My Inquiry
My Account
Diodes Incorporated DFLT12A-7
- Part No.:
- DFLT12A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT12A-7.pdf
- Description:
- TVS DIODE 12VWM 19.9VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:16,591
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DFLT12A-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode in PowerDI123 package, designed for board-level overvoltage protection in DC power lines and signal interfaces. It features a 12 V reverse standoff voltage (VRWM), 13.3–14.7 V breakdown voltage (VBR), 19.9 V max clamping voltage at 11.3 A peak pulse current, and 225 W peak pulse power rating (10/1000 µs waveform), deployed in automotive infotainment power rails.
For engineers reviewing the DFLT12A-7 datasheet, DFLT12A-7 pinout, DFLT12A-7 application, or DFLT12A-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC tolerance, Ipp derating at elevated ambient temperature, thermal resistance to PCB (RθJS = 6 °C/W), and compliance with AEC-Q101 for automotive-grade surge immunity.
Technical Context
This TVS operates as a clamping device-non-conductive below VRWM (12 V), entering avalanche breakdown at VBR (min 13.3 V), and limiting transient energy by shunting surge current to ground while holding VC ≤ 19.9 V at IPP = 11.3 A. Its unidirectional architecture provides asymmetric protection optimized for positive-going transients on grounded-return systems.
Thermal design relies on low RθJS (6 °C/W) to sustain repetitive surges, enabled by direct cathode tab thermal coupling to PCB copper. The 1.0 W DC power dissipation rating and 125 °C/W RθJA (FR-4, 1"² 2 oz Cu) define steady-state thermal limits, while pulse derating curves govern transient duty cycle handling above +25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 12 V - Maximum continuous DC operating voltage before leakage exceeds 2.5 µA; sets upper limit for protected line nominal voltage. |
| Breakdown Voltage (VBR) | 13.3–14.7 V @ 1.0 mA - Confirmed avalanche onset range; ensures reliable turn-on before downstream IC damage threshold. |
| Max Clamping Voltage (VC) | 19.9 V @ IPP = 11.3 A - Peak voltage seen by protected circuit during 10/1000 µs surge; must be below IC absolute maximum rating. |
| Peak Pulse Power (PPK) | 225 W (10/1000 µs) - Surge energy-handling capacity; defines protection level against ISO 7637-2 Pulse 1/2a/5a waveforms. |
| Thermal Resistance (RθJS) | 6 °C/W - Junction-to-solder-joint thermal resistance; enables efficient heat transfer to PCB copper pad for repeated surge events. |
| Package | PowerDI123 - Surface-mount, single-cathode-band package with exposed cathode tab for thermal and electrical grounding. |
Pinout & Package
DFLT12A-7 uses the PowerDI123 package: a 3-pin surface-mount outline with an exposed cathode tab (pin 2) serving as both electrical return and primary thermal path. Cathode identification is marked by a band on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Transient current entry point | Connected to protected line; carries full surge current into device during clamping event. |
| Cathode (Pin 2, Tab) | Current return & thermal interface | Electrically tied to system ground; soldered directly to large PCB copper area for low-inductance discharge and heat sinking. |
| No Pin 3 | N/A | PowerDI123 is a 2-terminal device; "3" in package name refers to outline dimensions, not pin count. |
Key Features
| Feature | Design Value |
|---|---|
| 225 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream components-critical for 13.5 V nominal supply rails with ±10% tolerance. |
| RθJS = 6 °C/W | Enables >5× higher thermal power handling vs. standard SOD-123 packages, allowing sustained operation under repetitive surge conditions. |
| AEC-Q101 qualified variant available (DFLT12AQ) | Ensures validated reliability for automotive applications including engine control modules and body electronics requiring PPAP documentation. |
Applications
| Automotive Infotainment Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting USB-C PD controller and display power sequencing circuitry from load dump transients in vehicle head units. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 12 V supply rail and ground, activated within nanoseconds of overvoltage onset. Use Value: Limits voltage to ≤19.9 V during 11.3 A surge, preventing latch-up or permanent damage to 20 V-rated PMICs and USB-C controllers. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced inductive kickback. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminal and common ground, absorbing energy from relay coil de-energization spikes. Use Value: Clamps transients to <20 V within 1 ns, preserving input comparator integrity and eliminating false triggering in SIL-2 compliant systems. |
| Telecom PoE+ Data Line Surge Suppression | Medical Patient Monitor ESD Interface Protection |
