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Microchip Technology 1N3336
- Part No.:
- 1N3336
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
1N3336.pdf
- Description:
- DIODE ZENER 68V 50W DO5
- Quantity:
- Payment:
- Shipping:
Inventory:7,462
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Product details
Overview
1N3336 from Microsemi is a hermetically sealed, 50 W, 68 V Zener diode in DO-5 (DO-203AB) metal-glass package with anode-to-case polarity, rated for junction temperatures from –65 °C to +175 °C and designed for high-reliability voltage regulation in power supply crowbar circuits, overvoltage protection, and precision reference applications requiring stable breakdown under high-current transients.
For engineers reviewing the 1N3336 datasheet, 1N3336 pinout, 1N3336 application, or 1N3336 equivalent, key selection criteria include its 68 V nominal Zener voltage at 8 mA test current, 180 Ω maximum dynamic impedance at IZT, ±5% voltage tolerance (B suffix), 50 W DC power dissipation at TC < 75 °C, and thermal resistance of 2.0 °C/W junction-to-base - all critical for thermal-aware crowbar and clamp designs.
Technical Context
This device operates as a high-power, temperature-stable voltage reference using silicon Zener breakdown in a welded metal-glass DO-5 package. Its low thermal resistance (2.0 °C/W max) enables sustained 50 W dissipation when mounted on a heatsink, while its ±5% tolerance (B suffix) and 0.090 %/°C typical temperature coefficient ensure predictable regulation across industrial temperature ranges.
The 1N3336 exhibits a sharp breakdown knee with ZZT = 180 Ω at IZT = 8 mA and ZZK = 8.0 Ω at IZK = 5 mA, supporting both precision clamping and coarse overvoltage limiting. Its standard anode-to-case polarity simplifies mounting to grounded heat sinks in high-side protection configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 68 V at 8 mA test current - defines precise clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 50 W at case temperature < 75 °C - requires mechanical mounting and heatsinking for full-rated operation |
| Zener Impedance (ZZT) | 180 Ω max at IZT = 8 mA - ensures minimal voltage shift under varying load currents |
| Thermal Resistance (RθJC) | 2.0 °C/W max junction-to-hexagonal base - enables direct thermal path to chassis or heatsink |
| Temperature Coefficient (αVZ) | +0.090 %/°C typical - supports stable regulation across –65 °C to +175 °C operating range |
| Zener Test Current (IZT) | 8 mA - standardized bias point for VZ measurement and impedance characterization |
| Reverse Leakage (IR) | 10 µA max at 51.7 V - confirms low off-state conduction below breakdown threshold |
Pinout & Package
Package: DO-5 (DO-203AB), hermetically sealed metal-glass stud package with 11/16″ hexagonal base, 1/4-28 threaded stud, and anode-to-case polarity (standard configuration). Weight: 15 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Case (Stud) | Anode | Electrically connected to anode; must be mounted to heatsink/chassis ground for standard polarity operation |
| Lead (Wire) | Cathode | Isolated cathode terminal; connects to regulated node or protection circuit input |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic metal-glass seal | Enables operation in harsh environments including vacuum, humidity, and radiation-prone systems per MicroNote 050 |
| Internal solder bond construction | Provides robust mechanical and thermal interconnect between die and stud, minimizing bond fatigue under thermal cycling |
| JAN/JANTX/JANTXV qualification option | Supports MIL-PRF-19500/358 screening for aerospace and defense programs requiring extended reliability testing |
| Low ESD sensitivity (MIL-STD-750 Method 1020) | Eliminates need for external ESD handling controls during assembly and field service |
| Standard anode-to-case polarity | Simplifies grounding scheme in high-side crowbar circuits where case is tied to system ground or chassis |
Applications
| Industrial Power Supply Protection | Aerospace Crowbar Circuits |
|---|---|
|
Use Scenario: High-current DC power supply output stage subjected to transient overvoltage events exceeding 100 V. IC Role / Device Role / Timing Role: Zener diode acting as primary shunt regulator and crowbar trigger element. Use Value: 1N3336 clamps at 68 V with 50 W capability and 2.0 °C/W thermal resistance, enabling reliable fault detection without thermal runaway. |
Use Scenario: Redundant avionics bus protection requiring fail-safe shutdown upon overvoltage detection. IC Role / Device Role / Timing Role: Precision voltage reference triggering SCR-based crowbar in flight-critical power distribution units. Use Value: ±5% tolerance and +0.090 %/°C tempco ensure consistent trip point across –55 °C to +125 °C operational envelope. |
| Test Equipment Voltage Reference | Military Radar Modulator Clamping |
|
Use Scenario: Calibration-grade bench power supply requiring stable, repeatable output voltage reference under variable load. IC Role / Device Role / Timing Role: Primary Zener reference in feedback loop of linear regulator or error amplifier. Use Value: Low dynamic impedance (180 Ω) and sharp knee ensure minimal regulation error across 1–10 mA operating range. |
