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Microchip Technology 1N5639A
- Part No.:
- 1N5639A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-13
- Datasheet:
-
1N5639A.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO13
- Quantity:
- Payment:
- Shipping:
Inventory:5,594
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Product details
Overview
1N5639A from Microchip Technology is a unidirectional transient voltage suppressor (TVS) diode in a hermetically sealed DO-13 metal package, designed for high-reliability surge protection in aerospace and industrial systems. It features a 14.5 V rated standoff voltage (VWM), 17.1 V minimum breakdown voltage (V(BR)), 25.2 V maximum clamping voltage (VC) at 59.5 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the 1N5639A datasheet, 1N5639A pinout, 1N5639A application, or 1N5639A equivalent, this device is selected for secondary lightning protection (IEC61000-4-5 Class 4 with 42 Ω source), ESD/EFT immunity (IEC61000-4-2/-4), and inductive switching transient suppression in avionics power rails and sensor interfaces where sub-100 ps response and radiation hardness are required.
Technical Context
The 1N5639A operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds V(BR) = 17.1–19.0 V, clamping transients to ≤25.2 V while conducting up to 59.5 A. Its hermetic DO-13 package ensures stable thermal resistance (50 °C/W junction-to-lead) and operation from –55 °C to +175 °C.
It delivers 1500 W non-repetitive peak pulse power under 10/1000 µs conditions with <100 ps response time, enabling protection against fast-rising ESD events and slower lightning-induced surges. Standby leakage remains ≤5 µA at 14.5 V VWM, supporting low-power system monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.5 V - Maximum continuous reverse operating voltage before conduction; matches 12 V rail systems with margin. |
| V(BR) min/max | 17.1 V / 19.0 V - Breakdown initiates within this range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPP | 25.2 V at 59.5 A - Clamped voltage during 10/1000 µs surge; ensures downstream ICs see <25.2 V stress. |
| PPP | 1500 W - Peak pulse power handling capability; supports IEC61000-4-5 Level 4 (42 Ω) secondary lightning. |
| ID @ VWM | ≤5 µA - Ultra-low leakage at rated standoff; avoids loading sensitive analog or standby circuits. |
| Response time | <100 ps - Near-instantaneous avalanche onset; protects against ESD per IEC61000-4-2 Contact ±8 kV. |
| Package | DO-13 (DO-202AA) - Hermetically sealed metal-glass case; enables high-reliability, radiation-hardened deployment. |
Pinout & Package
DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode connected to case and marked by diode symbol on body. Lead length ≥1.000″, case diameter 0.215–0.235″, weight ≈1.4 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Transient current return path | Connected to protected circuit ground; carries full surge current back to source during clamping. |
| Cathode (Lead 1 / Case) | High-side clamp node | Electrically tied to metal case; mounted to chassis ground or heatsink for lowest-inductance path and thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Clamps only reverse transients; preserves forward-biased signal integrity in DC power paths. |
| 1500 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges without degradation in avionics and industrial control cabinets. |
| Hermetic DO-13 metal package | Eliminates moisture ingress and outgassing risks; qualified for MIL-PRF-19500/500 JANTXV level reliability. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050; suitable for space-qualified subsystems and nuclear instrumentation. |
| IEC61000-4-2/-4/-5 compliance | Validated for ESD (±8 kV contact), EFT (±2 kV), and secondary lightning (Class 4, 42 Ω) per specification tables. |
Applications
| Aerospace Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12 V DC bus in airborne flight control units from load dump and induced RF coupling. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between bus and chassis ground to shunt transients before reaching regulators and FPGAs. Use Value: Sub-100 ps response prevents latch-up in downstream ASICs; DO-13 hermeticity ensures long-term reliability at altitude. |
Use Scenario: Safeguarding gate driver inputs in 3-phase inverters from commutation spikes and ground bounce. IC Role / Device Role / Timing Role: Transient suppressor across isolated logic supply rails to prevent false triggering of IGBT drivers. Use Value: 25.2 V clamping holds gate voltage below absolute max ratings; 1500 W rating absorbs repetitive 8.3 ms surge currents. |
| Railway Signaling Interface | Medical Imaging Sensor Front-End |
Use Scenario: Shielding 24 V signaling lines in trackside interlocking systems from traction current induction and lightning coupling. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) on each field line to chassis. Use Value: 14.5 V VWM aligns with 24 V nominal with 50% margin; Class 4 IEC61000-4-5 rating covers worst-case rail surge profiles. |
Use Scenario: Guarding low-noise analog front-end amplifiers in MRI gradient coil monitors from ESD during maintenance access. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) TVS on signal lines to preserve DC offset accuracy and SNR. Use Value: 5 µA standby current avoids input bias error; hermetic DO-13 eliminates humidity-related parameter drift over 15-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ15A | Surface-mount SMC package; 15 V VWM; 24.4 V VC @ 61.5 A; same 1500 W rating. | Requires PCB re-layout; lacks hermetic seal and radiation hardness; not MIL-qualified. | Select for cost-sensitive, high-volume industrial designs where DO-13 through-hole assembly is impractical. |
| 1N5639 | Commercial-grade version; wider V(BR) tolerance (16.2–19.8 V vs. 17.1–19.0 V); no military qualification. | Not approved for JANTXV-level programs; unsuitable for avionics DO-254 or MIL-HDBK-217F reliability modeling. | Choose only for non-safety-critical commercial equipment with relaxed parametric and qualification requirements. |
Compared with SMCJ15A and 1N5639, the 1N5639A uniquely combines hermetic DO-13 packaging, JANTXV qualification, radiation hardness, and tight 17.1–19.0 V V(BR) tolerance-making it irreplaceable in certified airborne, space, and nuclear-grade systems where long-term parameter stability and surge survivability are non-negotiable.
