC Role / Device Role / Timing Role: Passive clamp limiting rail voltage to 19 V + ΔVZ during surge events. Use Value: Absorbs up to 75 A (8.3 ms half-sine) without failure, preventing latch-up or damage to downstream logic. |
| Temperature-Stable Sensor Biasing | Legacy Equipment Voltage Calibration |
Use Scenario: Providing excitation voltage to RTD or bridge sensor circuits requiring low-drift bias over –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Precision shunt reference with minimal VZ drift due to low ZZ and stable thermal path. Use Value: Delivers <0.40 V regulation error across operating current range, reducing sensor offset error contribution. | Use Scenario: Replacing obsolete Zeners in field-serviceable telecom or medical equipment requiring exact form-fit-function match. IC Role / Device Role / Timing Role: Direct drop-in replacement for legacy 1N5356A units in repair kits and spare parts inventory. Use Value: JEDEC T-18 footprint and identical electrical specs ensure zero rework or qualification delay for maintenance teams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B/TR8 | ±5% tolerance (19 V ±0.95 V), same VZ, IZT, ZZ, IZM, and package | Higher precision regulation needed for feedback loops with tight output tolerance (e.g., ±1%) | Select when improved voltage accuracy justifies minor cost increase and tighter tolerance is required in closed-loop control. |
| SMBJ5356A | Surface-mount SMB package, same 19 V ±10%, but lower IZM (65 mA), higher ZZ (4.0 Ω), and different thermal profile | Space-constrained PCBs where axial leads are incompatible with automated SMT assembly | Choose only if board layout mandates SMT; verify thermal performance with 1 oz Cu pad design per datasheet derating curves. |
Compared with 1N5356B/TR8, the 1N5356A/TR8 trades voltage accuracy for cost and legacy compatibility; compared with SMBJ5356A, it offers higher surge current rating and superior thermal dissipation in through-hole applications - making it preferred for industrial power and repair scenarios.
Availability
1N5356A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, sensor biasing networks, and legacy equipment repair requiring stable component supply and long-term obsolescence support.
Supply support for 1N5356A/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 discrete components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems - emphasizing thermal robustness, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5356A/TR8?
The 1N5356A/TR8 has a nominal Zener voltage of 19 V with a ±10% tolerance, as designated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ falls between 17.1 V and 20.9 V at 65 mA test current and 25 °C lead temperature. The tolerance directly impacts regulation accuracy in feedback or clamping applications and must be accounted for in worst-case circuit analysis for the 1N5356A/TR8.
How does thermal derating affect the 1N5356A/TR8's power handling?
The 1N5356A/TR8 is rated for 5.0 W at 25 °C lead temperature (TL), but power must be linearly derated above that point at 20 mW/°C - i.e., 4.5 W at TL = 50 °C. When mounted on FR4 with 1 oz Cu, its steady-state rating drops to 1.47 W at 25 °C ambient. Proper lead length (3/8″ from body) and ambient airflow are essential to sustain full 5 W operation for the 1N5356A/TR8.
Is the 1N5356A/TR8 RoHS compliant?
Yes - the "e3" suffix indicates RoHS compliance, and the 1N5356A/TR8 is manufactured with RoHS-compliant matte-tin plating on leads and UL94V-0 epoxy encapsulation. The e3 version maintains identical electrical, thermal, and mechanical specifications as non-RoHS variants, including 5.0 W power rating, 19 V Zener voltage, and JEDEC T-18 package dimensions - fully interchangeable for the 1N5356A/TR8.
What is the maximum surge current rating for the 1N5356A/TR8?
The 1N5356A/TR8 has a maximum non-repetitive surge current (IZSM) of 75 A, specified as a single 8.3 ms half-sine waveform. This rating enables the 1N5356A/TR8 to absorb transient energy from inductive switching or lightning-induced surges without degradation, provided the average power remains within derated limits and the surge interval allows sufficient cooling between events.
Can the 1N5356A/TR8 replace older 1N5356 units without redesign?
Yes - the 1N5356A/TR8 is a direct form-fit-function replacement for legacy 1N5356 units, retaining identical JEDEC T-18 package, axial lead configuration, cathode band marking, and electrical specifications. No PCB changes or schematic updates are required, making it ideal for repair, maintenance, and continuity programs where the original 1N5356A/TR8 matches historical bill-of-materials requirements.
1N5356A/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):
- 19 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13.7 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
1N5356A/TR8 FAQ
1.How can I place an order for 1N5356A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356A/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 1N5356A/TR8 reliable?
The price and inventory of 1N5356A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5356A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5356A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5356A/TR8?
1N5356A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5356A/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 1N5356A/TR8?
For technical support, including 1N5356A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356A/TR8 requirements.
6.How does Aetrix verify that 1N5356A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5356A/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 1N5356A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5356A/TR8?
All 1N5356A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356A/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 1N5356A/TR8 part is unused and in its original packaging.
Return procedure for 1N5356A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5356A/TR8 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
