CSDD-16M BK Equivalent & Substitute Parts

Part Overview

The CSDD-16M BK is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 600V off-state voltage and 16A RMS on-state current in a surface mount D2PAK package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, gate trigger characteristics, and thermal operating range while accommodating the same or compatible package footprint.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	600	V
Current - On State (It (RMS)) (Max)	16	A
Voltage - Gate Trigger (Vgt) (Max)	1.5	V
Current - Gate Trigger (Igt) (Max)	15	mA
Voltage - On State (Vtm) (Max)	1.6	V
Current - Hold (Ih) (Max)	20	mA
Operating Temperature Range	-40 to 125	°C (TJ)
Package / Case	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	-

Substitute Part Grouping Explanation

Substitution of the CSDD-16M BK is based on the following critical electrical and mechanical parameters:

Voltage Rating (Off-State): Substitute must be rated for minimum 600V off-state voltage
Current Rating (RMS): Substitute must support minimum 16A RMS on-state current
Gate Trigger Voltage (Vgt): Substitute gate trigger voltage must not exceed 1.5V maximum
Gate Trigger Current (Igt): Substitute gate trigger current must not exceed 15mA maximum
On-State Voltage (Vtm): Substitute on-state voltage must not exceed 1.6V maximum
Hold Current (Ih): Substitute hold current must not exceed 20mA maximum
Operating Temperature: Substitute must support -40°C to 125°C junction temperature range
Package Compatibility: Substitute must use TO-263-3 (D2PAK) surface mount package

The Q6016NH3TP from Littelfuse Inc. qualifies as a functional substitute based on these parameters, though it is a TRIAC (bidirectional thyristor) rather than an SCR (unidirectional thyristor). This distinction affects application suitability and must be evaluated against circuit requirements.

Parameter Comparison

Parameter	CSDD-16M BK (Main Part)	Q6016NH3TP (Substitute)	Match Status
Voltage - Off State	600 V	600 V	Equivalent
Current - On State (It (RMS)) (Max)	16 A	16 A	Equivalent
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.3 V	Substitute Superior
Current - Gate Trigger (Igt) (Max)	15 mA	20 mA	Substitute Exceeds
Voltage - On State (Vtm) (Max)	1.6 V	Not Specified	Data Not Available
Current - Hold (Ih) (Max)	20 mA	35 mA	Substitute Exceeds
Operating Temperature Range	-40 to 125 °C (TJ)	-40 to 125 °C (TJ)	Equivalent
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Device Type	SCR (Sensitive Gate)	TRIAC (Alternistor - Snubberless)	Different Topology
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The Q6016NH3TP is available as an active product from Littelfuse Inc., addressing the obsolescence status of the CSDD-16M BK. Both components share identical voltage and current ratings, matching package footprint, and compatible operating temperature range.

The Q6016NH3TP exceeds the gate trigger current specification (20mA vs. 15mA maximum) and hold current specification (35mA vs. 20mA maximum). The substitute demonstrates superior gate trigger voltage performance (1.3V vs. 1.5V maximum).

The fundamental difference between these components is device topology: the CSDD-16M BK is an SCR (unidirectional thyristor), while the Q6016NH3TP is a TRIAC (bidirectional thyristor). This distinction determines current flow direction capability and affects circuit behavior in AC and DC applications. Selection must be validated against specific application requirements.

The Q6016NH3TP carries RoHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements. Both components share identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications.

Frequently Asked Questions (FAQ)

Q: Can the Q6016NH3TP directly replace the CSDD-16M BK in all applications?

A: Direct replacement depends on circuit topology requirements. Both components share identical voltage (600V), current (16A RMS), package (TO-263-3 D2PAK), and temperature range (-40 to 125°C). However, the CSDD-16M BK is an SCR (unidirectional) while the Q6016NH3TP is a TRIAC (bidirectional). Applications requiring unidirectional current flow may not function correctly with a TRIAC substitute. Circuit validation is required.

Q: What is the significance of the gate trigger current difference (15mA vs. 20mA)?

A: The Q6016NH3TP gate trigger current specification (20mA maximum) exceeds the CSDD-16M BK specification (15mA maximum). This means the substitute may require slightly higher gate current to trigger. Gate drive circuits must be verified to ensure adequate current supply at the specified voltage levels.

Q: Why does the Q6016NH3TP have a higher hold current (35mA vs. 20mA)?

A: The hold current specification indicates the minimum current required to maintain device conduction after gate signal removal. The Q6016NH3TP's higher hold current (35mA) means the load circuit must supply more current to sustain conduction. This affects circuit design and load impedance calculations.

Q: Are the packages truly compatible?

A: Both components use TO-263-3 (D2PAK) surface mount packages with identical pin configurations (2 leads + tab). PCB footprints are compatible. Thermal performance and solder reflow profiles should be verified with component datasheets.

Q: What compliance certifications apply to the Q6016NH3TP?

A: The Q6016NH3TP is RoHS3 compliant and REACH Unaffected. Both components share EAR99 export classification and 8541.30.0080 HTSUS code. Regulatory requirements for your application should be confirmed against these certifications.

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