Equivalent & Substitute Parts for CDBT-70S-HF

Part Overview

The CDBT-70S-HF from Comchip Technology is a Schottky diode array arranged in a 1-pair series configuration, supporting a maximum reverse voltage of 70 V and an average rectified forward current of 70 mA per diode. This device is supplied in a surface mount SOT-23-3 (TO-236-3, SC-59) package and is compliant with ROHS3. The part is currently active, with inventory available. Engineering need for alternative models arises when supply constraints, procurement preferences, or certification requirements dictate direct parametric replacement with compatible electrical and mechanical characteristics.

Substiute Parts

CDBT-70S-HF

Comchip TechnologyIn Stock: 705CDBT-70S-HF Datasheet

Current PartRFQ

BAS70-04

Good-Ark SemiconductorIn Stock: 365455BAS70-04 Datasheet

Parametric EquivalentRFQ

BAS70-04

Good-Ark SemiconductorIn Stock: 365455BAS70-04 Datasheet

Parametric EquivalentRFQ

BAS70-04HE3-TP

Micro Commercial CoIn Stock: 7098BAS70-04HE3-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is limited strictly to diode components fulfilling all of the following conditions: identical diode configuration (1 Pair Series Connection), comparable Schottky technology, equal or greater maximum reverse voltage (70 V), matching average forward current (70 mA per diode), equivalent forward voltage drop (1 V @ 15 mA), reverse recovery time (5 ns), reverse leakage current not exceeding the original rating, operating temperature meeting or exceeding the original part's range, and mechanical equivalency for mounting type and package/case (SOT-23-3, TO-236-3, SC-59). Substitute parts listed below meet these explicit criteria.

Parameter Comparison

Engineering Selection Recommendations

CDBT-70S-HF, BAS70-04, and BAS70-04HE3-TP are active, ROHS3 compliant products supporting surface mount assembly and the SOT-23-3 (TO-236-3, SC-59) package. The substitute BAS70-04 and BAS70-04HE3-TP have operating junction temperature that extends below the main part’s minimum, providing compatibility within the specified ranges. BAS70-04HE3-TP is Automotive qualified (AEC-Q101) as indicated; this may satisfy procurement requirements for automotive-grade applications. Moisture Sensitivity Level (MSL 1) is unlimited for all, which supports standard soldering processes. Only parametric and compliance-certified equivalents are listed.

Frequently Asked Questions (FAQ)

Q1: Which key parameters determine if a diode is a direct substitute for CDBT-70S-HF?
A1: Only diodes featuring identical series connection configuration, Schottky technology, 70 V DC reverse voltage, 70 mA average rectified current per diode, 1 V forward voltage at 15 mA, 5 ns reverse recovery time, comparable reverse leakage current, operating within specified junction temperatures, and physical packaging (TO-236-3, SC-59, SOT-23-3) qualify.

Q2: Is there any difference in mounting or soldering process among CDBT-70S-HF and its listed alternatives?
A2: No. All parts use surface mount, SOT-23-3 (including TO-236-3, SC-59) package and are compatible with standard SMT processes.

Q3: Can BAS70-04HE3-TP be used in automotive applications?
A3: Yes. BAS70-04HE3-TP has AEC-Q101 Automotive qualification as specified.

Q4: Are there any differences in junction operating temperature range among substitutes?
A4: BAS70-04 and BAS70-04HE3-TP support an operating junction temperature of -55°C ~ 125°C, whereas CDBT-70S-HF has -40°C ~ 125°C. For temperatures below -40°C, only the substitutes meet specification.

Q5: How does reverse leakage current compare between main and substitute parts?
A5: BAS70-04 matches the CDBT-70S-HF reverse leakage rating of 100 nA @ 50 V. BAS70-04HE3-TP is specified at 200 nA @ 70 V. Refer to explicit parameter values for design acceptance.

Q6: Are all substitute parts ROHS3 compliant?
A6: Yes. All listed alternatives are ROHS3 compliant as stated in the input parameters.