Latching Form C Alternatives
G15L · G2L · G8L · G6xLC · G7xLC
Pulse-switched SPDT versions that hold position without continuous coil power.
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SPDT High Voltage Relays — Single-Pole Double-Throw Contact
23 models · 3.5-70 kVdc switching · 5-150 A continuous · Vacuum / gas-filled hermetic construction · Source selection, transfer switching, signal routing
The GIGAVAC SPDT family switches a single moving pole between two fixed terminals (1 Form C). With the coil de-energised the load sits on the NC contact; on energisation it transfers to the NO contact — the canonical building block for source selection, redundant-feed transfer switching, polarity routing and HV signal / load distribution. Isolation is provided between the moveable contact and the opposing stationary terminal.
Vacuum or gas-filled hermetic construction enables a wide switching range from 3.5 kVdc up to 70 kVdc with continuous current from 5 A to 150 A. Vacuum dielectric is preferred for high switching speed and long life; gas-filled construction is preferred for high inrush / surge current ruggedness.
Where an SPST-NO, SPST-NC or latching variant of the same frame exists, the model card shows a cross-link; the configurator generates the original Sensata part-no automatically based on contact / coil / mount selections.
Source SelectionRedundant Feed Transfer SwitchHV Signal RoutingATE & Test SystemsPolarity ReversalEV Charging RoutingX-Ray & Medical DevicesScientific Instrumentation
SERIES CERTIFICATIONS09APPROVALS
- UL1604
- IP67
- IP69K
- SAE J1171
- ISO8846
- RoHS
- cRUus
- CE
- EPIC®
Certifications vary by model — see the corresponding model datasheet for details.
- 01Max. Switching Voltage
- 70 kVdc
- 02Max. Continuous Current
- 150 A
- 03Contact Configuration
- 1 Form C · SPDT
- 04Model Count
- 23 models
SHARED ACROSS ALL MODELSContact Form:SPDTContact Form:Form CCoil Voltage:12 / 26.5 / 115 VdcConnection Types:Bus Wire · Turret · Flying Leads · Solder · StudMounting:Flange · Jam-Nut · PCB · ThreadedConstruction:Vacuum / gas-filled hermetic
01
SPDT Series 1 form c Contactor Models
Sorted by current rating (150A → 1000A)
23 MODELS145 PRODUCTS
| CONFIGURATOR | MODEL↑ current | Contact Voltage (kV) | Continuous Current (A) | Mounting Types | |
|---|---|---|---|---|---|
GH1 | 3.5kV | 25 | — | Datasheet (PDF) — GH1 | |
GH3 | 3.5kV | 18 | — | Datasheet (PDF) — GH3 | |
GH5 | 3.5kV | 8 | — | Datasheet (PDF) — GH5 | |
G41C | 5kV | 30 | — | Datasheet (PDF) — G41C | |
G45C | 5kV | 20 | — | Datasheet (PDF) — G45C | |
GH2 | 8kV | 25 | — | Datasheet (PDF) — GH2 | |
GH4 | 8kV | 15 | — | Datasheet (PDF) — GH4 | |
GH6 | 8kV | 8 | — | Datasheet (PDF) — GH6 | |
G43C | 10kV | 25 | — | Datasheet (PDF) — G43C | |
G81C | 10kV | 5/10 | — | Datasheet (PDF) — G81C | |
G15 | 15kV | 12 | — | Datasheet (PDF) — G15 | |
G18 | 15kV | 30 | — | Datasheet (PDF) — G18 | |
G2 | 15kV | 50 | — | Datasheet (PDF) — G2 | |
G8 | 15kV | 30 | — | Datasheet (PDF) — G8 | |
CONFIGURATOR · G8 1Model:G8G8 | |||||
G9 | 20kV | 75 | — | Datasheet (PDF) — G9 | |
G25 | 25kV | 18 | — | Datasheet (PDF) — G25 | |
G50 | 25kV | 110 | — | Datasheet (PDF) — G50 | |
G52 | 25kV | 150 | — | Datasheet (PDF) — G52 | |
G62C | 25kV | 18 | — | Datasheet (PDF) — G62C | |
G60C | 35kV | 12 | — | Datasheet (PDF) — G60C | |
G61C | 35kV | 10 | — | Datasheet (PDF) — G61C | |
G64C | 50kV | 10 | — | Datasheet (PDF) — G64C | |
G71C | 70kV | 10 | — | Datasheet (PDF) — G71C | |
02
Latching Models
8 models · Holds state without continuous coil power
8 MODELS3 PRODUCTS
| CONFIGURATOR | MODEL | Contact Voltage (kV) | Continuous Current (A) | Mounting Types | |
|---|---|---|---|---|---|
G15L | 15kV | 12 | — | Datasheet (PDF) — G15L | |
G2L | 15kV | 50 | — | Datasheet (PDF) — G2L | |
G8L | 15kV | 30 | — | Datasheet (PDF) — G8L | |
| — | 25kV | 18 | — | Datasheet (PDF) — G62LC | |
| — | 35kV | 12 | — | Datasheet (PDF) — G60L | |
| — | 35kV | 10 | — | Datasheet (PDF) — G61LC | |
| — | 50kV | 10 | — | Datasheet (PDF) — G64LC | |
| — | 70kV | 10 | — | Datasheet (PDF) — G71LC |
TECHNICAL DIFFERENTIATORS
Why SPDT Series?
Flexible Coil and Configuration
12 / 24 / 48 / 110 Vdc coil
Directly compatible with industrial and mobile DC bus voltages.
Economiser profiles
On selected models hold-current is reduced for lower long-term coil consumption.
High-Current Models
G50 (110 A) · G52 (150 A) · G2 (50 A)
Continuous current capacity for EV main power switching, test and industrial HV transfer.
Hermetic HV contact chamber
Consistent arc extinction and long mechanical life even in high-current switching.
3.5 kV — 70 kV Single Family Range
GH series low-HV (3.5 — 8 kV)
GH1, GH2, GH3, GH4, GH5, GH6 compact options for test, instrumentation and low-power HV.
Ultra-HV (35 — 70 kV)
G61C, G64C, G71C for scientific equipment, particle physics, X-ray and space systems.
Single-Coil Bidirectional Switching
NO + NC in one mechanical assembly
Single coil instead of two separate SPSTs; driver circuit and mounting footprint cut in half.
Break-before-make behaviour
Prevents both outputs from conducting simultaneously — no line-to-line short risk.
DATASHEET · GUIDE · APPLICATION NOTE
SPDT Series — Technical Resources
Datasheets
- GIGAVAC SPDT Form C Datasheet Set — GH1, GH2, GH3, GH4, GH5, GH6, G15, G18, G2, G8, G9, G25, G50, G52, G62C, G60C, G61C, G64C, G71CSOON
- Latching Form C Datasheets — G15L, G2L, G8L, G62LC, G60L, G61LC, G64LC, G71LCSOON
Selection Guides
- GIGAVAC HV Relay Selection Guide — SPDT Form CSOON
- SPDT vs Two SPSTs — Decision Flow, BOM and SynchronisationSOON
Application Notes
- A/B Source Selection and Redundant Transfer Switch DesignSOON
- Form C Switching in HV Test and Measurement CircuitsSOON
FREQUENTLY ASKED QUESTIONS
About the SPDT series
06/06
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