CR1553AB Equivalent & Substitute Parts

Part Overview

The CR1553AB is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose voltage protection applications. This component features a 130V reverse standoff voltage rating and operates across a temperature range of -55°C to 175°C. The device is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The CR1553AB utilizes a through-hole TO-220 Modified package configuration with three channels for bidirectional protection.

Substiute Parts

CR1553AB

LittelfuseIn Stock: 1138CR1553AB Datasheet

Current PartRFQ

P1553ABL

Littelfuse Inc.In Stock: 5285P1553ABL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CR1553AB is determined by the following critical parameters that must align between the main part and substitute components:

Primary Substitution Criteria:

• Voltage rating alignment: Reverse standoff voltage of 130V and breakdown voltage minimum of 180V
• Package compatibility: 3-SIP configuration in TO-220 Modified form factor
• Channel configuration: Three-channel bidirectional protection capability
• Mounting type: Through-hole installation requirement
• Temperature operating range: -55°C to 175°C minimum

The P1553ABL qualifies as a manufacturer-recommended substitute based on these parameters. While the P1553ABL represents a different device technology (TVS Thyristor from the SIDACtor® series rather than a Zener diode), it maintains electrical compatibility through equivalent voltage ratings and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The P1553ABL is the manufacturer-recommended substitute for the obsolete CR1553AB. Selection of this substitute is supported by the following engineering factors:

Product Status Consideration: The CR1553AB is classified as obsolete, creating supply chain risk for ongoing production and field support. The P1553ABL maintains active product status with current manufacturing availability.

Compliance and Certification: The P1553ABL achieves ROHS3 compliance and REACH unaffected status, providing regulatory alignment for modern applications. The CR1553AB is RoHS non-compliant, which may restrict use in regulated markets and applications with environmental compliance requirements.

Electrical Compatibility: Both components maintain identical voltage ratings (130V reverse standoff, 180V breakdown minimum) and three-channel configuration, ensuring functional equivalence in circuit protection applications.

Package and Mounting Compatibility: Both parts utilize the 3-SIP TO-220 Modified package with through-hole mounting, enabling direct physical substitution without PCB redesign.

Moisture Sensitivity: Both components share MSL 1 (Unlimited) classification, indicating equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the P1553ABL be used as a direct replacement for CR1553AB in existing designs?

A: Yes. The P1553ABL maintains identical voltage ratings (130V standoff, 180V breakdown), three-channel configuration, and TO-220 Modified 3-SIP package specifications. Physical and electrical substitution is compatible without circuit modification.

Q: What is the primary difference between the CR1553AB and P1553ABL?

A: The CR1553AB is a Zener-type TVS diode from the SiBOD™ series, while the P1553ABL is a thyristor-based TVS device from the SIDACtor® series. Both provide equivalent voltage protection performance at the specified ratings. The P1553ABL offers the additional advantage of active product status and ROHS3 compliance.

Q: Are there any performance differences in peak pulse current handling?

A: The P1553ABL specifies peak pulse current ratings of 250A (8/20µs) and 80A (10/1000µs), with a hold current of 150mA. The CR1553AB does not provide these specifications in the available documentation. Circuit designers should verify that the P1553ABL's current ratings meet application requirements.

Q: Does the P1553ABL require different PCB layout or thermal management?

A: Both components use identical TO-220 Modified packaging and 3-SIP configuration. PCB layout and thermal management approaches remain unchanged. Mounting hole spacing and lead positioning are compatible.

Q: What is the inventory status for these components?

A: The CR1553AB has 1111 pieces available as new original stock. The P1553ABL has 5200 pieces available as new original stock, providing superior supply chain availability for ongoing production requirements.

Q: Are there any temperature range limitations when substituting?

A: Both components operate across -55°C to 175°C (junction temperature). Temperature operating ranges are equivalent, and no thermal performance adjustment is required.