Murata MHR0429SA Replacement — SIP High Voltage Resistor

MHR0429SA cross reference

Item	Murata MHR0429SA	HVC alternative
Body (L × H)	30.5 × 6.5 mm	6.5 mm high, cut to 30.5 mm long, cut to 30.5 mm
Lead pitch	27.94 mm	Same, set on the drawing
Rated power	1.7 W	1 W
Rated voltage	12 kV single / 22 kV molded	10 kV air, continuous
Resistance	1–2000 MΩ, nine steps	Any value in range
Model	MHR0429SA	HVRGHP6.30

Same outline. Murata figures are the catalogue values for this body. HVC ratings are continuous values in air. Confirm the medium and the duty in the RFQ.

Why buyers arrive with a MHR0429SA number

The usual case is not a purchase order. It is a repair, a drawing carried over from an older machine, or a design inherited from a supplier that no longer supports it. The number is the only firm fact available, and the question behind it is simply whether the part can still be obtained at the printed outline.

That is a different question from price. Murata builds MHR0429SA in nine resistance steps; anything between the steps, anything above 1.7 W, or anything above 12 kV in air has no catalogue answer at all, and that is where a cut-to-outline plate replaces the original rather than competing with it.

Reading the MHR0429SA voltage figure

Two columns sit behind the headline number: 12 kV for single use and 22 kV for molded use. The gap is the potting, not the resistor. A substitute quoted at the molded figure without the molding is not the same part, so state the medium and the duty in the enquiry and the quotation will match it.

MHR0429SA ordering codes

Le code est MHR0429SA plus a three digit resistance code, a tolerance letter and a two digit individual specification: 70 for single use, 20 for molded use. Standard resistance steps are 10, 15, 20, 25, 30, 40, 50, 68 and 80; the three digit code carries two significant figures and the number of zeros that follow.

Resistance	Code	Ordering number (±1%, single use)
1 MΩ	`105`	`MHR0429SA105F70`
1.5 MΩ	`155`	`MHR0429SA155F70`
2 MΩ	`205`	`MHR0429SA205F70`
2.5 MΩ	`255`	`MHR0429SA255F70`
3 MΩ	`305`	`MHR0429SA305F70`
4 MΩ	`405`	`MHR0429SA405F70`
5 MΩ	`505`	`MHR0429SA505F70`
6.8 MΩ	`685`	`MHR0429SA685F70`
8 MΩ	`805`	`MHR0429SA805F70`
10 MΩ	`106`	`MHR0429SA106F70`
15 MΩ	`156`	`MHR0429SA156F70`
20 MΩ	`206`	`MHR0429SA206F70`
25 MΩ	`256`	`MHR0429SA256F70`
30 MΩ	`306`	`MHR0429SA306F70`
40 MΩ	`406`	`MHR0429SA406F70`
50 MΩ	`506`	`MHR0429SA506F70`
68 MΩ	`686`	`MHR0429SA686F70`
80 MΩ	`806`	`MHR0429SA806F70`
100 MΩ	`107`	`MHR0429SA107F70`
150 MΩ	`157`	`MHR0429SA157F70`
200 MΩ	`207`	`MHR0429SA207F70`
250 MΩ	`257`	`MHR0429SA257F70`
300 MΩ	`307`	`MHR0429SA307F70`
400 MΩ	`407`	`MHR0429SA407F70`
500 MΩ	`507`	`MHR0429SA507F70`
680 MΩ	`687`	`MHR0429SA687F70`
800 MΩ	`807`	`MHR0429SA807F70`
1000 MΩ (1 GΩ)	`108`	`MHR0429SA108F70`

Tolerance letters: D ±0.5%, F ±1%, G ±2%, J ±5%, K ±10%, M ±20%. Replace F with the tolerance you need, and 70 au 20 for the molded specification. HVC builds any value in the range to the same outline.

MHR0429SA replacement FAQ

Do I need to have bought the MHR0429SA before?

No. Most enquiries arrive with a part number and no purchase history - a repair, a legacy drawing, or a design inherited from another team. Send the number and the quantity; HVC quotes a substitute against the printed outline rather than asking for an order history.

Is the MHR0429SA body still available?

HVC supplies the HVRGHP6.30 plate cut to 30.5 mm, 6.5 mm high, with the lead pitch set to 27.94 mm. This size is held as a catalogue outline.

What does the voltage figure actually mean?

Murata lists two columns: 12 kV single use and 22 kV molded use. The higher number depends on the part being potted. HVC quotes a continuous working voltage in air, so compare air with air and ask for the medium on any substitute you are offered.

Can HVC supply values outside the 1 to 2000 MΩ range?

Yes. Murata builds nine resistance steps; HVC builds any value in the range, which is the usual reason a buyer with a MHR0429SA drawing cannot simply re-order the original.