CD214A-T6.5ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T6.5ALF 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 6.5V reverse standoff voltage, 11.2V maximum clamping voltage, and 35.7A peak pulse current capability in a DO-214AC (SMA) package. The part is classified as obsolete, necessitating identification of active equivalent and substitute components to maintain design continuity and ensure supply chain availability.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	6.5	V
Voltage - Breakdown (Min)	7.22	V
Voltage - Clamping (Max) @ Ipp	11.2	V
Current - Peak Pulse (10/1000µs)	35.7	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the CD214A-T6.5ALF is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Equivalence Criteria:

Voltage - Reverse Standoff (Typ): 6.5V
Voltage - Clamping (Max) @ Ipp: 11.2V
Current - Peak Pulse (10/1000µs): 35.7A
Power - Peak Pulse: 400W
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Type: Zener, Unidirectional (1 channel)

Direct Equivalent: SMAJ6.5A (MDD) meets all primary equivalence criteria with identical electrical specifications and active product status.

Similar Substitutes: Parts listed below share the same reverse standoff voltage (6.5V), package format (DO-214AC/SMA), and mounting type but exhibit variations in clamping voltage, peak pulse current, or power dissipation. These parts are suitable for applications where the specified electrical parameters can accommodate the documented variations.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Product Status	RoHS Status
CD214A-T6.5ALF	Bourns Inc.	6.5	11.2	35.7	400	-55 to 150	Obsolete	ROHS3 Compliant
SMAJ6.5A	MDD	6.5	11.2	35.7	400	-50 to 150	Active	ROHS3 Compliant
SMAJ6.5A-TP	Micro Commercial Co	6.5	11.2	35.7	400	-55 to 175	Active	ROHS3 Compliant
TV04A6V5J-G	Comchip Technology	6.5	11.2	35.71	400	-55 to 150	Active	ROHS3 Compliant
SMA6J6.5A-TR	STMicroelectronics	6.5	14.5	276 (8/20µs)	600	-55 to 175	Active	ROHS3 Compliant
SMAJ6.5A-TR	STMicroelectronics	6.5	14.5	160 (8/20µs)	400	-55 to 150	Active	ROHS3 Compliant
SM4T7V6AY	STMicroelectronics	6.5	14.5	160 (8/20µs)	400	-55 to 150	Active	ROHS3 Compliant
SMA6J6.0A-TP	Micro Commercial Co	6.0	10.3	58.3	600	-55 to 175	Active	—
SMAJP4KE6.8A-TP	Micro Commercial Co	5.8	10.5	39	400	-55 to 175	Active	—
SMAJP4KE8.2A-TP	Micro Commercial Co	7.0	12.1	33.9	400	-55 to 175	Active	—

Engineering Selection Recommendations

Direct Replacement (Preferred): SMAJ6.5A (MDD) is the primary equivalent for CD214A-T6.5ALF. This part maintains identical electrical specifications (6.5V standoff, 11.2V clamping, 35.7A peak pulse, 400W power) and is actively manufactured. The operating temperature range is -50°C to 150°C, which is narrower at the lower bound than the original (-55°C to 150°C) but sufficient for most general-purpose applications. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the original specification.

Secondary Equivalents (Full Electrical Match): SMAJ6.5A-TP (Micro Commercial Co) and TV04A6V5J-G (Comchip Technology) provide complete electrical equivalence with identical clamping voltage, peak pulse current, and power dissipation. Both are actively produced and ROHS3 compliant. SMAJ6.5A-TP extends the operating temperature range to -55°C to 175°C, providing enhanced thermal margin.

Higher Performance Alternatives: SMA6J6.5A-TR and SMAJ6.5A-TR (STMicroelectronics) offer increased clamping voltage (14.5V) and higher peak pulse current capability (160A to 276A depending on pulse waveform). These parts are suitable for applications requiring enhanced transient suppression performance while maintaining the 6.5V reverse standoff voltage. Both are ROHS3 compliant and actively manufactured.

Lower Voltage Alternatives: SMA6J6.0A-TP (6.0V standoff, 10.3V clamping) and SMAJP4KE6.8A-TP (5.8V standoff, 10.5V clamping) are suitable only for applications where the lower reverse standoff voltage is acceptable. These parts offer higher peak pulse current (58.3A and 39A respectively) and extended temperature ranges.

Compliance Considerations: All recommended direct and secondary equivalent parts maintain ROHS3 compliance and are actively produced. The original CD214A-T6.5ALF is classified as obsolete; selection of an active equivalent ensures long-term supply chain stability and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can SMAJ6.5A-TR or SMA6J6.5A-TR be used as direct replacements for CD214A-T6.5ALF?

A: These STMicroelectronics parts share the same 6.5V reverse standoff voltage and DO-214AC (SMA) package but differ in clamping voltage (14.5V vs. 11.2V) and peak pulse current specifications. They are suitable substitutes only if the circuit design can accommodate the higher clamping voltage and increased current handling capability. The higher performance characteristics do not create compatibility issues in most general-purpose protection applications.

Q: What is the difference between the 10/1000µs and 8/20µs pulse waveform specifications?

A: The pulse waveform notation indicates the test conditions for peak pulse current measurement. 10/1000µs represents a 10µs rise time and 1000µs pulse width, while 8/20µs represents an 8µs rise time and 20µs pulse width. These are standardized test waveforms; parts specified with different waveforms may exhibit different peak current ratings under identical transient conditions. Verify that the selected substitute's pulse waveform aligns with the circuit's expected transient profile.

Q: Is the narrower operating temperature range of SMAJ6.5A (-50°C to 150°C) acceptable compared to CD214A-T6.5ALF (-55°C to 150°C)?

A: The SMAJ6.5A operating range is suitable for applications where the minimum ambient temperature does not fall below -50°C. If the circuit operates at temperatures below -50°C, select SMAJ6.5A-TP or TV04A6V5J-G, both of which maintain the full -55°C lower limit.

Q: Are all substitute parts available in the same packaging options as the original?

A: All listed substitutes are available in DO-214AC (SMA) surface-mount package format, matching the original CD214A-T6.5ALF. Packaging variants (Tape & Reel, Bulk, Cut Tape) differ by supplier; confirm packaging availability with the selected manufacturer or distributor.

Q: What is the significance of ROHS3 compliance for this component?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All recommended direct and secondary equivalent parts are ROHS3 compliant, ensuring compatibility with modern manufacturing and environmental standards.

Q: Can lower voltage alternatives like SMA6J6.0A-TP be used if the application requires 6.5V standoff protection?

A: No. The reverse standoff voltage determines the threshold at which the TVS diode begins conducting. Using a part with 6.0V standoff in a circuit designed for 6.5V standoff will cause premature conduction and may result in circuit malfunction or component damage. Select only parts with matching or higher reverse standoff voltage specifications.

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