CD214A-T64ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T64ALF 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 a 64V reverse standoff voltage with 103V maximum clamping voltage and 3.9A peak pulse current capability in a DO-214AC (SMA) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	64V	V
Voltage - Breakdown (Min)	71.1V	V
Voltage - Clamping (Max) @ Ipp	103V	V
Current - Peak Pulse (10/1000µs)	3.9A	A
Power - Peak Pulse	400W	W
Operating Temperature Range	-55°C ~ 150°C	°C
Package / Case	DO-214AC (SMA)	—
Type	Zener	—
Unidirectional Channels	1	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the CD214A-T64ALF is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 64V ± tolerance
Voltage - Clamping (Max) @ Ipp: 103V
Current - Peak Pulse (10/1000µs): ≥ 3.9A
Power - Peak Pulse: 400W
Package / Case: DO-214AC (SMA)
Type: Zener, Unidirectional
Operating Temperature: -55°C minimum to 150°C minimum

Direct Equivalents maintain all electrical parameters within specification limits and are pin-compatible replacements.

Similar Parts exhibit variations in one or more electrical parameters (standoff voltage ±1V, clamping voltage ±10V, peak current ±0.2A, or operating temperature range extension) while maintaining functional compatibility for general-purpose protection applications. These parts are suitable for substitution when the application tolerates the specified parameter variance.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamping Voltage (V)	Peak Pulse Current (A)	Operating Temp (°C)	Product Status	RoHS Status
CD214A-T64ALF	Bourns Inc.	64	71.1	103	3.9	-55 ~ 150	Obsolete	ROHS3 Compliant
SMAJ64A	Meritek	64	71.1	103	3.88	-55 ~ 150	Active	ROHS3 Compliant
P4SMA75A	Eaton - Electronics Division	64.1	71.3	103	4	-55 ~ 150	Active	RoHS Compliant
SMAJ64A-TP	Micro Commercial Co	64	71.1	103	3.9	-55 ~ 175	Active	ROHS3 Compliant
SMAJ70A-M3/5A	Vishay General Semiconductor - Diodes Division	70	77.8	113	4.6	-55 ~ 150	Active	ROHS3 Compliant
SMAJ75A-M3/61	Vishay General Semiconductor - Diodes Division	75	83.3	121	3.3	-55 ~ 150	Active	ROHS3 Compliant
SMAJP4KE82A-TP	Micro Commercial Co	70.1	77.9	113	3.6	-55 ~ 175	Active	Not specified
TV04A640J-G	Comchip Technology	64	71.1	103	3.88	-55 ~ 150	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Preferred for Obsolescence Resolution):

SMAJ64A (Meritek) and TV04A640J-G (Comchip Technology) are direct electrical equivalents with identical standoff voltage (64V), clamping voltage (103V), and operating temperature range (-55°C ~ 150°C). Both parts are in active production status with ROHS3 compliance, making them suitable for immediate substitution without circuit redesign. SMAJ64A offers higher inventory availability (122,500 pcs) compared to TV04A640J-G (960 pcs).

Extended Temperature Range Alternative:

SMAJ64A-TP (Micro Commercial Co) provides identical electrical parameters to the original part with an extended operating temperature range (-55°C ~ 175°C). This part is active and ROHS3 compliant, offering thermal margin for applications requiring higher ambient temperature tolerance.

Higher Voltage Alternatives (Application-Dependent):

SMAJ70A-M3/5A, SMAJ75A-M3/61, and SMAJP4KE82A-TP exhibit higher standoff and clamping voltages. These parts are suitable only for applications where the circuit design permits higher voltage thresholds. Selection of these alternatives requires circuit-level validation to confirm compatibility with protected signal levels.

All recommended substitutes maintain DO-214AC (SMA) package compatibility, unidirectional Zener topology, and 400W peak pulse power rating. Product status verification confirms all active alternatives are currently available for procurement.

Frequently Asked Questions (FAQ)

Q: Can SMAJ64A directly replace CD214A-T64ALF without circuit modification?

A: Yes. SMAJ64A maintains identical electrical specifications: 64V standoff voltage, 103V clamping voltage, 3.9A peak pulse current, and -55°C ~ 150°C operating range. Both use DO-214AC (SMA) packaging. No circuit redesign is required.

Q: What is the difference between direct equivalents and similar parts?

A: Direct equivalents (SMAJ64A, TV04A640J-G) match all electrical parameters within specification. Similar parts (SMAJ70A-M3/5A, SMAJ75A-M3/61) vary in standoff voltage (±6V) and clamping voltage (±10-18V), requiring circuit validation before substitution.

Q: Why are SMAJ70A-M3/5A and SMAJ75A-M3/61 listed as alternatives if they have different voltage ratings?

A: These parts are included because they were referenced in the original CD214A-T64ALF substitute list. They function as TVS diodes in the same package but with higher voltage thresholds. Use only if your application circuit permits higher clamping voltages.

Q: Does SMAJ64A-TP offer any advantage over SMAJ64A?

A: SMAJ64A-TP extends the operating temperature range to -55°C ~ 175°C compared to SMAJ64A's -55°C ~ 150°C. Select SMAJ64A-TP for applications requiring higher thermal margin. Electrical performance is identical.

Q: Are all substitute parts RoHS compliant?

A: SMAJ64A, SMAJ64A-TP, SMAJ70A-M3/5A, SMAJ75A-M3/61, and TV04A640J-G are ROHS3 compliant. P4SMA75A is RoHS compliant. SMAJP4KE82A-TP does not specify RoHS status in available documentation.

Q: What packaging formats are available for these substitutes?

A: SMAJ64A, P4SMA75A, SMAJ64A-TP, SMAJ70A-M3/5A, SMAJ75A-M3/61, and TV04A640J-G are supplied in Tape & Reel (TR) format. SMAJP4KE82A-TP is supplied in Bulk packaging. Verify packaging requirements with your procurement specification.

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