My Inquiry
My Account
Microchip Technology 1N5366C/TR12
- Part No.:
- 1N5366C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366C/TR12.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,198
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5366C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 39 V, ±2% tolerance (C suffix), 30 mA test current (IZT), 14 Ω dynamic impedance (ZZ), and maximum reverse leakage of 0.5 μA at 29.7 V (VR). 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 1N5366C/TR12 datasheet, 1N5366C/TR12 pinout, 1N5366C/TR12 application, or 1N5366C/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (170 A), voltage regulation (ΔVZ = 3.1 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current variation (IZM = 170 mA at TL < 25 °C). Its low dynamic impedance (14 Ω) and tight ±2% VZ tolerance ensure minimal voltage drift under load changes.
Designed for axial-lead through-hole mounting on FR4 PCBs with 4 mm² copper pads, it delivers 39 V regulation with 0.5 μA IR at VR = 29.7 V and withstands 8.3 ms half-sine surge currents up to 170 A - critical for transient suppression in DC power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±2% - precise regulation point for feedback loops and reference circuits |
| Test Current (IZT) | 30 mA - operating point where VZ and ZZ are specified; defines stable bias condition |
| Dynamic Impedance (ZZ) | 14 Ω - low AC resistance ensures minimal voltage shift under varying load current |
| Max Reverse Leakage (IR) | 0.5 μA at 29.7 V - ultra-low off-state current preserves efficiency in standby modes |
| Max Regulator Current (IZM) | 170 mA - maximum continuous DC current at TL < 25 °C with adequate heat sinking |
| Surge Current (IZSM) | 170 A (8.3 ms half-sine) - handles short-duration transients without failure |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
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 | Forward conduction terminal / low-voltage side | Connected to circuit ground or lower potential node during Zener operation |
| Cathode (banded end) | Zener regulation terminal / high-voltage side | Connected to unregulated input; reverse-biased to maintain 39 V reference at cathode relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in analog sensing and feedback paths |
| 25 °C/W junction-to-lead thermal resistance | Supports 5 W dissipation with simple lead-length heat sinking (3/8″ from body), reducing need for PCB copper pours |
| Moisture sensitivity Level 1 (J-STD-020B) | No dry pack required - simplifies handling, storage, and assembly logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant e3 marking | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated 48 V DC-DC converters for factory automation controllers. IC Role / Device Role / Timing Role: Zener diode providing precise 39 V reference to error amplifier input in secondary-side regulation loop. Use Value: ±2% VZ tolerance and 14 Ω ZZ minimize output voltage drift across line/load/temperature, improving system accuracy to ±0.5%. |
Use Scenario: Protecting 36 V nominal battery-backed telemetry modules against load-dump surges. IC Role / Device Role / Timing Role: Shunt clamp device limiting bus voltage to 39 V during 100 V/50 ms transients. Use Value: 170 A surge rating and 3.1 V ΔVZ ensure clamping remains predictable and non-destructive under repeated stress events. |
| Programmable Logic Controller Input Protection | Test Equipment Voltage Calibration Standard |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring faults and induced noise. IC Role / Device Role / Timing Role: Reverse-biased Zener absorbing >30 V transients before they reach optocoupler input stage. Use Value: 0.5 μA IR at 29.7 V prevents false triggering during normal operation while enabling fast response to overvoltage. |
Use Scenario: Serving as traceable 39 V reference in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Primary voltage standard in benchtop calibration circuit with temperature-stable biasing. Use Value: Low 25 °C/W thermal resistance and ±2% tolerance support <±0.1% absolute accuracy when operated at fixed TL. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B/TR12 | ±5% VZ tolerance (vs. ±2% for 1N5366C/TR12); otherwise identical electrical specs and package | Acceptable where cost-sensitive designs tolerate wider regulation spread (e.g., non-critical bias networks) | Select 1N5366B/TR12 only if ±5% VZ meets system accuracy budget and BOM cost reduction is prioritized |
| MMSZ5267ET1G | Surface-mount SOD-123 package (vs. axial T-18); 39 V ±5%, 200 mW rating (vs. 5 W); higher ZZ (~35 Ω) | Limited to low-power signal-level clamping; unsuitable for power rail regulation or surge handling | Choose MMSZ5267ET1G only for space-constrained PCBs where power dissipation ≤200 mW and ±5% tolerance is acceptable |
Compared with 1N5366B/TR12 and MMSZ5267ET1G, the 1N5366C/TR12 uniquely delivers ±2% precision, 5 W power handling, and axial-lead robustness - making it the sole option for high-reliability industrial voltage references requiring both accuracy and surge resilience.
Availability
1N5366C/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, and programmable logic controller input protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5366C/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB/C series was designed specifically for ruggedized voltage regulation in harsh-environment power systems - emphasizing thermal stability, surge immunity, and long-term parametric consistency under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5366C/TR12?
The 1N5366C/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi's documentation. This means its nominal 39 V regulation point falls within 38.22 V to 39.78 V at 25 °C with 30 mA test current - critical for high-accuracy reference designs where tighter tolerance avoids calibration overhead.
How much power can the 1N5366C/TR12 dissipate continuously?
The 1N5366C/TR12 is rated for 5.0 W steady-state power dissipation at lead temperature (TL) below 25 °C with 3/8″ (10 mm) lead length from the body. Derating applies above 25 °C per Figure 1 in the datasheet; at TA = 25 °C on FR4, max power drops to 1.47 W due to higher junction-to-ambient thermal resistance (85 °C/W).
What does the "TR12" suffix mean in 1N5366C/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format supports automated SMT placement equipment and ensures consistent feeding during high-volume manufacturing - distinct from bulk or ammo-pack variants used in manual or low-volume assembly.
Is the 1N5366C/TR12 RoHS compliant?
Yes, the 1N5366C/TR12 is RoHS compliant, confirmed by the "e3" marking in Microsemi's official documentation. Its leads feature RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026, and the void-free epoxy body meets UL94V-0 flammability requirements without brominated flame retardants.
What is the maximum reverse leakage current for the 1N5366C/TR12?
The maximum reverse leakage current (IR) for the 1N5366C/TR12 is 0.5 μA, measured at VR = 29.7 V (75% of nominal VZ). This ultra-low leakage ensures minimal power loss in high-impedance bias networks and prevents false triggering in protection circuits operating near the Zener knee region.
1N5366C/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):
- 39 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 28.1 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
1N5366C/TR12 FAQ
1.How can I place an order for 1N5366C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366C/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 1N5366C/TR12 reliable?
The price and inventory of 1N5366C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5366C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5366C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5366C/TR12?
1N5366C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366C/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 1N5366C/TR12?
For technical support, including 1N5366C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366C/TR12 requirements.
6.How does Aetrix verify that 1N5366C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5366C/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 1N5366C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5366C/TR12?
All 1N5366C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366C/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 1N5366C/TR12 part is unused and in its original packaging.
Return procedure for 1N5366C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5366C/TR12 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…
