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Microchip Technology 1N5369BE3/TR8
- Part No.:
- 1N5369BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369BE3/TR8.pdf
- Description:
- DIODE ZENER 51V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,308
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Product details
Overview
1N5369BE3/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 2.5 V maximum voltage regulation (ΔVZ) across 10–50% of IZM, operating from –65°C to +150°C.
For engineers reviewing the 1N5369BE3/TR8 datasheet, 1N5369BE3/TR8 pinout, 1N5369BE3/TR8 application, or 1N5369BE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (230 A), reverse leakage (<0.5 µA at 40.8 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference with cathode-banded polarity, requiring reverse-bias connection where the banded end is positive relative to the anode. Its low 25 °C/W thermal resistance enables stable 5 W dissipation at TL < 25°C with 3/8" lead length, while its 85 °C/W junction-to-ambient rating applies to FR4 PCB mounting with defined copper pad geometry.
The 1N5369BE3/TR8 exhibits 27 Ω dynamic impedance at 25 mA test current and 2.5 V voltage regulation (ΔVZ) between 10% and 50% of maximum Zener current (IZM = 98 mA), confirming tight regulation under varying load conditions. Its 230 A non-repetitive surge rating (8.3 ms half-sine) supports transient overvoltage clamping in industrial power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% - precise reference for 48 V system regulation and feedback sensing |
| Test Current (IZT) | 25 mA - standardized bias point for impedance and voltage measurement |
| Dynamic Impedance (ZZ) | 27 Ω - low AC resistance ensures minimal output voltage variation under load transients |
| Max Regulator Current (IZM) | 98 mA - maximum continuous DC current at 25°C, derived from P/VZM = 5 W / 53.55 V |
| Voltage Regulation (ΔVZ) | 2.5 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 230 A - peak non-repetitive half-sine current (8.3 ms) for transient suppression |
| Reverse Leakage (IR) | <0.5 µA at 40.8 V - ensures negligible standby current in high-impedance reference paths |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, 0.7 g weight, cathode indicated by band. Leads are RoHS-compliant annealed matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to circuit ground or low-side reference | Forward voltage ≤1.2 V @ 1.0 A ensures minimal conduction loss during fault conditions |
| Cathode (banded end) | Current exit terminal in reverse bias; connected to regulated node or feedback input | Must be held positive relative to anode to maintain Zener breakdown; polarity reversal causes open-circuit behavior |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Validated mechanical and electrical compliance per industry standard DO-204AL outline |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision power supplies versus ±10% or ±20% variants |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables safe manual handling and board-level integration without special grounding protocols |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU with matte-tin plating, no lead or hazardous substances |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
|
Use Scenario: Used in optocoupler-coupled feedback loop of 48 V telecom rectifier to regulate output within ±1%. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier setpoint. Use Value: 2.5 V ΔVZ ensures stable regulation across 10–50% load steps; 27 Ω ZZ minimizes loop gain variation. |
Use Scenario: Placed across DC bus of motor drive inverter to clamp transients exceeding 60 V. IC Role / Device Role / Timing Role: Passive overvoltage protection element absorbing energy during IGBT switching spikes. Use Value: 230 A surge rating handles repetitive 8.3 ms transients; 51 V VZ aligns with 48 V system margin. |
| Programmable Reference Source | Automotive Battery Monitor |
|
Use Scenario: Paired with DAC and op-amp to generate adjustable 0–5 V reference for ADC calibration. IC Role / Device Role / Timing Role: Stable shunt reference providing temperature-invariant bias point. Use Value: –65°C to +150°C operating range supports extended temperature instrumentation; <0.5 µA IR prevents reference drift. |
Use Scenario: Monitoring 12 V battery rail in commercial vehicle ECU to detect overcharge (>15 V). IC Role / Device Role / Timing Role: Threshold detector triggering warning logic when battery exceeds safe voltage. Use Value: 51 V rating allows series stacking for higher thresholds; axial leads simplify through-hole mounting on ruggedized PCBs. |
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 (non-e3) | Same electrical specs but SnPb lead finish; not RoHS compliant | Restricted to legacy military/aerospace programs requiring tin-lead solder compatibility | Select only if RoHS exemption applies and SnPb assembly process is used |
| MMSZ5255B-TP (Micro Commercial) | Surface-mount SOD-123 package; 51 V ±5%, 200 mW rating; 30 Ω ZZ @ 20 mA | Not suitable for 5 W continuous dissipation; limited to low-power bias/reference use | Choose only for space-constrained PCBs where power < 0.2 W and thermal mass is insufficient for axial part |
Compared with 1N5369BE3/TR8, the 1N5369B lacks RoHS compliance but matches all electrical parameters, while MMSZ5255B-TP offers footprint reduction at the cost of 25× lower power handling and higher impedance-making it unsuitable as a direct replacement in 5 W applications.
Availability
1N5369BE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage protection circuits, and programmable reference sources requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1N5369BE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for robust, high-power voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized mechanical reliability.
FAQ
What is the Zener voltage tolerance of the 1N5369BE3/TR8?
The 1N5369BE3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 51 V rating falls within 48.45 V to 53.55 V at 25°C under specified test conditions. The tolerance is confirmed in Microsemi's official datasheet revision D (2008) and applies to all devices bearing the B suffix in the 1N5333B–1N5388B family.
Does the 1N5369BE3/TR8 require derating at elevated temperatures?
Yes, the 1N5369BE3/TR8 requires linear derating above 25°C ambient or lead temperature. Its 5 W power rating decreases by 40 mW/°C beyond 25°C when mounted with 3/8" lead length, reaching zero at 150°C. Derating curves are provided in Figure 1 of the Microsemi datasheet, and thermal resistance is specified as 25 °C/W junction-to-lead.
What does the "TR8" suffix indicate in 1N5369BE3/TR8?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape and 800 units per reel. This format supports automated SMT placement despite the device being axial-leaded - the reels contain pre-cut and tinned leads compatible with pick-and-place feeders calibrated for T-18 components.
Can the 1N5369BE3/TR8 be used in surface-mount designs?
No, the 1N5369BE3/TR8 is an axial-leaded T-18 package and is not surface-mount compatible. For SMT equivalents, Microsemi offers the SMBJ5369B or SMBG5369B in DO-214AA/DO-214AB packages - both rated for 5 W but with different thermal characteristics and footprint requirements than the 1N5369BE3/TR8.
What is the maximum reverse leakage current for the 1N5369BE3/TR8?
The maximum reverse leakage current (IR) for the 1N5369BE3/TR8 is 0.5 µA, measured at a reverse test voltage (VR) of 40.8 V - which is 80% of its nominal 51 V Zener voltage. This value is specified in the "ELECTRICAL CHARACTERISTICS" table of the Microsemi datasheet and reflects performance at 25°C.
1N5369BE3/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:
- ±5%
- 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
1N5369BE3/TR8 FAQ
1.How can I place an order for 1N5369BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369BE3/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 1N5369BE3/TR8 reliable?
The price and inventory of 1N5369BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5369BE3/TR8?
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1N5369BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369BE3/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 1N5369BE3/TR8?
For technical support, including 1N5369BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369BE3/TR8 requirements.
6.How does Aetrix verify that 1N5369BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5369BE3/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 1N5369BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5369BE3/TR8?
All 1N5369BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369BE3/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 1N5369BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5369BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369BE3/TR8 Tags
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