CD214A-T10ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T10ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., housed in a DO-214AC (SMA) surface mount package. This component is rated for 10V reverse standoff voltage with a 17V maximum clamping voltage and 24.6A peak pulse current. 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	CD214A-T10ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	10V
Voltage - Breakdown (Min)	11.1V
Voltage - Clamping (Max) @ Ipp	17V
Current - Peak Pulse (10/1000µs)	24.6A
Power - Peak Pulse	400W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD214A-T10ALF is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 10V
Voltage - Clamping (Max) @ Ipp: 17V (±tolerance acceptable)
Current - Peak Pulse (10/1000µs): 24.6A (minimum requirement)
Package / Case: DO-214AC (SMA)
Mounting Type: Surface Mount
Type: Zener, Unidirectional

Substitute Classification:

Direct Equivalents meet all primary criteria with identical electrical performance:

SMAJ10A (MDD) — Active status, identical specifications

Similar Substitutes maintain core voltage and package compatibility but may vary in peak pulse current or clamping voltage within acceptable operating ranges:

SMA6J10A-E3/5A (Vishay) — Higher peak pulse current (184A), higher clamping voltage (19.6V)
SMA6J10A-E3/61 (Vishay) — Higher peak pulse current (184A), higher clamping voltage (19.6V)
SMA6J10A-TP (Micro Commercial Co) — Similar clamping voltage (17V), higher peak pulse current (35.3A)
SMA6J10A-TR (STMicroelectronics) — Higher peak pulse current (184A), higher clamping voltage (19.6V)
SMAJ10A-TP (Micro Commercial Co) — Identical electrical specifications, active status

Related Alternatives share the same package and general application but operate at different voltage ratings:

SM4T12AY (STMicroelectronics) — 10V standoff, 21.7V clamping, higher peak pulse current (106A)
SMA6J11A-TP (Micro Commercial Co) — 11V standoff, 18.2V clamping, 33A peak pulse
SMAJ11A-M3/5A (Vishay) — 11V standoff, 18.2V clamping, 22A peak pulse

Parameter Comparison

Part Number	Manufacturer	Status	Standoff (V)	Breakdown Min (V)	Clamping Max (V)	Peak Pulse (A)	Power (W)	Temp Range (°C)	Package
CD214A-T10ALF	Bourns Inc.	Obsolete	10	11.1	17	24.6	400	-55 ~ 150	DO-214AC (SMA)
SMAJ10A	MDD	Active	10	11	17	24.6	400	-50 ~ 150	DO-214AC (SMA)
SMA6J10A-E3/5A	Vishay	Active	10	11.1	19.6	184 (8/20µs)	4000	-55 ~ 150	DO-214AC (SMA)
SMA6J10A-E3/61	Vishay	Active	10	11.1	19.6	184 (8/20µs)	4000	-55 ~ 150	DO-214AC (SMA)
SMA6J10A-TP	Micro Commercial Co	Active	10	11.1	17	35.3	600	-55 ~ 175	DO-214AC (SMA)
SMA6J10A-TR	STMicroelectronics	Active	10	11.1	19.6	184 (8/20µs)	600	-55 ~ 175	DO-214AC (SMA)
SMAJ10A-TP	Micro Commercial Co	Active	10	11.1	17	24.6	400	-55 ~ 175	DO-214AC (SMA)
SM4T12AY	STMicroelectronics	Active	10	11.1	21.7	106 (8/20µs)	400	-55 ~ 150	DO-214AC (SMA)
SMA6J11A-TP	Micro Commercial Co	Active	11	12.2	18.2	33	600	-55 ~ 175	DO-214AC (SMA)
SMAJ11A-M3/5A	Vishay	Active	11	12.2	18.2	22	400	-55 ~ 150	DO-214AC (SMA)

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SMAJ10A (MDD) is the primary direct equivalent. It maintains all critical electrical parameters (10V standoff, 17V clamping, 24.6A peak pulse) and is currently in active production status with ROHS3 compliance. The only minor difference is the lower temperature minimum (-50°C vs -55°C), which is acceptable for most general-purpose applications.

