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Microchip Technology 1PMT5937BE3/TR13
- Part No.:
- 1PMT5937BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937BE3/TR13.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,406
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Product details
Overview
1PMT5937BE3/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, 33 Ω dynamic impedance, and 1 µA max reverse leakage at 25.1 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5937BE3/TR13 datasheet, 1PMT5937BE3/TR13 pinout, 1PMT5937BE3/TR13 application, or 1PMT5937BE3/TR13 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.
Technical Context
This device operates as a two-terminal voltage-regulating diode with a defined breakdown threshold at 33 V under 11.4 mA test current. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow.
The 1PMT5937BE3/TR13 exhibits 33 Ω dynamic impedance at IZT, 800 Ω knee impedance at 0.25 mA, and maintains ≤1 µA reverse leakage up to 25.1 V - enabling stable clamping in low-power protection and reference applications across -55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 33 V ±5% at 11.4 mA - defines precise clamping threshold for voltage-sensitive circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without derating in compact layouts |
| Dynamic Impedance | 33 Ω at 11.4 mA - ensures minimal voltage deviation under load current variation |
| Knee Impedance | 800 Ω at 0.25 mA - supports stable low-current regulation near breakdown onset |
| Reverse Leakage | ≤1 µA at 25.1 V - guarantees low standby power loss in always-on protection paths |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct thermal coupling to PCB copper for passive cooling |
| ESD Rating | >16 kV per HBM - provides robust handling margin during board assembly and field operation |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode terminal; reverse-biased configuration places TAB 1 at higher potential during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint comparable to smaller diodes |
| Full metallic bottom | Eliminates solder flux entrapment risk and improves thermal transfer to PCB ground plane |
| Integral heat sink locking tab | Provides mechanical anchoring and additional thermal mass to sustain pulsed power dissipation |
| ESD robustness >16 kV HBM | Reduces need for external ESD protection in input-stage clamping designs |
| Low knee current (0.25 mA) | Ensures reliable turn-on and regulation even in ultra-low-power bias networks |
Applications
| Power Supply Overvoltage Clamp | Industrial Sensor Reference |
|---|---|
Use Scenario: Protects downstream DC-DC converter inputs from transient surges exceeding 33 V in 24 V industrial power rails. IC Role / Device Role / Timing Role: Two-terminal shunt regulator clamping excess voltage to safeguard ICs and MOSFET gates. Use Value: Leverages 3.0 W rating and 30°C/W thermal resistance to absorb 100 ms transients without thermal runaway. | Use Scenario: Provides stable 33 V reference for analog front-end amplifiers in temperature- and pressure-sensing modules. IC Role / Device Role / Timing Role: Precision Zener voltage source with ±5% tolerance and low 1 µA leakage at 25.1 V. Use Value: Maintains reference accuracy across -40°C to +85°C ambient via low tempco design and tight knee characteristics. |
| Automotive Body Control Module Clamp | Programmable Logic Controller Input Protection |
Use Scenario: Clamps CAN bus power rail spikes induced by load dump or inductive switching in BCMs. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between 12 V rail and ground, triggered above 33 V. Use Value: >16 kV HBM rating withstands ESD events during vehicle assembly; metallic tab aids EMC grounding. | Use Scenario: Shields digital input optocouplers from field-wiring-induced surges in PLC backplanes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V discrete input channels before signal conditioning circuitry. Use Value: 33 Ω dynamic impedance ensures fast response and minimal overshoot during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5937BRLG | Same 33 V nominal Zener voltage, DO-41 through-hole package, 1.5 W rating, 40 Ω ZZT | Limited to lower-power PCBs without thermal pads; requires manual or wave soldering | Select when legacy through-hole layout or lower-cost assembly outweighs thermal performance needs |
| BZX84-C33LT1G | 33 V ±5%, SOT-23 package, 300 mW rating, 90 Ω ZZT, 100 nA leakage | Suitable only for signal-level clamping; insufficient for 3 W transient energy absorption | Choose for space-constrained logic-level protection where power handling is secondary |
Compared with 1PMT5937BE3/TR13, the 1N5937BRLG trades thermal capability for assembly flexibility, while the BZX84-C33LT1G sacrifices power rating for miniaturization - neither matches the 3.0 W, 30°C/W, and metallic-tab thermal architecture of the Powermite® device.
Availability
1PMT5937BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, programmable logic controller input stages, and sensor reference circuits requiring stable component supply and long-term lifecycle support.
Supply support for 1PMT5937BE3/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 family was engineered to deliver high-power surface-mount voltage regulation with superior thermal performance and automated assembly compatibility - targeting applications where DO-41 and SMA packages lack sufficient power density.
FAQ
What is the Zener voltage tolerance for 1PMT5937BE3/TR13?
The 1PMT5937BE3/TR13 has a standard Zener voltage tolerance of ±5% at 33 V, measured at 11.4 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, but the E3/TR13 variant specifies ±5%. This tolerance directly impacts voltage regulation accuracy in reference and clamp applications.
How is thermal management achieved in the 1PMT5937BE3/TR13 package?
The 1PMT5937BE3/TR13 uses a Powermite® package with a full metallic bottom and integral locking tab that functions as both mechanical anchor and primary heat sink. Its specified thermal resistance is 30°C/W junction-to-TAB, meaning effective thermal performance requires soldering TAB 1 to a dedicated PCB thermal pad with adequate copper area to dissipate up to 3.0 W.
Can 1PMT5937BE3/TR13 be used in place of through-hole Zeners like 1N5937B?
While the 1PMT5937BE3/TR13 shares the same 33 V nominal Zener voltage as the 1N5937B, it is not a drop-in replacement due to its surface-mount Powermite® package, 3.0 W rating, and thermal interface requirements. Substitution requires PCB redesign to accommodate the TAB-based thermal pad and SMT assembly process - not just footprint matching.
What is the maximum reverse leakage current for 1PMT5937BE3/TR13?
The maximum reverse leakage current for 1PMT5937BE3/TR13 is 1 µA at a reverse voltage of 25.1 V, measured at TL = 30°C. This low leakage supports energy-efficient operation in always-on protection circuits and preserves accuracy in high-impedance reference networks where parasitic current paths must be minimized.
Is 1PMT5937BE3/TR13 compatible with standard SMT reflow profiles?
Yes, the 1PMT5937BE3/TR13 is qualified for standard lead-free reflow processes per J-STD-020. Its molded Powermite® package and metallic bottom are designed for compatibility with automated insertion equipment and typical Pb-free peak temperatures up to 260°C, provided thermal pad design follows Microsemi's recommended land pattern for optimal solder joint integrity and thermal transfer.
1PMT5937BE3/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:
- ±5%
- 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
1PMT5937BE3/TR13 FAQ
1.How can I place an order for 1PMT5937BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937BE3/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 1PMT5937BE3/TR13 reliable?
The price and inventory of 1PMT5937BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937BE3/TR13 is usually 5 days.
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1PMT5937BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937BE3/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 1PMT5937BE3/TR13?
For technical support, including 1PMT5937BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937BE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5937BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937BE3/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 1PMT5937BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5937BE3/TR13?
All 1PMT5937BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937BE3/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 1PMT5937BE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5937BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937BE3/TR13 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
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