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Microchip Technology 1PMT5938/TR7
- Part No.:
- 1PMT5938/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5938/TR7.pdf
- Description:
- DIODE ZENER 36V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,115
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Product details
Overview
1PMT5938B from Microsemi is a 36 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, delivering 3.0 W power dissipation with 10.4 mA test current (IZT), 38 Ω dynamic impedance (ZZT), and 1.0 µA max reverse leakage at 27.4 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5938B datasheet, 1PMT5938B pinout, 1PMT5938B application, or 1PMT5938B equivalent, key selection factors include its 3.0 W thermal capability with TAB-1 heat sinking, DO-216 mechanical outline, ESD rating >16 kV HBM, and tight zener voltage stability under 30°C tab temperature conditions.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 36 V at 10.4 mA IZT and exhibits 38 Ω dynamic impedance, indicating stable regulation under small-signal AC variations. Its 30°C/W junction-to-TAB thermal resistance enables effective heat transfer to PCB copper when TAB 1 is soldered to a thermal pad.
The device features a full metallic bottom and integral locking tab for mechanical retention and flux-free assembly, and is rated for -55°C to +150°C junction/storage temperature. Reverse leakage remains ≤1.0 µA up to 27.4 V, supporting low-power standby circuit integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% at 10.4 mA IZT - sets precise clamping/reference level in feedback or protection circuits |
| Power Dissipation | 3.0 W with TAB 1 at 60°C - enables high-energy transient suppression without external heatsink |
| Dynamic Impedance (ZZT) | 38 Ω at 10.4 mA - ensures minimal output voltage variation under load current ripple |
| Reverse Leakage (IR) | ≤1.0 µA at 27.4 V - preserves battery life and signal integrity in low-current monitoring paths |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - allows direct thermal coupling to PCB copper for reliable power handling |
| ESD Rating | >16 kV per HBM - provides robustness against handling and system-level electrostatic events |
| Knee Current (IZK) | 0.25 mA - defines minimum current for stable regulation onset, critical for low-power biasing |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and integral heat-sinking locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 per DO-216 mechanical drawing |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint smaller than DO-41 |
| Integral heat-sink locking tab | TAB 1 acts as both cathode and primary thermal interface-no separate heatsink required |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| ESD robustness | >16 kV HBM rating reduces risk of field failure in handling and unshielded environments |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) for high-accuracy reference applications |
Applications
| DC Power Rail Protection | Feedback Reference in SMPS |
|---|---|
Use Scenario: Clamping 48 V telecom line surges to protect downstream LDOs and microcontrollers. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector on primary-side DC bus. Use Value: 3.0 W dissipation and 36 V clamping threshold allow absorption of 10/1000 µs transients without degradation. | Use Scenario: Providing stable 36 V reference for optocoupler-based feedback in isolated flyback converters. IC Role / Device Role / Timing Role: Precision voltage reference setting secondary-side regulation point. Use Value: 38 Ω dynamic impedance ensures <±0.5% output voltage drift across load and line variations. |
| Low-Power Sensor Biasing | Industrial PLC Input Conditioning |
Use Scenario: Biasing analog sensor bridges where supply headroom is limited to 3.3 V or 5 V. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) Zener providing stable excitation voltage. Use Value: Sub-microamp reverse current prevents loading error in high-impedance Wheatstone bridge outputs. | Use Scenario: Level-shifting and overvoltage protection for 24 V digital inputs in factory automation controllers. IC Role / Device Role / Timing Role: Clamp diode limiting input voltage to safe range for FPGA I/O banks. Use Value: >16 kV HBM ESD rating withstands repeated hot-plug and cable discharge events in industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ36A | TVS diode (unidirectional), 36 V standoff, 600 W peak pulse power, higher leakage (~1 µA at 29.1 V) | Designed for transient suppression only-not suitable for continuous voltage reference | Select only for surge-only protection; not interchangeable for regulation or biasing roles |
| BZX84-C36 | SOT-23 package, 36 V ±5%, 300 mW power, 90 Ω ZZT, no integral heat sink | Limited to low-power biasing; cannot sustain 3.0 W continuous dissipation | Use where space is constrained and power <0.5 W; avoid in high-current or thermally demanding layouts |
Compared with SMCJ36A and BZX84-C36, the 1PMT5938B uniquely combines 3.0 W continuous Zener regulation, DO-216 thermal performance, and sub-µA leakage-making it the only choice for high-stability, medium-power reference or clamping where thermal management and DC accuracy are co-critical.
Availability
1PMT5938B is available at Aetrix Electronics and suitable for DC power rail protection, SMPS feedback reference, low-power sensor biasing, and industrial PLC input conditioning requiring stable component supply across extended production cycles.
Supply support for 1PMT5938B 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 series was engineered for surface-mount power regulation and protection in space-constrained, thermally demanding applications-delivering through-hole-level power handling in SMT form factor.
FAQ
What is the maximum continuous power dissipation for 1PMT5938B?
The 1PMT5938B supports 3.0 W continuous power dissipation when TAB 1 is maintained at ≤60°C. This requires adequate PCB copper area and thermal via design. Derating applies above 60°C tab temperature per the device's 30°C/W thermal resistance specification. The 1PMT5938B must not exceed this limit to ensure long-term reliability and voltage stability.
How is the cathode identified on the 1PMT5938B package?
The cathode of the 1PMT5938B is designated by TAB 1-the large metallic bottom pad-which must be connected to the more positive potential in reverse-bias operation. Lead 2 is the anode. This polarity is confirmed in the MSC0995.PDF mechanical drawing and electrical test setup diagrams. Correct orientation is essential for proper 1PMT5938B function in clamping or reference circuits.
Does 1PMT5938B meet industry ESD standards?
Yes, the 1PMT5938B has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as verified in Microsemi's characterization testing. This makes the 1PMT5938B suitable for use in environments prone to static discharge, including automated assembly lines and field-deployed industrial equipment, without requiring additional ESD protection circuitry.
Can 1PMT5938B be used as a precision voltage reference?
The 1PMT5938B offers ±5% initial tolerance and 38 Ω dynamic impedance, making it suitable for moderate-accuracy references. For higher precision, Microsemi offers 1PMT5938C (±2%) and 1PMT5938D (±1%). The 1PMT5938B's thermal coefficient and stability under varying IZT should be evaluated per Micro Note 202 when used in reference designs.
What tape-and-reel packaging options are available for 1PMT5938B?
The 1PMT5938B is supplied in EIA-481-compliant tape-and-reel packaging: 3,000 pieces per 7-inch reel and 12,000 pieces per 13-inch reel. Both configurations support standard SMT pick-and-place equipment. Reel markings include device number and date code, and packaging complies with moisture sensitivity level (MSL) requirements for surface-mount assembly.
1PMT5938/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:
- ±20%
- 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
1PMT5938/TR7 FAQ
1.How can I place an order for 1PMT5938/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5938/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 1PMT5938/TR7 reliable?
The price and inventory of 1PMT5938/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5938/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5938/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5938/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5938/TR7?
1PMT5938/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5938/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 1PMT5938/TR7?
For technical support, including 1PMT5938/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5938/TR7 requirements.
6.How does Aetrix verify that 1PMT5938/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5938/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 1PMT5938/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5938/TR7?
All 1PMT5938/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5938/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 1PMT5938/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5938/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5938/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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