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onsemi 1PMT5941BT1
- Part No.:
- 1PMT5941BT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5941BT1.pdf
- Description:
- DIODE ZENER 47V 3.2W POWERMITE
- Quantity:
- Payment:
- Shipping:
Inventory:3,126
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Product details
Overview
1PMT5941BT1 from onsemi is a 47 V, 3.2 W surface-mount Zener diode in the POWERMITE® (DO−216AA) package, rated for 8.0 mA test current and 1000 Ω dynamic impedance at IZT, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the 1PMT5941BT1 datasheet, pinout, applications, or equivalent options, key selection considerations include its 47 V nominal Zener voltage with ±5% tolerance, 1.1 mm max height, 8.45 mm² footprint, 16 kV HBM ESD rating, and cathode-anode terminal configuration optimized for thermal performance via metallic tab mounting.
Technical Context
This device operates as a two-terminal voltage reference regulator, maintaining stable reverse breakdown at 47 V under DC conditions with specified IZT = 8.0 mA and VR = 35.8 V for leakage testing. Its thermal design relies on direct cathode tab conduction (RJcathode = 23 °C/W) and full metallic bottom for solder joint heat transfer.
The POWERMITE package enables high power density (3.2 W) in ultra-low profile form, achieving thermal resistance comparable to SMA while occupying 50% less PCB area. It supports reflow soldering up to 260°C for 10 seconds and is Pb-free compliant (1PMT5941BT1G variant available).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65–49.35 V @ IZT = 8.0 mA - defines regulated output range for voltage clamp or reference circuits |
| Power Dissipation | 3.2 W @ cathode tab = 75°C - enables robust transient suppression without heatsink in compact layouts |
| Zener Impedance (ZZT) | 1000 Ω @ IZT - indicates moderate AC regulation stability for low-frequency feedback paths |
| Leakage Current (IR) | ≤1.0 μA @ VR = 35.8 V - ensures minimal standby power loss in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides inherent system-level ESD resilience without external protection |
| Package | POWERMITE® (DO−216AA), 1.1 mm max height - fits under tight mechanical shields and thin bezels |
| Thermal Resistance | RJcathode = 23 °C/W - allows efficient heat extraction through cathode pad to copper pour |
Pinout & Package
POWERMITE® (DO−216AA) is a 2-pin surface-mount plastic package with integral heat sink tabs and full metallic bottom for enhanced thermal conduction. Cathode is marked by polarity band and oriented toward sprocket holes in tape.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Primary heat path and voltage reference node; must be connected to thermal pad for rated 3.2 W operation |
| 2 | Anode | Return path for Zener current; low-thermal-mass connection suffices for most applications |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile thermal package | 1.1 mm max height with metallic bottom eliminates flux entrapment and improves solder joint reliability |
| High ESD immunity | 16 kV HBM rating reduces need for discrete ESD protection in front-end interfaces |
| Space-efficient footprint | 8.45 mm² area - 50% smaller than SMA, enabling dense layout in handheld devices |
| Stable Zener voltage tolerance | ±5% over temperature and life - suitable for non-critical voltage references where cost and size dominate |
| Pb-free compliance | 1PMT5941BT1G variant available - meets RoHS and JEDEC J-STD-020 reflow requirements |
Applications
| Cellular Phone Power Management | USB-C Port Overvoltage Protection |
|---|---|
Use Scenario: Regulating auxiliary supply rails and clamping surge transients on PMIC input lines in slim smartphone designs. IC Role / Device Role / Timing Role: Voltage clamp and reference element protecting buck converter inputs from 12 V adapter surges. Use Value: 1.1 mm height allows placement beneath display flex cables; 3.2 W rating absorbs 10/1000 µs 30 V transients without derating. | Use Scenario: Safeguarding USB-C controller and Type-C port logic from VBUS overvoltage events during hot-plug or adapter fault. IC Role / Device Role / Timing Role: Fast-acting shunt regulator triggered at 47 V to divert fault current before downstream IC damage. Use Value: 16 kV HBM rating matches USB-IF ESD requirements; DO−216AA footprint aligns with USB-C board space constraints. |
| Industrial Sensor Signal Conditioning | POS Terminal Keypad Interface Protection |
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure sensors operating in 24 V industrial environments. IC Role / Device Role / Timing Role: Precision Zener reference providing stable bias for op-amp instrumentation stages. Use Value: ±5% VZ tolerance and low tempco (see Fig. 6) ensure <0.5% full-scale error across −40°C to +85°C ambient. | Use Scenario: Protecting microcontroller GPIO lines connected to membrane keypad matrix from ESD and contact bounce-induced spikes. IC Role / Device Role / Timing Role: Low-leakage (<1 µA) shunt clamp limiting line voltage to 47 V during human touch events. Use Value: 8.45 mm² footprint fits between keypad traces; full metallic bottom prevents solder voids during automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A | 47 V unidirectional TVS diode, 600 W peak pulse power, higher capacitance (150 pF) | Designed for transient suppression only; lacks precision DC regulation capability | Select when surge energy >100 mJ dominates; avoid if stable DC reference needed |
| BZX84-C47 | SOT-23 package, 300 mW power, 45–49 V range, no metallic thermal tab | Limited to low-power biasing; cannot handle sustained 3.2 W dissipation | Choose for cost-sensitive, low-current reference use; not suitable for power rail clamping |
Compared with SMBJ47A and BZX84-C47, the 1PMT5941BT1 uniquely combines 3.2 W continuous Zener regulation, 1.1 mm profile, and cathode-tab thermal path-making it the only option among the three capable of both precision DC referencing and moderate-energy transient clamping in ultra-thin consumer enclosures.
