My Inquiry
My Account
Microchip Technology 1N5361B/TR12
- Part No.:
- 1N5361B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5361B/TR12.pdf
- Description:
- DIODE ZENER 27V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,312
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5361B/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 27 V, ±5% tolerance (B suffix), 50 mA test current (IZT), 5.0 Ω maximum dynamic impedance (ZZ), and 120 mA maximum Zener current (IZM) when adequately heat-sunk. 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 1N5361B/TR12 datasheet, 1N5361B/TR12 pinout, 1N5361B/TR12 application, or 1N5361B/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (4.1 A), reverse leakage (≤0.5 µA at 20.1 V), and RoHS-compliant e3 packaging with tape-and-reel (TR12) delivery.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable 27 V output across a wide operating current range (10%–50% of IZM). Its low dynamic impedance (5.0 Ω) ensures minimal voltage variation under load transients, and its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with standard 3/8″ lead length mounting.
The 1N5361B/TR12 features cathode band polarity marking, UL94V-0 void-free epoxy encapsulation, and MIL-STD-750 compliant matte-tin plating. It meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required-and withstands 8.3 ms half-sine surge currents up to 4.1 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, ±5% tolerance - defines precise regulation point for feedback loops and reference circuits. |
| Test Current (IZT) | 50 mA - standardized bias condition for measuring VZ and dynamic impedance. |
| Dynamic Impedance (ZZ) | 5.0 Ω max - ensures <0.25 V deviation per 50 mA load change near regulation point. |
| Max Zener Current (IZM) | 120 mA - maximum continuous DC current at 25 °C lead temperature, supporting 5 W power handling. |
| Reverse Leakage (IR) | ≤0.5 µA at 20.1 V - guarantees low standby power loss in high-impedance bias networks. |
| Surge Current (IZSM) | 4.1 A peak (8.3 ms half-sine) - enables transient overvoltage clamping without failure. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - allows full 5 W dissipation with minimal heatsinking at 3/8″ lead length. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or lower-potential rail; reverse-biased operation requires anode at lower voltage than cathode. |
| Cathode | Zener regulation terminal / Output reference node | Banded end; held at regulated 27 V above anode during reverse breakdown; used as voltage reference or clamp node. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard footprint and reliability validated per JEDEC 1N53xxB series specifications. |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants in feedback-sensitive applications. |
| Level 1 moisture sensitivity | No dry pack or baking required before PCB assembly-reduces manufacturing overhead and risk of popcorning. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly or field service. |
| e3 RoHS-compliant marking | Meets EU RoHS Directive 2011/65/EU; tin-only plating avoids lead-based solder compatibility issues. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in 24 V DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision 27 V reference source for TL431 or optocoupler bias networks. Use Value: Maintains ±0.25 V regulation over 10–60 mA load range due to 5.0 Ω ZZ, improving output accuracy by >0.5% vs. ±10% Zeners. |
Use Scenario: Clamping transient spikes on 24 V CAN bus power rails during load dump events. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 27 V to ground before downstream IC damage. Use Value: Withstands 4.1 A (8.3 ms) surges without degradation, exceeding ISO 7637-2 Pulse 5a requirements for automotive-grade clamping. |
| Programmable Logic Controller (PLC) Input Conditioning | Test Equipment Voltage Reference |
|
Use Scenario: Providing stable 27 V bias for opto-isolator input stages in 24 V digital input modules. IC Role / Device Role / Timing Role: Low-drift voltage reference ensuring consistent LED forward current across temperature. Use Value: ≤0.5 µA leakage at 20.1 V minimizes input current error in high-impedance sensing paths, preserving 12-bit ADC resolution. |
Use Scenario: Calibrating bench multimeters and programmable power supplies requiring traceable 27 V references. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade shunt-regulated reference circuits. Use Value: ±5% tolerance and <0.6 V regulation (ΔVZ) enable calibration accuracy within ±0.15 V over full operating current range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5361B (bulk) | Identical electrical specs; differs only in packaging-bulk vs. tape-and-reel (TR12). | No functional difference; TR12 enables automated pick-and-place assembly, while bulk supports manual or wave soldering. | Select 1N5361B/TR12 for SMT production lines requiring EIA-296 compliant reels; choose bulk for prototyping or low-volume hand assembly. |
