My Inquiry
My Account
Microchip Technology 1N5369/TR8
- Part No.:
- 1N5369/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369/TR8.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,653
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5369/TR8 from Microsemi is a 51 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers 25 mA test current (IZT), 27 Ω dynamic impedance (ZZ), and 230 mA maximum Zener current (IZM) with cathode-band polarity marking.
For engineers reviewing the 1N5369/TR8 datasheet, 1N5369/TR8 pinout, 1N5369/TR8 application, or 1N5369/TR8 equivalent, this page provides verified electrical parameters, thermal derating behavior, JEDEC T-18 package details, and RoHS-compliant tape-and-reel availability - all critical for industrial power design, BOM validation, and long-life embedded system sourcing.
Technical Context
This device operates as a two-terminal voltage reference with fixed reverse-breakdown behavior. Its 51 V nominal Zener voltage is specified at 25 mA (IZT) with ±5% tolerance (B suffix), and exhibits 27 Ω dynamic impedance at IZT and 93 Ω knee impedance (ZZK) at 1 mA - enabling stable regulation across 10–50% of IZM.
Thermal performance is defined by 25 °C/W junction-to-lead resistance at 10 mm lead length, supporting up to 5 W steady-state dissipation at TL < 25 °C. When mounted on FR4 with 4 mm² copper pads, its derated power drops to 1.47 W at TA = 25 °C per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at 25 °C, measured 40 ±10 ms after DC current application - defines precise regulation setpoint for feedback networks. |
| Test Current (IZT) | 25 mA DC - standard operating point for VZ specification and impedance measurement. |
| Dynamic Impedance (ZZ) | 27 Ω at IZT - low AC resistance ensures minimal output voltage variation under load transients. |
| Max Zener Current (IZM) | 230 mA - maximum continuous DC current at TL < 25 °C; determines safe operating area with heat sinking. |
| Reverse Leakage (IR) | 0.5 μA max at VR = 38.8 V - confirms sharp knee and low standby loss in high-impedance bias networks. |
| Surge Current (IZSM) | 230 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure. |
| Voltage Regulation (ΔVZ) | 2.5 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity across operating range. |
Pinout & Package
JEDEC T-18 axial-leaded plastic package (void-free UL94V-0 epoxy body); cathode identified by colored band; leads plated with annealed matte tin (RoHS compliant per e3 suffix); 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 ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires anode at lower voltage than cathode. |
| Cathode | Zener breakdown terminal / regulated output reference | Banded end; connected to regulated rail or error amplifier input; supplies stable 51 V reference when reverse-biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard T-18 footprint and electrical behavior - ensures mechanical and functional compatibility across legacy designs. |
| ±5% voltage tolerance (B suffix) | Tighter regulation than ±10% (A) or ±20% (no suffix) variants - reduces need for post-regulation trimming in mid-precision applications. |
| Low 27 Ω dynamic impedance | Minimizes output voltage deviation under varying load currents - critical for stable feedback in switch-mode power supplies. |
| 230 A surge rating (8.3 ms) | Withstands common-line transients (e.g., IEC 61000-4-5 Level 3) without degradation - enables robust overvoltage protection without external crowbar. |
| Level 1 moisture sensitivity | No bake-out or dry-pack required before PCB assembly - simplifies manufacturing flow and reduces handling cost. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
Use Scenario: Regulating 51 V output in isolated flyback converter using optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference for TL431-like comparator input or direct shunt regulation. Use Value: Maintains ±1.5% output accuracy across line/load/temperature with 27 Ω ZZ limiting error amplifier input current variation. |
Use Scenario: Protecting 48 V DC bus against lightning-induced surges in telecom power systems. IC Role / Device Role / Timing Role: Passive shunt clamp activated above 51 V threshold to divert excess energy to ground. Use Value: Absorbs 230 A transient peaks without failure, limiting bus voltage to ≤53.5 V (VZ + ΔVZ) during 8.3 ms events. |
| Programmable Reference Source | Automotive ECU Voltage Monitor |
Use Scenario: Generating stable 51 V reference for ADC calibration or DAC output scaling in test equipment. IC Role / Device Role / Timing Role: High-stability DC reference source with low temperature coefficient (implied by tight tolerance and low ZZ). Use Value: Enables 12-bit measurement accuracy by holding reference drift below 0.1% over –40 to +125 °C operating range. |
