CD214L-T11ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T11ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features an 11V reverse standoff voltage with an 18.2V maximum clamping voltage and 164.8A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214L-T11ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	11V
Voltage - Breakdown (Min)	12.2V
Voltage - Clamping (Max) @ Ipp	18.2V
Current - Peak Pulse (10/1000µs)	164.8A
Power - Peak Pulse	3000W (3kW)
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AB, SMC
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CD214L-T11ALF are classified into two functional groups based on electrical performance characteristics:

Group 1: Full Electrical Equivalents (3000W Peak Pulse Power) These parts maintain identical electrical specifications including 11V reverse standoff voltage, 18.2V clamping voltage, and 164.8A peak pulse current with 3000W peak pulse power. Parts in this group are direct functional replacements:

SMLJ11A (Bourns Inc., Active status)
SMDJ11A (Alpha & Omega Semiconductor Inc., Active status)
SMDJ11A-HR (Littelfuse Inc., Active status)
SMDJ11A-HRA (Littelfuse Inc., Active status)

Group 2: Reduced Performance Substitutes (1500W Peak Pulse Power) These parts share the same voltage specifications (11V reverse standoff, 18.2V clamping) but operate at reduced peak pulse current (82.5A) and peak pulse power (1500W). These are suitable for applications with lower transient energy requirements:

SMCJ11A (Fairchild Semiconductor, Active status)
SMCJ11A-HR (Littelfuse Inc., Active status)
SMCJ11A-HRA (Littelfuse Inc., Active status)
SMCJ11A-TP (Micro Commercial Co, Active status)

All substitute parts maintain the DO-214AB (SMC) surface mount package, unidirectional channel configuration, and general-purpose application classification of the original part.

Parameter Comparison

Part Number	Manufacturer	Status	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temp	Package
CD214L-T11ALF	Bourns Inc.	Obsolete	11V	18.2V	164.8A	3000W	-55°C ~ 150°C	DO-214AB
SMLJ11A	Bourns Inc.	Active	11V	18.2V	164.8A	3000W	-55°C ~ 150°C	DO-214AB
SMCJ11A	Fairchild Semiconductor	Active	11V	18.2V	82.5A	1500W	-55°C ~ 150°C	DO-214AB
SMCJ11A-HR	Littelfuse Inc.	Active	11V	18.2V	82.5A	1500W	-65°C ~ 150°C	DO-214AB
SMCJ11A-HRA	Littelfuse Inc.	Active	11V	18.2V	82.5A	1500W	-65°C ~ 150°C	DO-214AB
SMCJ11A-HRAT7	Littelfuse Inc.	Active	11V	18.2V	82.5A	1500W	-65°C ~ 150°C	DO-214AB
SMCJ11A-TP	Micro Commercial Co	Active	11V	18.2V	82.5A	1500W	-55°C ~ 175°C	DO-214AB
SMDJ11A	Alpha & Omega Semiconductor Inc.	Active	11V	18.2V	164.9A	3000W	-55°C ~ 150°C	DO-214AB
SMDJ11A-HR	Littelfuse Inc.	Active	11V	18.2V	164.8A	3000W	-65°C ~ 150°C	DO-214AB
SMDJ11A-HRA	Littelfuse Inc.	Active	11V	18.2V	164.8A	3000W	-65°C ~ 150°C	DO-214AB

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance)

Select SMLJ11A, SMDJ11A, SMDJ11A-HR, or SMDJ11A-HRA when the application requires the full 3000W peak pulse power and 164.8A peak pulse current of the original CD214L-T11ALF. All four parts are in active production status with ROHS3 compliance. SMLJ11A is manufactured by Bourns Inc., the original manufacturer, providing design continuity. SMDJ11A-HR and SMDJ11A-HRA offer extended lower operating temperature range (-65°C minimum) compared to the original specification (-55°C minimum).

For Reduced Power Applications

Select SMCJ11A, SMCJ11A-HR, SMCJ11A-HRA, or SMCJ11A-TP when the application can operate with 1500W peak pulse power and 82.5A peak pulse current while maintaining the same voltage protection thresholds (11V standoff, 18.2V clamping). These parts are suitable for lower transient energy environments. SMCJ11A-TP offers the widest operating temperature range (-55°C to 175°C), providing thermal flexibility for extended temperature applications.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can SMCJ11A series parts directly replace CD214L-T11ALF in all applications?

A: SMCJ11A series parts share identical voltage specifications (11V standoff, 18.2V clamping) but operate at half the peak pulse power (1500W vs. 3000W) and half the peak pulse current (82.5A vs. 164.8A). Substitution is valid only if the application's transient energy does not exceed 1500W peak pulse power. Review circuit transient analysis to confirm compatibility.

Q: What is the difference between SMDJ11A and SMCJ11A?

A: Both maintain the same voltage protection characteristics and DO-214AB package. The primary difference is peak pulse power rating: SMDJ11A operates at 3000W peak pulse power with 164.8A peak pulse current, while SMCJ11A operates at 1500W peak pulse power with 82.5A peak pulse current. Select based on application transient energy requirements.

Q: Are there temperature range differences between substitute parts?

A: Yes. The original CD214L-T11ALF and most substitutes operate from -55°C to 150°C. Littelfuse HR and HRA variants (SMCJ11A-HR, SMCJ11A-HRA, SMDJ11A-HR, SMDJ11A-HRA) extend the lower temperature limit to -65°C. SMCJ11A-TP extends the upper temperature limit to 175°C. Verify application temperature requirements before selection.

Q: Do all substitute parts use the same DO-214AB package?

A: Yes. All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical and thermal compatibility with the original CD214L-T11ALF footprint and assembly process.

Q: Which substitute offers the best availability?

A: SMLJ11A (Bourns Inc.) shows 15,100 pieces in stock, SMDJ11A (Alpha & Omega) shows 10,200 pieces, and SMCJ11A variants show inventory ranging from 849 to 12,200 pieces. Verify current inventory with your supplier for production requirements.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance of the original CD214L-T11ALF.

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