SMAJ45CA-TP Equivalent & Substitute Parts

Part Overview

The SMAJ45CA-TP is a Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose transient voltage protection in surface-mount applications. This bidirectional Zener diode operates with a 45V reverse standoff voltage and provides 72.7V clamping at peak pulse current, delivering 400W peak pulse power dissipation in a compact DO-214AC (SMA) package. The part is Active status and ROHS3 compliant with unlimited moisture sensitivity rating. Substitute parts are identified for applications requiring equivalent electrical performance or alternative sourcing options.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	45	V
Voltage - Breakdown (Min)	50	V
Voltage - Clamping (Max) @ Ipp	72.7	V
Current - Peak Pulse (10/1000µs)	5.5	A
Power - Peak Pulse	400	W
Package / Case	DO-214AC, SMA	-
Operating Temperature	-55 to 175	°C
Type	Zener	-
Bidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMAJ45CA-TP are qualified based on matching the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 45V
Voltage - Breakdown (Min): 50V
Voltage - Clamping (Max) @ Ipp: 72.7V
Current - Peak Pulse (10/1000µs): 5.5A
Power - Peak Pulse: 400W
Package / Case: DO-214AC, SMA
Type: Zener, Bidirectional (1 channel)
RoHS Status: ROHS3 Compliant

All identified substitutes maintain identical electrical specifications for voltage suppression and current handling. Package compatibility is preserved across all alternatives. Operating temperature ranges vary within acceptable limits for general-purpose applications. All substitutes are Active status products with unlimited moisture sensitivity rating.

Parameter Comparison

Parameter	SMAJ45CA-TP (Micro Commercial Co)	SMAJ45CA (MDD)	SMAJ45CA-13-F (Diodes Incorporated)
Voltage - Reverse Standoff (Typ)	45V	45V	45V
Voltage - Breakdown (Min)	50V	50V	50V
Voltage - Clamping (Max) @ Ipp	72.7V	72.7V	72.7V
Current - Peak Pulse (10/1000µs)	5.5A	5.5A	5.5A
Power - Peak Pulse	400W	400W	400W
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature Range	-55 to 175°C (TA)	-50 to 150°C (TJ)	-55 to 150°C (TJ)
Type	Zener	Zener	Zener
Bidirectional Channels	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain identical electrical performance specifications for transient voltage suppression applications. Selection between SMAJ45CA-TP, SMAJ45CA (MDD), and SMAJ45CA-13-F is determined by availability, packaging format, and operating temperature requirements.

SMAJ45CA-TP (Micro Commercial Co) supports the widest operating temperature range (-55 to 175°C TA) and is supplied in Tape & Reel packaging. This configuration is suitable for high-volume automated assembly processes.

SMAJ45CA (MDD) operates within -50 to 150°C (TJ) and is available with 6400 pieces in stock. Packaging format is not specified in the provided data.

SMAJ45CA-13-F (Diodes Incorporated) operates within -55 to 150°C (TJ) and is supplied in Tape & Reel packaging with 5100 pieces in stock. This part extends the lower temperature limit to match the original specification.

All parts are ROHS3 compliant, Active status, and carry unlimited moisture sensitivity rating, confirming suitability for standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can SMAJ45CA (MDD) be used as a direct replacement for SMAJ45CA-TP?

A: Yes. Both parts share identical electrical specifications: 45V reverse standoff, 72.7V clamping voltage, 5.5A peak pulse current, and 400W peak pulse power. Both are packaged in DO-214AC (SMA) format and are ROHS3 compliant. Operating temperature range differs slightly (-50 to 150°C vs -55 to 175°C), which may affect suitability depending on application thermal requirements.

Q: Is SMAJ45CA-13-F compatible with SMAJ45CA-TP in surface-mount assembly?

A: Yes. SMAJ45CA-13-F maintains identical electrical performance and uses the same DO-214AC (SMA) package. Both are supplied in Tape & Reel format, supporting automated pick-and-place assembly. Operating temperature range is -55 to 150°C (TJ), which covers most general-purpose applications but does not extend to the upper limit of the original part.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: Voltage - Reverse Standoff (45V), Voltage - Breakdown (50V minimum), Voltage - Clamping (72.7V maximum), Current - Peak Pulse (5.5A), Power - Peak Pulse (400W), and Package / Case (DO-214AC, SMA). All identified substitutes match these specifications exactly.

Q: Are there differences in packaging between these parts?

A: SMAJ45CA-TP and SMAJ45CA-13-F are both supplied in Tape & Reel (TR) format. SMAJ45CA (MDD) packaging format is not specified in the provided data. For automated assembly applications, Tape & Reel format is standard.

Q: Do all substitutes meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, carry ECCN EAR99 classification, and have unlimited moisture sensitivity rating (MSL 1). SMAJ45CA-TP and SMAJ45CA-13-F both carry REACH Unaffected status.

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