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Microchip Technology 1PMT5942BE3/TR13
- Part No.:
- 1PMT5942BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5942BE3/TR13.pdf
- Description:
- DIODE ZENER 51V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,340
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Product details
Overview
1PMT5942BE3/TR13 from Microsemi is a 51 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 70 Ω dynamic impedance at 7.3 mA test current and 1100 µA max reverse leakage at 38.8 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5942BE3/TR13 datasheet, 1PMT5942BE3/TR13 pinout, 1PMT5942BE3/TR13 application, or 1PMT5942BE3/TR13 equivalent, key selection criteria include its 51 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with automated SMT placement equipment.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its Powermite® package integrates a full metallic bottom and locking tab that serve as both mechanical anchor and thermal path to PCB copper, enabling 30°C/W junction-to-tab thermal resistance.
The device exhibits low knee impedance (≤400 Ω) and tight voltage tolerance (±5%), with specified Zener current range of 7.3 mA (IZT) to 38.8 mA (IZM), and reverse leakage limited to 1100 µA at 38.8 V - ensuring predictable clamping behavior in protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 51 V ±5% at IZT = 7.3 mA - defines precise clamping threshold for 48–54 V systems |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables robust transient energy absorption without heatsink |
| Dynamic Impedance | 70 Ω at IZT - ensures minimal voltage shift under load current variation |
| Reverse Leakage | 1100 µA max at VR = 38.8 V - guarantees low standby power loss in always-on circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows direct thermal coupling to PCB copper pour for passive cooling |
| ESD Rating | >16 kV HBM - provides inherent robustness against handling and system-level ESD events |
| Junction Temp | −55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
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-sinking terminal and electrical cathode connection; must be soldered to copper pour for thermal performance |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB pad with standard reflow profile |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| Integral heat-sink locking tab | Provides mechanical retention and direct thermal conduction path from junction to PCB copper |
| Automated insertion compatibility | Designed for pick-and-place and reflow assembly per EIA-481 tape-and-reel standards (7″/13″ reels) |
| Low reverse leakage | 1100 µA max at 38.8 V ensures minimal quiescent current in battery-backed or low-power systems |
Applications
| DC Power Rail Protection | Voltage Reference for Feedback Loops |
|---|---|
Use Scenario: Clamping transient overvoltage spikes on 48 V telecom or industrial DC distribution lines. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and surge limiter in parallel with load. Use Value: Absorbs up to 3.0 W transient energy while holding voltage ≤53.6 V, preventing downstream IC damage. | Use Scenario: Providing stable 51 V reference for isolated flyback converter feedback network. IC Role / Device Role / Timing Role: Precision voltage reference element in optocoupler-coupled secondary-side regulation. Use Value: ±5% tolerance and low dynamic impedance ensure consistent output voltage regulation across line/load variations. |
| ESD-Sensitive Interface Protection | Programmable Threshold Detector |
Use Scenario: Protecting RS-485 transceiver inputs against contact ESD events in factory automation nodes. IC Role / Device Role / Timing Role: Low-leakage Zener clamp placed between data line and ground. Use Value: >16 kV HBM rating and 1100 µA leakage at 38.8 V enable reliable protection without signal distortion. | Use Scenario: Setting trip point for undervoltage lockout (UVLO) or overvoltage detection in microcontroller-based power monitors. IC Role / Device Role / Timing Role: Zener-based comparator reference node tied to op-amp input. Use Value: Stable 51 V threshold with minimal temperature drift supports accurate fault detection across −40°C to +125°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ51A | TVS diode (not Zener); 51 V standoff, 600 W peak pulse power, higher leakage (~50 µA @ 41.3 V) | Transient suppression only - not suitable for continuous regulation or reference use | Select when primary need is high-energy surge clamping, not steady-state voltage reference |
| BZX84-C51 | SOT-23 package; 51 V ±5%, 300 mW power rating, 40 Ω Zzt, 100 µA IR @ 38.8 V | Limited to low-power bias/reference roles due to 0.3 W thermal limit | Select for space-constrained, low-current applications where 3.0 W capability is unnecessary |
Compared with SMCJ51A and BZX84-C51, the 1PMT5942BE3/TR13 uniquely combines 3.0 W continuous Zener regulation, DO-216 mechanical robustness, and metallic-tab thermal management - making it optimal for medium-power voltage reference and clamping where sustained power dissipation matters.
Availability
1PMT5942BE3/TR13 is available at Aetrix Electronics and suitable for DC power rail protection, voltage reference design, and ESD-sensitive interface protection requiring stable component supply and traceable sourcing.
Supply support for 1PMT5942BE3/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 semiconductor manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener series was designed for surface-mount applications demanding high power density, thermal efficiency, and automated assembly compatibility - especially in space-constrained, thermally demanding power systems.
FAQ
What is the Zener voltage tolerance for 1PMT5942BE3/TR13?
The 1PMT5942BE3/TR13 has a nominal Zener voltage of 51 V with a standard tolerance of ±5%, measured at IZT = 7.3 mA 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%.
How is thermal management achieved in the 1PMT5942BE3/TR13 package?
The 1PMT5942BE3/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab (TAB 1) that serves as both cathode and primary thermal path. Its 30°C/W junction-to-tab thermal resistance requires direct soldering of TAB 1 to a PCB copper pour for effective heat dissipation at 3.0 W.
Can 1PMT5942BE3/TR13 be used in place of through-hole Zener diodes like 1N5231B?
No - the 1PMT5942BE3/TR13 is a surface-mount DO-216 device with different thermal, mechanical, and mounting requirements than axial-lead 1N5231B (3.0 V, 500 mW). While both are Zeners, the 1PMT5942BE3/TR13 delivers 3.0 W power handling in a compact SMT form factor and is not a drop-in replacement.
What is the maximum reverse leakage current for 1PMT5942BE3/TR13?
The 1PMT5942BE3/TR13 has a maximum reverse leakage current (IR) of 1100 µA at VR = 38.8 V, measured at TL = 30°C. This value ensures low standby power loss in always-on protection and reference circuits without compromising clamping accuracy.
Is 1PMT5942BE3/TR13 compatible with lead-free reflow processes?
Yes - the 1PMT5942BE3/TR13 is qualified for standard lead-free reflow profiles per J-STD-020. Its Powermite® package withstands peak temperatures up to 260°C, and the device is supplied in EIA-481-compliant tape-and-reel format (TR13 = 13-inch reel, 12,000 pieces) for automated SMT assembly.
1PMT5942BE3/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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 38.8 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
1PMT5942BE3/TR13 FAQ
1.How can I place an order for 1PMT5942BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5942BE3/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 1PMT5942BE3/TR13 reliable?
The price and inventory of 1PMT5942BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5942BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5942BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5942BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5942BE3/TR13?
1PMT5942BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5942BE3/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 1PMT5942BE3/TR13?
For technical support, including 1PMT5942BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5942BE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5942BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5942BE3/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 1PMT5942BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5942BE3/TR13?
All 1PMT5942BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5942BE3/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 1PMT5942BE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5942BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5942BE3/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
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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