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Microchip Technology 1PMT5935C/TR7
- Part No.:
- 1PMT5935C/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5935C/TR7.pdf
- Description:
- DIODE ZENER 27V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,608
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Product details
Overview
1PMT5935C/TR7 from Microsemi is a 27 V, ±1% tolerance Zener diode in the Powermite® surface-mount package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 23 Ω dynamic impedance at 13.9 mA test current and thermal resistance of 30°C/W junction-to-tab - used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1PMT5935C/TR7 datasheet, 1PMT5935C/TR7 pinout, 1PMT5935C/TR7 application, or 1PMT5935C/TR7 equivalent, key selection factors include its tight 1% voltage tolerance (suffix C), low 23 Ω Zener impedance, ESD rating >16 kV HBM, full metallic bottom for flux-free assembly, and compatibility with automated insertion equipment.
Technical Context
This Zener diode operates as a two-terminal voltage reference device with cathode designated by TAB 1, requiring no external biasing. Its Powermite® package integrates a locking tab that functions as both mechanical anchor and heat sink, enabling direct thermal conduction from junction to PCB copper via the metallic bottom.
It delivers stable 27 V regulation under DC conditions at IZT = 13.9 mA, with knee current IZK = 0.25 mA and knee impedance ZZK = 700 Ω - ensuring reliable turn-on behavior even at low currents. Reverse leakage remains ≤1 µA at VR = 20.6 V, supporting low-power standby regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 27 V ±1% at IZT = 13.9 mA - enables precise feedback sensing in 24 V system regulators. |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - supports high-energy transient clamping without derating in compact layouts. |
| Dynamic Impedance ZZT | 23 Ω at 13.9 mA - ensures minimal output voltage variation under load current changes. |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - allows direct thermal path to PCB ground plane for sustained power handling. |
| ESD Rating | >16 kV per Human Body Model - provides robust handling safety during SMT assembly and field operation. |
| Reverse Leakage IR | ≤1 µA at VR = 20.6 V - maintains low quiescent current in battery-backed or energy-sensitive circuits. |
Pinout & Package
Package: Powermite® surface-mount molded case with full metallic bottom and integral locking tab; cathode identified by TAB 1; weight ≈ 0.016 g; compliant with EIA-481 tape-and-reel (7″ reel: 3,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and voltage reference node; must be connected to low-impedance ground or heatsink plane. |
| Lead 2 | Anode | Signal input terminal; reverse-biased connection point for regulation or clamping function. |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3 W power handling in footprint smaller than DO-214AC. |
| Integral heat sink locking tab | Provides mechanical retention during reflow and reduces thermal resistance by direct metal-to-PCB contact. |
| Full metallic bottom | Eliminates solder flux entrapment risk - critical for high-reliability automotive and industrial assemblies. |
| 1% Zener voltage tolerance (suffix C) | Supports tighter regulation margins in closed-loop DC-DC converters without post-calibration. |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Regulating feedback voltage in isolated 24 V DC-DC converter secondary side. IC Role / Device Role / Timing Role: Zener reference diode providing stable 27 V clamp for optocoupler-based error amplifier input. Use Value: 1% tolerance and 23 Ω ZZT ensure ±0.27 V regulation accuracy across temperature, minimizing output drift. | Use Scenario: Providing reference voltage for microcontroller ADC monitoring of 12 V battery rail. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known 27 V reference for ratiometric scaling. Use Value: >16 kV HBM ESD rating prevents latch-up during vehicle jump-start events or load-dump transients. |
| Telecom Surge Protection | Medical Equipment Overvoltage Clamp |
Use Scenario: Clamping induced surges on 24 V telecom line interface cards. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing transient energy before downstream ICs. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow safe dissipation of 10/1000 µs surge pulses up to 15 A peak. | Use Scenario: Protecting analog front-end inputs in portable ultrasound devices from accidental 30 V misconnection. IC Role / Device Role / Timing Role: Fail-safe voltage limiter preventing damage to low-voltage op-amps and ADCs. Use Value: ≤1 µA reverse leakage at 20.6 V preserves signal integrity and battery life in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF27A (ON Semiconductor) | 27 V, ±5%, 200 W peak pulse power, DO-219AB package, 1.1 mm height - higher surge capability but looser tolerance. | Better suited for transient suppression only; not recommended where 1% DC regulation accuracy is required. | Select when surge immunity dominates over DC precision. |
| BZX84-C27 (Diodes Inc.) | 27 V, ±5%, 300 mW, SOT-23 package - lower power, higher ZZT (~50 Ω), no integrated heat sink tab. | Limited to low-power signal-level clamping; cannot replace 1PMT5935C/TR7 in 3 W power regulation roles. | Select only for space-constrained, low-current bias networks. |
Compared with SMF27A and BZX84-C27, the 1PMT5935C/TR7 uniquely combines 1% DC voltage accuracy, 3.0 W continuous dissipation, and integrated thermal management - making it the only choice for high-stability, high-power Zener regulation in industrial and automotive control modules.