| MMSZ5260B-TP (Micro Commercial) | Surface-mount SOD-123 package; same 27 V/±5%/5 W rating but higher ZZ (9 Ω) and lower IZM (70 mA). | Requires PCB redesign for SMT placement; unsuitable for high-current or high-surge applications where 1N5361B/TR12's 120 mA/4.1 A ratings are critical. | Choose MMSZ5260B-TP only when board space constraints mandate SMT; retain 1N5361B/TR12 for through-hole designs needing proven surge robustness and thermal margin. |
Compared with 1N5361B (bulk) and MMSZ5260B-TP, the 1N5361B/TR12 delivers identical regulation performance with factory-optimized tape-and-reel logistics for high-yield SMT assembly, while outperforming SMT alternatives in surge current handling and thermal dissipation capability.
Availability
1N5361B/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, PLC input conditioning, and test equipment voltage reference designs requiring stable component supply and long-term obsolescence management.
Supply support for 1N5361B/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, RF, and discrete components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized mechanical interoperability.
FAQ
What is the Zener voltage tolerance of the 1N5361B/TR12?
The 1N5361B/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix per Microsemi's datasheet Note 1. This means its actual regulation voltage falls between 25.65 V and 28.35 V at 50 mA test current and 25 °C lead temperature. The tolerance directly impacts reference accuracy in feedback circuits and must be accounted for in design margins.
Does the 1N5361B/TR12 require dry packing before reflow soldering?
No, the 1N5361B/TR12 has IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, meaning it may be stored and processed without dry packing or baking. Its void-free epoxy encapsulation prevents moisture ingress, eliminating popcorning risk during standard reflow profiles-verified in Microsemi's Rev D datasheet, page 1.
What is the maximum surge current rating for the 1N5361B/TR12?
The 1N5361B/TR12 is rated for 4.1 A peak non-recurrent surge current (IZSM) in an 8.3 ms half-sine waveform, as specified in the Electrical Characteristics table on page 2 of the Microsemi datasheet. This rating enables reliable transient suppression in automotive load-dump and industrial switching surge scenarios.
How does the thermal resistance of the 1N5361B/TR12 affect its power handling?
The 1N5361B/TR12 has a junction-to-lead thermal resistance of 25 °C/W at 3/8″ (10 mm) lead length. At 25 °C ambient, this allows full 5 W dissipation; derating begins above 25 °C per Figure 1. For FR4 boards with 1 oz copper, RθJA rises to 85 °C/W, limiting steady-state power to ~1.47 W unless enhanced copper area is used.
Is the 1N5361B/TR12 RoHS compliant?
Yes, the 1N5361B/TR12 carries the "e3" suffix per Microsemi's documentation, indicating RoHS compliance with lead-free matte-tin plating and UL94V-0 epoxy. This satisfies EU Directive 2011/65/EU and supports lead-free soldering processes without compromising solderability or reliability.
1N5361B/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):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 19.4 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
1N5361B/TR12 FAQ
1.How can I place an order for 1N5361B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5361B/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 1N5361B/TR12 reliable?
The price and inventory of 1N5361B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5361B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5361B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5361B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5361B/TR12?
1N5361B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5361B/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 1N5361B/TR12?
For technical support, including 1N5361B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5361B/TR12 requirements.
6.How does Aetrix verify that 1N5361B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5361B/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 1N5361B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5361B/TR12?
All 1N5361B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5361B/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 1N5361B/TR12 part is unused and in its original packaging.
Return procedure for 1N5361B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5361B/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…
