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Microchip Technology 1PMT5938BE3/TR7
- Part No.:
- 1PMT5938BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5938BE3/TR7.pdf
- Description:
- DIODE ZENER 36V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
1PMT5938BE3/TR7 from Microsemi is a 36 V ±5% surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 10.4 mA test current (IZT), 38 Ω dynamic impedance (ZZT), and 1 µA max reverse leakage at 27.4 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and ESD protection circuits.
For engineers reviewing the 1PMT5938BE3/TR7 datasheet, 1PMT5938BE3/TR7 pinout, 1PMT5938BE3/TR7 application, or 1PMT5938BE3/TR7 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or line conditions. Its Powermite® package features a full metallic bottom and integral heat sink locking tab, enabling efficient thermal conduction from junction to PCB via TAB 1 - the cathode terminal - with measured thermal resistance of 30°C/W.
The device exhibits tight voltage regulation with 38 Ω dynamic impedance at 10.4 mA IZT and maintains low reverse leakage (≤1 µA at VR = 27.4 V), supporting reliable clamping in transient suppression and reference applications across -55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - precise clamping threshold at 10.4 mA, suitable for 3.3 V–5 V rail protection with margin |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without external heatsink |
| Dynamic Impedance (ZZT) | 38 Ω at IZT = 10.4 mA - ensures minimal voltage shift under load variation |
| Reverse Leakage (IR) | ≤1 µA at VR = 27.4 V - guarantees low standby power loss in voltage reference circuits |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct thermal path to PCB copper for sustained power handling |
| ESD Rating | >16 kV HBM - provides robust electrostatic immunity during handling and system operation |
| Knee Current (IZK) | 0.25 mA - defines minimum current for stable regulation onset, critical for low-power biasing |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; mounting position unrestricted; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to large copper area for 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; reverse-biased configuration places cathode (TAB 1) at higher potential |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W capability traditionally found in larger DO-216 packages |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| Integral heat sink locking tab | Provides mechanical retention and direct thermal conduction path from junction to PCB ground plane |
| EIA-481 tape-and-reel packaging | Supports high-speed pick-and-place with 3,000 units per 7-inch reel, aligned with industry-standard SMT logistics |
Applications
| Power Supply Overvoltage Clamp | Industrial Sensor Reference |
|---|---|
Use Scenario: Protects 3.3 V or 5 V microcontroller I/O lines from surge events exceeding 27.4 V. IC Role / Device Role / Timing Role: Zener clamping diode placed between signal line and ground, conducting above 36 V to shunt excess energy. Use Value: Leverages 3.0 W power rating and 30°C/W thermal resistance to absorb repetitive transients without degradation. | Use Scenario: Provides stable 36 V reference for analog front-end calibration in factory automation sensors. IC Role / Device Role / Timing Role: Precision voltage reference source with ±5% tolerance and low 1 µA leakage at 27.4 V. Use Value: Ensures consistent ADC offset correction across -40°C to +85°C ambient due to low tempco design and 150°C max junction rating. |
| ESD Protection for USB Ports | DC-DC Converter Feedback Divider |
Use Scenario: Installed on USB 2.0 D+ and D− lines to suppress HBM ESD events up to 16 kV. IC Role / Device Role / Timing Role: Transient voltage suppressor leveraging >16 kV HBM rating and fast response in reverse breakdown. Use Value: Prevents latch-up in USB transceivers without adding series resistance that degrades signal integrity. | Use Scenario: Sets output voltage in isolated flyback converters using optocoupler feedback networks. IC Role / Device Role / Timing Role: High-stability Zener reference replacing TL431 where higher voltage (36 V) and higher power (3.0 W) are required. Use Value: Maintains regulation accuracy under load step changes thanks to 38 Ω dynamic impedance and 0.25 mA knee current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5938B | Same 36 V ±5%, but in DO-41 through-hole package; no metallic bottom or locking tab; 1.2 W rating | Requires manual or wave soldering; unsuitable for high-power SMT designs needing 3.0 W dissipation | Select 1PMT5938BE3/TR7 when automated assembly, thermal performance, or space-constrained layouts are required |
| BZX84-C36 | 36 V ±5%, SOT-23 package; 300 mW rating; 90 Ω ZZT; 100 nA IR at 28.8 V | Limited to low-energy clamping; inadequate for >100 mA surge currents or sustained regulation | Choose 1PMT5938BE3/TR7 for applications demanding >3× power handling and lower dynamic impedance |
Compared with 1N5938B and BZX84-C36, the 1PMT5938BE3/TR7 delivers triple the power rating, half the dynamic impedance, and integrated thermal management - making it the only option among the three capable of sustaining 3.0 W clamping in compact SMT layouts.
Availability
1PMT5938BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, medical sensor interfaces, and telecom infrastructure requiring stable component supply with full traceability and lifecycle support.
Supply support for 1PMT5938BE3/TR7 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 radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was engineered for high-power surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding environments - particularly where automated assembly and long-term reliability are critical.
FAQ
What is the zener voltage tolerance for 1PMT5938BE3/TR7?
The 1PMT5938BE3/TR7 has a nominal zener voltage of 36 V with a standard tolerance of ±5%, as specified in the MSC0995 datasheet. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the E3/TR7 variant uses the standard ±5% grade. This tolerance applies under test conditions of IZT = 10.4 mA and TAB temperature = 30°C.
How is thermal management handled in the 1PMT5938BE3/TR7 package?
The 1PMT5938BE3/TR7 uses the Powermite® package with a full metallic bottom and integral heat sink locking tab (TAB 1), achieving a junction-to-TAB thermal resistance of 30°C/W. Effective thermal management requires soldering TAB 1 to a minimum 100 mm² copper pad on the PCB. This design enables full 3.0 W dissipation at TAB = 60°C without additional heatsinking.
Is the 1PMT5938BE3/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5938BE3/TR7 is qualified for lead-free reflow soldering per J-STD-020. Its molded Powermite® package withstands peak temperatures up to 260°C for 10 seconds. The device is supplied in EIA-481-compliant tape-and-reel format (TR7 = 7-inch reel, 3,000 pieces), fully compatible with standard SMT pick-and-place and reflow equipment.
What is the maximum reverse leakage current for 1PMT5938BE3/TR7?
The maximum reverse leakage current (IR) for 1PMT5938BE3/TR7 is 1 µA at a reverse voltage (VR) of 27.4 V and ambient temperature of 30°C. This low leakage supports stable operation in precision reference and low-power standby circuits. Leakage increases with temperature and voltage, remaining within specification up to the full 150°C junction limit.
Does the 1PMT5938BE3/TR7 have an ESD rating, and if so, what is it?
Yes, the 1PMT5938BE3/TR7 has an ESD rating of >16 kV per the Human Body Model (HBM), as confirmed in the MSC0995 datasheet. This high rating results from the robust junction design and Powermite® package construction, making it suitable for use in systems exposed to frequent handling or electrostatic environments such as USB ports, industrial I/O modules, and field-deployable equipment.
1PMT5938BE3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 38 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 27.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-216AA
1PMT5938BE3/TR7 FAQ
1.How can I place an order for 1PMT5938BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5938BE3/TR7 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 1PMT5938BE3/TR7 reliable?
The price and inventory of 1PMT5938BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5938BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5938BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5938BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5938BE3/TR7?
1PMT5938BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5938BE3/TR7 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 1PMT5938BE3/TR7?
For technical support, including 1PMT5938BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5938BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5938BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5938BE3/TR7 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 1PMT5938BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5938BE3/TR7?
All 1PMT5938BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5938BE3/TR7, 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 1PMT5938BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5938BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5938BE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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