CD214L-T36ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T36ALF is a 36V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional Zener diode features a 58.1V maximum clamping voltage and 51.6A peak pulse current capability in the DO-214AB (SMC) package. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	40V
Voltage - Clamping (Max) @ Ipp	58.1V
Current - Peak Pulse (10/1000µs)	51.6A
Power - Peak Pulse	3000W (3kW)
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AB, SMC
Type	Zener, Unidirectional
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD214L-T36ALF is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Reverse Standoff: 36V
Voltage - Clamping (Max) @ Ipp: 58.1V
Package / Case: DO-214AB, SMC
Type: Zener, Unidirectional
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Current - Peak Pulse (10/1000µs): 51.6A minimum
Power - Peak Pulse: 3000W minimum
Operating Temperature Range: -55°C minimum to 150°C maximum
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped into two categories:

Direct Equivalents: Parts matching all primary criteria with identical electrical performance (SMLJ36A, SMDJ36A-HR, SMLJ36A-TP, SMDJ36A).

Similar Alternatives: Parts meeting primary voltage and package criteria but with variations in peak pulse current, power dissipation, or operating temperature range (5.0SMDJ36A, 5.0SMDJ36A-T7, SMCJ36A, SMCJ36A-TP, TPSMC39A).

Parameter Comparison

Part Number	Manufacturer	VWM (Typ)	Clamp Voltage @ Ipp	Peak Pulse Current	Peak Pulse Power	Temp Range	Package	Status
CD214L-T36ALF	Bourns Inc.	36V	58.1V	51.6A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Obsolete
SMLJ36A	Bourns Inc.	36V	58.1V	51.6A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMDJ36A-HR	Littelfuse Inc.	36V	58.1V	51.6A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMLJ36A-TP	Micro Commercial Co	36V	58.1V	51.6A	3000W	-55°C ~ 175°C	DO-214AB, SMC	Active
SMDJ36A	EVVO Semi	36V	58.1V	N/A	N/A	N/A	DO-214AB	Active
5.0SMDJ36A	Taiwan Semiconductor Corporation	36V	58.1V	86.1A	5000W	-55°C ~ 175°C	DO-214AB, SMC	Active
5.0SMDJ36A-T7	Littelfuse Inc.	36V	58.1V	86.1A	5000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMCJ36A	EVVO Semi	36V	58.1V	25.9A	600W	-65°C ~ 150°C	DO-214AC, SMA	Active
SMCJ36A-TP	Micro Commercial Co	36V	58.1V	25.9A	1500W	-55°C ~ 175°C	DO-214AB, SMC	Active
TPSMC39A	Littelfuse Inc.	33.3V	53.9V	28.2A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active

Engineering Selection Recommendations

Preferred Direct Substitutes (Identical Electrical Performance):

SMLJ36A (Bourns Inc., Active) is the primary recommended substitute, offering identical electrical specifications and the same manufacturer as the original part. SMDJ36A-HR (Littelfuse Inc., Active) provides equivalent performance with extended lower temperature rating (-65°C) and is suitable for applications requiring enhanced cold-temperature operation. SMLJ36A-TP (Micro Commercial Co, Active) matches all electrical parameters and extends the upper operating temperature to 175°C, beneficial for high-temperature environments.

Higher-Performance Alternatives:

5.0SMDJ36A (Taiwan Semiconductor Corporation, Active) and 5.0SMDJ36A-T7 (Littelfuse Inc., Active) provide enhanced surge capability with 86.1A peak pulse current and 5000W power dissipation, suitable for applications requiring greater transient protection margin. Both maintain the 36V standoff voltage and 58.1V clamping voltage of the original part.

Lower-Performance Alternatives:

SMCJ36A-TP (Micro Commercial Co, Active) and SMCJ36A (EVVO Semi, Active) reduce peak pulse current to 25.9A and power dissipation to 600W–1500W. These are suitable only for applications with reduced transient energy requirements. SMCJ36A uses DO-214AC (SMA) package, requiring PCB layout modification.

Marginal Substitute:

TPSMC39A (Littelfuse Inc., Active, AEC-Q101 Automotive Grade) operates at 33.3V standoff voltage with 53.9V clamping voltage, representing a voltage deviation from the original specification. This part is suitable only when the lower voltage rating is acceptable for the application.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can SMLJ36A directly replace CD214L-T36ALF without circuit modification?

A: Yes. SMLJ36A matches all critical electrical parameters: 36V standoff voltage, 58.1V clamping voltage, 51.6A peak pulse current, and 3000W power dissipation. Both use DO-214AB (SMC) package. No circuit or PCB layout changes are required.

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

A: Direct equivalents (SMLJ36A, SMDJ36A-HR, SMLJ36A-TP, SMDJ36A) maintain identical standoff voltage, clamping voltage, and minimum current/power ratings. Similar alternatives (5.0SMDJ36A series, SMCJ36A variants, TPSMC39A) may have different peak pulse current, power dissipation, or voltage ratings. Selection depends on application requirements.

Q: Can I use 5.0SMDJ36A instead of the original part?

A: Yes, with consideration. 5.0SMDJ36A maintains the same 36V standoff and 58.1V clamping voltage but provides higher peak pulse current (86.1A vs. 51.6A) and power dissipation (5000W vs. 3000W). This represents a performance upgrade suitable for applications requiring greater transient protection margin. No circuit modification is necessary.

Q: Why does SMCJ36A use a different package (SMA vs. SMC)?

A: SMCJ36A uses DO-214AC (SMA) package instead of DO-214AB (SMC). While both are surface-mount packages, they have different footprints. PCB layout modification is required for this substitution. Verify footprint compatibility before selection.

Q: Is TPSMC39A a suitable substitute?

A: TPSMC39A is a marginal substitute only. It operates at 33.3V standoff voltage and 53.9V clamping voltage, lower than the original 36V/58.1V specification. Use only if the application can tolerate this voltage reduction. Peak pulse current (28.2A) and power dissipation (1500W) are also reduced.

Q: What compliance certifications should I verify?

A: All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating. TPSMC39A carries additional AEC-Q101 automotive-grade qualification. Verify REACH status and ECCN classification for your specific supply chain requirements.

Q: Can I mix different manufacturers in production?

A: Yes. All recommended substitutes are functionally equivalent within their specified parameter ranges. However, maintain consistent sourcing within a production batch to ensure uniform performance characteristics and traceability.

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