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Diodes Incorporated DFLT36A-7
- Part No.:
- DFLT36A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT36A-7.pdf
- Description:
- TVS DIODE 36VWM 58.1VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:9,799
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Product details
Overview
DFLT36A-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode in PowerDI123 package, designed for primary overvoltage protection on DC power rails and signal lines. It features 36V reverse standoff voltage, 40.0–44.2V breakdown voltage at 1mA, 58.1V max clamping voltage at 3.87A peak pulse current, and 225W peak pulse power dissipation (10/1000µs waveform), deployed in automotive infotainment power inputs.
For engineers reviewing the DFLT36A-7 datasheet, DFLT36A-7 pinout, DFLT36A-7 application, or DFLT36A-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, IPP capability under ISO 7637-2 Pulse 1/2a/5a, thermal resistance (RθJS = 6°C/W), and AEC-Q101 qualification status for automotive use.
Technical Context
This TVS operates as a clamping device-forward-biased during positive transients, reverse-biased during negative surges-leveraging avalanche breakdown to limit voltage excursions. Its low RθJS (6°C/W) enables effective heat transfer from junction to PCB cathode pad, supporting sustained surge handling without thermal runaway.
The device exhibits 1.0µA max reverse leakage at VRWM and 1.0mA test current for VBR, with total capacitance <15pF at 0V (f = 1MHz), making it suitable for <100Mbps data lines and 12V/24V automotive supply rails where ESD and load-dump immunity are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 36V - Maximum continuous DC voltage before significant leakage; sets minimum operating rail margin. |
| Breakdown Voltage (VBR) | 40.0–44.2V @ 1mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| Max Clamping Voltage (VC) | 58.1V @ 3.87A - Peak voltage seen by downstream circuit during 10/1000µs surge; must stay below protected IC absolute max rating. |
| Peak Pulse Power (PPK) | 225W (10/1000µs) - Sustains defined surge energy without failure; derates linearly above +25°C ambient per Fig. 1. |
| Thermal Resistance (RθJS) | 6°C/W - Junction-to-solder-point thermal path; enables direct thermal coupling to copper pour for high-reliability automotive mounting. |
| Capacitance (CT) | <15pF @ 0V, 1MHz - Low parasitic loading on high-speed lines; avoids signal integrity degradation in CAN/LIN interfaces. |
Pinout & Package
Package: PowerDI123 - surface-mount, single-cathode-band marking, molded green plastic (UL 94V-0), 0.01g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point during positive transients | Connected to protected line (e.g., 12V rail); carries full IPP during clamping. |
| Cathode | Surge current return path and thermal interface | Connected to ground plane; serves as primary heat conduction path to PCB via soldered tab. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | DFLT36AQ supports automotive PPAP and IATF 16949 manufacturing; standard DFLT36A-7 is industrial-grade. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Ensures tight voltage limiting with minimal overvoltage margin-critical for 3.3V/5V logic supply protection. |
| Green, halogen-free construction | <900ppm Br, <900ppm Cl, <1000ppm Sb; complies with RoHS 3 and automotive environmental directives. |
| Matte tin annealed terminals | Solderable per MIL-STD-202 Method 208; compatible with lead-free reflow profiles and long-term intermetallic stability. |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protects 12V supply input of BCM against ISO 7637-2 Pulse 1 (−150V, 50ms) and Pulse 5a (load dump up to +60V). IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed upstream of DC-DC converter input capacitor. Use Value: Limits transient voltage to ≤58.1V, preventing damage to buck controller ICs rated for 65V max input. |
Use Scenario: Shields 24V digital input channels from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on optocoupler input side, before series current-limiting resistor. Use Value: Absorbs 225W surges without degradation, maintaining <1µA leakage at 24V to preserve input threshold accuracy. |
| Automotive Infotainment USB VBUS Line | Smart Meter RS-485 Transceiver Port |
Use Scenario: Guards USB 5V VBUS line against ESD (IEC 61000-4-2 ±15kV contact) and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance (15pF) TVS placed directly at USB connector, before power switch. Use Value: Clamps ESD events to <9.2V (for DFLT5V0A variant) while adding negligible signal distortion to 480Mbps data. |
