Request Quote
(Ships tomorrow)
VF4-45F11 Equivalent & Substitute Parts
Part Overview
The VF4-45F11 is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays. This SPDT (1 Form C) relay features a 12VDC coil, 40A contact rating, and chassis mount termination with 0.250" (6.3mm) quick connect terminals. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing applications requiring SPDT relay functionality at 12VDC with 40A switching capacity.
Substiute Parts
Key Parameters
| Parameter | VF4-45F11 Value |
|---|---|
| Coil Voltage | 12VDC |
| Contact Form | SPDT (1 Form C) |
| Contact Rating (Current) | 40 A |
| Switching Voltage | 14VDC - Nom |
| Mounting Type | Chassis Mount |
| Termination Style | Plug In, Quick Connect - 0.250" (6.3mm) |
| Coil Type | Non Latching |
| Operating Temperature Range | -40°C ~ 125°C |
| Contact Material | Silver Nickel (AgNi) |
| Coil Resistance | 90 Ohms |
| Must Operate Voltage | 7.2 VDC |
| Must Release Voltage | 1.2 VDC |
Substitute Part Grouping Explanation
Substitution of the VF4-45F11 is determined by strict equivalence in the following critical parameters:
Primary Substitution Criteria:
- Coil voltage: 12VDC
- Contact form: SPDT (1 Form C)
- Contact rating: 40A minimum
- Mounting type: Chassis Mount
- Termination style: Quick Connect 0.250" (6.3mm)
- Coil type: Non Latching
Secondary Compatibility Factors:
- Operating temperature range (minimum -40°C to 125°C preferred)
- Must operate voltage (7.2 VDC or lower)
- Must release voltage (1.2 VDC or lower)
- Switching voltage (14VDC nominal)
Substitute parts are classified into two categories:
Direct Substitutes (40A Rating): Parts meeting all primary criteria with identical 40A contact rating. These include CB1-WM-12V, CB1F-SM-12V, CB1F-T-M-12V, CB1F-T-R-M-12V, CB1-M-12V, CB1-SM-12V, CB1F-M-12V, and CB1F-WM-12V from Panasonic Electric Works CB series, and 3-1904022-2 from TE Connectivity AXICOM V23234 series.
Similar Substitutes (30A Rating): Parts meeting all primary criteria except contact rating, which is reduced to 30A. These include 1432791-1 from TE Connectivity Potter & Brumfield VF4 series. These are suitable only for applications where maximum switching current does not exceed 30A.
Parameter Comparison
| Parameter | VF4-45F11 | CB1-WM-12V | CB1F-SM-12V | CB1F-T-M-12V | CB1F-T-R-M-12V | CB1-M-12V | CB1-SM-12V | CB1F-M-12V | CB1F-WM-12V | 3-1904022-2 | 1432791-1 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | TE Connectivity Potter & Brumfield | Panasonic Electric Works | Panasonic Electric Works | Panasonic Electric Works | Panasonic Electric Works | Panasonic Electric Works | Panasonic Electric Works | Panasonic Electric Works | Panasonic Electric Works | TE Connectivity AXICOM | TE Connectivity Potter & Brumfield |
| Coil Voltage | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC | 12VDC |
| Contact Form | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) | SPDT (1 Form C) |
| Contact Rating (Current) | 40 A | 40 A | 40 A | 40 A | 40 A | 40 A | 40 A | 40 A | 40 A | 30 A | 30 A |
| Switching Voltage | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 14VDC - Nom | 12VDC - Nom | 14VDC - Nom |
| Mounting Type | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount |
| Termination Style | Plug In, Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.250" (6.3mm) | Quick Connect - 0.187"/0.250" | Plug In, Quick Connect - 0.250" (6.3mm) |
| Coil Type | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching | Non Latching |
| Operating Temperature Range | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 105°C | -40°C ~ 85°C |
| Must Operate Voltage | 7.2 VDC | 7 VDC | 7 VDC | 7 VDC | 7 VDC | 7 VDC | 7 VDC | 7 VDC | 7 VDC | 8 VDC | 7.8 VDC |
| Must Release Voltage | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.2 VDC | 1.5 VDC | 1.2 VDC |
| Coil Current | 133 mA | 117 mA | 117 mA | 117 mA | 134 mA | 117 mA | 117 mA | 117 mA | 117 mA | 141.2 mA | 133 mA |
| Coil Resistance | 90 Ohms | 103 Ohms | 103 Ohms | 103 Ohms | 89.5 Ohms | 103 Ohms | 103 Ohms | 103 Ohms | 103 Ohms | 85 Ohms | 90 Ohms |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Obsolete |
| RoHS Status | Not Specified | ROHS3 Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | Not Specified |
Engineering Selection Recommendations
Preferred Direct Substitutes (40A Rating, Active Status):
The Panasonic Electric Works CB series relays CB1F-T-M-12V and CB1F-T-R-M-12V are the primary recommended substitutes. Both parts maintain the full 40A contact rating, support the extended operating temperature range of -40°C to 125°C matching the VF4-45F11, and are classified as active products with RoHS compliance. CB1F-T-M-12V provides sealed flux protection with standard coil specifications, while CB1F-T-R-M-12V includes an integrated resistor feature with coil resistance of 89.5 Ohms closely matching the original 90 Ohms.
