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Diodes Incorporated DFLZ10Q-7
- Part No.:
- DFLZ10Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ10Q-7.pdf
- Description:
- DIODE ZENER 10V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:3,459
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Product details
Overview
DFLZ10Q-7 from Diodes Incorporated is a 10 V, 1.0 W surface-mount power Zener diode in PowerDI123 package, rated for 5 µA maximum reverse leakage at 7.5 V, with 1 Ω typical Zener impedance at 100 mA test current and ±0.05 to +0.09 %/°C temperature coefficient - used for precision voltage regulation in automotive engine control units.
For engineers reviewing the DFLZ10Q-7 datasheet, DFLZ10Q-7 pinout, DFLZ10Q-7 application, or DFLZ10Q-7 equivalent, key selection criteria include Zener voltage tolerance (±6%), thermal resistance junction-to-solder point (9 °C/W), AEC-Q101 qualification, RoHS/halogen-free compliance, and 1000 V surge capability enabled by patented interlocking clip design.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its low RθJS (9 °C/W) and exposed thermal pad enable reliable 1 W dissipation on FR-4 PCBs with 1" × 1" copper pad.
The device features a cathode-band polarity marking, matte tin–annealed copper leadframe, and is qualified to AEC-Q101 for automotive applications. It exhibits 10 V nominal Zener voltage at 100 mA (IZT), with 1 Ω typical dynamic impedance (ZZT) and 5 µA max reverse current (IR) at 7.5 V (VR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V nominal, 9.4–10.6 V range at 100 mA - defines regulated output voltage tolerance for feedback loops. |
| Power Dissipation (PD) | 1.0 W on FR-4 PCB - supports sustained regulation in compact automotive modules without forced cooling. |
| Zener Impedance (ZZT) | 1 Ω typical at 100 mA - ensures minimal output voltage shift under dynamic load transients. |
| Reverse Leakage (IR) | 5 µA max at 7.5 V - guarantees low quiescent current in always-on voltage monitor circuits. |
| Temp. Coefficient (αVZ) | +0.05 to +0.09 %/°C - enables predictable drift compensation in engine bay environments up to +125°C ambient. |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-solder point - allows direct thermal coupling to PCB ground plane for efficient heat extraction. |
Pinout & Package
Package: PowerDI123 - molded green compound, UL 94V-0 rated, 0.01 g weight, moisture sensitivity level 1. Exposed cathode tab serves as primary thermal and electrical path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to system ground or lower-potential node; reverse-biased during regulation. |
| Cathode | Zener breakdown terminal / thermal pad | Marked with band; soldered to large copper area for heat dissipation and low-inductance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Patented interlocking clip | Enables 1000 V surge withstand per AEC-Q101 transient test, critical for 12 V automotive load-dump protection. |
| AEC-Q101 qualification | Validated for automotive under-hood operation from −55°C to +150°C junction temperature with PPAP support. |
| Halogen- and antimony-free "Green" | Meets EU RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm - required for Tier-1 automotive sourcing. |
| Low RθJS (9 °C/W) | Reduces thermal derating: full 1 W usable up to +100°C ambient on standard 2 oz. FR-4, simplifying thermal design. |
Applications
| Engine Control Unit (ECU) Reference | ADAS Camera Power Rail Clamp |
|---|---|
|
Use Scenario: Stabilizing 5 V microcontroller supply rail against battery voltage spikes during cold-crank or load dump. IC Role / Device Role / Timing Role: Shunt regulator clamping transient overvoltage above 10 V while sinking up to 100 mA peak current. Use Value: Prevents MCU brown-out or latch-up during ISO 7637-2 Pulse 5a (100 V/100 ms) events without external TVS cascade. |
Use Scenario: Protecting 3.3 V image sensor I/O lines from ESD and cable-induced surges in rear-view camera modules. IC Role / Device Role / Timing Role: Low-capacitance (≈15 pF) Zener clamp placed between signal line and ground, activated only above 10 V. Use Value: Maintains signal integrity below 3.3 V while clamping >10 V transients with sub-ns response-no added propagation delay. |
| Electric Power Steering (EPS) Sensor Bias | On-Board Charger (OBC) Feedback Divider |
|
Use Scenario: Providing stable bias voltage to Hall-effect torque sensors operating in high-EMI motor environments. IC Role / Device Role / Timing Role: Precision 10 V reference source with <±0.1% drift over −40°C to +125°C, feeding ADC reference input. Use Value: Enables <±0.5% torque measurement accuracy despite ambient thermal cycling and PWM noise coupling. |
