CD214C-T170CALF Equivalent & Substitute Parts

Part Overview

The CD214C-T170CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., classified as a Zener-type bidirectional TVS in the DO-214AB (SMC) surface mount package. This component is rated for 170V reverse standoff voltage with a 275V maximum clamping voltage and 5.5A peak pulse current, designed for general-purpose transient voltage protection applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214C-T170CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Package / Case	DO-214AB, SMC
Voltage - Reverse Standoff (Typ)	170V
Voltage - Breakdown (Min)	189V
Voltage - Clamping (Max) @ Ipp	275V
Current - Peak Pulse (10/1000µs)	5.5A
Power - Peak Pulse	1500W (1.5kW)
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CD214C-T170CALF is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 170V
Voltage - Clamping (Max) @ Ipp: 275V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Type: Zener, Bidirectional

Substitution Categories:

Direct Equivalents maintain identical electrical specifications including 5.5A peak pulse current and 1500W peak pulse power. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Substitutes maintain the same voltage ratings and package but feature higher peak pulse current (18.2A) and peak pulse power (5kW). These parts provide enhanced transient protection capability and are backward-compatible for the CD214C-T170CALF application, as higher current ratings do not compromise circuit operation.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
CD214C-T170CALF	Bourns Inc.	170V	275V	5.5A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMCJ170CA	Fairchild Semiconductor	170V	275V	5.5A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMCJ170CA-HR	Littelfuse	170V	275V	5.5A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ170CA-HRA	Littelfuse	170V	275V	5.5A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ170CA-HRAT7	Littelfuse Inc.	170V	275V	5.5A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ170CA-M3/57T	Vishay General Semiconductor - Diodes Division	170V	275V	5.5A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
5.0SMDJ170CA	MDE Semiconductor Inc	170V	275V	18.2A	5000W	DO-214AB, SMC	-55°C ~ 150°C	Active
5.0SMDJ170CA-T7	Littelfuse	170V	275V	18.2A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active
5.0SMLJ170CA-TP	Micro Commercial Co	170V	275V	18.2A	5000W	DO-214AB, SMC	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Direct Equivalent Selection (Preferred for Obsolete Part Replacement):

SMCJ170CA from Fairchild Semiconductor is the primary direct equivalent, offering identical electrical specifications and active product status. This part maintains 5.5A peak pulse current and 1500W peak pulse power, ensuring drop-in compatibility without circuit redesign.

SMCJ170CA-HR, SMCJ170CA-HRA, and SMCJ170CA-HRAT7 from Littelfuse provide direct electrical equivalence with extended lower operating temperature range (-65°C minimum versus -55°C), suitable for applications requiring enhanced cold-temperature performance. All three variants maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

SMCJ170CA-M3/57T from Vishay General Semiconductor (TransZorb® series) offers direct electrical equivalence with ROHS3 compliance and active product status.

Enhanced Protection Alternative (Higher Current Rating):

5.0SMDJ170CA from MDE Semiconductor Inc, 5.0SMDJ170CA-T7 from Littelfuse, and 5.0SMLJ170CA-TP from Micro Commercial Co maintain identical voltage ratings (170V reverse standoff, 275V clamping) and package specifications while providing 18.2A peak pulse current and 5kW peak pulse power. These parts are backward-compatible substitutes that enhance transient protection capability. Selection among these variants depends on operating temperature requirements and supply chain availability.

All recommended substitutes maintain ROHS3 compliance and are actively manufactured, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher peak pulse current (18.2A) in place of the original 5.5A rated part?

A: Yes. Higher peak pulse current ratings are backward-compatible. The 5.0SMDJ170CA, 5.0SMDJ170CA-T7, and 5.0SMLJ170CA-TP parts provide enhanced transient suppression capability while maintaining the same voltage protection thresholds. Circuit operation is not compromised by this upgrade.

Q: Are all substitute parts in the same DO-214AB (SMC) package?

A: Yes. All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical and electrical compatibility with the original CD214C-T170CALF footprint.

Q: What is the difference between SMCJ170CA variants (HR, HRA, HRAT7)?

A: These are Littelfuse product line variants within the SMCJ-HR and SMCJ-HRA series. All maintain identical electrical specifications (170V standoff, 275V clamping, 5.5A peak pulse). The HRAT7 designation indicates a specific tape and reel packaging configuration. Selection depends on supply availability and packaging requirements.

Q: Do substitute parts maintain RoHS3 compliance?

A: Yes. All recommended substitute parts are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original CD214C-T170CALF.

Q: Which substitute offers the widest operating temperature range?

A: The 5.0SMLJ170CA-TP from Micro Commercial Co provides the widest operating temperature range (-55°C to 175°C), compared to the original part's -55°C to 150°C specification.

Q: Can I mix different substitute part manufacturers in the same circuit board?

A: Yes. All substitute parts meet identical electrical specifications for the 170V/275V protection class. Mixing manufacturers is acceptable from an electrical standpoint, though design documentation should reflect the specific part numbers used.

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