AZ851-5 General Purpose Relay DPDT 5V Equivalent & Substitute Parts

Part Overview

The AZ851-5 is an active general purpose relay manufactured by American Zettler, featuring a DPDT (2 Form C) contact configuration with 1 A contact rating and 5VDC coil voltage. This surface mount relay is designed for general purpose switching applications requiring sealed, fully rated contacts with silver palladium and gold contact materials.

Equivalent and substitute parts are identified based on matching core electrical parameters: 5VDC coil voltage, DPDT contact form, non-latching coil type, gull wing termination, and compatible operating characteristics. Substitute parts may differ in contact current rating, switching voltage specifications, or relay classification while maintaining functional compatibility within defined application parameters.

Substiute Parts

AZ851-5

American ZettlerIn Stock: 885AZ851-5 Datasheet

Current PartRFQ

TQ2SA-5V

Panasonic Electric WorksIn Stock: 18997TQ2SA-5V Datasheet

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V23079E1201B301

TE Connectivity Potter & Brumfield RelaysIn Stock: 9148V23079E1201B301 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AZ851-5 are qualified based on the following matching parameters:

Core Matching Criteria:

• Coil voltage: 5VDC (exact match required)
• Contact form: DPDT (2 Form C) (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination style: Gull Wing (exact match required)
• Coil current: 28.1 mA (within tolerance)
• Must operate voltage: 3.75 VDC (exact match)
• Must release voltage: 0.5 VDC (exact match)
• Operating temperature range: -40°C ~ 85°C (exact match)
• Coil resistance: 178 Ohms (exact match)
• RoHS3 compliance: Required

Parameters Allowed to Vary:

• Contact rating (current): 1 A or higher
• Switching voltage: 125VAC or higher, 220VDC or higher
• Relay type classification: General Purpose or Telecom
• Coil type: Non-latching or latching configurations
• Contact material composition: Silver Palladium, Silver Nickel, or Gold
• Seal rating: Sealed or unsealed
• Operate/release time: Within application tolerance

The substitute parts TQ2SA-5V and V23079E1201B301 meet all core matching criteria and are therefore qualified as functional equivalents for the AZ851-5.

Parameter Comparison

Engineering Selection Recommendations

AZ851-5 (American Zettler)

• Primary choice for applications requiring 1 A contact rating with general purpose relay classification
• Operates and releases within 2 ms and 1 ms respectively
• Supports 250VAC switching voltage
• ROHS3 compliant and active product status

TQ2SA-5V (Panasonic Electric Works)

• Suitable for applications requiring 2 A contact rating with telecom relay classification
• Longer operate and release times (4 ms each) compared to AZ851-5
• Supports 125VAC switching voltage (lower than AZ851-5)
• ROHS3 compliant, REACH unaffected, and active product status
• Higher inventory availability (18,940 pcs)

V23079E1201B301 (TE Connectivity Potter & Brumfield Relays)

• Suitable for applications requiring 2 A contact rating with latching, dual coil configuration
• Longer operate and release times (4 ms each) compared to AZ851-5
• Supports 250VAC switching voltage (equivalent to AZ851-5)
• ROHS3 compliant, MSL 3 rating, and active product status
• Dual coil latching design differs from non-latching AZ851-5 operation

All three parts are active products with ROHS3 compliance and compatible core electrical parameters for 5VDC DPDT surface mount relay applications.

Frequently Asked Questions (FAQ)

Q: Can TQ2SA-5V replace AZ851-5 in all applications?

A: TQ2SA-5V is functionally compatible as a substitute where the application tolerates 2 A contact rating, 4 ms operate/release times, and 125VAC maximum switching voltage. Applications requiring 1 A contact rating, faster switching times (2 ms operate, 1 ms release), or 250VAC switching voltage should use AZ851-5 or V23079E1201B301.

Q: What is the key difference between AZ851-5 and V23079E1201B301?

A: The primary difference is coil type: AZ851-5 uses non-latching coil design, while V23079E1201B301 uses latching, dual coil design. This affects power consumption and control circuit requirements. Both support 250VAC switching voltage and 2 A contact rating for V23079E1201B301.

Q: Are all three parts pin-compatible?

A: All three parts use gull wing termination and surface mount packaging. Pin compatibility depends on specific PCB footprint design. Verify footprint dimensions and pin spacing with manufacturer datasheets before substitution.

Q: Which substitute part has the fastest switching response?

A: AZ851-5 has the fastest switching response with 2 ms operate time and 1 ms release time. Both TQ2SA-5V and V23079E1201B301 operate and release at 4 ms each.

Q: Can V23079E1201B301 be used in place of AZ851-5 for non-latching applications?

A: V23079E1201B301 features latching, dual coil design, which requires different control circuitry than non-latching relays. It is not recommended as a direct substitute for non-latching applications without circuit redesign.

Q: What is the packaging difference between these parts?

A: AZ851-5 is packaged in boxes. TQ2SA-5V is packaged in tubes. V23079E1201B301 is packaged in cut tape and digi-reel format. Packaging affects handling, storage, and automated assembly compatibility.

Q: Are all parts RoHS compliant?

A: Yes, all three parts are ROHS3 compliant. V23079E1201B301 additionally carries REACH unaffected status and MSL 3 moisture sensitivity level rating.