CD214C-T30CALF Equivalent & Substitute Parts

Part Overview

The CD214C-T30CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 30V reverse standoff voltage with a 48.4V maximum clamping voltage and 31A peak pulse current capability in the DO-214AB (SMC) package format. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214C-T30CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	48.4V
Current - Peak Pulse (10/1000µs)	31A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CD214C-T30CALF is determined by strict electrical and mechanical parameter matching within the TVS diode category. The critical parameters that define substitutability are:

Primary Matching Criteria:

Voltage - Reverse Standoff: 30V (±tolerance)
Voltage - Breakdown (Min): 33.3V
Voltage - Clamping (Max) @ Ipp: 48.4V
Current - Peak Pulse (10/1000µs): 31A minimum
Power - Peak Pulse: 1500W minimum
Package / Case: DO-214AB (SMC)
Mounting Type: Surface Mount
Bidirectional Channels: 1

Substitute parts are categorized into two groups:

Direct Substitutes maintain identical electrical specifications (30V standoff, 48.4V clamp, 31A peak pulse, 1500W power rating) and are pin-compatible in DO-214AB packaging.

Similar Substitutes share the same voltage ratings and package but differ in peak pulse current (higher ratings: 62A, 103A, 156A) or clamping voltage characteristics. These parts provide enhanced performance margins and are electrically compatible for applications where higher transient energy absorption is acceptable.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Operating Temperature	Product Status
CD214C-T30CALF	Bourns Inc.	30V	33.3V	48.4V	31A	1500W	DO-214AB (SMC)	-55°C ~ 150°C	Obsolete
SMCJ30CA	MDD	30V	33.3V	48.4V	31A	1500W	DO-214AB (SMC)	-50°C ~ 150°C	Active
SMCJ30CA-HR	Littelfuse Inc.	30V	33.3V	48.4V	31A	1500W	DO-214AB (SMC)	-65°C ~ 150°C	Active
SMCJ30CA-TP	Micro Commercial Co	30V	33.3V	48.4V	31A	1500W	DO-214AB (SMC)	-55°C ~ 175°C	Active
SMCJ30CA-TR	STMicroelectronics	30V	33.3V	64.3V	156A (8/20µs)	1500W	DO-214AB (SMC)	-55°C ~ 150°C	Active
SMDJ30CA	Alpha & Omega Semiconductor Inc.	30V	33.3V	48.4V	62A	3000W	DO-214AB (SMC)	-55°C ~ 150°C	Active
SMDJ30CA-T7	Littelfuse Inc.	30V	33.3V	48.4V	62A	3000W	DO-214AB (SMC)	-65°C ~ 150°C	Active
5.0SMDJ30CA	MDE Semiconductor Inc	30V	33.3V	48.4V	103A	5000W	DO-214AB (SMC)	-55°C ~ 150°C	Active
5.0SMDJ30CA-T7	Littelfuse Inc.	30V	33.3V	48.4V	103A	5000W	DO-214AB (SMC)	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

SMCJ30CA (MDD), SMCJ30CA-HR (Littelfuse Inc.), and SMCJ30CA-TP (Micro Commercial Co) are direct functional equivalents with matching 30V standoff, 48.4V clamping, and 31A peak pulse specifications. All three are active products with ROHS3 compliance and MSL 1 rating. Selection among these should prioritize product availability and supply chain continuity. SMCJ30CA-TP offers the widest operating temperature range (-55°C ~ 175°C), providing additional thermal margin for demanding applications.

Enhanced Performance Substitutes (Higher Current/Power Ratings):

SMDJ30CA (Alpha & Omega Semiconductor Inc.) and SMDJ30CA-T7 (Littelfuse Inc.) maintain identical voltage specifications but provide doubled peak pulse current (62A) and power dissipation (3000W). These parts are suitable for applications requiring greater transient energy absorption while maintaining the same protection voltage thresholds.

5.0SMDJ30CA (MDE Semiconductor Inc.) and 5.0SMDJ30CA-T7 (Littelfuse Inc.) offer the highest performance tier with 103A peak pulse current and 5000W power rating, appropriate for high-energy transient environments.

Voltage Clamping Variant:

SMCJ30CA-TR (STMicroelectronics) maintains the 30V standoff voltage but exhibits a higher clamping voltage of 64.3V with significantly elevated peak pulse current (156A at 8/20µs). This part is suitable only when the higher clamping voltage is acceptable for the protected circuit.

All recommended substitutes are active products with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory compliance and manufacturing compatibility with modern assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SMCJ30CA directly replace CD214C-T30CALF without circuit modification?

A: Yes. SMCJ30CA matches all critical electrical parameters: 30V reverse standoff, 33.3V breakdown minimum, 48.4V clamping maximum, and 31A peak pulse current. Both use DO-214AB (SMC) packaging with identical pinout. No circuit changes are required.

Q: What is the difference between direct substitutes and enhanced performance substitutes?

A: Direct substitutes (SMCJ30CA series) maintain identical 31A peak pulse and 1500W power ratings. Enhanced substitutes (SMDJ30CA, 5.0SMDJ30CA series) provide higher current handling (62A or 103A) and power dissipation (3000W or 5000W) while preserving the same voltage protection thresholds. Enhanced substitutes are backward compatible but provide additional transient energy absorption capability.

Q: Is SMCJ30CA-TR compatible with the original CD214C-T30CALF?

A: SMCJ30CA-TR shares the same 30V standoff voltage and DO-214AB package but differs in clamping voltage (64.3V vs. 48.4V) and peak pulse current specification (156A at 8/20µs vs. 31A at 10/1000µs). This part is electrically compatible but provides different transient response characteristics. Use only if the higher clamping voltage is acceptable for your protected circuit.

Q: What packaging format do all substitute parts use?

A: All substitute parts listed use DO-214AB (SMC) surface mount packaging, identical to the original CD214C-T30CALF. This ensures mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification and MSL 1 (unlimited) moisture sensitivity rating, meeting current regulatory requirements and manufacturing standards.

Q: Which substitute offers the widest operating temperature range?

A: SMCJ30CA-TP (Micro Commercial Co) operates from -55°C to 175°C, providing the widest temperature margin compared to other direct substitutes rated to -55°C ~ 150°C or -50°C ~ 150°C.

Q: Can I use a higher-current substitute like SMDJ30CA-T7 in place of CD214C-T30CALF?

A: Yes. SMDJ30CA-T7 maintains identical voltage specifications (30V standoff, 48.4V clamping) with enhanced current handling (62A vs. 31A). The higher current rating provides additional protection margin without affecting the voltage protection threshold. This substitution is electrically valid and improves transient suppression capability.

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