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Microchip Technology 1N2825BE3
- Part No.:
- 1N2825BE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- TO-204AD
- Datasheet:
-
1N2825BE3.pdf
- Description:
- DIODE ZENER 36V 10W TO204AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,890
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Product details
Overview
1N2825BE3 from Microsemi is a 50 W, 36 V ±5% Zener diode in TO-204AD (TO-3) package, qualified to MIL-PRF-19500/114 JANTX level, with 350 mA Zener test current, 3.5 Ω dynamic impedance at IZT, and -65 °C to +175 °C junction temperature range. It delivers stable voltage regulation in high-reliability power supply and reference circuits requiring hermetic sealing and radiation hardness.
For engineers reviewing the 1N2825BE3 datasheet, 1N2825BE3 pinout, 1N2825BE3 application, or 1N2825BE3 equivalent, this part supports precision DC voltage clamping, overvoltage protection, and reference stabilization in aerospace, defense, and industrial systems where thermal robustness and military-grade qualification are mandatory.
Technical Context
This device operates as a high-power, hermetically sealed Zener diode with anode-to-case polarity (standard, no "R" suffix), designed for regulated DC voltage reference and transient suppression in thermally demanding environments. Its low 2.0 °C/W junction-to-case thermal resistance enables full 50 W dissipation when mounted on a heatsink at TC ≥ 75 °C.
The 1N2825BE3 exhibits a nominal Zener voltage of 36 V at 350 mA test current, with 3.5 Ω dynamic impedance (ZZT) and a positive temperature coefficient of +0.093 %/°C - enabling predictable drift behavior in temperature-varying applications. Reverse leakage is limited to 10 µA at 27.4 V (VR = 0.76 × VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% at 350 mA - defines precise clamping threshold for overvoltage protection and reference stability. |
| Power Dissipation | 50 W average @ TC ≥ 75 °C - supports high-energy regulation without derating below 75 °C case temperature. |
| Thermal Resistance | 2.0 °C/W junction-to-case - enables efficient heat transfer to external heatsink, critical for sustained 50 W operation. |
| Dynamic Impedance | 3.5 Ω at IZT = 350 mA - ensures minimal output voltage variation under load current changes. |
| Junction Temperature | -65 °C to +175 °C - allows deployment in extreme environmental conditions including space and engine bay applications. |
| Reverse Leakage | 10 µA max at VR = 27.4 V - guarantees low standby power loss and high off-state blocking integrity. |
| Temperature Coefficient | +0.093 %/°C - provides predictable, monotonic VZ drift for compensated reference designs. |
Pinout & Package
Package: TO-204AD (TO-3), hermetically sealed metal can with 0.052″ diameter solderable pins; weight ≈15 g; anode internally connected to case (standard polarity); pins 1 and 2 internally shorted per Figure 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Case (Metal Can) | Anode | Primary current return path; must be electrically connected to system ground or negative rail for proper biasing. |
| Pin 1 & Pin 2 | Common Cathode | Internally joined; serves as single cathode terminal - requires connection to regulated positive node or voltage source. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic weld seal | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments. |
| MIL-PRF-19500/114 JANTX qualification | Validated reliability for defense/aerospace programs requiring screening, lot traceability, and extended temperature performance. |
| RoHS-compliant e3 finish | Tin plating meets lead-free assembly requirements while maintaining solderability per MIL-STD-750 method 2026. |
| Low RθJC (2.0 °C/W) | Enables direct bolt-down mounting to chassis or heatsink without thermal interface material degradation concerns. |
| Radiation-hardened construction | Inherent tolerance to total ionizing dose (TID), validated per Microsemi MicroNote 050 - suitable for space electronics. |
Applications
| High-Voltage Power Supply Regulation | Aerospace Reference Voltage Source |
|---|---|
|
Use Scenario: Stabilizing 36 V rail in satellite power conditioning units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Primary Zener reference element providing fixed 36 V clamp against input transients and load-induced ripple. Use Value: Maintains <±0.5% output stability across -55 °C to +125 °C ambient due to low dynamic impedance and predictable αVZ. |
Use Scenario: Generating a precision 36 V reference for ADC biasing and sensor excitation in flight control computers. IC Role / Device Role / Timing Role: Passive voltage reference node with zero active circuitry - eliminates noise and drift sources inherent in IC references. Use Value: Delivers <10 µA leakage and <3.5 Ω impedance, enabling sub-LSB accuracy in 16-bit data acquisition systems. |
| Military Grade Overvoltage Protection | Industrial Motor Drive Snubber |
|
Use Scenario: Clamping induced surges on 28 V DC distribution buses in armored vehicle electronics. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing >500 J surge energy via controlled avalanche conduction. Use Value: Withstands repeated 50 W pulses and maintains specification after MIL-STD-750 method 1020 ESD testing. |
Use Scenario: Suppressing flyback voltage spikes across IGBT collectors in 480 V AC motor inverters. IC Role / Device Role / Timing Role: High-energy Zener clamp limiting peak collector voltage to 36 V during switching transitions. Use Value: 2.0 °C/W thermal resistance allows direct heatsink mounting, sustaining repetitive 350 mA clamping current without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N2825B | No RoHS compliance (non-e3 finish); identical electrical specs and TO-3 package. | Acceptable where lead-free assembly is not required and legacy tin-lead solder process is used. | Select 1N2825B only if RoHS exemption applies and tin-lead reflow is standard in production. |
| 1N2825RB | Reverse polarity (cathode-to-case); same VZ, IZT, ZZT, and power rating. | Required when circuit topology mandates cathode grounding or case-isolated mounting. | Choose 1N2825RB when mechanical layout or grounding scheme requires case-connected cathode instead of anode. |
Compared with 1N2825BE3, the 1N2825B lacks RoHS compliance but offers identical performance in non-lead-free lines, while 1N2825RB provides identical regulation capability with reversed terminal polarity - both require verification of mounting configuration and solder process compatibility.
