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Microchip Technology 1N5361A/TR8
- Part No.:
- 1N5361A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5361A/TR8.pdf
- Description:
- DIODE ZENER 27V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,547
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Product details
Overview
1N5361A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 27 V, ±10% tolerance (A suffix), 50 mA test current, and 5.0 Ω maximum dynamic impedance at IZT. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies and analog sensor conditioning circuits.
For engineers reviewing the 1N5361A/TR8 datasheet, 1N5361A/TR8 pinout, 1N5361A/TR8 application, or 1N5361A/TR8 equivalent, key selection criteria include its 27 V Zener voltage, 5 W steady-state power rating at TL < 25 °C, 50 mA test current, 5.0 Ω dynamic impedance, and TR8 tape-and-reel packaging for automated assembly.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current variation (IZM = 120 mA at VZ = 27 V). Its low thermal resistance (25 °C/W junction-to-lead) enables high-current operation with minimal heatsinking when leads are trimmed to 10 mm.
The 1N5361A/TR8 exhibits minimal voltage drift versus temperature (ΔVZ = 0.60 V between 10% and 50% of IZM) and withstands non-recurrent 8.3 ms surge currents up to 120 A, making it suitable for transient suppression in DC rails where reliability under surge stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±10% - defines regulated output voltage under nominal bias; actual range is 24.3–29.7 V at 50 mA. |
| Test Current (IZT) | 50 mA - current at which VZ is specified; design must ensure stable bias within this operating point. |
| Dynamic Impedance (ZZ) | 5.0 Ω max - low AC impedance ensures minimal voltage shift under load transients. |
| Max Regulator Current (IZM) | 120 mA - maximum continuous DC current before exceeding 5 W power limit at 27 V. |
| Surge Current (IZSM) | 120 A (8.3 ms half-sine) - supports robust transient clamping without failure. |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead value enables direct thermal path to PCB copper or chassis when leads serve as heat sink. |
| Operating Temperature | –65 °C to +150 °C - qualified for harsh environments including automotive under-hood and industrial motor controls. |
Pinout & Package
Package: T-18 axial-leaded plastic case (UL94V-0 epoxy), cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference node | Connected to lower-potential rail; forms current path during Zener conduction. |
| Cathode (banded end) | Regulated output node | Provides stable 27 V reference when biased above breakdown; polarity must be observed strictly. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior, mechanical dimensions, and test methodology across global supply chain. |
| Moisture sensitivity Level 1 | No dry-pack required prior to soldering-reduces handling cost and eliminates bake step in SMT line. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly or field service. |
| High surge current capability | Withstands 120 A 8.3 ms surges-enables use as primary clamp in unregulated DC inputs without external TVS. |
| Tape-and-reel packaging (TR8) | Standard EIA-296 format supports high-speed pick-and-place placement; 8 mm carrier tape, 1000 pcs/reel. |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converters delivering 24 V DC output. IC Role / Device Role / Timing Role: Zener diode provides precise 27 V reference for optocoupler-based secondary-side regulation. Use Value: Maintains ±10% output accuracy over –40 °C to +85 °C ambient with no active compensation needed. |
Use Scenario: Biasing bridge sensors in engine control units requiring stable excitation voltage. IC Role / Device Role / Timing Role: Supplies regulated 27 V excitation to strain-gauge pressure transducers. Use Value: Delivers low-impedance reference despite battery voltage fluctuations (9–16 V) and load dump transients. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Clamping 24 V DC input rail against ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Shunts excess energy to ground when rail exceeds 29.7 V (VZmax). Use Value: Absorbs 5 W continuously and 120 A peak surges without derating or thermal runaway. |
Use Scenario: Setting trip point for comparator-based undervoltage lockout in telecom rectifiers. IC Role / Device Role / Timing Role: Provides accurate 27 V threshold reference to LM393 comparator input. Use Value: Enables repeatable 27 V detection with <0.6 V regulation error across full current range (10–120 mA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5361B/TR8 | ±5% tolerance (vs. ±10% for 1N5361A/TR8); same VZ, IZT, ZZ, and package. | Higher precision required in closed-loop feedback paths where tighter regulation reduces output variance. | Select 1N5361B/TR8 when system-level accuracy demands <±5% reference stability under varying load/temperature. |
| MMBZ5256BS-7-F | Surface-mount SOD-123 package; 27 V ±5%, 200 mW rating (vs. 5 W axial leaded). | Limited to low-power signal-level clamping; unsuitable for power rail regulation or surge absorption. | Choose MMBZ5256BS-7-F only for space-constrained PCBs where power dissipation ≤200 mW is sufficient. |
Compared with 1N5361B/TR8 and MMBZ5256BS-7-F, the 1N5361A/TR8 uniquely balances mid-precision regulation (±10%), high power handling (5 W), and axial-leaded manufacturability-making it optimal for industrial power modules requiring robustness and through-hole compatibility.
Availability
1N5361A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, and overvoltage protection circuits requiring stable component supply with JEDEC-standardized performance and TR8 tape-and-reel delivery.
Supply support for 1N5361A/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N5361A/TR8 belongs to Microsemi's legacy 5 W axial Zener family, designed specifically for ruggedized voltage regulation and transient suppression in mission-critical power systems where long-term stability and surge resilience are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5361A/TR8?
The 1N5361A/TR8 has a nominal Zener voltage of 27 V with a ±10% tolerance, meaning its actual breakdown voltage falls between 24.3 V and 29.7 V when measured at 50 mA and 25 °C lead temperature. This tolerance is designated by the "A" suffix per Microsemi's documentation and applies across the full operating temperature range.
Can the 1N5361A/TR8 be used in surface-mount designs?
No-the 1N5361A/TR8 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5361B series; however, those parts differ in power rating, thermal path, and mounting method, and are not drop-in replacements for the 1N5361A/TR8.
What is the maximum continuous current the 1N5361A/TR8 can handle?
The 1N5361A/TR8 supports a maximum continuous Zener current (IZM) of 120 mA when adequately heat sunk-calculated as P/VZmax = 5 W / 29.7 V. At ambient conditions on FR4 with standard copper pads, its steady-state power drops to 1.47 W, limiting usable current to ~54 mA without additional heatsinking.
Does the 1N5361A/TR8 require moisture preconditioning before reflow?
No-the 1N5361A/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and requires no dry-pack or baking prior to soldering. It withstands standard reflow profiles up to 260 °C for 10 seconds per MIL-STD-750 Method 2026.
How does the 1N5361A/TR8 perform under surge conditions?
The 1N5361A/TR8 is rated for 120 A non-recurrent surge current (IZSM) in an 8.3 ms half-sine waveform-verified per Microsemi's datasheet. This enables reliable clamping of automotive load-dump transients and industrial switching surges without degradation, provided the average power remains within 5 W limits.
1N5361A/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):
- 27 V
- Tolerance:
- ±10%
- 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
1N5361A/TR8 FAQ
1.How can I place an order for 1N5361A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5361A/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 1N5361A/TR8 reliable?
The price and inventory of 1N5361A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5361A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5361A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5361A/TR8 transactions.
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4.How is shipping managed for 1N5361A/TR8?
1N5361A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5361A/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 1N5361A/TR8?
For technical support, including 1N5361A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5361A/TR8 requirements.
6.How does Aetrix verify that 1N5361A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5361A/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 1N5361A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5361A/TR8?
All 1N5361A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5361A/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 1N5361A/TR8 part is unused and in its original packaging.
Return procedure for 1N5361A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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