Renesas RD13MW-T1B-A

Overview

RD13MW-T1B-A from Renesas Electronics is a 3-pin Mini Mold (SC-59) zener diode with nominal zener voltage 13 V, 200 mW power dissipation, and ±5% tolerance (Class B), used for precision voltage reference, ESD protection, and surge absorption in low-power analog circuits.

For engineers reviewing the RD13MW-T1B-A datasheet, RD13MW-T1B-A pinout, RD13MW-T1B-A application, or RD13MW-T1B-A equivalent, key selection criteria include zener voltage range (12.47–13.96 V at 5 mA), dynamic impedance (≤35 Ω), reverse leakage (≤2 µA at 10 V), thermal resistance (625 °C/W), and SC-59 package compatibility with automated SMT assembly.

Technical Context

This device operates as a two-terminal voltage regulator in reverse-bias mode, with stable breakdown behavior across ambient temperatures up to +150°C junction temperature. Its dual-cathode configuration (K1 and K2) enables bidirectional surge clamping on either side of the anode.

The RD13MW-T1B-A complies with E24 standard voltage grading and supports transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), with peak reverse power rating of 85 W for 10 µs pulses and forward voltage ≤0.90 V at 5 mA.

Key Specifications

Pinout & Package

RD13MW-T1B-A uses the SC-59 (EIAJ) 3-pin Mini Mold package: Pin 1 = Cathode K1, Pin 2 = Cathode K2, Pin 3 = Anode A. The dual-cathode structure permits symmetrical bidirectional clamping relative to the common anode terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C13LT1G and MMBZ5242B, RD13MW-T1B-A uniquely delivers integrated bidirectional clamping in a single SC-59 package with verified 85 W transient capability-critical for industrial fieldbus and automotive body electronics where layout density and surge robustness are co-constrained.

Availability

RD13MW-T1B-A is available at Aetrix Electronics and suitable for USB port protection, industrial sensor biasing, low-power IoT voltage references, and RS-485 surge suppression requiring stable component supply and long-lifecycle support.

Supply support for RD13MW-T1B-A 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 enterprise applications.

The RD series zener diodes were developed for high-reliability voltage regulation and transient protection in cost-sensitive, space-constrained consumer and industrial electronics - emphasizing E24 compatibility, SC-59 manufacturability, and repeatable surge performance.

FAQ

What is the exact zener voltage range specified for RD13MW-T1B-A at 5 mA test current?

The RD13MW-T1B-A has a guaranteed zener voltage range of 12.47 V to 13.96 V when tested at 5 mA, per Renesas Data Sheet D10247EJ5V0DS00. This ±5% tolerance (Class B) ensures predictable clamping behavior in precision reference and protection circuits where voltage stability is critical. The RD13MW-T1B-A maintains this specification across its full operating temperature range.

Does RD13MW-T1B-A support bidirectional transient suppression, and how is that implemented electrically?

Yes, RD13MW-T1B-A supports bidirectional transient suppression using its unique three-terminal SC-59 structure: Pins 1 (K1) and 2 (K2) serve as independent cathodes, while Pin 3 (A) is the common anode. When placed between a signal line and ground, voltage excursions in either polarity forward-bias one cathode–anode path, enabling symmetrical clamping without external components. This architecture is confirmed in the official marking diagram and electrical characteristics table for RD13MW-T1B-A.

What is the maximum allowable peak reverse power for RD13MW-T1B-A, and under what pulse conditions is it rated?

RD13MW-T1B-A is rated for a peak reverse power (P_RSM) of 85 W at a pulse width of 10 µs, as specified in the "Maximum Ratings" section of Renesas Data Sheet D10247EJ5V0DS00. This rating applies under TA = 25°C and defines the device's capability to absorb short-duration energy transients - essential for IEC 61000-4-4 EFT and lightning-surge immunity in industrial interfaces. RD13MW-T1B-A's thermal impedance profile supports safe dissipation of this energy without junction failure.

Can RD13MW-T1B-A be used as a precision voltage reference in analog circuits, and what limits its accuracy?

RD13MW-T1B-A can serve as a moderate-accuracy voltage reference in non-critical analog circuits, with typical zener voltage of 13.14–14.83 V (including forward voltage contribution) and temperature coefficient of ±0.04%/°C near 13 V. However, its accuracy is limited by ±5% initial tolerance, 35 Ω dynamic impedance causing load-dependent drift, and absence of trimming or compensation - making it unsuitable for high-precision ADC references but viable for reset supervisors or comparator thresholds where ±100 mV error is acceptable. RD13MW-T1B-A's design prioritizes robustness over metrological precision.

Is RD13MW-T1B-A compliant with RoHS and lead-free soldering requirements?

Yes, RD13MW-T1B-A complies with EU RoHS Directive 2011/65/EU and is compatible with lead-free reflow soldering processes. Renesas Electronics confirms environmental compliance in its general product notices and data sheet footers, and the SC-59 package construction uses matte tin plating on copper leads. No exemptions apply, and the device contains no restricted substances above threshold limits. RD13MW-T1B-A's RoHS status is maintained across all production lots and is traceable through Renesas' material declarations.