Use Scenario: Monitoring 42 V auxiliary battery voltage in 48 V mild-hybrid vehicles to trigger undervoltage/overvoltage alarms. IC Role / Device Role / Timing Role: Threshold detector comparing sensed voltage against 51 V Zener reference via comparator. Use Value: Detects >53.5 V overvoltage condition with <10 μs response (limited only by RC time constant), meeting ISO 16750-2 pulse immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369B | Same 51 V ±5%, 5 W rating, but in bulk (non-tape-and-reel) packaging; no TR8 suffix. | Preferred for manual prototyping or low-volume hand-soldered assemblies where reel feeding is unnecessary. | Select 1N5369B when tape-and-reel automation is not required and cost-per-unit is prioritized over placement efficiency. |
| MMSZ5255B-TP | Surface-mount SOD-123 package; same 51 V ±5%, but rated at 500 mW (not 5 W); 30 Ω ZZ at 20 mA. | Suitable only for low-power biasing or signal-level clamping - cannot replace 1N5369/TR8 in power-stage regulation or surge handling. | Choose MMSZ5255B-TP only for space-constrained PCBs with <100 mA load current and no surge exposure; not a drop-in replacement. |
Compared with 1N5369B and MMSZ5255B-TP, the 1N5369/TR8 uniquely combines high-power 5 W dissipation, axial-leaded T-18 mechanical robustness, and factory-verified tape-and-reel compatibility (TR8) - making it the sole option for automated production of industrial power supplies requiring >200 mA regulated current and MIL-STD-750 ESD resilience.
Availability
1N5369/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection circuits, and automotive voltage monitoring systems requiring stable component supply, long-lifecycle support, and RoHS-compliant tape-and-reel delivery.
Supply support for 1N5369/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 1N53xxB series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems - emphasizing thermal stability, surge survivability, and JEDEC-standard mechanical interchangeability.
FAQ
What is the Zener voltage tolerance of 1N5369/TR8?
The 1N5369/TR8 has a ±5% Zener voltage tolerance, indicated by the "B" suffix in its full designation. This means its nominal 51 V breakdown voltage falls within 48.45 V to 53.55 V at 25 °C and 25 mA test current. The tolerance is guaranteed per JEDEC registration and verified during 100% lot testing - critical for designs requiring predictable regulation margins without post-assembly calibration.
Does 1N5369/TR8 require dry packing before PCB assembly?
No, the 1N5369/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored and assembled without baking or dry-packaging. Its void-free thermosetting epoxy body and matte-tin-plated leads ensure solderability stability even after extended ambient storage - reducing manufacturing overhead and eliminating moisture-related popcorning risk during reflow.
What is the maximum continuous power dissipation for 1N5369/TR8 on a standard FR4 board?
When mounted on FR4 with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5369/TR8 is rated for 1.47 W at TA = 25 °C. This derated value reflects its 85 °C/W junction-to-ambient thermal resistance under those conditions - not the full 5 W rating, which applies only with adequate heat sinking at the lead (25 °C/W junction-to-lead at 10 mm length).
Can 1N5369/TR8 be used as a direct replacement for 1N5369B?
Yes - the 1N5369/TR8 and 1N5369B share identical electrical specifications, thermal ratings, and T-18 package dimensions. The only difference is packaging: TR8 denotes tape-and-reel delivery (EIA-296 standard), while 1N5369B is supplied in bulk. No PCB layout or schematic changes are needed when switching between them.
What is the surge current rating of 1N5369/TR8 and how is it defined?
The 1N5369/TR8 has a peak non-recurrent surge current rating of 230 A, defined per Note 5 as the maximum amplitude of an 8.3 ms half-sine waveform. This rating is validated per MIL-STD-750 Method 3011 and ensures reliable clamping of common AC line transients without parametric shift or catastrophic failure - a key differentiator from lower-rated Zeners in industrial surge protection designs.
1N5369/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):
- 51 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 27 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 36.7 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
1N5369/TR8 FAQ
1.How can I place an order for 1N5369/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369/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 1N5369/TR8 reliable?
The price and inventory of 1N5369/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5369/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369/TR8?
1N5369/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369/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 1N5369/TR8?
For technical support, including 1N5369/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369/TR8 requirements.
6.How does Aetrix verify that 1N5369/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5369/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 1N5369/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5369/TR8?
All 1N5369/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369/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 1N5369/TR8 part is unused and in its original packaging.
Return procedure for 1N5369/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369/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…
