My Inquiry
My Account
Diodes Incorporated DFLT28AQ-7
- Part No.:
- DFLT28AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT28AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PDI
- Quantity:
- Payment:
- Shipping:
Inventory:5,166
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DFLT28AQ-7 from Diodes Incorporated is a 28 V unidirectional transient voltage suppressor (TVS) diode in PowerDI®123 package, rated for 225 W peak pulse power (10/1000 µs), 45.4 V max clamping voltage at 4.96 A IPP, and AEC-Q101 qualified for automotive power line protection.
For engineers reviewing the DFLT28AQ-7 datasheet, DFLT28AQ-7 pinout, DFLT28AQ-7 application, or DFLT28AQ-7 equivalent, key selection criteria include reverse standoff voltage (28 V), clamping performance under surge, thermal resistance (RθJS = 6 °C/W), and IATF 16949 manufacturing compliance for mission-critical automotive systems.
Technical Context
This TVS diode operates as a unidirectional shunt protector with cathode-band polarity, designed to clamp transient overvoltages on DC power rails before they damage downstream ICs. Its low RθJS (6 °C/W) enables effective heat transfer from junction to PCB solder joint under repetitive surge stress.
The device exhibits 1.0 µA max reverse leakage at VRWM and achieves stable breakdown at 31.1–34.4 V (IT = 1.0 mA), ensuring precise voltage thresholding without premature conduction during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 28 V - Maximum continuous DC operating voltage before significant leakage begins. |
| Breakdown Voltage (VBR) | 31.1–34.4 V @ 1.0 mA - Confirmed avalanche onset range for reliable overvoltage triggering. |
| Max Clamping Voltage (VC) | 45.4 V @ IPP = 4.96 A - Peak voltage seen by protected circuit during 10/1000 µs surge. |
| Peak Pulse Power (PPK) | 225 W (10/1000 µs) - Surge energy handling capacity per single transient event. |
| Thermal Resistance (RθJS) | 6 °C/W - Junction-to-solder-point thermal path efficiency critical for PCB-level thermal design. |
| Operating Temperature | −55 to +150 °C - Full automotive-grade temperature range supporting under-hood deployment. |
Pinout & Package
Package: PowerDI®123 - surface-mount, single-ended cathode-band configuration with matte tin annealed terminals; case material is UL 94V-0 green molding compound; weight ≈ 0.01 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected power rail; current flows into anode during forward conduction or clamping. |
| Cathode | Output/Ground reference terminal | Marked with band; tied to system ground or low-impedance return path to complete clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and IATF 16949 manufacturing control. |
| Green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); RoHS 3 compliant. |
| Low RθJS | 6 °C/W enables high-power transient dissipation without excessive junction temperature rise. |
| Stable clamping ratio | VC/VRWM = 1.62 - tight margin between standoff and clamping ensures robust protection headroom. |
Applications
| Automotive Power Supply Protection | Infotainment System ESD Suppression |
|---|---|
Use Scenario: 12 V battery line in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed upstream of LDOs and microcontrollers to clamp transients below safe IC thresholds. Use Value: 45.4 V clamping at 4.96 A ensures downstream 3.3 V/5 V logic remains within absolute maximum ratings during 100 V/50 ms load dump events. |
Use Scenario: USB and HDMI power lines in head unit modules subject to human-body-model (HBM) and IEC 61000-4-2 ESD events. IC Role / Device Role / Timing Role: Fast-response TVS absorbing sub-100 ns ESD spikes before they couple into signal integrity paths. Use Value: Sub-1 ns response time and 1.0 µA leakage preserve signal integrity while meeting automotive ESD immunity requirements up to ±15 kV contact discharge. |
| Body Control Module (BCM) CAN Bus Power Rail | ADAS Camera Module Input Protection |
Use Scenario: 5 V or 12 V supply feeding CAN transceivers in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary overvoltage guard on transceiver VCC pins to prevent latch-up or permanent damage from wiring faults. Use Value: 225 W peak power rating sustains multiple ISO 16750-2 pulse 5a (100 V/40 ms) surges without degradation across vehicle lifetime. |
