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onsemi 1PMT5941BT1G
- Part No.:
- 1PMT5941BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5941BT1G.pdf
- Description:
- DIODE ZENER 47V 3.2W POWERMITE
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
1PMT5941BT1G from onsemi is a 3.2 W surface-mount Zener diode in the POWERMITE (DO-216AA) package, with a nominal Zener voltage of 47 V, 8.0 mA test current, 35.8 V minimum Zener voltage at IZT, and 1000 Ω maximum dynamic impedance at IZT - used for precision voltage regulation in portable power rails and ESD-protected signal conditioning circuits.
For engineers reviewing the 1PMT5941BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 47 V regulation tolerance (±5%), low-profile 1.1 mm height, 1.90 × 1.96 mm footprint, Class 3 HBM ESD rating (>16 kV), and cathode-tab thermal path enabling 3.2 W dissipation at 75 °C tab temperature.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its specified Zener breakdown voltage. Its electrical behavior is defined by three critical operating points: IZT = 8.0 mA (for nominal VZ), IZK = 0.25 mA (for knee-region impedance ZZK), and VR = 35.8 V (where IR ≤ 1.0 µA).
Thermal performance relies on direct heat conduction from the junction to the cathode tab (RJcathode = 23 °C/W), not ambient air - requiring PCB copper area under the metallic bottom for effective heat sinking. The DO-216AA package's full metallic bottom eliminates flux entrapment and supports reflow soldering at 260 °C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65–49.35 V @ IZT = 8.0 mA - defines tight ±5% regulation window for 47 V nominal rail stabilization |
| Power Dissipation | 3.2 W @ cathode tab = 75 °C - requires thermal pad design with ≥23 °C/W junction-to-tab path |
| Zener Impedance | 1000 Ω max @ IZT - limits AC ripple rejection capability in low-current regulation applications |
| Leakage Current | ≤1.0 µA @ VR = 35.8 V - ensures minimal standby power loss in battery-backed circuits |
| ESD Rating | Class 3 (>16 kV HBM) - provides intrinsic protection for I/O lines without external TVS stacking |
| Package | POWERMITE (DO-216AA), 1.90 × 1.96 × 1.10 mm - enables ultra-dense layout in space-constrained mobile PCBs |
Pinout & Package
The 1PMT5941BT1G uses the DO-216AA (POWERMITE) surface-mount package with a full metallic bottom and integral heat-sink tabs. Cathode is marked by a polarity band and connected to the tab for thermal and electrical conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked) | Cathode | Main current sink and thermal path - must be soldered to ≥10 mm² copper pour for rated 3.2 W operation |
| 2 | Anode | Reference node - connects to regulated output or ground return; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile thermal package | 1.1 mm max height with metallic bottom - reduces board stack-up and improves airflow clearance in stacked modules |
| High ESD robustness | Class 3 HBM (>16 kV) - eliminates need for discrete ESD protection on 47 V bias rails |
| Small footprint | 8.45 mm² area - saves >50% board space vs. SMA while maintaining same thermal resistance to ambient |
| Pb-free & RoHS compliant | "G" suffix indicates lead-free termination - meets global environmental compliance without derating |
Applications
| Battery Backup Voltage Clamp | Industrial Sensor Excitation Supply |
|---|---|
Use Scenario: Clamping backup battery voltage (e.g., Li-SOCl₂) to prevent overvoltage damage during charging transients. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess current above 47 V threshold. Use Value: Maintains system safety at 47 V ±5% with <1 µA leakage below clamp point - extending battery life and reducing thermal load. | Use Scenario: Providing stable excitation voltage to resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Precision DC reference source with low tempco drift and high ESD immunity. Use Value: Delivers 47 V nominal excitation with ≤1000 Ω dynamic impedance - minimizing measurement error from supply variation. |
| Portable Device Power Sequencing | Automotive Body Control Module Rail Protection |
Use Scenario: Enabling controlled power-up sequencing in multi-rail handheld devices using Zener-triggered enable logic. IC Role / Device Role / Timing Role: Voltage threshold detector feeding comparator input or microcontroller GPIO. Use Value: Provides sharp 47 V turn-on with 0.25 mA knee current - enabling reliable timing margin in low-power wake-up circuits. | Use Scenario: Protecting 48 V auxiliary rails in 12/48 V dual-battery automotive systems against load dump spikes. IC Role / Device Role / Timing Role: Secondary clamping element supplementing primary TVS in high-energy surge paths. Use Value: Absorbs up to 3.2 W continuously at cathode tab = 75 °C - sustaining protection during extended overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ47ET1G | Same 47 V nominal, but SOD-123 package (1.8 × 1.4 × 1.0 mm); lower 500 mW rating; RJA = 350 °C/W | Suitable only for <0.5 W dissipation; no cathode-tab thermal path; limited to low-power signal rails | Select when board space is tighter than thermal demand - but verify power derating curves for ambient conditions |
| 1N4752A | Through-hole DO-41; 47 V nominal; 1 W rating; 5.3 mm length; no ESD rating specified | Requires wave soldering; incompatible with automated SMT assembly; lacks Class 3 ESD hardening | Choose only for legacy repair or non-automated prototyping where thermal load remains <1 W |
Compared with MMSZ47ET1G and 1N4752A, the 1PMT5941BT1G uniquely combines 3.2 W power handling, 1.1 mm profile, and certified >16 kV ESD robustness - making it the sole option for high-density, high-reliability 47 V clamping in modern portable and industrial SMT designs.
