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Diodes Incorporated ZXSBMR16PT8TA
- Part No.:
- ZXSBMR16PT8TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- SOT-223-8
- Datasheet:
-
ZXSBMR16PT8TA.pdf
- Description:
- BRIDGE RECT 1PHASE 40V 400MA SM8
- Quantity:
- Payment:
- Shipping:
Inventory:4,388
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Product details
Overview
ZXSBMR16PT8TA from Diodes Incorporated is a Schottky bridge rectifier with integrated freewheel diode, designed specifically for MR16 LED driver circuits alongside ZXLD1350E5. It delivers 0.4A average forward current, 40V reverse voltage rating, and low 305–660mV forward voltage across 50–1000mA loads, operating reliably at up to 90°C internal ambient temperature in enclosed MR16 lamp housings.
For engineers reviewing the ZXSBMR16PT8TA datasheet, ZXSBMR16PT8TA pinout, ZXSBMR16PT8TA application, or ZXSBMR16PT8TA equivalent, key selection criteria include its AEC-Q101 qualification, SM-8 surface-mount package, low IR (≤10μA @30V), fast trr (3ns), and thermal derating behavior above 85°C ambient.
Technical Context
This device integrates a full-wave Schottky bridge and a dedicated freewheel diode in a single SM-8 package-optimized for capacitive-input, 12V RMS AC-driven MR16 LED drivers. Its 40V VRRM and 13.2VRMS input rating align precisely with low-voltage halogen/LED retrofit lamp standards.
The junction-to-ambient thermal resistance is 125°C/W on minimal FR4 copper, requiring careful thermal layout when operating near TJ = 125°C under reverse bias. Reverse leakage rises to 370μA at 85°C, directly impacting standby power loss in always-on LED drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; defines safe AC input peak handling (≤12V RMS + margin) |
| IF(AV) | 0.4 A - Average forward current per diode leg; sets continuous LED drive capability in MR16 applications |
| VF @ 500mA | 485–550 mV - Forward drop at typical operating current; determines conduction loss and thermal load in bridge path |
| IR @ 30V | 6–10 μA @ 25°C; ≤370 μA @ 85°C - Reverse leakage directly impacts no-load power consumption and thermal runaway risk |
| trr | 3 ns - Ultra-fast recovery enables high-frequency switching compatibility and reduces EMI in compact MR16 layouts |
| RθJA | 125 °C/W - Thermal resistance on minimal FR4; requires ≥1 cm² copper pour for sustained 0.4A operation at TA = 90°C |
| TJ (reverse) | 125 °C - Maximum junction temperature under reverse bias; mandates derating above VR = 30V per Design Note DN86 |
Pinout & Package
Package: SM-8 surface-mount package with 8 terminals (4 AC inputs, 2 DC outputs, 1 freewheel cathode, 1 freewheel anode), molded epoxy body, gull-wing leads, and 1.52 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 7, 8 | AC Input Terminals | Two pairs for full-wave bridge AC input; symmetrical layout supports bidirectional line connection |
| 3, 6 | DC Output Terminals (+ and −) | Bridge output nodes delivering rectified DC to LED string; polarity fixed per internal topology |
| 4 | Freewheel Diode Cathode | Common cathode node for integrated freewheel path; connects to LED string cathode or inductor return |
| 5 | Freewheel Diode Anode | Anode of integrated freewheel diode; ties to switch node of ZXLD1350E5 or buck converter inductor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky bridge + freewheel diode | Reduces component count by 5 parts vs discrete solution; eliminates interconnect parasitics in MR16 PCB space |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for harsh-environment lighting |
| Low VF (305 mV typ @ 50mA) | Minimizes conduction loss at light-load conditions common in dimmed MR16 lamps, improving efficiency below 10% brightness |
| Low IR (6 μA typ @ 25°C) | Enables <100 μW standby dissipation in off-state; critical for meeting EU ErP Lot 9 standby power limits |
| SM-8 footprint | Matches industry-standard 6.5 × 7.0 mm outline with 1.52 mm pitch; compatible with standard SMT reflow profiles and AOI inspection |
Applications
| MR16 LED Retrofit Lamps | 12V AC Low-Voltage Lighting Systems |
|---|---|
Use Scenario: Replacement of halogen MR16 lamps with LED-based versions in track, display, and residential lighting fixtures using existing 12V AC transformers. IC Role / Device Role / Timing Role: Primary AC/DC conversion and freewheeling path in constant-current buck topology driven by ZXLD1350E5. Use Value: Enables >85% system efficiency at 0.4A output while maintaining <90°C internal enclosure temperature per IEC 62560. | Use Scenario: Distributed low-voltage lighting in hospitality, retail, and museum environments where 12V AC distribution minimizes voltage drop over long cable runs. IC Role / Device Role / Timing Role: Bridge rectification and synchronous freewheeling element in transformer-isolated LED drivers with active current regulation. Use Value: Eliminates need for external Schottky array and freewheel diode, reducing BOM cost by $0.18 and saving 22 mm² PCB area. |
| Automotive Interior Lighting | Dimmable Architectural LED Drivers |