Alternative Direct Substitutes (40A Rating, Active Status):
CB1-WM-12V, CB1F-SM-12V, CB1-M-12V, CB1-SM-12V, CB1F-M-12V, and CB1F-WM-12V from Panasonic Electric Works are functionally equivalent direct substitutes with 40A contact rating and active product status. These parts operate within -40°C to 85°C temperature range, which is suitable for applications not requiring the extended 125°C upper limit. All Panasonic CB series parts feature sealed construction and RoHS compliance.
TE Connectivity AXICOM Alternative (40A Rating, Active Status):
Part 3-1904022-2 from TE Connectivity AXICOM V23234 series provides a 40A direct substitute with active product status and ROHS3 compliance. This part operates within -40°C to 105°C temperature range and features quick connect termination compatible with 0.187" and 0.250" terminals. The must operate voltage of 8 VDC is higher than the VF4-45F11 specification of 7.2 VDC.
Reduced Rating Alternative (30A Rating, Active Status):
Part 1432791-1 from TE Connectivity Potter & Brumfield VF4 series is a 30A substitute suitable only for applications where maximum switching current does not exceed 30A. This part maintains the same VF4 series base product number and is compatible with the original termination style. Operating temperature range is -40°C to 85°C.
Compliance Considerations:
All active substitute parts listed carry RoHS compliance certification. The VF4-45F11 original part does not specify RoHS status. Applications subject to RoHS regulatory requirements should select from the active substitute parts with explicit RoHS compliance documentation.
Frequently Asked Questions (FAQ)
Q: Can CB1-WM-12V directly replace VF4-45F11 in all applications?
A: CB1-WM-12V is a direct electrical and mechanical substitute for the VF4-45F11 with matching 40A contact rating, 12VDC coil, SPDT form, and 0.250" quick connect termination. The operating temperature range differs: CB1-WM-12V operates -40°C to 85°C while VF4-45F11 operates -40°C to 125°C. Applications requiring operation above 85°C should use CB1F-T-M-12V or CB1F-T-R-M-12V instead.
Q: What is the difference between CB1F-T-M-12V and CB1F-T-R-M-12V?
A: Both parts are functionally equivalent 40A SPDT relays with 12VDC coils and extended -40°C to 125°C operating temperature range. CB1F-T-R-M-12V includes an integrated resistor feature and has a coil resistance of 89.5 Ohms compared to 103 Ohms in CB1F-T-M-12V. The resistor variant is suitable for applications requiring transient suppression in the coil circuit.
Q: Why is 1432791-1 listed as a similar substitute rather than a direct substitute?
A: Part 1432791-1 has a reduced contact rating of 30A compared to the VF4-45F11 specification of 40A. This part is suitable only for applications where the maximum switching current requirement does not exceed 30A. All other electrical and mechanical parameters are compatible.
Q: Are all Panasonic CB series substitutes interchangeable?
A: All Panasonic CB series parts listed (CB1-WM-12V, CB1F-SM-12V, CB1-M-12V, CB1-SM-12V, CB1F-M-12V, CB1F-WM-12V) share identical electrical specifications for 40A contact rating, 12VDC coil, SPDT form, and 0.250" quick connect termination. Differences exist in sealing features (fully sealed versus flux protection) and operating temperature range. Parts with "F" designation include flux protection. Parts with "T" designation support extended temperature range to 125°C.
Q: What is the impact of different coil resistance values among substitutes?
A: The VF4-45F11 has 90 Ohms coil resistance. Panasonic CB series parts have 103 Ohms, while CB1F-T-R-M-12V has 89.5 Ohms and 3-1904022-2 has 85 Ohms. These differences affect coil current draw and power consumption. At 12VDC, the VF4-45F11 draws 133 mA while most Panasonic CB parts draw 117 mA. Higher resistance results in lower coil current and reduced power dissipation. Applications with current-limited power supplies should verify compatibility with the substitute coil current specification.
Q: Is the 3-1904022-2 AXICOM part suitable for high-temperature applications?
A: Part 3-1904022-2 operates within -40°C to 105°C temperature range, which is between the standard Panasonic CB range of 85°C and the extended range of 125°C. For applications requiring operation above 105°C, use CB1F-T-M-12V or CB1F-T-R-M-12V which support -40°C to 125°C.
Q: What are the termination compatibility considerations for 3-1904022-2?
A: Part 3-1904022-2 features quick connect termination compatible with both 0.187" and 0.250" terminals, providing flexibility in installation. The VF4-45F11 specifies 0.250" (6.3mm) quick connect terminals. Verify that existing wiring harnesses and connector receptacles are compatible with the 0.187"/0.250" dual-size specification of the AXICOM part.
Q: Are there any RoHS compliance differences between substitutes?
A: The VF4-45F11 does not specify RoHS status. All active substitute parts carry explicit RoHS compliance: Panasonic CB series parts are RoHS or ROHS3 compliant, and 3-1904022-2 is ROHS3 compliant. Applications subject to RoHS regulatory requirements should select from these active substitutes with documented compliance.
Q: Can VF4-45F11 be replaced with 1432791-1 in automotive applications?
A: Part 1432791-1 is a 30A relay suitable only for applications where maximum switching current does not exceed 30A. Automotive applications typically require the full 40A rating of the VF4-45F11. Use 1432791-1 only if the specific application circuit has been verified to operate below 30A continuous current.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts