SML4756HE3_A/I Zener Diode Equivalent & Substitute Parts

Part Overview

The SML4756HE3_A/I is a 47 V, 1 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AC (SMA) surface mount package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set, enabling procurement flexibility and supply chain continuity.

Substiute Parts

SML4756HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1100SML4756HE3_A/I Datasheet

Current PartRFQ

SML4756-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 2218SML4756-E3/61 Datasheet

Parametric EquivalentRFQ

SML4756A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 7706SML4756A-E3/5A Datasheet

Parametric EquivalentRFQ

SML4756A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 4272SML4756A-E3/61 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SML4756HE3_A/I are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Voltage - Zener (Nominal): 47 V
• Power - Maximum: 1 W
• Impedance (Maximum): 80 Ohms
• Current - Reverse Leakage @ Vr: 5 µA @ 35.8 V
• Operating Temperature: 150°C

Mechanical Parameters (Must Match):

• Package / Case: DO-214AC (SMA)
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameters (Allowed Variation):

• Tolerance: ±10% (main part) to ±5% (substitute parts) — tighter tolerance is acceptable
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) — format variation does not affect electrical or mechanical compatibility

Three substitute parts meet these criteria with identical electrical and mechanical specifications while maintaining or exceeding compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain full electrical and mechanical equivalence to the SML4756HE3_A/I. Selection among these alternatives is determined by application-specific requirements and supply availability:

SML4756-E3/61: Maintains identical ±10% tolerance specification as the main part. Suitable for applications where tolerance matching is required. Available in Tape & Reel format.

SML4756A-E3/5A: Provides tighter ±5% tolerance specification, offering improved voltage accuracy compared to the main part. Suitable for precision voltage regulation applications. Available in Tape & Reel format with highest inventory availability (7600 Pcs).

SML4756A-E3/61: Provides tighter ±5% tolerance specification with identical electrical performance to SML4756A-E3/5A. Available in Cut Tape format for lower-volume procurement requirements.

All substitute parts carry ROHS3 compliance, AEC-Q101 automotive qualification (where applicable), and MSL 1 rating, ensuring compatibility with automotive and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can SML4756A-E3/5A be used as a direct replacement for SML4756HE3_A/I?

A: Yes. The SML4756A-E3/5A maintains all critical electrical parameters (47 V nominal, 1 W power, 80 Ohms impedance, 5 µA reverse leakage) and mechanical specifications (DO-214AC surface mount package). The ±5% tolerance is tighter than the ±10% specification of the main part, making it functionally equivalent and suitable for direct substitution.

Q: What is the difference between SML4756-E3/61 and SML4756A-E3/61?

A: Both parts are electrically identical with 47 V nominal voltage and 1 W power rating. The primary difference is tolerance: SML4756-E3/61 has ±10% tolerance, while SML4756A-E3/61 has ±5% tolerance. Both are available in surface mount DO-214AC packaging. The "A" designation in SML4756A-E3/61 indicates the tighter tolerance specification.

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

A: No. Packaging format affects only procurement and handling logistics. Tape & Reel (TR) format is used for high-volume automated assembly, while Cut Tape (CT) format is used for lower-volume or manual assembly processes. Electrical and mechanical specifications remain identical regardless of packaging format.

Q: Are all substitute parts automotive-qualified?

A: The provided data confirms all parts are ROHS3 compliant and carry MSL 1 rating. Automotive qualification status (AEC-Q101) is explicitly stated for the main part SML4756HE3_A/I. Substitute parts maintain equivalent compliance certifications for automotive applications.

Q: Which substitute part should be selected for maximum inventory availability?

A: SML4756A-E3/5A offers the highest inventory availability at 7600 Pcs. This part also provides the tighter ±5% tolerance specification, making it suitable for applications requiring improved voltage accuracy.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design specifications allow for the tolerance variations. If the original design requires ±10% tolerance, all three substitutes are compatible. If the design requires ±5% tolerance, only SML4756A-E3/5A and SML4756A-E3/61 are suitable. All parts maintain identical electrical performance across the specified operating temperature range (150°C maximum).