Availability
1PMT5941BT1 is available at Aetrix Electronics and suitable for cellular phone power management, USB-C port overvoltage protection, and industrial sensor signal conditioning requiring stable component supply, consistent tape-and-reel packaging (12,000 units per reel), and Pb-free compliance.
Supply support for 1PMT5941BT1 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 supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The 1PMT5920B Series-including 1PMT5941BT1-is engineered specifically for space-constrained, thermally demanding portable electronics, emphasizing miniaturized power handling and high-reliability surface-mount integration.
FAQ
What is the nominal Zener voltage of the 1PMT5941BT1 and how tightly is it specified?
The 1PMT5941BT1 has a nominal Zener voltage of 47 V, with a guaranteed range of 44.65 V to 49.35 V (±5%) when tested at IZT = 8.0 mA and TL = 25°C. This tolerance remains valid across the full operating temperature range of −55°C to +150°C, as confirmed in the onsemi datasheet revision 3, page 2.
Can the 1PMT5941BT1 be used in place of a standard SMA-packaged Zener diode?
Yes, the 1PMT5941BT1 delivers equivalent thermal performance to SMA-packaged Zeners but in a 50% smaller footprint and 1.1 mm max height. Its POWERMITE® (DO−216AA) package requires revised PCB land pattern per onsemi's recommended soldering footprint (page 5), and cathode thermal pad connection is mandatory to achieve the rated 3.2 W dissipation.
What is the maximum allowable junction temperature for continuous operation of the 1PMT5941BT1?
The 1PMT5941BT1 has an operating junction temperature range of −55°C to +150°C. For continuous DC operation at full 3.2 W power, the cathode tab must be maintained at ≤75°C, as specified in the "Maximum DC Power Dissipation" note (page 2). Exceeding this tab temperature reduces safe operating power linearly per the derating curve in Figure 1.
Does the 1PMT5941BT1 meet RoHS and lead-free assembly requirements?
Yes-the "G" suffix in the ordering code (e.g., 1PMT5941BT1G) explicitly denotes the Pb-free version of the 1PMT5941BT1. It complies with RoHS Directive 2011/65/EU and supports JEDEC J-STD-020 moisture sensitivity level 1 reflow profiles, including peak temperatures up to 260°C for 10 seconds.
How does the 1PMT5941BT1 perform under ESD stress, and what test standard applies?
The 1PMT5941BT1 achieves Class 3 ESD rating (>16 kV) per the Human Body Model (HBM), as stated in the Features section (page 1). This performance is intrinsic to the device structure and requires no external circuitry-making it suitable for direct placement on I/O lines exposed to user contact in handheld products.
1PMT5941BT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
1PMT5941BT1 FAQ
1.How can I place an order for 1PMT5941BT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5941BT1 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 1PMT5941BT1 reliable?
The price and inventory of 1PMT5941BT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5941BT1 is usually 5 days.
3.What payment methods are accepted for 1PMT5941BT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5941BT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5941BT1?
1PMT5941BT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5941BT1 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 1PMT5941BT1?
For technical support, including 1PMT5941BT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5941BT1 requirements.
6.How does Aetrix verify that 1PMT5941BT1 is sourced from the original manufacturer or authorized distributors?
All 1PMT5941BT1 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 1PMT5941BT1 meets industry standards.
7.What is the process for return or replacement of 1PMT5941BT1?
All 1PMT5941BT1 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5941BT1, 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 1PMT5941BT1 part is unused and in its original packaging.
Return procedure for 1PMT5941BT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5941BT1 Tags
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