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Microchip Technology 1PMT5937E3/TR13
- Part No.:
- 1PMT5937E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937E3/TR13.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,241
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Product details
Overview
1PMT5937E3/TR13 from Microsemi is a 33 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 11.4 mA test current (IZT), 33 Ω dynamic impedance (ZZT), and thermal resistance of 30°C/W junction-to-TAB1 - used for precision voltage regulation and overvoltage protection in compact DC power rails.
For engineers reviewing the 1PMT5937E3/TR13 datasheet, 1PMT5937E3/TR13 pinout, 1PMT5937E3/TR13 application, or 1PMT5937E3/TR13 equivalent, key selection criteria include Zener voltage tolerance, power derating above 60°C, reverse leakage at VR = 25.1 V (≤1 µA), knee current (IZK = 0.25 mA), and compatibility with EIA-481 tape-and-reel automated placement.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its Powermite® package integrates a full metallic bottom and locking tab that serve as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer without flux entrapment.
The device exhibits low reverse leakage (≤1 µA at VR = 25.1 V), tight dynamic impedance (33 Ω at IZT = 11.4 mA), and ESD robustness (>16 kV HBM), making it suitable for industrial control inputs and sensor signal conditioning where transient immunity and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZT = 11.4 mA, TL = 30°C - defines nominal regulation point with predictable deviation across production lot |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power before thermal shutdown or degradation |
| Dynamic Impedance | 33 Ω at IZT - determines output voltage variation under load current changes (e.g., ΔVZ ≈ 33 mV per 1 mA ΔIZ) |
| Knee Current | 0.25 mA - minimum current needed to enter stable Zener conduction region; below this, regulation degrades rapidly |
| Reverse Leakage | ≤1 µA at VR = 25.1 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies temperature rise per watt; requires adequate PCB copper area on TAB 1 pad for thermal management |
| ESD Rating | >16 kV per Human Body Model - supports handling and assembly in non-ESD-controlled environments without damage |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to ≥100 mm² copper pour for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode connection; polarity confirmed by cathode marking on package body adjacent to TAB 1 |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, preventing post-assembly corrosion and voiding risks |
| Integral locking tab | Acts as mechanical anchor and thermal interface to PCB, improving placement yield and thermal performance |
| Surface-mount compatibility | Designed for EIA-481 tape-and-reel (13-inch reel, 12,000 pcs) and automatic insertion equipment |
| Wide Zener voltage range | 33 V nominal with ±5% tolerance - enables use in 24–36 V system rail monitoring and clamp circuits |
Applications
| Industrial Sensor Signal Conditioning | DC Power Rail Overvoltage Clamp |
|---|---|
Use Scenario: Protecting analog front-end inputs of 4–20 mA transmitters against transient surges on 24 V supply lines. IC Role / Device Role / Timing Role: Zener clamping element placed between signal line and ground, conducting only above 33 V threshold. Use Value: Limits input voltage to ≤33 V while drawing <1 µA at normal operating voltage (24 V), preserving signal integrity and ADC accuracy. | Use Scenario: Safeguarding microcontroller I/O pins and LDO regulators in programmable logic controllers exposed to inductive kickback. IC Role / Device Role / Timing Role: Shunt regulator connected across 3.3 V or 5 V rail and ground, absorbing surge energy via controlled breakdown. Use Value: Clamps transients up to 33 V with 33 Ω dynamic impedance, limiting peak voltage overshoot to <34 V for <100 ns events. |
| Automated Test Equipment Reference | Telecom Line Interface Protection |
Use Scenario: Providing stable 33 V reference for DAC output buffers in benchtop multimeters and calibration sources. IC Role / Device Role / Timing Role: Precision voltage reference source operating at IZT = 11.4 mA with minimal temperature drift. Use Value: Delivers ±5% initial accuracy and <33 Ω AC impedance, supporting 12-bit measurement resolution without external trimming. | Use Scenario: Protecting RS-485 transceiver inputs in outdoor base stations subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on data line, coordinated with TVS diodes for multi-stage protection. Use Value: Activates at 33 V with >16 kV HBM rating, reducing stress on downstream ICs during fast-rising transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 33 V nominal, but DO-204AL (DO-41) through-hole package; 5 W rating; higher ZZT (40 Ω) | Requires manual or wave soldering; unsuitable for high-density SMT layouts | Select when board space allows through-hole mounting and higher power margin is needed |
| BZX84-C33 | SOT-23 package; 33 V ±5%; lower power (300 mW); higher ZZT (90 Ω); no metallic thermal tab | Limited to low-current bias/reference use; cannot handle >100 mA surge currents | Select for cost-sensitive, low-power bias networks where thermal performance is secondary |
Compared with 1N5355B and BZX84-C33, the 1PMT5937E3/TR13 delivers superior thermal management via its Powermite® metallic tab, supports full 3.0 W dissipation in SMT form, and offers lower dynamic impedance - making it optimal for industrial power rail clamping where reliability under thermal stress is critical.