SMAJ10A-TP (Micro Commercial Co) provides an identical electrical specification alternative with extended upper temperature rating (-55°C to 175°C) and active product status, suitable for applications requiring higher temperature operation.

For Enhanced Performance (Higher Current Handling): SMA6J10A-TP (Micro Commercial Co) and SMA6J10A-TR (STMicroelectronics) offer significantly higher peak pulse current capability (35.3A and 184A respectively) while maintaining the 10V standoff voltage. These are suitable for applications requiring greater transient energy absorption. Both are active products with ROHS3 compliance.

For Voltage-Shifted Applications: SM4T12AY (STMicroelectronics) maintains the 10V standoff but increases clamping voltage to 21.7V with higher peak pulse current (106A). This part carries automotive qualification (AEC-Q101) and is suitable for automotive-grade applications.

SMA6J11A-TP and SMAJ11A-M3/5A shift the standoff voltage to 11V with corresponding clamping voltage increase to 18.2V. These are appropriate only if the circuit design permits the higher voltage threshold.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and MSL 1 rating. Vishay parts carry REACH Unaffected status, while MDD and STMicroelectronics parts are REACH Affected. Verify REACH compliance requirements for your specific application and supply chain.

Frequently Asked Questions (FAQ)

Q: Can SMAJ10A directly replace CD214A-T10ALF without circuit modification? A: Yes. SMAJ10A matches all critical electrical parameters (10V standoff, 17V clamping, 24.6A peak pulse) and uses the identical DO-214AC (SMA) package. The only difference is the lower temperature minimum (-50°C vs -55°C), which does not affect most general-purpose applications.

Q: What is the difference between "Direct Equivalent" and "Similar Substitute" parts? A: Direct equivalents (SMAJ10A, SMAJ10A-TP) maintain identical clamping voltage and peak pulse current specifications. Similar substitutes (SMA6J10A series, SM4T12AY) may have higher clamping voltages or peak pulse currents, providing enhanced protection but requiring circuit validation to ensure compatibility with the protected circuit's voltage tolerance.

Q: Can I use SMA6J10A-E3/5A as a drop-in replacement? A: SMA6J10A-E3/5A is electrically compatible but not a drop-in replacement. It has a higher clamping voltage (19.6V vs 17V) and significantly higher peak pulse current (184A vs 24.6A). Use this part only if your circuit design permits the higher clamping voltage and can benefit from the enhanced current handling capability.

Q: Why do some parts list different peak pulse current measurement standards (10/1000µs vs 8/20µs)? A: Different manufacturers use different pulse waveform standards for testing. The 10/1000µs waveform is common for general-purpose TVS diodes, while 8/20µs is used for higher-current applications. Parts using different standards are not directly comparable on peak pulse current alone; verify actual performance requirements for your application.

Q: Is the CD214A-T10ALF obsolete, and what are my options? A: Yes, CD214A-T10ALF is obsolete. SMAJ10A (MDD) is the recommended direct replacement with active production status and identical specifications. SMAJ10A-TP (Micro Commercial Co) offers the same electrical performance with extended temperature range and is also actively produced.

Q: Do all substitute parts have the same moisture sensitivity level? A: Yes. All listed substitutes maintain MSL 1 (Unlimited), matching the original CD214A-T10ALF specification. This means no baking or moisture control is required prior to soldering.

Q: Can I use parts with 11V standoff voltage (SMA6J11A-TP, SMAJ11A-M3/5A) instead of 10V? A: Only if your circuit design permits operation at the higher voltage threshold. These parts will not trigger protection until 11V standoff is exceeded, potentially allowing higher transient voltages to reach the protected circuit. Use only if the protected component can tolerate the additional voltage margin.

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