Use Scenario: Pulsed radar transmitter modulator exposed to repetitive 5–10 kV transients during switching. IC Role / Device Role / Timing Role: High-energy clamp protecting gate drivers and pulse transformers from voltage overshoot. Use Value: Hermetic DO-5 package withstands shock, vibration, and outgassing requirements per MIL-STD-883. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3336B (same part, alternate suffix) | Identical electrical specs; B suffix denotes ±5% VZ tolerance (confirmed in datasheet Table, Page 2) | No functional difference - B is the standard tolerance grade for this part number | Select 1N3336B when ±5% tolerance is required; non-suffixed 1N3336 implies ±20% and is not recommended for precision use |
| 1N3335B | 62 V nominal VZ, 200 Ω ZZT, 7 mA IZT - lower voltage, higher impedance than 1N3336 | Used where 62 V clamping is sufficient and tighter voltage margin is acceptable | Choose 1N3335B only if system overvoltage threshold is ≤62 V; not interchangeable due to 6 V VZ offset and derated thermal performance |
Compared with 1N3336, the 1N3336B variant guarantees ±5% tolerance essential for calibrated references, while 1N3335B offers a lower-voltage alternative with reduced thermal margin - neither is pin-compatible nor electrically substitutable without circuit revalidation.
Availability
1N3336 is available at Aetrix Electronics and suitable for industrial power supply protection, aerospace crowbar circuits, and test equipment voltage reference applications requiring stable component supply, long-term obsolescence management, and traceable military-grade sourcing.
Supply support for 1N3336 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 1N3336 belongs to Microsemi's legacy high-power Zener diode family, engineered for ruggedized voltage regulation in mission-critical systems where hermetic sealing, radiation hardness, and thermal stability are mandatory design requirements.
FAQ
What is the Zener voltage tolerance for 1N3336?
The 1N3336 part number without a suffix specifies ±20% Zener voltage tolerance per datasheet Note 1. For precision applications, the 1N3336B variant (±5%) is the recommended version. The 1N3336B is explicitly listed in the Electrical Characteristics table on Page 2 with VZ = 68 V and tolerance confirmed as ±5%.
Does 1N3336 have anode-to-case or cathode-to-case polarity?
The 1N3336 has standard anode-to-case polarity, meaning the metal stud (case) is electrically connected to the anode terminal. This is stated in the FEATURES section and confirmed in the MECHANICAL AND PACKAGING section. Reverse polarity versions require the "R" suffix (e.g., 1N3336RB).
What is the maximum power dissipation of 1N3336 and at what temperature?
The 1N3336 delivers 50 W DC power dissipation at case temperature (TC) below 75 °C. Above that, it derates linearly at 0.5 W/°C, reaching zero dissipation at 175 °C. This rating assumes proper mounting to a heatsink with low thermal interface resistance, as specified in the MAXIMUM RATINGS table.
Can 1N3336 be used in surface-mount designs?
No - the 1N3336 is exclusively available in the through-hole DO-5 (DO-203AB) metal-glass stud package. The datasheet explicitly states "Consult factory for surface mount equivalents," confirming no SMT variant exists for this part number. Board-level integration requires mechanical mounting hardware and chassis grounding.
What is the thermal resistance specification for 1N3336?
The 1N3336 has a maximum junction-to-hexagonal base thermal resistance (RθJB) of 2.0 °C/W, with a typical value of 1.5 °C/W. This parameter is critical for thermal design and is measured from the silicon junction to the outer surface of the metal stud, as defined in the MAXIMUM RATINGS section.
1N3336 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-203AB, DO-5, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±20%
- Power - Max:
- 50 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 51.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 10 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- DO-5 (DO-203AB)
1N3336 FAQ
1.How can I place an order for 1N3336 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3336 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 1N3336 reliable?
The price and inventory of 1N3336 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3336 is usually 5 days.
3.What payment methods are accepted for 1N3336?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3336 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3336?
1N3336 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3336 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 1N3336?
For technical support, including 1N3336 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3336 requirements.
6.How does Aetrix verify that 1N3336 is sourced from the original manufacturer or authorized distributors?
All 1N3336 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 1N3336 meets industry standards.
7.What is the process for return or replacement of 1N3336?
All 1N3336 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3336, 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 1N3336 part is unused and in its original packaging.
Return procedure for 1N3336:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3336 Tags
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