Availability
1PMT5937E3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power rail clamping, automated test equipment references, and telecom line protection requiring stable component supply and traceable sourcing.
Supply support for 1PMT5937E3/TR13 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 for high-power density voltage regulation in space-constrained, thermally demanding applications - emphasizing robust packaging, repeatable breakdown characteristics, and assembly compatibility.
FAQ
What is the Zener voltage tolerance for 1PMT5937E3/TR13?
The 1PMT5937E3/TR13 has a standard Zener voltage tolerance of ±5% at IZT = 11.4 mA and TL = 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the E3 suffix indicates the standard ±5% grade. This tolerance directly impacts regulation accuracy in precision reference applications.
How much power can 1PMT5937E3/TR13 dissipate continuously?
The 1PMT5937E3/TR13 is rated for 3.0 W DC power dissipation when TAB 1 temperature is maintained at 60°C. Derating is required above this temperature - approximately linear at 30°C/W - meaning power must be reduced to ~2.1 W at TAB 1 = 80°C. Full 3.0 W operation requires adequate PCB copper area under TAB 1.
Is 1PMT5937E3/TR13 compatible with automated SMT assembly?
Yes, the 1PMT5937E3/TR13 is supplied in EIA-481 compliant tape-and-reel format (13-inch reel, 12,000 pieces) and features a Powermite® package optimized for pick-and-place machines. Its locking tab and flat metallic bottom ensure stable orientation and reliable placement without tombstoning or misalignment.
What is the reverse leakage current specification for 1PMT5937E3/TR13?
The reverse leakage current for 1PMT5937E3/TR13 is specified as ≤1 µA at VR = 25.1 V and TL = 30°C. This low leakage ensures minimal loading on high-impedance bias networks and preserves accuracy in precision reference circuits where even nanoamp-level currents affect performance.
Does 1PMT5937E3/TR13 have ESD protection built-in?
Yes, the 1PMT5937E3/TR13 has an ESD rating of >16 kV per Human Body Model (HBM), verified per ANSI/ESDA/JEDEC JS-001. This level of robustness allows safe handling and assembly in standard manufacturing environments without requiring additional ESD safeguards during board assembly.
1PMT5937E3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 25.1 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
1PMT5937E3/TR13 FAQ
1.How can I place an order for 1PMT5937E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937E3/TR13 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 1PMT5937E3/TR13 reliable?
The price and inventory of 1PMT5937E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5937E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937E3/TR13?
1PMT5937E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937E3/TR13 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 1PMT5937E3/TR13?
For technical support, including 1PMT5937E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937E3/TR13 requirements.
6.How does Aetrix verify that 1PMT5937E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937E3/TR13 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 1PMT5937E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5937E3/TR13?
All 1PMT5937E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937E3/TR13, 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 1PMT5937E3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5937E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937E3/TR13 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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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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