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Microchip Technology 1N5361B/TR8
- Part No.:
- 1N5361B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5361B/TR8.pdf
- Description:
- DIODE ZENER 27V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,406
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Product details
Overview
1N5361B/TR8 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/TR8 datasheet, 1N5361B/TR8 pinout, 1N5361B/TR8 application, or 1N5361B/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (4.1 A), reverse leakage at VR = 20.1 V (≤0.5 µA), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
The 1N5361B/TR8 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.
Designed for axial-lead through-hole mounting on FR4 PCBs with 1 oz copper, it delivers 1.47 W steady-state power at TA = 25 °C and requires no dry pack (Moisture Sensitivity Level 1 per J-STD-020B). Cathode polarity is marked by a band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% at 50 mA - defines precise regulation point for feedback loops and reference circuits |
| Power Dissipation | 5.0 W at TL = 25 °C (3/8″ lead length) - sets thermal design boundary for heatsinking requirements |
| Dynamic Impedance (ZZ) | 5.0 Ω max at IZT = 50 mA - determines output voltage stability under varying load current |
| Max Reverse Current (IR) | ≤0.5 µA at VR = 20.1 V - ensures low quiescent power loss in standby or high-impedance bias networks |
| Surge Current (IZSM) | 4.1 A peak (8.3 ms half-sine) - enables transient overvoltage clamping without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - allows direct thermal path modeling for lead-mounted thermal management |
| Operating Temperature | –65 °C to +150 °C - supports deployment in automotive engine compartments and industrial enclosures |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band, RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener regulation | Must be held at potential ≤ (VZ − 1.2 V) to avoid forward conduction; defines ground/reference return path |
| Cathode | Current exit terminal in reverse bias; connected to regulated output node | Banded end must be held at higher potential than anode by ≥27 V to enter regulation; serves as stable voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision analog circuits versus ±10% or ±20% variants |
| Low dynamic knee impedance (ZZK ≤ 0.60 Ω @ 1 mA) | Enables stable regulation even at very low bias currents, supporting ultra-low-power monitoring |
| Moisture Sensitivity Level 1 | Eliminates baking requirement prior to reflow, simplifying assembly for high-reliability production |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Permits handling without special static control in standard manufacturing environments |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference source for optocoupler-coupled feedback loop. Use Value: 27 V regulation with 5.0 Ω ZZ maintains <±0.1 V output deviation across 10–60 mA load swing. |
Use Scenario: Protecting microcontroller I/O pins against 30 V transients induced by relay coil flyback. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage to safe level during surge events. Use Value: 4.1 A surge rating absorbs 8.3 ms half-sine energy without degradation, preserving downstream logic. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Setting threshold voltage for comparator-based battery charge termination. IC Role / Device Role / Timing Role: Stable reference input to comparator with minimal drift over temperature. Use Value: ΔVZ ≤ 0.60 V (10%–50% IZM) ensures consistent trip point across –40 °C to +85 °C ambient. |
Use Scenario: Establishing fixed bias current for linear regulator pass transistor base drive. IC Role / Device Role / Timing Role: Current-setting element in emitter-follower bias string. Use Value: Low IR (≤0.5 µA at 20.1 V) minimizes error contribution in high-impedance bias networks. |
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 (ammo pack vs. tape-and-reel TR8) | No functional difference; TR8 enables automated pick-and-place, bulk supports manual/hand-solder prototyping | Select 1N5361B/TR8 for SMT production lines requiring reel-fed placement; choose bulk for low-volume assembly or repair |
| MMSZ5258B-TP (Micro Commercial) | Same 27 V ±5%, but 500 mW SOD-123 package; 10× lower power rating and 300 °C/W thermal resistance | Suitable only for signal-level references or low-current bias; cannot replace 1N5361B/TR8 in 5 W power regulation | Use MMSZ5258B-TP only where power dissipation remains <0.5 W; retain 1N5361B/TR8 for >1 W continuous Zener current |
Compared with 1N5361B (bulk) and MMSZ5258B-TP, the 1N5361B/TR8 uniquely combines JEDEC-standardized 5 W power handling, axial-leaded mechanical robustness, and tape-and-reel automation compatibility-making it the sole choice for high-reliability, medium-power through-hole Zener applications requiring volume manufacturability.
Availability
1N5361B/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5361B/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized, high-stability voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and long-term parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5361B/TR8?
The 1N5361B/TR8 has a nominal Zener voltage of 27 V with a tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This tolerance applies at 50 mA test current and 25 °C lead temperature. The 1N5361B/TR8 achieves this specification using tightly controlled diffusion processes and post-trim screening, ensuring predictable regulation in feedback and reference circuits.
Can the 1N5361B/TR8 be used in surface-mount designs?
No-the 1N5361B/TR8 is an axial-leaded T-18 package intended for through-hole mounting. Microsemi offers surface-mount equivalents such as SMBJ5361B for SMC packages, but the 1N5361B/TR8 itself requires lead-forming and hole-mounting. Attempting SMT reflow on the 1N5361B/TR8 would exceed its 260 °C/10 s solder limit and compromise epoxy integrity.
What is the maximum steady-state power dissipation of the 1N5361B/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5361B/TR8 delivers 1.47 W steady-state power at TA = 25 °C. This value derives from its 85 °C/W junction-to-ambient thermal resistance and is confirmed in Microsemi's derating curve (Figure 1). Exceeding this requires forced air or external heatsinking.
Does the 1N5361B/TR8 require moisture preconditioning before reflow soldering?
No-the 1N5361B/TR8 carries Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it is not moisture-sensitive and requires no dry pack or baking prior to soldering. Its void-free thermosetting epoxy body inherently resists moisture absorption, enabling direct use from sealed tape-and-reel packaging.
How does the 1N5361B/TR8 perform under transient surge conditions?
The 1N5361B/TR8 is rated for 4.1 A peak non-recurrent surge current (IZSM) in an 8.3 ms half-sine waveform-validated per JEDEC standards. This capability allows it to safely clamp inductive kickback and ESD-like transients without parametric shift or catastrophic failure, making it suitable for protecting sensitive downstream circuitry in motor drives and relay interfaces.
1N5361B/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N5361B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5361B/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 1N5361B/TR8 reliable?
The price and inventory of 1N5361B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5361B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5361B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5361B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5361B/TR8?
1N5361B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5361B/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 1N5361B/TR8?
For technical support, including 1N5361B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5361B/TR8 requirements.
6.How does Aetrix verify that 1N5361B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5361B/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 1N5361B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5361B/TR8?
All 1N5361B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5361B/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 1N5361B/TR8 part is unused and in its original packaging.
Return procedure for 1N5361B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5361B/TR8 Tags
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