Availability
1PMT5941BT1G is available at Aetrix Electronics and suitable for battery management systems, industrial sensor interfaces, portable medical monitors, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for 1PMT5941BT1G 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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1PMT5941BT1G belongs to the 1PMT5920B Series of high-power Zener diodes engineered specifically for compact, thermally demanding surface-mount voltage regulation - targeting space-constrained portable and industrial electronics.
FAQ
What is the exact Zener voltage tolerance for 1PMT5941BT1G?
The 1PMT5941BT1G has a guaranteed Zener voltage range of 44.65 V to 49.35 V at IZT = 8.0 mA and TL = 25 °C, representing a ±5% tolerance around the nominal 47 V rating. This tolerance remains valid across the full operating temperature range of −55 °C to +150 °C, with voltage drift compensated by the device's positive temperature coefficient above ~6 V.
Can 1PMT5941BT1G replace a standard 1N4752A in an existing design?
No - the 1PMT5941BT1G is not a drop-in replacement for the through-hole 1N4752A due to its surface-mount DO-216AA package, different thermal path (cathode-tab vs. leads), and higher 3.2 W rating. While both regulate at 47 V, PCB layout, soldering process, and thermal pad design must be redesigned to use the 1PMT5941BT1G effectively.
How is thermal performance achieved in the 1PMT5941BT1G's small POWERMITE package?
The 1PMT5941BT1G achieves 3.2 W dissipation via direct junction-to-cathode-tab conduction (RJcathode = 23 °C/W), enabled by its full metallic bottom and integral locking tabs. To realize this rating, the cathode pad must connect to ≥10 mm² of 2-oz copper with thermal vias - unlike ambient-limited packages such as SOD-123 that rely solely on RJA.
Does 1PMT5941BT1G meet automotive AEC-Q200 requirements?
No - the 1PMT5941BT1G is not AEC-Q200 qualified. It is rated for industrial temperature operation (−55 °C to +150 °C) and carries Class 3 HBM ESD certification, but lacks the stress testing, failure analysis, and qualification documentation required for automotive-grade components. For AEC-compliant 47 V Zeners, consult onsemi's AEC-Q200 qualified portfolio.
What does the "T1G" suffix indicate in 1PMT5941BT1G?
The "T1G" suffix in 1PMT5941BT1G denotes tape-and-reel packaging (3000 units per reel) and Pb-free (RoHS-compliant) termination. "T1" specifies the 12 mm carrier tape format with cathode-leading orientation, and "G" confirms lead-free plating - consistent with onsemi's standardized part numbering for environmentally compliant surface-mount devices.
1PMT5941BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 3.2 W
- Impedance (Max) (Zzt):
- 67 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 35.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Powermite
1PMT5941BT1G FAQ
1.How can I place an order for 1PMT5941BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5941BT1G 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 1PMT5941BT1G reliable?
The price and inventory of 1PMT5941BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5941BT1G is usually 5 days.
3.What payment methods are accepted for 1PMT5941BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5941BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5941BT1G?
1PMT5941BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5941BT1G 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 1PMT5941BT1G?
For technical support, including 1PMT5941BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5941BT1G requirements.
6.How does Aetrix verify that 1PMT5941BT1G is sourced from the original manufacturer or authorized distributors?
All 1PMT5941BT1G 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 1PMT5941BT1G meets industry standards.
7.What is the process for return or replacement of 1PMT5941BT1G?
All 1PMT5941BT1G units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5941BT1G, 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 1PMT5941BT1G part is unused and in its original packaging.
Return procedure for 1PMT5941BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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