PMT6350MS Equivalent & Substitute Parts

Part Overview

The PMT6350MS is a Gas Discharge Tube (GDT) rated at 350V with 5kA impulse discharge current in a 3-pole configuration. Manufactured by Littelfuse, this component is designed for overvoltage protection applications requiring user-defined mounting. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PMT6350MS

LittelfuseIn Stock: 874PMT6350MS Datasheet

Current PartRFQ

SL1003A350SM

Littelfuse Inc.In Stock: 28533SL1003A350SM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PMT6350MS is determined by the following critical electrical and mechanical parameters:

• Voltage - DC Spark Over (Nominal): 350 V
• Number of Poles: 3
• Fail Short characteristic: No
• RoHS3 Compliance requirement

The substitute part SL1003A350SM maintains electrical compatibility through identical spark-over voltage and pole configuration. While the impulse discharge current rating differs (10kA versus 5kA), this represents an enhanced capability rather than a limitation, as the substitute can handle higher transient currents within the same voltage class. Both components are manufactured by Littelfuse and maintain ROHS3 compliance. The primary distinction lies in mounting technology: the substitute transitions from user-defined mounting to surface mount (SMD) configuration with tape & reel packaging, reflecting modern manufacturing practices for active production environments.

Parameter Comparison

Engineering Selection Recommendations

The SL1003A350SM serves as the active production substitute for the obsolete PMT6350MS. Both components share identical electrical specifications for spark-over voltage (350V) and pole configuration (3-pole), with matching fail-short characteristics and RoHS3 compliance status. The substitute's higher impulse discharge current rating (10kA versus 5kA) provides enhanced transient protection capability without compromising voltage regulation performance.

Selection of the SL1003A350SM requires evaluation of mounting compatibility. The transition from user-defined mounting to surface mount technology necessitates PCB redesign considerations. The SMD package format with tape & reel delivery supports automated assembly processes and is suitable for high-volume production environments. Both components maintain unlimited moisture sensitivity tolerance (MSL 1), ensuring consistent performance across storage and operational conditions.

Frequently Asked Questions (FAQ)

Q: Can the SL1003A350SM directly replace the PMT6350MS in existing designs?

A: Electrical substitution is valid based on matching spark-over voltage (350V) and 3-pole configuration. Physical mounting compatibility requires assessment of the PCB layout and assembly process. The PMT6350MS uses user-defined mounting while the SL1003A350SM is surface mount technology, necessitating potential circuit board modifications.

Q: What is the significance of the higher impulse discharge current rating in the substitute?

A: The SL1003A350SM is rated for 10kA impulse discharge current compared to the PMT6350MS at 5kA. This represents enhanced transient current handling capability within the same voltage class. The substitute can accommodate higher surge currents without compromising the 350V spark-over voltage specification.

Q: Are both components RoHS3 compliant?

A: Yes. Both the PMT6350MS and SL1003A350SM are ROHS3 compliant and maintain identical moisture sensitivity levels (MSL 1 - Unlimited), ensuring compatibility with modern manufacturing and environmental standards.

Q: What packaging differences exist between these components?

A: The PMT6350MS is supplied in bulk format with user-defined mounting configuration. The SL1003A350SM is packaged in tape & reel (TR) format optimized for automated surface mount assembly processes, reflecting the transition from legacy to current production technology.

Q: Are there any export or regulatory restrictions on these components?

A: Both components are classified under ECCN EAR99 and HTSUS code 8536.30.8000, indicating standard commercial classification without additional export restrictions.