Availability
1PMT5935C/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom surge protectors, and medical equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for 1PMT5935C/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 designed specifically for surface-mount applications demanding high power density, robust thermal performance, and assembly reliability - targeting power conversion, protection, and precision reference use cases.
FAQ
What is the Zener voltage tolerance of 1PMT5935C/TR7?
The "C" suffix in 1PMT5935C/TR7 denotes ±1% Zener voltage tolerance at IZT = 13.9 mA and TC = 30°C. This is tighter than the standard ±5% (suffix B) and supports high-accuracy feedback in regulated power supplies where output stability is critical. The 1PMT5935C/TR7 achieves this via laser-trimmed wafer-level process control.
How is thermal management handled in the 1PMT5935C/TR7 package?
The 1PMT5935C/TR7 uses the Powermite® package with a full metallic bottom and integral locking tab that serves as both mechanical anchor and primary heat sink. Its 30°C/W junction-to-TAB 1 thermal resistance enables efficient conduction to PCB copper, allowing the 1PMT5935C/TR7 to sustain 3.0 W dissipation without external heatsinks when mounted on ≥1 sq-in. 2-oz copper.
Is the 1PMT5935C/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5935C/TR7 is qualified for lead-free reflow per J-STD-020, with peak temperature rating up to 260°C. Its molded epoxy body and metallic terminations withstand standard SAC305 profiles. The full metallic bottom also improves thermal uniformity during reflow, reducing warpage risk - a key advantage of the 1PMT5935C/TR7 over plastic-bodied alternatives.
What does the "TR7" suffix indicate in 1PMT5935C/TR7?
The "TR7" suffix indicates tape-and-reel packaging per EIA-481 standard on a 7-inch reel containing 3,000 units. This format is optimized for high-speed pick-and-place machines and ensures consistent orientation (cathode TAB 1 leading) during automated assembly - a verified handling feature of the 1PMT5935C/TR7 confirmed in Microsemi's packaging specification MSC0995.
Can the 1PMT5935C/TR7 be used as a replacement for through-hole Zeners like 1N5254B?
No - the 1PMT5935C/TR7 is not a drop-in replacement for 1N5254B due to different package (Powermite® vs. DO-35), thermal path (TAB 1 conduction vs. lead-frame convection), and mounting requirements. While both regulate at ~27 V, the 1PMT5935C/TR7 requires dedicated thermal pad layout and reflow profile validation. Direct substitution without board redesign is not supported for the 1PMT5935C/TR7.
1PMT5935C/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):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 20.6 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
1PMT5935C/TR7 FAQ
1.How can I place an order for 1PMT5935C/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5935C/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 1PMT5935C/TR7 reliable?
The price and inventory of 1PMT5935C/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5935C/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5935C/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5935C/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5935C/TR7?
1PMT5935C/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5935C/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 1PMT5935C/TR7?
For technical support, including 1PMT5935C/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5935C/TR7 requirements.
6.How does Aetrix verify that 1PMT5935C/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5935C/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 1PMT5935C/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5935C/TR7?
All 1PMT5935C/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5935C/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 1PMT5935C/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5935C/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5935C/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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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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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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