Diodes Incorporated DDZ5V1BS-7

Overview

DDZ5V1BS-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 5.1 V, ±2.5% tolerance (4.94–5.20 V), 17 Ω zener impedance at 20 mA, and 1 µA maximum reverse leakage at 1.5 V. It operates in SOD123 package, rated for 470 mW power dissipation at 25°C ambient, and is optimized for voltage reference and regulation in low-power analog circuits.

For engineers reviewing the DDZ5V1BS-7 datasheet, DDZ5V1BS-7 pinout, DDZ5V1BS-7 application, or DDZ5V1BS-7 equivalent, key selection criteria include tight V_Z tolerance, low dynamic impedance, thermal stability across -65°C to +150°C, and compatibility with automated SMT assembly on FR-4 PCBs using standard 1-in² copper pad layouts.

Technical Context

This Zener diode employs silicon planar epitaxial construction to achieve stable breakdown characteristics under controlled test conditions (I_ZT = 20 mA, pulse test). Its low 17 Ω dynamic impedance at I_ZT ensures minimal output voltage variation under load transients, while the -65°C to +150°C operating range supports industrial and automotive environments.

The device exhibits a temperature coefficient of approximately +0.04%/°C near 5.1 V (per Fig. 16), enabling predictable drift compensation in reference designs. Its SOD123 package features matte tin–annealed Alloy 42 leads, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 flammability rating - all verified per DS30407 Rev. 21-2.

Key Specifications

Pinout & Package

SOD123 package: 2-terminal surface-mount device with molded plastic body (UL 94V-0), cathode identified by band marking. Terminals are matte tin–annealed Alloy 42 leads, solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C5V1 and MMSZ5231B, DDZ5V1BS-7 delivers superior initial accuracy (±2.5% vs. ±5%) and guaranteed low-impedance performance at 20 mA - critical for high-resolution data acquisition and automotive reset circuits where tolerance-driven margining is unacceptable.

Availability

DDZ5V1BS-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, medical portable device power monitoring, and telecom line card voltage clamping requiring stable component supply and long-term lifecycle support.

Supply support for DDZ5V1BS-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 industrial, automotive, and computing markets.

The DDZ series targets precision voltage reference applications demanding tight V_Z tolerance, low dynamic impedance, and robust thermal performance in compact SMD packages - specifically engineered for next-generation sensor interfaces and automotive ECUs.

FAQ

What is the maximum steady-state power dissipation for DDZ5V1BS-7 at 75°C ambient?

At T_L = +75°C, DDZ5V1BS-7 is rated for 500 mW power dissipation (per Note 6 in DS30407). This assumes lead temperature-controlled mounting per JEDEC standards, not ambient-only derating. For standard FR-4 PCB mounting at 75°C ambient, apply the derating curve in Figure 1: ~330 mW is sustainable based on R_θJA = 266 °C/W.

Does DDZ5V1BS-7 meet AEC-Q101 requirements?

No - DDZ5V1BS-7 is the commercial-grade variant (suffix "-7"). The automotive-qualified version is DDZ5V1BQ-7 (with "Q" suffix), which is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities. Electrical specs are identical, but qualification documentation and traceability differ.

How does the 17 Ω zener impedance affect regulation accuracy under load variation?

With Z_ZT = 17 Ω at 20 mA, a ±1 mA change in zener current produces ±17 mV output shift. In a typical 5.1 V reference with 10 kΩ series resistor, this translates to <±0.3% regulation error across ±10% load current swings - sufficient for 12-bit ADC references but marginal for 16-bit systems without additional buffering.

Can DDZ5V1BS-7 be used in place of a 5.0 V Zener diode?

Yes, but with design awareness: its nominal 5.1 V (4.94–5.20 V) exceeds 5.0 V by up to 4%. If circuit timing or comparator thresholds depend critically on exactly 5.0 V, this 200 mV headroom may cause functional mismatch. Verify downstream logic thresholds and regulator dropout margins before substitution.