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Microchip Technology 1PMT5935A/TR7
- Part No.:
- 1PMT5935A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5935A/TR7.pdf
- Description:
- DIODE ZENER 27V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,726
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Product details
Overview
1PMT5935A/TR7 from Microsemi is a 27 V, ±5% tolerance surface-mount Zener diode in the Powermite® 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 1 µA max reverse leakage at 20.6 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5935A/TR7 datasheet, 1PMT5935A/TR7 pinout, 1PMT5935A/TR7 application, or 1PMT5935A/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 (700 Ω at 0.25 mA), and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package features a full metallic bottom and integral heat sink tab (TAB 1), enabling efficient thermal conduction directly to the PCB copper pour.
The device exhibits low reverse leakage (≤1 µA at VR = 20.6 V) and stable dynamic impedance (23 Ω at IZT = 13.9 mA), supporting reliable clamping in transient-suppression circuits and accurate voltage referencing in analog front-ends where temperature stability (−55°C to +150°C operating range) is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% at IZT = 13.9 mA - defines nominal clamping/reference level under standard test conditions |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling with defined thermal boundary condition |
| Dynamic Impedance (ZZT) | 23 Ω at IZT = 13.9 mA - indicates small-signal AC resistance affecting regulation accuracy under varying load |
| Knee Impedance (ZZK) | 700 Ω at IZK = 0.25 mA - characterizes impedance near breakdown onset, critical for low-current regulation |
| Reverse Leakage (IR) | ≤1 µA at VR = 20.6 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal path efficiency from die to mounting tab for PCB thermal design |
| ESD Rating | >16 kV per Human Body Model - supports robustness in handling and board-level ESD environments |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat sink locking tab (TAB 1). Cathode is designated by TAB 1; mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat sink interface and electrical cathode connection; must be soldered to thermal pad for rated power dissipation |
| Lead 2 | Anode | Standard anode terminal; reverse-biased during Zener operation; connects to lower-potential node in clamp/reference circuit |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3 W power handling comparable to larger through-hole Zeners |
| Integral heat sink locking tab | TAB 1 provides direct thermal conduction path to PCB, reducing junction temperature rise by ~30°C/W vs. standard SOD packages |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term reliability and void-free solder joint formation |
| ESD robustness | >16 kV HBM rating allows safe handling without special ESD controls in standard production environments |
Applications
| Industrial Power Supply Monitoring | Automotive Body Control Module Clamping |
|---|---|
Use Scenario: Monitoring 24 V DC bus voltage in programmable logic controller (PLC) backplanes to detect overvoltage faults. IC Role / Device Role / Timing Role: Zener reference element in comparator-based overvoltage detection circuit. Use Value: 27 V clamping threshold aligns with 24 V system derating margin; ±5% tolerance ensures trip point consistency across temperature. | Use Scenario: Protecting microcontroller I/O pins from load-dump transients in 12 V automotive body electronics. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between I/O line and ground. Use Value: 3.0 W rating sustains 100 ms load-dump pulses; 23 Ω dynamic impedance limits clamping overshoot during fast-rising events. |
| Medical Instrument Reference Stability | Telecom DC-DC Converter Feedback |
Use Scenario: Providing stable 27 V reference for analog-to-digital converter (ADC) biasing in portable ultrasound signal chains. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference buffer stage. Use Value: Low 1 µA reverse leakage minimizes error current into high-impedance reference nodes; −55°C to +150°C range supports sterilization cycles. | Use Scenario: Setting output voltage in isolated flyback DC-DC converters for base station power management units. IC Role / Device Role / Timing Role: Secondary-side voltage sense element in optocoupler feedback loop. Use Value: Tight 27 V regulation enables ±1% output accuracy; 700 Ω knee impedance ensures stable turn-on at light loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5935B | Same 27 V nominal voltage, but in DO-41 through-hole package; no metallic tab; 1.5 W rating | Requires manual or wave soldering; unsuitable for high-power SMT designs needing 3 W dissipation | Select 1PMT5935A/TR7 when automated assembly, thermal performance, or space-constrained layouts are required |
| BZX84-C27 | 27 V SOT-23 Zener; 300 mW rating; 80 Ω dynamic impedance; 100 nA leakage at 22 V | Lower power, smaller footprint, higher impedance - suited for signal-level biasing, not rail clamping | Choose 1PMT5935A/TR7 for 3 W clamping; BZX84-C27 only for low-current reference or protection |
Compared with 1N5935B and BZX84-C27, the 1PMT5935A/TR7 delivers 2× higher power handling than the DO-41 part and 10× higher than the SOT-23, with superior thermal resistance and ESD immunity-making it uniquely suitable for ruggedized SMT power-rail protection.
Availability
1PMT5935A/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, medical instrumentation, and telecom DC-DC converters requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5935A/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-emphasizing robust packaging, repeatable parametric performance, and automated manufacturability.
FAQ
What is the Zener voltage tolerance for 1PMT5935A/TR7?
The 1PMT5935A/TR7 has a standard Zener voltage tolerance of ±5% at 27 V, measured at 13.9 mA test current with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, but the /TR7 variant uses the standard ±5% grade. This tolerance ensures predictable clamping behavior across production lots and temperature ranges.
How is thermal management handled in the 1PMT5935A/TR7 package?
The 1PMT5935A/TR7 uses the Powermite® package with TAB 1 as both cathode and primary thermal interface. Its 30°C/W junction-to-TAB thermal resistance requires direct soldering of TAB 1 to a copper thermal pad on the PCB. This design eliminates reliance on lead-frame conduction and enables full 3.0 W dissipation when TAB 1 is maintained at ≤60°C.
Is the 1PMT5935A/TR7 compatible with standard SMT reflow profiles?
Yes, the 1PMT5935A/TR7 is qualified for standard lead-free reflow processes per J-STD-020. Its molded Powermite® package withstands peak temperatures up to 260°C, and the full metallic bottom prevents flux entrapment-reducing voiding risk and ensuring reliable solder joint formation without special process adjustments.
What does the "/TR7" suffix indicate in 1PMT5935A/TR7?
The "/TR7" suffix denotes tape-and-reel packaging per EIA-481 standard, with 3,000 pieces per 7-inch reel. This format supports automated pick-and-place assembly. The "A" in 1PMT5935A indicates the standard ±5% voltage tolerance grade; "B" variants (e.g., 1PMT5935B) share identical electrical specs but differ only in marking or minor process revisions.
Can 1PMT5935A/TR7 be used as a replacement for 1N5935B in existing designs?
No direct drop-in replacement: 1PMT5935A/TR7 is surface-mount (DO-216AA), while 1N5935B is through-hole (DO-41). Though both are 27 V Zeners, the 1PMT5935A/TR7 offers 3.0 W dissipation vs. 1.5 W for the 1N5935B and requires PCB thermal pad design. Layout redesign and thermal validation are necessary before substitution.
1PMT5935A/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:
- ±10%
- 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
1PMT5935A/TR7 FAQ
1.How can I place an order for 1PMT5935A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5935A/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 1PMT5935A/TR7 reliable?
The price and inventory of 1PMT5935A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5935A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5935A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5935A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5935A/TR7?
1PMT5935A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5935A/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 1PMT5935A/TR7?
For technical support, including 1PMT5935A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5935A/TR7 requirements.
6.How does Aetrix verify that 1PMT5935A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5935A/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 1PMT5935A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5935A/TR7?
All 1PMT5935A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5935A/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 1PMT5935A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5935A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5935A/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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