Availability
1N2825BE3 is available at Aetrix Electronics and suitable for high-reliability power supply regulation, aerospace reference design, and military-grade overvoltage protection requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N2825BE3 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-tolerant, and military-qualified analog and mixed-signal components.
The 1N2825BE3 belongs to Microsemi's legacy MIL-PRF-19500/114-qualified Zener diode family, engineered for voltage regulation in mission-critical systems where hermeticity, thermal resilience, and long-term parametric stability are non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N2825BE3?
The 1N2825BE3 has a nominal Zener voltage of 36 V with a ±5% tolerance, as indicated by the "B" suffix in its JEDEC nomenclature. This means the actual measured VZ at 350 mA test current falls between 34.2 V and 37.8 V under standard thermal conditions (TC = 30 °C ±3 °C). The tolerance is guaranteed per MIL-PRF-19500/114 screening for JANTX-qualified units.
Does 1N2825BE3 have reverse polarity?
No, the 1N2825BE3 uses standard polarity: anode is internally connected to the metal case. Reverse polarity (cathode-to-case) is designated by the "R" suffix - e.g., 1N2825RBE3. The absence of "R" in 1N2825BE3 confirms anode-to-case configuration, verified in the Part Nomenclature section and Figure 2 of the T4-LDS-0076 datasheet.
What is the maximum Zener current (IZM) for 1N2825BE3 at 75 °C?
The maximum DC Zener current (IZM) for 1N2825BE3 is 90 mA when operated at a case temperature of 75 °C. This value is derived from the 50 W power rating and accounts for VZ increase due to Zener impedance and junction heating. At lower case temperatures, IZM increases linearly per the 0.5 W/°C derating factor above 75 °C.
Is 1N2825BE3 suitable for surface-mount assembly?
No, the 1N2825BE3 is packaged in TO-204AD (TO-3), a through-hole metal-can package with 0.052″ diameter leads. It requires bolt-down or screw-mount mechanical attachment to a heatsink and is incompatible with reflow or wave soldering processes intended for SMT components. Its design mandates chassis-level thermal management, not PCB-level mounting.
What does the "e3" suffix mean on 1N2825BE3?
"e3" denotes RoHS-compliant matte-tin plating on the leads and case of the 1N2825BE3, meeting EU Directive 2011/65/EU. This finish is available only on commercial-grade versions; military-qualified variants (JAN/JANTX/JANTXV) retain traditional tin-lead plating. The e3 marking confirms compatibility with lead-free soldering processes per MIL-STD-750 method 2026.
1N2825BE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-204AD
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 10 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 27.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 2 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-204AD (TO-3)
1N2825BE3 FAQ
1.How can I place an order for 1N2825BE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N2825BE3 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 1N2825BE3 reliable?
The price and inventory of 1N2825BE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N2825BE3 is usually 5 days.
3.What payment methods are accepted for 1N2825BE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N2825BE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N2825BE3?
1N2825BE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N2825BE3 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 1N2825BE3?
For technical support, including 1N2825BE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N2825BE3 requirements.
6.How does Aetrix verify that 1N2825BE3 is sourced from the original manufacturer or authorized distributors?
All 1N2825BE3 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 1N2825BE3 meets industry standards.
7.What is the process for return or replacement of 1N2825BE3?
All 1N2825BE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N2825BE3, 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 1N2825BE3 part is unused and in its original packaging.
Return procedure for 1N2825BE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N2825BE3 Tags
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