Use Scenario: Protects RS-485 transceiver bus pins from lightning-induced surges on long outdoor runs. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two DFLT36A-7 devices in back-to-back configuration. Use Value: Achieves ±36V standoff and ±58.1V clamping with matched VBR, enabling robust 1200m cable operation per ANSI/TIA-568. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A (Bourns) | Same 36V VRWM, but SMA package (RθJA = 100°C/W vs. 6°C/W); 400W PPK (10/1000µs); higher VF (4.5V @ 12A). | Higher thermal resistance limits sustained surge duty cycle; requires larger copper area for equivalent cooling. | Select when legacy SMA footprint compatibility is mandatory and surge repetition rate is low. |
| TPSMD36 (Texas Instruments) | 36V VRWM, 200W PPK, 60V VC @ 3.3A; RθJS = 8°C/W; AEC-Q101 qualified as standard. | Lower PPK and higher clamping reduce margin for severe load-dump events; tighter automotive qualification out-of-box. | Select for AEC-Q101–required designs where full 225W headroom is not needed and TI supply chain preference applies. |
Compared with SMAJ36A and TPSMD36, DFLT36A-7 delivers superior thermal performance (RθJS = 6°C/W) and highest surge energy absorption (225W), making it optimal for space-constrained automotive modules requiring repeated surge resilience without derating.
Availability
DFLT36A-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and smart utility metering systems requiring stable component supply across multi-year production cycles.
Supply support for DFLT36A-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
DFLT36A-7 belongs to the DFLTxxxA series of surface-mount TVS diodes engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing low clamping ratio, green packaging, and thermal efficiency.
FAQ
Is DFLT36A-7 AEC-Q101 qualified?
No-DFLT36A-7 is the industrial-grade version. The automotive-qualified variant is DFLT36AQ, which undergoes AEC-Q101 stress testing, PPAP documentation, and is manufactured in IATF 16949-certified facilities. DFLT36A-7 meets all electrical and mechanical specs but lacks formal automotive qualification documentation.
What is the recommended PCB layout for thermal performance?
Use a minimum 1-inch² 2oz copper pad connected to the cathode terminal, with ≥4 thermal vias (0.3mm diameter, filled or plated) to inner ground planes. Avoid solder mask over the cathode pad to maximize thermal conduction, per Diodes' recommended PowerDI123 pad layout (X1 = 2.40mm, Y = 1.50mm).
Can DFLT36A-7 be used for bidirectional protection?
Yes-by connecting two DFLT36A-7 devices in series opposing configuration (anode-to-anode), achieving ±36V standoff and ±58.1V clamping. This method avoids specialized bidirectional TVS parts while preserving low capacitance and matching VBR tolerance across polarity.
How does DFLT36A-7 perform under repeated surge conditions?
It sustains repetitive 10/1000µs pulses at ≤1Hz with full 225W rating at +25°C; derating follows Fig. 1-e.g., 150W at +85°C ambient. Pulse width and duty cycle must remain within datasheet-defined non-repetitive limits unless validated per application-specific thermal modeling.
DFLT36A-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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 3.87A
- 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
DFLT36A-7 FAQ
1.How can I place an order for DFLT36A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT36A-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 DFLT36A-7 reliable?
The price and inventory of DFLT36A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT36A-7 is usually 5 days.
3.What payment methods are accepted for DFLT36A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT36A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT36A-7?
DFLT36A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT36A-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 DFLT36A-7?
For technical support, including DFLT36A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT36A-7 requirements.
6.How does Aetrix verify that DFLT36A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT36A-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 DFLT36A-7 meets industry standards.
7.What is the process for return or replacement of DFLT36A-7?
All DFLT36A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT36A-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 DFLT36A-7 part is unused and in its original packaging.
Return procedure for DFLT36A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT36A-7 Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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