Renesas RKZ16B2KJ#R1

Overview

RKZ16B2KJ from Renesas Electronics is a silicon planar Zener diode designed for precision voltage stabilization and transient surge absorption in low-power signal and bias circuits. It delivers a nominal Zener voltage of 16.18 V (min 15.85 V, max 16.51 V) at 5 mA, with dynamic resistance of 40 Ω, maximum reverse current of 2 μA at 12.0 V, and ESD capability of ±25 kV (HBM, C = 150 pF, R = 330 Ω). It is used in overvoltage clamping for microcontroller I/O protection and reference voltage generation in sensor interface circuits.

For engineers reviewing the RKZ16B2KJ datasheet, RKZ16B2KJ pinout, RKZ16B2KJ application, or RKZ16B2KJ equivalent, key selection criteria include its 150 mW power rating at 25°C, ultra-small UFP (SC-79) surface-mount package, temperature coefficient behavior near zero crossing (~0.02 %/°C), and verified HBM ESD robustness-critical for industrial sensor nodes and portable instrumentation.

Technical Context

This device operates as a two-terminal, passive voltage reference and clamp, relying on controlled Zener breakdown in the reverse-biased junction. Its electrical behavior is defined by tight V_Z tolerance (±2.1% at 5 mA), low dynamic impedance (40 Ω), and stable temperature coefficient near 16 V-where γ_Z transitions from negative to positive, minimizing drift in mid-range bias networks.

The RKZ16B2KJ is optimized for DC stabilization and low-energy transient suppression-not high-current surge handling. Its 150 mW power dissipation derates linearly above 25°C (see Fig.3), and its non-repetitive surge capability is limited to ~0.5 W for 1 ms pulses, making it unsuitable for AC line or lightning-level protection.

Key Specifications

Pinout & Package

Ultra-small Flat Lead (UFP) package per JEITA code PWSF0002ZA-A (Renesas code: UFP/UFPV), SC-79 compliant, mass ≈ 0.0016 g. Dimensions: 1.70 mm (L) × 1.20 mm (W) × 0.60 mm (T), lead pitch 0.70 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C16LT1G and MMSZ4687T1G, the RKZ16B2KJ offers superior space efficiency (UFP vs. SOT-23/SOD-123), tighter V_Z tolerance (±2.1% vs. ±5%), and industry-leading ±25 kV HBM ESD rating-making it optimal for miniaturized, field-deployable, and high-reliability analog subsystems.

Availability

RKZ16B2KJ is available at Aetrix Electronics and suitable for industrial sensor conditioning, microcontroller I/O protection, and portable instrument reference voltage generation requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.

Supply support for RKZ16B2KJ 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications.

The RKZ-KJ Series is part of Renesas' discrete protection portfolio, engineered specifically for precision voltage stabilization and low-energy transient suppression in space-constrained, high-reliability signal-path applications.

FAQ

What is the Zener voltage tolerance of RKZ16B2KJ at 5 mA?

The RKZ16B2KJ exhibits a Zener voltage range of 15.85 V to 16.51 V at test current I_Z = 5 mA, corresponding to a ±2.1% tolerance about the nominal 16.18 V value. This tight specification is confirmed in the Electrical Characteristics table of Renesas document REJ03G1588-0100 and enables single-diode reference designs without trimming. The RKZ16B2KJ maintains this tolerance across its qualified operating temperature range.

Does RKZ16B2KJ support automated optical inspection (AOI) after reflow?

Yes, the RKZ16B2KJ uses embossed taping in UFP (SC-79) package with clearly defined cathode marking-enabling reliable AOI detection of polarity and placement accuracy. Its 1.7 × 1.2 mm footprint and 0.7 mm lead pitch meet IPC-A-610 Class 2 requirements for automated visual verification. The RKZ16B2KJ's flat lead geometry also minimizes tombstoning risk during reflow, further supporting AOI yield.

Can RKZ16B2KJ be used as a replacement for a 16 V Zener in legacy through-hole designs?

No-the RKZ16B2KJ is a surface-mount UFP (SC-79) device with 0.7 mm lead pitch and 1.7 × 1.2 mm body; it has no through-hole variant or adapter. Direct substitution requires PCB redesign. For through-hole equivalents, consider axial-lead 1N4745A (16 V, ±5%, DO-41), but note its looser tolerance, higher r_d, and absence of certified ±25 kV HBM ESD rating. The RKZ16B2KJ is not pin-compatible with any through-hole Zener.

What is the maximum allowable reverse voltage before significant leakage in RKZ16B2KJ?

The RKZ16B2KJ specifies maximum reverse current I_R ≤ 2 μA at V_R = 12.0 V. Below this voltage, leakage remains sub-microampere-verified in the Electrical Characteristics table. At 15.0 V (just below V_Z min), I_R remains <0.5 μA. Engineers should avoid sustained operation above 12 V unless clamping action is intended, as leakage rises exponentially near V_Z. The RKZ16B2KJ's low I_R supports high-impedance bias networks.

Is RKZ16B2KJ compliant with AEC-Q200 for automotive use?

No-RKZ16B2KJ is classified as a "Standard" quality grade device per Renesas documentation and is not AEC-Q200 qualified. It is rated for industrial applications (−55°C to +150°C junction), but lacks the stress testing, failure analysis, and traceability required for automotive electronic modules. For AEC-Q200-compliant 16 V Zeners, consider alternatives like BZX84-A16 (AEC-Q200 Grade 3). The RKZ16B2KJ is intended for industrial, medical, and consumer systems-not safety-critical automotive functions.