CD214B-T36ALF Equivalent & Substitute Parts

Part Overview

The CD214B-T36ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc. in the DO-214AA (SMB) surface mount package. This component is rated for 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 10.3A peak pulse current, designed for general-purpose transient voltage suppression 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	CD214B-T36ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	40V
Voltage - Clamping (Max) @ Ipp	58.1V
Current - Peak Pulse (10/1000µs)	10.3A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CD214B-T36ALF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 36V
Voltage - Clamping (Max) @ Ipp: 58.1V
Current - Peak Pulse (10/1000µs): 10.3A ± tolerance
Package / Case: DO-214AA, SMB (surface mount)
Type: Zener, Unidirectional (1 channel)
Power - Peak Pulse: 600W

Substitute Classification:

Direct Equivalents meet all primary criteria with identical or functionally equivalent electrical specifications and the same package type. These parts are pin-compatible and electrically interchangeable without circuit modification.

Similar Parts share the same voltage class (36V standoff), clamping voltage range (58.1V ± tolerance), and package type but may have minor variations in peak pulse current or operating temperature range. These parts are suitable for applications where the specified electrical parameters fall within acceptable tolerance bands.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Package / Case	Operating Temperature	Product Status
CD214B-T36ALF	Bourns Inc.	36V	58.1V	10.3A	DO-214AA, SMB	-55°C ~ 150°C	Obsolete
SMBJ36A	EVVO Semi	36V	58.1V	10.4A	DO-214AC, SMA	-65°C ~ 150°C	Active
SM6T42AY	STMicroelectronics	36V	76V	52A (8/20µs)	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ33A-HRA	Littelfuse	33V	53.3V	11.3A	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ36A-HRA	Littelfuse Inc.	36V	58.1V	10.4A	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ36A-M3/52	Vishay General Semiconductor - Diodes Division	36V	58.1V	10.3A	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ36A-TP	Micro Commercial Co	36V	58.1V	10.3A	DO-214AA, SMB	-55°C ~ 175°C	Active
SZ1SMB36AT3G	Littelfuse Inc.	36V	58.1V	10.3A	DO-214AA, SMB	-65°C ~ 150°C	Active
TPSMB43A	Littelfuse Inc.	36.8V	59.3V	10.3A	DO-214AA, SMB	-65°C ~ 175°C	Active

Engineering Selection Recommendations

Preferred Direct Equivalents:

SMBJ36A-M3/52 (Vishay) and SMBJ36A-TP (Micro Commercial Co) are the closest functional equivalents to the CD214B-T36ALF. Both maintain identical reverse standoff voltage (36V), clamping voltage (58.1V), and peak pulse current (10.3A) specifications with the same DO-214AA SMB package. Both parts are ROHS3 compliant and carry unlimited moisture sensitivity rating. SMBJ36A-TP offers extended operating temperature range to 175°C, providing additional thermal margin for high-temperature applications.

SZ1SMB36AT3G (Littelfuse Inc.) provides equivalent electrical performance with automotive-grade qualification (AEC-Q101) and extended temperature range (-65°C to 150°C), suitable for automotive and industrial applications requiring higher reliability standards.

Alternative Equivalents:

SMBJ36A-HRA (Littelfuse Inc.) matches all critical electrical parameters with identical 36V standoff and 58.1V clamping voltage. This part is available in higher inventory quantities and carries active product status with extended temperature range (-65°C to 150°C).

Package Consideration:

SMBJ36A (EVVO Semi) provides electrical equivalence but uses DO-214AC (SMA) package instead of DO-214AA (SMB). This package variant requires PCB layout modification and is not pin-compatible without redesign.

Similar Parts for Voltage-Tolerant Applications:

SM6T42AY (STMicroelectronics) maintains the 36V standoff voltage but features higher clamping voltage (76V) and significantly higher peak pulse current (52A at 8/20µs). This part is suitable only for applications where higher clamping voltage and current capacity are acceptable or beneficial.

TPSMB43A (Littelfuse Inc.) offers marginally higher standoff voltage (36.8V) and clamping voltage (59.3V) with extended temperature range to 175°C. This part is suitable for applications with slight voltage tolerance margins.

SMBJ33A-HRA (Littelfuse) operates at lower voltage class (33V standoff, 53.3V clamping) and is not suitable as a direct substitute without circuit re-evaluation.

Frequently Asked Questions (FAQ)

Q: Can SMBJ36A (EVVO Semi) be used as a direct replacement for CD214B-T36ALF?

A: SMBJ36A provides electrical equivalence but uses DO-214AC (SMA) package instead of DO-214AA (SMB). While electrically compatible, the different package requires PCB layout modification. For direct board-level compatibility without redesign, use SMBJ36A-M3/52, SMBJ36A-TP, or SMBJ36A-HRA instead.

Q: What is the difference between DO-214AA (SMB) and DO-214AC (SMA) packages?

A: Both are surface mount packages for TVS diodes, but they have different physical dimensions and pin configurations. DO-214AA (SMB) is the original package for the CD214B-T36ALF. DO-214AC (SMA) is a smaller variant. Substitution between these packages requires PCB redesign.

Q: Is SM6T42AY a suitable replacement for CD214B-T36ALF?

A: SM6T42AY maintains the 36V standoff voltage but has significantly different clamping characteristics (76V vs. 58.1V) and much higher peak pulse current (52A vs. 10.3A). This part is suitable only for applications where higher clamping voltage and current capacity are acceptable or required.

Q: Which substitute part offers the best automotive qualification?

A: SZ1SMB36AT3G (Littelfuse Inc.) and TPSMB43A (Littelfuse Inc.) both carry AEC-Q101 automotive qualification. SZ1SMB36AT3G maintains exact electrical equivalence to the original part, while TPSMB43A has slightly higher voltage ratings.

Q: What is the operating temperature range difference between substitutes?

A: The original CD214B-T36ALF operates from -55°C to 150°C. Most active substitutes extend the lower temperature limit to -65°C. SMBJ36A-TP and TPSMB43A extend the upper limit to 175°C, providing additional thermal margin for high-temperature environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the original part's environmental compliance status.

Q: Can SMBJ36A-HRA be used interchangeably with SMBJ36A-M3/52?

A: Yes, both parts maintain identical electrical specifications (36V standoff, 58.1V clamping, 10.3A peak pulse current) and the same DO-214AA SMB package. The primary difference is manufacturer (Littelfuse vs. Vishay) and operating temperature range (-65°C to 150°C vs. -55°C to 150°C). Selection depends on temperature requirements and supplier availability.

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