SMAJ17CA-13 Equivalent & Substitute Parts

Part Overview

The SMAJ17CA-13 is a surface mount transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the DO-214AC (SMA) package. This bidirectional Zener TVS diode provides 17V reverse standoff voltage with 27.6V maximum clamping voltage and 14.5A peak pulse current capability, designed for general purpose transient protection applications. The main part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	17V
Breakdown Voltage (Min)	18.9V
Clamping Voltage (Max) @ Ipp	27.6V
Peak Pulse Current (10/1000µs)	14.5A
Peak Pulse Power	400W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Type	Zener
Bidirectional Channels	1

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ17CA-13 is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Reverse Standoff Voltage: 17V (Typ)
Breakdown Voltage: 18.9V (Min)
Clamping Voltage: 27.6V (Max) @ Ipp
Peak Pulse Current: 14.5A nominal (14.49A acceptable within tolerance)
Peak Pulse Power: 400W
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Type: Zener, Bidirectional (1 channel)

All substitute parts listed maintain these electrical specifications within acceptable engineering tolerances. Packaging format (Tape & Reel vs. bulk) and manufacturer differences do not affect electrical interchangeability.

Parameter Comparison

Parameter	SMAJ17CA-13 (Diodes Inc.)	SMAJ17CA-13-F (Diodes Inc.)	SMAJ17CA (Meritek)	SMAJ17CA-TP (Micro Commercial Co)
Reverse Standoff Voltage (Typ)	17V	17V	17V	17V
Breakdown Voltage (Min)	18.9V	18.9V	18.9V	18.9V
Clamping Voltage (Max) @ Ipp	27.6V	27.6V	27.6V	27.6V
Peak Pulse Current (10/1000µs)	14.5A	14.5A	14.49A	14.5A
Peak Pulse Power	400W	400W	400W	400W
Operating Temperature Range	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C	-55°C ~ 175°C (TA)
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC (SMA)	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Type	Zener	Zener	Zener	Zener
Bidirectional Channels	1	1	1	1
Product Status	Discontinued	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SMAJ17CA-13-F (Diodes Incorporated) is the direct equivalent substitute. This part maintains identical electrical specifications and is the same manufacturer's active product variant. It is ROHS3 compliant and available in Tape & Reel packaging with 4,900 units in stock.

SMAJ17CA (Meritek) provides electrical equivalence with peak pulse current of 14.49A, which falls within acceptable tolerance of the 14.5A specification. This part is ROHS3 compliant and has the highest inventory availability at 30,400 units.

SMAJ17CA-TP (Micro Commercial Co) is electrically equivalent with extended operating temperature range to 175°C (TA), providing additional thermal margin. This part is ROHS3 compliant with 11,056 units in stock.

All three substitute parts are active products with current availability, ROHS3 compliance, and identical mechanical compatibility with the original SMAJ17CA-13 design.

Frequently Asked Questions (FAQ)

Q: Can SMAJ17CA-13-F be used as a direct replacement for SMAJ17CA-13?

A: Yes. SMAJ17CA-13-F is electrically and mechanically identical to SMAJ17CA-13. The primary difference is packaging format (Tape & Reel) and active product status. Both maintain 17V reverse standoff, 27.6V clamping voltage, and 14.5A peak pulse current.

Q: What is the difference between SMAJ17CA-13 and SMAJ17CA?

A: The SMAJ17CA (Meritek) differs only in manufacturer and peak pulse current specification (14.49A vs. 14.5A). This 0.01A variance is within normal manufacturing tolerance and does not affect circuit performance. Electrical characteristics, package, and mounting type are identical.

Q: Does the extended temperature range of SMAJ17CA-TP affect compatibility?

A: No. The SMAJ17CA-TP operating temperature range extends to 175°C (TA) compared to 150°C (TJ) for the original part. This provides additional thermal headroom and does not compromise compatibility. All other electrical and mechanical parameters are identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SMAJ17CA-13-F, SMAJ17CA (Meritek), and SMAJ17CA-TP are all ROHS3 compliant. The original SMAJ17CA-13 is RoHS non-compliant. Substitutes meet current environmental regulations.

Q: Does packaging format (Tape & Reel vs. bulk) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly logistics. Electrical and mechanical specifications remain identical regardless of packaging configuration.

Q: Which substitute part should be selected for new designs?

A: Selection depends on availability and compliance requirements. SMAJ17CA-13-F is the direct manufacturer equivalent. SMAJ17CA offers highest inventory. SMAJ17CA-TP provides extended temperature capability. All are electrically interchangeable for the specified application.

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