Use Scenario: Secondary surge protection on 48 V PoE+ data pairs upstream of integrated Ethernet PHY transceivers. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed differential-mode across each twisted pair, referenced to local ground plane. Use Value: Delivers 225 W pulse handling while maintaining <50 pF capacitance at 0 V bias, avoiding signal integrity degradation at 100 MHz Ethernet frequencies. | Use Scenario: IEC 61000-4-2 Level 4 ESD protection on front-panel USB and HDMI ports of Class II medical devices. IC Role / Device Role / Timing Role: Board-level TVS mounted at connector entry point, shunting ±15 kV contact discharge energy to chassis ground. Use Value: Achieves <1 ns response time and <20 V clamping, ensuring no ESD-induced reset or data corruption in real-time patient monitoring firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same VRWM (12 V) and VC (20.1 V), but SMA package (RθJA = 150 °C/W); lower PPK (400 W) only at 8/20 µs, not 10/1000 µs. | Less effective for long-duration transients (e.g., ISO 7637-2 Pulse 5a); requires larger PCB footprint and lacks AEC-Q101 option. | Select when cost sensitivity outweighs thermal performance and automotive qualification needs. |
| DFLT12AQ | Identical electrical specs, but fully AEC-Q101 qualified, manufactured in IATF 16949 facility, with PPAP support and automotive change control. | Mandatory for Tier-1 automotive BOMs; supports zero-defect manufacturing requirements and extended temperature validation (-40°C to +150°C). | Select for production automotive programs requiring documented qualification and supply chain traceability. |
Compared with SMAJ12A and DFLT12AQ, DFLT12A-7 offers superior thermal management (RθJS = 6 °C/W) and industry-standard packaging for high-volume SMT assembly, while DFLT12AQ adds automotive compliance without sacrificing electrical performance.
Availability
DFLT12A-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC input modules, and telecom PoE+ equipment requiring stable component supply, consistent parametric performance, and RoHS-compliant green packaging.
Supply support for DFLT12A-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and sales operations across Asia, the Americas, and Europe.
DFLT12A-7 belongs to the DFLTxxxA series of high-power unidirectional TVS diodes, engineered specifically for board-level transient suppression in automotive, industrial, and communications infrastructure where compact size, low clamping voltage, and repeatable surge endurance are critical.
FAQ
What is the marking code for DFLT12A-7?
The top-side marking for DFLT12A-7 is "FBE", followed by a two-character date code (e.g., "N9" for September 2026). This matches the Electrical Characteristics Table on page 2 of DS30581 Rev. 12–2, where DFLT12A is assigned FBE as its product type code.
Can DFLT12A-7 be used in bidirectional configurations?
No-DFLT12A-7 is strictly unidirectional. It conducts only during positive transients on the anode relative to cathode. For bidirectional protection (e.g., AC lines or data pairs), two DFLT12A-7 devices must be connected in series opposition, or a dedicated bidirectional part like DFL12A-7 should be selected.
What is the maximum allowable PCB pad temperature during reflow soldering?
DFLT12A-7 complies with J-STD-020 moisture sensitivity level 1, permitting unlimited floor life and standard lead-free reflow profiles. Peak solder temperature must not exceed 260°C for ≤30 seconds, with ramp rates ≤3°C/s, per Diodes' packaging specifications and JEDEC standards.
How does DFLT12A-7 perform under repeated surge stress?
Under repeated 10/1000 µs pulses at 11.3 A, DFLT12A-7 maintains clamping stability provided junction temperature remains ≤150°C. Derating is required above +25°C ambient per Figure 1; at +85°C, maximum usable PPK drops to ~135 W (60% of rated value), enforced by thermal design using ≥1"² 2 oz Cu pad.
DFLT12A-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- Power - Peak Pulse:
- 225W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLT12A-7 FAQ
1.How can I place an order for DFLT12A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT12A-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 DFLT12A-7 reliable?
The price and inventory of DFLT12A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT12A-7 is usually 5 days.
3.What payment methods are accepted for DFLT12A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT12A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT12A-7?
DFLT12A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT12A-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 DFLT12A-7?
For technical support, including DFLT12A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT12A-7 requirements.
6.How does Aetrix verify that DFLT12A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT12A-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 DFLT12A-7 meets industry standards.
7.What is the process for return or replacement of DFLT12A-7?
All DFLT12A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT12A-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 DFLT12A-7 part is unused and in its original packaging.
Return procedure for DFLT12A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT12A-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…