Use Scenario: Setting output voltage of isolated DC-DC converter in 400 V EV onboard charger via resistive divider. IC Role / Device Role / Timing Role: High-stability Zener in upper leg of feedback network, minimizing divider ratio drift with temperature. Use Value: Reduces output voltage error from ±2% to ±0.8% across full temperature range, meeting IEC 61851-1 Class B limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C10LT1G | 0.3 W rating, SOT-23 package, 20 Ω ZZT, no AEC-Q101 qualification | Limited to low-power consumer electronics; unsuitable for automotive surge or thermal stress | Select only for cost-sensitive non-automotive designs where 100 mA surge current is never expected. |
| MMSZ5240B-TP | 0.5 W, SOD-123, 17 Ω ZZT, ±5% VZ tolerance, no interlocking clip | Lower surge immunity; requires additional TVS for ISO 7637-2 compliance | Acceptable for industrial controls with controlled environment, but not for under-hood automotive use. |
Compared with BZX84-C10LT1G and MMSZ5240B-TP, DFLZ10Q-7 delivers 3.3× higher power handling, 17× lower Zener impedance, and certified AEC-Q101 reliability - making it the sole choice for production automotive voltage regulation where thermal stability and surge survivability are non-negotiable.
Availability
DFLZ10Q-7 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, electric power steering systems, and onboard chargers requiring stable component supply with full automotive traceability and long-term lifecycle assurance.
Supply support for DFLZ10Q-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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The DFLZ series belongs to Diodes' AEC-Q101-qualified Power Zener portfolio, engineered specifically for automotive voltage regulation, ESD protection, and reference stability in harsh thermal and electrical environments.
FAQ
What is the maximum surge current DFLZ10Q-7 can withstand?
DFLZ10Q-7 is rated for 1000 V surge per AEC-Q101 transient test methodology, enabled by its patented interlocking clip structure. This corresponds to peak surge currents exceeding 10 A for 100 µs pulses when mounted on a 1" × 1" 2 oz. copper pad - validated in Diodes' internal load-dump simulation per ISO 7637-2 Pulse 5a.
Does DFLZ10Q-7 require a heatsink for 1 W operation?
No external heatsink is required. With RθJS = 9 °C/W and proper PCB layout (1" × 1" 2 oz. copper pad), DFLZ10Q-7 maintains junction temperature below 150°C at full 1 W dissipation up to +100°C ambient. Derating begins linearly above that ambient per Figure 1 in DS36898 Rev. 3-2.
How does the Zener voltage tolerance affect feedback loop accuracy?
The ±6% VZ tolerance (9.4–10.6 V) directly propagates into resistor-divider-based feedback networks. For a 3.3 V output using 10 V reference, this introduces ±0.2 V output variation - mitigated by using tighter-tolerance external resistors or closed-loop compensation in the controller IC.
Can DFLZ10Q-7 be used in place of a 1N4740A?
No - DFLZ10Q-7 is not a drop-in replacement for 1N4740A. While both are 10 V Zeners, DFLZ10Q-7 uses PowerDI123 package with exposed cathode thermal pad and AEC-Q101 qualification, whereas 1N4740A is DO-41 through-hole with 1 W rating but no automotive qualification or low RθJS. PCB layout and reliability requirements differ fundamentally.
DFLZ10Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLZ10Q-7 FAQ
1.How can I place an order for DFLZ10Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ10Q-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 DFLZ10Q-7 reliable?
The price and inventory of DFLZ10Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ10Q-7 is usually 5 days.
3.What payment methods are accepted for DFLZ10Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ10Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ10Q-7?
DFLZ10Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ10Q-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 DFLZ10Q-7?
For technical support, including DFLZ10Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ10Q-7 requirements.
6.How does Aetrix verify that DFLZ10Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ10Q-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 DFLZ10Q-7 meets industry standards.
7.What is the process for return or replacement of DFLZ10Q-7?
All DFLZ10Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ10Q-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 DFLZ10Q-7 part is unused and in its original packaging.
Return procedure for DFLZ10Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLZ10Q-7 Tags
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