Diodes Incorporated DDZ9701Q-7

Overview

DDZ9701Q-7 from Diodes Incorporated is a surface-mount, low-current Zener diode in SOD-123 package, rated for 14 V nominal zener voltage (13.3–14.7 V range), 50 µA test current, and 500 mW power dissipation at TL = +75°C on FR-4 PCB. It features AEC-Q101 qualification, automotive PPAP capability, and is optimized for precision voltage reference and low-bias regulation in battery-powered sensor nodes.

For engineers reviewing the DDZ9701Q-7 datasheet, DDZ9701Q-7 pinout, DDZ9701Q-7 application, or DDZ9701Q-7 equivalent, this part serves as a stable, RoHS-compliant, halogen-free Zener solution for automotive infotainment power rails, industrial IoT sensor biasing, and portable medical device voltage clamping where low leakage (<50 nA @ 10.6 V) and tight voltage tolerance are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified zener voltage of 14 V at 50 µA test current, exhibiting low dynamic impedance (≈35 Ω typical at IZ = 5 mA) and temperature coefficient of +0.07 %/°C near its nominal voltage. Its thermal resistance junction-to-lead is 150 °C/W, enabling reliable operation under moderate ambient conditions when mounted per recommended SOD-123 pad layout.

The device uses alloy-42 leadframe with matte tin annealed finish, ensuring solderability per MIL-STD-202 Method 208 and compatibility with automated reflow processes. Moisture sensitivity level is rated Class 1 per J-STD-020, eliminating bake requirements prior to assembly.

Key Specifications

Pinout & Package

Package: SOD-123 - surface-mount plastic case (UL 94V-0), 0.01 g weight, cathode indicated by band marking. Dimensions: L = 0.25–0.40 mm, D = 1.40–1.70 mm, E = 2.55–2.85 mm, He = 3.55–3.85 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Compared with BZX84-C15LT1G and MMSZ5241B-TP, DDZ9701Q-7 uniquely combines 14 V precision, 500 mW thermal capability, AEC-Q101 qualification, and sub-50 nA leakage - making it the only option qualified for production automotive sensor modules requiring zero-bake assembly and PPAP traceability.

Availability

DDZ9701Q-7 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial wireless node biasing, and portable medical glucose meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for DDZ9701Q-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 distribution operations across Asia, Europe, and North America.

The DDZ9xxxQ series belongs to Diodes' automotive-qualified Zener portfolio, engineered specifically for precision voltage reference and overvoltage protection in harsh-environment electronic control units where reliability, low leakage, and regulatory compliance are mandatory.

FAQ

What is the maximum reverse voltage (V_R) at which DDZ9701Q-7 guarantees ≤50 nA leakage?

Per DS30410 Rev. 17-2, the device guarantees ≤50 nA reverse leakage current at V_R = 10.6 V. This value corresponds to 76% of its nominal 14 V zener voltage and is specified under standard test conditions (T_A = +25°C). Exceeding 10.6 V increases leakage exponentially and may trigger measurable breakdown before reaching the 13.3 V minimum V_Z.

Can DDZ9701Q-7 be used in place of a 1N4742A in a 14 V regulator circuit?

No - the 1N4742A is a 13 V, 1 W through-hole Zener with vastly different thermal behavior and leakage profile (typically ~5 µA at 10.4 V). DDZ9701Q-7 delivers tighter 14 V tolerance (±0.7 V), lower leakage (<50 nA), and SOD-123 surface-mount compatibility, but its 500 mW rating requires careful PCB thermal design. Direct substitution risks under-regulation or thermal runaway without layout revision.

Does the "Q" suffix in DDZ9701Q-7 indicate AEC-Q101 qualification for all electrical parameters?

Yes - the "Q" suffix denotes full AEC-Q101 qualification across all rated parameters: zener voltage, leakage, power dissipation, and temperature range. Electrical characteristics in the datasheet (DS30410) are measured and binned per AEC-Q101 stress test results, including HTOL, temperature cycling, and ESD (HBM ≥2 kV, CDM ≥1 kV), with PPAP documentation available upon request.

What is the recommended pad layout for optimal thermal performance of DDZ9701Q-7 on FR-4?

Diodes Incorporated specifies a minimum 1-inch² copper pad connected to the cathode terminal for optimal thermal derating. The recommended layout (documented in their Suggested Pad Layout guide) uses 0.8 mm wide traces extending from both terminals to thermal vias, with ≥4 vias (0.3 mm diameter) under the cathode pad connecting to inner-layer ground planes. This achieves the rated 500 mW at T_L = +75°C.