My Inquiry
My Account
Microchip Technology 1PMT5937CE3/TR7
- Part No.:
- 1PMT5937CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937CE3/TR7.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,062
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1PMT5937CE3/TR7 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 <1 µA reverse leakage at 25.1 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5937CE3/TR7 datasheet, 1PMT5937CE3/TR7 pinout, 1PMT5937CE3/TR7 application, or 1PMT5937CE3/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, and compatibility with automated SMT assembly using 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 integrates a full metallic bottom and locking tab to enhance thermal conduction and eliminate solder flux entrapment during reflow.
The device exhibits low reverse leakage (<1 µA at VR = 25.1 V), a knee impedance of 0.25 Ω, and a thermal resistance of 30°C/W from junction to TAB 1 - enabling stable regulation under transient load conditions in compact power-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZT = 11.4 mA - defines nominal regulation point with production-grade tolerance. |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling with defined thermal boundary condition. |
| Dynamic Impedance (ZZT) | 33 Ω at IZT - determines small-signal voltage variation under AC/ripple loading near regulation point. |
| Knee Impedance (ZZK) | 0.25 Ω - indicates sharpness of breakdown onset, critical for low-current regulation stability. |
| Reverse Leakage (IR) | <1 µA at VR = 25.1 V - ensures minimal standby current in clamping or reference applications. |
| ESD Rating | >16 kV per Human Body Model - supports robust handling in automated manufacturing without additional protection. |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - enables direct thermal path to PCB copper or heatsink via metal tab. |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1.
| 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; mounted opposite TAB 1, compatible with standard DO-216 footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling previously limited to larger through-hole packages. |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning requirements. |
| Integral heat sink locking tab | Provides mechanical anchoring and low-thermal-resistance path (30°C/W) from junction to PCB copper or external heatsink. |
| ESD robustness | >16 kV HBM rating allows direct integration into unshielded front-end circuits without added TVS protection. |
| Automated insertion compatibility | EIA-481 tape-and-reel packaging (7″ reel, 3,000 pcs) supports high-speed pick-and-place with zero orientation ambiguity. |
Applications
| DC Power Rail Clamping | Feedback Reference in SMPS |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V logic rails against transient overvoltage events from ESD or inductive switching. IC Role / Device Role: Shunt clamping element that conducts above 33 V to limit voltage excursion and divert surge current to ground. Use Value: Leverages 3.0 W power rating and 30°C/W thermal resistance to absorb multi-millisecond transients without failure. | Use Scenario: Providing stable voltage reference for optocoupler-based feedback in isolated flyback converters. IC Role / Device Role: Precision Zener reference setting secondary-side regulation threshold in closed-loop control. Use Value: ±5% VZ tolerance and low ZZT ensure tight output voltage regulation (<±2%) across line/load/temperature. |
| Industrial Sensor Signal Conditioning | Programmable Voltage Threshold Detection |
Use Scenario: Biasing and protecting analog front-end inputs of 4–20 mA transmitter circuits exposed to field wiring surges. IC Role / Device Role: Input-stage overvoltage clamp and bias reference for op-amp level-shifting networks. Use Value: Metallic tab enables direct thermal coupling to sensor PCB ground plane, sustaining repeated 1 kV/µs transients. | Use Scenario: Setting trip point for comparator-based undervoltage lockout (UVLO) or brownout detection in battery-powered systems. IC Role / Device Role: Stable reference source for comparator input, ensuring consistent activation threshold independent of supply ripple. Use Value: Low knee impedance (0.25 Ω) and sub-µA IR minimize threshold drift under varying load and temperature conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B | Same 33 V nominal, but TO-204AA (DO-41) through-hole package; 5 W rating; higher thermal resistance (~50°C/W). | Requires PCB through-holes and manual or wave soldering; unsuitable for high-density SMT layouts. | Select when higher power margin or legacy through-hole compatibility is required over space-constrained SMT design. |
| BZX84-C33 | SOT-23 package; 33 V ±5%; 300 mW rating; no metal tab; thermal resistance ~300°C/W. | Limited to low-power signal-level clamping; cannot sustain 3.0 W pulses or continuous regulation. | Select only for low-current bias/reference use where board space is extreme and power stress is negligible. |
Compared with 1N5353B and BZX84-C33, the 1PMT5937CE3/TR7 uniquely combines SMT compatibility, 3.0 W power handling, and 30°C/W thermal resistance - making it the only option among the three suitable for high-reliability, thermally demanding, surface-mount voltage regulation.
Availability
1PMT5937CE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom infrastructure equipment requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5937CE3/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 density voltage regulation in space-constrained, thermally aggressive environments - particularly where automated assembly and long-term field reliability are mandatory.
FAQ
What is the Zener voltage tolerance for 1PMT5937CE3/TR7?
The 1PMT5937CE3/TR7 has a standard Zener voltage tolerance of ±5% at 33 V, measured at IZT = 11.4 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the CE3/TR7 variant specifies ±5%. This tolerance directly impacts regulation accuracy in feedback and reference applications.
How is thermal management handled in the 1PMT5937CE3/TR7 package?
The 1PMT5937CE3/TR7 uses a Powermite® package with a full metallic bottom and integral locking tab (TAB 1) acting as both cathode and primary thermal path. Its junction-to-TAB thermal resistance is 30°C/W, meaning effective heat transfer requires soldering TAB 1 to a sufficiently sized copper pour or heatsink. Without this, power derating is necessary per the thermal curve in MSC0995.
Is the 1PMT5937CE3/TR7 suitable for automated SMT assembly?
Yes, the 1PMT5937CE3/TR7 is fully compatible with automated SMT assembly. It ships in EIA-481-compliant tape-and-reel format (7″ reel, 3,000 pieces), features a standardized DO-216AA footprint, and its locking tab prevents rotation during placement. The full metallic bottom also eliminates flux entrapment risks during reflow, supporting high-yield, no-clean processes.
What is the maximum reverse leakage current for 1PMT5937CE3/TR7?
The maximum reverse leakage current (IR) for 1PMT5937CE3/TR7 is <1 µA at VR = 25.1 V, measured at TL = 30°C. This low leakage ensures minimal quiescent current draw in battery-backed or energy-sensitive applications, and supports stable reference performance in high-impedance feedback networks where leakage could cause offset errors.
Does the 1PMT5937CE3/TR7 have ESD protection built-in?
Yes, the 1PMT5937CE3/TR7 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as confirmed in the MSC0995 datasheet. This intrinsic robustness allows direct integration into unshielded I/O or power entry circuits without requiring external TVS devices - reducing BOM count and board area in surge-prone industrial and automotive interfaces.
1PMT5937CE3/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):
- 33 V
- Tolerance:
- ±2%
- 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
1PMT5937CE3/TR7 FAQ
1.How can I place an order for 1PMT5937CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937CE3/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 1PMT5937CE3/TR7 reliable?
The price and inventory of 1PMT5937CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5937CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937CE3/TR7?
1PMT5937CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937CE3/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 1PMT5937CE3/TR7?
For technical support, including 1PMT5937CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5937CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937CE3/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 1PMT5937CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5937CE3/TR7?
All 1PMT5937CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937CE3/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 1PMT5937CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5937CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937CE3/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…
