1N5248B_S00Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5248B_S00Z is an 18 V, 500 mW Zener diode manufactured by onsemi in a DO-35 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance with a maximum impedance of 21 Ohms.

Substiute Parts

1N5248B_S00Z

onsemiIn Stock: 12171N5248B_S00Z Datasheet

Current PartRFQ

1N5248B

Microchip TechnologyIn Stock: 627431N5248B Datasheet

SimilarRFQ

1N967B BK PBFREE

Central Semiconductor CorpIn Stock: 11801N967B BK PBFREE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5248B_S00Z is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage - Zener (Nominal): 18 V
• Tolerance: ±5%
• Power - Maximum: 500 mW
• Impedance (Maximum): 21 Ohms
• Mounting Type: Through Hole
• Package / Case: DO-35 (DO-204AH)

Parts meeting these specifications are classified as parametric equivalents. Variations in secondary parameters such as reverse leakage current, forward voltage, and operating temperature range do not disqualify a part from substitution provided the primary electrical and mechanical specifications remain within tolerance.

Parameter Comparison

Engineering Selection Recommendations

1N5248B (Microchip Technology): This part is an exact parametric equivalent to the 1N5248B_S00Z with identical electrical specifications. The part maintains active product status with substantial inventory availability (62,638 pieces). The operating temperature range is reduced to -65°C to 175°C compared to the original specification of -65°C to 200°C. Forward voltage is specified at 1.5 V versus 1.2 V for the original part. RoHS non-compliance status should be evaluated against application requirements.

1N967B BK PBFREE (Central Semiconductor Corp): This part meets all critical electrical and mechanical substitution parameters with identical zener voltage, tolerance, power rating, and impedance specifications. The part is ROHS3 compliant, addressing regulatory requirements where applicable. Operating temperature range extends to 200°C, matching the original specification. Reverse leakage current is specified at 5 µA @ 13.7 V, which is higher than the original 100 nA @ 14 V. Forward voltage is specified at 1.5 V @ 200 mA. Active product status with 1,103 pieces in inventory.

Frequently Asked Questions (FAQ)

Q: Can the 1N5248B from Microchip Technology be used as a direct replacement for the obsolete 1N5248B_S00Z?

A: Yes. The Microchip Technology 1N5248B meets all critical electrical and mechanical parameters: 18 V zener voltage, ±5% tolerance, 500 mW power rating, 21 Ohms maximum impedance, and DO-35 through-hole package. The reduced operating temperature maximum of 175°C versus 200°C and forward voltage of 1.5 V versus 1.2 V must be evaluated for specific application requirements.

Q: What is the difference between the 1N5248B and 1N967B BK PBFREE?

A: Both parts are parametric equivalents with identical zener voltage (18 V), tolerance (±5%), power rating (500 mW), impedance (21 Ohms), and package (DO-35). The 1N967B BK PBFREE offers ROHS3 compliance and extended temperature operation to 200°C. Reverse leakage current differs: 1N5248B specifies 100 nA @ 14 V while 1N967B BK PBFREE specifies 5 µA @ 13.7 V.

Q: Are all substitute parts available in the same DO-35 package?

A: Yes. All substitute parts listed are supplied in DO-35 (DO-204AH) axial through-hole packages, ensuring mechanical and electrical compatibility with the original 1N5248B_S00Z footprint and mounting requirements.

Q: Does RoHS compliance affect substitution eligibility?

A: RoHS compliance is a regulatory and procurement consideration, not an electrical substitution criterion. The 1N5248B from Microchip Technology is RoHS non-compliant, while the 1N967B BK PBFREE is ROHS3 compliant. Selection depends on application regulatory requirements and supply chain specifications.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance indicates the maximum deviation of the actual zener voltage from the nominal 18 V specification. All substitute parts maintain this tolerance, ensuring consistent voltage regulation performance across the specified operating range.