Use Scenario: 12 V input to image sensor power management ICs in surround-view camera systems. IC Role / Device Role / Timing Role: First-line defense against induced transients from adjacent motor drivers or switching regulators. Use Value: −55 to +150 °C operating range and low capacitance (<100 pF at 0 V) prevent signal distortion while enabling under-hood mounting near lens assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Same VRWM (28 V), but higher VC (48.4 V @ 5.2 A) and lower PPK (400 W). | Higher clamping voltage reduces protection margin for sensitive 3.3 V logic; suited for less demanding industrial rails. | Select when cost sensitivity outweighs clamping precision and automotive qualification is not required. |
| SMCJ28A | Same VRWM (28 V), higher PPK (1500 W), larger DO-214AB package (RθJA = 20 °C/W vs. 120 °C/W). | Slower thermal response and board space penalty limit suitability for compact automotive modules. | Prefer only where surge energy exceeds 225 W and PCB layout allows larger footprint and thermal relief. |
Compared with SMAJ28A and SMCJ28A, DFLT28AQ-7 delivers superior automotive compliance, tighter clamping (45.4 V), and optimized thermal performance in a space-constrained PowerDI123 package-making it the preferred choice for modern ECU and ADAS power rail protection.
Availability
DFLT28AQ-7 is available at Aetrix Electronics and suitable for automotive power supply protection, infotainment system ESD suppression, and body control module (BCM) CAN bus power rail applications requiring stable component supply and full AEC-Q101 traceability.
Supply support for DFLT28AQ-7 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-reliability components for automotive, industrial, and computing markets.
The DFLTxxxAQ series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient suppression in automotive power distribution networks and safety-critical electronic control units.
FAQ
What is the polarity configuration of DFLT28AQ-7?
DFLT28AQ-7 is a unidirectional TVS diode with cathode-band marking. It conducts in forward bias like a standard diode and clamps reverse transients by avalanche breakdown at its specified breakdown voltage range (31.1–34.4 V). The cathode must be connected to ground or the lowest potential node in the protected circuit.
Does DFLT28AQ-7 meet automotive qualification standards?
Yes, DFLT28AQ-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. It supports automotive change control requirements and is rated for operation from −55 to +150 °C, making it suitable for engine bay, chassis, and ADAS applications.
How does the PowerDI123 package affect thermal performance?
The PowerDI123 package provides RθJS = 6 °C/W (junction-to-solder point), significantly lower than standard SOD-123 or SMA packages. This enables efficient heat transfer directly to the PCB copper pad, allowing sustained 225 W pulse handling without exceeding maximum junction temperature limits under defined mounting conditions.
What is the typical capacitance of DFLT28AQ-7 at zero bias?
While not explicitly listed for DFLT28AQ-7 in the datasheet, the DFLT5V0AQ–DFLT40AQ family shows total capacitance decreasing with increasing VRWM - e.g., DFLT5V0AQ measures ~2400 pF at 0 V. For DFLT28AQ-7, typical capacitance is estimated ≤100 pF at 0 V based on the inverse relationship shown in Figure 6, supporting high-speed data line compatibility.
DFLT28AQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- POWERDI®123
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 4.96A
- Power - Peak Pulse:
- 225W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLT28AQ-7 FAQ
1.How can I place an order for DFLT28AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT28AQ-7 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 DFLT28AQ-7 reliable?
The price and inventory of DFLT28AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT28AQ-7 is usually 5 days.
3.What payment methods are accepted for DFLT28AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT28AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT28AQ-7?
DFLT28AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT28AQ-7 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 DFLT28AQ-7?
For technical support, including DFLT28AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT28AQ-7 requirements.
6.How does Aetrix verify that DFLT28AQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLT28AQ-7 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 DFLT28AQ-7 meets industry standards.
7.What is the process for return or replacement of DFLT28AQ-7?
All DFLT28AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT28AQ-7, 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 DFLT28AQ-7 part is unused and in its original packaging.
Return procedure for DFLT28AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT28AQ-7 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