Use Scenario: LED map lights, courtesy lights, and reading lamps powered from vehicle 12V AC auxiliary supplies or PWM-modulated sources. IC Role / Device Role / Timing Role: Input rectifier and flyback path in buck-derived driver topologies tolerant of wide input ripple and transient surges. Use Value: AEC-Q101 qualification ensures survival under load-dump transients and -40°C to +105°C under-hood thermal cycling. | Use Scenario: Phase-cut dimmable LED drivers for wall-mounted and recessed luminaires using leading-edge TRIAC dimmers. IC Role / Device Role / Timing Role: High-fidelity rectification stage preceding EMI filter and buck controller; low trr prevents false triggering of dimmer zero-cross detection. Use Value: 3ns trr avoids misfiring in trailing-edge dimmers and maintains >95% dimming range down to 1% output current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky bridge + freewheel diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR1045CT | Discrete dual-diode TO-220 package; no integrated freewheel path; VF = 550mV @ 5A; IR = 500μA @ 45V | Requires external freewheel diode and heatsink; unsuitable for MR16 enclosure size or thermal constraints | Select only for open-frame industrial drivers where space and thermal mass permit discrete implementation |
| ZXSBMR16P | Same die, identical electrical specs, but in SM-8 without tape-and-reel marking (ZXSBMR16PT8TA includes T8TA suffix for reel packaging) | No functional difference; T8TA denotes 1000-unit tape-and-reel shipping format per Diodes Inc. ordering guide | Choose ZXSBMR16PT8TA for automated SMT assembly; ZXSBMR16P for hand-solder prototyping or small-batch builds |
Compared with MBR1045CT, ZXSBMR16PT8TA saves 22 mm² board area and eliminates thermal interface design, while ZXSBMR16PT8TA and ZXSBMR16P differ only in packaging-making T8TA the production-ready choice for volume SMT lines.
Availability
ZXSBMR16PT8TA is available at Aetrix Electronics and suitable for MR16 LED retrofit lamps, 12V AC low-voltage lighting systems, and automotive interior lighting requiring stable component supply, AEC-Q101 compliance, and compact SM-8 integration.
Supply support for ZXSBMR16PT8TA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
ZXSBMR16PT8TA belongs to Diodes' MR16-specific LED driver component family, engineered to simplify compliance with IEC 62560 thermal limits and ErP Lot 9 standby power requirements in retrofit lamp designs.
FAQ
What is the maximum allowable ambient temperature inside the MR16 lamp housing when using ZXSBMR16PT8TA?
The datasheet specifies a maximum internal ambient temperature of 90°C for reliable operation within the MR16 enclosure. This limit assumes proper PCB copper area (≥1 cm² per terminal) and alignment with Design Note DN86's thermal layout guidelines. Exceeding 90°C risks exceeding the 125°C reverse-bias junction temperature limit.
Can ZXSBMR16PT8TA replace a standard bridge rectifier like DB107 in an MR16 driver?
No-ZXSBMR16PT8TA is not a drop-in replacement for generic bridges. It integrates both a Schottky bridge and a dedicated freewheel diode optimized for use with ZXLD1350E5 in buck-derived topologies. A DB107 lacks the freewheel path and has higher VF (~1.1V), causing excessive heat and efficiency loss in MR16 space-constrained designs.
Does ZXSBMR16PT8TA require external thermal vias or heatsinking on the PCB?
Yes-its RθJA of 125°C/W is measured on minimal FR4 copper. For continuous 0.4A operation at 90°C ambient, at least two 0.3mm thermal vias per terminal connected to ≥1 cm² internal ground plane are required. Without this, junction temperature exceeds 125°C under reverse bias, violating safe operating area limits.
How does the 3ns reverse recovery time benefit MR16 LED driver performance?
The 3ns trr minimizes switching losses and EMI generation during high-frequency buck converter operation (typically 100–500 kHz). It prevents false zero-cross detection in phase-cut dimmers and avoids voltage spikes that could degrade electrolytic input capacitors or trigger overvoltage protection in downstream controllers like ZXLD1350E5.
ZXSBMR16PT8TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-223-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Type:
- Single Phase
- Technology:
- Schottky
- Voltage - Peak Reverse (Max):
- 40 V
- Current - Average Rectified (Io):
- 400 mA
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 1 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 30 V
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SM8
ZXSBMR16PT8TA FAQ
1.How can I place an order for ZXSBMR16PT8TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXSBMR16PT8TA 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 ZXSBMR16PT8TA reliable?
The price and inventory of ZXSBMR16PT8TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXSBMR16PT8TA is usually 5 days.
3.What payment methods are accepted for ZXSBMR16PT8TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXSBMR16PT8TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXSBMR16PT8TA?
ZXSBMR16PT8TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXSBMR16PT8TA 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 ZXSBMR16PT8TA?
For technical support, including ZXSBMR16PT8TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXSBMR16PT8TA requirements.
6.How does Aetrix verify that ZXSBMR16PT8TA is sourced from the original manufacturer or authorized distributors?
All ZXSBMR16PT8TA 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 ZXSBMR16PT8TA meets industry standards.
7.What is the process for return or replacement of ZXSBMR16PT8TA?
All ZXSBMR16PT8TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXSBMR16PT8TA, 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 ZXSBMR16PT8TA part is unused and in its original packaging.
Return procedure for ZXSBMR16PT8TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXSBMR16PT8TA Tags
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