1KSMB160C Equivalent & Substitute Parts

Part Overview

The 1KSMB160C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 136V reverse standoff voltage with a 219V maximum clamping voltage and 4.6A peak pulse current capability in a surface mount DO-214AA (SMB) package. The 1KSMB160C is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements.

Substiute Parts

1KSMB160C

Littelfuse Inc.In Stock: 7761KSMB160C Datasheet

Current PartRFQ

1KSMB160CA

Littelfuse Inc.In Stock: 302871KSMB160CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1KSMB160C is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

• Voltage - Reverse Standoff: 136V (Typ)
• Voltage - Clamping (Max) @ Ipp: 219V
• Current - Peak Pulse (10/1000µs): 4.6A
• Power - Peak Pulse: 1000W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

The 1KSMB160CA is a direct electrical equivalent manufactured by Littelfuse Inc. within the same 1KSMB series. This part maintains identical electrical specifications while offering active product status and improved availability. The primary distinction is packaging format (Tape & Reel versus bulk) and operating temperature range variance.

Parameter Comparison

Engineering Selection Recommendations

The 1KSMB160CA is the primary substitute for the obsolete 1KSMB160C. Both parts are manufactured by Littelfuse Inc. and maintain identical electrical performance specifications across all critical parameters: reverse standoff voltage, clamping voltage, peak pulse current, and power dissipation.

The 1KSMB160CA offers the following advantages:

• Active product status with full manufacturing support
• ROHS3 compliance certification (enhanced regulatory alignment)
• Significantly higher inventory availability (30,200 units versus 667 units)
• Tape & Reel packaging suitable for automated assembly processes

The operating temperature range of the 1KSMB160CA (-55°C to 150°C) is narrower than the 1KSMB160C (-65°C to 150°C) by 10°C at the lower bound. This difference is relevant only for applications requiring operation below -55°C. For standard telecom and general-purpose applications within the -55°C to 150°C range, the 1KSMB160CA provides full functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 1KSMB160CA be used as a direct replacement for the 1KSMB160C?

A: Yes, the 1KSMB160CA is a direct electrical equivalent. Both parts share identical voltage ratings (136V standoff, 219V clamping), current specifications (4.6A peak pulse), and power dissipation (1000W). The package format (DO-214AA, SMB) and mounting type (surface mount) are identical. The primary consideration is the operating temperature range: the 1KSMB160CA operates from -55°C to 150°C, while the 1KSMB160C operates from -65°C to 150°C.

Q: What is the difference between the 1KSMB160C and 1KSMB160CA packaging?

A: The 1KSMB160C is supplied in bulk packaging, while the 1KSMB160CA is supplied in Tape & Reel (TR) format. Both use the same DO-214AA (SMB) component package. Tape & Reel packaging is optimized for automated pick-and-place assembly processes, whereas bulk packaging is suitable for manual assembly or lower-volume applications.

Q: Are there compliance differences between these parts?

A: The 1KSMB160C carries RoHS Compliant certification, while the 1KSMB160CA carries ROHS3 Compliant certification. Both parts are EAR99 classified and share the same HTSUS code (8541.10.0080). The ROHS3 designation indicates compliance with the most current RoHS directive requirements. Both parts have MSL rating of 1 (Unlimited moisture sensitivity).

Q: Why is the 1KSMB160C listed as obsolete?

A: The 1KSMB160C is classified as obsolete due to the availability of the active equivalent 1KSMB160CA. Littelfuse Inc. maintains the 1KSMB160CA as the current production part for this electrical specification, with significantly higher inventory levels and ongoing manufacturing support.

Q: What applications are these TVS diodes suitable for?

A: The 1KSMB160C was specified for telecom applications, while the 1KSMB160CA is designated for general-purpose applications. Both parts function identically as transient voltage suppressors for protecting circuits against voltage transients and electrostatic discharge events in surface mount implementations.

Q: Is the 1KSMB160CA suitable for automotive applications?

A: The 1KSMB160C carries an automotive grade designation, while the 1KSMB160CA does not specify automotive grading in the provided specifications. For applications requiring automotive-grade components, this distinction should be evaluated against specific design requirements.