My Inquiry
My Account
Microchip Technology 1PMT5935B/TR7
- Part No.:
- 1PMT5935B/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5935B/TR7.pdf
- Description:
- DIODE ZENER 27V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,240
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5935B/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 1PMT5935B/TR7 datasheet, 1PMT5935B/TR7 pinout, 1PMT5935B/TR7 application, or 1PMT5935B/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 EIA-481 tape-and-reel automated assembly.
Technical Context
This device operates as a two-terminal voltage-regulating diode with cathode designated by TAB 1. Its Powermite® package integrates a full metallic bottom and locking tab for mechanical stability and thermal conduction to the PCB pad.
Electrical behavior is defined at TL = 30°C with zener voltage measured 20 seconds after DC current application; dynamic impedance derived using 60 Hz RMS AC current equal to 10% of IZT per Micro Note 202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% - stable regulation point under 13.9 mA test current at 30°C case temperature |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - defines maximum continuous DC power handling with PCB thermal path |
| Dynamic Impedance (ZZT) | 23 Ω at IZT = 13.9 mA - low AC impedance ensures minimal voltage deviation under load transients |
| Knee Impedance (ZZK) | 700 Ω at IZK = 0.25 mA - characterizes soft turn-on behavior near breakdown threshold |
| Reverse Leakage (IR) | ≤1 µA at VR = 20.6 V - guarantees low standby current in clamping or reference circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - enables thermal design using TAB 1 as primary heat transfer node to PCB |
| ESD Rating | >16 kV HBM - supports robust handling in automated SMT lines without additional protection |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab; cathode identified by TAB 1; mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; used for circuit return path |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat sink locking tab | Mechanically anchors device during reflow and conducts heat directly from junction to PCB via TAB 1 |
| Full metallic bottom | Eliminates solder flux entrapment risk and improves thermal interface reliability vs. plastic-bottom SMD packages |
| ESD robustness | >16 kV Human Body Model rating reduces need for external ESD protection in board-level design |
| Automated insertion compatibility | DO-216 outline and EIA-481 tape-and-reel packaging support high-speed pick-and-place placement |
Applications
| Industrial Power Supply Monitoring | Automotive ECUs |
|---|---|
Use Scenario: Monitoring 24 V nominal battery rail for overvoltage detection prior to DC-DC conversion. IC Role / Device Role / Timing Role: Zener clamping element referenced to ground, protecting downstream regulators from >27 V transients. Use Value: Tight 27 V ±5% tolerance and 1 µA leakage at 20.6 V ensure accurate trip point with negligible quiescent drain. | Use Scenario: Providing stable 27 V reference for analog sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and op-amp feedback networks. Use Value: Low 23 Ω dynamic impedance maintains reference stability under varying load currents up to 13.9 mA. |
| Programmable Logic Controllers | Telecom Line Cards |
Use Scenario: Overvoltage protection on 24 V I/O backplane connectors exposed to field wiring faults. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping fault energy into ground plane via TAB 1 thermal path. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway. | Use Scenario: Bias voltage generation for RF front-end amplifiers requiring stable supply in compact line card layouts. IC Role / Device Role / Timing Role: Compact, low-profile voltage reference replacing through-hole 1N52xx series in space-constrained designs. Use Value: Powermite® package occupies <50% footprint of DO-41 while delivering identical 3.0 W capability and superior thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5254B | Same 27 V nominal zener voltage but in DO-35 glass package; 0.5 W rating; no metallic thermal tab | Limited to low-power reference use; unsuitable for 3 W clamping or high-current regulation | Select only when thermal budget permits and PCB layout cannot accommodate Powermite® footprint |
| BZX84-C27 | SOT-23 package; 27 V ±5%; 300 mW rating; 80 Ω ZZT; no integrated heat sink tab | Designed for low-current biasing, not power clamping; requires external heatsinking above 100 mA | Choose for ultra-compact footprints where 3.0 W operation is unnecessary and thermal mass is externally managed |
Compared with 1N5254B and BZX84-C27, the 1PMT5935B/TR7 delivers 6× higher power handling and direct PCB thermal coupling via TAB 1-enabling reliable 27 V regulation in industrial-grade 24 V systems without derating or auxiliary cooling.
Availability
1PMT5935B/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, and programmable logic controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1PMT5935B/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 to replace through-hole devices in automated SMT production while maintaining high power density and thermal performance in harsh-environment applications.
FAQ
What is the zener voltage tolerance for 1PMT5935B/TR7?
The 1PMT5935B/TR7 has a standard zener voltage tolerance of ±5% at 27 V, measured at 13.9 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the TR7 variant uses the standard ±5% grade.
How is thermal management handled in the 1PMT5935B/TR7 package?
The 1PMT5935B/TR7 uses its metallic TAB 1 as the primary thermal conduction path, with a specified junction-to-TAB thermal resistance of 30°C/W. Effective thermal management requires soldering TAB 1 to a minimum 100 mm² copper pour on the PCB to sustain 3.0 W dissipation at 60°C case temperature.
Is the 1PMT5935B/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5935B/TR7 is qualified for standard lead-free reflow profiles including JEDEC J-STD-020. Its molded Powermite® package and metallic terminals withstand peak temperatures up to 260°C for 30 seconds, and the full metallic bottom prevents flux entrapment during soldering.
What does the "TR7" suffix indicate in 1PMT5935B/TR7?
The "TR7" suffix denotes tape-and-reel packaging per EIA-481 standard, supplied on a 7-inch reel containing 3,000 units. This format ensures compatibility with high-speed automated pick-and-place equipment and supports consistent SMT line feeding.
Can the 1PMT5935B/TR7 be used as a replacement for older through-hole Zeners like 1N5254B?
The 1PMT5935B/TR7 provides identical 27 V regulation but in a surface-mount Powermite® package with 3.0 W rating and integrated thermal tab-making it a functional upgrade, not a drop-in replacement. PCB layout must accommodate the DO-216 outline and TAB 1 thermal pad, unlike the axial DO-35 footprint of 1N5254B.
1PMT5935B/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:
- ±5%
- 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
1PMT5935B/TR7 FAQ
1.How can I place an order for 1PMT5935B/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5935B/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 1PMT5935B/TR7 reliable?
The price and inventory of 1PMT5935B/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5935B/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5935B/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5935B/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5935B/TR7?
1PMT5935B/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5935B/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 1PMT5935B/TR7?
For technical support, including 1PMT5935B/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5935B/TR7 requirements.
6.How does Aetrix verify that 1PMT5935B/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5935B/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 1PMT5935B/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5935B/TR7?
All 1PMT5935B/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5935B/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 1PMT5935B/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5935B/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5935B/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
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