Availability
1N5639A is available at Aetrix Electronics and suitable for aerospace power distribution, industrial motor drive control, railway signaling interface, and medical imaging sensor front-end applications requiring stable component supply, long-term obsolescence management, and traceable military-grade sourcing.
Supply support for 1N5639A 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
Microchip Technology (formerly Microsemi) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5639A belongs to Microchip's legacy JAN/JANTXV-qualified TVS diode family, engineered specifically for mission-critical transient suppression in environments demanding hermetic sealing, extreme temperature operation, and proven radiation tolerance.
FAQ
What is the standoff voltage (VWM) of the 1N5639A and how does it relate to system design?
The 1N5639A has a rated standoff voltage (VWM) of 14.5 V, meaning it remains non-conductive up to this reverse DC or peak AC voltage. This value is selected to exceed typical 12 V rail voltages with sufficient margin to avoid leakage or premature clamping during normal operation while still engaging rapidly during transients. In system design, VWM must be ≥ the maximum continuous operating voltage of the protected line-ensuring the 1N5639A stays inert until a damaging surge occurs.
Is the 1N5639A suitable for bidirectional transient protection?
No, the 1N5639A is a unidirectional TVS diode, configured to clamp only reverse-polarity transients. Its cathode is internally connected to the metal case, making it unsuitable for bidirectional clamping without external circuitry. For bidirectional protection in the same DO-13 package, Microchip specifies the separate 1N6036–1N6072A series-not the 1N5639A. Using the 1N5639A in bidirectional applications risks failure during positive-going surges.
What is the clamping voltage (VC) of the 1N5639A and why does it matter in circuit protection?
The 1N5639A exhibits a maximum clamping voltage (VC) of 25.2 V at 59.5 A peak pulse current (10/1000 µs). This value represents the highest voltage imposed on the protected circuit during surge conduction. It matters because downstream components-such as microcontrollers, ADCs, or gate drivers-must withstand this clamped voltage without damage or functional interruption. A lower VC directly increases system robustness, and 25.2 V ensures compatibility with 3.3 V/5 V/12 V logic and power stages.
Does the 1N5639A meet IEC61000-4-5 for lightning surge immunity?
Yes, the 1N5639A is explicitly rated for IEC61000-4-5 secondary lightning protection. Per the datasheet, it supports Class 4 testing with a 42 Ω source impedance-covering the most severe common-mode surge levels applicable to industrial and transportation infrastructure. Its 1500 W peak pulse power and sub-100 ps response enable reliable clamping of 4 kV/2 kA waveforms without degradation, fulfilling immunity requirements for EN 61000-4-5-compliant designs.
How does the DO-13 hermetic package of the 1N5639A improve reliability over plastic alternatives?
The DO-13 hermetic metal-glass package of the 1N5639A prevents moisture ingress, halogen contamination, and internal corrosion-critical for deployments exceeding 15 years in humid, saline, or high-radiation environments. Unlike plastic-packaged TVS diodes, it maintains stable V(BR), VC, and leakage over temperature and time, and is qualified to MIL-PRF-19500/500 for JANTXV reliability. This makes the 1N5639A suitable for avionics, satellite subsystems, and nuclear instrumentation where parameter drift is unacceptable.
1N5639A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-13
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-13
1N5639A FAQ
1.How can I place an order for 1N5639A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5639A 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 1N5639A reliable?
The price and inventory of 1N5639A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5639A is usually 5 days.
3.What payment methods are accepted for 1N5639A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5639A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5639A?
1N5639A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5639A 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 1N5639A?
For technical support, including 1N5639A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5639A requirements.
6.How does Aetrix verify that 1N5639A is sourced from the original manufacturer or authorized distributors?
All 1N5639A 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 1N5639A meets industry standards.
7.What is the process for return or replacement of 1N5639A?
All 1N5639A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5639A, 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 1N5639A part is unused and in its original packaging.
Return procedure for 1N5639A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5639A Tags
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